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  • Mice  (145)
  • Cloning, Molecular  (53)
  • American Association for the Advancement of Science (AAAS)  (181)
  • Blackwell Publishing Ltd
  • 1995-1999  (181)
  • 1980-1984
  • 1997  (181)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (181)
  • Blackwell Publishing Ltd
  • Springer  (1)
Years
  • 1995-1999  (181)
  • 1980-1984
Year
  • 1
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    Firefly gene lights up lab animals from inside out (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taubes, G -- New York, N.Y. -- Science. 1997 Jun 27;276(5321):1993.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9221506" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Recombinant ; Diagnostic Imaging/*methods ; *Gene Expression Regulation ; Genetic Therapy ; HIV/physiology ; HIV Infections/virology ; Luciferases/*genetics ; Luminescence ; Mice ; Mice, Transgenic ; Salmonella Infections, Animal/drug therapy/microbiology ; Virus Replication
    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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  • 2
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    Discrete determinants in transfer RNA for editing and aminoacylation (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-23
    Description: During translation errors of aminoacylation are corrected in editing reactions which ensure that an amino acid is stably attached to its corresponding transfer RNA (tRNA). Previous studies have not shown whether the tRNA nucleotides needed for effecting translational editing are the same as or distinct from those required for aminoacylation, but several considerations have suggested that they are the same. Here, designed tRNAs that are highly active for aminoacylation but are not active in translational editing are presented. The editing reaction can be controlled by manipulation of nucleotides at the corner of the L-shaped tRNA. In contrast, these manipulations do not affect aminoacylation. These results demonstrate the segregation of nucleotide determinants for the editing and aminoacylation functions of tRNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hale, S P -- Auld, D S -- Schmidt, E -- Schimmel, P -- GM15539/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 May 23;276(5316):1250-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, 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/9157882" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Base Sequence ; Binding Sites ; Cloning, Molecular ; Escherichia coli ; Molecular Sequence Data ; Nucleic Acid Conformation ; *RNA Editing ; RNA, Transfer/*metabolism ; RNA, Transfer, Ile/chemistry/metabolism ; RNA, Transfer, Val/chemistry/metabolism
    Print ISSN: 0036-8075
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  • 3
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    Requirement of the DEAD-Box protein ded1p for messenger RNA translation (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-07
    Description: The DED1 gene, which encodes a putative RNA helicase, has been implicated in nuclear pre-messenger RNA splicing in the yeast Saccharomyces cerevisiae. It is shown here by genetic and biochemical analysis that translation, rather than splicing, is severely impaired in two newly isolated ded1 conditional mutants. Preliminary evidence suggests that the protein Ded1p may be required for the initiation step of translation, as is the distinct DEAD-box protein, eukaryotic initiation factor 4A (eIF4A). The DED1 gene could be functionally replaced by a mouse homolog, PL10, which suggests that the function of Ded1p in translation is evolutionarily conserved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chuang, R Y -- Weaver, P L -- Liu, Z -- Chang, T H -- GM48752/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 7;275(5305):1468-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular, Cellular, and Developmental Biology Program, Ohio State University, Columbus, OH 43210, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9045610" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytoplasm/metabolism ; DEAD-box RNA Helicases ; Eukaryotic Initiation Factor-4A ; Genes, Fungal ; Mice ; Mutation ; Peptide Initiation Factors/genetics/metabolism ; Phenotype ; *Protein Biosynthesis ; RNA Helicases ; RNA Nucleotidyltransferases/genetics/*metabolism ; RNA Splicing ; RNA, Fungal/*genetics ; RNA, Messenger/*genetics ; Recombinant Fusion Proteins/metabolism ; Saccharomyces cerevisiae/enzymology/*genetics ; *Saccharomyces cerevisiae 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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  • 4
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    Can cloning help save beleaguered species? (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 1997 May 30;276(5317):1329-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9190674" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Zoo/genetics ; Cloning, Molecular ; *Conservation of Natural Resources ; Costs and Cost Analysis ; Cryopreservation ; Female ; Fibroblasts/cytology ; *Genetic Engineering/economics ; Genetic Variation ; Reproduction, Asexual ; Sheep ; Species Specificity
    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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  • 5
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    Mitochondrial and chloroplast phage-type RNA polymerases in Arabidopsis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-08
    Description: In addition to the RNA polymerases (RNAPs) transcribing the nuclear genes, eukaryotic cells also require RNAPs to transcribe the genes of the mitochondrial genome and, in plants, of the chloroplast genome. The plant Arabidopsis thaliana was found to contain two nuclear genes similar to genes encoding the mitochondrial RNAP from yeast and RNAPs of bacteriophages T7, T3, and SP6. The putative transit peptides of the two polymerases were capable of targeting fusion proteins to mitochondria and chloroplasts, respectively, in vitro. The results indicate that the mitochondrial RNAP in plants is a bacteriophage-type enzyme. A gene duplication event may have generated the second RNAP, which along with the plastid-encoded eubacteria-like RNAP could transcribe the chloroplast genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hedtke, B -- Borner, T -- Weihe, A -- New York, N.Y. -- Science. 1997 Aug 8;277(5327):809-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Humboldt University Berlin, Institute of Biology, Chausseestrasse 117, D-10115 Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9242608" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/*enzymology/genetics ; Cell Nucleus/genetics ; Chloroplasts/*enzymology ; Cloning, Molecular ; DNA-Directed RNA Polymerases/chemistry/*genetics ; Exons ; *Genes, Plant ; Introns ; Mitochondria/*enzymology ; Molecular Sequence Data ; Phylogeny ; Recombinant Fusion Proteins/metabolism ; Sequence Alignment ; T-Phages/enzymology
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  • 6
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    Angiopoietin-2, a natural antagonist for Tie2 that disrupts in vivo angiogenesis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-04
    Description: Angiogenesis is thought to depend on a precise balance of positive and negative regulation. Angiopoietin-1 (Ang1) is an angiogenic factor that signals through the endothelial cell-specific Tie2 receptor tyrosine kinase. Like vascular endothelial growth factor, Ang1 is essential for normal vascular development in the mouse. An Ang1 relative, termed angiopoietin-2 (Ang2), was identified by homology screening and shown to be a naturally occurring antagonist for Ang1 and Tie2. Transgenic overexpression of Ang2 disrupts blood vessel formation in the mouse embryo. In adult mice and humans, Ang2 is expressed only at sites of vascular remodeling. Natural antagonists for vertebrate receptor tyrosine kinases are atypical; thus, the discovery of a negative regulator acting on Tie2 emphasizes the need for exquisite regulation of this angiogenic receptor system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maisonpierre, P C -- Suri, C -- Jones, P F -- Bartunkova, S -- Wiegand, S J -- Radziejewski, C -- Compton, D -- McClain, J -- Aldrich, T H -- Papadopoulos, N -- Daly, T J -- Davis, S -- Sato, T N -- Yancopoulos, G D -- New York, N.Y. -- Science. 1997 Jul 4;277(5322):55-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Regeneron Pharmaceuticals Inc., 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/9204896" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Angiopoietin-1 ; Angiopoietin-2 ; Animals ; Blood Vessels/embryology/*metabolism ; Cells, Cultured ; Cloning, Molecular ; Embryo, Mammalian/metabolism ; Endothelial Growth Factors/genetics/metabolism ; Endothelium, Vascular/*cytology/metabolism ; Female ; Humans ; Ligands ; Lymphokines/genetics/metabolism ; Membrane Glycoproteins/antagonists & inhibitors/metabolism ; Mice ; Mice, Transgenic ; Molecular Sequence Data ; *Neovascularization, Physiologic ; Phosphorylation ; Proteins/chemistry/*metabolism ; Rats ; Rats, Sprague-Dawley ; Receptor Protein-Tyrosine Kinases/*antagonists & inhibitors/metabolism ; Receptor, TIE-2 ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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  • 7
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    Requirement for macrophage elastase for cigarette smoke-induced emphysema in mice (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-09-26
    Description: To determine which proteinases are responsible for the lung destruction characteristic of pulmonary emphysema, macrophage elastase-deficient (MME-/-) mice were subjected to cigarette smoke. In contrast to wild-type mice, MME-/- mice did not have increased numbers of macrophages in their lungs and did not develop emphysema in response to long-term exposure to cigarette smoke. Smoke-exposed MME-/- mice that received monthly intratracheal instillations of monocyte chemoattractant protein-1 showed accumulation of alveolar macrophages but did not develop air space enlargement. Thus, macrophage elastase is probably sufficient for the development of emphysema that results from chronic inhalation of cigarette smoke.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hautamaki, R D -- Kobayashi, D K -- Senior, R M -- Shapiro, S D -- New York, N.Y. -- Science. 1997 Sep 26;277(5334):2002-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Washington University School of Medicine at Barnes-Jewish Hospital, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9302297" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Count ; Chemokine CCL2/pharmacology ; Gene Targeting ; Lung/pathology ; Macrophages, Alveolar/*enzymology/physiology ; Matrix Metalloproteinase 12 ; Metalloendopeptidases/genetics/*metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Inbred Strains ; Neutrophils ; Plants, Toxic ; Pulmonary Alveoli/pathology ; Pulmonary Emphysema/enzymology/*etiology/pathology ; Smoke/adverse effects ; Smoking/*adverse effects ; Tobacco
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  • 8
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    Fluorescence-based isolation of bacterial genes expressed within host cells (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-09-26
    Description: A selection strategy was devised to identify bacterial genes preferentially expressed when a bacterium associates with its host cell. Fourteen Salmonella typhimurium genes, which were under the control of at least four independent regulatory circuits, were identified to be selectively induced in host macrophages. Four genes encode virulence factors, including a component of a type III secretory apparatus. This selection methodology should be generally applicable to the identification of genes from pathogenic organisms that are induced upon association with host cells or tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Valdivia, R H -- Falkow, S -- AI26195/AI/NIAID NIH HHS/ -- DK38707/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1997 Sep 26;277(5334):2007-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA. valdivia@cmgm.stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9302299" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Proteins/genetics ; Cell Line ; Cloning, Molecular ; Female ; Flow Cytometry ; Fluorescence ; *Gene Expression Regulation, Bacterial ; Green Fluorescent Proteins ; HeLa Cells ; Humans ; Luminescent Proteins/genetics ; Macrophages/*microbiology ; Mice ; Mice, Inbred BALB C ; Microscopy, Fluorescence ; Molecular Sequence Data ; Open Reading Frames ; Promoter Regions, Genetic ; Recombinant Fusion Proteins ; Salmonella Infections, Animal/microbiology ; Salmonella typhimurium/*genetics/isolation & purification/*pathogenicity ; Spleen/microbiology ; Transcription Factors/genetics ; Virulence/genetics
    Print ISSN: 0036-8075
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  • 9
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    A mouse model with features of familial combined hyperlipidemia (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-17
    Description: Familial combined hyperlipidemia (FCHL) is a common inherited lipid disorder, affecting 1 to 2 percent of the population in Westernized societies. Individuals with FCHL have large quantities of very low density lipoprotein (VLDL) and low density lipoprotein (LDL) and develop premature coronary heart disease. A mouse model displaying some of the features of FCHL was created by crossing mice carrying the human apolipoprotein C-III (APOC3) transgene with mice deficient in the LDL receptor. A synergistic interaction between the apolipoprotein C-III and the LDL receptor defects produced large quantities of VLDL and LDL and enhanced the development of atherosclerosis. This mouse model may provide clues to the origin of human FCHL.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masucci-Magoulas, L -- Goldberg, I J -- Bisgaier, C L -- Serajuddin, H -- Francone, O L -- Breslow, J L -- Tall, A R -- HL 21006/HL/NHLBI NIH HHS/ -- HL 54591/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1997 Jan 17;275(5298):391-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Columbia University, 630 West 168 Street, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8994037" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apolipoprotein C-III ; Apolipoproteins B/blood ; Apolipoproteins C/*genetics ; Apolipoproteins E/blood ; Arteriosclerosis/etiology ; Carrier Proteins/genetics ; Cholesterol/blood ; Cholesterol Ester Transfer Proteins ; Cholesterol, HDL/blood ; Cholesterol, LDL/blood ; Cholesterol, VLDL/blood ; Diet ; *Disease Models, Animal ; Disease Susceptibility ; Female ; *Glycoproteins ; Humans ; *Hyperlipidemia, Familial Combined/blood/genetics ; Hyperlipoproteinemia Type IV/genetics ; Lipoproteins/blood ; Lipoproteins, VLDL/blood ; Male ; Mice ; Mice, Inbred C57BL ; *Mice, Transgenic ; Receptors, LDL/*genetics/metabolism ; Transgenes ; Triglycerides/blood
    Print ISSN: 0036-8075
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  • 10
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    Formation of actin stress fibers and focal adhesions enhanced by Rho-kinase (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-28
    Description: The small guanosine triphosphatase (GTPase) Rho is implicated in the formation of stress fibers and focal adhesions in fibroblasts stimulated by extracellular signals such as lysophosphatidic acid (LPA). Rho-kinase is activated by Rho and may mediate some biological effects of Rho. Microinjection of the catalytic domain of Rho-kinase into serum-starved Swiss 3T3 cells induced the formation of stress fibers and focal adhesions, whereas microinjection of the inactive catalytic domain, the Rho-binding domain, or the pleckstrin-homology domain inhibited the LPA-induced formation of stress fibers and focal adhesions. Thus, Rho-kinase appears to mediate signals from Rho and to induce the formation of stress fibers and focal adhesions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Amano, M -- Chihara, K -- Kimura, K -- Fukata, Y -- Nakamura, N -- Matsuura, Y -- Kaibuchi, K -- New York, N.Y. -- Science. 1997 Feb 28;275(5304):1308-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Nara Institute of Science and Technology, Ikoma 630-01, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9036856" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Actins/*metabolism ; Adenosine Triphosphate/metabolism ; Animals ; Binding Sites ; *Cell Adhesion ; Cell Line ; DNA, Complementary/genetics ; Enzyme Inhibitors/pharmacology ; GTP Phosphohydrolases/metabolism ; Intracellular Signaling Peptides and Proteins ; Lysophospholipids/pharmacology ; Mice ; Mutation ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Staurosporine/pharmacology ; rho-Associated Kinases
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  • 11
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    Dictyostelium development in the absence of cAMP (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-11
    Description: Adenosine 3',5'-monophosphate (cAMP) and cAMP-dependent protein kinase (PKA) are regulators of development in many organisms. Dictyostelium uses cAMP as an extracellular chemoattractant and as an intracellular signal for differentiation. Cells that are mutant in adenylyl cyclase do not develop. Moderate expression of the catalytic subunit of PKA in adenylyl cyclase-null cells led to near-normal development without detectable accumulation of cAMP. These results suggest that all intracellular cAMP signaling is effected through PKA and that signals other than extracellular cAMP coordinate morphogenesis in Dictyostelium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, B -- Kuspa, A -- R01 GM052359/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):251-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Marrs McLean Department of Biochemistry, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9211856" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Animals ; Cloning, Molecular ; Cyclic AMP/*metabolism ; Cyclic AMP-Dependent Protein Kinases/*metabolism ; Dictyostelium/genetics/*growth & development/metabolism ; Enzyme Activation ; Gene Expression Regulation ; Genes, Protozoan ; Morphogenesis ; Signal Transduction ; Transformation, Genetic
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  • 12
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    Chemical selection for catalysis in combinatorial antibody libraries (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-14
    Description: For the past decade the immune system has been exploited as a rich source of de novo catalysts. Catalytic antibodies have been shown to have chemoselectivity, enantioselectivity, large rate accelerations, and even an ability to reroute chemical reactions. In many instances catalysts have been made for reactions for which there are no known natural or man-made enzymes. Yet, the full power of this combinatorial system can only be exploited if there was a system that allows for the direct selection of a particular function. A method that allows for the direct chemical selection for catalysis from antibody libraries was so devised, whereby the positive aspects of hybridoma technology were preserved and re-formatted in the filamentous phage system to allow direct selection of catalysis. This methodology is based on a purely chemical selection process, making it more general than biologically based selection systems because it is not limited to reaction products that perturb cellular machinery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Janda, K D -- Lo, L C -- Lo, C H -- Sim, M M -- Wang, R -- Wong, C H -- Lerner, R A -- GM-43858/GM/NIGMS NIH HHS/ -- GM-44154/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Feb 14;275(5302):945-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Scripps Research Institute, Department of Chemistry, 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/9020070" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies, Catalytic/genetics/metabolism ; Catalysis ; Cloning, Molecular ; Coliphages ; Dithiothreitol ; Enzyme-Linked Immunosorbent Assay ; Escherichia coli/genetics/metabolism ; Galactosides/metabolism ; Haptens ; Hybridomas ; Immunoglobulin Fab Fragments/genetics/metabolism ; Indoles/metabolism ; Isopropyl Thiogalactoside/metabolism ; Mice ; Nitrophenylgalactosides/metabolism ; *Peptide Library ; Polymerase Chain Reaction ; Serum Albumin, Bovine ; Transformation, Bacterial ; beta-Galactosidase/metabolism
