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  • Kinetics  (34)
  • Disease Models, Animal  (20)
  • Genes
  • American Association for the Advancement of Science (AAAS)  (66)
  • Annual Reviews
  • 1980-1984  (66)
  • 1955-1959
  • 1930-1934
  • 1981  (66)
Collection
Keywords
Publisher
Years
  • 1980-1984  (66)
  • 1955-1959
  • 1930-1934
Year
  • 1
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    The major histocompatibility complex in man (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dausset, J -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1469-74.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6792704" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Surface/genetics ; Forecasting ; Genes ; Genes, MHC Class II ; Genetic Linkage ; HLA Antigens/genetics ; Humans ; Immune Tolerance ; Immunity, Cellular ; *Major Histocompatibility Complex ; Polymorphism, Genetic ; Transplantation 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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  • 2
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    Benzodiazepine inhibition of the calcium-calmodulin protein kinase system in brain membrane (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: Benzodiazepines inhibit Ca2+-calmodulin-stimulated membrane protein phosphorylation. The effects of the benzodiazepines on protein phosphorylation are stereospecific and produced by membrane-bound benzodiazepine. The potency of benzodiazepine kinase inhibition is correlated with the ability of the benzodiazepines to inhibit electric shock-induced convulsions. These findings provide evidence that some of the anticonvulsant and neuronal stabilizing effects of benzodiazepines may be modulated by the Ca2+-calmodulin protein kinase system and indicate that this calmodulin-kinase system represents an identifiable benzodiazepine receptor in brain that is distinquishable by several criteria from the previously described high affinity benzodiazepine receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeLorenzo, R J -- Burdette, S -- Holderness, J -- NS 1352/NS/NINDS NIH HHS/ -- NSI-EA-1-K04-NS245/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):546-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264605" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzodiazepines/metabolism ; Brain/*enzymology ; Calcium/*pharmacology ; Calcium-Binding Proteins/*pharmacology ; Calmodulin/*pharmacology ; Cell Membrane/enzymology ; Chlordiazepoxide/*pharmacology ; Diazepam/*pharmacology ; Enzyme Activation ; Kinetics ; Molecular Weight ; Phosphorylation ; Protein Kinases/*metabolism ; Rats ; Receptors, Drug/metabolism ; Receptors, GABA-A
    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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  • 3
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    Phenytoin-induced teratogenesis: a mouse model (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-30
    Description: Malformations associated with the fetal hydantoin syndrome have been reproduced in a mouse model. The occurrence of these defects was correlated with maternal serum concentrations, but not with maternal or fetal genotype or the presence of a seizure disorder.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finnell, R H -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):483-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455686" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Disease Models, Animal ; Epilepsy/drug therapy ; Female ; Mice ; Mice, Neurologic Mutants/physiology ; Phenytoin/*adverse effects ; *Teratogens
    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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    Isolation of biological materials by use of erbium (III)--induced magnetic susceptibilities (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Evans, C H -- Tew, W P -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):653-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256262" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Cations ; *Erbium ; Kinetics ; *Magnetics
    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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    Vagotomy abolishes cues of satiety produced by gastric distension (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gonzalez, M F -- Deutsch, J A -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1283-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Feeding Behavior ; Kinetics ; Male ; Rats ; *Satiation ; *Satiety Response ; Stomach/*physiology ; *Vagotomy
    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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    Plasmid-assisted molecular breeding: new technique for enhanced biodegradation of persistent toxic chemicals (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-04
    Description: The persistence of synthetic herbicides such as 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) and its release in massive amounts as a herbicide (Agent Orange) have created toxicological problems in many countries. In nature, 2,4,5-T is slowly degraded by cooxidation and is not utilized as a sole source of carbon and energy. The technique of plasmid-assisted molecular breeding has led to the development of bacterial strains capable of totally degrading 2,4,5-T by using it as their sole source of carbon at high concentrations (greater than 1 mg/ml). Spectrophotometry and gas chromatography reveal various intermediates during growth of the culture with 2,4,5-T.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kellogg, S T -- Chatterjee, D K -- Chakrabarty, A M -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1133-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302584" target="_blank"〉PubMed〈/a〉
