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  • Animals  (113)
  • American Association for the Advancement of Science (AAAS)  (113)
  • Nature Publishing Group
  • 1990-1994  (113)
  • 1980-1984
  • 1955-1959
  • 1945-1949
  • 1935-1939
  • 1925-1929
  • 1991  (113)
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  • American Association for the Advancement of Science (AAAS)  (113)
  • Nature Publishing Group
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  • 1990-1994  (113)
  • 1980-1984
  • 1955-1959
  • 1945-1949
  • 1935-1939
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  • 1
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    Human immunodeficiency virus infection of human-PBL-SCID mice (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-02-15
    Description: Severe combined immunodeficient (SCID) mice reconstituted with human peripheral blood leukocytes (hu-PBL-SCID mice) have inducible human immune function and may be useful as a small animal model for acquired immunodeficiency syndrome (AIDS) research. Hu-PBL-SCID mice infected with human immunodeficiency virus-1 (HIV-1) contained virus that was recoverable by culture from the peritoneal cavity, spleen, peripheral blood, and lymph nodes for up to 16 weeks after infection; viral sequences were also detected by in situ hybridization and by amplification with the polymerase chain reaction (PCR). Mice could be infected with multiple strains of HIV-1, including LAV-1/Bru, IIIB, MN, SF2, and SF13. HIV-1 infection affected the concentration of human immunoglobulin and the number of CD4+ T cells in the mice. These results support the use of the hu-PBL-SCID mouse for studies of the pathogenesis and treatment of AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mosier, D E -- Gulizia, R J -- Baird, S M -- Wilson, D B -- Spector, D H -- Spector, S A -- AI-27703/AI/NIAID NIH HHS/ -- AI-29182/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1991 Feb 15;251(4995):791-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Immunology, Medical Biology Institute, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1990441" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Transfusion ; Chimera/*immunology ; *Disease Models, Animal ; *HIV Infections/immunology ; *HIV-1/isolation & purification ; Humans ; Immunologic Deficiency Syndromes/genetics/*immunology ; Lymphocyte Transfusion ; Mice ; Mice, Mutant Strains/*immunology ; Spleen/microbiology
    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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    Genome maps 1991 [wall chart] (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chipperfield, M -- Maidek, M -- Pearson, P -- Ashburner, M -- Glover, D M -- Saunders, R D -- Duncan, I -- Hartl, D -- Merriam, J -- Lee, G -- New York, N.Y. -- Science. 1991 Oct 11;254(5029):247-62.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1925580" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosome Mapping ; Chromosomes ; Drosophila melanogaster/*genetics ; Genes ; *Genome ; *Genome, Human ; Humans
    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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  • 3
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    Movement of neural activity on the superior colliculus motor map during gaze shifts (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-03-15
    Description: The superior colliculus contains neurons that cause displacements of the visual axis (gaze shifts). These cells are arranged topographically in a motor map on which the vector (amplitude and direction) of the coded movement varies continuously with location. How this spatial representation becomes a temporal code (frequency and duration) in the motoneurons is unknown. During a gaze shift, a zone of neural activity moved continuously on the map from an initial location, defining the vector of the desired gaze shift, to a final "zero" position containing neurons that were active during fixation. Thus, the spatial-temporal transformation may be accomplished by control of gaze throughout the spatial trajectory of activity on the motor map.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Munoz, D P -- Pelisson, D -- Guitton, D -- New York, N.Y. -- Science. 1991 Mar 15;251(4999):1358-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2003221" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; *Eye Movements ; Oculomotor Muscles/innervation/physiology ; Superior Colliculi/*physiology ; Visual Perception/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    ACh receptor-rich membrane domains organized in fibroblasts by recombinant 43-kildalton protein (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-02-01