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  • 13
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    Local hormone networks and intestinal T cell homeostasis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-28
    Description: Neuroendocrine hormones of the hypothalamus-pituitary-thyroid axis can exert positive or negative immunoregulatory effects on intestinal lymphocytes. Small intestine epithelial cells were found to express receptors for thyrotropin-releasing hormone (TRH) and to be a primary source of intestine-derived thyroid-stimulating hormone (TSH). The gene for the TSH receptor (TSH-R) was expressed in intestinal T cells but not in epithelial cells, which suggested a hormone-mediated link between lymphoid and nonhematopoietic components of the intestine. Because mice with congenitally mutant TSH-R (hyt/hyt mice) have a selectively impaired intestinal T cell repertoire, TSH may be a key immunoregulatory mediator in the intestine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, J -- Whetsell, M -- Klein, J R -- DK35566/DK/NIDDK NIH HHS/ -- R01 DK035566/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 28;275(5308):1937-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Science and Mervin Bovaird Center for Studies in Molecular Biology and Biotechnology, University of Tulsa, Tulsa, OK 74104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9072972" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Homeostasis ; *Immunity, Mucosal ; Intestinal Mucosa/cytology/*immunology/metabolism ; Intestine, Small/cytology/immunology/metabolism ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Nude ; Point Mutation ; Receptors, Thyrotropin/genetics/metabolism ; Receptors, Thyrotropin-Releasing Hormone/genetics/metabolism ; T-Lymphocyte Subsets/immunology/metabolism ; T-Lymphocytes/*immunology/metabolism ; Thyrotropin/genetics/*metabolism ; Thyrotropin-Releasing Hormone/*metabolism/pharmacology
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  • 14
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    Receptor offers clues to how 'good' cholesterol works (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Husten, L -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1228.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9411750" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/metabolism ; Animals ; Antigens, CD36/genetics/*metabolism ; Arteriosclerosis/etiology/metabolism ; *Carrier Proteins ; Cholesterol/blood/metabolism ; Cloning, Molecular ; Humans ; Lipoproteins, HDL/blood/*metabolism ; Liver/metabolism ; *Membrane Proteins ; Mice ; Mice, Knockout ; *RNA-Binding Proteins ; *Receptors, Immunologic ; Receptors, Lipoprotein/genetics/*metabolism ; Receptors, Scavenger ; Scavenger Receptors, Class B
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 15
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    Mammalian genome debate heats up (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1997 Mar 21;275(5307):1733.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9122675" target="_blank"〉PubMed〈/a〉
    Keywords: Advisory Committees ; Animal Husbandry ; Animals ; Animals, Genetically Modified ; *Bioethics ; Cloning, Molecular ; Federal Government ; *Genetic Engineering ; Genetic Research ; Government Regulation ; Humans ; Public Policy ; Risk Assessment ; United States
    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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  • 16
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    Requirement for Valpha14 NKT cells in IL-12-mediated rejection of tumors (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: A lymphocyte subpopulation, the Valpha14 natural killer T (NKT) cells, expresses both NK1.1 and a single invariant T cell receptor encoded by the Valpha14 and Jalpha281 gene segments. Mice with a deletion of the Jalpha281 gene segment were found to exclusively lack this subpopulation. The Valpha14 NKT cell-deficient mice could no longer mediate the interleukin-12 (IL-12)-induced rejection of tumors. Although the antitumor effect of IL-12 was thought to be mediated through natural killer cells and T cells, Valpha14 NKT cells were found to be an essential target of IL-12, and they mediated their cytotoxicity by an NK-like effector mechanism after activation with IL-12.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cui, J -- Shin, T -- Kawano, T -- Sato, H -- Kondo, E -- Toura, I -- Kaneko, Y -- Koseki, H -- Kanno, M -- Taniguchi, M -- New York, N.Y. -- Science. 1997 Nov 28;278(5343):1623-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Core Research for Evolutional Science and Technology (CREST) Project, Japan Science and Technology Corporation (JST), 1-8-1 Inohana, Chuo-ku, Chiba, Japan 260.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9374462" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/pharmacology ; *Cytotoxicity, Immunologic ; Gene Deletion ; Gene Targeting ; Genes, RAG-1 ; Genes, T-Cell Receptor alpha ; Interferon-gamma/immunology ; Interleukin-12/*immunology ; Killer Cells, Natural/*immunology ; *Macrolides ; Melanoma, Experimental/immunology ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neoplasms, Experimental/*immunology ; Poly I-C/pharmacology ; Proton-Translocating ATPases/antagonists & inhibitors ; Receptors, Antigen, T-Cell, alpha-beta/genetics/*immunology ; T-Lymphocyte Subsets/*immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Panel weighs a law against cloning (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1997 May 23;276(5316):1185-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9182324" target="_blank"〉PubMed〈/a〉
    Keywords: Advisory Committees ; Animals ; *Bioethics ; Cloning, Molecular ; Embryo Research ; Embryo, Mammalian ; *Ethics Committees ; Federal Government ; Financing, Government/legislation & jurisprudence ; Genetic Engineering/*legislation & jurisprudence ; *Government Regulation ; Humans ; Nuclear Transfer Techniques ; Private Sector/legislation & jurisprudence ; Public Policy ; Research Support as Topic/*legislation & jurisprudence ; Sheep
    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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  • 18
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    Gene discovery offers tentative clues to Parkinson's (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1997 Jun 27;276(5321):1973.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9221499" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; Chromosomes, Human, Pair 4 ; Genetic Markers ; Humans ; Lewy Bodies/chemistry ; Mice ; Mice, Transgenic ; Nerve Tissue Proteins/analysis/chemistry/*genetics ; Oxidative Stress ; Parkinson Disease/etiology/*genetics ; Point Mutation ; Protein Conformation ; Protein Folding ; Rats ; Synucleins
    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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  • 19
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    A euryarchaeal lysyl-tRNA synthetase: resemblance to class I synthetases (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-14
    Description: The sequencing of euryarchaeal genomes has suggested that the essential protein lysyl-transfer RNA (tRNA) synthetase (LysRS) is absent from such organisms. However, a single 62-kilodalton protein with canonical LysRS activity was purified from Methanococcus maripaludis, and the gene that encodes this protein was cloned. The predicted amino acid sequence of M. maripaludis LysRS is similar to open reading frames of unassigned function in both Methanobacterium thermoautotrophicum and Methanococcus jannaschii but is unrelated to canonical LysRS proteins reported in eubacteria, eukaryotes, and the crenarchaeote Sulfolobus solfataricus. The presence of amino acid motifs characteristic of the Rossmann dinucleotide-binding domain identifies M. maripaludis LysRS as a class I aminoacyl-tRNA synthetase, in contrast to the known examples of this enzyme, which are class II synthetases. These data question the concept that the classification of aminoacyl-tRNA synthetases does not vary throughout living systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ibba, M -- Morgan, S -- Curnow, A W -- Pridmore, D R -- Vothknecht, U C -- Gardner, W -- Lin, W -- Woese, C R -- Soll, D -- New York, N.Y. -- Science. 1997 Nov 7;278(5340):1119-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biophysics and Biochemistry, Yale University, Post Office Box 208114, 266 Whitney Avenue, New Haven, CT 06520-8114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9353192" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; Amino Acid Sequence ; Animals ; Bacteria/enzymology ; Cloning, Molecular ; Electrophoresis, Polyacrylamide Gel ; Euryarchaeota/enzymology/genetics ; Evolution, Molecular ; Genes, Archaeal ; Humans ; Kinetics ; Lysine-tRNA Ligase/*chemistry/*classification/genetics/metabolism ; Methanococcus/*enzymology/genetics ; Molecular Sequence Data ; Phylogeny ; RNA, Transfer, Amino Acyl/biosynthesis ; Sequence Alignment ; Sulfolobus/enzymology
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  • 20
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    Peptide agonist of the thrombopoietin receptor as potent as the natural cytokine (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-13
    Description: Two families of small peptides that bind to the human thrombopoietin receptor and compete with the binding of the natural ligand thrombopoietin (TPO) were identified from recombinant peptide libraries. The sequences of these peptides were not found in the primary sequence of TPO. Screening libraries of variants of one of these families under affinity-selective conditions yielded a 14-amino acid peptide (Ile-Glu-Gly-Pro-Thr-Leu-Arg-Gln-Trp-Leu-Ala-Ala-Arg-Ala) with high affinity (dissociation constant approximately 2 nanomolar) that stimulates the proliferation of a TPO-responsive Ba/F3 cell line with a median effective concentration (EC50) of 400 nanomolar. Dimerization of this peptide by a carboxyl-terminal linkage to a lysine branch produced a compound with an EC50 of 100 picomolar, which was equipotent to the 332-amino acid natural cytokine in cell-based assays. The peptide dimer also stimulated the in vitro proliferation and maturation of megakaryocytes from human bone marrow cells and promoted an increase in platelet count when administered to normal mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cwirla, S E -- Balasubramanian, P -- Duffin, D J -- Wagstrom, C R -- Gates, C M -- Singer, S C -- Davis, A M -- Tansik, R L -- Mattheakis, L C -- Boytos, C M -- Schatz, P J -- Baccanari, D P -- Wrighton, N C -- Barrett, R W -- Dower, W J -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1696-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Affymax Research Institute, 4001 Miranda Avenue, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180079" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding, Competitive ; Blood Platelets/cytology ; Cell Division ; Cell Line ; Cells, Cultured ; Consensus Sequence ; Dimerization ; Erythropoietin/pharmacology ; Hematopoiesis/drug effects ; Humans ; Megakaryocytes/cytology ; Mice ; Molecular Sequence Data ; *Neoplasm Proteins ; Oligopeptides/*metabolism/*pharmacology ; Peptide Library ; Peptides/metabolism/pharmacology ; Platelet Count ; Proto-Oncogene Proteins/*agonists/metabolism ; *Receptors, Cytokine ; Receptors, Thrombopoietin ; Recombinant Proteins/metabolism/pharmacology ; Thrombopoietin/*metabolism/pharmacology ; Transfection
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  • 21
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    Protective role for prion protein? (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1997 Nov 21;278(5342):1404-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9411764" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Copper/*metabolism/toxicity ; Copper Sulfate/poisoning ; Mice ; Mice, Knockout ; Neurons/drug effects/physiology ; PrPC Proteins/genetics/*metabolism ; Prion Diseases/etiology
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  • 22
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    CD1d-restricted and TCR-mediated activation of valpha14 NKT cells by glycosylceramides (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: Natural killer T (NKT) lymphocytes express an invariant T cell antigen receptor (TCR) encoded by the Valpha14 and Jalpha281 gene segments. A glycosylceramide-containing alpha-anomeric sugar with a longer fatty acyl chain (C26) and sphingosine base (C18) was identified as a ligand for this TCR. Glycosylceramide-mediated proliferative responses of Valpha14 NKT cells were abrogated by treatment with chloroquine-concanamycin A or by monoclonal antibodies against CD1d/Vbeta8, CD40/CD40L, or B7/CTLA-4/CD28, but not by interference with the function of a transporter-associated protein. Thus, this lymphocyte shares distinct recognition systems with either T or NK cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawano, T -- Cui, J -- Koezuka, Y -- Toura, I -- Kaneko, Y -- Motoki, K -- Ueno, H -- Nakagawa, R -- Sato, H -- Kondo, E -- Koseki, H -- Taniguchi, M -- New York, N.Y. -- Science. 1997 Nov 28;278(5343):1626-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CREST (Core Research for Evolutional Science and Technology) Project, Japan Science and Technology Corporation (JST), 1-8-1 Inohana, Chuo, Chiba 260, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9374463" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD1/*immunology ; Carbohydrate Conformation ; Cells, Cultured ; Ceramides/chemistry/metabolism/*pharmacology ; Cerebrosides/chemistry/metabolism/*pharmacology ; Coculture Techniques ; Galactosylceramides/chemistry/metabolism/pharmacology ; Glucosylceramides/chemistry/metabolism/pharmacology ; Killer Cells, Natural/*immunology ; Ligands ; *Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Receptors, Antigen, T-Cell, alpha-beta/*immunology ; Structure-Activity Relationship ; T-Lymphocyte Subsets/*immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 23
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    New clues found to circadian clocks--including mammals' (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 1997 May 16;276(5315):1030-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9173537" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Clocks/*genetics ; CLOCK Proteins ; Chromosome Mapping ; Circadian Rhythm/*genetics ; Cloning, Molecular ; Gene Expression Regulation ; Mice ; Mutation ; Trans-Activators/chemistry/*genetics/physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 24
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    A macrophage invasion mechanism of pathogenic mycobacteria (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-22
    Description: Tuberculosis is the leading cause of death due to an infectious organism, killing an estimated 3 million people annually. Mycobacterium tuberculosis, the causative agent of tuberculosis, and other pathogenic mycobacteria require entry into host macrophages to initiate infection. An invasion mechanism was defined that was shared among pathogenic mycobacteria including M. tuberculosis, M. leprae, and M. avium but not by nonpathogenic mycobacteria or nonmycobacterial intramacrophage pathogens. This pathway required the association of the complement cleavage product C2a with mycobacteria resulting in the formation of a C3 convertase. The mycobacteria-associated C2a cleaved C3, resulting in C3b opsonization of the mycobacteria and recognition by macrophages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schorey, J S -- Carroll, M C -- Brown, E J -- AI33348/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1091-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, 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/9262476" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Complement C2/*physiology ; Complement C2a ; Complement C3/metabolism ; Complement C3-C5 Convertases/metabolism ; Complement C3b/immunology ; Horses ; Humans ; In Vitro Techniques ; Isoflurophate/pharmacology ; Macrophages/immunology/*microbiology ; Mice ; Molecular Sequence Data ; Mycobacterium/*pathogenicity ; Mycobacterium avium Complex/immunology/*pathogenicity ; Mycobacterium bovis/immunology/pathogenicity ; Mycobacterium leprae/immunology/pathogenicity ; Mycobacterium tuberculosis/immunology/pathogenicity ; Opsonin Proteins ; Virulence
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  • 25
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    Reduced ubiquitin-dependent degradation of c-Jun after phosphorylation by MAP kinases (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-17
    Description: The proto-oncogene-encoded transcription factor c-Jun activates genes in response to a number of inducers that act through mitogen-activated protein kinase (MAPK) signal transduction pathways. The activation of c-Jun after phosphorylation by MAPK is accompanied by a reduction in c-Jun ubiquitination and consequent stabilization of the protein. These results illustrate the relevance of regulated protein degradation in the signal-dependent control of gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Musti, A M -- Treier, M -- Bohmann, D -- New York, N.Y. -- Science. 1997 Jan 17;275(5298):400-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Meyerhofstr. 1, 69117 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8994040" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Cell Cycle Proteins/metabolism ; GTP-Binding Proteins/metabolism ; Gene Expression Regulation ; JNK Mitogen-Activated Protein Kinases ; Mice ; *Mitogen-Activated Protein Kinases ; Phosphorylation ; Proto-Oncogene Proteins c-jun/*metabolism ; Signal Transduction ; Transfection ; Ubiquitins/*metabolism ; cdc42 GTP-Binding Protein, Saccharomyces cerevisiae
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  • 26
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    Structural and functional conservation of the Caenorhabditis elegans timing gene clk-1 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-14
    Description: Mutations in the Caenorhabditis elegans gene clk-1 affect biological timing and extend longevity. The gene clk-1 was identified, and the cloned gene complemented the clk-1 phenotypes and restored normal longevity. The CLK-1 protein was found to be conserved among eukaryotes, including humans, and structurally similar to the yeast metabolic regulator Cat5p (also called Coq7p). These proteins contain a tandem duplication of a core 82-residue domain. clk-1 complemented the phenotype of cat5/coq7 null mutants, demonstrating that clk-1 and CAT5/COQ7 share biochemical function and that clk-1 acts at the level of cellular physiology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ewbank, J J -- Barnes, T M -- Lakowski, B -- Lussier, M -- Bussey, H -- Hekimi, S -- New York, N.Y. -- Science. 1997 Feb 14;275(5302):980-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, McGill University, 1205 Avenue Docteur Penfield, Montreal, Quebec, Canada H3A 1B1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9020081" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Caenorhabditis elegans/*genetics/metabolism/*physiology ; *Caenorhabditis elegans Proteins ; Cell Aging/*genetics ; Chromosome Mapping ; Conserved Sequence ; Exons ; Fungal Proteins/chemistry/genetics/physiology ; *Genes, Helminth ; Genetic Complementation Test ; Glycerol/metabolism ; Helminth Proteins/chemistry/*genetics/physiology ; Humans ; Longevity/genetics ; Mice ; Molecular Sequence Data ; Phenotype ; Protein Structure, Secondary ; Protein Structure, Tertiary ; RNA Splicing ; *Saccharomyces cerevisiae Proteins
