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  • Mice  (189)
  • Cells, Cultured  (59)
  • Transfection  (57)
  • American Association for the Advancement of Science (AAAS)  (252)
  • American Institute of Physics (AIP)
  • Oxford University Press
  • 1995-1999  (252)
  • 1990-1994
  • 1999  (252)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (252)
  • American Institute of Physics (AIP)
  • Oxford University Press
Years
  • 1995-1999  (252)
  • 1990-1994
Year
  • 101
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    Microglial activation resulting from CD40-CD40L interaction after beta-amyloid stimulation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-22
    Description: Alzheimer's disease (AD) has a substantial inflammatory component, and activated microglia may play a central role in neuronal degeneration. CD40 expression was increased on cultured microglia treated with freshly solublized amyloid-beta (Abeta, 500 nanomolar) and on microglia from a transgenic murine model of AD (Tg APPsw). Increased tumor necrosis factor alpha production and induction of neuronal injury occurred when Abeta-stimulated microglia were treated with CD40 ligand (CD40L). Microglia from Tg APPsw mice deficient for CD40L demonstrated reduction in activation, suggesting that the CD40-CD40L interaction is necessary for Abeta-induced microglial activation. Finally, abnormal tau phosphorylation was reduced in Tg APPsw animals deficient for CD40L, suggesting that the CD40-CD40L interaction is an early event in AD pathogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tan, J -- Town, T -- Paris, D -- Mori, T -- Suo, Z -- Crawford, F -- Mattson, M P -- Flavell, R A -- Mullan, M -- New York, N.Y. -- Science. 1999 Dec 17;286(5448):2352-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Roskamp Institute, University of South Florida, 3515 East Fletcher Avenue, Tampa, FL 33613, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10600748" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/metabolism ; Amyloid beta-Peptides/*metabolism/pharmacology ; Animals ; Antigens, CD40/biosynthesis/*metabolism ; CD40 Ligand ; Cell Death ; Cells, Cultured ; Interferon-gamma/pharmacology ; Interleukins/pharmacology ; Ligands ; Membrane Glycoproteins/*metabolism/pharmacology ; Mice ; Mice, Transgenic ; Microglia/cytology/immunology/*metabolism ; Neurons/cytology ; Peptide Fragments/pharmacology ; Phosphorylation ; Signal Transduction ; Tumor Necrosis Factor-alpha/biosynthesis/pharmacology ; tau Proteins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 102
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    Discovery of a small molecule insulin mimetic with antidiabetic activity in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-13
    Description: Insulin elicits a spectrum of biological responses by binding to its cell surface receptor. In a screen for small molecules that activate the human insulin receptor tyrosine kinase, a nonpeptidyl fungal metabolite (L-783,281) was identified that acted as an insulin mimetic in several biochemical and cellular assays. The compound was selective for insulin receptor versus insulin-like growth factor I (IGFI) receptor and other receptor tyrosine kinases. Oral administration of L-783,281 to two mouse models of diabetes resulted in significant lowering in blood glucose levels. These results demonstrate the feasibility of discovering novel insulin receptor activators that may lead to new therapies for diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, B -- Salituro, G -- Szalkowski, D -- Li, Z -- Zhang, Y -- Royo, I -- Vilella, D -- Diez, M T -- Pelaez, F -- Ruby, C -- Kendall, R L -- Mao, X -- Griffin, P -- Calaycay, J -- Zierath, J R -- Heck, J V -- Smith, R G -- Moller, D E -- New York, N.Y. -- Science. 1999 May 7;284(5416):974-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Endocrinology, Merck Research Laboratories, R80W250, Post Office Box 2000, Rahway, NJ 07065, USA. bei_zhang@merck.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10320380" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Ascomycota/*metabolism ; Binding Sites ; Blood Glucose/metabolism ; CHO Cells ; Cricetinae ; Diabetes Mellitus, Type 2/*drug therapy ; Dose-Response Relationship, Drug ; Drug Evaluation, Preclinical ; Enzyme Activation ; Glucose Tolerance Test ; Hyperglycemia/drug therapy ; Hypoglycemic Agents/chemistry/metabolism/*pharmacology/therapeutic use ; Indoles/chemistry/metabolism/*pharmacology/therapeutic use ; Insulin/blood/metabolism/*pharmacology ; Insulin Receptor Substrate Proteins ; Mice ; Mice, Mutant Strains ; Mice, Obese ; Molecular Mimicry ; Phosphoproteins/metabolism ; Phosphorylation ; Protein Conformation/drug effects ; Receptor, Epidermal Growth Factor/metabolism ; Receptor, IGF Type 1/metabolism ; Receptor, Insulin/chemistry/*metabolism ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 103
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    Potential target found for antimetastasis drugs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finkel, E -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):33-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428697" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/therapeutic use ; Clinical Trials as Topic ; Cloning, Molecular ; *Glucuronidase ; Glycoside Hydrolases/*antagonists & inhibitors/*genetics/isolation & ; purification/metabolism ; Humans ; Mice ; Neoplasm Metastasis/*prevention & control ; Rats ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 104
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    Beta-arrestin-dependent formation of beta2 adrenergic receptor-Src protein kinase complexes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-29
    Description: The Ras-dependent activation of mitogen-activated protein (MAP) kinase pathways by many receptors coupled to heterotrimeric guanine nucleotide binding proteins (G proteins) requires the activation of Src family tyrosine kinases. Stimulation of beta2 adrenergic receptors resulted in the assembly of a protein complex containing activated c-Src and the receptor. Src recruitment was mediated by beta-arrestin, which functions as an adapter protein, binding both c-Src and the agonist-occupied receptor. beta-Arrestin 1 mutants, impaired either in c-Src binding or in the ability to target receptors to clathrin-coated pits, acted as dominant negative inhibitors of beta2 adrenergic receptor-mediated activation of the MAP kinases Erk1 and Erk2. These data suggest that beta-arrestin binding, which terminates receptor-G protein coupling, also initiates a second wave of signal transduction in which the "desensitized" receptor functions as a critical structural component of a mitogenic signaling complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Luttrell, L M -- Ferguson, S S -- Daaka, Y -- Miller, W E -- Maudsley, S -- Della Rocca, G J -- Lin, F -- Kawakatsu, H -- Owada, K -- Luttrell, D K -- Caron, M G -- Lefkowitz, R J -- DK02352/DK/NIDDK NIH HHS/ -- DK55524/DK/NIDDK NIH HHS/ -- HL16037/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jan 29;283(5402):655-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9924018" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic beta-Agonists/metabolism/pharmacology ; Animals ; Arrestins/genetics/*metabolism ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Cell Line ; Cell Membrane/metabolism ; Enzyme Activation ; GTP-Binding Proteins/metabolism ; Humans ; Isoproterenol/metabolism/pharmacology ; Mitogen-Activated Protein Kinase 1 ; Mitogen-Activated Protein Kinase 3 ; *Mitogen-Activated Protein Kinases ; Models, Biological ; Phosphorylation ; Point Mutation ; Precipitin Tests ; Proto-Oncogene Proteins pp60(c-src)/*metabolism ; Receptor Cross-Talk ; Receptors, Adrenergic, beta-2/*metabolism ; Receptors, Cell Surface/metabolism ; *Signal Transduction ; Transfection ; src Homology Domains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 105
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    Mapping smells in the brain (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):508.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10447477" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Mapping ; Diagnostic Imaging ; Light ; Mice ; *Odors ; Olfactory Bulb/*physiology ; Olfactory Receptor Neurons/physiology ; Rats ; Receptors, Odorant/*physiology ; Smell/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 106
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    Proapoptotic Bcl-2 relative Bim required for certain apoptotic responses, leukocyte homeostasis, and to preclude autoimmunity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-27
    Description: Apoptosis can be triggered by members of the Bcl-2 protein family, such as Bim, that share only the BH3 domain with this family. Gene targeting in mice revealed important physiological roles for Bim. Lymphoid and myeloid cells accumulated, T cell development was perturbed, and most older mice accumulated plasma cells and succumbed to autoimmune kidney disease. Lymphocytes were refractory to apoptotic stimuli such as cytokine deprivation, calcium ion flux, and microtubule perturbation but not to others. Thus, Bim is required for hematopoietic homeostasis and as a barrier to autoimmunity. Moreover, particular death stimuli appear to activate apoptosis through distinct BH3-only proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bouillet, P -- Metcalf, D -- Huang, D C -- Tarlinton, D M -- Kay, T W -- Kontgen, F -- Adams, J M -- Strasser, A -- CA43540/CA/NCI NIH HHS/ -- CA80188/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1735-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria 3050, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10576740" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Apoptosis Regulatory Proteins ; Autoimmune Diseases/etiology ; *Autoimmunity ; B-Lymphocytes/physiology ; Carrier Proteins/*physiology ; Cells, Cultured ; Crosses, Genetic ; Female ; Gene Targeting ; Glomerulonephritis/etiology ; Hematopoietic Stem Cells/physiology ; Homeostasis ; Leukocyte Count ; Leukocytes/*physiology ; Male ; *Membrane Proteins ; Mice ; Mice, Transgenic ; *Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-bcl-2/physiology ; Signal Transduction ; T-Lymphocyte Subsets/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 107
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    Circadian rhythms. CRY's clock role differs in mice, flies (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):506-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10447476" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Clocks ; Cell Nucleus/metabolism ; *Circadian Rhythm ; Cryptochromes ; Drosophila ; *Drosophila Proteins ; Evolution, Molecular ; *Eye Proteins ; Feedback ; Flavoproteins/genetics/*metabolism ; Gene Expression Regulation ; Insect Proteins/metabolism ; *Light ; Mice ; Nuclear Proteins/metabolism ; Period Circadian Proteins ; *Photoreceptor Cells, Invertebrate ; Receptors, G-Protein-Coupled
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 108
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    Vessel cooption, regression, and growth in tumors mediated by angiopoietins and VEGF (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-18
    Description: In contrast with the prevailing view that most tumors and metastases begin as avascular masses, evidence is presented here that a subset of tumors instead initially grows by coopting existing host vessels. This coopted host vasculature does not immediately undergo angiogenesis to support the tumor but instead regresses, leading to a secondarily avascular tumor and massive tumor cell loss. Ultimately, however, the remaining tumor is rescued by robust angiogenesis at the tumor margin. The expression patterns of the angiogenic antagonist angiopoietin-2 and of pro-angiogenic vascular endothelial growth factor (VEGF) suggest that these proteins may be critical regulators of this balance between vascular regression and growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holash, J -- Maisonpierre, P C -- Compton, D -- Boland, P -- Alexander, C R -- Zagzag, D -- Yancopoulos, G D -- Wiegand, S J -- New York, N.Y. -- Science. 1999 Jun 18;284(5422):1994-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Regeneron Pharmaceuticals, 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10373119" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/blood supply/pathology ; Angiopoietin-1 ; Angiopoietin-2 ; Animals ; Apoptosis ; Blood Vessels/pathology ; Endothelial Growth Factors/genetics/*physiology ; Endothelium, Vascular/pathology/physiology ; Glioblastoma/blood supply/pathology ; Glioma/blood supply/pathology ; In Situ Hybridization ; Lymphokines/genetics/*physiology ; Male ; Membrane Glycoproteins/genetics/*physiology ; Mice ; Mice, Inbred C57BL ; Muscle, Smooth, Vascular/pathology/physiology ; Neoplasm Transplantation ; Neoplasms, Experimental/*blood supply/*pathology ; *Neovascularization, Pathologic ; Proteins/genetics/*physiology ; Rats ; Rats, Sprague-Dawley ; Up-Regulation ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 109
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    Initiation of mammalian liver development from endoderm by fibroblast growth factors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-18
    Description: The signaling molecules that elicit embryonic induction of the liver from the mammalian gut endoderm or induction of other gut-derived organs are unknown. Close proximity of cardiac mesoderm, which expresses fibroblast growth factors (FGFs) 1, 2, and 8, causes the foregut endoderm to develop into the liver. Treatment of isolated foregut endoderm from mouse embryos with FGF1 or FGF2, but not FGF8, was sufficient to replace cardiac mesoderm as an inducer of the liver gene expression program, the latter being the first step of hepatogenesis. The hepatogenic response was restricted to endoderm tissue, which selectively coexpresses FGF receptors 1 and 4. Further studies with FGFs and their specific inhibitors showed that FGF8 contributes to the morphogenetic outgrowth of the hepatic endoderm. Thus, different FGF signals appear to initiate distinct phases of liver development during mammalian organogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jung, J -- Zheng, M -- Goldfarb, M -- Zaret, K S -- GM36477/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jun 18;284(5422):1998-2003.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Box G-J363, Providence, RI 02912, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10373120" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Culture Techniques ; Digestive System/embryology ; *Embryonic Induction ; Endoderm/metabolism/*physiology ; Fibroblast Growth Factor 1 ; Fibroblast Growth Factor 2/genetics/pharmacology/physiology ; Fibroblast Growth Factor 8 ; Fibroblast Growth Factors/genetics/pharmacology/*physiology ; Gene Expression ; Heart/embryology ; Heparitin Sulfate/pharmacology ; Liver/*embryology/metabolism ; Mesoderm/metabolism ; Mice ; Mice, Inbred C3H ; Morphogenesis ; Organ Specificity ; Prealbumin/genetics ; Receptors, Fibroblast Growth Factor/physiology ; Recombinant Fusion Proteins ; Serum Albumin/genetics ; Signal Transduction ; alpha-Fetoproteins/genetics
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 110
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    An immunization against Alzheimer's? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):175, 177.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428706" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/pathology/*prevention & control/*therapy ; Amyloid beta-Peptides/*immunology ; Animals ; Antibodies/immunology ; Brain/pathology ; Clinical Trials as Topic ; Humans ; *Immunization ; Mice ; Mice, Transgenic ; Plaque, Amyloid/pathology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 111
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    New clues to how neurons strengthen their connections (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1755-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10391789" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/cytology/physiology ; Cells, Cultured ; Dendrites/physiology/ultrastructure ; Glutamic Acid/*physiology ; Long-Term Potentiation/*physiology ; Mice ; Neurons/physiology ; Rats ; Receptors, AMPA/*physiology ; Receptors, N-Methyl-D-Aspartate/*physiology ; Synapses/*physiology
    Print ISSN: 0036-8075
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  • 112
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    Association of BRCA1 with the hRad50-hMre11-p95 complex and the DNA damage response (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: BRCA1 encodes a tumor suppressor that is mutated in familial breast and ovarian cancers. Here, it is shown that BRCA1 interacts in vitro and in vivo with hRad50, which forms a complex with hMre11 and p95/nibrin. Upon irradiation, BRCA1 was detected in discrete foci in the nucleus, which colocalize with hRad50. Formation of irradiation-induced foci positive for BRCA1, hRad50, hMre11, or p95 was dramatically reduced in HCC/1937 breast cancer cells carrying a homozygous mutation in BRCA1 but was restored by transfection of wild-type BRCA1. Ectopic expression of wild-type, but not mutated, BRCA1 in these cells rendered them less sensitive to the DNA damage agent, methyl methanesulfonate. These data suggest that BRCA1 is important for the cellular responses to DNA damage that are mediated by the hRad50-hMre11-p95 complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhong, Q -- Chen, C F -- Li, S -- Chen, Y -- Wang, C C -- Xiao, J -- Chen, P L -- Sharp, Z D -- Lee, W H -- CA 30195/CA/NCI NIH HHS/ -- CA 58183/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):747-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine, Institute of Biotechnology, University of Texas Health Science Center at San Antonio, 15355 Lambda Drive, San Antonio, TX 78245, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426999" target="_blank"〉PubMed〈/a〉
    Keywords: BRCA1 Protein/*metabolism ; Cell Cycle Proteins/*metabolism ; Cell Nucleus/*metabolism ; Cell Survival ; *DNA Damage ; *DNA Repair Enzymes ; DNA-Binding Proteins/*metabolism ; Gamma Rays ; Genes, BRCA1 ; Humans ; Methyl Methanesulfonate/pharmacology ; Mutagens/pharmacology ; Mutation ; *Nuclear Proteins ; Rad51 Recombinase ; Recombination, Genetic ; Transfection ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 113
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    Identification of a nuclear receptor for bile acids (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: Bile acids are essential for the solubilization and transport of dietary lipids and are the major products of cholesterol catabolism. Results presented here show that bile acids are physiological ligands for the farnesoid X receptor (FXR), an orphan nuclear receptor. When bound to bile acids, FXR repressed transcription of the gene encoding cholesterol 7alpha-hydroxylase, which is the rate-limiting enzyme in bile acid synthesis, and activated the gene encoding intestinal bile acid-binding protein, which is a candidate bile acid transporter. These results demonstrate a mechanism by which bile acids transcriptionally regulate their biosynthesis and enterohepatic transport.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Makishima, M -- Okamoto, A Y -- Repa, J J -- Tu, H -- Learned, R M -- Luk, A -- Hull, M V -- Lustig, K D -- Mangelsdorf, D J -- Shan, B -- New York, N.Y. -- Science. 1999 May 21;284(5418):1362-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Pharmacology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75235-9050, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334992" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bile Acids and Salts/biosynthesis/*metabolism ; Biological Transport ; Carrier Proteins/*genetics/metabolism ; Cell Line ; Chenodeoxycholic Acid/*metabolism ; Cholesterol/metabolism ; Cholesterol 7-alpha-Hydroxylase/*genetics ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Gene Expression Regulation ; Histone Acetyltransferases ; Homeostasis ; Humans ; *Hydroxysteroid Dehydrogenases ; Ligands ; Liver/metabolism ; *Membrane Glycoproteins ; Mice ; Nuclear Receptor Coactivator 1 ; *Organic Anion Transporters, Sodium-Dependent ; Receptors, Cytoplasmic and Nuclear/chemistry/genetics/*metabolism ; *Symporters ; Transcription Factors/chemistry/genetics/*metabolism ; Transfection ; Tumor Cells, Cultured