    Description: Neurotransmitter receptors are generally clustered in the postsynaptic membrane. The mechanism of clustering was analyzed with fibroblast cell lines that were stably transfected with the four subunits for fetal (alpha, beta, gamma, delta) or adult (alpha, beta, epsilon, delta) type mouse muscle nicotinic acetylcholine receptors (AChRs). Immunofluorescent staining indicated that AChRs were dispersed on the surface of these cells. When transiently transfected with an expression construct encoding a 43-kilodalton protein that is normally concentrated under the postsynaptic membrane, AChRs expressed in these cells became aggregated in large cell-surface clusters, colocalized with the 43-kilodalton protein. This suggests that 43-kilodalton protein can induce AChR clustering and that cluster induction involves direct contact between AChR and 43-kilodalton protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, W D -- Kopta, C -- Blount, P -- Gardner, P D -- Steinbach, J H -- Merlie, J P -- R01 NS022356/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1991 Feb 1;251(4993):568-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1703661" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/pharmacology ; Animals ; Cell Membrane/physiology ; Fetus ; Fibroblasts/cytology/physiology ; Fluorescent Antibody Technique ; Ion Channels/drug effects/physiology ; Macromolecular Substances ; Mice ; Molecular Weight ; Muscles/physiology ; Receptors, Nicotinic/analysis/genetics/*physiology ; Recombinant Proteins/analysis/metabolism ; Transfection
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Selective activation of the B natriuretic peptide receptor by C-type natriuretic peptide (CNP) (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-05
    Description: The natriuretic peptides are hormones that can stimulate natriuretic, diuretic, and vasorelaxant activity in vivo, presumably through the activation of two known cell surface receptor guanylyl cyclases (ANPR-A and ANPR-B). Although atrial natriuretic peptide (ANP) and, to a lesser extent, brain natriuretic peptide (BNP) are efficient activators of the ANPR-A guanylyl cyclase, neither hormone can significantly stimulate ANPR-B. A member of this hormone family, C-type natriuretic peptide (CNP), potently and selectively activated the human ANPR-B guanylyl cyclase. CNP does not increase guanosine 3',5'-monophosphate accumulation in cells expressing human ANPR-A. The affinity of CNP for ANPR-B is 50- or 500-fold higher than ANP or BNP, respectively. This ligand-receptor pair may be involved in the regulation of fluid homeostasis by the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koller, K J -- Lowe, D G -- Bennett, G L -- Minamino, N -- Kangawa, K -- Matsuo, H -- Goeddel, D V -- New York, N.Y. -- Science. 1991 Apr 5;252(5002):120-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Genentech, Inc., South San Francisco 94080.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1672777" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atrial Natriuretic Factor/*physiology ; Cells, Cultured ; Cercopithecus aethiops ; Cloning, Molecular ; Dose-Response Relationship, Drug ; Guanylate Cyclase/metabolism ; Humans ; Natriuretic Peptide, Brain ; Natriuretic Peptide, C-Type ; Nerve Tissue Proteins/*pharmacology ; Receptors, Atrial Natriuretic Factor ; Receptors, Cell Surface/*physiology ; Recombinant Proteins ; Signal Transduction
    Print ISSN: 0036-8075
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  • 6
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    Expression cDNA cloning of the KGF receptor by creation of a transforming autocrine loop (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-01-04