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 27
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    New vaccines may ward off urinary tract infections (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-04-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):533.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9148412" target="_blank"〉PubMed〈/a〉
    Keywords: Adhesins, Bacterial/*immunology ; *Adhesins, Escherichia coli ; Animals ; Antibodies, Bacterial/biosynthesis ; *Bacterial Vaccines/administration & dosage/immunology ; Clinical Trials as Topic ; Escherichia coli/*immunology ; Escherichia coli Infections/*prevention & control ; Female ; *Fimbriae Proteins ; Humans ; Immunoglobulin G/biosynthesis ; Mice ; Urinary Tract Infections/immunology/*prevention & control ; Vaccination ; Vaccines, Inactivated/administration & dosage/immunology ; *Vaccines, Synthetic/administration & dosage/immunology
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  • 28
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    Mouse engineering (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-08-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Gorman, S -- Wahl, G M -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1025.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9289845" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA Nucleotidyltransferases/*metabolism ; *Genetic Engineering ; Integrases/metabolism ; Licensure ; Mice ; *Mice, Transgenic ; *Viral Proteins
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  • 29
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    Severe fibronectin-deposit renal glomerular disease in mice lacking uteroglobin (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-30
    Description: Despite myriads of biological activities ascribed to uteroglobin (UG), a steroid-inducible secreted protein, its physiological functions are unknown. Mice in which the uteroglobin gene was disrupted had severe renal disease that was associated with massive glomerular deposition of predominantly multimeric fibronectin (Fn). The molecular mechanism that normally prevents Fn deposition appears to involve high-affinity binding of UG with Fn to form Fn-UG heteromers that counteract Fn self-aggregation, which is required for abnormal tissue deposition. Thus, UG is essential for maintaining normal renal function in mice, which raises the possibility that an analogous pathogenic mechanism may underlie genetic Fn-deposit human glomerular disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Z -- Kundu, G C -- Yuan, C J -- Ward, J M -- Lee, E J -- DeMayo, F -- Westphal, H -- Mukherjee, A B -- HL47620/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1997 May 30;276(5317):1408-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section on Developmental Genetics, Heritable Disorders Branch, National Institute of Child Health and Human Development (NICHD), National Insitutes of Health (NIH), Bethesda, MD 20892-1830, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9162006" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Crosses, Genetic ; Fibronectins/*metabolism ; Gene Targeting ; Humans ; Kidney Diseases/embryology/genetics/pathology ; *Kidney Glomerulus/embryology/metabolism/ultrastructure ; Mice ; Mice, Inbred C57BL ; Uteroglobin/deficiency/genetics/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Rapid colorectal adenoma formation initiated by conditional targeting of the Apc gene (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-06
    Description: Familial adenomatous polyposis coli (FAP) is a disease characterized by the development of multiple colorectal adenomas, and affected individuals carry germline mutations in the APC gene. With the use of a conditional gene targeting system, a mouse model of FAP was created that circumvents the embryonic lethality of Apc deficiency and directs Apc inactivation specifically to the colorectal epithelium. loxP sites were inserted into the introns around Apc exon 14, and the resultant mutant allele (Apc580S) was introduced into the mouse germline. Mice homozygous for Apc580S were normal; however, upon infection of the colorectal region with an adenovirus encoding the Cre recombinase, the mice developed adenomas within 4 weeks. The adenomas showed deletion of Apc exon 14, indicating that the loss of Apc function was caused by Cre-loxP-mediated recombination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shibata, H -- Toyama, K -- Shioya, H -- Ito, M -- Hirota, M -- Hasegawa, S -- Matsumoto, H -- Takano, H -- Akiyama, T -- Toyoshima, K -- Kanamaru, R -- Kanegae, Y -- Saito, I -- Nakamura, Y -- Shiba, K -- Noda, T -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):120-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Cancer Institute, Toshima-ku, Tokyo 170, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9311916" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli/*genetics ; Adenomatous Polyposis Coli Protein ; Adenoviridae/genetics ; Animals ; Colon/metabolism ; Cytoskeletal Proteins/biosynthesis ; Disease Models, Animal ; Exons ; Female ; Frameshift Mutation ; Gene Deletion ; *Gene Targeting ; *Genes, APC ; Genetic Vectors ; Germ-Line Mutation ; Homozygote ; Integrases/genetics/metabolism ; Introns ; Male ; Mice ; Mice, Inbred C57BL ; Recombination, Genetic ; *Viral Proteins
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    Transmission of hepatitis C by intrahepatic inoculation with transcribed RNA (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-25
    Description: More than 1% of the world's population is chronically infected with hepatitis C virus (HCV). HCV infection can result in acute hepatitis, chronic hepatitis, and cirrhosis, which is strongly associated with development of hepatocellular carcinoma. Genetic studies of HCV replication have been hampered by lack of a bona fide infectious molecular clone. Full-length functional clones of HCV complementary DNA were constructed. RNA transcripts from the clones were found to be infectious and to cause disease in chimpanzees after direct intrahepatic inoculation. This work defines the structure of a functional HCV genome RNA and proves that HCV alone is sufficient to cause disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolykhalov, A A -- Agapov, E V -- Blight, K J -- Mihalik, K -- Feinstone, S M -- Rice, C M -- AI40034/AI/NIAID NIH HHS/ -- CA57973/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Jul 25;277(5325):570-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Microbiology, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110-1093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9228008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cloning, Molecular ; Consensus Sequence ; DNA, Complementary ; Hepacivirus/*genetics/physiology ; Hepatitis C/*transmission/*virology ; Liver/*virology ; Molecular Sequence Data ; Pan troglodytes ; Polymerase Chain Reaction ; RNA, Messenger/*genetics ; RNA, Viral/blood/*genetics ; Transfection ; Viremia ; Virus Replication
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  • 32
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    Inducible expression and phosphorylation of coactivator BOB.1/OBF.1 in T cells (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-11
    Description: BOB.1/OBF.1 is a transcriptional coactivator that is constitutively expressed in B cells and interacts with the Oct1 and Oct2 transcription factors. Upon activation of Jurkat T cells and primary murine thymocytes with phorbol esters and ionomycin, BOB.1/OBF.1 expression and transactivation function were induced. BOB.1/OBF.1 was phosphorylated at Ser184 both in vivo and in vitro, and this modification was required for inducible activation. Mutation of Ser184 also diminished transactivation function in B cells, suggesting that the activating phosphorylation that is inducible in T cells is constitutively present in B cells. Thus, BOB.1/OBF.1 is a transcriptional coactivator that is critically regulated by posttranslational modifications to mediate cell type-specific gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zwilling, S -- Dieckmann, A -- Pfisterer, P -- Angel, P -- Wirth, T -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):221-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MSZ, Institut fur Medizinische Strahlenkunde und Zellforschung, Universitat Wurzburg, Versbacher Strasse 5, 97078 Wurzburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9211847" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Lymphocytes/metabolism ; Cells, Cultured ; *DNA-Binding Proteins ; *Gene Expression Regulation ; HeLa Cells ; Homeodomain Proteins/metabolism ; Host Cell Factor C1 ; Humans ; Immunosuppressive Agents/pharmacology ; Ionomycin/pharmacology ; Jurkat Cells ; *Lymphocyte Activation ; Mice ; Molecular Sequence Data ; Octamer Transcription Factor-1 ; Phosphorylation ; Phosphoserine/metabolism ; Recombinant Fusion Proteins/metabolism ; T-Lymphocytes/immunology/*metabolism ; Tetradecanoylphorbol Acetate/pharmacology ; Trans-Activators/genetics/*metabolism ; Transcription Factors/metabolism ; *Transcriptional Activation
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  • 33
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    Conservation of the Chk1 checkpoint pathway in mammals: linkage of DNA damage to Cdk regulation through Cdc25 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-09-05
    Description: In response to DNA damage, mammalian cells prevent cell cycle progression through the control of critical cell cycle regulators. A human gene was identified that encodes the protein Chk1, a homolog of the Schizosaccharomyces pombe Chk1 protein kinase, which is required for the DNA damage checkpoint. Human Chk1 protein was modified in response to DNA damage. In vitro Chk1 bound to and phosphorylated the dual-specificity protein phosphatases Cdc25A, Cdc25B, and Cdc25C, which control cell cycle transitions by dephosphorylating cyclin-dependent kinases. Chk1 phosphorylates Cdc25C on serine-216. As shown in an accompanying paper by Peng et al. in this issue, serine-216 phosphorylation creates a binding site for 14-3-3 protein and inhibits function of the phosphatase. These results suggest a model whereby in response to DNA damage, Chk1 phosphorylates and inhibits Cdc25C, thus preventing activation of the Cdc2-cyclin B complex and mitotic entry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanchez, Y -- Wong, C -- Thoma, R S -- Richman, R -- Wu, Z -- Piwnica-Worms, H -- Elledge, S J -- GM17763/GM/NIGMS NIH HHS/ -- GM44664/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Sep 5;277(5331):1497-501.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Marrs McLean Department of Biochemistry, Howard Hughes Medical Institute, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9278511" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Amino Acid Sequence ; Animals ; CDC2 Protein Kinase/*metabolism ; Cell Cycle Proteins/antagonists & inhibitors/*metabolism ; Chromosome Mapping ; Chromosomes, Human, Pair 11 ; Cytoskeletal Proteins ; *DNA Damage ; *F-Box Proteins ; G2 Phase ; HeLa Cells ; Humans ; Mice ; *Mitosis ; Molecular Sequence Data ; Phosphoprotein Phosphatases/metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Protein Kinases/chemistry/genetics/*metabolism ; Protein Tyrosine Phosphatases/metabolism ; Proteins/metabolism ; Recombinant Fusion Proteins/metabolism ; Schizosaccharomyces pombe Proteins ; Signal Transduction ; Transfection ; *Tyrosine 3-Monooxygenase ; *Ubiquitin-Protein Ligases ; *cdc25 Phosphatases
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    New studies affirm BSE-human link (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, N -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9340753" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*pathology ; Brain Chemistry ; Cattle ; Creutzfeldt-Jakob Syndrome/pathology/*transmission ; Encephalopathy, Bovine Spongiform/pathology/*transmission ; Humans ; Mice ; Mice, Transgenic ; Prions/*chemistry
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  • 35
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    Synapse elimination: for nerves it's all or nothing (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frank, E -- New York, N.Y. -- Science. 1997 Jan 17;275(5298):324-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA 15261, USA. efrank+@pitt.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005555" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism ; Action Potentials ; Animals ; Axons/physiology ; Central Nervous System/physiology ; Mice ; Motor Neurons/*physiology ; Muscle Fibers, Skeletal/physiology ; Neuromuscular Junction/*physiology ; Receptors, Cholinergic/metabolism ; Synapses/*physiology ; *Synaptic Transmission
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    Crystal structure of mouse CD1: An MHC-like fold with a large hydrophobic binding groove (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-18
    Description: CD1 represents a third lineage of antigen-presenting molecules that are distantly related to major histocompatibility complex (MHC) molecules in the immune system. The crystal structure of mouse CD1d1, corresponding to human CD1d, at 2.8 resolution shows that CD1 adopts an MHC fold that is more closely related to that of MHC class I than to that of MHC class II. The binding groove, although significantly narrower, is substantially larger because of increased depth and it has only two major pockets that are almost completely hydrophobic. The extreme hydrophobicity and shape of the binding site are consistent with observations that human CD1b and CD1c can present mycobacterial cell wall antigens, such as mycolic acid and lipoarabinomannans. However, mouse CD1d1 can present very hydrophobic peptides, but must do so in a very different way from MHC class Ia and class II molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zeng, Z -- Castano, A R -- Segelke, B W -- Stura, E A -- Peterson, P A -- Wilson, I A -- CA-58896/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Jul 18;277(5324):339-45.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and the Skaggs Institute for Chemical Biology at 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/9219685" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Antigens, CD1/*chemistry/immunology/metabolism ; Binding Sites ; Crystallization ; Crystallography, X-Ray ; Glycolipids/chemistry/immunology/metabolism ; Histocompatibility Antigens Class I/chemistry ; Histocompatibility Antigens Class II/chemistry ; Humans ; Hydrogen Bonding ; Ligands ; Lipid Metabolism ; Lipids/chemistry/immunology ; Mice ; Models, Molecular ; *Protein Conformation ; *Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; T-Lymphocyte Subsets/immunology
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    A gut reaction: lymphoepithelial communication in the intestine (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shanahan, F -- New York, N.Y. -- Science. 1997 Mar 28;275(5308):1897-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, National University of Ireland, Cork, University Hospital, Cork, Ireland. fshanahan@iruccvax.ucc.ie〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9122691" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CD8-Positive T-Lymphocytes/cytology/immunology/metabolism ; Cell Communication ; Cell Division ; *Immunity, Mucosal ; Intestinal Mucosa/cytology/*immunology/metabolism ; Lymphocyte Activation ; Mice ; Receptors, Thyrotropin-Releasing Hormone/metabolism ; T-Lymphocytes/cytology/*immunology/metabolism ; Thyrotropin/*metabolism/pharmacology ; Thyrotropin-Releasing Hormone/*metabolism/pharmacology
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    Identification of a naturally occurring peroxidase-lipoxygenase fusion protein (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-09-26
    Description: A distant relative of catalase that is specialized for metabolism of a fatty acid hydroperoxide was identified. This heme peroxidase occurs in coral as part of a fusion protein, the other component of which is a lipoxygenase that forms the hydroperoxide substrate. The end product is an unstable epoxide (an allene oxide) that is a potential precursor of prostaglandin-like molecules. These results extend the known chemistry of catalase-like proteins and reveal a distinct type of enzymatic construct involved in the metabolism of polyunsaturated fatty acids.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koljak, R -- Boutaud, O -- Shieh, B H -- Samel, N -- Brash, A R -- GM49502/GM/NIGMS NIH HHS/ -- TW00404/TW/FIC NIH HHS/ -- New York, N.Y. -- Science. 1997 Sep 26;277(5334):1994-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232-6602, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9302294" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Arachidonic Acid/metabolism ; Binding Sites ; Catalase/chemistry ; Catalysis ; Cloning, Molecular ; Cnidaria/*enzymology/genetics ; Hydrogen Peroxide/metabolism ; *Intramolecular Oxidoreductases ; Isomerases/chemistry ; Lipoxygenase/*chemistry/genetics/isolation & purification/metabolism ; Molecular Sequence Data ; Peroxidase/*chemistry/genetics/isolation & purification/metabolism ; Peroxidases/*chemistry/isolation & purification/metabolism ; Recombinant Proteins/metabolism ; Sequence Homology, Amino Acid
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  • 39
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    Caspase-3-generated fragment of gelsolin: effector of morphological change in apoptosis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-10
    Description: The caspase-3 (CPP32, apopain, YAMA) family of cysteinyl proteases has been implicated as key mediators of apoptosis in mammalian cells. Gelsolin was identified as a substrate for caspase-3 by screening the translation products of small complementary DNA pools for sensitivity to cleavage by caspase-3. Gelsolin was cleaved in vivo in a caspase-dependent manner in cells stimulated by Fas. Caspase-cleaved gelsolin severed actin filaments in vitro in a Ca2+-independent manner. Expression of the gelsolin cleavage product in multiple cell types caused the cells to round up, detach from the plate, and undergo nuclear fragmentation. Neutrophils isolated from mice lacking gelsolin had delayed onset of both blebbing and DNA fragmentation, following apoptosis induction, compared with wild-type neutrophils. Thus, cleaved gelsolin may be one physiological effector of morphologic change during apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kothakota, S -- Azuma, T -- Reinhard, C -- Klippel, A -- Tang, J -- Chu, K -- McGarry, T J -- Kirschner, M W -- Koths, K -- Kwiatkowski, D J -- Williams, L T -- P01 HL48743/HL/NHLBI NIH HHS/ -- R01 HL54188/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 10;278(5336):294-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Chiron Corporation, Emeryville, CA 94608, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9323209" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Amino Acid Chloromethyl Ketones/pharmacology ; Animals ; Antigens, CD95/physiology ; *Apoptosis ; Caspase 3 ; *Caspases ; Cell Line ; *Cell Size ; Cycloheximide/pharmacology ; Cysteine Endopeptidases/*metabolism ; Cysteine Proteinase Inhibitors/pharmacology ; Cytoskeleton/metabolism ; DNA Fragmentation ; Gelsolin/*metabolism ; Humans ; Mice ; Neutrophils/cytology/metabolism ; Recombinant Proteins/metabolism ; Transfection ; Tumor Cells, Cultured ; Tumor Necrosis Factor-alpha/pharmacology