    Keywords: 2,4,5-Trichlorophenoxyacetic Acid/*metabolism ; Bacteria/*genetics/metabolism ; Biotransformation ; Cell Division ; Kinetics ; Nucleic Acid Hybridization ; *Plasmids
    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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    Do jumping genes make evolutionary leaps? (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):634-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256261" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; DNA/*genetics ; Genes ; Recombination, Genetic
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  • 8
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    Divalent cation ionophores stimulate resorption and inhibit DNA synthesis in cultured fetal rat bone (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-05
    Description: Two divalent cation ionophores, A23187 and Ionomycin, which are selective for calcium, stimulated the resorption of fetal rat long bones in organ culture at 0.1 to 1 micromolar but not at higher concentrations. Both agents inhibited DNA synthesis at concentrations that stimulated resorption. These results might explain the differences in ionophore effects on bone previously reported, and they imply that cell replication is not required for osteoclast formation in fetal rat long bone cultures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lorenzo, J A -- Raisz, L G -- AM 07290/AM/NIADDK NIH HHS/ -- AM 18063/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1157-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785885" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/*pharmacology ; Bone Resorption/*drug effects ; Bone and Bones/drug effects/*metabolism ; Calcimycin/*pharmacology ; Calcium/metabolism ; Calcium Radioisotopes ; Cells, Cultured ; DNA/*biosynthesis ; DNA Replication/*drug effects ; Ethers/pharmacology ; Fetus ; Ionomycin ; Ionophores/pharmacology ; Kinetics ; Mice ; Parathyroid Hormone/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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  • 9
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    The AF64a-treated mouse: possible model for central cholinergic hypofunction (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: A loss in the number of functional, sodium ion-dependent, high-affinity choline transport sites was observed in the cortex and hippocampus of mice given an intracerebroventricular injection of 65 nanomoles of AF64A (ethylcholine mustard aziridinium ion) 3 days earlier. Such an effect was not observed in the striatum. This effect of AF64A represents a long-term neurochemical deficit at cholinergic nerve terminals in some brain regions which can lead to a persistent deficiency in central cholinergic transmission. The AF64A-treated animal may thus be a model for certain psychiatric or neurological disorders that appear to involve central cholinergic hypofunction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mantione, C R -- Fisher, A -- Hanin, I -- MH 26320/MH/NIMH NIH HHS/ -- MH/AG 34893/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):579-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6894649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aziridines/*pharmacology ; Azirines/*pharmacology ; Biological Transport/drug effects ; Brain/drug effects/*metabolism ; Cerebral Cortex/metabolism ; Choline/*analogs & derivatives/*metabolism/pharmacology ; Corpus Striatum/metabolism ; Hippocampus/metabolism ; Kinetics ; Mice ; Sodium/pharmacology ; Synaptosomes/drug effects/*metabolism
    Print ISSN: 0036-8075
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  • 10
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    Changes in DNA during meiosis in a repair-deficient mutant (rad 52) of yeast (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-01
    Description: The kinetic patterns of DNA synthesis in wild-type (RAD+) and rad 52 mutants of yeast, which exhibit high levels of synchrony during meiosis, are comparable. However, RAD 52 mutants accumulate single-strand breaks in parental DNA during the DNA synthesis period. Thus, the product of the RAD 52 gene has a role in meiotic DNA metabolism, as well as in the repair of DNA damage during mitotic growth. The observed breaks may be unresolved recombination intermediates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Resnick, M A -- Kasimos, J N -- Game, J C -- Braun, R J -- Roth, R M -- 5 R01 GM17317-11/GM/NIGMS NIH HHS/ -- S07-RR07027/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 May 1;212(4494):543-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010606" target="_blank"〉PubMed〈/a〉
    Keywords: *DNA Repair ; DNA, Fungal/genetics ; DNA, Single-Stranded/genetics ; Genes ; *Meiosis ; Molecular Weight ; Mutation ; *Recombination, Genetic ; Saccharomyces cerevisiae/*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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  • 11
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    Early removal of one eye reduces normally occurring cell death in the remaining eye (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: During normal development of the hamster eye, there is a substantial loss of cells from the retinal ganglion cell layer in the first two postnatal weeks. If one eye is lost at birth, this cell death is reduced in the remaining eye. This may account for the increased ipsilateral projection from this eye to the thalamus and midbrain observed in these animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sengelaub, D R -- Finlay, B L -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):573-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244655" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Cell Survival ; Cricetinae ; Kinetics ; Neurons/*physiology ; Rats ; Retina/cytology/*physiology
    Print ISSN: 0036-8075
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  • 12