    Description: An expression cloning strategy was devised to isolate the keratinocyte growth factor (KGF) receptor complementary DNA. NIH/3T3 fibroblasts, which secrete this epithelial cell-specific mitogen, were transfected with a keratinocyte expression complementary DNA library. Among several transformed foci identified, one demonstrated the acquisition of specific high-affinity KGF binding sites. The pattern of binding competition by related fibroblast growth factors (FGFs) indicated that this receptor had high affinity for acidic FGF as well as KGF. The rescued 4.2-kilobase complementary DNA was shown to encode a predicted membrane-spanning tyrosine kinase related to but distinct from the basic FGF receptor. This expression cloning approach may be generally applicable to the isolation of genes that constitute limiting steps in mitogenic signaling pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miki, T -- Fleming, T P -- Bottaro, D P -- Rubin, J S -- Ron, D -- Aaronson, S A -- New York, N.Y. -- Science. 1991 Jan 4;251(4989):72-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cellular and Molecular Biology, National Cancer Institute, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1846048" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding, Competitive ; Cell Line ; *Cloning, Molecular ; DNA/*genetics ; Fibroblast Growth Factor 10 ; Fibroblast Growth Factor 7 ; Fibroblast Growth Factors/metabolism ; Fibroblasts/metabolism ; *Gene Expression ; Growth Substances/metabolism ; Mice ; Molecular Sequence Data ; Nucleic Acid Hybridization ; Plasmids ; Receptor, Fibroblast Growth Factor, Type 2 ; Receptors, Cell Surface/*genetics/metabolism ; *Receptors, Fibroblast Growth Factor ; Recombinant Proteins/metabolism ; Transfection ; Transformation, Genetic
    Print ISSN: 0036-8075
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  • 7
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    Antibody-mediated clearance of alphavirus infection from neurons (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-11-08
    Description: Humoral immunity is important for protection against viral infection and neutralization of extracellular virus, but clearance of virus from infected tissues is thought to be mediated solely by cellular immunity. However, in a SCID mouse model of persistent alphavirus encephalomyelitis, adoptive transfer of hyperimmune serum resulted in clearance of infectious virus and viral RNA from the nervous system, whereas adoptive transfer of sensitized T lymphocytes had no effect on viral replication. Three monoclonal antibodies to two different epitopes on the E2 envelope glycoprotein mediated viral clearance. Treatment of alphavirus-infected primary cultured rat neurons with these monoclonal antibodies to E2 resulted in decreased viral protein synthesis, followed by gradual termination of mature infectious virion production. Thus, antibody can mediate clearance of alphavirus infection from neurons by restricting viral gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, B -- Hardwick, J M -- Trapp, B D -- Crawford, T O -- Bollinger, R C -- Griffin, D E -- NS29234/NS/NINDS NIH HHS/ -- T32-NS-07000/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1991 Nov 8;254(5033):856-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1658936" target="_blank"〉PubMed〈/a〉
    Keywords: Alphavirus/immunology/isolation & purification/*physiology ; Animals ; Antibodies, Monoclonal/*therapeutic use ; Central Nervous System/immunology/*microbiology ; Encephalomyelitis/*immunology/microbiology/therapy ; *Immunotherapy, Adoptive ; Mice ; Mice, Inbred Strains ; Mice, SCID ; Neurons/immunology/*microbiology ; RNA, Viral/isolation & purification ; T-Lymphocytes/*immunology ; Togaviridae Infections/*immunology/therapy ; Virus Replication
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Chloride conductance expressed by delta F508 and other mutant CFTRs in Xenopus oocytes (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: The cystic fibrosis transmembrane conductance regulator (CFTR) is associated with expression of a chloride conductance that is defective in cystic fibrosis (CF). Xenopus oocytes injected with RNA coding for CFTR that contained mutations in the first nucleotide binding fold (NBF1) expressed chloride currents in response to raising adenosine 3',5'-monophosphate (cAMP) with forskolin and 3-isobutyl-1-methylxanthine (IBMX). The mutant CFTRs were less sensitive than wild-type CFTR to this activating stimulus, and the reduction in sensitivity correlated with the severity of cystic fibrosis in patients carrying the corresponding mutations. This demonstration provides the basis for detailed analyses of NBF1 function and suggests potential pharmacologic treatments for cystic fibrosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Drumm, M L -- Wilkinson, D J -- Smit, L S -- Worrell, R T -- Strong, T V -- Frizzell, R A -- Dawson, D C -- Collins, F S -- DK29786/DK/NIDDK NIH HHS/ -- DK39690/DK/NIDDK NIH HHS/ -- DK42718/DK/NIDDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1797-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, University of Michigan, Ann Arbor 48109.