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  • 40
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    Antagonism of central melanocortin receptors in vitro and in vivo by agouti-related protein (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-06
    Description: Expression of Agouti protein is normally limited to the skin where it affects pigmentation, but ubiquitous expression causes obesity. An expressed sequence tag was identified that encodes Agouti-related protein, whose RNA is normally expressed in the hypothalamus and whose levels were increased eightfold in ob/ob mice. Recombinant Agouti-related protein was a potent, selective antagonist of Mc3r and Mc4r, melanocortin receptor subtypes implicated in weight regulation. Ubiquitous expression of human AGRP complementary DNA in transgenic mice caused obesity without altering pigmentation. Thus, Agouti-related protein is a neuropeptide implicated in the normal control of body weight downstream of leptin signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ollmann, M M -- Wilson, B D -- Yang, Y K -- Kerns, J A -- Chen, Y -- Gantz, I -- Barsh, G S -- EY07106/EY/NEI NIH HHS/ -- GM07365/GM/NIGMS NIH HHS/ -- P30DK-34933/DK/NIDDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):135-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Howard Hughes Medical Institute, 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/9311920" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/metabolism ; Amino Acid Sequence ; Animals ; Female ; Humans ; Hypothalamus/metabolism ; Male ; Melanocyte-Stimulating Hormones/antagonists & inhibitors/pharmacology ; Melanophores/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Inbred CBA ; Mice, Obese ; Mice, Transgenic ; Molecular Sequence Data ; Obesity/etiology ; Organophosphorus Compounds/pharmacology ; Proteins/chemistry/genetics/pharmacology/*physiology ; RNA/genetics/metabolism ; Receptor, Melanocortin, Type 3 ; Receptor, Melanocortin, Type 4 ; Receptors, Corticotropin/*antagonists & inhibitors/metabolism ; Receptors, Peptide/*antagonists & inhibitors/metabolism ; Recombinant Proteins/metabolism ; Signal Transduction ; Xenopus
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    Constitutive transcriptional activation by a beta-catenin-Tcf complex in APC-/- colon carcinoma (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-21
    Description: The adenomatous polyposis coli (APC) tumor suppressor protein binds to beta-catenin, a protein recently shown to interact with Tcf and Lef transcription factors. The gene encoding hTcf-4, a Tcf family member that is expressed in colonic epithelium, was cloned and characterized. hTcf-4 transactivates transcription only when associated with beta-catenin. Nuclei of APC-/- colon carcinoma cells were found to contain a stable beta-catenin-hTcf-4 complex that was constitutively active, as measured by transcription of a Tcf reporter gene. Reintroduction of APC removed beta-catenin from hTcf-4 and abrogated the transcriptional transactivation. Constitutive transcription of Tcf target genes, caused by loss of APC function, may be a crucial event in the early transformation of colonic epithelium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korinek, V -- Barker, N -- Morin, P J -- van Wichen, D -- de Weger, R -- Kinzler, K W -- Vogelstein, B -- Clevers, H -- CA57345/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 21;275(5307):1784-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, University Hospital, 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/9065401" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli Protein ; Amino Acid Sequence ; Animals ; Cell Line ; Cell Transformation, Neoplastic ; Cloning, Molecular ; Colon/metabolism ; Colonic Neoplasms/*genetics/metabolism ; Cytoskeletal Proteins/genetics/*metabolism ; Gene Expression Regulation, Neoplastic ; *Genes, APC ; Genes, Reporter ; Humans ; Intestinal Mucosa/metabolism ; Mice ; Molecular Sequence Data ; Signal Transduction ; TCF Transcription Factors ; *Trans-Activators ; Transcription Factor 7-Like 2 Protein ; Transcription Factors/chemistry/genetics/*metabolism ; *Transcriptional Activation ; Transfection ; Tumor Cells, Cultured ; beta Catenin
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    V(D)J recombination in mature B cells: a mechanism for altering antibody responses (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-10
    Description: The clonal selection theory states that B lymphocytes producing high-affinity immunoglobulins are selected from a pool of cells undergoing antibody gene mutation. Somatic hypermutation is a well-documented mechanism for achieving diversification of immune responses in mature B cells. Antibody genes were also found to be modified in such cells in germinal centers by recombination of the variable (V), diversity (D), and joining (J) segments. The ability to alter immunoglobulin expression by V(D)J recombination in the selective environment of the germinal center may be an additional mechanism for inactivation or diversification of immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Papavasiliou, F -- Casellas, R -- Suh, H -- Qin, X F -- Besmer, E -- Pelanda, R -- Nemazee, D -- Rajewsky, K -- Nussenzweig, M C -- AI33890/AI/NIAID NIH HHS/ -- R01 AI033608/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 10;278(5336):298-301.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Immunology, Rockefeller University, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9323210" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibody Diversity ; B-Lymphocytes/*immunology ; Cells, Cultured ; DNA Nucleotidyltransferases/genetics/metabolism ; DNA-Binding Proteins/genetics ; Gene Expression ; *Gene Rearrangement, B-Lymphocyte ; Genes, Immunoglobulin ; Genes, RAG-1 ; Germinal Center/cytology/immunology ; Immunoglobulin Joining Region/*genetics ; Immunoglobulin M/biosynthesis/genetics ; Immunoglobulin Variable Region/*genetics ; Lymphocyte Activation ; Mice ; *Recombination, Genetic ; VDJ Recombinases
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    Pericyte loss and microaneurysm formation in PDGF-B-deficient mice (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-11
    Description: Platelet-derived growth factor (PDGF)-B-deficient mouse embryos were found to lack microvascular pericytes, which normally form part of the capillary wall, and they developed numerous capillary microaneurysms that ruptured at late gestation. Endothelial cells of the sprouting capillaries in the mutant mice appeared to be unable to attract PDGF-Rbeta-positive pericyte progenitor cells. Pericytes may contribute to the mechanical stability of the capillary wall. Comparisons made between PDGF null mouse phenotypes suggest a general role for PDGFs in the development of myofibroblasts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lindahl, P -- Johansson, B R -- Leveen, P -- Betsholtz, C -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):242-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Biochemistry, University of Goteborg, Medicinaregatan 9A, S-413 90 Goteborg, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9211853" target="_blank"〉PubMed〈/a〉
    Keywords: Aneurysm/*etiology ; Animals ; Brain/blood supply ; Capillaries/*cytology/embryology/metabolism ; Cell Movement ; Endothelium, Vascular/cytology/metabolism ; Hemorrhage/etiology ; Mice ; Mice, Inbred C57BL ; Mutation ; Neovascularization, Physiologic ; Platelet-Derived Growth Factor/deficiency/genetics/*physiology ; Proto-Oncogene Proteins/deficiency/genetics/*physiology ; Proto-Oncogene Proteins c-sis ; Receptor Protein-Tyrosine Kinases/metabolism ; Receptor, Platelet-Derived Growth Factor beta ; Receptor, TIE-2 ; Receptors, Platelet-Derived Growth Factor/metabolism ; Signal Transduction ; Stem Cells/cytology/metabolism ; Up-Regulation
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    Epilepsy and exacerbation of brain injury in mice lacking the glutamate transporter GLT-1 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-13
    Description: Extracellular levels of the excitatory neurotransmitter glutamate in the nervous system are maintained by transporters that actively remove glutamate from the extracellular space. Homozygous mice deficient in GLT-1, a widely distributed astrocytic glutamate transporter, show lethal spontaneous seizures and increased susceptibility to acute cortical injury. These effects can be attributed to elevated levels of residual glutamate in the brains of these mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanaka, K -- Watase, K -- Manabe, T -- Yamada, K -- Watanabe, M -- Takahashi, K -- Iwama, H -- Nishikawa, T -- Ichihara, N -- Kikuchi, T -- Okuyama, S -- Kawashima, N -- Hori, S -- Takimoto, M -- Wada, K -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1699-702.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Degenerative Neurological Diseases, National Institute of Neuroscience, Kodaira, Tokyo 187, Japan. tanaka@ncnaxp.ncap.go.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180080" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Binding Cassette Transporters/genetics/*metabolism ; Amino Acid Transport System X-AG ; Animals ; Biological Transport ; Brain/*metabolism/pathology ; Brain Injuries/*metabolism/pathology ; Electroencephalography ; Epilepsy/*metabolism/pathology ; Gene Targeting ; Glutamic Acid/*metabolism ; Hippocampus/metabolism/pathology ; Mice ; Mice, Inbred C57BL ; Nerve Degeneration ; Pyramidal Cells/pathology/physiology ; Synapses/metabolism ; Synaptic Transmission
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    Immunotherapy of tumors with autologous tumor-derived heat shock protein preparations (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-06
    Description: Immunotherapy of mice with preexisting cancers with heat shock protein preparations derived from autologous cancer resulted in retarded progression of the primary cancer, a reduced metastatic load, and prolongation of life-span. Treatment with heat shock protein preparations derived from cancers other than the autologous cancer did not provide significant protection. Spontaneous cancers (lung cancer and melanoma), chemically induced cancers (fibrosarcoma and colon carcinoma), and an ultraviolet radiation-induced spindle cell carcinoma were tested, and the results support the efficacy of autologous cancer-derived heat shock protein-peptide complexes in immunotherapy of cancers without the need to identify specific tumor antigenic epitopes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tamura, Y -- Peng, P -- Liu, K -- Daou, M -- Srivastava, P K -- CA44786/CA/NCI NIH HHS/ -- CA64394/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):117-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Immunotherapy of Cancer and Infectious Diseases, MC1601, University of Connecticut School of Medicine, Farmington, CT 06030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9311915" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*immunology/therapeutic use ; Autoimmunity ; CD4-Positive T-Lymphocytes/immunology ; CD8-Positive T-Lymphocytes/immunology ; HSP70 Heat-Shock Proteins/immunology ; Heat-Shock Proteins/*immunology/therapeutic use ; Immunization ; *Immunotherapy ; Killer Cells, Natural/immunology ; Lung Neoplasms/immunology/pathology/secondary/therapy ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Neoplasm Metastasis ; Neoplasms/immunology/pathology/*therapy ; Neoplasms, Experimental/immunology/pathology/*therapy
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    Immune response and myoblasts that express Fas ligand (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kang, S M -- Hoffmann, A -- Le, D -- Springer, M L -- Stock, P G -- Blau, H M -- F32 HL08991/HL/NHLBI NIH HHS/ -- R01-CA59717/CA/NCI NIH HHS/ -- R01-HD18179/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1322-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9411754" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD95/biosynthesis ; Apoptosis ; Cell Differentiation ; Cell Transplantation ; Fas Ligand Protein ; *Graft Rejection ; Immune Tolerance ; Islets of Langerhans/cytology ; *Islets of Langerhans Transplantation ; Membrane Glycoproteins/genetics/*physiology ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Muscle Fibers, Skeletal/*cytology/metabolism ; Muscle, Skeletal/*cytology/metabolism ; Neutrophils/*immunology ; Transfection
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  • 47
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    Conversion by Peyer's patch lymphocytes of human enterocytes into M cells that transport bacteria (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-15
    Description: The epithelium that lines the gut is impermeable to macromolecules and microorganisms, except in Peyer's patches (PPs), where the lymphoid follicle-associated epithelium (FAE) contains M cells that transport antigens and microorganisms. A cultured system that reproduces the main characteristics of FAE and M cells was established by cultivation of PP lymphocytes with the differentiated human intestinal cell line Caco-2. Lymphocytes settled into the epithelial monolayer, inducing reorganization of the brush border and a temperature-dependent transport of particles and Vibrio cholerae. This model system could prove useful for intestinal physiology, vaccine research, and drug delivery studies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kerneis, S -- Bogdanova, A -- Kraehenbuhl, J P -- Pringault, E -- New York, N.Y. -- Science. 1997 Aug 15;277(5328):949-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Swiss Institute for Experimental Cancer Research, and Institute of Biochemistry, University of Lausanne, CH-1066 Epalinges-Lausanne, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9252325" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/immunology ; *Bacterial Translocation ; Caco-2 Cells ; Carrier Proteins/analysis ; Cell Polarity ; Coculture Techniques ; Fluorescein-5-isothiocyanate ; Humans ; *Immunity, Mucosal ; Intestinal Mucosa/*cytology/*immunology/microbiology ; Lymphocytes/*immunology ; Mice ; Mice, Inbred BALB C ; Microfilament Proteins/analysis ; Microspheres ; Microvilli/chemistry/ultrastructure ; Peyer's Patches/cytology/*immunology ; Sucrase-Isomaltase Complex/analysis ; T-Lymphocytes/immunology ; Temperature ; Vibrio cholerae/*metabolism
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    Requirement for the transcription factor LSIRF/IRF4 for mature B and T lymphocyte function (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-01-24
    Description: Lymphocyte-specific interferon regulatory factor (LSIRF) (now called IRF4) is a transcription factor expressed only in lymphocytes. Mice deficient in IRF4 showed normal distribution of B and T lymphocyes at 4 to 5 weeks of age but developed progressive generalized lymphadenopathy. IRF4-deficient mice exhibited a profound reduction in serum immunoglobulin concentrations and did not mount detectable antibody responses. T lymphocyte function was also impaired in vivo; these mice could not generate cytotoxic or antitumor responses. Thus, IRF4 is essential for the function and homeostasis of both mature B and mature T lymphocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mittrucker, H W -- Matsuyama, T -- Grossman, A -- Kundig, T M -- Potter, J -- Shahinian, A -- Wakeham, A -- Patterson, B -- Ohashi, P S -- Mak, T W -- New York, N.Y. -- Science. 1997 Jan 24;275(5299):540-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, University of Toronto, Toronto, Ontario, M5G 2C1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8999800" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; B-Lymphocytes/*immunology ; Bone Marrow Cells ; Cytotoxicity, Immunologic ; DNA-Binding Proteins/genetics/*physiology ; Female ; Gene Targeting ; Graft vs Host Reaction ; Immunization ; Immunoglobulins/blood ; Interferon Regulatory Factors ; Lymphatic Diseases/etiology ; Lymphocyte Activation ; Lymphocyte Subsets/cytology ; Lymphoid Tissue/cytology ; Male ; Mast-Cell Sarcoma/immunology ; Mice ; Mice, Inbred C57BL ; Mice, SCID ; Neoplasm Transplantation ; T-Lymphocytes/*immunology ; T-Lymphocytes, Cytotoxic/immunology ; Transcription Factors/genetics/*physiology
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    Signaling by phosphoinositide-3,4,5-trisphosphate through proteins containing pleckstrin and Sec7 homology domains (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-28
    Description: Signal transmission by many cell surface receptors results in the activation of phosphoinositide (PI) 3-kinases that phosphorylate the 3' position of polyphosphoinositides. From a screen for mouse proteins that bind phosphoinositides, the protein GRP1was identified. GRP1 binds phosphatidylinositol-3,4,5-trisphosphate [PtdIns(3,4, 5)P3] through a pleckstrin homology (PH) domain and displays a region of high sequence similarity to the yeast Sec7 protein. The PH domain of the closely related protein cytohesin-1, which, through its Sec7 homology domain, regulates integrin beta2 and catalyzes guanine nucleotide exchange of the small guanine nucleotide-binding protein ARF1, was also found to specifically bind PtdIns(3,4,5)P3. GRP1 and cytohesin-1 appear to connect receptor-activated PI 3-kinase signaling pathways with proteins that mediate biological responses such as cell adhesion and membrane trafficking.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klarlund, J K -- Guilherme, A -- Holik, J J -- Virbasius, J V -- Chawla, A -- Czech, M P -- DK30648/DK/NIDDK NIH HHS/ -- DK30898/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 28;275(5308):1927-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Molecular Medicine and Department of Biochemistry and Molecular Biology, University of Massachusetts Medical Center, 373 Plantation Street, Worcester, MA 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9072969" target="_blank"〉PubMed〈/a〉
    Keywords: ADP-Ribosylation Factor 1 ; ADP-Ribosylation Factors ; Adipocytes/chemistry ; Amino Acid Sequence ; Animals ; Antigens, CD18/metabolism ; Blood Proteins/*chemistry ; Brain Chemistry ; Cell Adhesion Molecules/chemistry/*metabolism ; Cell Membrane/metabolism ; Cells, Cultured ; Cloning, Molecular ; DNA, Complementary ; Fungal Proteins/*chemistry ; GTP-Binding Proteins/metabolism ; *Guanine Nucleotide Exchange Factors ; Humans ; Mice ; Molecular Sequence Data ; Phosphatidylinositol 3-Kinases ; Phosphatidylinositol Phosphates/*metabolism ; *Phosphoproteins ; Phosphorylation ; Phosphotransferases (Alcohol Group Acceptor)/*metabolism ; Receptors, Cytoplasmic and Nuclear/metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Sequence Homology, Amino Acid ; *Signal Transduction
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    Fyn-kinase as a determinant of ethanol sensitivity: relation to NMDA-receptor function (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-24