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    Functional restoration of vision in the cat after long-term monocular deprivation (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-04
    Description: Recovery of visual acuity was studied in six long-term monocularly deprived cats after removal of the nondeprived eye or reverse lid suture. Although both manipulations improved visual acuity, removal of the nondeprived eye was associated with more rapid recovery and higher find acuity than in reverse suture. These results are in agreement with the known electrophysiological effects of these recovery conditions and are also similar to the effects of reverse occlusion or loss of the nonamblyopic eye in human amblyopes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, D C -- EYO 7005/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1137-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268422" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Amblyopia/physiopathology ; Animals ; Cats ; Disease Models, Animal ; Form Perception/physiology ; Visual Acuity ; Visual Cortex/growth & development/*physiology ; Visual Perception/*physiology
    Print ISSN: 0036-8075
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  • 13
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    Bee venom enhances guanylate cyclase activity (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-17
    Description: Bee venom and phospholipase A2 extracted from bee venom enhanced guanylate cyclase (E.C. 4.6.1.2) activity two- to threefold in rat liver, lung, heart, kidney, ileum, and cerebellum. Dose-response relationships revealed that bee venom at concentrations as low as 1 microgram per milliliter and phospholipase A2 at 1 microunit per milliliter caused a maximal enhancement of guanylate cyclase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vesely, D L -- New York, N.Y. -- Science. 1981 Jul 17;213(4505):359-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6113689" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bee Venoms/*pharmacology ; Dose-Response Relationship, Drug ; Enzyme Activation ; Guanylate Cyclase/*metabolism ; Kinetics ; Organ Specificity ; Phospholipases/*pharmacology ; Phospholipases A/*pharmacology ; Phospholipases A2 ; Rats
    Print ISSN: 0036-8075
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  • 14
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    Biopterin cofactor biosynthesis: independent regulation of GTP cyclohydrolase in adrenal medulla and cortex (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-17
    Description: Guanosine triphosphate cyclohydrolase, the enzyme that is apparently rate-limiting in biopterin biosynthesis, is increased in adrenal cortex and medulla of rats treated with insulin or reserpine. Denervation and hypophysectomy block the increase in medullary and cortical enzyme activity, respectively, whereas cycloheximide presents the increase in both tissues. These results provide evidence for induction and regulation of guanosine triphosphate cyclohydrolase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Viveros, O H -- Lee, C L -- Abou-Donia, M M -- Nixon, J C -- Nichol, C A -- New York, N.Y. -- Science. 1981 Jul 17;213(4505):349-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017928" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/drug effects/*enzymology ; Adrenal Glands/innervation ; Adrenal Medulla/drug effects/*enzymology ; Aminohydrolases/*metabolism ; Animals ; Biopterin/*biosynthesis ; Cycloheximide/pharmacology ; Denervation ; GTP Cyclohydrolase/*metabolism ; Hypophysectomy ; Insulin/pharmacology ; Kinetics ; Male ; Organ Specificity ; Pteridines/*biosynthesis ; Rats ; Reserpine/pharmacology
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  • 15
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    Carcinogen testing: current problems and new approaches (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-23
    Description: The classic procedures for testing potential carcinogens in animals have basically not changed in the past 50 years. Considerable knowledge of the mechanisms of carcinogenesis has accrued in the last 20 years, particularly concepts on the metabolic activation of chemicals to reactive electrophilic compounds that can interact with nucleophilic including DNA. These developments, in turn, have yielded a framework for integrating into carcinogen testing the determination of genetic effects of chemicals. A systematic decision point approach to carcinogen testing has been developed which entails a sequential decision-making process as specific tests are performed and evaluated prior to initiation of higher order, more complex tests. Compared to conventional bioassays in rodents, this approach provides knowledge based on mechanisms of carcinogenesis, yields a substantial amount of data at minimal cost, and forms a solid base for eventual heath risk assessment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weisburger, J H -- Williams, G M -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):401-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Assay ; *Carcinogens ; Disease Models, Animal ; *Drug Evaluation, Preclinical ; Mutagenicity Tests ; Mutagens ; Neoplasms, Experimental/*etiology ; Research Design
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  • 16
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    Receptor for albumin on the liver cell surface may mediate uptake of fatty acids and other albumin-bound substances (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-06
