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  • GEOPHYSICS
  • Mice
  • SPACE RADIATION
  • 1995-1999  (26)
  • 1985-1989
  • 1997  (26)
  • 1
    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
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    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
    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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  • 3
    Publication Date: 1997-04-25
    Description: The gene encoding the BCL-6 transcriptional repressor is frequently translocated and mutated in diffuse large cell lymphoma. Mice with a disrupted BCL-6 gene developed myocarditis and pulmonary vasculitis, had no germinal centers, and had increased expression of T helper cell type 2 cytokines. The BCL-6 DNA recognition motif resembled sites bound by the STAT (signal transducers and activators of transcription) transcription factors, which mediate cytokine signaling. BCL-6 could repress interleukin-4 (IL-4)-induced transcription when bound to a site recognized by the IL-4-responsive transcription factor Stat6. Thus, dysregulation of STAT-responsive genes may underlie the inflammatory disease in BCL-6-deficient mice and participate in lymphoid malignancies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dent, A L -- Shaffer, A L -- Yu, X -- Allman, D -- Staudt, L M -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):589-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Metabolism Branch, National Cancer Institute, 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/9110977" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/immunology ; Cells, Cultured ; Cytokines/*biosynthesis ; DNA-Binding Proteins/genetics/*physiology ; Ficoll/analogs & derivatives/immunology ; Germinal Center/*immunology ; Hemocyanin/immunology ; Immunoglobulins/biosynthesis ; Inflammation/*immunology/pathology ; Interferon-gamma/biosynthesis ; Interleukin-4/metabolism ; Interleukins/biosynthesis/metabolism ; Lymphocyte Activation ; Mice ; Myocarditis/immunology/pathology ; Proto-Oncogene Proteins/genetics/*physiology ; Proto-Oncogene Proteins c-bcl-6 ; Receptors, IgE/genetics ; STAT6 Transcription Factor ; Signal Transduction ; Spleen/immunology ; T-Lymphocytes/immunology ; Th2 Cells/immunology ; Trans-Activators/metabolism ; Transcription Factors/genetics/*physiology ; Transcription, Genetic ; Trinitrobenzenes/immunology ; Vasculitis/immunology/pathology
    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
    Publication Date: 1997-04-11
    Description: Dopamine neurons of the substantia nigra and ventral tegmental area regulate movement and affective behavior and degenerate in Parkinson's disease. The orphan nuclear receptor Nurr1 was shown to be expressed in developing dopamine neurons before the appearance of known phenotypic markers for these cells. Mice lacking Nurr1 failed to generate midbrain dopaminergic neurons, were hypoactive, and died soon after birth. Nurr1 expression continued into adulthood, and brains of heterozygous animals, otherwise apparently healthy, contained reduced dopamine levels. These results suggest that putative Nurr1 ligands may be useful for treatment of Parkinson's disease and other disorders of midbrain dopamine circuitry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zetterstrom, R H -- Solomin, L -- Jansson, L -- Hoffer, B J -- Olson, L -- Perlmann, T -- New York, N.Y. -- Science. 1997 Apr 11;276(5310):248-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Karolinska Institute, S-171 77 Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9092472" target="_blank"〉PubMed〈/a〉
    Keywords: 3,4-Dihydroxyphenylacetic Acid/metabolism ; Animals ; Cell Differentiation ; Chromatography, High Pressure Liquid ; Corpus Striatum/metabolism ; *DNA-Binding Proteins ; Dopamine/biosynthesis/*metabolism ; Gene Targeting ; Heterozygote ; Ligands ; Mesencephalon/abnormalities/*cytology/growth & development/metabolism ; Mice ; Nerve Tissue Proteins/genetics/*metabolism ; Neurons/*cytology/*metabolism ; Nuclear Receptor Subfamily 4, Group A, Member 2 ; RNA, Messenger/genetics/metabolism ; Transcription Factors/genetics/*metabolism
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  • 5
    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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  • 6
    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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1997-10-23
    Description: Although previous analyses indicate that neocortical neurons originate from the cortical proliferative zone, evidence suggests that a subpopulation of neocortical interneurons originates within the subcortical telencephalon. For example, gamma-aminobutyric acid (GABA)-expressing cells migrate in vitro from the subcortical telencephalon into the neocortex. The number of GABA-expressing cells in neocortical slices is reduced by separating the neocortex from the subcortical telencephalon. Finally, mice lacking the homeodomain proteins DLX-1 and DLX-2 show no detectable cell migration from the subcortical telencephalon to the neocortex and also have few GABA-expressing cells in the neocortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, S A -- Eisenstat, D D -- Shi, L -- Rubenstein, J L -- K02 MH01046/MH/NIMH NIH HHS/ -- R01 MH51561/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 17;278(5337):474-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nina Ireland Laboratory of Developmental Neurobiology, Center for Neurobiology and Psychiatry, Department of Psychiatry, University of California at San Francisco, CA 94143-0984, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9334308" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calbindins ; Cell Movement ; Corpus Striatum/*cytology/embryology/metabolism ; Culture Techniques ; DNA-Binding Proteins/*genetics/physiology ; *Genes, Homeobox ; Glutamate Decarboxylase/metabolism ; Homeodomain Proteins/*genetics/physiology ; Interneurons/chemistry/*physiology ; Mice ; Mutation ; Neocortex/*cytology/embryology/metabolism ; S100 Calcium Binding Protein G/analysis ; Telencephalon/*cytology/embryology/metabolism ; Transcription Factors ; gamma-Aminobutyric Acid/analysis
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  • 8
    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
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  • 9
    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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  • 10
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    American Association for the Advancement of Science (AAAS)
    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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