    Description: Animals vary in their sensitivity to ethanol, a trait at least partly determined by genetic factors. In order to identify possible responsible genes, mice lacking Fyn, a non-receptor type tyrosine kinase, were investigated. These mice were hypersensitive to the hypnotic effect of ethanol. The administration of ethanol enhanced tyrosine phosphorylation of the N-methyl-D-aspartate receptor (NMDAR) in the hippocampus of control mice but not in Fyn-deficient mice. An acute tolerance to ethanol inhibition of NMDAR-mediated excitatory postsynaptic potentials in hippocampal slices developed in control mice but not in Fyn-deficient mice. These results indicate that Fyn affects behavioral, biochemical, and physiological responses to ethanol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miyakawa, T -- Yagi, T -- Kitazawa, H -- Yasuda, M -- Kawai, N -- Tsuboi, K -- Niki, H -- New York, N.Y. -- Science. 1997 Oct 24;278(5338):698-701.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Neurobiology of Emotion, Brain Science Institute, RIKEN, Hirosawa, Wako-shi, Saitama-ken 351-01, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9381182" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Central Nervous System Depressants/*pharmacology ; Ethanol/*pharmacology ; Excitatory Postsynaptic Potentials/drug effects ; Flurazepam/pharmacology ; Hippocampus/metabolism ; Hypnotics and Sedatives/pharmacology ; In Vitro Techniques ; Male ; Mice ; Mice, Knockout ; Motor Activity/*drug effects ; N-Methylaspartate/pharmacology ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein-Tyrosine Kinases/deficiency/genetics/*metabolism ; Proto-Oncogene Proteins/deficiency/genetics/*metabolism ; Proto-Oncogene Proteins c-fyn ; Receptors, N-Methyl-D-Aspartate/*metabolism
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    Multistep control of pituitary organogenesis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: Lhx3 and Lhx4 (Gsh4), two closely related LIM homeobox genes, determine formation of the pituitary gland in mice. Rathke's pouch is formed in two steps-first as a rudiment and later as a definitive pouch. Lhx3 and Lhx4 have redundant control over formation of the definitive pouch. Lhx3 controls a subsequent step of pituitary fate commitment. Thereafter, Lhx3 and Lhx4 together regulate proliferation and differentiation of pituitary-specific cell lineages. Thus, Lhx3 and Lhx4 dictate pituitary organ identity by controlling developmental decisions at multiple stages of organogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sheng, H Z -- Moriyama, K -- Yamashita, T -- Li, H -- Potter, S S -- Mahon, K A -- Westphal, H -- New York, N.Y. -- Science. 1997 Dec 5;278(5344):1809-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9388186" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Division ; Cell Lineage ; Embryonic and Fetal Development/genetics ; Gene Expression Regulation, Developmental ; *Genes, Homeobox ; Homeodomain Proteins/*genetics/physiology ; LIM-Homeodomain Proteins ; Mice ; Mutation ; Pituitary Gland/chemistry/cytology/*embryology ; Pituitary Hormones/analysis/genetics ; Stem Cells/cytology ; *Transcription Factors
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    Mediation of neuronal apoptosis by enhancement of outward potassium current (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-10-06
    Description: Apoptosis of mouse neocortical neurons induced by serum deprivation or by staurosporine was associated with an early enhancement of delayed rectifier (IK) current and loss of total intracellular K+. This IK augmentation was not seen in neurons undergoing excitotoxic necrosis or in older neurons resistant to staurosporine-induced apoptosis. Attenuating outward K+ current with tetraethylammonium or elevated extracellular K+, but not blockers of Ca2+, Cl-, or other K+ channels, reduced apoptosis, even if associated increases in intracellular Ca2+ concentration were prevented. Furthermore, exposure to the K+ ionophore valinomycin or the K+-channel opener cromakalim induced apoptosis. Enhanced K+ efflux may mediate certain forms of neuronal apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, S P -- Yeh, C H -- Sensi, S L -- Gwag, B J -- Canzoniero, L M -- Farhangrazi, Z S -- Ying, H S -- Tian, M -- Dugan, L L -- Choi, D W -- 30337/PHS HHS/ -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):114-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for the Study of Nervous System Injury and Department of Neurology, 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/9311914" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Chloromethyl Ketones/pharmacology ; Animals ; *Apoptosis/drug effects ; Benzopyrans/pharmacology ; Calcium/metabolism ; Cerebral Cortex/cytology ; Cromakalim ; Cycloheximide/pharmacology ; Cysteine Proteinase Inhibitors/pharmacology ; Gadolinium/pharmacology ; Mice ; N-Methylaspartate/pharmacology ; Neurons/*cytology/metabolism ; Neuroprotective Agents/pharmacology ; Nifedipine/pharmacology ; Patch-Clamp Techniques ; Potassium/*metabolism ; Potassium Channels/drug effects/*metabolism ; Pyrroles/pharmacology ; Staurosporine/pharmacology ; Tetraethylammonium ; Tetraethylammonium Compounds/pharmacology ; Veratridine/pharmacology
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    Direct regulation of the Akt proto-oncogene product by phosphatidylinositol-3,4-bisphosphate (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-31
    Description: The regulation of the serine-threonine kinase Akt by lipid products of phosphoinositide 3-kinase (PI 3-kinase) was investigated. Akt activity was found to correlate with the amount of phosphatidylinositol-3,4-bisphosphate (PtdIns-3,4-P2) in vivo, and synthetic PtdIns-3,4-P2 activated Akt both in vitro and in vivo. Binding of PtdIns-3,4-P2 occurred within the Akt pleckstrin homology (PH) domain and facilitated dimerization of Akt. Akt mutated in the PH domain was not activated by PI 3-kinase in vivo or by PtdIns-3, 4-P2 in vitro, and it was impaired in binding to PtdIns-3,4-P2. Examination of the binding to other phosphoinositides revealed that they bound to the Akt PH domain with much lower affinity than did PtdIns-3,4-P2 and failed to increase Akt activity. Thus, Akt is apparently regulated by the direct interaction of PtdIns-3,4-P2 with the Akt PH domain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Franke, T F -- Kaplan, D R -- Cantley, L C -- Toker, A -- GM41890/GM/NIGMS NIH HHS/ -- N01-CO-74101/CO/NCI NIH HHS/ -- R01 GM041890/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jan 31;275(5300):665-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉ABL-Basic Research Program, National Cancer Institute-Frederick Cancer Research Facility and Development Center (NCI-FCRFDC), Frederick, MD 21702, USA. tfranke@bidmc.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005852" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; COS Cells ; Dimerization ; Enzyme Activation ; Mice ; Phosphatidylinositol 3-Kinases ; Phosphatidylinositol Phosphates/*metabolism/pharmacology ; Phosphorylation ; Phosphotransferases (Alcohol Group Acceptor)/metabolism ; Platelet-Derived Growth Factor/pharmacology ; Point Mutation ; Protein-Serine-Threonine Kinases/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-akt ; Recombinant Fusion Proteins/chemistry/metabolism
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    Lymphocyte survival: a red queen hypothesis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freitas, A A -- Rocha, B -- New York, N.Y. -- Science. 1997 Sep 26;277(5334):1950.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire des Dynamiques Lymphocytaires, Institut Pasteur CNRS URA 1961, 75015 Paris, France. afreitas@pasteur.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9333949" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; CD8-Positive T-Lymphocytes/cytology/immunology ; Cell Survival ; Histocompatibility Antigens Class I/physiology ; Histocompatibility Antigens Class II/physiology ; Immunologic Memory ; Kruppel-Like Transcription Factors ; Lymphocyte Activation ; Mice ; T-Lymphocytes/*cytology/*immunology/metabolism ; Trans-Activators/*physiology ; Zinc Fingers
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    Maintenance of acetylcholine receptor number by neuregulins at the neuromuscular junction in vivo (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-04-25
    Description: ARIA (for acetylcholine receptor-inducing activity), a protein purified on the basis of its ability to stimulate acetylcholine receptor (AChR) synthesis in cultured myotubes, is a member of the neuregulin family and is present at motor endplates. This suggests an important role for neuregulins in mediating the nerve-dependent accumulation of AChRs in the postsynaptic membrane. Nerve-muscle synapses have now been analyzed in neuregulin-deficient animals. Mice that are heterozygous for the deletion of neuregulin isoforms containing an immunoglobulin-like domain are myasthenic. Postsynaptic AChR density is significantly reduced, as judged by the decrease in the mean amplitude of spontaneous miniature endplate potentials and bungarotoxin binding. On the other hand, the mean amplitude of evoked endplate potentials was not decreased, due to an increase in the number of quanta released per impulse, a compensation that has been observed in other myasthenic states. Thus, the density of AChRs in the postsynaptic membrane depends on immunoglobulin-containing neuregulin isoforms throughout the life of the animal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sandrock, A W Jr -- Dryer, S E -- Rosen, K M -- Gozani, S N -- Kramer, R -- Theill, L E -- Fischbach, G D -- K08-NS01580/NS/NINDS NIH HHS/ -- R01-NS18458/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):599-603.〈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/9110980" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism ; Animals ; Bungarotoxins/metabolism ; Glycoproteins/genetics/*physiology ; Heterozygote ; Immunoglobulins/analysis ; In Vitro Techniques ; Membrane Potentials ; Mice ; Motor Endplate/metabolism/physiology ; Muscle Weakness/etiology ; Nerve Tissue Proteins/genetics/*physiology ; Neuregulin-1 ; Neuregulins ; Neuromuscular Junction/*metabolism ; Receptors, Cholinergic/genetics/*metabolism ; Synaptic Transmission
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    Tagging T cells: TH1 or TH2? (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallagher, R -- New York, N.Y. -- Science. 1997 Mar 14;275(5306):1615.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9072827" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Humans ; Immunophenotyping ; Interferons/pharmacology ; Interleukin-12/pharmacology ; Mice ; Receptors, Interleukin/*analysis/biosynthesis ; Receptors, Interleukin-12 ; Th2 Cells/*immunology
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    Population biology of lymphocytes (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallagher, R B -- New York, N.Y. -- Science. 1997 Jun 20;276(5320):1817.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9206842" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*cytology/immunology/physiology ; Gene Rearrangement ; Genes, Immunoglobulin ; Homeostasis ; Lymphocyte Count ; Mice ; Mice, Transgenic ; Receptors, Antigen, B-Cell/analysis
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    Independent and additive effects of central POMC and leptin pathways on murine obesity (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: The lethal yellow (AY/a) mouse has a defect in proopiomelanocortin (POMC) signaling in the brain that leads to obesity, and is resistant to the anorexigenic effects of the hormone leptin. It has been proposed that the weight-reducing effects of leptin are thus transmitted primarily by way of POMC neurons. However, the central effects of defective POMC signaling, and the absence of leptin, on weight gain in double-mutant lethal yellow (AY/a) leptin-deficient (lepob/lepob) mice were shown to be independent and additive. Furthermore, deletion of the leptin gene restored leptin sensitivity to AY/a mice. This result implies that in the AY/a mouse, obesity is independent of leptin action, and resistance to leptin results from desensitization of leptin signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boston, B A -- Blaydon, K M -- Varnerin, J -- Cone, R D -- DK/AR517330/DK/NIDDK NIH HHS/ -- DK02404/DK/NIDDK NIH HHS/ -- HD33703/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1997 Nov 28;278(5343):1641-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Oregon Health Sciences University, Portland, OR 97201, USA. Laboratories, Rahway, NJ 07065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9374468" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenalectomy ; Agouti Signaling Protein ; Alleles ; Animals ; Arcuate Nucleus of Hypothalamus/*metabolism ; Blood Glucose/analysis ; Corticosterone/blood ; Crosses, Genetic ; Eating/drug effects ; Energy Metabolism ; Female ; Homeostasis ; Insulin/blood ; *Intercellular Signaling Peptides and Proteins ; Leptin ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Neurons/metabolism ; Obesity/genetics/*metabolism ; Pro-Opiomelanocortin/*metabolism ; Proteins/genetics/*metabolism/pharmacology ; Signal Transduction ; Weight Gain
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    Murine model of Niemann-Pick C disease: mutation in a cholesterol homeostasis gene (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-07-11
    Description: An integrated human-mouse positional candidate approach was used to identify the gene responsible for the phenotypes observed in a mouse model of Niemann-Pick type C (NP-C) disease. The predicted murine NPC1 protein has sequence homology to the putative transmembrane domains of the Hedgehog signaling molecule Patched, to the cholesterol-sensing regions of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase and SREBP cleavage-activating protein (SCAP), and to the NPC1 orthologs identified in human, the nematode Caenorhabditis elegans, and the yeast Saccharomyces cerevisiae. The mouse model may provide an important resource for studying the role of NPC1 in cholesterol homeostasis and neurodegeneration and for assessing the efficacy of new drugs for NP-C disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loftus, S K -- Morris, J A -- Carstea, E D -- Gu, J Z -- Cummings, C -- Brown, A -- Ellison, J -- Ohno, K -- Rosenfeld, M A -- Tagle, D A -- Pentchev, P G -- Pavan, W J -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):232-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetic Disease Research, National Human Genome Research Institute, National Institutes of Health (NIH), Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9211850" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cholesterol/*metabolism ; *Disease Models, Animal ; Homeostasis ; Humans ; Hydroxymethylglutaryl CoA Reductases/chemistry ; Intracellular Signaling Peptides and Proteins ; Lysosomes/metabolism ; Membrane Proteins/chemistry ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Molecular Sequence Data ; Mutation ; Niemann-Pick Diseases/*genetics/metabolism ; Phenotype ; Protein Sorting Signals/chemistry ; Proteins/chemistry/*genetics/physiology ; Sequence Homology, Amino Acid
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    V(D)J recombinase activity in a subset of germinal center B lymphocytes (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-10
    Description: Reexpression of the V(D)J recombinase-activating genes RAG1 and RAG2 in germinal center B cells creates the potential for immunoglobulin gene rearrangement and the generation of new antigen receptor specificities. Intermediate products of V(D)J recombination are abundant in a subset of germinal center B cells, demonstrating that the kappa immunoglobulin light-chain locus becomes a substrate for renewed V(D)J recombinase activity. This recombinationally active cell compartment contains many heavy-chain VDJ rearrangements that encode low-affinity or nonfunctional antibody. In germinal centers, secondary V(D)J recombination may be induced by diminished binding to antigen ligands, thereby limiting abrupt changes in receptor specificity to B cells that are usually eliminated from the germinal center reaction. This restriction preserves efficient antigen-driven selection in germinal centers while allowing for saltations in the somatic evolution of B cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, S -- Dillon, S R -- Zheng, B -- Shimoda, M -- Schlissel, M S -- Kelsoe, G -- AI24335/AI/NIAID NIH HHS/ -- AI40227/AI/NIAID NIH HHS/ -- HL48722/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Oct 10;278(5336):301-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology and Program in Molecular and Cell Biology, University of Maryland School of Medicine, 655 West Baltimore Street, Baltimore, MD 21201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9323211" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Diversity ; B-Lymphocytes/*enzymology/immunology ; DNA Nucleotidyltransferases/*metabolism ; DNA-Binding Proteins/genetics ; *Gene Rearrangement, B-Lymphocyte ; *Genes, Immunoglobulin ; Genes, RAG-1 ; Germinal Center/cytology/*immunology ; Immunization ; Immunoglobulin Joining Region/genetics ; Immunoglobulin Variable Region/genetics ; Immunoglobulin kappa-Chains/genetics ; Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; *Recombination, Genetic ; VDJ Recombinases
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    Signaling vascular morphogenesis and maintenance (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hanahan, D -- New York, N.Y. -- Science. 1997 Jul 4;277(5322):48-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of California at San Francisco, San Francisco, CA 94143-0534, USA. dougvhanahan@biochem.ucsf.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9229772" target="_blank"〉PubMed〈/a〉
    Keywords: Angiopoietin-1 ; Angiopoietin-2 ; Animals ; Apoptosis ; Blood Vessels/*embryology/growth & development/metabolism ; Cell Division ; Endothelial Growth Factors/metabolism ; Endothelium, Vascular/*cytology/metabolism ; Lymphokines/metabolism ; Membrane Glycoproteins/metabolism ; Mice ; Mice, Knockout ; Morphogenesis ; *Neovascularization, Physiologic ; Phosphorylation ; Proteins/metabolism ; Proto-Oncogene Proteins/metabolism ; Receptor Protein-Tyrosine Kinases/*metabolism ; Receptor, TIE-2 ; Receptors, Growth Factor/metabolism ; Receptors, Vascular Endothelial Growth Factor ; *Signal Transduction ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factor Receptor-1 ; Vascular Endothelial Growth Factors
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    PTG, a protein phosphatase 1-binding protein with a role in glycogen metabolism (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-07
    Description: Protein dephosphorylation by phosphatase PP1 plays a central role in mediating the effects of insulin on glucose and lipid metabolism. A PP1C-targeting protein expressed in 3T3-L1 adipocytes (called PTG, for protein targeting to glycogen) was cloned and characterized. PTG was expressed predominantly in insulin-sensitive tissues. In addition to binding and localizing PP1C to glycogen, PTG formed complexes with phosphorylase kinase, phosphorylase a, and glycogen synthase, the primary enzymes involved in the hormonal regulation of glycogen metabolism. Overexpression of PTG markedly increased basal and insulin-stimulated glycogen synthesis in Chinese hamster ovary cells overexpressing the insulin receptor, which do not express endogenous PTG. These results suggest that PTG is critical for glycogen metabolism, possibly functioning as a molecular scaffold.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Printen, J A -- Brady, M J -- Saltiel, A R -- New York, N.Y. -- Science. 1997 Mar 7;275(5305):1475-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9045612" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Amino Acid Sequence ; Animals ; CHO Cells ; Carrier Proteins/chemistry/genetics/*metabolism ; Cloning, Molecular ; Cricetinae ; DNA, Complementary/genetics ; Glycogen/biosynthesis/*metabolism ; Glycogen Synthase/metabolism ; Insulin/pharmacology ; *Intracellular Signaling Peptides and Proteins ; Mice ; Molecular Sequence Data ; Phosphoprotein Phosphatases/*metabolism ; Phosphorylase Kinase/metabolism ; Phosphorylase a/metabolism ; Phosphorylation ; Protein Binding ; Protein Phosphatase 1 ; Recombinant Fusion Proteins/metabolism ; Substrate Specificity ; Transfection
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    A mammalian telomerase-associated protein (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-02-14
