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  • Articles  (102)
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  • In Vitro Techniques
  • American Association for the Advancement of Science (AAAS)  (101)
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  • Articles  (102)
  • Other Sources
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  • American Association for the Advancement of Science (AAAS)  (101)
  • Nature Publishing Group (NPG)  (1)
  • American Chemical Society (ACS)
  • Oxford University Press
  • Springer
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  • 2015-2019  (1)
  • 2005-2009  (2)
  • 1990-1994  (62)
  • 1980-1984  (37)
Year
Journal
Topic
  • 1
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    Mediation of responses to calcium in taste cells by modulation of a potassium conductance (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-05
    Description: Calcium salts are strong taste stimuli in vertebrate animals. However, the chemosensory transduction mechanisms for calcium are not known. In taste buds of Necturus maculosus (mud puppy), calcium evokes depolarizing receptor potentials by acting extracellularly on the apical ends of taste cells to block a resting potassium conductance. Therefore, divalent cations elicit receptor potentials in taste cells by modulating a potassium conductance rather than by permeating the cell membrane, the mechanism utilized by monovalent cations such as sodium and potassium ions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bigiani, A R -- Roper, S D -- 2 POI NS 20486/NS/NINDS NIH HHS/ -- 2 RO1 NS24107/NS/NINDS NIH HHS/ -- 5 RO1 AG06557/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1991 Apr 5;252(5002):126-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Neurobiology, Colorado State University, Fort Collins 80523.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2011748" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cadmium/pharmacology ; Calcium/*physiology ; Electric Conductivity ; In Vitro Techniques ; Membrane Potentials ; Necturus ; Potassium/*physiology ; Potassium Channels/*physiology ; Taste/*physiology ; Tetraethylammonium Compounds/pharmacology ; Tongue/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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  • 2
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    Receptor-induced conformation change of the immunosuppressant cyclosporin A (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-11-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wuthrich, K -- von Freyberg, B -- Weber, C -- Wider, G -- Traber, R -- Widmer, H -- Braun, W -- New York, N.Y. -- Science. 1991 Nov 15;254(5034):953-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Molekularbiologie und Biophysik, Eidgenossische Technische Hochschule-Honggerberg, Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1948082" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Isomerases/*ultrastructure ; Carrier Proteins/*ultrastructure ; *Cyclosporine/chemistry ; Hydrogen Bonding ; In Vitro Techniques ; Ligands ; Magnetic Resonance Spectroscopy ; Molecular Conformation ; Molecular Structure ; Peptidylprolyl Isomerase ; Protein Binding
    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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    Lysyl oxidase and rrg messenger RNA (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-08-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kenyon, K -- Contente, S -- Trackman, P C -- Tang, J -- Kagan, H M -- Friedman, R M -- P01 HL13262/HL/NHLBI NIH HHS/ -- R01 CA37351-04A1/CA/NCI NIH HHS/ -- R37 AR18880/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Aug 16;253(5021):802.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1678898" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blotting, Northern ; Cell Line ; *Cell Transformation, Neoplastic ; Gene Expression ; *Genes, Tumor Suppressor ; In Vitro Techniques ; Mice ; Protein-Lysine 6-Oxidase/*physiology ; RNA, Messenger/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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  • 4
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    Function of the homeodomain protein GHF1 in pituitary cell proliferation (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-12
    Description: Mutations that cause pituitary dwarfism in the mouse reside in the gene encoding the transcription factor growth hormone factor 1 (GHF1 or pit1). These dwarf mice (dw and dwJ) are deficient in growth hormone (GH) and prolactin (PRL) synthesis and exhibit pituitary hypoplasia, suggesting a stem cell defect. With antisense oligonucleotide technology, a cell culture model of this genetic defect was developed. Specific inhibition of GHF1 synthesis by complementary oligonucleotides led to a marked decrease in GH and PRL expression and to a marked decrease in proliferation of somatotrophic cell lines. These results provide direct evidence that the homeodomain protein GHF1 is required not only for the establishment and maintenance of the differentiated phenotype but for cell proliferation as well.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Castrillo, J L -- Theill, L E -- Karin, M -- DK38527/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 12;253(5016):197-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1677216" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antisense Elements (Genetics) ; Base Sequence ; *Cell Division ; Cells, Cultured ; DNA/biosynthesis ; DNA-Binding Proteins/*physiology ; Dwarfism/genetics ; Gene Expression Regulation ; *Genes, Homeobox ; Growth Hormone/genetics ; In Vitro Techniques ; Mice ; Molecular Sequence Data ; Pituitary Gland/*cytology/physiology ; Prolactin/genetics ; Transcription Factor Pit-1 ; Transcription Factors/*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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  • 5