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1722350" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-3-isobutylxanthine/pharmacology ; Animals ; Chloride Channels ; Chlorides/*metabolism ; Cystic Fibrosis/genetics/physiopathology ; Cystic Fibrosis Transmembrane Conductance Regulator ; Genetic Variation ; Genotype ; Humans ; Ion Channels/physiology ; Membrane Potentials/drug effects ; Membrane Proteins/drug effects/genetics/*physiology ; Microinjections ; *Mutation ; Oocytes/drug effects/*physiology ; RNA/administration & dosage/genetics ; Transcription, Genetic ; Xenopus
    Print ISSN: 0036-8075
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  • 9
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    The trk proto-oncogene product: a signal transducing receptor for nerve growth factor (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-26
    Description: The trk proto-oncogene encodes a 140-kilodalton, membrane-spanning protein tyrosine kinase (p140prototrk) that is expressed only in neural tissues. Nerve growth factor (NGF) stimulates phosphorylation of p140prototrk in neural cell lines and in embryonic dorsal root ganglia. Affinity cross-linking and equilibrium binding experiments with 125I-labeled NGF indicate that p140prototrk binds NGF specifically in cultured cells with a dissociation constant of 10(-9) molar. The identification of p140prototrk as an NGF receptor indicates that this protein participates in the primary signal transduction mechanism of NGF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaplan, D R -- Hempstead, B L -- Martin-Zanca, D -- Chao, M V -- Parada, L F -- N01-CO-74101/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 Apr 26;252(5005):554-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Eukaryotic Signal Transduction Group, National Cancer Institute-Frederick Cancer Research and Development Center, MD 21702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1850549" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Membrane/physiology ; Cross-Linking Reagents ; Embryo, Mammalian ; Ganglia, Spinal/*metabolism ; Humans ; Kinetics ; Mice ; Nerve Growth Factors/metabolism/*physiology ; Neuroblastoma ; Protein-Tyrosine Kinases/*metabolism ; Proto-Oncogene Proteins/*metabolism ; *Proto-Oncogenes ; Receptor, trkA ; Receptors, Cell Surface/metabolism/*physiology ; Receptors, Nerve Growth Factor ; *Signal Transduction
    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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    Induction by NGF of meiotic maturation of Xenopus oocytes expressing the trk proto-oncogene product (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-26
    Description: The effect of nerve growth factor (NGF) was assessed in Xenopus oocytes expressing the human trk proto-oncogene product, p140prototrk. Oocytes injected with trk messenger RNA expressed polypeptides recognized by antibodies to the trk gene product. Exposure of these oocytes to nanomolar amounts of NGF resulted in specific surface binding of 125I-labeled NGF, tyrosine phosphorylation of p140prototrk, and meiotic maturation, as determined by germinal vesicle breakdown and maturation promoting factor (p34cdc2) kinase activation. Thus the trk proto-oncogene product can act as a receptor for NGF in a functionally productive manner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nebreda, A R -- Martin-Zanca, D -- Kaplan, D R -- Parada, L F -- Santos, E -- New York, N.Y. -- Science. 1991 Apr 26;252(5005):558-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1850550" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Enzyme Activation ; Female ; Humans ; In Vitro Techniques ; Kinetics ; Meiosis/*drug effects ; Microinjections ; Nerve Growth Factors/metabolism/*pharmacology ; Oocytes/cytology/drug effects/*physiology ; Progesterone/pharmacology ; Protein-Tyrosine Kinases/genetics ; Proto-Oncogene Proteins/*genetics/metabolism ; *Proto-Oncogenes ; RNA, Messenger/administration & dosage/genetics ; Receptor, trkA ; Receptors, Cell Surface/drug effects/metabolism ; Receptors, Nerve Growth Factor ; Xenopus laevis
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