    Description: The telomerase ribonucleoprotein catalyzes the addition of new telomeres onto chromosome ends. A gene encoding a mammalian telomerase homolog called TP1 (telomerase-associated protein 1) was identified and cloned. TP1 exhibited extensive amino acid similarity to the Tetrahymena telomerase protein p80 and was shown to interact specifically with mammalian telomerase RNA. Antiserum to TP1 immunoprecipitated telomerase activity from cell extracts, suggesting that TP1 is associated with telomerase in vivo. The identification of TP1 suggests that telomerase-associated proteins are conserved from ciliates to humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrington, L -- McPhail, T -- Mar, V -- Zhou, W -- Oulton, R -- Bass, M B -- Arruda, I -- Robinson, M O -- New York, N.Y. -- Science. 1997 Feb 14;275(5302):973-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Arruda, Ontario Cancer Institute-Amgen Institute, Department of Medical Biophysics, University of Toronto, 620 University Avenue, Toronto, Ontario M5G 2C1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9020079" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Blotting, Northern ; Carrier Proteins/*chemistry/genetics/immunology/*metabolism ; Cell Line ; Cloning, Molecular ; DNA, Complementary/genetics ; Humans ; Mice ; Molecular Sequence Data ; Precipitin Tests ; RNA/*metabolism ; RNA, Messenger/genetics/metabolism ; Sequence Homology, Amino Acid ; Telomerase/*chemistry/genetics/metabolism ; Tetrahymena/chemistry/genetics ; Transfection ; Tumor Cells, Cultured
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    Regulation of protein phosphatase 2A by direct interaction with casein kinase 2alpha (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-05-09
    Description: Timely deactivation of kinase cascades is crucial to the normal control of cell signaling and is partly accomplished by protein phosphatase 2A (PP2A). The catalytic (alpha) subunit of the serine-threonine kinase casein kinase 2 (CK2) bound to PP2A in vitro and in mitogen-starved cells; binding required the integrity of a sequence motif common to CK2alpha and SV40 small t antigen. Overexpression of CK2alpha resulted in deactivation of mitogen-activated protein kinase kinase (MEK) and suppression of cell growth. Moreover, CK2alpha inhibited the transforming activity of oncogenic Ras, but not that of constitutively activated MEK. Thus, CK2alpha may regulate the deactivation of the mitogen-activated protein kinase pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heriche, J K -- Lebrin, F -- Rabilloud, T -- Leroy, D -- Chambaz, E M -- Goldberg, Y -- New York, N.Y. -- Science. 1997 May 9;276(5314):952-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Commissariat a l'Energie Atomique, Departement de Biologie Moleculaire et Structurale, Laboratoire de Biochimie des Regulations Cellulaires Endocrines, Unite 244, F-38054 Grenoble Cedex 9, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9139659" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Amino Acid Sequence ; Animals ; Antigens, Polyomavirus Transforming ; Binding Sites ; Casein Kinase II ; Cell Division ; Cell Transformation, Neoplastic ; MAP Kinase Kinase 1 ; Mice ; *Mitogen-Activated Protein Kinase Kinases ; Mutation ; Okadaic Acid/pharmacology ; Phosphoprotein Phosphatases/*metabolism ; Phosphorylation ; Platelet-Derived Growth Factor/pharmacology ; Protein Phosphatase 2 ; Protein-Serine-Threonine Kinases/*metabolism/pharmacology ; Protein-Tyrosine Kinases/metabolism/pharmacology ; Recombinant Fusion Proteins/metabolism ; Transfection ; ras Proteins/pharmacology
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    Possible function found for breast cancer genes (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-04-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, G -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):531-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9148411" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; BRCA1 Protein/genetics/*metabolism ; BRCA2 Protein ; Breast Neoplasms/*genetics/metabolism ; Cell Division ; *DNA Repair ; DNA-Binding Proteins/genetics/metabolism ; Female ; Gene Expression Regulation ; *Genes, BRCA1 ; Humans ; Mice ; Mice, Knockout ; Mutation ; Neoplasm Proteins/*genetics/*metabolism ; Ovarian Neoplasms/genetics ; Rad51 Recombinase ; Transcription Factors/*genetics/*metabolism
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    On raising energy expenditure in ob/ob mice (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-05-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Himms-Hagen, J -- New York, N.Y. -- Science. 1997 May 16;276(5315):1132-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9173544" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue ; Animals ; Body Composition ; Body Weight ; *Eating ; Energy Intake ; *Energy Metabolism ; Leptin ; Mice ; Mice, Obese ; Neuropeptide Y/genetics/physiology ; Obesity/*metabolism ; *Oxygen Consumption ; Proteins/pharmacology
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    The mouse that prompted a roar (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1997 Jul 4;277(5322):24-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9229765" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteriophage P1/genetics ; DNA, Complementary ; Gene Expression ; *Gene Targeting ; Genetic Engineering/*methods ; Integrases/genetics ; Mice ; *Mice, Transgenic ; National Institutes of Health (U.S.) ; *Patents as Topic ; Polymerase Chain Reaction ; United States ; *Viral Proteins
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Worm longevity gene cloned (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roush, W -- New York, N.Y. -- Science. 1997 Aug 15;277(5328):897-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9281069" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics/growth & development/metabolism ; Caenorhabditis elegans Proteins ; Cloning, Molecular ; Energy Intake ; *Genes, Helminth ; Glucose/metabolism ; Humans ; Insulin/metabolism ; Longevity/*genetics ; Mice ; Mutation ; Phosphatidylinositol 3-Kinases ; Phosphotransferases (Alcohol Group Acceptor)/genetics/metabolism ; Receptor, Insulin/*genetics/metabolism ; Second Messenger Systems ; Signal Transduction
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Interleukin-3-induced phosphorylation of BAD through the protein kinase Akt (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-24
    Description: BAD is a distant member of the Bcl-2 family that promotes cell death. Phosphorylation of BAD prevents this. BAD phosphorylation induced by interleukin-3 (IL-3) was inhibited by specific inhibitors of phosphoinositide 3-kinase (PI 3-kinase). Akt, a survival-promoting serine-threonine protein kinase, was activated by IL-3 in a PI 3-kinase-dependent manner. Active, but not inactive, forms of Akt were found to phosphorylate BAD in vivo and in vitro at the same residues that are phosphorylated in response to IL-3. Thus, the proapoptotic function of BAD is regulated by the PI 3-kinase-Akt pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉del Peso, L -- Gonzalez-Garcia, M -- Page, C -- Herrera, R -- Nunez, G -- CA-64556/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 24;278(5338):687-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9381178" target="_blank"〉PubMed〈/a〉
    Keywords: Androstadienes/pharmacology ; Animals ; Apoptosis ; Carrier Proteins/*metabolism ; Cell Line ; Chromones/pharmacology ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Humans ; Interleukin-3/*pharmacology ; Mice ; Morpholines/pharmacology ; Phosphatidylinositol 3-Kinases/antagonists & inhibitors/*metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Protein-Serine-Threonine Kinases/*metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-akt ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Recombinant Proteins/metabolism ; Signal Transduction ; bcl-Associated Death Protein ; bcl-X Protein
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Hyperplasia of lymphatic vessels in VEGF-C transgenic mice (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-30
    Description: No growth factors specific for the lymphatic vascular system have yet been described. Vascular endothelial growth factor (VEGF) regulates vascular permeability and angiogenesis, but does not promote lymphangiogenesis. Overexpression of VEGF-C, a ligand of the VEGF receptors VEGFR-3 and VEGFR-2, in the skin of transgenic mice resulted in lymphatic, but not vascular, endothelial proliferation and vessel enlargement. Thus, VEGF-C induces selective hyperplasia of the lymphatic vasculature, which is involved in the draining of interstitial fluid and in immune function, inflammation, and tumor metastasis. VEGF-C may play a role in disorders involving the lymphatic system and may be of potential use in therapeutic lymphangiogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jeltsch, M -- Kaipainen, A -- Joukov, V -- Meng, X -- Lakso, M -- Rauvala, H -- Swartz, M -- Fukumura, D -- Jain, R K -- Alitalo, K -- New York, N.Y. -- Science. 1997 May 30;276(5317):1423-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular/Cancer Biology Laboratory, Haartman Institute, University of Helsinki, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9162011" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cloning, Molecular ; Endothelial Growth Factors/genetics/*physiology ; Endothelium, Lymphatic/physiology/ultrastructure ; Endothelium, Vascular/physiology ; Humans ; Hyperplasia ; Immunohistochemistry ; In Situ Hybridization ; Lymphatic System/*pathology ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Mice, Transgenic ; Molecular Sequence Data ; RNA, Messenger/metabolism ; Receptor Protein-Tyrosine Kinases/metabolism ; Receptors, Cell Surface/metabolism ; Receptors, Growth Factor/metabolism ; Receptors, Vascular Endothelial Growth Factor ; Skin/pathology ; Vascular Endothelial Growth Factor C ; Vascular Endothelial Growth Factor Receptor-3
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    How the malaria parasite manipulates its hosts (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morell, V -- New York, N.Y. -- Science. 1997 Oct 10;278(5336):223.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9340768" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/*parasitology/physiology ; *Biological Evolution ; Bites and Stings ; Host-Parasite Interactions ; Humans ; Malaria/*parasitology ; Mice ; Plasmodium/genetics/*pathogenicity/physiology
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    Positive selection of T cells induced by viral delivery of neopeptides to the thymus (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-31
    Description: The relation between an antigenic peptide that can stimulate a mature T cell and the natural peptide that promoted selection of this cell in the thymus is still unknown. An experimental system was devised to address this issue in vivo-mice expressing neopeptides in thymic stromal cells after adenovirus-mediated delivery of invariant chain-peptide fusion proteins. In this system, selection of T cells capable of responding to a given antigenic peptide could be promoted by the peptide itself, by closely related analogs lacking agonist and antagonist activity, or by ostensibly unrelated peptides. However, the precise repertoire of T cells selected was dictated by the particular neopeptide expressed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakano, N -- Rooke, R -- Benoist, C -- Mathis, D -- New York, N.Y. -- Science. 1997 Jan 31;275(5300):678-83.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Genetique et de Biologie Moleculaire et Cellulaire (INSERM, CNRS, Universite Louis Pasteur), 1 rue Laurent Fries, 67404 Illkirch, C.U. de Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9005856" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics ; Amino Acid Sequence ; Animals ; Antigen-Presenting Cells/immunology ; Antigens, Differentiation, B-Lymphocyte/genetics ; Cells, Cultured ; Cloning, Molecular ; Cross Reactions ; Cytochrome c Group/immunology ; DNA, Complementary/genetics ; Genetic Vectors ; Histocompatibility Antigens Class II/genetics ; Hybridomas ; Interleukin-2/biosynthesis ; *Lymphocyte Activation ; Mice ; Molecular Sequence Data ; Peptides/chemistry/*immunology ; Receptors, Antigen, T-Cell/*immunology ; Recombinant Fusion Proteins ; T-Lymphocytes/*immunology ; Thymus Gland/cytology/*immunology
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    Dynamic molecular combing: stretching the whole human genome for high-resolution studies (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-09-05
    Description: DNA in amounts representative of hundreds of eukaryotic genomes was extended on silanized surfaces by dynamic molecular combing. The precise measurement of hybridized DNA probes was achieved directly without requiring normalization. This approach was validated with the high-resolution mapping of cosmid contigs on a yeast artificial chromosome (YAC) within yeast genomic DNA. It was extended to human genomic DNA for precise measurements ranging from 7 to 150 kilobases, of gaps within a contig, and of microdeletions in the tuberous sclerosis 2 gene on patients' DNA. The simplicity, reproducibility, and precision of this approach makes it a powerful tool for a variety of genomic studies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Michalet, X -- Ekong, R -- Fougerousse, F -- Rousseaux, S -- Schurra, C -- Hornigold, N -- van Slegtenhorst, M -- Wolfe, J -- Povey, S -- Beckmann, J S -- Bensimon, A -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1997 Sep 5;277(5331):1518-23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Biophysique de l'ADN, Departement des Biotechnologies, Institut Pasteur, 25 rue du Dr. Roux, 75724 Paris Cedex 15, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9278517" target="_blank"〉PubMed〈/a〉
    Keywords: Calpain/genetics ; Chromosome Mapping/*methods ; Chromosomes, Artificial, Yeast ; Cloning, Molecular ; Cosmids ; DNA Probes ; Electrophoresis, Gel, Pulsed-Field ; *Genetic Techniques ; *Genome, Fungal ; *Genome, Human ; Humans ; In Situ Hybridization, Fluorescence ; Isoenzymes/genetics ; *Muscle Proteins ; Muscular Dystrophies/genetics ; Mutation ; Proteins/genetics ; Repressor Proteins/genetics ; Reproducibility of Results ; Sequence Deletion ; Silanes ; Tuberous Sclerosis/genetics ; Tumor Suppressor Proteins
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    Nuclear export of NF-ATc enhanced by glycogen synthase kinase-3 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-28
    Description: The transcription factor NF-AT responds to Ca2+-calcineurin signals by translocating to the nucleus, where it participates in the activation of early immune response genes. Calcineurin dephosphorylates conserved serine residues in the amino terminus of NF-AT, resulting in nuclear import. Purification of the NF-AT kinase revealed that it is composed of a priming kinase activity and glycogen synthase kinase-3 (GSK-3). GSK-3 phosphorylates conserved serines necessary for nuclear export, promotes nuclear exit, and thereby opposes Ca2+-calcineurin signaling. Because GSK-3 responds to signals initiated by Wnt and other ligands, NF-AT family members could be effectors of these pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beals, C R -- Sheridan, C M -- Turck, C W -- Gardner, P -- Crabtree, G R -- New York, N.Y. -- Science. 1997 Mar 28;275(5308):1930-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Developmental Biology, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9072970" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Transport ; Brain/enzymology ; COS Cells ; Calcineurin ; Calcium/metabolism ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Calmodulin-Binding Proteins/metabolism ; Cell Nucleus/*metabolism ; Cloning, Molecular ; Cyclic AMP-Dependent Protein Kinases/metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Glycogen Synthase Kinase 3 ; Glycogen Synthase Kinases ; Humans ; Molecular Sequence Data ; NFATC Transcription Factors ; *Nuclear Proteins ; Phosphoprotein Phosphatases/metabolism ; Phosphorylation ; Rats ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transcription Factors/genetics/*metabolism ; Transfection
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    A cyanobacterial phytochrome two-component light sensory system (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-09-05
    Description: The biliprotein phytochrome regulates plant growth and developmental responses to the ambient light environment through an unknown mechanism. Biochemical analyses demonstrate that phytochrome is an ancient molecule that evolved from a more compact light sensor in cyanobacteria. The cyanobacterial phytochrome Cph1 is a light-regulated histidine kinase that mediates red, far-red reversible phosphorylation of a small response regulator, Rcp1 (response regulator for cyanobacterial phytochrome), encoded by the adjacent gene, thus implicating protein phosphorylation-dephosphorylation in the initial step of light signal transduction by phytochrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yeh, K C -- Wu, S H -- Murphy, J T -- Lagarias, J C -- 1 P41 RR06009/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1997 Sep 5;277(5331):1505-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9278513" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Bacterial Proteins ; Cloning, Molecular ; Cyanobacteria/chemistry/genetics/*metabolism ; Genes, Bacterial ; *Light ; Molecular Sequence Data ; Operon ; Phosphorylation ; Protein Kinases/chemistry/genetics/*metabolism ; Proteins ; Recombinant Fusion Proteins/chemistry/metabolism ; Sequence Deletion ; Signal Transduction
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    First nematode-resistance gene found (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moffat, A S -- New York, N.Y. -- Science. 1997 Feb 7;275(5301):757.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9036535" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cloning, Molecular ; *Genes, Plant ; Nematoda/*pathogenicity ; Plant Diseases/*genetics/parasitology ; Transformation, Genetic ; Vegetables/*genetics/*parasitology
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    Regulation of distinct stages of skeletal muscle differentiation by mitogen-activated protein kinases (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-21
    Description: The signal transduction pathway or pathways linking extracellular signals to myogenesis are poorly defined. Upon mitogen withdrawal from C2C12 myoblasts, the mitogen-activated protein kinase (MAPK) p42Erk2 is inactivated concomitant with up-regulation of muscle-specific genes. Overexpression of MAPK phosphatase-1 (MKP-1) inhibited p42Erk2 activity and was sufficient to relieve the inhibitory effects of mitogens on muscle-specific gene expression. Later during myogenesis, endogenous expression of MKP-1 decreased. MKP-1 overexpression during differentiation prevented myotube formation despite appropriate expression of myosin heavy chain. This indicates that muscle-specific gene expression is necessary but not sufficient to commit differentiated myocytes to myotubes and suggests a function for the MAPKs during the early and late stages of skeletal muscle differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bennett, A M -- Tonks, N K -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1288-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, Demerec Building, 1 Bungtown Road, Post Office Box 100, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360925" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; *Cell Cycle Proteins ; Cell Differentiation ; Cell Division ; Cell Line ; Cloning, Molecular ; Culture Media ; Cyclin D1/genetics ; Dual Specificity Phosphatase 1 ; Gene Expression Regulation, Developmental ; Immediate-Early Proteins/genetics/*metabolism ; JNK Mitogen-Activated Protein Kinases ; Mice ; Mitogen-Activated Protein Kinase 1/antagonists & inhibitors/*metabolism ; *Mitogen-Activated Protein Kinases ; Mitogens/pharmacology ; Muscle Proteins/*genetics ; Muscle, Skeletal/*cytology/*enzymology/metabolism ; *Phosphoprotein Phosphatases ; Phosphorylation ; Protein Phosphatase 1 ; Protein Tyrosine Phosphatases/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Tetracycline/pharmacology ; Transcription, Genetic