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  • 114
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    Genetic variation in susceptibility to endocrine disruption by estrogen in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: Large (more than 16-fold) differences in susceptibility to disruption of juvenile male reproductive development by 17beta-estradiol (E2) were detected between strains of mice. Effects of strain, E2 dose, and the interaction of strain and E2 dose on testes weight and spermatogenesis were all highly significant (P 〈 0.0001). Spermatid maturation was eliminated by low doses of E2 in strains such as C57BL/6J and C17/Jls. In contrast, mice of the widely used CD-1 line, which has been selected for large litter size, showed little or no inhibition of spermatid maturation even in response to 16 times as much E2. Product safety bioassays conducted with animals selected for fecundity may greatly underestimate disruption of male reproductive development by estradiol and environmental estrogenic compounds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spearow, J L -- Doemeny, P -- Sera, R -- Leffler, R -- Barkley, M -- New York, N.Y. -- Science. 1999 Aug 20;285(5431):1259-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Neurobiology, Physiology and Behavior, University of California at Davis, Davis, CA 95616, USA. jlspearow@ucdavis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10455051" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Weight/drug effects ; Dose-Response Relationship, Drug ; Estradiol/*pharmacology/toxicity ; *Genetic Variation ; Litter Size ; Male ; Mice ; Mice, Inbred Strains ; Organ Size/drug effects ; Species Specificity ; Spermatids/drug effects ; Spermatogenesis/*drug effects ; Testis/anatomy & histology/*drug effects ; Toxicity Tests
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    Circadian rhythms. The clock plot thickens (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):421-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10232983" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Clocks/*physiology ; Circadian Rhythm/*physiology ; Cryptochromes ; Darkness ; *Drosophila Proteins ; *Eye Proteins ; Flavoproteins/genetics/*physiology ; Humans ; *Light ; Mice ; Mutation ; *Ocular Physiological Phenomena ; *Photoreceptor Cells, Invertebrate ; Photoreceptor Cells, Vertebrate/*physiology ; Receptors, G-Protein-Coupled
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    KDR receptor: a key marker defining hematopoietic stem cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-08
    Description: Studies on pluripotent hematopoietic stem cells (HSCs) have been hindered by lack of a positive marker, comparable to the CD34 marker of hematopoietic progenitor cells (HPCs). In human postnatal hematopoietic tissues, 0.1 to 0.5% of CD34(+) cells expressed vascular endothelial growth factor receptor 2 (VEGFR2, also known as KDR). Pluripotent HSCs were restricted to the CD34+KDR+ cell fraction. Conversely, lineage-committed HPCs were in the CD34+KDR- subset. On the basis of limiting dilution analysis, the HSC frequency in the CD34+KDR+ fraction was 20 percent in bone marrow (BM) by mouse xenograft assay and 25 to 42 percent in BM, peripheral blood, and cord blood by 12-week long-term culture (LTC) assay. The latter values rose to 53 to 63 percent in LTC supplemented with VEGF and to greater than 95 percent for the cell subfraction resistant to growth factor starvation. Thus, KDR is a positive functional marker defining stem cells and distinguishing them from progenitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ziegler, B L -- Valtieri, M -- Porada, G A -- De Maria, R -- Muller, R -- Masella, B -- Gabbianelli, M -- Casella, I -- Pelosi, E -- Bock, T -- Zanjani, E D -- Peschle, C -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1553-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Hematology and Oncology, University of Tubingen, Otfried-Muller-Strasse 10, D-72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD34/*analysis ; Bone Marrow Cells/cytology ; Cell Lineage ; Cell Separation ; Cells, Cultured ; Endothelial Growth Factors/pharmacology ; Female ; Fetal Blood/cytology ; Fetus ; Flow Cytometry ; *Hematopoiesis ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/chemistry/*cytology/drug effects/physiology ; Humans ; Lymphokines/pharmacology ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Phenotype ; Pregnancy ; Receptor Protein-Tyrosine Kinases/*analysis/physiology ; Receptors, Growth Factor/*analysis/physiology ; Receptors, Vascular Endothelial Growth Factor ; Sheep ; Transplantation, Heterologous ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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    IkappaB kinases: kinsmen with different crafts (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉May, M J -- Ghosh, S -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):271-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10232975" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Multiple/enzymology/genetics ; Animals ; Bone Development ; DNA-Binding Proteins/metabolism ; Dimerization ; *Embryonic and Fetal Development ; Gene Targeting ; I-kappa B Kinase ; I-kappa B Proteins ; Interleukin-1/pharmacology ; Mice ; Morphogenesis ; NF-kappa B/*metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Signal Transduction ; Skin/embryology ; Tumor Necrosis Factor-alpha/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 118
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    Regulation of mammalian circadian behavior by non-rod, non-cone, ocular photoreceptors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-16
    Description: Circadian rhythms of mammals are entrained by light to follow the daily solar cycle (photoentrainment). To determine whether retinal rods and cones are required for this response, the effects of light on the regulation of circadian wheel-running behavior were examined in mice lacking these photoreceptors. Mice without cones (cl) or without both rods and cones (rdta/cl) showed unattenuated phase-shifting responses to light. Removal of the eyes abolishes this behavior. Thus, neither rods nor cones are required for photoentrainment, and the murine eye contains additional photoreceptors that regulate the circadian clock.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freedman, M S -- Lucas, R J -- Soni, B -- von Schantz, M -- Munoz, M -- David-Gray, Z -- Foster, R -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):502-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Alexander Fleming Building, Imperial College of Science, Technology and Medicine, London, SW7 2AZ, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10205061" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Clocks/*physiology ; Circadian Rhythm/*physiology ; *Light ; Mice ; Mice, Transgenic ; Motor Activity ; *Ocular Physiological Phenomena ; Photoreceptor Cells, Vertebrate/*physiology ; Pigments, Biological/physiology ; Retinal Cone Photoreceptor Cells/physiology ; Retinal Pigments/physiology ; Retinal Rod Photoreceptor Cells/physiology
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    Reciprocal control of T helper cell and dendritic cell differentiation (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-02-19
    Description: It is not known whether subsets of dendritic cells provide different cytokine microenvironments that determine the differentiation of either type-1 T helper (TH1) or TH2 cells. Human monocyte (pDC1)-derived dendritic cells (DC1) were found to induce TH1 differentiation, whereas dendritic cells (DC2) derived from CD4+CD3-CD11c- plasmacytoid cells (pDC2) induced TH2 differentiation by use of a mechanism unaffected by interleukin-4 (IL-4) or IL-12. The TH2 cytokine IL-4 enhanced DC1 maturation and killed pDC2, an effect potentiated by IL-10 but blocked by CD40 ligand and interferon-gamma. Thus, a negative feedback loop from the mature T helper cells may selectively inhibit prolonged TH1 or TH2 responses by regulating survival of the appropriate dendritic cell subset.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rissoan, M C -- Soumelis, V -- Kadowaki, N -- Grouard, G -- Briere, F -- de Waal Malefyt, R -- Liu, Y J -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1183-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Schering-Plough, Laboratory for Immunological Research, 27 chemin des Peupliers, Boite Postale 11, 69571, Dardilly, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10024247" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, CD40 ; Apoptosis ; CD40 Ligand ; Cell Differentiation ; Cell Lineage ; Cell Survival ; Cells, Cultured ; Coculture Techniques ; Dendritic Cells/*cytology/immunology ; Feedback ; Humans ; Interferon-gamma/biosynthesis/pharmacology ; Interleukin-12/biosynthesis/pharmacology/physiology ; Interleukin-4/biosynthesis/pharmacology/*physiology ; Interleukins/biosynthesis/pharmacology ; Lymphocyte Activation ; Membrane Glycoproteins/pharmacology ; Stem Cells/cytology ; Th1 Cells/*cytology/immunology ; Th2 Cells/*cytology/immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Impaired B cell development and proliferation in absence of phosphoinositide 3-kinase p85alpha (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: Phosphoinositide 3-kinase (PI3K) activation has been implicated in many cellular responses, including fibroblast growth, transformation, survival, and chemotaxis. Although PI3K is activated by several agents that stimulate T and B cells, the role of PI3K in lymphocyte function is not clear. The mouse gene encoding the PI3K adapter subunit p85alpha and its splice variants p55alpha and p50alpha was disrupted. Most p85alpha-p55alpha-p50alpha-/- mice die within days after birth. Lymphocyte development and function was studied with the use of the RAG2-deficient blastocyst complementation system. Chimeric mice had reduced numbers of peripheral mature B cells and decreased serum immunoglobulin. The B cells that developed had diminished proliferative responses to antibody to immunoglobulin M, antibody to CD40, and lipopolysaccharide stimulation and decreased survival after incubation with interleukin-4. In contrast, T cell development and proliferation was normal. This phenotype is similar to defects observed in mice lacking the tyrosine kinase Btk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fruman, D A -- Snapper, S B -- Yballe, C M -- Davidson, L -- Yu, J Y -- Alt, F W -- Cantley, L C -- R01 GM041890/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):393-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA. dfruman@bidmc.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888855" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD45/analysis ; Apoptosis ; B-Lymphocytes/cytology/enzymology/*immunology ; Catalytic Domain ; Cell Cycle ; Chimera ; Chromones/pharmacology ; Enzyme Inhibitors/pharmacology ; Female ; Gene Targeting ; Immunoglobulins/*blood ; *Lymphocyte Activation ; Lymphocyte Count ; Male ; Mice ; Mice, Inbred C57BL ; Morpholines/pharmacology ; Phosphatidylinositol 3-Kinases/antagonists & inhibitors/genetics/*metabolism ; Protein-Tyrosine Kinases/genetics/metabolism ; Spleen/immunology ; T-Lymphocytes/cytology/enzymology/immunology
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    Broadly protective vaccine for Staphylococcus aureus based on an in vivo-expressed antigen (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-29
    Description: Vaccines based on preferential expression of bacterial antigens during human infection have not been described. Staphylococcus aureus synthesized poly-N-succinyl beta-1-6 glucosamine (PNSG) as a surface polysaccharide during human and animal infection, but few strains expressed PNSG in vitro. All S. aureus strains examined carried genes for PNSG synthesis. Immunization protected mice against kidney infections and death from strains that produced little PNSG in vitro. Nonimmune infected animals made antibody to PNSG, but serial in vitro cultures of kidney isolates yielded mostly cells that did not produce PNSG. PNSG is a candidate for use in a vaccine to protect against S. aureus infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McKenney, D -- Pouliot, K L -- Wang, Y -- Murthy, V -- Ulrich, M -- Doring, G -- Lee, J C -- Goldmann, D A -- Pier, G B -- AI2335/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 May 28;284(5419):1523-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Department of Medicine, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10348739" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Bacterial/*biosynthesis/blood ; Bacterial Capsules/immunology ; Child ; Female ; Genes, Bacterial ; Humans ; Immunization, Passive ; Immunoglobulin G/biosynthesis/blood ; Kidney/immunology/microbiology ; Kidney Diseases/immunology/microbiology/prevention & control ; Mice ; Polysaccharides, Bacterial/biosynthesis/*immunology ; Rabbits ; Staphylococcal Infections/immunology/microbiology/*prevention & control ; Staphylococcal Vaccines/*immunology ; Staphylococcus aureus/genetics/*immunology ; Vaccination
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    Role of serotonin in the paradoxical calming effect of psychostimulants on hyperactivity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: The mechanism by which psychostimulants act as calming agents in humans with attention-deficit hyperactivity disorder (ADHD) or hyperkinetic disorder is currently unknown. Mice lacking the gene encoding the plasma membrane dopamine transporter (DAT) have elevated dopaminergic tone and are hyperactive. This activity was exacerbated by exposure to a novel environment. Additionally, these mice were impaired in spatial cognitive function, and they showed a decrease in locomotion in response to psychostimulants. This paradoxical calming effect of psychostimulants depended on serotonergic neurotransmission. The parallels between the DAT knockout mice and individuals with ADHD suggest that common mechanisms may underlie some of their behaviors and responses to psychostimulants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gainetdinov, R R -- Wetsel, W C -- Jones, S R -- Levin, E D -- Jaber, M -- Caron, M G -- MH-40159/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):397-401.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute Laboratories, Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888856" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Attention Deficit Disorder with Hyperactivity/drug ; therapy/physiopathology/psychology ; Behavior, Animal/drug effects ; Carrier Proteins/antagonists & inhibitors/drug effects/genetics/metabolism ; Central Nervous System Stimulants/*pharmacology ; Corpus Striatum/*metabolism ; Dopamine/metabolism/physiology ; Dopamine Plasma Membrane Transport Proteins ; Fluoxetine/pharmacology ; Humans ; Hyperkinesis/*drug therapy/physiopathology/psychology ; Maze Learning ; Membrane Glycoproteins/drug effects/metabolism ; *Membrane Transport Proteins ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Motor Activity/drug effects ; *Nerve Tissue Proteins ; Norepinephrine Plasma Membrane Transport Proteins ; Serotonin/metabolism/*physiology ; Serotonin Plasma Membrane Transport Proteins ; Serotonin Uptake Inhibitors/pharmacology ; *Symporters ; *Synaptic Transmission
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    Reduced immunotoxicity and preservation of antibacterial activity in a releasable side-chain carbapenem antibiotic (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-29
    Description: A carbapenem antibiotic, L-786,392, was designed so that the side chain that provides high-affinity binding to the penicillin-binding proteins responsible for bacterial resistance was also the structural basis for ameliorating immunopathology. Expulsion of the side chain upon opening of the beta-lactam ring retained antibacterial activity while safely expelling the immunodominant epitope. L-786,392 was well tolerated in animal safety studies and had significant in vitro and in vivo activities against methicillin- and vancomycin-resistant Staphylococci and vancomycin-resistant Enterococci.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosen, H -- Hajdu, R -- Silver, L -- Kropp, H -- Dorso, K -- Kohler, J -- Sundelof, J G -- Huber, J -- Hammond, G G -- Jackson, J J -- Gill, C J -- Thompson, R -- Pelak, B A -- Epstein-Toney, J H -- Lankas, G -- Wilkening, R R -- Wildonger, K J -- Blizzard, T A -- DiNinno, F P -- Ratcliffe, R W -- Heck, J V -- Kozarich, J W -- Hammond, M L -- New York, N.Y. -- Science. 1999 Jan 29;283(5402):703-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Merck Research Laboratories, Rahway, NJ 07065, USA. hugh_rosen@merck.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9924033" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/blood ; *Bacterial Proteins ; Carbapenems/chemistry/*immunology/metabolism/*pharmacology/toxicity ; Carrier Proteins/metabolism ; Dipeptidases/metabolism ; *Drug Design ; Drug Resistance, Microbial ; Drug Resistance, Multiple ; Enterococcus/drug effects ; Erythrocytes/immunology ; Haptens ; *Hexosyltransferases ; Humans ; Immunodominant Epitopes ; Immunoglobulin G/blood ; Lactams/chemical synthesis/chemistry/metabolism/*pharmacology ; Lymphocyte Activation ; Macaca mulatta ; Mice ; Mice, Inbred DBA ; Microbial Sensitivity Tests ; Muramoylpentapeptide Carboxypeptidase/metabolism ; Penicillin-Binding Proteins ; *Peptidyl Transferases ; Staphylococcal Infections/drug therapy ; Staphylococcus/drug effects ; Thiazoles/chemical synthesis/chemistry/metabolism/*pharmacology
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    Differentiation stage-specific inhibition of the Raf-MEK-ERK pathway by Akt (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-11-27
    Description: Extracellular signals often result in simultaneous activation of both the Raf-MEK-ERK and PI3K-Akt pathways (where ERK is extracellular-regulated kinase, MEK is mitogen-activated protein kinase or ERK kinase, and PI3K is phosphatidylinositol 3-kinase). However, these two signaling pathways were shown to exert opposing effects on muscle cell hypertrophy. Furthermore, the PI3K-Akt pathway was shown to inhibit the Raf-MEK-ERK pathway; this cross-regulation depended on the differentiation state of the cell: Akt activation inhibited the Raf-MEK-ERK pathway in differentiated myotubes, but not in their myoblast precursors. The stage-specific inhibitory action of Akt correlated with its stage-specific ability to form a complex with Raf, suggesting the existence of differentially expressed mediators of an inhibitory Akt-Raf complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rommel, C -- Clarke, B A -- Zimmermann, S -- Nunez, L -- Rossman, R -- Reid, K -- Moelling, K -- Yancopoulos, G D -- Glass, D J -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1738-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Regeneron Pharmaceuticals, 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10576741" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Line ; Cyclin-Dependent Kinase Inhibitor p21 ; Cyclins/genetics ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Flavonoids/pharmacology ; Insulin-Like Growth Factor I/pharmacology ; MAP Kinase Signaling System/drug effects ; Mice ; Mitogen-Activated Protein Kinases/*antagonists & inhibitors/metabolism ; Muscle, Skeletal/*cytology/*metabolism ; Myogenin/genetics ; Phenotype ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/*metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-akt ; Proto-Oncogene Proteins c-raf/*antagonists & inhibitors/metabolism ; Signal Transduction ; Transfection ; Transgenes
