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  • Molecular Sequence Data  (161)
  • Humans  (155)
  • 1990-1994  (245)
  • 1
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    Psychological responses after abortion (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-04-06
    Description: A review of methodologically sound studies of the psychological responses of U.S. women after they obtained legal, nonrestrictive abortions indicates that distress is generally greatest before the abortion and that the incidence of severe negative responses is low. Factors associated with increased risk of negative response are consistent with those reported in research on other stressful life events.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adler, N E -- David, H P -- Major, B N -- Roth, S H -- Russo, N F -- Wyatt, G E -- New York, N.Y. -- Science. 1990 Apr 6;248(4951):41-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of California, San Francisco 94143.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2181664" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Induced/*psychology ; Adaptation, Psychological ; Adolescent ; Emotions ; Female ; Humans ; Pregnancy ; Pregnancy Trimester, First ; *Pregnant Women ; Risk Assessment ; Social Support ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Released form of CNTF receptor alpha component as a soluble mediator of CNTF responses (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-03-19
    Description: The alpha component of the receptor for ciliary neurotrophic factor (CNTF) differs from other known growth factor receptors in that it is anchored to cell membranes by a glycosylphosphatidylinositol linkage. One possible function of this type of linkage is to allow for the regulated release of this receptor component. Cell lines not normally responsive to CNTF responded to treatment with a combination of CNTF and a soluble form of the CNTF alpha receptor component. These findings not only demonstrate that the CNTF receptor alpha chain is a required component of the functional CNTF receptor complex but also reveal that it can function in soluble form as part of a heterodimeric ligand. Potential physiological roles for the soluble CNTF receptor are suggested by its presence in cerebrospinal fluid and by its release from skeletal muscle in response to peripheral nerve injury.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, S -- Aldrich, T H -- Ip, N Y -- Stahl, N -- Scherer, S -- Farruggella, T -- DiStefano, P S -- Curtis, R -- Panayotatos, N -- Gascan, H -- New York, N.Y. -- Science. 1993 Mar 19;259(5102):1736-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Regeneron Pharmaceuticals, Inc., Tarrytown, NY 10591.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7681218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation/drug effects ; Cell Division/drug effects ; Cell Membrane/metabolism ; Ciliary Neurotrophic Factor ; Cloning, Molecular ; Gene Expression ; Glycosylphosphatidylinositols/metabolism ; Growth Inhibitors/pharmacology ; Hematopoietic Stem Cells/cytology/drug effects ; Humans ; Interleukin-6/pharmacology ; Leukemia Inhibitory Factor ; Lymphokines/pharmacology ; Mice ; Muscle Denervation ; Muscles/innervation/metabolism ; Nerve Tissue Proteins/*pharmacology ; Phosphatidylinositol Diacylglycerol-Lyase ; Phosphoric Diester Hydrolases/metabolism ; Phosphotyrosine ; RNA, Messenger/genetics ; Rats ; Receptor, Ciliary Neurotrophic Factor ; Receptors, Cell Surface/chemistry/*physiology ; Signal Transduction/physiology ; Tumor Cells, Cultured ; Tyrosine/analogs & derivatives/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Control of the interferon-induced 68-kilodalton protein kinase by the HIV-1 tat gene product (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-03-09
    Description: The tat-responsive region (TAR) of the human immunodeficiency virus-1 (HIV-1) exhibits a trans-inhibitory effect on translation in vitro by activating the interferon-induced 68-kilodalton protein kinase (p68 kinase). Productive infection by HIV-1 was shown to result in a significant decrease in the amount of cellular p68 kinase. The steady-state amount of p68 kinase was also reduced in interferon-treated HeLa cell lines stably expressing tat, as compared to the amount of the kinase in interferon-treated control HeLa cells. Thus, the potential translational inhibitory effects of the TAR RNA region mediated by activation of p68 kinase may be downregulated by tat during productive HIV-1 infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roy, S -- Katze, M G -- Parkin, N T -- Edery, I -- Hovanessian, A G -- Sonenberg, N -- AI22646/AI/NIAID NIH HHS/ -- RR00166/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1990 Mar 9;247(4947):1216-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, McGill University, Montreal, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2180064" target="_blank"〉PubMed〈/a〉
    Keywords: 2',5'-Oligoadenylate Synthetase/genetics ; Down-Regulation ; Enzyme Induction ; *Gene Expression Regulation, Enzymologic ; Gene Products, tat/*physiology ; *Genes, Viral ; *Genes, tat ; HIV-1/*genetics ; HeLa Cells ; Humans ; Immunosorbent Techniques ; Interferon Type I/*pharmacology ; Molecular Weight ; Protein Kinases/biosynthesis/*genetics ; Trans-Activators/*physiology ; Transfection ; tat Gene Products, Human Immunodeficiency Virus
    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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    Translational potentiation of messenger RNA with secondary structure in Xenopus (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-02-15