    Description: Kinetic analysis of the uptake of carbon-14-labeled oleate in a single-pass perfusion of rat liver and saturable and specific binding of iodine-125-labeled albumin to hepatocytes in suspension suggest the existence of a receptor for albumin on the liver cell surface. The putative receptor appears to mediate uptake of albumin-bound fatty acids by the cell and may account for the efficient hepatic extraction of many other substances tightly bound to albumin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weisiger, R -- Gollan, J -- Ockner, R -- AM-07007/AM/NIADDK NIH HHS/ -- AM-13328/AM/NIADDK NIH HHS/ -- AM-21899/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1048-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6258226" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Fatty Acids/*metabolism ; Female ; Kinetics ; Liver/*metabolism ; Oleic Acids/metabolism ; Protein Binding ; Rats ; Receptors, Albumin ; Receptors, Cell Surface/*metabolism ; Serum Albumin/*metabolism
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  • 17
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    Two classes of single-stranded regions in DNA from sea urchin embryos (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-06
    Description: Native DNA from sea urchin embryos contains single-stranded regions (gaps) of up to 3000 nucleotides. The longer gaps (more than 1400 nucleotides) are nonrandomly distributed and are rich in histone gene sequences, other moderately repetitive sequences, and polypyrimidines. The shorter gaps are associated with DNA replication. A method for isolation of the two classes of single-stranded DNA pieces is reported.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wortzman, M S -- Baker, R F -- New York, N.Y. -- Science. 1981 Feb 6;211(4482):588-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455698" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; *DNA Replication ; DNA, Single-Stranded/*analysis/genetics ; Genes ; Histones/*genetics ; Recombination, Genetic ; Sea Urchins/*genetics
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  • 18
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    Nalidixic acid, oxolinic acid, and novobiocin inhibit yeast glycyl- and leucyl-transfer RNA synthetases (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-24
    Description: Nalidixic acid and novobiocin inhibit the aminoacylation and pyrophosphate exchange activities of glycyl- and leucyl-transfer RNA synthetases from bakers' yeast. Similar types of inhibition are observed for both enzymes, suggesting similar mechanisms. The potency of these inhibitors is comparable to that observed for their inhibition of in vivo DNA synthesis in eukaryotic cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wright, H T -- Nurse, K C -- Goldstein, D J -- GM 07654/GM/NIGMS NIH HHS/ -- GM 23598/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):455-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017932" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acyl-tRNA Synthetases/*antagonists & inhibitors ; Glycine-tRNA Ligase/*antagonists & inhibitors ; Kinetics ; Leucine-tRNA Ligase/*antagonists & inhibitors ; Nalidixic Acid/*pharmacology ; Novobiocin/*pharmacology ; Oxolinic Acid/*pharmacology ; Saccharomyces cerevisiae/*enzymology
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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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    Mesenchymal cells from the human embryonic palate are highly responsive to epidermal growth factor (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: An established line of mesenchymal cells from the human embryonic palate is highly sensitive to the stimulatory effect of epidermal growth factor on growth, labeled thymidine incorporation, and ornithine decarboxylase activity. The results suggest that epidermal growth factor may play a key role in development of various human embryonic and fetal tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoneda, T -- Pratt, R M -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):563-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017936" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division/drug effects ; Cell Line ; DNA Replication/drug effects ; Embryo, Mammalian ; Epidermal Growth Factor/*pharmacology ; Female ; Humans ; Insulin/pharmacology ; Kinetics ; Organ Specificity ; Ornithine Decarboxylase/metabolism ; Palate/drug effects/*physiology ; Peptides/*pharmacology ; Pregnancy
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  • 20
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    Drug discrimination learning in lead-exposed rats (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-01
    Description: Lead acetate (0.02 or 0.5 percent) was administered to dams throughout the lactation period with half of the litters continuing on lead after weaning. Drug thresholds for d-amphetamine were determined by using the drug-discrimination learning paradigm. All the offspring that had been exposed to lead were less sensitive to the stimulus properties of d-amphetamine irrespective of whether or not they had continued on lead after weaning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zenick, H -- Goldsmith, M -- New York, N.Y. -- Science. 1981 May 1;212(4494):569-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/drug effects ; Dextroamphetamine/*pharmacology ; Discrimination Learning/*physiology ; Disease Models, Animal ; Female ; Fetus/drug effects ; Lead Poisoning/*physiopathology ; Male ; Pregnancy ; Rats
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  • 21
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    Transport of energy in muscle: the phosphorylcreatine shuttle (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-30