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    Structure of the carboxyl-terminal dimerization domain of the HIV-1 capsid protein (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-05
    Description: The carboxyl-terminal domain, residues 146 to 231, of the human immunodeficiency virus-1 (HIV-1) capsid protein [CA(146-231)] is required for capsid dimerization and viral assembly. This domain contains a stretch of 20 residues, called the major homology region (MHR), which is conserved across retroviruses and is essential for viral assembly, maturation, and infectivity. The crystal structures of CA(146-231) and CA(151-231) reveal that the globular domain is composed of four helices and an extended amino-terminal strand. CA(146-231) dimerizes through parallel packing of helix 2 across a dyad. The MHR is distinct from the dimer interface and instead forms an intricate hydrogen-bonding network that interconnects strand 1 and helices 1 and 2. Alignment of the CA(146-231) dimer with the crystal structure of the capsid amino-terminal domain provides a model for the intact protein and extends models for assembly of the central conical core of HIV-1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gamble, T R -- Yoo, S -- Vajdos, F F -- von Schwedler, U K -- Worthylake, D K -- Wang, H -- McCutcheon, J P -- Sundquist, W I -- Hill, C P -- R01 AI40333/AI/NIAID NIH HHS/ -- R01 AI43036/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 31;278(5339):849-53.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, 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/9346481" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Capsid/*chemistry/genetics ; Cell Line ; Cloning, Molecular ; Cloning, Organism ; Crystallography, X-Ray ; Dimerization ; HIV-1/*chemistry/genetics/physiology ; Humans ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Peptidylprolyl Isomerase/chemistry ; *Protein Conformation ; Virus Replication
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    Bcl-2: prolonging life in a transgenic mouse model of familial amyotrophic lateral sclerosis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-25
    Description: Mutations in the gene encoding copper/zinc superoxide dismutase enzyme produce an animal model of familial amyotrophic lateral sclerosis (FALS), a fatal disorder characterized by paralysis. Overexpression of the proto-oncogene bcl-2 delayed onset of motor neuron disease and prolonged survival in transgenic mice expressing the FALS-linked mutation in which glycine is substituted by alanine at position 93. It did not, however, alter the duration of the disease. Overexpression of bcl-2 also attenuated the magnitude of spinal cord motor neuron degeneration in the FALS-transgenic mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kostic, V -- Jackson-Lewis, V -- de Bilbao, F -- Dubois-Dauphin, M -- Przedborski, S -- NS01724/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jul 25;277(5325):559-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology, Columbia University, 650 West 168 Street, BB-307, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9228005" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis/genetics/mortality/pathology/*therapy ; Animals ; Disease Models, Animal ; Female ; *Gene Expression ; *Genes, bcl-2 ; *Genetic Therapy ; Humans ; Male ; Mice ; Mice, Transgenic ; Motor Neurons/pathology ; Nerve Degeneration ; Proto-Oncogene Proteins c-bcl-2/*physiology ; Proto-Oncogene Proteins c-jun/analysis ; Spinal Cord/pathology ; Superoxide Dismutase/genetics/metabolism ; Survival Rate ; Ubiquitins/analysis
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  • 80
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    A critical role for tapasin in the assembly and function of multimeric MHC class I-TAP complexes (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-29
    Description: Newly assembled major histocompatibility complex (MHC) class I molecules, together with the endoplasmic reticulum chaperone calreticulin, interact with the transporter associated with antigen processing (TAP) through a molecule called tapasin. The molecular cloning of tapasin revealed it to be a transmembrane glycoprotein encoded by an MHC-linked gene. It is a member of the immunoglobulin superfamily with a probable cytoplasmic endoplasmic reticulum retention signal. Up to four MHC class I-tapasin complexes were found to bind to each TAP molecule. Expression of tapasin in a negative mutant human cell line (220) restored class I-TAP association and normal class I cell surface expression. Tapasin expression also corrected the defective recognition of virus-infected 220 cells by class I-restricted cytotoxic T cells, establishing a critical functional role for tapasin in MHC class I-restricted antigen processing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ortmann, B -- Copeman, J -- Lehner, P J -- Sadasivan, B -- Herberg, J A -- Grandea, A G -- Riddell, S R -- Tampe, R -- Spies, T -- Trowsdale, J -- Cresswell, P -- AI30581/AI/NIAID NIH HHS/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1997 Aug 29;277(5330):1306-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Section of Immunobiology, Yale University School of Medicine, 310 Cedar Street, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9271576" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Binding Cassette Transporters/*metabolism ; Amino Acid Sequence ; Antigen Presentation ; Antiporters/chemistry/genetics/*metabolism ; Calcium-Binding Proteins/metabolism ; Calreticulin ; Cell Line ; Cell Line, Transformed ; Chromosome Mapping ; Chromosomes, Human, Pair 6 ; Cloning, Molecular ; Dimerization ; Endoplasmic Reticulum/metabolism ; Genetic Linkage ; HLA Antigens/*metabolism ; Histocompatibility Antigens Class I/*metabolism ; Humans ; Immunoglobulin G/chemistry ; Immunoglobulins/chemistry/genetics/*metabolism ; Major Histocompatibility Complex/genetics ; Membrane Transport Proteins ; Molecular Sequence Data ; Ribonucleoproteins/metabolism ; Sequence Homology, Amino Acid ; T-Lymphocytes, Cytotoxic ; Tumor Cells, Cultured
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    Induction of cell migration by matrix metalloprotease-2 cleavage of laminin-5 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-11
    Description: Structural changes in the extracellular matrix are necessary for cell migration during tissue remodeling and tumor invasion. Specific cleavage of laminin-5 (Ln-5) by matrix metalloprotease-2 (MMP2) was shown to induce migration of breast epithelial cells. MMP2 cleaved the Ln-5 gamma2 subunit at residue 587, exposing a putative cryptic promigratory site on Ln-5 that triggers cell motility. This altered form of Ln-5 is found in tumors and in tissues undergoing remodeling, but not in quiescent tissues. Cleavage of Ln-5 by MMP2 and the resulting activation of the Ln-5 cryptic site may provide new targets for modulation of tumor cell invasion and tissue remodeling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Giannelli, G -- Falk-Marzillier, J -- Schiraldi, O -- Stetler-Stevenson, W G -- Quaranta, V -- CA47858/CA/NCI NIH HHS/ -- DE10063/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):225-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, 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/9211848" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast/*cytology/metabolism ; Cell Adhesion ; Cell Adhesion Molecules/*metabolism ; Cell Division ; Cell Line ; *Cell Movement ; Cell Size ; Collagenases/metabolism ; Epithelial Cells ; Epithelium/metabolism ; Extracellular Matrix/*metabolism ; Female ; Fibrinolysin/metabolism ; Gelatinases/antagonists & inhibitors/*metabolism ; Humans ; Matrix Metalloproteinase 2 ; Matrix Metalloproteinase 9 ; Metalloendopeptidases/antagonists & inhibitors/*metabolism ; Mice ; Phenylalanine/analogs & derivatives/pharmacology ; Protease Inhibitors/pharmacology ; Rats ; Recombinant Fusion Proteins/metabolism ; Skin Neoplasms/metabolism/pathology ; Thiophenes/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Immunoglobulin E production in the absence of interleukin-4-secreting CD1-dependent cells (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-14
    Description: A lymphocyte population that expresses surface markers found on T cells and natural killer (NK) cells secretes large amounts of interleukin-4 (IL-4) immediately after T cell receptor ligation. These NK-like T cells are thus thought to be important for the initiation of type 2 T helper cell (TH2) responses. CD1-deficient mice were found to lack this lymphocyte subset, but they could nevertheless mount a protypical TH2 response; after immunization with antibody to immunoglobulin D (IgD), CD1-deficient mice produced IgE. Thus, although dependent on CD1 for their development, IL-4-secreting NK-like T cells are not required for TH2 responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smiley, S T -- Kaplan, M H -- Grusby, M J -- R01 A140171/PHS HHS/ -- New York, N.Y. -- Science. 1997 Feb 14;275(5302):977-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology, Harvard School of Public Health (HSPH), Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9020080" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/immunology ; Antibodies, Anti-Idiotypic/immunology ; Antigens, CD1/genetics/*physiology ; Antigens, CD3/immunology ; Cells, Cultured ; Gene Targeting ; Immunoglobulin D/immunology ; Immunoglobulin E/*biosynthesis ; Immunophenotyping ; Interferon-gamma/genetics/secretion ; Interleukin-4/biosynthesis/genetics/*secretion ; Killer Cells, Natural/immunology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; RNA, Messenger/genetics/metabolism ; Receptors, Antigen, T-Cell/immunology ; T-Lymphocyte Subsets/*immunology ; Th2 Cells/immunology ; beta 2-Microglobulin/genetics/physiology
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    Transgenic knockout mice with exclusively human sickle hemoglobin and sickle cell disease (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-05
    Description: To create mice expressing exclusively human sickle hemoglobin (HbS), transgenic mice expressing human alpha-, gamma-, and betaS-globin were generated and bred with knockout mice that had deletions of the murine alpha- and beta-globin genes. These sickle cell mice have the major features (irreversibly sickled red cells, anemia, multiorgan pathology) found in humans with sickle cell disease and, as such, represent a useful in vivo system to accelerate the development of improved therapies for this common genetic disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paszty, C -- Brion, C M -- Manci, E -- Witkowska, H E -- Stevens, M E -- Mohandas, N -- Rubin, E M -- HL20985/HL/NHLBI NIH HHS/ -- HL31579/HL/NHLBI NIH HHS/ -- N01-HB-07086/HB/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 31;278(5339):876-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Genome Center and Department of Subcellular Structure, Lawrence Berkeley National Laboratory, 1 Cyclotron Road (MS 74-157), University of California, Berkeley, CA 94720, USA. c_paszty@csa2.lbl.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9346488" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Sickle Cell/*genetics/pathology ; Animals ; Disease Models, Animal ; Female ; Globins/genetics ; Hemoglobin, Sickle/genetics ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Transgenic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 84
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    Essential role of growth hormone in ischemia-induced retinal neovascularization (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-06-13
    Description: Retinal neovascularization is the major cause of untreatable blindness. The role of growth hormone (GH) in ischemia-associated retinal neovascularization was studied in transgenic mice expressing a GH antagonist gene and in normal mice given an inhibitor of GH secretion (MK678). Retinal neovascularization was inhibited in these mice in inverse proportion to serum levels of GH and a downstream effector, insulin-like growth factor-I (IGF-I). Inhibition was reversed with exogenous IGF-I administration. GH inhibition did not diminish hypoxia-stimulated retinal vascular endothelial growth factor (VEGF) or VEGF receptor expression. These data suggest that systemic inhibition of GH or IGF-I, or both, may have therapeutic potential in preventing some forms of retinopathy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, L E -- Kopchick, J J -- Chen, W -- Knapp, J -- Kinose, F -- Daley, D -- Foley, E -- Smith, R G -- Schaeffer, J M -- EY08670/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1706-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ophthalmology, Harvard Medical School and Children's Hospital, Boston, MA 02115, USA. smith_lo@a1.tch.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180082" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Endothelial Growth Factors/genetics/metabolism ; Growth Hormone/agonists/antagonists & inhibitors/blood/pharmacology/*physiology ; Hormone Antagonists/pharmacology ; Insulin-Like Growth Factor I/metabolism/pharmacology ; Ischemia ; Lymphokines/genetics/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Peptides, Cyclic/pharmacology ; Recombinant Proteins/pharmacology ; Retinal Neovascularization/*etiology/metabolism/pathology ; Retinal Vessels ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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    Control of filament formation in Candida albicans by the transcriptional repressor TUP1 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-04
    Description: The pathogenic yeast Candida albicans regulates its cellular morphology in response to environmental conditions. Ellipsoidal, single cells (blastospores) predominate in rich media, whereas filaments composed of elongated cells that are attached end-to-end form in response to starvation, serum, and other conditions. The TUP1 gene, which encodes a general transcriptional repressor in Saccharomyces cerevisiae, was isolated from C. albicans and disrupted. The resulting tup1 mutant strain of C. albicans grew exclusively as filaments under all conditions tested. TUP1 was epistatic to the transcriptional activator CPH1, previously found to promote filamentous growth. The results suggest a model where TUP1 represses genes responsible for initiating filamentous growth and this repression is lifted under inducing environmental conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Braun, B R -- Johnson, A D -- GM37049/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Jul 4;277(5322):105-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143-0414, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9204892" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Candida albicans/*cytology/*genetics/growth & development/metabolism ; Cloning, Molecular ; Culture Media ; DNA-Binding Proteins/metabolism ; Epistasis, Genetic ; Fungal Proteins/chemistry/*genetics/*metabolism ; Gene Deletion ; Genes, Fungal ; Glycerol/metabolism ; Models, Genetic ; Molecular Sequence Data ; Mutation ; *Nuclear Proteins ; Phenotype ; Repressor Proteins/genetics/*metabolism ; *Saccharomyces cerevisiae Proteins ; Sequence Alignment ; Temperature ; Transcription Factors/metabolism ; Transcription, Genetic
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    LKLF: A transcriptional regulator of single-positive T cell quiescence and survival (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-09-26
    Description: Mature single-positive (SP) T lymphocytes enter a "resting" state in which they are proliferatively quiescent and relatively resistant to apoptosis. The molecular mechanisms regulating this quiescent phenotype were unknown. Here it was found that the expression of a Kruppel-like zinc finger transcription factor, lung Kruppel-like factor (LKLF), is developmentally induced during the maturation of SP quiescent T cells and rapidly extinguished after SP T cell activation. LKLF-deficient T cells produced by gene targeting had a spontaneously activated phenotype and died in the spleen and lymph nodes from Fas ligand-induced apoptosis. Thus, LKLF is required to program the quiescent state of SP T cells and to maintain their viability in the peripheral lymphoid organs and blood.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuo, C T -- Veselits, M L -- Leiden, J M -- AI29637/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1997 Sep 26;277(5334):1986-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Chicago, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9302292" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD95/biosynthesis ; Apoptosis ; B-Lymphocytes/metabolism ; Cell Survival ; Chimera ; Fas Ligand Protein ; Gene Deletion ; Gene Targeting ; *Interphase ; Kruppel-Like Transcription Factors ; Lymph Nodes/cytology ; Lymphocyte Activation ; Membrane Glycoproteins/biosynthesis ; Mice ; Mice, Inbred C57BL ; Spleen/cytology ; T-Lymphocyte Subsets/metabolism ; T-Lymphocytes/*cytology/*immunology/metabolism ; Trans-Activators/biosynthesis/genetics/*physiology ; Transfection ; *Zinc Fingers
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  • 87
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    Flexibility in DNA recombination: structure of the lambda integrase catalytic core (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-04-04
    Description: Lambda integrase is archetypic of site-specific recombinases that catalyze intermolecular DNA rearrangements without energetic input. DNA cleavage, strand exchange, and religation steps are linked by a covalent phosphotyrosine intermediate in which Tyr342 is attached to the 3'-phosphate of the DNA cut site. The 1.9 angstrom crystal structure of the integrase catalytic domain reveals a protein fold that is conserved in organisms ranging from archaebacteria to yeast and that suggests a model for interaction with target DNA. The attacking Tyr342 nucleophile is located on a flexible loop about 20 angstroms from a basic groove that contains all the other catalytically essential residues. This bipartite active site can account for several apparently paradoxical features of integrase family recombinases, including the capacity for both cis and trans cleavage of DNA.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1839824/" 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/PMC1839824/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kwon, H J -- Tirumalai, R -- Landy, A -- Ellenberger, T -- AI13544/AI/NIAID NIH HHS/ -- GM33928/GM/NIGMS NIH HHS/ -- R01 GM033928/GM/NIGMS NIH HHS/ -- R01 GM062723/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1997 Apr 4;276(5309):126-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9082984" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Attachment Sites, Microbiological ; Bacteriophage lambda/*enzymology ; Binding Sites ; Cloning, Molecular ; Conserved Sequence ; Crystallography, X-Ray ; DNA/*metabolism ; DNA Nucleotidyltransferases/chemistry/metabolism ; Hydrogen Bonding ; Integrases/*chemistry/metabolism ; Models, Molecular ; Molecular Sequence Data ; *Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Recombinases ; *Recombination, Genetic ; Tyrosine/chemistry/metabolism ; Virus Integration
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  • 88