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    A giant protease with potential to substitute for some functions of the proteasome (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-12
    Description: An alanyl-alanyl-phenylalanyl-7-amino-4-methylcoumarin-hydrolyzing protease particle copurifying with 26S proteasomes was isolated and identified as tripeptidyl peptidase II (TPPII), a cytosolic subtilisin-like peptidase of unknown function. The particle is larger than the 26S proteasome and has a rod-shaped, dynamic supramolecular structure. TPPII exhibits enhanced activity in proteasome inhibitor-adapted cells and degrades polypeptides by exo- as well as predominantly trypsin-like endoproteolytic cleavage. TPPII may thus participate in extralysosomal polypeptide degradation and may in part account for nonproteasomal epitope generation as postulated for certain major histocompatibility complex class I alleles. In addition, TPPII may be able to substitute for some metabolic functions of the proteasome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geier, E -- Pfeifer, G -- Wilm, M -- Lucchiari-Hartz, M -- Baumeister, W -- Eichmann, K -- Niedermann, G -- New York, N.Y. -- Science. 1999 Feb 12;283(5404):978-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck Institute of Immunobiology, Stubeweg 51, D-79108 Freiburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9974389" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcysteine/analogs & derivatives/pharmacology ; Alleles ; Amino Acid Chloromethyl Ketones/pharmacology ; Aminopeptidases ; Animals ; Cell Survival ; Coumarins/metabolism ; Cysteine Endopeptidases/*metabolism ; Cytosol/enzymology ; Dipeptidyl-Peptidases and Tripeptidyl-Peptidases ; Epitopes/metabolism ; Genes, MHC Class I ; Hydrolysis ; Mice ; Molecular Weight ; Multienzyme Complexes/*metabolism ; Oligopeptides/metabolism ; Proteasome Endopeptidase Complex ; Serine Endopeptidases/chemistry/isolation & purification/*metabolism ; Serine Proteinase Inhibitors/pharmacology ; Substrate Specificity ; Tumor Cells, Cultured
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    Mitochondrial recombination? (continued) (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Merriweather, D A -- Kaestle, F A -- New York, N.Y. -- Science. 1999 Aug 6;285(5429):837.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10454933" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Mitochondrial/*genetics ; Europe ; Genetic Linkage ; Haplotypes ; Humans ; Indians, North American/genetics ; Melanesia ; Mice ; *Polymorphism, Genetic ; *Recombination, Genetic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Molecular identification of a eukaryotic, stretch-activated nonselective cation channel (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-07
    Description: Calcium-permeable, stretch-activated nonselective cation (SA Cat) channels mediate cellular responses to mechanical stimuli. However, genes encoding such channels have not been identified in eukaryotes. The yeast MID1 gene product (Mid1) is required for calcium influx in the yeast Saccharomyces cerevisiae. Functional expression of Mid1 in Chinese hamster ovary cells conferred sensitivity to mechanical stress that resulted in increases in both calcium conductance and the concentration of cytosolic free calcium. These increases were dependent on the presence of extracellular calcium and were reduced by gadolinium, a blocker of SA Cat channels. Single-channel analyses with cell-attached patches revealed that Mid1 acts as a calcium-permeable, cation-selective stretch-activated channel with a conductance of 32 picosiemens at 150 millimolar cesium chloride in the pipette. Thus, Mid1 appears to be a eukaryotic, SA Cat channel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kanzaki, M -- Nagasawa, M -- Kojima, I -- Sato, C -- Naruse, K -- Sokabe, M -- Iida, H -- New York, N.Y. -- Science. 1999 Aug 6;285(5429):882-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cell Biology, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma 371-8510, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10436155" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; CHO Cells ; Calcium/metabolism ; Calcium Channels/chemistry/genetics/*metabolism ; Cations/*metabolism ; Cell Membrane/metabolism ; Cell Membrane Permeability ; Cesium/metabolism ; Chlorides/pharmacology ; Cricetinae ; Fungal Proteins/chemistry/genetics/*metabolism ; Gadolinium/pharmacology ; Ion Channels/chemistry/genetics/*metabolism ; Membrane Glycoproteins/chemistry/genetics/*metabolism ; Membrane Potentials ; Molecular Sequence Data ; Patch-Clamp Techniques ; Pressure ; Saccharomyces cerevisiae/genetics/metabolism ; *Saccharomyces cerevisiae Proteins ; Stress, Mechanical ; Transfection ; Zinc Compounds/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Mycolactone: a polyketide toxin from Mycobacterium ulcerans required for virulence (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-05
    Description: Mycobacterium ulcerans is the causative agent of Buruli ulcer, a severe human skin disease that occurs primarily in Africa and Australia. Infection with M. ulcerans results in persistent severe necrosis without an acute inflammatory response. The presence of histopathological changes distant from the site of infection suggested that pathogenesis might be toxin mediated. A polyketide-derived macrolide designated mycolactone was isolated that causes cytopathicity and cell cycle arrest in cultured L929 murine fibroblasts. Intradermal inoculation of purified toxin into guinea pigs produced a lesion similar to that of Buruli ulcer in humans. This toxin may represent one of a family of virulence factors associated with pathology in mycobacterial diseases such as leprosy and tuberculosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉George, K M -- Chatterjee, D -- Gunawardana, G -- Welty, D -- Hayman, J -- Lee, R -- Small, P L -- New York, N.Y. -- Science. 1999 Feb 5;283(5403):854-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9933171" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Toxins/chemistry/*isolation & purification/*toxicity ; Cell Cycle/drug effects ; Chromatography, High Pressure Liquid ; Chromatography, Thin Layer ; Female ; Guinea Pigs ; L Cells (Cell Line) ; Macrolides ; Mass Spectrometry ; Mice ; Mycobacterium Infections, Nontuberculous/microbiology/pathology ; Mycobacterium ulcerans/chemistry/*pathogenicity ; Necrosis ; Skin/microbiology/pathology ; Skin Diseases, Bacterial/microbiology/pathology ; Virulence
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    UDP-GlcNAc 2-epimerase: a regulator of cell surface sialylation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: Modification of cell surface molecules with sialic acid is crucial for their function in many biological processes, including cell adhesion and signal transduction. Uridine diphosphate-N-acetylglucosamine 2-epimerase (UDP-GlcNAc 2-epimerase) is an enzyme that catalyzes an early, rate-limiting step in the sialic acid biosynthetic pathway. UDP-GlcNAc 2-epimerase was found to be a major determinant of cell surface sialylation in human hematopoietic cell lines and a critical regulator of the function of specific cell surface adhesion molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keppler, O T -- Hinderlich, S -- Langner, J -- Schwartz-Albiez, R -- Reutter, W -- Pawlita, M -- New York, N.Y. -- Science. 1999 May 21;284(5418):1372-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Applied Tumor Virology Program, Tumor Immunology Program, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/metabolism ; Antigens, CD14/biosynthesis ; Antigens, CD15/biosynthesis ; Antigens, Differentiation, B-Lymphocyte/metabolism ; Carbohydrate Epimerases/genetics/metabolism ; Cell Adhesion Molecules/metabolism ; Cell Membrane/*metabolism ; Culture Media ; *Escherichia coli Proteins ; Glycoconjugates/*metabolism ; HL-60 Cells ; Histocompatibility Antigens Class I/biosynthesis ; Humans ; Lectins/metabolism ; Oligosaccharides/biosynthesis ; Rats ; Sialic Acid Binding Ig-like Lectin 2 ; Sialic Acids/*biosynthesis ; Transcription, Genetic ; Transfection ; Tumor Cells, Cultured
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Light-dependent sequestration of TIMELESS by CRYPTOCHROME (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Most organisms have circadian clocks consisting of negative feedback loops of gene regulation that facilitate adaptation to cycles of light and darkness. In this study, CRYPTOCHROME (CRY), a protein involved in circadian photoperception in Drosophila, is shown to block the function of PERIOD/TIMELESS (PER/TIM) heterodimeric complexes in a light-dependent fashion. TIM degradation does not occur under these conditions; thus, TIM degradation is uncoupled from abrogation of its function by light. CRY and TIM are part of the same complex and directly interact in yeast in a light-dependent fashion. PER/TIM and CRY influence the subcellular distribution of these protein complexes, which reside primarily in the nucleus after the perception of a light signal. Thus, CRY acts as a circadian photoreceptor by directly interacting with core components of the circadian clock.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ceriani, M F -- Darlington, T K -- Staknis, D -- Mas, P -- Petti, A A -- Weitz, C J -- Kay, S A -- MH-51573/MH/NIMH NIH HHS/ -- MH-59943/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):553-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and NSF Center for Biological Timing, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417378" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Clocks ; Cell Line ; Cell Nucleus/metabolism ; *Circadian Rhythm ; Cryptochromes ; Cytoplasm/metabolism ; Darkness ; Dimerization ; Drosophila ; *Drosophila Proteins ; *Eye Proteins ; Flavoproteins/genetics/*metabolism ; Green Fluorescent Proteins ; Insect Proteins/genetics/*metabolism ; *Light ; Luminescent Proteins ; Mutation ; Nuclear Proteins/genetics/metabolism ; Period Circadian Proteins ; *Photoreceptor Cells, Invertebrate ; Receptors, G-Protein-Coupled ; Recombinant Fusion Proteins/metabolism ; Transfection ; Yeasts/genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Early neocortical regionalization in the absence of thalamic innervation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-07
    Description: There is a long-standing controversy regarding the mechanisms that generate the functional subdivisions of the cerebral neocortex. One model proposes that thalamic axonal input specifies these subdivisions; the competing model postulates that patterning mechanisms intrinsic to the dorsal telencephalon generate neocortical regions. Gbx-2 mutant mice, whose thalamic differentiation is disrupted, were investigated. Despite the lack of cortical innervation by thalamic axons, neocortical region-specific gene expression (Cadherin-6, EphA-7, Id-2, and RZR-beta) developed normally. This provides evidence that patterning mechanisms intrinsic to the neocortex specify the basic organization of its functional subdivisions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miyashita-Lin, E M -- Hevner, R -- Wassarman, K M -- Martinez, S -- Rubenstein, J L -- NS34661-01A1/NS/NINDS NIH HHS/ -- R01 MH49428-01/MH/NIMH NIH HHS/ -- R01 MH51561-01A1/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Aug 6;285(5429):906-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nina Ireland Laboratory of Developmental Neurobiology, Department of Psychiatry, School of Medicine, University of California San Francisco, San Francisco, CA 94143-0984, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10436162" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/chemistry/*physiology ; Cadherins/genetics ; Calbindin 2 ; Carbocyanines ; DNA-Binding Proteins/genetics ; Gene Expression ; Homeodomain Proteins/genetics/physiology ; Immunohistochemistry ; In Situ Hybridization ; Inhibitor of Differentiation Proteins ; Lymphoid Enhancer-Binding Factor 1 ; Mice ; Mutation ; Neocortex/anatomy & histology/*embryology/growth & development/metabolism ; Nerve Fibers/physiology/ultrastructure ; Proteins/genetics ; Receptors, Cell Surface/genetics ; Receptors, Cytoplasmic and Nuclear/genetics ; Receptors, Melatonin ; S100 Calcium Binding Protein G/analysis ; Steroid 17-alpha-Hydroxylase/analysis ; Telencephalon/embryology/growth & development/physiology ; Thalamus/anatomy & histology/*embryology/growth & development/metabolism ; Transcription Factors/genetics
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    Cholesterol-lowering drugs may boost bones (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1825-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610568" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anticholesteremic Agents/*pharmacology ; Bone Density/*drug effects ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/biosynthesis ; Clinical Trials as Topic ; Female ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/*pharmacology ; Lovastatin/*pharmacology ; Mice ; Osteogenesis/*drug effects ; Osteoporosis/drug therapy ; Rats ; Simvastatin/pharmacology ; *Transforming Growth Factor beta
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Developmental biology. How to get a heart in the right place (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):23.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428692" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Patterning ; Cilia/*physiology ; *Embryonic and Fetal Development ; Heart/*embryology ; Humans ; Mice ; Mice, Knockout
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    Harnessing the power of stem cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1432-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10206866" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Differentiation ; Cell Lineage ; Cells, Cultured ; Embryo, Mammalian/cytology ; Endoderm/cytology ; Hematopoietic Stem Cells/cytology ; Humans ; Mesoderm/cytology ; Neurons/cytology ; Stem Cells/*cytology/physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    New findings reveal how legs take wing (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Mar 12;283(5408):1615-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10189311" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Avian Proteins ; Body Patterning ; Chick Embryo ; Forelimb/*embryology/metabolism ; *Gene Expression Regulation, Developmental ; Hindlimb/*embryology/metabolism ; Homeodomain Proteins/genetics/*physiology ; Mice ; Muscle, Skeletal/embryology ; Paired Box Transcription Factors ; *T-Box Domain Proteins ; Transcription Factors/genetics/*physiology ; Wings, Animal/*embryology/metabolism
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    Transduction of human CD34+ cells that mediate long-term engraftment of NOD/SCID mice by HIV vectors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-29
    Description: Efficient gene transfer into human hematopoietic stem cells (HSCs) is an important goal in the study of the hematopoietic system as well as for gene therapy of hematopoietic disorders. A lentiviral vector based on the human immunodeficiency virus (HIV) was able to transduce human CD34+ cells capable of stable, long-term reconstitution of nonobese diabetic/severe combined immunodeficient (NOD/SCID) mice. High-efficiency transduction occurred in the absence of cytokine stimulation and resulted in transgene expression in multiple lineages of human hematopoietic cells for up to 22 weeks after transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miyoshi, H -- Smith, K A -- Mosier, D E -- Verma, I M -- Torbett, B E -- CA44360/CA/NCI NIH HHS/ -- DK49886/DK/NIDDK NIH HHS/ -- HL53670/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 29;283(5402):682-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetics, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9924027" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD34/*analysis ; Bone Marrow Cells/cytology ; Cell Division ; Cell Survival ; Colony-Forming Units Assay ; Gene Expression ; *Gene Transfer Techniques ; *Genetic Vectors ; Green Fluorescent Proteins ; HIV/*genetics ; Hematopoiesis ; *Hematopoietic Stem Cell Transplantation ; *Hematopoietic Stem Cells/cytology/immunology ; Humans ; Leukemia Virus, Murine/genetics ; Luminescent Proteins/genetics ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Promoter Regions, Genetic ; Transfection ; Transgenes
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    Viral clearance without destruction of infected cells during acute HBV infection (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-30
    Description: Viral clearance during hepatitis B virus (HBV) infection has been thought to reflect the destruction of infected hepatocytes by CD8(+) T lymphocytes. However, in this study, HBV DNA was shown to largely disappear from the liver and the blood of acutely infected chimpanzees long before the peak of T cell infiltration and most of the liver disease. These results demonstrate that noncytopathic antiviral mechanisms contribute to viral clearance during acute viral hepatitis by purging HBV replicative intermediates from the cytoplasm and covalently closed circular viral DNA from the nucleus of infected cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guidotti, L G -- Rochford, R -- Chung, J -- Shapiro, M -- Purcell, R -- Chisari, F V -- R01 AI20001/AI/NIAID NIH HHS/ -- R01 AI40696/AI/NIAID NIH HHS/ -- R37 CA40489/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):825-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10221919" target="_blank"〉PubMed〈/a〉
    Keywords: Acute Disease ; Animals ; Cytotoxicity, Immunologic ; DNA, Circular/analysis ; DNA, Viral/analysis/blood ; Hepatitis B/*immunology/pathology/virology ; Hepatitis B Antibodies/blood ; Hepatitis B Core Antigens/analysis ; Hepatitis B virus/genetics/*immunology/isolation & purification/physiology ; Killer Cells, Natural/immunology ; Liver/immunology/pathology/*virology ; Mice ; Mice, Transgenic ; Pan troglodytes ; T-Lymphocytes/immunology ; Time Factors ; Virus Replication
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    HIV vaccines. Magic of the occult? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Montefiori, D -- Moore, J P -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):336-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for AIDS Research, Department of Surgery, Duke University Medical Center, Durham, NC 27710, USA. monte005@mc.duke.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9925493" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines/*immunology ; Animals ; COS Cells ; Cell Fusion ; Coculture Techniques ; Epitopes/immunology ; HIV Antibodies/biosynthesis/*immunology ; HIV Antigens/*immunology ; HIV Envelope Protein gp120/immunology ; HIV Envelope Protein gp41/immunology ; HIV-1/*immunology/physiology ; Mice ; Neutralization Tests ; Transfection ; Tumor Cells, Cultured
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Mouse models of tumor development in neurofibromatosis type 1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: Neurofibromatosis type 1 (NF1) is a prevalent familial cancer syndrome resulting from germ line mutations in the NF1 tumor suppressor gene. Hallmark features of the disease are the development of benign peripheral nerve sheath tumors (neurofibromas), which can progress to malignancy. Unlike humans, mice that are heterozygous for a mutation in Nf1 do not develop neurofibromas. However, as described here, chimeric mice composed in part of Nf1-/- cells do, which demonstrates that loss of the wild-type Nf1 allele is rate-limiting in tumor formation. In addition, mice that carry linked germ line mutations in Nf1 and p53 develop malignant peripheral nerve sheath tumors (MPNSTs), which supports a cooperative and causal role for p53 mutations in MPNST development. These two mouse models provide the means to address fundamental aspects of disease development and to test therapeutic strategies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cichowski, K -- Shih, T S -- Schmitt, E -- Santiago, S -- Reilly, K -- McLaughlin, M E -- Bronson, R T -- Jacks, T -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2172-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Center for Cancer Research and Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591652" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chimera ; *Disease Models, Animal ; Female ; *Genes, Neurofibromatosis 1 ; Genes, p53 ; Germ-Line Mutation ; Humans ; Loss of Heterozygosity ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mutation ; Nerve Sheath Neoplasms/*genetics/*pathology ; Nerve Tissue Proteins/analysis/physiology ; Neurofibromatosis 1/*genetics/*pathology ; Neurofibromin 1 ; Proteins/analysis/physiology ; S100 Proteins/analysis ; Schwann Cells/chemistry/ultrastructure ; Stem Cells