    Description: In order to explain the insulin-like effect of exercise, it was proposed in 1951 that contracting muscle fibers liberate creatine, which acts to produce an acceptor effect--later called respiratory control--on the muscle mitochondria. The development of this notion paralleled the controversy between biochemists and physiologists over the delivery of energy for muscle contraction. With the demonstration of functional compartmentation of creatine kinase on the mitochondrion, it became clear that the actual form of energy transport in the muscle fiber is phosphorylcreatine. The finding of an isoenzyme of creatine phosphokinase attached to the M-line region of the myofibril revealed the peripheral receptor for the mitochondrially generated phosphorylcreatine. This established a molecular basis for a phosphorylcreatine-creatine shuttle for energy transport in heart and skeletal muscle and provided an explanation for the inability to demonstrate experimentally a direct relation between muscle activity and the concentrations of adenosine triphosphate and adenosine diphosphate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bessman, S P -- Geiger, P J -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):448-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6450446" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/metabolism ; Adenosine Triphosphate/*metabolism ; Animals ; Creatine/metabolism ; Creatine Kinase/metabolism ; *Energy Metabolism ; Kinetics ; Mitochondria, Heart/metabolism ; *Muscle Contraction ; Muscles/*metabolism ; Myosins/metabolism ; Phosphocreatine/*metabolism
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  • 22
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    Tyrosine increases blood pressure in hypotensive rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-05-01
    Description: Administration of tyrosine, the amino acid precursor of catecholamines, increased blood pressure 38 to 49 percent in rats made acutely hypotensive by hemorrhage; other large neutral amino acids were ineffective. Tyrosine's effect was abolished by adrenalectomy, suggesting that, in hypotensive animals, it acts by accelerating the peripheral synthesis and release of catecholamines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Conlay, L A -- Maher, T J -- Wurtman, R J -- AM-14228/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 May 1;212(4494):559-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209553" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenalectomy ; Animals ; Blood Pressure/*drug effects ; Catecholamines/metabolism ; Disease Models, Animal ; Hypotension/*drug therapy/physiopathology ; Male ; Rats ; Tyrosine/*pharmacology/therapeutic use
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  • 23
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    Behavioral effects of lead and Toxocara canis in mice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-04
    Description: Adult mice were administered the common parasite Toxocara canis or lead or both. The parasite clearly altered mouse performance on tests of exploration, activity, learning, and motor coordination; behavioral effects in mice receiving lead alone were less general. Consequence of Toxocara administration appeared attenuated in animals receiving both agents. Parasite larvae were found in the central nervous system in all infected mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dolinsky, Z S -- Burright, R G -- Donovick, P J -- Glickman, L T -- Babish, J -- Summers, B -- Cypess, R H -- 08-K4AI00301A-03/AI/NIAID NIH HHS/ -- 08R1AI1478A-03/AI/NIAID NIH HHS/ -- 5S07RR0749-04/RR/NCRR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1142-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268424" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascariasis/*complications ; Behavior, Animal/*physiology ; Brain/parasitology ; Disease Models, Animal ; Lead Poisoning/*complications/physiopathology ; Male ; Mice ; Toxocariasis/*complications/physiopathology
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  • 24
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    Delta9-tetrahydrocannabinol increase plasma testosterone concentrations in mice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: Oral administration of delta 9-tetrahydrocannabinol had a biphasic effect on plasma testosterone concentrations in male mice, causing rapid sustained increases at low doses and subsequent decreases at higher doses. In hypophysectomized and intact mice receiving gonadotropins (human chorionic gonadotropin), treatment with delta 9-tetrahydrocannabinol maintained higher plasma testosterone concentrations. Thus, this cannabinoid may interact with gonadotropin and directly influence testicular steroidogenesis in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalterio, S -- Bartke, A -- Mayfield, D -- 1R01 DA 02/DA/NIDA NIH HHS/ -- P 30 HD 10202/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):581-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264607" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chorionic Gonadotropin/pharmacology ; Dronabinol/*analogs & derivatives/pharmacology ; Hypophysectomy ; Kinetics ; Luteinizing Hormone/*blood ; Male ; Mice ; Testosterone/*blood
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  • 25
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    Opiate antagonist improves neurologic recovery after spinal injury (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-30
    Description: The opiate antagonist naloxone has been used to treat cats subjected to cervical spinal trauma. In contrast to saline-treated controls, naloxone treatment significantly improved the hypotension observed after cervical spinal injury. More critically, naloxone therapy significantly improved neurologic recovery. These findings implicate endorphins in the pathophysiology of spinal cord injury and indicate that narcotic antagonists may have a therapeutic role in this condition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Faden, A I -- Jacobs, T P -- Holaday, J W -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):493-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455690" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Pressure/*drug effects ; Cats ; Disease Models, Animal ; Endorphins/antagonists & inhibitors ; Naloxone/pharmacology/*therapeutic use ; Spinal Cord/blood supply ; Spinal Cord Injuries/*drug therapy/physiopathology