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    Recognition of self antigens by skin-derived T cells with invariant gamma delta antigen receptors (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-07
    Description: Thy-1+ dendritic epidermal T cells (dECs) express invariant gamma delta antigen receptors and are found in intimate contact with keratinocytes in murine epidermis--thus raising the possibility that keratinocytes express a ligand for the antigen receptor of these T cells. Thy-1+ dECs were stimulated to produce lymphokines by interaction with keratinocytes in vitro. This stimulation was mediated through the dEC antigen receptor and did not appear to be restricted by the major histocompatibility complex. Thus, dECs can recognize self antigens and may participate in immune surveillance for cellular damage rather than for foreign antigens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Havran, W L -- Chien, Y H -- Allison, J P -- AI26942/AI/NIAID NIH HHS/ -- CA40041/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 Jun 7;252(5011):1430-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1828619" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoantigens/*immunology ; Cell Line ; Dendrites/immunology ; Epidermis ; *Immunity, Cellular ; In Vitro Techniques ; Interleukin-2/secretion ; Keratinocytes/physiology ; Mice ; Mice, Inbred BALB C ; Receptors, Antigen, T-Cell/*physiology ; Receptors, Antigen, T-Cell, gamma-delta ; T-Lymphocytes/*immunology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Excitatory synaptic responses mediated by GABAA receptors in the hippocampus (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-09-20
    Description: Gamma-aminobutyric acid (GABA) is a major inhibitory neurotransmitter in the cortex. Activation of postsynaptic GABAA receptors hyperpolarizes cells and inhibits neuronal activity. Synaptic responses mediated by GABAA receptors also strongly excited hippocampal neurons. This excitatory response was recorded in morphologically identified interneurons in the presence of 4-aminopyridine or after elevation of extracellular potassium concentrations. The synaptic excitation sustained by GABAA receptors synchronized the activity of inhibitory interneurons. This synchronized discharge of interneurons in turn elicited large-amplitude inhibitory postsynaptic potentials in pyramidal and granule cells. Excitatory synaptic responses mediated by GABAA receptors may thus provide a mechanism for the recruitment of GABAergic interneurons through their recurrent connections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Michelson, H B -- Wong, R K -- New York, N.Y. -- Science. 1991 Sep 20;253(5026):1420-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, State University of New York, Brooklyn 11203.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1654594" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Aminopyridine/pharmacology ; Animals ; Atropine/*pharmacology ; Evoked Potentials/drug effects ; Guinea Pigs ; Hippocampus/*physiology ; In Vitro Techniques ; Membrane Potentials/drug effects ; Neurons/drug effects/*physiology ; Propranolol/*pharmacology ; Receptors, GABA-A/drug effects/*physiology ; Synapses/drug effects/*physiology
    Print ISSN: 0036-8075
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  • 7
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    Stereospecific effects of inhalational general anesthetic optical isomers on nerve ion channels (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-10-18
    Description: Although it is generally agreed that general anesthetics ultimately act on neuronal ion channels, there is considerable controversy over whether this occurs by direct binding to protein or secondarily by nonspecific perturbation of lipids. Very pure optical isomers of the inhalational general anesthetic isoflurane exhibited clear stereoselectivity in their effects on particularly sensitive ion channels in identified molluscan central nervous system neurons. At the human median effect dose (ED50) for general anesthesia, the (+)-isomer was about twofold more effective than the (-)-isomer both in eliciting the anesthetic-activated potassium current IK(An) and in inhibiting a current mediated by neuronal nicotinic acetylcholine receptors. For inhibiting the much less sensitive transient potassium current IA, the (-)-isomer was marginally more potent than the (+)-isomer. Both isomers were equally effective at disrupting lipid bilayers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Franks, N P -- Lieb, W R -- GM 41609/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Oct 18;254(5030):427-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Blackett Laboratory, Imperial College of Science, Technology & Medicine, London, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1925602" target="_blank"〉PubMed〈/a〉
    Keywords: Anesthesia, Inhalation ; Anesthetics, Dissociative ; Animals ; In Vitro Techniques ; Isoflurane/*pharmacology ; Lipid Bilayers/chemistry ; Lymnaea ; Neurons/*drug effects/metabolism ; Potassium Channels/*drug effects ; Receptors, Nicotinic/drug effects ; Stereoisomerism ; Thermodynamics
    Print ISSN: 0036-8075
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  • 8
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    Requirement of heparan sulfate for bFGF-mediated fibroblast growth and myoblast differentiation (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-21