    Description: Differential translation of messenger RNA (mRNA) with stable secondary structure in the 5' untranslated leader may contribute to the dramatic changes in protein synthetic patterns that occur during oogenesis and early development. Plasmids that contained the bacterial gene chloramphenicol acetyltransferase and which encoded mRNA with (hpCAT) or without (CAT) a stable hairpin secondary structure in the 5' noncoding region were transcribed in vitro, and the resulting mRNAs were injected into Xenopus oocytes, eggs, and early embryos. During early oogenesis, hpCAT mRNA was translated at less than 3 percent of the efficiency of CAT mRNA. The relative translational potential of hpCAT reached 100 percent in the newly fertilized egg and returned to approximately 3 percent after the midblastula transition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fu, L N -- Ye, R Q -- Browder, L W -- Johnston, R N -- New York, N.Y. -- Science. 1991 Feb 15;251(4995):807-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, University of Calgary, Alberta, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1990443" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chloramphenicol O-Acetyltransferase/genetics ; Egg Proteins/biosynthesis/genetics ; Molecular Sequence Data ; Nucleic Acid Conformation ; Oogenesis/genetics ; Plasmids ; *Protein Biosynthesis ; RNA, Messenger/*genetics ; Xenopus laevis/embryology/*genetics
    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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    Cooperativity induced by a single mutation at the subunit interface of a dimeric enzyme: glutathione reductase (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-11-13
    Description: When glycine418 of Escherichia coli glutathione reductase, which is in a closely packed region of the dimer interface, is replaced with a bulky tryptophan residue, the enzyme becomes highly cooperative (Hill coefficient 1.76) for glutathione binding. The cooperativity is lost when the mutant subunit is hybridized with a wild-type subunit to create a heterodimer. The mutation appears to disrupt atomic packing at the dimer interface, which induces a change of kinetic mechanism. A single mutation in a region of the protein remote from the active site can thus act as a molecular switch to confer cooperativity on an enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scrutton, N S -- Deonarain, M P -- Berry, A -- Perham, R N -- New York, N.Y. -- Science. 1992 Nov 13;258(5085):1140-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Cambridge, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1439821" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Escherichia coli/*enzymology/genetics ; Genes, Bacterial ; Glutathione/metabolism ; Glutathione Reductase/*chemistry/genetics/metabolism ; Glycine/chemistry ; Kinetics ; Macromolecular Substances ; Models, Molecular ; Molecular Sequence Data ; Molecular Structure ; *Mutagenesis, Site-Directed ; NADP/metabolism ; Plasmids ; Protein Multimerization ; Tryptophan/chemistry
    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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  • 6
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    Neural computing in cancer drug development: predicting mechanism of action (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-10-16
    Description: Described here are neural networks capable of predicting a drug's mechanism of action from its pattern of activity against a panel of 60 malignant cell lines in the National Cancer Institute's drug screening program. Given six possible classes of mechanism, the network misses the correct category for only 12 out of 141 agents (8.5 percent), whereas linear discriminant analysis, a standard statistical technique, misses 20 out of 141 (14.2 percent). The success of the neural net indicates several things. (i) The cell line response patterns are rich in information about mechanism. (ii) Appropriately designed neural networks can make effective use of that information. (iii) Trained networks can be used to classify prospectively the more than 10,000 agents per year tested by the screening program. Related networks, in combination with classical statistical tools, will help in a variety of ways to move new anticancer agents through the pipeline from in vitro studies to clinical application.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weinstein, J N -- Kohn, K W -- Grever, M R -- Viswanadhan, V N -- Rubinstein, L V -- Monks, A P -- Scudiero, D A -- Welch, L -- Koutsoukos, A D -- Chiausa, A J -- New York, N.Y. -- Science. 1992 Oct 16;258(5081):447-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Mathematical Biology, National Cancer Institute, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1411538" target="_blank"〉PubMed〈/a〉
    Keywords: Alkylating Agents ; *Antineoplastic Agents/classification ; Databases, Factual ; *Drug Design ; Drug Evaluation, Preclinical ; Growth Inhibitors ; Humans ; In Vitro Techniques ; Neural Networks (Computer) ; Tumor Cells, Cultured/drug effects
    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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  • 7
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    Targets for cell cycle arrest by the immunosuppressant rapamycin in yeast (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-23