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  • 26
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    Blood-brain glucose transfer: repression in chronic hyperglycemia (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-23
    Description: Diabetic patients with increased plasma glucose concentrations may develop cerebral symptoms of hypoglycemia when their plasma glucose is rapidly lowered to normal concentrations. The symptoms may indicate insufficient transport of glucose from blood to brain. In rats with chronic hyperglycemia the maximum glucose transport capacity of the blood-brain barrier decreased from 400 to 290 micromoles per 100 grams per minute. When plasma glucose was lowered to normal values, the glucose transport rate into brain was 20 percent below normal. This suggests that repressive changes of the glucose transport mechanism occur in brain endothelial cells in response to increased plasma glucose.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gjedde, A -- Crone, C -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):456-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7027439" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; *Blood-Brain Barrier ; Brain/blood supply ; Diabetes Mellitus, Experimental/metabolism ; Glucose/*metabolism ; Hyperglycemia/*metabolism ; Insulin/physiology ; Kinetics ; Rats ; Regional Blood Flow
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  • 27
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    Phototherapy-induced hypocalcemia in newborn rats: prevention by melatonin (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-13
    Description: When young rats are exposed to white fluorescent light the concentration of calcium in their serum decreases. This effect is prevented by shielding the occiput, by inhibiting corticosterone synthesis, and by exogenous melatonin. Furthermore, the expected hypocalcemic response to cortisol injection is prevented by melatonin. Light-induced hypocalcemia may result from increased calcium uptake by bone when the blocking effect of melatonin decreases after pineal inhibition by transcranial illumination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hakanson, D O -- Bergstrom, W H -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):807-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6895262" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/*radiation effects ; Disease Models, Animal ; Female ; Humans ; Hydrocortisone/antagonists & inhibitors ; Hypocalcemia/etiology/*prevention & control ; Infant, Newborn ; Jaundice, Neonatal/therapy ; Light ; Male ; Melatonin/*pharmacology ; Phototherapy/adverse effects ; Rats ; Spectrum Analysis ; Time Factors
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  • 28
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    Retinal chromophore of rhodopsin photoisomerizes within picoseconds (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-27
    Description: A new picosecond resonance Raman technique shows that resonance Raman lines characteristic of a distorted all-trans retinal appear within 30 picoseconds after photolysis of rhodopsin or isorhodopsin. This finding suggests that isomerization is nearly complete within picoseconds of the absorption of a photon.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hayward, G -- Carlsen, W -- Siegman, A -- Stryer, L -- EY-02387/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):942-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466366" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; In Vitro Techniques ; Isomerism ; Kinetics ; Light ; Retinal Pigments/*radiation effects ; *Retinaldehyde/radiation effects ; Rhodopsin/*radiation effects ; Spectrum Analysis, Raman ; *Vision, Ocular ; *Vitamin A/analogs & derivatives
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  • 29
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    Somatic cell hybrids from frog lymphocytes and mouse myeloma cells (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-29
    Description: Stable somatic cell hybrids were obtained by fusing Xenopus lymphocytes with mouse myeloma cells. These hybrids contained one to four Xenopus chromosomes and expressed Xenopus gene products, one of which was a lymphocyte membrane protein of 85,000 daltons precipitated by a monoclonal antibody.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hengartner, H -- Du Pasquier, L -- New York, N.Y. -- Science. 1981 May 29;212(4498):1034-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785884" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies ; Antibodies, Monoclonal ; Cell Line ; Clone Cells ; Genes ; Hybrid Cells/*physiology ; Lymphocytes/*physiology ; Membrane Proteins/biosynthesis ; Mice ; Molecular Weight ; Neoplasms, Experimental/physiopathology ; Plasmacytoma/*physiopathology ; Xenopus
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  • 30
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    Serum albumin beads: an injectable, biodegradable system for the sustained release of drugs (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-10
    Description: Biologically active compounds were entrapped in cross-linked serum albumin microbeads. Injection of these drug-impregnated beads into rabbits produced no adverse immunological reactions. Sustained release (20 days) of progesterone was demonstrated in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, T K -- Sokoloski, T D -- Royer, G P -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):233-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6787705" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Delayed-Action Preparations ; Glutaral ; Injections, Intramuscular ; Injections, Subcutaneous ; Kinetics ; Male ; Microscopy, Electron, Scanning ; Norgestrel/administration & dosage ; Progesterone/*administration & dosage/blood ; Rabbits ; Serum Albumin, Bovine/*administration & dosage