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    GAD, a single autoantigen for diabetes (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉von Boehmer, H -- Sarukhan, A -- New York, N.Y. -- Science. 1999 May 14;284(5417):1135, 1137.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉INSERM U373, Faculte Necker, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10366347" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoantigens/genetics/*immunology/physiology ; DNA, Antisense ; Diabetes Mellitus, Type 1/enzymology/*immunology/therapy ; Glutamate Decarboxylase/genetics/*immunology/physiology ; Humans ; Islets of Langerhans/*enzymology/immunology ; Lymphocyte Activation ; Mice ; Mice, Inbred NOD ; Mice, Transgenic ; Self Tolerance ; T-Lymphocytes/immunology ; Transgenes
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 141
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    Modulation of respiratory frequency by peptidergic input to rhythmogenic neurons in the preBotzinger complex (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-24
    Description: Neurokinin-1 receptor (NK1R) and mu-opioid receptor (muOR) agonists affected respiratory rhythm when injected directly into the preBotzinger Complex (preBotC), the hypothesized site for respiratory rhythmogenesis in mammals. These effects were mediated by actions on preBotC rhythmogenic neurons. The distribution of NK1R+ neurons anatomically defined the preBotC. Type 1 neurons in the preBotC, which have rhythmogenic properties, expressed both NK1Rs and muORs, whereas type 2 neurons expressed only NK1Rs. These findings suggest that the preBotC is a definable anatomic structure with unique physiological function and that a subpopulation of neurons expressing both NK1Rs and muORs generate respiratory rhythm and modulate respiratory frequency.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811082/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811082/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gray, P A -- Rekling, J C -- Bocchiaro, C M -- Feldman, J L -- HL37941/HL/NHLBI NIH HHS/ -- HL40959/HL/NHLBI NIH HHS/ -- R01 HL040959/HL/NHLBI NIH HHS/ -- R01 HL040959-12/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1566-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, University of California Los Angeles, Box 951763, Los Angeles, CA 90095-1763, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10567264" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Enkephalin, Ala(2)-MePhe(4)-Gly(5)-/pharmacology ; Female ; In Vitro Techniques ; Medulla Oblongata/cytology/drug effects/*physiology ; Mice ; Mice, Inbred BALB C ; Neurons/chemistry/drug effects/*physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, GABA-B/analysis/physiology ; Receptors, Neurokinin-1/agonists/analysis/*physiology ; Receptors, Opioid, mu/agonists/analysis/*physiology ; Respiratory Mechanics/drug effects/*physiology ; Substance P/pharmacology ; Synaptic Transmission/drug effects
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 142
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    Requirement for Tec kinases Rlk and Itk in T cell receptor signaling and immunity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: T cell receptor (TCR) signaling requires activation of Zap-70 and Src family tyrosine kinases, but requirements for other tyrosine kinases are less clear. Combined deletion in mice of two Tec kinases, Rlk and Itk, caused marked defects in TCR responses including proliferation, cytokine production, and apoptosis in vitro and adaptive immune responses to Toxoplasma gondii in vivo. Molecular events immediately downstream from the TCR were intact in rlk-/-itk-/- cells, but intermediate events including inositol trisphosphate production, calcium mobilization, and mitogen-activated protein kinase activation were impaired, establishing Tec kinases as critical regulators of TCR signaling required for phospholipase C-gamma activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schaeffer, E M -- Debnath, J -- Yap, G -- McVicar, D -- Liao, X C -- Littman, D R -- Sher, A -- Varmus, H E -- Lenardo, M J -- Schwartzberg, P L -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):638-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Human Genome Research Institute, National Cancer Institute, National Institute for Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10213685" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; CD4-CD8 Ratio ; Calcium Signaling ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Diglycerides/metabolism ; Gene Targeting ; Inositol Phosphates/metabolism ; Interferon-gamma/biosynthesis ; Interleukin-2/biosynthesis/pharmacology ; Isoenzymes/metabolism ; Killer Cells, Natural/immunology ; Lymphocyte Activation ; Mice ; Mutation ; Phospholipase C gamma ; Phosphorylation ; Protein-Tyrosine Kinases/genetics/*metabolism ; Receptors, Antigen, T-Cell/*metabolism ; *Signal Transduction ; T-Lymphocytes/*enzymology/*immunology ; Toxoplasmosis, Animal/immunology ; Type C Phospholipases/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 143
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    Light-independent role of CRY1 and CRY2 in the mammalian circadian clock (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: Cryptochrome (CRY), a photoreceptor for the circadian clock in Drosophila, binds to the clock component TIM in a light-dependent fashion and blocks its function. In mammals, genetic evidence suggests a role for CRYs within the clock, distinct from hypothetical photoreceptor functions. Mammalian CRY1 and CRY2 are here shown to act as light-independent inhibitors of CLOCK-BMAL1, the activator driving Per1 transcription. CRY1 or CRY2 (or both) showed light-independent interactions with CLOCK and BMAL1, as well as with PER1, PER2, and TIM. Thus, mammalian CRYs act as light-independent components of the circadian clock and probably regulate Per1 transcriptional cycling by contacting both the activator and its feedback inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Griffin, E A Jr -- Staknis, D -- Weitz, C J -- MH-59943/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):768-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, Boston, MA 02115 USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531061" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; ARNTL Transcription Factors ; Animals ; Basic Helix-Loop-Helix Transcription Factors ; *Biological Clocks ; CLOCK Proteins ; Cell Cycle Proteins ; Cells, Cultured ; *Circadian Rhythm ; Cryptochromes ; Dimerization ; *Drosophila Proteins ; *Eye Proteins ; Flavoproteins/metabolism/*physiology ; *Gene Expression Regulation ; Genes, Reporter ; Helix-Loop-Helix Motifs ; Humans ; Intracellular Signaling Peptides and Proteins ; *Light ; Mice ; Nuclear Proteins/antagonists & inhibitors/*genetics/metabolism ; Period Circadian Proteins ; *Photoreceptor Cells, Invertebrate ; Receptors, G-Protein-Coupled ; Trans-Activators/antagonists & inhibitors/metabolism ; Transcription Factors/antagonists & inhibitors/metabolism ; Transcriptional Activation ; Transfection
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 144
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    Functional human corneal equivalents constructed from cell lines (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: Human corneal equivalents comprising the three main layers of the cornea (epithelium, stroma, and endothelium) were constructed. Each cellular layer was fabricated from immortalized human corneal cells that were screened for use on the basis of morphological, biochemical, and electrophysiological similarity to their natural counterparts. The resulting corneal equivalents mimicked human corneas in key physical and physiological functions, including morphology, biochemical marker expression, transparency, ion and fluid transport, and gene expression. Morphological and functional equivalents to human corneas that can be produced in vitro have immediate applications in toxicity and drug efficacy testing, and form the basis for future development of implantable tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Griffith, M -- Osborne, R -- Munger, R -- Xiong, X -- Doillon, C J -- Laycock, N L -- Hakim, M -- Song, Y -- Watsky, M A -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2169-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Ottawa Eye Institute and Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa Hospital-General Campus, Ottawa, Ontario K1H 8L6, Canada. mgriffith@ogh.on.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591651" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Testing Alternatives ; *Biomedical Engineering ; Cell Line ; Cells, Cultured ; Chondroitin Sulfates ; Collagen ; *Cornea/cytology/growth & development/physiology ; Corneal Opacity/chemically induced ; Corneal Stroma/cytology/growth & development/physiology ; Corneal Transplantation ; Cross-Linking Reagents ; *Culture Techniques ; Electrophysiology ; Endothelium, Corneal/cytology/growth & development ; Epithelium, Corneal/cytology/growth & development ; Gene Expression ; Glutaral ; Humans ; Ion Channels ; Ouabain/pharmacology ; Patch-Clamp Techniques ; Sodium Dodecyl Sulfate/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 145
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    Mitochondrial diseases in man and mouse (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-05
    Description: Over the past 10 years, mitochondrial defects have been implicated in a wide variety of degenerative diseases, aging, and cancer. Studies on patients with these diseases have revealed much about the complexities of mitochondrial genetics, which involves an interplay between mutations in the mitochondrial and nuclear genomes. However, the pathophysiology of mitochondrial diseases has remained perplexing. The essential role of mitochondrial oxidative phosphorylation in cellular energy production, the generation of reactive oxygen species, and the initiation of apoptosis has suggested a number of novel mechanisms for mitochondrial pathology. The importance and interrelationship of these functions are now being studied in mouse models of mitochondrial disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, D C -- AG13154/AG/NIA NIH HHS/ -- HL45572/HL/NHLBI NIH HHS/ -- NS21328/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1482-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular Medicine, Emory University, 1462 Clifton Road, Suite 420, Atlanta, GA 30322, USA. dwallace@gmm.gen.emory.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10066162" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics ; Animals ; DNA, Mitochondrial/*genetics ; Humans ; Metabolic Diseases/*genetics/metabolism ; Mice ; Mitochondria/*genetics/metabolism ; Mitochondrial Myopathies/*genetics/metabolism ; Mutation ; Neoplasms/genetics/metabolism ; Oxidative Phosphorylation
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  • 146
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    Activity-induced potentiation of developing neuromuscular synapses (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-11
    Description: Electrical activity plays a critical role in shaping the structure and function of synaptic connections in the nervous system. In Xenopus nerve-muscle cultures, a brief burst of action potentials in the presynaptic neuron induced a persistent potentiation of neuromuscular synapses that exhibit immature synaptic functions. Induction of potentiation required an elevation of postsynaptic Ca2+ and expression of potentiation appeared to involve an increased probability of transmitter secretion from the presynaptic nerve terminal. Thus, activity-dependent persistent synaptic enhancement may reflect properties characteristic of immature synaptic connections, and bursting activity in developing spinal neurons may promote functional maturation of the neuromuscular synapse.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wan, J -- Poo, M -- NS22764/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 10;285(5434):1725-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California at San Diego, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10481007" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Bungarotoxins/pharmacology ; Calcineurin/physiology ; Calcineurin Inhibitors ; Calcium/metabolism ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/antagonists & inhibitors/metabolism ; Cells, Cultured ; Chelating Agents/pharmacology ; Egtazic Acid/analogs & derivatives/pharmacology ; Electric Stimulation ; *Excitatory Postsynaptic Potentials/drug effects ; Long-Term Potentiation ; Motor Neurons/*physiology ; Neuromuscular Junction/drug effects/*physiology ; *Neuronal Plasticity/drug effects ; Patch-Clamp Techniques ; Receptors, Cholinergic/physiology ; Spinal Cord ; *Synaptic Transmission ; Xenopus
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  • 147
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    CD1d-restricted immunoglobulin G formation to GPI-anchored antigens mediated by NKT cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-08
    Description: Immunoglobulin G (IgG) responses require major histocompatibility complex (MHC)-restricted recognition of peptide fragments by conventional CD4(+) helper T cells. Immunoglobulin G responses to glycosylphosphatidylinositol (GPI)- anchored protein antigens, however, were found to be regulated in part through CD1d-restricted recognition of the GPI moiety by thymus-dependent, interleukin-4-producing CD4(+), natural killer cell antigen 1.1 [(NK1.1)+] helper T cells. The CD1-NKT cell pathway regulated immunogobulin G responses to the GPI-anchored surface antigens of Plasmodium and Trypanosoma and may be a general mechanism for rapid, MHC-unrestricted antibody responses to diverse pathogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schofield, L -- McConville, M J -- Hansen, D -- Campbell, A S -- Fraser-Reid, B -- Grusby, M J -- Tachado, S D -- AI-40171/AI/NIAID NIH HHS/ -- GM 41071/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 8;283(5399):225-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Walter and Eliza Hall Institute of Medical Research, Post Office, Royal Melbourne Hospital, Victoria 3050, Australia. schofield@wehi.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9880256" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigen-Presenting Cells/immunology ; Antigens/analysis ; Antigens, CD1/*immunology ; Antigens, Ly ; Antigens, Protozoan/*immunology ; Antigens, Surface ; Cells, Cultured ; Glycosylphosphatidylinositols/*immunology ; Immunoglobulin G/*biosynthesis ; Interleukin-4/biosynthesis ; Lectins, C-Type ; Leishmania mexicana/immunology ; Major Histocompatibility Complex ; Mice ; Mice, Inbred Strains ; NK Cell Lectin-Like Receptor Subfamily B ; Plasmodium/immunology ; Proteins/analysis ; Protozoan Proteins/immunology ; T-Lymphocyte Subsets/*immunology ; T-Lymphocytes, Helper-Inducer/*immunology ; Trypanosoma brucei brucei/immunology ; Variant Surface Glycoproteins, Trypanosoma/immunology
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  • 148
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    HMG-1 as a late mediator of endotoxin lethality in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-10
    Description: Endotoxin, a constituent of Gram-negative bacteria, stimulates macrophages to release large quantities of tumor necrosis factor (TNF) and interleukin-1 (IL-1), which can precipitate tissue injury and lethal shock (endotoxemia). Antagonists of TNF and IL-1 have shown limited efficacy in clinical trials, possibly because these cytokines are early mediators in pathogenesis. Here a potential late mediator of lethality is identified and characterized in a mouse model. High mobility group-1 (HMG-1) protein was found to be released by cultured macrophages more than 8 hours after stimulation with endotoxin, TNF, or IL-1. Mice showed increased serum levels of HMG-1 from 8 to 32 hours after endotoxin exposure. Delayed administration of antibodies to HMG-1 attenuated endotoxin lethality in mice, and administration of HMG-1 itself was lethal. Septic patients who succumbed to infection had increased serum HMG-1 levels, suggesting that this protein warrants investigation as a therapeutic target.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, H -- Bloom, O -- Zhang, M -- Vishnubhakat, J M -- Ombrellino, M -- Che, J -- Frazier, A -- Yang, H -- Ivanova, S -- Borovikova, L -- Manogue, K R -- Faist, E -- Abraham, E -- Andersson, J -- Andersson, U -- Molina, P E -- Abumrad, N N -- Sama, A -- Tracey, K J -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):248-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Emergency Medicine and Department of Surgery, North Shore University Hospital-New York University School of Medicine, Manhasset, NY 11030, USA. hwang@picower.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398600" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteremia/*blood ; Carrier Proteins/genetics/immunology/*metabolism/toxicity ; Cell Line ; Cells, Cultured ; Endotoxemia/*blood ; Endotoxins/blood/*toxicity ; HMGB1 Protein ; High Mobility Group Proteins/genetics/immunology/*metabolism/toxicity ; Humans ; Immune Sera/immunology ; Immunization, Passive ; Interferon-gamma/pharmacology ; Interleukin-1/pharmacology ; Lethal Dose 50 ; Leukocytes, Mononuclear/metabolism ; Lipopolysaccharides/toxicity ; Macrophages/*metabolism ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C3H ; RNA, Messenger/genetics/metabolism ; Time Factors ; Tumor Necrosis Factor-alpha/pharmacology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 149
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    Ca2+-induced apoptosis through calcineurin dephosphorylation of BAD (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-09
    Description: The Ca2+-activated protein phosphatase calcineurin induces apoptosis, but the mechanism is unknown. Calcineurin was found to dephosphorylate BAD, a pro-apoptotic member of the Bcl-2 family, thus enhancing BAD heterodimerization with Bcl-xL and promoting apoptosis. The Ca2+-induced dephosphorylation of BAD correlated with its dissociation from 14-3-3 in the cytosol and translocation to mitochondria where Bcl-xL resides. In hippocampal neurons, L-glutamate, an inducer of Ca2+ influx and calcineurin activation, triggered mitochondrial targeting of BAD and apoptosis, which were both suppressible by coexpression of a dominant-inhibitory mutant of calcineurin or pharmacological inhibitors of this phosphatase. Thus, a Ca2+-inducible mechanism for apoptosis induction operates by regulating BAD phosphorylation and localization in cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, H G -- Pathan, N -- Ethell, I M -- Krajewski, S -- Yamaguchi, Y -- Shibasaki, F -- McKeon, F -- Bobo, T -- Franke, T F -- Reed, J C -- AG-1593/AG/NIA NIH HHS/ -- CA-69381/CA/NCI NIH HHS/ -- HD25938/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):339-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195903" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Animals ; *Apoptosis ; Calcineurin/genetics/*metabolism ; Calcineurin Inhibitors ; Calcium/*metabolism/pharmacology ; Carrier Proteins/chemistry/*metabolism ; Cell Line ; Cells, Cultured ; Dimerization ; Enzyme Inhibitors/pharmacology ; Glutamic Acid/pharmacology ; Hippocampus/cytology ; Humans ; Mitochondria/metabolism ; Neurons/cytology/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/metabolism ; Proteins/metabolism ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Rats ; Recombinant Fusion Proteins/metabolism ; Transfection ; *Tyrosine 3-Monooxygenase ; bcl-Associated Death Protein ; bcl-X Protein