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    Antigen presentation: a balanced diet (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-07-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brenner, M -- Porcelli, S -- New York, N.Y. -- Science. 1997 Jul 18;277(5324):332.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Rheumatology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. emontes@bics.bwh.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9518365" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Antigens, CD1/*chemistry/immunology/metabolism ; Glycolipids/immunology/metabolism ; Histocompatibility Antigens/chemistry/immunology/metabolism ; Humans ; Hydrogen Bonding ; Lipid Metabolism ; Lipids/immunology ; Mice ; *Protein Conformation ; T-Lymphocytes/immunology
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    A TEL-JAK2 fusion protein with constitutive kinase activity in human leukemia (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-11-21
    Description: The Janus family of tyrosine kinases (JAK) plays an essential role in development and in coupling cytokine receptors to downstream intracellular signaling events. A t(9;12)(p24;p13) chromosomal translocation in a T cell childhood acute lymphoblastic leukemia patient was characterized and shown to fuse the 3' portion of JAK2 to the 5' region of TEL, a gene encoding a member of the ETS transcription factor family. The TEL-JAK2 fusion protein includes the catalytic domain of JAK2 and the TEL-specific oligomerization domain. TEL-induced oligomerization of TEL-JAK2 resulted in the constitutive activation of its tyrosine kinase activity and conferred cytokine-independent proliferation to the interleukin-3-dependent Ba/F3 hematopoietic cell line.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lacronique, V -- Boureux, A -- Valle, V D -- Poirel, H -- Quang, C T -- Mauchauffe, M -- Berthou, C -- Lessard, M -- Berger, R -- Ghysdael, J -- Bernard, O A -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1309-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U 301 de l'Institut National de la Sante et de la Recherche Medicale and SD 401 No. 301 CNRS, Institut de Genetique Moleculaire, 27 rue Juliette Dodu, 75010 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360930" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Biopolymers ; Cell Division ; Cell Line ; Child, Preschool ; DNA-Binding Proteins/chemistry/genetics/metabolism ; Enzyme Activation ; Humans ; Interleukin-3/physiology ; Janus Kinase 2 ; Leukemia-Lymphoma, Adult T-Cell/genetics/*metabolism ; Male ; Mice ; *Milk Proteins ; Molecular Sequence Data ; Oncogene Proteins, Fusion/chemistry/genetics/*metabolism ; Phosphorylation ; Protein-Tyrosine Kinases/chemistry/genetics/*metabolism ; *Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-ets ; *Repressor Proteins ; STAT5 Transcription Factor ; Signal Transduction ; Trans-Activators/metabolism ; Transcription Factors/chemistry/genetics/metabolism ; Transfection ; Translocation, Genetic
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  • 90
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    DCP-1, a Drosophila cell death protease essential for development (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-24
    Description: Apoptosis, a form of cellular suicide, involves the activation of CED-3-related cysteine proteases (caspases). The regulation of caspases by apoptotic signals and the precise mechanism by which they kill the cell remain unknown. In Drosophila, different death-inducing stimuli induce the expression of the apoptotic activator reaper. Cell killing by reaper and two genetically linked apoptotic activators, hid and grim, requires caspase activity. A Drosophila caspase, named Drosophila caspase-1 (DCP-1), was identified and found to be structurally and biochemically similar to Caenorhabditis elegans CED-3. Loss of zygotic DCP-1 function in Drosophila caused larval lethality and melanotic tumors, showing that this gene is essential for normal development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Song, Z -- McCall, K -- Steller, H -- New York, N.Y. -- Science. 1997 Jan 24;275(5299):536-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Brain and Cognitive Sciences, 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/8999799" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Apoptosis ; Caenorhabditis elegans Proteins ; *Caspases ; Cloning, Molecular ; Cysteine Endopeptidases/chemistry/genetics/*metabolism ; DNA Fragmentation ; DNA Transposable Elements ; Drosophila/embryology/*enzymology/genetics ; Drosophila Proteins ; Embryo, Nonmammalian/enzymology ; Gene Deletion ; Genes, Insect ; HeLa Cells ; Helminth Proteins/chemistry/metabolism ; Humans ; Molecular Sequence Data ; Mutation ; RNA, Messenger/genetics/metabolism ; Sequence Homology, Amino Acid
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    Functional coherence of the human Y chromosome (1997)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1997-10-24
    Description: A systematic search of the nonrecombining region of the human Y chromosome (NRY) identified 12 novel genes or families, 10 with full-length complementary DNA sequences. All 12 genes, and six of eight NRY genes or families previously isolated by less systematic means, fell into two classes. Genes in the first group were expressed in many organs; these housekeeping genes have X homologs that escape X inactivation. The second group, consisting of Y-chromosomal gene families expressed specifically in testes, may account for infertility among men with Y deletions. The coherence of the NRY's gene content contrasts with the apparently haphazard content of most eukaryotic chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lahn, B T -- Page, D C -- New York, N.Y. -- Science. 1997 Oct 24;278(5338):675-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Whitehead Institute, and Department of Biology, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9381176" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Biological Evolution ; Chromosome Mapping ; Cloning, Molecular ; DNA, Complementary ; Dosage Compensation, Genetic ; Gene Dosage ; Gene Expression ; *Genes ; Humans ; Infertility, Male/genetics ; Male ; Molecular Sequence Data ; Multigene Family ; Proteins ; Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Seminal Plasma Proteins ; Sequence Analysis, DNA ; Spermatogenesis/genetics ; Testis/metabolism ; X Chromosome/genetics ; Y Chromosome/*genetics
    Print ISSN: 0036-8075
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  • 92
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    Prevention of mucosal Escherichia coli infection by FimH-adhesin-based systemic vaccination (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-04-25
    Description: Virtually all uropathogenic strains of Escherichia coli, the primary cause of cystitis, assemble adhesive surface organelles called type 1 pili that contain the FimH adhesin. Sera from animals vaccinated with candidate FimH vaccines inhibited uropathogenic E. coli from binding to human bladder cells in vitro. Immunization with FimH reduced in vivo colonization of the bladder mucosa by more than 99 percent in a murine cystitis model, and immunoglobulin G to FimH was detected in urinary samples from protected mice. Furthermore, passive systemic administration of immune sera to FimH also resulted in reduced bladder colonization by uropathogenic E. coli. This approach may represent a means of preventing recurrent and acute infections of the urogenital mucosa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Langermann, S -- Palaszynski, S -- Barnhart, M -- Auguste, G -- Pinkner, J S -- Burlein, J -- Barren, P -- Koenig, S -- Leath, S -- Jones, C H -- Hultgren, S J -- R01DK51406/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):607-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MedImmune, Inc., Gaithersburg, MD 20878, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9110982" target="_blank"〉PubMed〈/a〉
    Keywords: Adhesins, Bacterial/*immunology/metabolism ; *Adhesins, Escherichia coli ; Animals ; Antibodies, Bacterial/analysis/immunology ; Bacterial Adhesion ; *Bacterial Vaccines/administration & dosage/immunology ; Child ; Cystitis/immunology/*prevention & control ; Epithelium/microbiology ; Escherichia coli/immunology/metabolism/pathogenicity ; Escherichia coli Infections/immunology/*prevention & control ; Female ; *Fimbriae Proteins ; Fimbriae, Bacterial/immunology ; Humans ; Immunity, Mucosal ; Mice ; Mice, Inbred C3H ; Neutrophils/immunology ; Rabbits ; Urinary Bladder/microbiology ; Vaccination ; *Vaccines, Synthetic/administration & dosage/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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  • 93
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    Spatially and functionally distinct Ca2+ stores in sarcoplasmic and endoplasmic reticulum (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-14
    Description: The organization of calcium (Ca2+) stores in the sarcoplasmic and endoplasmic reticulum (S-ER) is poorly understood. The dynamics of the storage and release of calcium in the S-ER of intact, cultured astrocytes and arterial myocytes were studied with high-resolution imaging methods. The S-ER appeared to be a continuous tubular network; nevertheless, calcium stores in the S-ER were organized into small, spatially distinct compartments that functioned as discrete units. Cyclopiazonic acid (an inhibitor of the calcium pump in the S-ER membrane) and caffeine or ryanodine unloaded different, spatially separate compartments. Heterogeneity of calcium stores was also revealed in cells activated by physiological agonists. These results suggest that cells can generate spatially and temporally distinct calcium signals to control individual calcium-dependent processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Golovina, V A -- Blaustein, M P -- HL-32276/HL/NHLBI NIH HHS/ -- NS-16106/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 14;275(5306):1643-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology and Center for Vascular Biology and Hypertension, University of Maryland School of Medicine, Baltimore, MD 21201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9054358" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/*metabolism/ultrastructure ; Caffeine/pharmacology ; Calcium/*metabolism ; Calcium-Transporting ATPases/antagonists & inhibitors ; Cells, Cultured ; Endoplasmic Reticulum, Smooth/*metabolism/ultrastructure ; Fluorescent Dyes/metabolism ; Fura-2/analogs & derivatives/metabolism ; Glutamic Acid/pharmacology ; Indoles/pharmacology ; Mice ; Mitochondria/metabolism ; Mitochondria, Muscle/metabolism ; Muscle, Smooth, Vascular/cytology/*metabolism/ultrastructure ; Rats ; Ryanodine/pharmacology ; Sarcoplasmic Reticulum/*metabolism/ultrastructure ; Serotonin/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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  • 94
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    Altered neural cell fates and medulloblastoma in mouse patched mutants (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-22
    Description: The PATCHED (PTC) gene encodes a Sonic hedgehog (Shh) receptor and a tumor suppressor protein that is defective in basal cell nevus syndrome (BCNS). Functions of PTC were investigated by inactivating the mouse gene. Mice homozygous for the ptc mutation died during embryogenesis and were found to have open and overgrown neural tubes. Two Shh target genes, ptc itself and Gli, were derepressed in the ectoderm and mesoderm but not in the endoderm. Shh targets that are, under normal conditions, transcribed ventrally were aberrantly expressed in dorsal and lateral neural tube cells. Thus Ptc appears to be essential for repression of genes that are locally activated by Shh. Mice heterozygous for the ptc mutation were larger than normal, and a subset of them developed hindlimb defects or cerebellar medulloblastomas, abnormalities also seen in BCNS patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodrich, L V -- Milenkovic, L -- Higgins, K M -- Scott, M P -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1109-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305-5427, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9262482" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Multiple/genetics ; Animals ; Body Patterning ; Cell Lineage ; Central Nervous System/cytology/*embryology ; Cerebellar Neoplasms/*genetics/pathology ; Ectoderm/metabolism ; Endoderm/metabolism ; *Gene Expression Regulation, Developmental ; Genes, Tumor Suppressor ; Heterozygote ; Homozygote ; Intracellular Signaling Peptides and Proteins ; Medulloblastoma/*genetics/pathology ; Membrane Proteins/*genetics/physiology ; Mesoderm/metabolism ; Mice ; Mice, Inbred C57BL ; Mutation ; Oncogene Proteins/genetics ; Receptors, Cell Surface ; Trans-Activators ; Transcription Factors/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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  • 95
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    Transmission of the BSE agent to mice in the absence of detectable abnormal prion protein (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-17
    Description: The agent responsible for transmissible spongiform encephalopathies (TSEs) is thought to be a malfolded, protease-resistant version (PrPres) of the normal cellular prion protein (PrP). The interspecies transmission of bovine spongiform encephalopathy (BSE) to mice was studied. Although all of the mice injected with homogenate from BSE-infected cattle brain exhibited neurological symptoms and neuronal death, more than 55 percent had no detectable PrPres. During serial passage, PrPres appeared after the agent became adapted to the new host. Thus, PrPres may be involved in species adaptation, but a further unidentified agent may actually transmit BSE.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lasmezas, C I -- Deslys, J P -- Robain, O -- Jaegly, A -- Beringue, V -- Peyrin, J M -- Fournier, J G -- Hauw, J J -- Rossier, J -- Dormont, D -- New York, N.Y. -- Science. 1997 Jan 17;275(5298):402-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Commissariat a l'Energie Atomique, Service de Neurovirologie, DSV/DRM/SSA, B.P. 6, 60-68 avenue du General Leclerc, 92265 Fontenay-aux-Roses Cedex, France. CORINNE.LASMEZAS@cea.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8994041" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Astrocytes/pathology ; Brain/pathology ; *Brain Chemistry ; Cattle ; Encephalopathy, Bovine Spongiform/metabolism/pathology/*transmission ; Endopeptidases/metabolism ; Mice ; Mice, Inbred C57BL ; Nerve Tissue Proteins/*analysis ; Phenotype ; Prions/*analysis ; Purkinje Cells/pathology ; Serial Passage ; Time Factors ; Vacuoles/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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  • 96
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    The architecture of hearing (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1223-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9411747" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Animals ; Carrier Proteins/*genetics/physiology ; Chromosome Mapping ; Cilia/ultrastructure ; Cochlea/metabolism ; Connexins/*genetics ; Deafness/*genetics/pathology ; Dyneins ; Female ; Gap Junctions/physiology/ultrastructure ; Genes, Recessive ; Hair Cells, Auditory/physiology/ultrastructure ; Humans ; Male ; Mice ; Mice, Neurologic Mutants ; Mutation ; Myosins/*genetics ; Pedigree
    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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  • 97
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    Gene found for the fading eyesight of old age (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1997 Sep 19;277(5333):1765-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9324766" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Binding Cassette Transporters/*genetics/metabolism ; Animals ; Biological Transport ; Cell Membrane/metabolism ; Chromosomes, Human, Pair 1 ; Humans ; Macular Degeneration/*genetics/metabolism ; Mice ; Mice, Knockout ; Mutation ; Photoreceptor Cells/*metabolism ; Pigment Epithelium of Eye/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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  • 98
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    Tyrosine phosphorylation of transmembrane ligands for Eph receptors (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-14
    Description: Axonal pathfinding in the nervous system is mediated in part by cell-to-cell signaling events involving members of the Eph receptor tyrosine kinase (RTK) family and their membrane-bound ligands. Genetic evidence suggests that transmembrane ligands may transduce signals in the developing embryo. The cytoplasmic domain of the transmembrane ligand Lerk2 became phosphorylated on tyrosine residues after contact with the Nuk/Cek5 receptor ectodomain, which suggests that Lerk2 has receptorlike intrinsic signaling potential. Moreover, Lerk2 is an in vivo substrate for the platelet-derived growth factor receptor, which suggests crosstalk between Lerk2 signaling and signaling cascades activated by tyrosine kinases. It is proposed that transmembrane ligands of Eph receptors act not only as conventional RTK ligands but also as receptorlike signaling molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bruckner, K -- Pasquale, E B -- Klein, R -- EY10576/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1997 Mar 14;275(5306):1640-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany. USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9054357" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Axons/physiology ; Brain-Derived Neurotrophic Factor/metabolism ; Cell Membrane/*metabolism ; Embryo, Mammalian/metabolism ; Ephrin-B1 ; Ligands ; Mice ; Phosphorylation ; Phosphotyrosine/*metabolism ; Platelet-Derived Growth Factor/pharmacology ; Proteins/*metabolism/pharmacology ; Receptor Protein-Tyrosine Kinases/*metabolism ; Receptor, Ciliary Neurotrophic Factor ; Receptor, EphB2 ; Receptors, Nerve Growth Factor/metabolism ; Receptors, Platelet-Derived Growth Factor/metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; 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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  • 99
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    Transgenic lambs from cloning lab (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1997 Aug 1;277(5326):631.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9254425" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Genetically Modified ; Cloning, Molecular ; Embryo Transfer ; Fetus/cytology ; Fibroblasts/cytology ; *Genetic Engineering ; Genetic Markers ; Humans ; Membrane Fusion ; Nuclear Transfer Techniques ; Ovum/physiology ; Sheep/embryology/*genetics ; *Transgenes
    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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  • 100
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    The transcriptional paradox: octamer factors and B and T cells (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Graef, I A -- Crabtree, G R -- New York, N.Y. -- Science. 1997 Jul 11;277(5323):193-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Biology, Stanford Medical School, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9235633" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*metabolism ; DNA-Binding Proteins/*metabolism ; Homeodomain Proteins/*metabolism ; Host Cell Factor C1 ; Interleukin-2/genetics ; Lymphocyte Activation ; Mice ; Octamer Transcription Factor-1 ; Octamer Transcription Factor-2 ; Signal Transduction ; T-Lymphocytes/*metabolism ; Trans-Activators/*metabolism ; Transcription Factors/*metabolism ; *Transcription, Genetic
    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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