    Description: Basic fibroblast growth factor (bFGF) binds to heparan sulfate proteoglycans at the cell surface and to receptors with tyrosine kinase activity. Prevention of binding between cell surface heparan sulfate and bFGF (i) substantially reduces binding of fibroblast growth factor to its cell-surface receptors, (ii) blocks the ability of bFGF to support the growth of Swiss 3T3 fibroblasts, and (iii) induces terminal differentiation of MM14 skeletal muscle cells, which is normally repressed by fibroblast growth factor. These results indicate that cell surface heparan sulfate is directly involved in bFGF cell signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rapraeger, A C -- Krufka, A -- Olwin, B B -- 5T32H007118/PHS HHS/ -- AR39467/AR/NIAMS NIH HHS/ -- HD21881/HD/NICHD NIH HHS/ -- R01 AR039467/AR/NIAMS NIH HHS/ -- R01 HD021881/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1991 Jun 21;252(5013):1705-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of Wisconsin, Madison 53706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1646484" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Division ; Cell Line ; Chlorates/pharmacology ; Fibroblast Growth Factor 2/*metabolism ; Fibroblasts/*cytology ; Heparitin Sulfate/*physiology ; In Vitro Techniques ; Mice ; Muscles/*cytology ; Polysaccharide-Lyases/pharmacology ; Protein Binding ; Receptors, Cell Surface/metabolism ; Structure-Activity Relationship
    Print ISSN: 0036-8075
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  • 9
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    Demonstration that CFTR is a chloride channel by alteration of its anion selectivity (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-12
    Description: Expression of the cystic fibrosis transmembrane conductance regulator (CFTR) generates adenosine 3',5'-monophosphate (cAMP)-regulated chloride channels, indicating that CFTR is either a chloride channel or a chloride channel regulator. To distinguish between these possibilities, basic amino acids in the putative transmembrane domains were mutated. The sequence of anion selectivity of cAMP-regulated channels in cells containing either endogenous or recombinant CFTR was bromide greater than chloride greater than iodide greater than fluoride. Mutation of the lysines at positions 95 or 335 to acidic amino acids converted the selectivity sequence to iodide greater than bromide greater than chloride greater than fluoride. These data indicate that CFTR is a cAMP-regulated chloride channel and that lysines 95 and 335 determine anion selectivity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, M P -- Gregory, R J -- Thompson, S -- Souza, D W -- Paul, S -- Mulligan, R C -- Smith, A E -- Welsh, M J -- New York, N.Y. -- Science. 1991 Jul 12;253(5016):202-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Internal Medicine, University of Iowa College of Medicine, Iowa City 52242.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1712984" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Chloride Channels ; Chlorides/*physiology ; Cyclic AMP/physiology ; Cystic Fibrosis/physiopathology ; Cystic Fibrosis Transmembrane Conductance Regulator ; DNA Mutational Analysis ; Electric Conductivity ; HeLa Cells ; Humans ; In Vitro Techniques ; Ion Channels/genetics/*physiology ; Membrane Glycoproteins/genetics/physiology ; Membrane Potentials ; Membrane Proteins/genetics/*physiology ; Molecular Sequence Data ; 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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  • 10
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    Requirement of nuclear prolactin for interleukin-2--stimulated proliferation of T lymphocytes (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-07-05
    Description: Prolactin (PRL) is necessary for the proliferation of cloned T lymphocytes in response to interleukin-2 (IL-2). Translocation of PRL into the nucleus occurs during IL-2--stimulated mitogenesis. Therefore, the function of intranuclear PRL in T cell proliferation was tested. Eukaryotic expression vectors were prepared to express wild-type PRL [PRL(WT)], PRL that lacks the signal sequence for translocation into the endoplasmic reticulum [PRL(ER-)], and chimeric PRL in which the signal peptide was replaced with the sequence that directs the nuclear translocation of the SV40 large T antigen [PRL(NT+)]. Expression of these constructs in a T cell line (Nb2) responsive to PRL and IL-2 resulted in localization of PRL in the extracellular milieu, cytoplasm, or nucleus, respectively. Stimulation with IL-2 alone resulted in a five- to tenfold increase in the incorporation of [3H]thymidine by cells expressing PRL(NT+) or PRL(WT) as compared to PRL(ER-) or the parental Nb2 cells. Only the PRL(NT+) clone proliferated continuously with IL-2 stimulation in the presence of antiserum to PRL. These results demonstrate that nuclear PRL is necessary for IL-2--stimulated proliferation and suggest that a peptide hormone can function in the nucleus without binding to its cell surface receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clevenger, C V -- Altmann, S W -- Prystowsky, M B -- GM-13901/GM/NIGMS NIH HHS/ -- GM-36962/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Jul 5;253(5015):77-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia 19104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2063207" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Transport, Active ; Cell Cycle/drug effects ; Cell Nucleus/metabolism ; Drug Synergism ; Genetic Vectors ; In Vitro Techniques ; Interleukin-2/pharmacology ; Lymphocyte Activation/*drug effects ; Molecular Sequence Data ; Prolactin/pharmacokinetics/*pharmacology ; Rats ; Transfection
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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