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  • 31
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    Pancreatic islet-acinar cell interaction: amylase messenger RNA levels ar determined by insulin (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-17
    Description: Pancreatic amylase messenger RNA progressively decreases in rats rendered diabetic with streptozotocin. Insulin reverses this effect, inducing a selective decrease in amylase messenger RNA in the pancreas. Parotid amylase messenger RNA is not significantly affected by either diabetes or insulin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korc, M -- Owerbach, D -- Quinto, C -- Rutter, W J -- AM 21344/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 17;213(4505):351-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6166044" target="_blank"〉PubMed〈/a〉
    Keywords: Amylases/*genetics ; Animals ; Diabetes Mellitus, Experimental/*enzymology ; Insulin/pharmacology/*physiology ; Islets of Langerhans/*physiology ; Kinetics ; Male ; Pancreas/drug effects/*enzymology ; Pancreatic Elastase/genetics ; Protein Biosynthesis/drug effects ; RNA, Messenger/*genetics ; Rats ; Transcription, Genetic/drug effects ; Trypsinogen/genetics
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  • 32
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    Dopamine receptor binding is increased in diabetic rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-27
    Description: The binding of [3H]spiperone, a dopamine receptor ligand, to striatal membranes was increased 30 to 35 percent in rats made diabetic with alloxan or streptozotocin. Binding of [3H]spiperone was normal in rats made diabetic with alloxan but treated with insulin. Thus the number of dopamine receptors and central dopaminergic transmission may be altered in diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lozovsky, D -- Saller, C F -- Kopin, I J -- New York, N.Y. -- Science. 1981 Nov 27;214(4524):1031-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6458088" target="_blank"〉PubMed〈/a〉
    Keywords: Alloxan/pharmacology ; Animals ; Blood Glucose/metabolism ; Cell Membrane/metabolism ; Corpus Striatum/*metabolism ; Diabetes Mellitus, Experimental/drug therapy/*metabolism ; Insulin/therapeutic use ; Kinetics ; Male ; Rats ; Rats, Inbred Strains ; Receptors, Dopamine/drug effects/*metabolism ; Spiperone/metabolism ; Streptozocin/pharmacology
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  • 33
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    Seeds of change in embryonic development (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1981 Oct 2;214(4516):42-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280679" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; Embryology/*trends ; Genes ; Selection, Genetic
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  • 34
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    Regulation of leucine metabolism in man: a stable isotope study (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-12-04
    Description: Leucine catabolism is regulated by either of the first two degradative steps: (reversible) transamination to the keto acid or subsequent decarboxylation. A method is described to measure rates of leucine transamination, reamination, and keto acid oxidation. The method is applied directly to humans by infusing the nonradioactive tracer, L-[15N,1-13C]leucine. Leucine transamination was found to be operating several times faster than the keto acid decarboxylation and to be of equal magnitude in adult human males under two different dietary conditions, postabsorptive and fed. These results indicate that decarboxylation, not transamination, is the rate-limiting step in normal human leucine metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matthews, D E -- Bier, D M -- Rennie, M J -- Edwards, R H -- Halliday, D -- Millward, D J -- Clugston, G A -- AM-25994/AM/NIADDK NIH HHS/ -- HD-10667/HD/NICHD NIH HHS/ -- RR-00954/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1129-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302583" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Carbon Isotopes ; Humans ; Kinetics ; Leucine/*metabolism ; Male ; Models, Biological ; Nitrogen Isotopes ; Oxidation-Reduction
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  • 35
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    Assessment of pharmacological treatment of myocardial infarction by phosphorus-31 NMR with surface coils (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-09
    Description: Phosphorus-31 nuclear magnetic resonance (NMR) measurements with small surface coils have been used to observe phosphorus metabolism of perfused hearts within localized regions. The method allows for direct, noninvasive, sequential assessment of the altered regional metabolism resulting from myocardial infarction and its response to drug treatment, which cannot be observed by conventional techniques.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nunnally, R L -- Bottomley, P A -- GM 17172/GM/NIGMS NIH HHS/ -- HL 17655-06/HL/NHLBI NIH HHS/ -- HL 22080/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 9;211(4478):177-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444460" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chlorpromazine/therapeutic use ; Coronary Circulation/drug effects ; Disease Models, Animal ; Magnetic Resonance Spectroscopy/*methods ; Myocardial Infarction/*diagnosis/drug therapy/metabolism ; Phosphorus/*metabolism ; Phosphorus Isotopes ; Rabbits ; Verapamil/therapeutic use