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    Gene defect linked to Rett syndrome (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):27.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10532886" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosomal Proteins, Non-Histone ; Chromosome Mapping ; DNA-Binding Proteins/*genetics ; Female ; *Gene Expression Regulation ; Humans ; Male ; Methyl-CpG-Binding Protein 2 ; Mice ; Mice, Knockout ; Mutation ; Repressor Proteins/*genetics ; Rett Syndrome/*genetics ; X Chromosome/*genetics
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    A chemical inhibitor of p53 that protects mice from the side effects of cancer therapy (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-11
    Description: Chemotherapy and radiation therapy for cancer often have severe side effects that limit their efficacy. Because these effects are in part determined by p53-mediated apoptosis, temporary suppression of p53 has been suggested as a therapeutic strategy to prevent damage of normal tissues during treatment of p53-deficient tumors. To test this possibility, a small molecule was isolated for its ability to reversibly block p53-dependent transcriptional activation and apoptosis. This compound, pifithrin-alpha, protected mice from the lethal genotoxic stress associated with anticancer treatment without promoting the formation of tumors. Thus, inhibitors of p53 may be useful drugs for reducing the side effects of cancer therapy and other types of stress associated with p53 induction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Komarov, P G -- Komarova, E A -- Kondratov, R V -- Christov-Tselkov, K -- Coon, J S -- Chernov, M V -- Gudkov, A V -- CA60730/CA/NCI NIH HHS/ -- CA75179/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 10;285(5434):1733-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics, University of Illinois at Chicago, Chicago, IL 60607, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10481009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/*adverse effects/pharmacology ; Apoptosis/*drug effects ; Benzothiazoles ; Cell Division/drug effects ; Cell Line ; Cell Nucleus/drug effects/metabolism ; Cytoplasm/drug effects/metabolism ; DNA/biosynthesis ; DNA Damage ; G2 Phase/drug effects ; Gamma Rays/*adverse effects ; Humans ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Nude ; Neoplasms/drug therapy/radiotherapy/*therapy ; Radiation Tolerance/*drug effects ; Thiazoles/*pharmacology ; Time Factors ; Toluene/*analogs & derivatives/pharmacology ; Tumor Cells, Cultured ; Tumor Suppressor Protein p53/*antagonists & inhibitors/physiology ; Ultraviolet Rays/adverse effects
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    Cloning genes encoding MHC class II-restricted antigens: mutated CDC27 as a tumor antigen (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: In an effort to identify tumor-specific antigens recognized by CD4(+) T cells, an approach was developed that allows the screening of an invariant chain-complementary DNA fusion library in a genetically engineered cell line expressing the essential components of the major histocompatibility complex (MHC) class II processing and presentation pathway. This led to the identification of a mutated form of human CDC27, which gave rise to an HLA-DR4-restricted melanoma antigen. A mutated form of triosephosphate isomerase, isolated by a biochemical method, was also identified as an HLA-DR1-restricted antigen. Thus, this approach may be generally applicable to the identification of antigens recognized by CD4(+) T cells, which could aid the development of strategies for the treatment of patients with cancer, autoimmune diseases, or infectious diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, R F -- Wang, X -- Atwood, A C -- Topalian, S L -- Rosenberg, S A -- New York, N.Y. -- Science. 1999 May 21;284(5418):1351-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Surgery Branch, National Cancer Institute, National Institutes of Health, Building 10/2B42, 9000 Rockville Pike, Bethesda, MD 20892, USA. rongfu@pop.nci.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334988" target="_blank"〉PubMed〈/a〉
    Keywords: Antigen Presentation ; Antigens, Differentiation, B-Lymphocyte/genetics/immunology ; Antigens, Neoplasm/*immunology ; Apc3 Subunit, Anaphase-Promoting Complex-Cyclosome ; CD4-Positive T-Lymphocytes/immunology ; Cell Cycle Proteins/*genetics/*immunology ; Cell Line, Transformed ; *Cloning, Molecular ; Epitopes/immunology ; HLA-DR1 Antigen/immunology ; HLA-DR4 Antigen/immunology ; Histocompatibility Antigens Class II/genetics/*immunology ; Humans ; Lymphocytes, Tumor-Infiltrating/*immunology ; Melanoma/immunology ; Point Mutation ; Recombinant Fusion Proteins ; Transfection ; Triose-Phosphate Isomerase/genetics/immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    In vivo protein transduction: delivery of a biologically active protein into the mouse (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-08
    Description: Delivery of therapeutic proteins into tissues and across the blood-brain barrier is severely limited by the size and biochemical properties of the proteins. Here it is shown that intraperitoneal injection of the 120-kilodalton beta-galactosidase protein, fused to the protein transduction domain from the human immunodeficiency virus TAT protein, results in delivery of the biologically active fusion protein to all tissues in mice, including the brain. These results open new possibilities for direct delivery of proteins into patients in the context of protein therapy, as well as for epigenetic experimentation with model organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwarze, S R -- Ho, A -- Vocero-Akbani, A -- Dowdy, S F -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1569-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477521" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood-Brain Barrier ; Brain/metabolism ; Cell Membrane/metabolism ; Drug Carriers ; *Drug Delivery Systems ; Fluorescein-5-isothiocyanate ; Gene Products, tat/administration & dosage/*metabolism ; Humans ; Injections, Intraperitoneal ; Jurkat Cells ; Lipid Bilayers ; Mice ; Mice, Inbred C57BL ; Microscopy, Confocal ; Microscopy, Fluorescence ; Muscle, Skeletal/metabolism ; Recombinant Fusion Proteins/administration & dosage/*metabolism ; Spleen/metabolism ; Tissue Distribution ; Tumor Cells, Cultured ; beta-Galactosidase/administration & dosage/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 154
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    Stimulation of bone formation in vitro and in rodents by statins (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-03
    Description: Osteoporosis and other diseases of bone loss are a major public health problem. Here it is shown that the statins, drugs widely used for lowering serum cholesterol, also enhance new bone formation in vitro and in rodents. This effect was associated with increased expression of the bone morphogenetic protein-2 (BMP-2) gene in bone cells. Lovastatin and simvastatin increased bone formation when injected subcutaneously over the calvaria of mice and increased cancellous bone volume when orally administered to rats. Thus, in appropriate doses, statins may have therapeutic applications for the treatment of osteoporosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mundy, G -- Garrett, R -- Harris, S -- Chan, J -- Chen, D -- Rossini, G -- Boyce, B -- Zhao, M -- Gutierrez, G -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1946-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉OsteoScreen, 2040 Babcock Road, San Antonio, TX 78229, USA. mundy@uthscsa.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10583956" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Density/*drug effects ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/biosynthesis/genetics/pharmacology ; Cell Line ; Female ; Fibroblast Growth Factor 1 ; Fibroblast Growth Factor 2/pharmacology ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/pharmacology ; Lovastatin/*pharmacology ; Male ; Mice ; Mice, Inbred ICR ; Organ Culture Techniques ; Osteoblasts/*drug effects/metabolism ; Osteoclasts/drug effects ; Osteogenesis/*drug effects ; Osteoporosis/drug therapy ; Ovariectomy ; Promoter Regions, Genetic/drug effects ; Rats ; Recombinant Proteins/pharmacology ; Simvastatin/*pharmacology ; Skull ; Transfection ; *Transforming Growth Factor beta
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    Persistence of memory CD8 T cells in MHC class I-deficient mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-13
    Description: An understanding of how T cell memory is maintained is crucial for the rational design of vaccines. Memory T cells were shown to persist indefinitely in major histocompatibility complex (MHC) class I-deficient mice and retained the ability to make rapid cytokine responses upon reencounter with antigen. In addition, memory CD8 T cells, unlike naive cells, divided without MHC-T cell receptor interactions. This "homeostatic" proliferation is likely to be important in maintaining memory T cell numbers in the periphery. Thus, after naive CD8 T cells differentiate into memory cells, they evolve an MHC class I-independent "life-style" and do not require further stimulation with specific or cross-reactive antigen for their maintenance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murali-Krishna, K -- Lau, L L -- Sambhara, S -- Lemonnier, F -- Altman, J -- Ahmed, R -- AI30048/AI/NIAID NIH HHS/ -- NS21496/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1377-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Emory Vaccine Center and Department of Microbiology and Immunology, Emory University, Atlanta, GA 30322, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10558996" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Antigens, CD44/analysis ; Antigens, Viral/immunology ; CD8-Positive T-Lymphocytes/cytology/*immunology ; Cell Division ; Epitopes/immunology ; Histocompatibility Antigens Class I/*immunology ; Homeostasis ; *Immunologic Memory ; Interferon-gamma/biosynthesis ; Lymphocytic Choriomeningitis/immunology ; Lymphocytic choriomeningitis virus/*immunology ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Radiation Chimera ; Receptors, Antigen, T-Cell/immunology ; T-Lymphocyte Subsets/cytology/*immunology ; beta 2-Microglobulin/genetics
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    Seeking ligands for lonely orphan receptors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gustafsson, J A -- New York, N.Y. -- Science. 1999 May 21;284(5418):1285-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Nutrition, Karolinska Institutet, NOVUM Huddinge Hospital, Huddinge, Sweden. jan-ake.gustafsson@mednut.ki.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383308" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bile Acids and Salts/biosynthesis ; Chenodeoxycholic Acid/*metabolism ; Cholesterol/*metabolism ; Cholesterol 7-alpha-Hydroxylase/biosynthesis/*genetics ; Cholic Acid/metabolism ; Cytochrome P-450 Enzyme System/metabolism ; DNA-Binding Proteins/*metabolism ; Fatty Acids/metabolism ; Gene Expression Regulation, Enzymologic ; Homeostasis ; Humans ; Ligands ; Liver/metabolism ; Mice ; Orphan Nuclear Receptors ; Receptors, Cytoplasmic and Nuclear/*metabolism ; Steroid Hydroxylases/metabolism ; Transcription Factors/*metabolism ; Transcription, Genetic
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    New lead found to a possible "insulin pill" (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 1999 May 7;284(5416):886.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10357667" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascomycota/*metabolism ; CHO Cells ; Cricetinae ; Diabetes Mellitus, Type 2/*drug therapy ; Drug Evaluation, Preclinical ; Hypoglycemic Agents/chemistry/isolation & purification/metabolism/*therapeutic ; use ; Indoles/chemistry/isolation & purification/metabolism/*therapeutic use ; Insulin/metabolism/pharmacology ; Mice ; Mice, Mutant Strains ; Receptor, Insulin/metabolism
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    Regulation of beta-catenin signaling by the B56 subunit of protein phosphatase 2A (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-26
    Description: Dysregulation of Wnt-beta-catenin signaling disrupts axis formation in vertebrate embryos and underlies multiple human malignancies. The adenomatous polyposis coli (APC) protein, axin, and glycogen synthase kinase 3beta form a Wnt-regulated signaling complex that mediates the phosphorylation-dependent degradation of beta-catenin. A protein phosphatase 2A (PP2A) regulatory subunit, B56, interacted with APC in the yeast two-hybrid system. Expression of B56 reduced the abundance of beta-catenin and inhibited transcription of beta-catenin target genes in mammalian cells and Xenopus embryo explants. The B56-dependent decrease in beta-catenin was blocked by oncogenic mutations in beta-catenin or APC, and by proteasome inhibitors. B56 may direct PP2A to dephosphorylate specific components of the APC-dependent signaling complex and thereby inhibit Wnt signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seeling, J M -- Miller, J R -- Gil, R -- Moon, R T -- White, R -- Virshup, D M -- 3P30CA42014/CA/NCI NIH HHS/ -- R01 CA71074/CA/NCI NIH HHS/ -- T32CA09602/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Mar 26;283(5410):2089-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84132, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10092233" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli Protein ; Animals ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Cell Line ; Cysteine Endopeptidases/metabolism ; Cysteine Proteinase Inhibitors/pharmacology ; Cytoskeletal Proteins/genetics/*metabolism ; Down-Regulation ; Genes, Reporter ; Glycogen Synthase Kinase 3 ; Glycogen Synthase Kinases ; Humans ; Leupeptins/pharmacology ; Multienzyme Complexes/metabolism ; Mutation ; Phosphoprotein Phosphatases/chemistry/genetics/*metabolism ; Phosphorylation ; Proteasome Endopeptidase Complex ; Protein Phosphatase 2 ; Proto-Oncogene Proteins/*metabolism ; *Signal Transduction ; *Trans-Activators ; Transcriptional Activation ; Transfection ; Tumor Cells, Cultured ; Wnt Proteins ; Xenopus ; Xenopus Proteins ; *Zebrafish Proteins ; beta Catenin
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    Chlamydia protein linked to heart disease (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1238-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10084921" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoimmune Diseases/immunology/microbiology ; Bacterial Proteins/*immunology ; Chlamydia/*immunology/metabolism ; Chlamydia Infections/complications/immunology ; Heart/microbiology ; Humans ; Mice ; *Molecular Mimicry ; Myocarditis/immunology/*microbiology ; Myocardium/*immunology ; Myosins/*immunology ; Peptides/immunology ; T-Lymphocytes/immunology
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  • 160
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    Rapid and reversible effects of activity on acetylcholine receptor density at the neuromuscular junction in vivo (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: Quantitative fluorescence imaging was used to study the regulation of acetylcholine receptor (AChR) number and density at neuromuscular junctions in living adult mice. At fully functional synapses, AChRs have a half-life of about 14 days. However, 2 hours after neurotransmission was blocked, the half-life of the AChRs was now less than a day; the rate was 25 times faster than before. Most of the lost receptors were not quickly replaced. Direct muscle stimulation or restoration of synaptic transmission inhibited this process. AChRs that were removed from nonfunctional synapses resided for hours in the perijunctional membrane before being locally internalized. Dispersed AChRs could also reaggregate at the junction once neurotransmission was restored. The rapid and reversible alterations in AChR density at the neuromuscular junction in vivo parallel changes thought to occur in the central nervous system at synapses undergoing potentiation and depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Akaaboune, M -- Culican, S M -- Turney, S G -- Lichtman, J W -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):503-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, MO 63110, USA. mohammed@nmj.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521340" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bungarotoxins/pharmacology ; Cell Membrane/metabolism ; Curare/pharmacology ; Diffusion ; Electric Stimulation ; Fluorescent Dyes ; Half-Life ; Mice ; *Muscle Contraction ; Muscle Denervation ; Neuromuscular Blockade ; Neuromuscular Blocking Agents/pharmacology ; Neuromuscular Junction/*physiology ; Receptor Aggregation ; Receptors, Cholinergic/*metabolism ; Rhodamines/pharmacology ; *Synaptic Transmission
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    A role for the proteasome in the light response of the timeless clock protein (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-11
    Description: The cyclic expression of the period (PER) and timeless (TIM) proteins is critical for the molecular circadian feedback loop in Drosophila. The entrainment by light of the circadian clock is mediated by a reduction in TIM levels. To elucidate the mechanism of this process, the sensitivity of TIM regulation by light was tested in an in vitro assay with inhibitors of candidate proteolytic pathways. The data suggested that TIM is degraded through a ubiquitin-proteasome mechanism. In addition, in cultures from third-instar larvae, TIM degradation was blocked specifically by inhibitors of proteasome activity. Degradation appeared to be preceded by tyrosine phosphorylation. Finally, TIM was ubiquitinated in response to light in cultured cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naidoo, N -- Song, W -- Hunter-Ensor, M -- Sehgal, A -- New York, N.Y. -- Science. 1999 Sep 10;285(5434):1737-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Neuroscience, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10481010" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcysteine/analogs & derivatives/pharmacology ; Animals ; *Biological Clocks ; Cells, Cultured ; *Circadian Rhythm ; Cysteine Endopeptidases/*physiology ; Cysteine Proteinase Inhibitors/pharmacology ; Darkness ; Drosophila ; *Drosophila Proteins ; Feedback ; Insect Proteins/*metabolism ; Leucine/analogs & derivatives/pharmacology ; Leupeptins/pharmacology ; *Light ; Multienzyme Complexes/*physiology ; Neurons/*metabolism ; Phosphorylation ; Phosphotyrosine/metabolism ; Protease Inhibitors/pharmacology ; Proteasome Endopeptidase Complex ; Ubiquitins/metabolism
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    Perspectives: neurobiology. PrP's double causes trouble (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weissmann, C -- Aguzzi, A -- New York, N.Y. -- Science. 1999 Oct 29;286(5441):914-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Prion Unit/Neurogenetics, Imperial College School of Medicine at St. Mary's, London W2 1PG, UK. c.weissmann@ic.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577243" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; GPI-Linked Proteins ; Humans ; Mice ; Mice, Knockout ; Open Reading Frames ; Phenotype ; Prion Diseases/*genetics ; Prions/*genetics ; Tissue Distribution
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    Synergistic signaling in fetal brain by STAT3-Smad1 complex bridged by p300 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-16