    Description: FK506 and rapamycin are related immunosuppressive compounds that block helper T cell activation by interfering with signal transduction. In vitro, both drugs bind and inhibit the FK506-binding protein (FKBP) proline rotamase. Saccharomyces cerevisiae cells treated with rapamycin irreversibly arrested in the G1 phase of the cell cycle. An FKBP-rapamycin complex is concluded to be the toxic agent because (i) strains that lack FKBP proline rotamase, encoded by FPR1, were viable and fully resistant to rapamycin and (ii) FK506 antagonized rapamycin toxicity in vivo. Mutations that conferred rapamycin resistance altered conserved residues in FKBP that are critical for drug binding. Two genes other than FPR1, named TOR1 and TOR2, that participate in rapamycin toxicity were identified. Nonallelic noncomplementation between FPR1, TOR1, and TOR2 alleles suggests that the products of these genes may interact as subunits of a protein complex. Such a complex may mediate nuclear entry of signals required for progression through the cell cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heitman, J -- Movva, N R -- Hall, M N -- New York, N.Y. -- Science. 1991 Aug 23;253(5022):905-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1715094" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Anti-Bacterial Agents/metabolism/pharmacology ; Base Sequence ; Binding Sites ; Carrier Proteins/antagonists & inhibitors/chemistry/genetics/metabolism ; Cell Cycle/*drug effects ; Cyclosporins/pharmacology ; Drug Resistance, Microbial/genetics ; G1 Phase/drug effects ; Humans ; Immunosuppressive Agents/pharmacology ; Molecular Sequence Data ; Molecular Structure ; Mutation ; Polyenes/metabolism/*pharmacology ; Saccharomyces cerevisiae/*cytology/drug effects ; Sequence Homology, Nucleic Acid ; Signal Transduction ; Sirolimus ; Tacrolimus ; Tacrolimus Binding 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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  • 8
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    Pesticide use (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ragsdale, N N -- New York, N.Y. -- Science. 1991 Apr 19;252(5004):358-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2017672" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds ; Fishes ; Food Contamination ; Humans ; Neoplasms/chemically induced ; Pesticides/*poisoning ; United States
    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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  • 9
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    Differential phosphorylation of the transcription factor Oct1 during the cell cycle (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-30
    Description: Orderly progression through the somatic cell division cycle is accompanied by phase-specific transcription of a variety of different genes. During S phase, transcription of mammalian histone H2B genes requires a specific promoter element and its cognate transcription factor Oct1 (OTF1). A possible mechanism for regulating histone H2B transcription during the cell cycle is direct modulation of Oct1 activity by phase-specific posttranslational modifications. Analysis of Oct1 during progression through the cell cycle revealed a complex temporal program of phosphorylation. A p34cdc2-related protein kinase that is active during mitosis may be responsible for one mitotic phosphorylation of Oct1. However, the temporally controlled appearance of Oct1 phosphopeptides suggests the involvement of multiple kinases and phosphatases. These results support the idea that cell cycle-regulated transcription factors may be direct substrates for phase-specific regulatory enzymes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, S B -- Segil, N -- Heintz, N -- GM 13752/GM/NIGMS NIH HHS/ -- GM 32544/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Aug 30;253(5023):1022-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Laboratory of Molecular Biology, Rockefeller University, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1887216" target="_blank"〉PubMed〈/a〉
    Keywords: CDC2 Protein Kinase/metabolism ; *Cell Cycle ; DNA-Binding Proteins/isolation & purification/*metabolism ; HeLa Cells/cytology/physiology ; Histones/genetics ; Host Cell Factor C1 ; Humans ; Mitosis ; Octamer Transcription Factor-1 ; Peptide Mapping ; Phosphopeptides/isolation & purification ; Phosphorylation ; S Phase ; Transcription Factors/isolation & purification/*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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  • 10
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    Malignant transformation by a mutant of the IFN-inducible dsRNA-dependent protein kinase (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-09-18
    Description: The double-stranded RNA-dependent protein kinase (dsRNA-PK) is thought to be a key mediator of the antiviral and antiproliferative effects of interferons (IFNs). Studies examining the physiological function of the kinase suggest that it participates in cell growth and differentiation by regulating protein synthesis. Autophosphorylation and consequent activation of dsRNA-PK in vitro and in vivo result in phosphorylation of the alpha subunit of eukaryotic initiation factor-2 (eIF-2) and inhibition of protein synthesis. Expression of a functionally defective mutant of human dsRNA-PK in NIH 3T3 cells resulted in malignant transformation, suggesting that dsRNA-PK may function as a suppressor of cell proliferation and tumorigenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koromilas, A E -- Roy, S -- Barber, G N -- Katze, M G -- Sonenberg, N -- AI22646/AI/NIAID NIH HHS/ -- RR00166/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1992 Sep 18;257(5077):1685-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Faculty of Medicine, McGill University, Montreal, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1382315" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Binding Sites ; Cell Division ; Cell Line ; *Cell Transformation, Neoplastic ; Cloning, Molecular ; DNA/genetics ; Enzyme Induction ; Gene Expression ; Humans ; Immunoblotting ; Interferons/*pharmacology ; Mice ; Molecular Sequence Data ; *Mutation ; Phosphorylation ; Protein Kinases/chemistry/*genetics/physiology ; Transfection ; eIF-2 Kinase
    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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