    Description: The cytokines LIF (leukemia inhibitory factor) and BMP2 (bone morphogenetic protein-2) signal through different receptors and transcription factors, namely STATs (signal transducers and activators of transcription) and Smads. LIF and BMP2 were found to act in synergy on primary fetal neural progenitor cells to induce astrocytes. The transcriptional coactivator p300 interacts physically with STAT3 at its amino terminus in a cytokine stimulation-independent manner, and with Smad1 at its carboxyl terminus in a cytokine stimulation-dependent manner. The formation of a complex between STAT3 and Smad1, bridged by p300, is involved in the cooperative signaling of LIF and BMP2 and the subsequent induction of astrocytes from neural progenitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakashima, K -- Yanagisawa, M -- Arakawa, H -- Kimura, N -- Hisatsune, T -- Kawabata, M -- Miyazono, K -- Taga, T -- New York, N.Y. -- Science. 1999 Apr 16;284(5413):479-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Cell Biology, Cell Fate Modulation Research Unit, Medical Research Institute, Tokyo Medical and Dental University, Tokyo 101-0062, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10205054" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/cytology ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Protein Receptors ; Bone Morphogenetic Proteins/metabolism/pharmacology ; COS Cells ; Cell Differentiation ; Cell Nucleus/metabolism ; Cells, Cultured ; Cytokines/*pharmacology ; DNA-Binding Proteins/*metabolism ; E1A-Associated p300 Protein ; Glial Fibrillary Acidic Protein/genetics ; Growth Inhibitors/metabolism/pharmacology ; *Interleukin-6 ; Leukemia Inhibitory Factor ; Leukemia Inhibitory Factor Receptor alpha Subunit ; Lymphokines/metabolism/pharmacology ; Mice ; Nuclear Proteins/*metabolism ; Promoter Regions, Genetic ; Receptors, Cell Surface/metabolism ; Receptors, Cytokine/metabolism ; *Receptors, Growth Factor ; Receptors, OSM-LIF ; STAT3 Transcription Factor ; Sequence Deletion ; *Signal Transduction ; Smad Proteins ; Smad1 Protein ; Stem Cells/cytology/metabolism ; Telencephalon/embryology/metabolism ; Trans-Activators/*metabolism ; *Transcriptional Activation ; *Transforming Growth Factor beta
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    Genetic mechanisms of age regulation of human blood coagulation factor IX (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Blood coagulation capacity increases with age in healthy individuals. Through extensive longitudinal analyses of human factor IX gene expression in transgenic mice, two essential age-regulatory elements, AE5' and AE3', have been identified. These elements are required and together are sufficient for normal age regulation of factor IX expression. AE5', a PEA-3 related element present in the 5' upstream region of the gene encoding factor IX, is responsible for age-stable expression of the gene. AE3', in the middle of the 3' untranslated region, is responsible for age-associated elevation in messenger RNA levels. In a concerted manner, AE5' and AE3' recapitulate natural patterns of the advancing age-associated increase in factor IX gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kurachi, S -- Deyashiki, Y -- Takeshita, J -- Kurachi, K -- AG13283/AG/NIA NIH HHS/ -- HL38644/HL/NHLBI NIH HHS/ -- HL53713/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):739-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI 48109-0618, USA. kkurachi@umich.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426997" target="_blank"〉PubMed〈/a〉
    Keywords: *3' Untranslated Regions ; Aging/blood/*genetics ; Animals ; Consensus Sequence ; DNA Footprinting ; Dinucleotide Repeats ; Factor IX/*genetics/metabolism ; Female ; *Gene Expression Regulation ; Genetic Vectors ; Humans ; Male ; Mice ; Mice, Transgenic ; RNA, Messenger/genetics/metabolism ; *Regulatory Sequences, Nucleic Acid ; Transcription Factors/genetics/metabolism ; Transcription, Genetic ; Tumor Cells, Cultured
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    Cell activation and apoptosis by bacterial lipoproteins through toll-like receptor-2 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Apoptosis is implicated in the generation and resolution of inflammation in response to bacterial pathogens. All bacterial pathogens produce lipoproteins (BLPs), which trigger the innate immune response. BLPs were found to induce apoptosis in THP-1 monocytic cells through human Toll-like receptor-2 (hTLR2). BLPs also initiated apoptosis in an epithelial cell line transfected with hTLR2. In addition, BLPs stimulated nuclear factor-kappaB, a transcriptional activator of multiple host defense genes, and activated the respiratory burst through hTLR2. Thus, hTLR2 is a molecular link between microbial products, apoptosis, and host defense mechanisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aliprantis, A O -- Yang, R B -- Mark, M R -- Suggett, S -- Devaux, B -- Radolf, J D -- Klimpel, G R -- Godowski, P -- Zychlinsky, A -- AI 37720-04/AI/NIAID NIH HHS/ -- AI-38894/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):736-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Skirball Institute and Department of Microbiology, New York University School of Medicine, 540 First Avenue, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426996" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal ; Antigens, CD14/analysis ; *Apoptosis ; Bacterial Proteins/metabolism/*pharmacology ; Cell Line/metabolism ; Cycloheximide/pharmacology ; Cytotoxicity, Immunologic ; *Drosophila Proteins ; Genes, Reporter ; Humans ; Lipopolysaccharides/immunology ; Lipoproteins/metabolism/*pharmacology ; Membrane Glycoproteins/immunology/*metabolism ; Monocytes/*cytology/immunology/metabolism ; NF-kappa B/metabolism ; Protein Synthesis Inhibitors/pharmacology ; Reactive Oxygen Species/metabolism ; Receptors, Cell Surface/immunology/*metabolism ; Signal Transduction ; Tetradecanoylphorbol Acetate/pharmacology ; Toll-Like Receptor 2 ; Toll-Like Receptors ; Transfection ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Behind the headlines of endostatin's ups and downs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1250-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10084928" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/pharmacology/*therapeutic use ; Clinical Trials as Topic ; Collagen/pharmacology/*therapeutic use ; Endostatins ; Humans ; Mice ; Neoplasms, Experimental/blood supply/*drug therapy/pathology ; Neovascularization, Pathologic/*drug therapy ; Newspapers as Topic ; Peptide Fragments/pharmacology/*therapeutic use ; Recombinant Proteins/pharmacology/therapeutic use ; Reproducibility of Results
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 167
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    STAT5 interaction with the T cell receptor complex and stimulation of T cell proliferation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-08
    Description: The role of STAT (signal transducer and activator of transcription) proteins in T cell receptor (TCR) signaling was analyzed. STAT5 became immediately and transiently phosphorylated on tyrosine 694 in response to TCR stimulation. Expression of the protein tyrosine kinase Lck, a key signaling protein in the TCR complex, activated DNA binding of transfected STAT5A and STAT5B to specific STAT inducible elements. The role of Lck in STAT5 activation was confirmed in a Lck-deficient T cell line in which the activation of STAT5 by TCR stimulation was abolished. Expression of Lck induced specific interaction of STAT5 with the subunits of the TCR, indicating that STAT5 may be directly involved in TCR signaling. Stimulation of T cell clones and primary T cell lines also induced the association of STAT5 with the TCR complex. Inhibition of STAT5 function by expression of a dominant negative mutant STAT5 reduced antigen-stimulated proliferation of T cells. Thus, TCR stimulation appears to directly activate STAT5, which may participate in the regulation of gene transcription and T cell proliferation during immunological responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Welte, T -- Leitenberg, D -- Dittel, B N -- al-Ramadi, B K -- Xie, B -- Chin, Y E -- Janeway, C A Jr -- Bothwell, A L -- Bottomly, K -- Fu, X Y -- AI34522/AI/NIAID NIH HHS/ -- GM46367/GM/NIGMS NIH HHS/ -- GM55590/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jan 8;283(5399):222-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Yale University School of Medicine, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9880255" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies ; Antigen-Presenting Cells/immunology ; Antigens/immunology ; Cell Division ; Cell Line ; DNA-Binding Proteins/genetics/*metabolism ; Interferon-gamma/pharmacology ; Interleukin-2/pharmacology ; *Lymphocyte Activation ; Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/genetics/metabolism ; Membrane Proteins/genetics/immunology/metabolism ; Mice ; Mice, Transgenic ; *Milk Proteins ; Phosphorylation ; Phosphotyrosine/metabolism ; Receptors, Antigen, T-Cell/genetics/immunology/*metabolism ; STAT5 Transcription Factor ; Signal Transduction ; T-Lymphocytes, Helper-Inducer/cytology/*immunology/metabolism ; Th2 Cells/immunology/metabolism ; Trans-Activators/genetics/*metabolism ; Transfection
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 168
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    Memory T cells don't need practice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1267-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610529" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Antigen Presentation ; CD8-Positive T-Lymphocytes/*immunology/transplantation ; Cell Division ; Histocompatibility Antigens Class I/immunology/metabolism ; Histocompatibility Antigens Class II/immunology ; *Immunologic Memory ; Lymphocyte Activation ; Mice ; Mice, Transgenic ; T-Lymphocyte Subsets/cytology/*immunology ; T-Lymphocytes, Helper-Inducer/*immunology/transplantation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 169
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    Fusion-competent vaccines: broad neutralization of primary isolates of HIV (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: Current recombinant human immunodeficiency virus (HIV) gp120 protein vaccine candidates are unable to elicit antibodies capable of neutralizing infectivity of primary isolates from patients. Here, "fusion-competent" HIV vaccine immunogens were generated that capture the transient envelope-CD4-coreceptor structures that arise during HIV binding and fusion. In a transgenic mouse immunization model, these formaldehyde-fixed whole-cell vaccines elicited antibodies capable of neutralizing infectivity of 23 of 24 primary HIV isolates from diverse geographic locations and genetic clades A to E. Development of these fusion-dependent immunogens may lead to a broadly effective HIV vaccine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉LaCasse, R A -- Follis, K E -- Trahey, M -- Scarborough, J D -- Littman, D R -- Nunberg, J H -- AI33856/AI/NIAID NIH HHS/ -- AI41165/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):357-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Montana Biotechnology Center and Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888845" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines/*immunology ; Animals ; Antigens, CD4/metabolism ; Cell Fusion ; Coculture Techniques ; Epitopes/immunology ; Gene Products, env/chemistry/*immunology/metabolism ; Giant Cells ; HIV Antibodies/biosynthesis/*immunology ; HIV Antigens/chemistry/*immunology ; HIV Envelope Protein gp120/chemistry/immunology/metabolism ; HIV Envelope Protein gp41/chemistry/immunology/metabolism ; HIV Infections/virology ; HIV-1/*immunology/isolation & purification/physiology ; Humans ; Mice ; Mice, Transgenic ; Neutralization Tests ; Protein Conformation ; Receptors, CCR5/metabolism ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 170
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    Tbx5 and the retinotectum projection (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: Dorsal and ventral aspects of the eye are distinct from the early stages of development. The developing eye cup grows dorsally, and the choroidal fissure is formed on its ventral side. Retinal axons from the dorsal and ventral retina project to the ventral and dorsal tectum, respectively. Misexpression of the Tbx5 gene induced dorsalization of the ventral side of the eye and altered projections of retinal ganglion cell axons. Thus, Tbx5 is involved in eye morphogenesis and is a topographic determinant of the visual projections between retina and tectum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koshiba-Takeuchi, K -- Takeuchi, J K -- Matsumoto, K -- Momose, T -- Uno, K -- Hoepker, V -- Ogura, K -- Takahashi, N -- Nakamura, H -- Yasuda, K -- Ogura, T -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):134-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara, Japan 630-0101.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615048" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Avian Proteins ; Axons/*ultrastructure ; Body Patterning ; Bone Morphogenetic Protein 4 ; Bone Morphogenetic Proteins/genetics/physiology ; Chick Embryo ; DNA-Binding Proteins/genetics ; Electroporation ; Ephrin-B1 ; Ephrin-B2 ; Eye/*embryology ; Gene Expression ; Homeodomain Proteins/genetics ; Membrane Proteins/genetics/physiology ; Morphogenesis ; PAX2 Transcription Factor ; Pigment Epithelium of Eye/embryology/metabolism ; Retina/*embryology/metabolism ; Retinal Ganglion Cells/ultrastructure ; Superior Colliculi/*embryology ; T-Box Domain Proteins/genetics/*physiology ; Transcription Factors/genetics ; Transfection ; Transgenes
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  • 171
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    DNA topoisomerase IIbeta and neural development (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: DNA topoisomerase IIbeta is shown to have an unsuspected and critical role in neural development. Neurogenesis was normal in IIbeta mutant mice, but motor axons failed to contact skeletal muscles, and sensory axons failed to enter the spinal cord. Despite an absence of innervation, clusters of acetylcholine receptors were concentrated in the central region of skeletal muscles, thereby revealing patterning mechanisms that are autonomous to skeletal muscle. The defects in motor axon growth in IIbeta mutant mice resulted in a breathing impairment and death of the pups shortly after birth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, X -- Li, W -- Prescott, E D -- Burden, S J -- Wang, J C -- NS10537/NS/NINDS NIH HHS/ -- NS27963/NS/NINDS NIH HHS/ -- NS36193/NS/NINDS NIH HHS/ -- R01 NS036193/NS/NINDS NIH HHS/ -- R01 NS036193-02/NS/NINDS NIH HHS/ -- R01 NS041311/NS/NINDS NIH HHS/ -- R01 NS041311-03/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):131-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Skirball Institute of Molecular Medicine, New York University Medical School, 540 First Avenue, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology/ultrastructure ; Cell Lineage ; Cues ; DNA Repair ; DNA Topoisomerases, Type II/genetics/*metabolism ; DNA-Binding Proteins ; Diaphragm/chemistry/embryology/innervation ; Embryonic and Fetal Development ; Gene Targeting ; Intercostal Muscles/innervation ; Mice ; Mice, Knockout ; Motor Neurons/physiology/ultrastructure ; Muscle, Skeletal/embryology/*innervation ; Neuromuscular Junction/*embryology/growth & development ; Neurons, Afferent/physiology/ultrastructure ; Presynaptic Terminals/ultrastructure ; Receptors, Cholinergic/analysis ; Skin/innervation ; Spinal Cord/embryology/ultrastructure
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  • 172
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    A mammalian H+ channel generated through alternative splicing of the NADPH oxidase homolog NOH-1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: Voltage-gated proton (H+) channels are found in many human and animal tissues and play an important role in cellular defense against acidic stress. However, a molecular identification of these unique ion conductances has so far not been achieved. A 191-amino acid protein is described that, upon heterologous expression, has properties indistinguishable from those of native H+ channels. This protein is generated through alternative splicing of messenger RNA derived from the gene NOH-1 (NADPH oxidase homolog 1, where NADPH is the reduced form of nicotinamide adenine dinucleotide phosphate).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Banfi, B -- Maturana, A -- Jaconi, S -- Arnaudeau, S -- Laforge, T -- Sinha, B -- Ligeti, E -- Demaurex, N -- Krause, K H -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):138-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology of Aging Laboratory, Department of Geriatrics, Geneva University Hospitals, Geneva Medical School, CH-1211 Geneva 4, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615049" target="_blank"〉PubMed〈/a〉
    Keywords: *Alternative Splicing ; Amino Acid Sequence ; Cell Line ; Cytosol/metabolism ; Electric Conductivity ; Electron Transport ; Expressed Sequence Tags ; Humans ; Hydrogen/*metabolism ; Hydrogen-Ion Concentration ; Ion Channel Gating ; Ion Channels/chemistry/*genetics/metabolism ; Membrane Glycoproteins/chemistry/*genetics ; Molecular Sequence Data ; NADPH Oxidase/chemistry/*genetics ; Patch-Clamp Techniques ; Protons ; Transfection ; Tumor Cells, Cultured ; Zinc/pharmacology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    An adhesin of the yeast pathogen Candida glabrata mediating adherence to human epithelial cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Candida glabrata is an important fungal pathogen of humans that is responsible for about 15 percent of mucosal and systemic candidiasis. Candida glabrata adhered avidly to human epithelial cells in culture. By means of a genetic approach and a strategy allowing parallel screening of mutants, it was possible to clone a lectin from a Candida species. Deletion of this adhesin reduced adherence of C. glabrata to human epithelial cells by 95 percent. The adhesin, encoded by the EPA1 gene, is likely a glucan-cross-linked cell-wall protein and binds to host-cell carbohydrate, specifically recognizing asialo-lactosyl-containing carbohydrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cormack, B P -- Ghori, N -- Falkow, S -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):578-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Stanford University School of Medicine, Fairchild D039, 299 Campus Drive, Stanford, CA 94305-5124, USA. bcormack@jhmi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417386" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium/metabolism ; Candida/*genetics/*pathogenicity/physiology ; Candidiasis, Vulvovaginal/microbiology ; Carbohydrates/pharmacology ; Cell Adhesion ; Cloning, Molecular ; Epithelial Cells/*microbiology ; Female ; *Fungal Proteins ; Genes, Fungal ; Humans ; Lectins/chemistry/*genetics/metabolism ; Ligands ; Mice ; Mice, Inbred DBA ; Molecular Sequence Data ; Mutagenesis, Insertional ; Mutation ; Plasmids ; Polymerase Chain Reaction ; Transformation, Genetic ; Tumor Cells, Cultured ; Virulence/genetics
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 174
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    Lentiviral vectors--the promise of gene therapy within reach? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Amado, R G -- Chen, I S -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):674-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, UCLA School of Medicine and UCLA AIDS Institute, Los Angeles, CA 90095, USA. ramado@ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10454923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; *Gene Transfer Techniques ; Genes, Viral ; *Genetic Therapy ; *Genetic Vectors ; HIV/*genetics/physiology ; HIV Infections/therapy/virology ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/cytology/physiology ; Humans ; Lentivirus/*genetics/physiology ; Mutagenesis, Insertional ; Plasmids ; Recombination, Genetic ; Retinitis Pigmentosa/therapy ; Transfection ; Virus Replication
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Regulation of NMDA receptors by an associated phosphatase-kinase signaling complex (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-03
    Description: Regulation of N-methyl-D-aspartate (NMDA) receptor activity by kinases and phosphatases contributes to the modulation of synaptic transmission. Targeting of these enzymes near the substrate is proposed to enhance phosphorylation-dependent modulation. Yotiao, an NMDA receptor-associated protein, bound the type I protein phosphatase (PP1) and the adenosine 3',5'-monophosphate (cAMP)-dependent protein kinase (PKA) holoenzyme. Anchored PP1 was active, limiting channel activity, whereas PKA activation overcame constitutive PP1 activity and conferred rapid enhancement of NMDA receptor currents. Hence, yotiao is a scaffold protein that physically attaches PP1 and PKA to NMDA receptors to regulate channel activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Westphal, R S -- Tavalin, S J -- Lin, J W -- Alto, N M -- Fraser, I D -- Langeberg, L K -- Sheng, M -- Scott, J D -- F32 NS010202/NS/NINDS NIH HHS/ -- GM 48231/GM/NIGMS NIH HHS/ -- NS10202/NS/NINDS NIH HHS/ -- NS10543/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):93-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Vollum Institute, Oregon Health Sciences University, 3181 S.W. Sam Jackson Road, Portland, OR 97201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10390370" target="_blank"〉PubMed〈/a〉
    Keywords: A Kinase Anchor Proteins ; *Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Binding Sites ; Carrier Proteins/*metabolism ; Cell Line ; Cyclic AMP/analogs & derivatives/pharmacology ; Cyclic AMP-Dependent Protein Kinases/*metabolism ; Cytoskeletal Proteins/*metabolism ; Enzyme Inhibitors/pharmacology ; Holoenzymes/metabolism ; Humans ; Molecular Sequence Data ; Okadaic Acid/pharmacology ; Patch-Clamp Techniques ; Peptide Fragments/pharmacology ; Phosphoprotein Phosphatases/*metabolism ; Phosphorylation ; Rats ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Thionucleotides/pharmacology ; Transfection
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 176
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    Anti-inflammatory properties of cytochrome P450 epoxygenase-derived eicosanoids (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-24
    Description: The epoxyeicosatrienoic acids (EETs) are products of cytochrome P450 epoxygenases that have vasodilatory properties similar to that of endothelium-derived hyperpolarizing factor. The cytochrome P450 isoform CYP2J2 was cloned and identified as a potential source of EETs in human endothelial cells. Physiological concentrations of EETs or overexpression of CYP2J2 decreased cytokine-induced endothelial cell adhesion molecule expression, and EETs prevented leukocyte adhesion to the vascular wall by a mechanism involving inhibition of transcription factor NF-kappaB and IkappaB kinase. The inhibitory effects of EETs were independent of their membrane-hyperpolarizing effects, suggesting that these molecules play an important nonvasodilatory role in vascular inflammation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2720027/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2720027/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Node, K -- Huo, Y -- Ruan, X -- Yang, B -- Spiecker, M -- Ley, K -- Zeldin, D C -- Liao, J K -- HL-52233/HL/NHLBI NIH HHS/ -- HL-58108/HL/NHLBI NIH HHS/ -- P01 HL048743/HL/NHLBI NIH HHS/ -- P01 HL048743-080008/HL/NHLBI NIH HHS/ -- P01 HL048743-090008/HL/NHLBI NIH HHS/ -- R01 HL052233/HL/NHLBI NIH HHS/ -- R01 HL052233-05/HL/NHLBI NIH HHS/ -- R01 HL052233-06/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Aug 20;285(5431):1276-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vascular Medicine and Atherosclerosis Unit, Cardiovascular Division, Brigham and Women's Hospital and Harvard Medical School, 221 Longwood Avenue, LMRC-322, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10455056" target="_blank"〉PubMed〈/a〉
    Keywords: 8,11,14-Eicosatrienoic Acid/analogs & derivatives/*metabolism/*pharmacology ; Animals ; *Anti-Inflammatory Agents, Non-Steroidal/metabolism/pharmacology ; Carotid Arteries/cytology ; Cattle ; Cell Adhesion/drug effects ; Cell Adhesion Molecules/biosynthesis ; Cells, Cultured ; Coronary Vessels/enzymology ; Cytochrome P-450 Enzyme System/genetics/*metabolism ; DNA-Binding Proteins/metabolism ; Endothelium, Vascular/enzymology/*metabolism ; Humans ; Hydroxyeicosatetraenoic Acids/pharmacology ; I-kappa B Kinase ; *I-kappa B Proteins ; Mice ; Mice, Inbred C57BL ; NF-kappa B/antagonists & inhibitors/metabolism ; Oxygenases/genetics/*metabolism ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/metabolism ; Tumor Necrosis Factor-alpha/antagonists & inhibitors/pharmacology ; Vascular Cell Adhesion Molecule-1/biosynthesis/genetics
    Print ISSN: 0036-8075
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    A gene that scrambles your heart (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1091,1093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10075562" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Transcription Factors ; Cell Cycle Proteins/genetics ; Chromosomes, Human, Pair 22/genetics ; DNA-Binding Proteins/genetics/physiology ; DiGeorge Syndrome/*genetics ; Gene Deletion ; Heart/embryology ; Heart Defects, Congenital/*genetics ; Humans ; Mice ; Neural Crest/cytology/embryology ; Proteins/*genetics/physiology ; Transcription Factors/genetics/physiology ; Ubiquitins ; Zebrafish Proteins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Ethical loophole closing up for stem cell researchers (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steghaus-Kovac, S -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10532887" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bioethics ; Cell Line ; Embryo Research ; Embryo, Mammalian/*cytology ; Female ; Fetus/*cytology ; *Genomic Imprinting ; Germ Cells/*cytology ; Humans ; Male ; Mice ; Stem Cells/*cytology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 179
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    Role of bacterial intimin in colonic hyperplasia and inflammation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Enteropathogenic Escherichia coli (EPEC) cells adhere to gut epithelial cells through intimin alpha: the ligand for a bacterially derived epithelial transmembrane protein called the translocated intimin receptor. Citrobacter rodentium colonizes the mouse colon in a similar fashion and uses a different intimin: intimin beta. Intimin alpha was found to costimulate submitogenic signals through the T cell receptor. Dead intimin beta+ C. rodentium, intimin alpha-transfected C. rodentium or E. coli strain K12, and EPEC induced mucosal hyperplasia identical to that caused by C. rodentium live infection, as well as a massive T helper cell-type 1 immune response in the colonic mucosa. Mutation of cysteine-937 of intimin to alanine reduced costimulatory activity in vitro and prevented immunopathology in vivo. The mucosal changes elicited by C. rodentium were interferon-gamma-dependent. Immunopathology induced by intimin enables the bacteria to promote conditions that are favorable for increased microbial colonization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Higgins, L M -- Frankel, G -- Connerton, I -- Goncalves, N S -- Dougan, G -- MacDonald, T T -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):588-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Paediatric Gastroenterology, St. Bartholomews and the Royal London School of Medicine and Dentistry, London EC1A 7BE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417389" target="_blank"〉PubMed〈/a〉
    Keywords: *Adhesins, Bacterial ; Animals ; Bacterial Adhesion ; Bacterial Outer Membrane Proteins/pharmacology/*physiology ; *Carrier Proteins ; Citrobacter/*pathogenicity ; Colitis/immunology/*microbiology/pathology ; Colon/immunology/microbiology/*pathology ; Cytokines/biosynthesis/genetics ; Enterobacteriaceae Infections/immunology/*microbiology/pathology ; Escherichia coli/pathogenicity ; *Escherichia coli Proteins ; Hyperplasia ; Interferon-gamma/physiology ; Intestinal Mucosa/immunology/microbiology/pathology ; Ligands ; Lymphocyte Activation ; Mice ; Mice, Inbred BALB C ; Receptors, Cell Surface/metabolism ; T-Lymphocytes/immunology ; Th1 Cells/*immunology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 180
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    Activation of NK cells and T cells by NKG2D, a receptor for stress-inducible MICA (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Stress-inducible MICA, a distant homolog of major histocompatibility complex (MHC) class I, functions as an antigen for gammadelta T cells and is frequently expressed in epithelial tumors. A receptor for MICA was detected on most gammadelta T cells, CD8+ alphabeta T cells, and natural killer (NK) cells and was identified as NKG2D. Effector cells from all these subsets could be stimulated by ligation of NKG2D. Engagement of NKG2D activated cytolytic responses of gammadelta T cells and NK cells against transfectants and epithelial tumor cells expressing MICA. These results define an activating immunoreceptor-MHC ligand interaction that may promote antitumor NK and T cell responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bauer, S -- Groh, V -- Wu, J -- Steinle, A -- Phillips, J H -- Lanier, L L -- Spies, T -- P01 CA18221/CA/NCI NIH HHS/ -- R01 AI30581/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):727-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fred Hutchinson Cancer Research Center, Clinical Research Division, 1100 Fairview Avenue North, Seattle, WA 98109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426993" target="_blank"〉PubMed〈/a〉
    Keywords: Cytotoxicity, Immunologic ; Histocompatibility Antigens Class I/*immunology/metabolism ; Humans ; Jurkat Cells ; Killer Cells, Natural/*immunology ; Ligands ; *Lymphocyte Activation ; Lymphocyte Subsets/immunology ; Membrane Proteins/metabolism ; NK Cell Lectin-Like Receptor Subfamily K ; Receptors, Antigen, T-Cell, gamma-delta/immunology ; Receptors, Immunologic/chemistry/genetics/*immunology/metabolism ; Receptors, Natural Killer Cell ; Signal Transduction ; T-Lymphocytes/*immunology ; Transfection ; Tumor Cells, Cultured
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Neuronal activity-dependent cell survival mediated by transcription factor MEF2 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: During mammalian development, electrical activity promotes the calcium-dependent survival of neurons that have made appropriate synaptic connections. However, the mechanisms by which calcium mediates neuronal survival during development are not well characterized. A transcription-dependent mechanism was identified by which calcium influx into neurons promoted cell survival. The transcription factor MEF2 was selectively expressed in newly generated postmitotic neurons and was required for the survival of these neurons. Calcium influx into cerebellar granule neurons led to activation of p38 mitogen-activated protein kinase-dependent phosphorylation and activation of MEF2. Once activated, MEF2 regulated neuronal survival by stimulating MEF2-dependent gene transcription. These findings demonstrate that MEF2 is a calcium-regulated transcription factor and define a function for MEF2 during nervous system development that is distinct from previously well-characterized functions of MEF2 during muscle differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mao, Z -- Bonni, A -- Xia, F -- Nadal-Vicens, M -- Greenberg, M E -- 5T32NS07112/NS/NINDS NIH HHS/ -- NS28829/NS/NINDS NIH HHS/ -- P30-HD18655/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):785-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Department of Neurology, Children's Hospital and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531066" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Calcium/metabolism ; Calcium Channels, L-Type/metabolism ; Cell Differentiation ; Cell Survival ; Cells, Cultured ; Cerebellum/cytology/metabolism ; Cerebral Cortex/cytology/embryology/metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Dimerization ; Immunohistochemistry ; MEF2 Transcription Factors ; Mitogen-Activated Protein Kinases/metabolism ; Mitosis ; Mutation ; Myogenic Regulatory Factors ; Neurons/*cytology/*metabolism ; Phosphorylation ; Rats ; Signal Transduction ; Transcription Factors/genetics/*metabolism ; *Transcription, Genetic ; Transfection ; p38 Mitogen-Activated Protein Kinases
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 182
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    Multilineage potential of adult human mesenchymal stem cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-02
    Description: Human mesenchymal stem cells are thought to be multipotent cells, which are present in adult marrow, that can replicate as undifferentiated cells and that have the potential to differentiate to lineages of mesenchymal tissues, including bone, cartilage, fat, tendon, muscle, and marrow stroma. Cells that have the characteristics of human mesenchymal stem cells were isolated from marrow aspirates of volunteer donors. These cells displayed a stable phenotype and remained as a monolayer in vitro. These adult stem cells could be induced to differentiate exclusively into the adipocytic, chondrocytic, or osteocytic lineages. Individual stem cells were identified that, when expanded to colonies, retained their multilineage potential.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pittenger, M F -- Mackay, A M -- Beck, S C -- Jaiswal, R K -- Douglas, R -- Mosca, J D -- Moorman, M A -- Simonetti, D W -- Craig, S -- Marshak, D R -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):143-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Osiris Therapeutics, 2001 Aliceanna Street, Baltimore, MD 21231-3043, USA. mpittenger@osiristx.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10102814" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/*cytology ; Adult ; Apoptosis ; Bone Marrow Cells/cytology ; Cell Differentiation ; Cell Division ; *Cell Lineage ; Cell Separation ; Cells, Cultured ; Chondrocytes/*cytology ; Fibroblasts/cytology ; Flow Cytometry ; Humans ; Mesoderm/*cytology ; Middle Aged ; Osteocytes/*cytology ; Phenotype ; Stem Cells/*cytology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Role of NADH shuttle system in glucose-induced activation of mitochondrial metabolism and insulin secretion (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-12
    Description: Glucose metabolism in glycolysis and in mitochondria is pivotal to glucose-induced insulin secretion from pancreatic beta cells. One or more factors derived from glycolysis other than pyruvate appear to be required for the generation of mitochondrial signals that lead to insulin secretion. The electrons of the glycolysis-derived reduced form of nicotinamide adenine dinucleotide (NADH) are transferred to mitochondria through the NADH shuttle system. By abolishing the NADH shuttle function, glucose-induced increases in NADH autofluorescence, mitochondrial membrane potential, and adenosine triphosphate content were reduced and glucose-induced insulin secretion was abrogated. The NADH shuttle evidently couples glycolysis with activation of mitochondrial energy metabolism to trigger insulin secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eto, K -- Tsubamoto, Y -- Terauchi, Y -- Sugiyama, T -- Kishimoto, T -- Takahashi, N -- Yamauchi, N -- Kubota, N -- Murayama, S -- Aizawa, T -- Akanuma, Y -- Aizawa, S -- Kasai, H -- Yazaki, Y -- Kadowaki, T -- New York, N.Y. -- Science. 1999 Feb 12;283(5404):981-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan. Tokyo〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9974390" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Aminooxyacetic Acid/pharmacology ; Animals ; Aspartate Aminotransferases/antagonists & inhibitors ; Calcium/metabolism ; Citric Acid Cycle ; Enzyme Inhibitors/pharmacology ; Female ; Gene Targeting ; Glucose/metabolism/*pharmacology ; Glycerolphosphate Dehydrogenase/genetics/metabolism ; Glycolysis ; Insulin/*secretion ; Islets of Langerhans/metabolism/*secretion ; Male ; Membrane Potentials ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mitochondria/*metabolism ; Models, Biological ; Molecular Sequence Data ; NAD/*metabolism ; Pyruvic Acid/metabolism
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    Impaired Fas response and autoimmunity in Pten+/- mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-25
    Description: Inactivating mutations in the PTEN tumor suppressor gene, encoding a phosphatase, occur in three related human autosomal dominant disorders characterized by tumor susceptibility. Here it is shown that Pten heterozygous (Pten+/-) mutants develop a lethal polyclonal autoimmune disorder with features reminiscent of those observed in Fas-deficient mutants. Fas-mediated apoptosis was impaired in Pten+/- mice, and T lymphocytes from these mice show reduced activation-induced cell death and increased proliferation upon activation. Phosphatidylinositol (PI) 3-kinase inhibitors restored Fas responsiveness in Pten+/- cells. These results indicate that Pten is an essential mediator of the Fas response and a repressor of autoimmunity and thus implicate the PI 3-kinase/Akt pathway in Fas-mediated apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Di Cristofano, A -- Kotsi, P -- Peng, Y F -- Cordon-Cardo, C -- Elkon, K B -- Pandolfi, P P -- AR45482/AR/NIAMS NIH HHS/ -- CA-08748/CA/NCI NIH HHS/ -- CA-82328/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2122-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics-Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, Sloan-Kettering Institute, 1275 York Avenue, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10497129" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Antinuclear/blood ; Antigens, CD95/*physiology ; *Apoptosis ; Autoimmune Diseases/*immunology/pathology ; B-Lymphocytes/immunology/pathology ; Female ; Heterozygote ; Immunoglobulin G/blood ; Kidney Diseases/*immunology/pathology ; Kidney Glomerulus/immunology/pathology ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred C57BL ; PTEN Phosphohydrolase ; Phosphatidylinositol 3-Kinases/antagonists & inhibitors/metabolism ; Phosphoric Monoester Hydrolases/genetics/*physiology ; Phosphorylation ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-akt ; T-Lymphocytes/immunology/pathology ; *Tumor Suppressor Proteins
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    Negative feedback regulation of TGF-beta signaling by the SnoN oncoprotein (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: Smad proteins mediate transforming growth factor-beta (TGF-beta) signaling to regulate cell growth and differentiation. The SnoN oncoprotein was found to interact with Smad2 and Smad4 and to repress their abilities to activate transcription through recruitment of the transcriptional corepressor N-CoR. Immediately after TGF-beta stimulation, SnoN is rapidly degraded by the nuclear accumulation of Smad3, allowing the activation of TGF-beta target genes. By 2 hours, TGF-beta induces a marked increase in SnoN expression, resulting in termination of Smad-mediated transactivation. Thus, SnoN maintains the repressed state of TGF-beta-responsive genes in the absence of ligand and participates in negative feedback regulation of TGF-beta signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stroschein, S L -- Wang, W -- Zhou, S -- Zhou, Q -- Luo, K -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):771-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Life Sciences Division, Lawrence Berkeley National Laboratory, and Department of Molecular and Cell Biology, University of California, Berkeley, 229 Stanley Hall, Mail Code 3206, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531062" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division ; Cell Line ; Cell Nucleus/metabolism ; DNA/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Feedback ; *Gene Expression Regulation ; Humans ; Intracellular Signaling Peptides and Proteins ; Nuclear Proteins/metabolism ; Nuclear Receptor Co-Repressor 1 ; Promoter Regions, Genetic ; Proto-Oncogene Proteins/genetics/*metabolism ; Repressor Proteins/metabolism ; *Signal Transduction ; Smad2 Protein ; Smad3 Protein ; Smad4 Protein ; Trans-Activators/genetics/metabolism ; Transcription Factors/genetics/*metabolism ; Transcriptional Activation ; Transfection ; Transforming Growth Factor beta/*metabolism ; Tumor Cells, Cultured
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    Testing the genetics of behavior in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Picciotto, M R -- Self, D W -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2067; author reply 2069-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523199" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/genetics ; *Behavior, Animal ; Confounding Factors (Epidemiology) ; Environment ; Genetics, Behavioral/*methods ; Mice ; Reproducibility of Results
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  • 187
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    Redefining rats, mice, and birds. AAA (American Association of Anatomists) Public Affairs Committee (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Besharse, J C -- Carlson, B M -- Jenkins, D P -- Lester, D S -- Olds, J L -- Satir, P -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):49-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10215528" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Rights/*legislation & jurisprudence ; Animal Welfare/*legislation & jurisprudence ; Animals ; *Animals, Laboratory ; Birds ; Mice ; Rats ; Research ; Societies, Scientific ; United States ; United States Department of Agriculture/legislation & jurisprudence
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  • 188
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    Xid-like immunodeficiency in mice with disruption of the p85alpha subunit of phosphoinositide 3-kinase (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: Mice with a targeted gene disruption of p85alpha, a regulatory subunit of phosphoinositide 3-kinase, had impaired B cell development at the pro-B cell stage, reduced numbers of mature B cells and peritoneal CD5+ Ly-1 B cells, reduced B cell proliferative responses, and no T cell-independent antibody production. These phenotypes are nearly identical to those of Btk-/- or xid (X-linked immunodeficiency) mice. These results provide evidence that p85alpha is functionally linked to the Btk pathway in antigen receptor-mediated signal transduction and is pivotal in B cell development and functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suzuki, H -- Terauchi, Y -- Fujiwara, M -- Aizawa, S -- Yazaki, Y -- Kadowaki, T -- Koyasu, S -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):390-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888854" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Formation ; Antigens, CD5/analysis ; Antigens, Ly/analysis ; Antigens, T-Independent/immunology ; B-Lymphocyte Subsets/cytology/immunology ; B-Lymphocytes/cytology/*immunology ; Bone Marrow/immunology ; Cell Survival ; Gene Targeting ; Genetic Linkage ; Immunologic Deficiency Syndromes/*enzymology/genetics/immunology ; Lymphocyte Count ; Lymphoid Tissue/immunology ; Mice ; Mutation ; Phenotype ; Phosphatidylinositol 3-Kinases/genetics/*metabolism ; Protein-Tyrosine Kinases/genetics/metabolism ; Signal Transduction ; T-Lymphocytes/immunology ; X Chromosome
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  • 189
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    Class II-independent generation of CD4 memory T cells from effectors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-13
    Description: The factors required for the generation of memory CD4 T cells remain unclear, and whether there is a continuing requirement for antigen stimulation is critical to design of vaccine strategies. CD4 effectors generated in vitro from naive CD4 T cells of mice efficiently gave rise to small resting memory cells after transfer to class II-deficient hosts, indicating no requirement for further antigen or class II recognition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Swain, S L -- Hu, H -- Huston, G -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1381-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biomedical Research Laboratories, Trudeau Institute, 100 Algonquin Avenue, Saranac Lake, NY 12983, USA. sswain@northnet.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10558997" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Cell Division ; Cytokines/biosynthesis ; Histocompatibility Antigens Class II/*immunology ; Immunization ; *Immunologic Memory ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Transgenic ; Receptors, Antigen, T-Cell/immunology ; T-Lymphocyte Subsets/cytology/*immunology ; Th1 Cells/cytology/*immunology ; Th2 Cells/cytology/*immunology
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    Nota bene: neuroscience. For time is the longest distance between two places (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, O -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1504.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10498536" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Amnesia/physiopathology ; Animals ; Brain Mapping ; Hippocampus/*physiology ; Humans ; Male ; Maze Learning ; Memory/*physiology ; Mice ; Neocortex/*physiology ; Temporal Lobe/*physiology ; Time Factors
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  • 191
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    Processing of the notch ligand delta by the metalloprotease Kuzbanian (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-05
    Description: Signaling by the Notch surface receptor controls cell fate determination in a broad spectrum of tissues. This signaling is triggered by the interaction of the Notch protein with what, so far, have been thought to be transmembrane ligands expressed on adjacent cells. Here biochemical and genetic analyses show that the ligand Delta is cleaved on the surface, releasing an extracellular fragment capable of binding to Notch and acting as an agonist of Notch activity. The ADAM disintegrin metalloprotease Kuzbanian is required for this processing event. These observations raise the possibility that Notch signaling in vivo is modulated by soluble forms of the Notch ligands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Qi, H -- Rand, M D -- Wu, X -- Sestan, N -- Wang, W -- Rakic, P -- Xu, T -- Artavanis-Tsakonas, S -- NS14841/NS/NINDS NIH HHS/ -- NS26084/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):91-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Yale University School of Medicine, Boyer Center for Molecular Medicine, 295 Congress Avenue, New Haven, CT 06536-0812, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872749" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Cells, Cultured ; Disintegrins/genetics/*metabolism ; Drosophila/embryology/genetics/metabolism ; *Drosophila Proteins ; Female ; Intracellular Signaling Peptides and Proteins ; Ligands ; Male ; Membrane Proteins/genetics/*metabolism ; Metalloendopeptidases/genetics/*metabolism ; Molecular Sequence Data ; Mutation ; Neurons/cytology ; Protein Processing, Post-Translational ; Receptors, Notch ; Signal Transduction ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 192
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    Immortalized cells seem cancer-free so far (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ferber, D -- New York, N.Y. -- Science. 1999 Jan 8;283(5399):154-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9925469" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Aging ; *Cell Division ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Humans ; Mutation ; Neoplasms/pathology ; Telomerase/genetics/*metabolism ; Telomere/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 193
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    New clues found to diabetes and obesity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ferber, D -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1423, 1425.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10206863" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/metabolism ; Diabetes Mellitus/drug therapy/*metabolism ; Diabetes Mellitus, Type 2/drug therapy/*metabolism ; Humans ; Insulin/*metabolism ; Mice ; Mice, Knockout ; Mutation ; Obesity/drug therapy/*metabolism ; Phosphates/metabolism ; Protein Tyrosine Phosphatases/antagonists & inhibitors/genetics/*metabolism ; Receptor, Insulin/metabolism ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 194
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    Gene skews patterns of inheritance (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1269.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610530" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosomes/*genetics ; Female ; Genes ; Male ; Mice ; Protein Kinases/*genetics/metabolism ; Sperm Motility/*genetics ; Spermatozoa/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 195
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    Arthritis provoked by linked T and B cell recognition of a glycolytic enzyme (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-27
    Description: The hallmark of rheumatoid arthritis (RA) is specific destruction of the synovial joints. In a mouse line that spontaneously develops a disorder with many of the features of human RA, disease is initiated by T cell recognition of a ubiquitously expressed self-antigen; once initiated, pathology is driven almost entirely by immunoglobulins. In this study, the target of both the initiating T cells and pathogenic immunoglobulins was identified as glucose-6-phosphate isomerase, a glycolytic enzyme. Thus, some forms of RA or related arthritides may develop by a mechanism fundamentally different from the currently popular paradigm of a joint-specific T cell response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsumoto, I -- Staub, A -- Benoist, C -- Mathis, D -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1732-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Genetique et de Biologie Moleculaire et Cellulaire (CNRS/INSERM/ULP), BP 163, 67404 Illkirch, C.U. de Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10576739" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigen-Antibody Complex/immunology/metabolism ; Arthritis, Rheumatoid/*immunology ; Autoantibodies/*immunology ; Autoantigens/*immunology ; B-Lymphocytes/*immunology ; Cross Reactions ; Disease Models, Animal ; Glucose-6-Phosphate Isomerase/chemistry/*immunology ; Humans ; Immunoglobulins/immunology ; Joints/immunology ; Mice ; Mice, Inbred C57BL ; Mice, Inbred NOD ; Mice, Transgenic ; Recombinant Fusion Proteins/immunology ; T-Lymphocytes/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 196
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    Adhesive and mammalian transglutaminase substrate properties of Candida albicans Hwp1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-05
    Description: The pathogenesis of candidiasis involves invasion of host tissues by filamentous forms of the opportunistic yeast Candida albicans. Morphology-specific gene products may confer proinvasive properties. A hypha-specific surface protein, Hwp1, with similarities to mammalian small proline-rich proteins was shown to serve as a substrate for mammalian transglutaminases. Candida albicans strains lacking Hwp1 were unable to form stable attachments to human buccal epithelial cells and had a reduced capacity to cause systemic candidiasis in mice. This represents a paradigm for microbial adhesion that implicates essential host enzymes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Staab, J F -- Bradway, S D -- Fidel, P L -- Sundstrom, P -- 1 R01 DE11375-05A2/DE/NIDCR NIH HHS/ -- AI32556/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1535-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Microbiology and Immunology, College of Medicine and Public Health, Ohio State University, 333 West Tenth Avenue, Columbus, OH 43210, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10066176" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Candida albicans/*pathogenicity/physiology ; Candidiasis/microbiology ; Candidiasis, Oral/microbiology ; Cell Adhesion ; Epithelial Cells/enzymology/microbiology ; *Fungal Proteins ; GTP Phosphohydrolases/*metabolism ; *GTP-Binding Proteins ; Genes, Fungal ; Humans ; Membrane Glycoproteins/genetics/*physiology ; Mice ; Mice, Inbred CBA ; Mouth Mucosa/enzymology/*microbiology ; Recombinant Proteins/metabolism ; Transglutaminases/*metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 197
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    A new look at MHC and autoimmune disease (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ridgway, W M -- Fasso, M -- Fathman, C G -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):749, 751.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10336398" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigen-Presenting Cells/immunology ; Autoantigens/*immunology ; Autoimmune Diseases/*immunology ; Diabetes Mellitus, Type 1/*immunology ; Genes, MHC Class II ; Histocompatibility Antigens Class II/*immunology ; Mice ; Mice, Inbred NOD ; Receptors, Antigen, T-Cell/immunology ; Self Tolerance ; T-Lymphocytes/*immunology ; Thymus Gland/*immunology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 198
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    Host defense mechanisms triggered by microbial lipoproteins through toll-like receptors (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: The generation of cell-mediated immunity against many infectious pathogens involves the production of interleukin-12 (IL-12), a key signal of the innate immune system. Yet, for many pathogens, the molecules that induce IL-12 production by macrophages and the mechanisms by which they do so remain undefined. Here it is shown that microbial lipoproteins are potent stimulators of IL-12 production by human macrophages, and that induction is mediated by Toll-like receptors (TLRs). Several lipoproteins stimulated TLR-dependent transcription of inducible nitric oxide synthase and the production of nitric oxide, a powerful microbicidal pathway. Activation of TLRs by microbial lipoproteins may initiate innate defense mechanisms against infectious pathogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brightbill, H D -- Libraty, D H -- Krutzik, S R -- Yang, R B -- Belisle, J T -- Bleharski, J R -- Maitland, M -- Norgard, M V -- Plevy, S E -- Smale, S T -- Brennan, P J -- Bloom, B R -- Godowski, P J -- Modlin, R L -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):732-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Howard Hughes Medical Institute, University of California Los Angeles School of Medicine, Los Anges, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Bacterial/chemistry/*immunology/metabolism ; Cell Line ; *Drosophila Proteins ; Gene Expression Regulation ; Humans ; Interleukin-12/*biosynthesis/genetics ; Lipopolysaccharides/immunology ; Lipoproteins/chemistry/*immunology/metabolism ; Macrophages/*immunology/metabolism ; Membrane Glycoproteins/*metabolism ; Mice ; Monocytes/*immunology/metabolism ; Mycobacterium tuberculosis/*immunology ; NF-kappa B/biosynthesis ; Nitric Oxide Synthase/genetics ; Nitric Oxide Synthase Type II ; Promoter Regions, Genetic ; Receptors, Cell Surface/*metabolism ; Signal Transduction ; Toll-Like Receptors ; Transcription, Genetic ; Transfection ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 199
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    Unknown
    Embryonic stem cell-derived glial precursors: a source of myelinating transplants (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Self-renewing, totipotent embryonic stem (ES) cells may provide a virtually unlimited donor source for transplantation. A protocol that permits the in vitro generation of precursors for oligodendrocytes and astrocytes from ES cells was devised. Transplantation in a rat model of a human myelin disease shows that these ES cell-derived precursors interact with host neurons and efficiently myelinate axons in brain and spinal cord. Thus, ES cells can serve as a valuable source of cell type-specific somatic precursors for neural transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brustle, O -- Jones, K N -- Learish, R D -- Karram, K -- Choudhary, K -- Wiestler, O D -- Duncan, I D -- McKay, R D -- NS33710/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):754-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuropathology, University of Bonn Medical Center, Sigmund-Freud-Strasse 25, 53105 Bonn, Germany. brustle@uni-bonn.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10427001" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/*cytology ; Brain/embryology/metabolism ; Cell Differentiation ; Cell Line ; Cell Movement ; Cerebral Ventricles/embryology/surgery ; Diffuse Cerebral Sclerosis of Schilder/genetics/*therapy ; Embryo, Mammalian/cytology ; Growth Substances/pharmacology ; Humans ; Male ; Mice ; Myelin Basic Protein/biosynthesis ; Myelin Proteolipid Protein/biosynthesis/genetics ; Myelin Sheath/*physiology ; Oligodendroglia/*cytology/metabolism/*transplantation/ultrastructure ; Rats ; Spinal Cord ; Stem Cell Transplantation ; Stem Cells/*cytology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 200
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    Synergy between tumor suppressor APC and the beta-catenin-Tcf4 target Tcf1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-18
    Description: Mutations in APC or beta-catenin inappropriately activate the transcription factor Tcf4, thereby transforming intestinal epithelial cells. Here it is shown that one of the target genes of Tcf4 in epithelial cells is Tcf1. The most abundant Tcf1 isoforms lack a beta-catenin interaction domain. Tcf1(-/-) mice develop adenomas in the gut and mammary glands. Introduction of a mutant APC allele into these mice substantially increases the number of these adenomas. Tcf1 may act as a feedback repressor of beta-catenin-Tcf4 target genes and thus may cooperate with APC to suppress malignant transformation of epithelial cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roose, J -- Huls, G -- van Beest, M -- Moerer, P -- van der Horn, K -- Goldschmeding, R -- Logtenberg, T -- Clevers, H -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1923-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Center for Biomedical Genetics, Department of Pathology, University Medical Center Utrecht, Post Office Box 85500, 3508 GA Utrecht, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489374" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoma/genetics/metabolism/pathology ; Adenomatous Polyposis Coli Protein ; Animals ; Cytoskeletal Proteins/*metabolism ; DNA-Binding Proteins/*genetics/metabolism ; Female ; Gene Expression Regulation, Neoplastic ; Genes, Tumor Suppressor ; Hepatocyte Nuclear Factor 1-alpha ; Humans ; Intestinal Neoplasms/genetics/metabolism/pathology ; Lymphoid Enhancer-Binding Factor 1 ; Male ; Mammary Neoplasms, Experimental/genetics/metabolism/pathology ; Mice ; Neoplasm Proteins/metabolism ; Promoter Regions, Genetic ; T Cell Transcription Factor 1 ; TCF Transcription Factors ; *Trans-Activators ; Transcription Factor 7-Like 2 Protein ; Transcription Factors/*genetics/*metabolism ; Transfection ; Tumor Cells, Cultured ; beta Catenin
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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