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    The prolactin gene is located on chromosome 6 in humans (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-05-15
    Description: The gene for prolactin has been located on chromosome 6 in humans. DNA fragments of 4.8 and 4.0 kilobases containing prolactin gene sequences were identified in human genomic DNA, whereas DNA fragments of 7.4, 3.6, and 3.3 kilobases containing prolactin gene sequences were found in mouse cells. In somatic cell hybrids of human and mouse cells the 7.4-, 3.6-, and 3.3-kilobase mouse fragments were always present, whereas the 4.8- and 4.0-kilobase human fragments were only present when human chromosome 6 was also present. We conclude that the prolactin gene resides on chromosome 6, a different location from those of the genes for the related hormones chorionic somatomammotropin and growth hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owerbach, D -- Rutter, W J -- Cooke, N E -- Martial, J A -- Shows, T B -- AM 21344/AM/NIADDK NIH HHS/ -- GM 20454/GM/NIGMS NIH HHS/ -- HD 05196/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 May 15;212(4496):815-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7221563" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosomes, Human, 6-12 and X ; Genes ; Genetic Linkage ; Growth Hormone/genetics ; Humans ; Hybrid Cells/physiology ; Mice ; Placental Lactogen/genetics ; Prolactin/*genetics
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    Hyperkeratosis induced by sunlight degradation products of the major polybrominated biphenyl in Firemaster (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-21
    Description: Sunlight photodegradation of 2,2', 4,4', 5,5' -hexabromobiphenyl, the major component of Firemaster, gave a mixture that produces severe hyperkeratosis of the rabbit ear. This component in its pure state does not cause hyperkeratosis. One or more of the four major photolysis products must be responsible for this activity. A similar photodegradation pattern was observed for 2,2', 3,4,4', 5,5' -heptabromobiphenyl, the second largest component of Firemaster.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patterson, D G -- Hill, R H -- Needham, L L -- Orti, D L -- Kimbrough, R D -- Liddle, J A -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):901-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6266016" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biphenyl Compounds/radiation effects ; Chemical Industry ; Disease Models, Animal ; Environmental Exposure ; Keratosis/*chemically induced ; Michigan ; Photochemistry ; *Polybrominated Biphenyls/radiation effects ; Rabbits ; Sunlight
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    Somatomedin-C mediates growth hormone negative feedback by effects on both the hypothalamus and the pituitary (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-12
    Description: Somatomedin-C stimulates somatostatin release to a maximum of 390 percent of basal release during short-term (20-minute) incubation of rat hypothalamus. It has no effect on basal or stimulated growth hormone release from primary cultures of rat adenohypophyseal cells during a 4-hour incubation, but inhibits stimulated release by more that 90 percent after 24 hours. These findings suggest that somatomedin-C participates in the growth hormone negative feedback loop with an immediate effect on hypothalamic somatostatin and a delayed effect on the anterior pituitary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berelowitz, M -- Szabo, M -- Frohman, L A -- Firestone, S -- Chu, L -- Hintz, R L -- AM 18722/AM/NIADDK NIH HHS/ -- AM 24085/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1279-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6262917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bucladesine/pharmacology ; Cells, Cultured ; Dose-Response Relationship, Drug ; Feedback ; Growth Hormone/pharmacology/*secretion ; Hypothalamus/drug effects/*physiology ; Insulin-Like Growth Factor I ; Kinetics ; Pituitary Gland, Anterior/drug effects/*secretion ; Rats ; Somatomedins/*pharmacology
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    Neuroleptic drug-induced dopamine receptor supersensitivity: antagonism by L-prolyl-L-leucyl-glycinamide (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-12-11
    Description: An animal model of tardive dyskinesia was used to evaluate the potential antidyskinetic properties of the neuropeptide L-prolyl-L-leucyl-glycinamide (PLG). In rats, PLG administered concurrently with the neuroleptic drug haloperidol or chlorpromazine antagonized the enhancement of specific [3H]spiroperidol binding in the striatum that is associated with long-term neuroleptic treatment. The results are discussed in relation to a possible functional coupling of the putative PLG receptor with neuroleptic-dopamine receptor complex and clinical implications for tardive dyskinesia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chiu, S -- Paulose, C S -- Mishra, R K -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1261-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117947" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Butyrophenones/*metabolism ; Chlorpromazine/*pharmacology ; Corpus Striatum/*metabolism ; Haloperidol/*pharmacology ; Kinetics ; MSH Release-Inhibiting Hormone/*pharmacology ; Male ; Rats ; Rats, Inbred Strains ; Receptors, Dopamine/drug effects/*metabolism ; Spiperone/*metabolism
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  • 40
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    Long-term potentiation in the hippocampal slice: evidence for stimulated secretion of newly synthesized proteins (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-05
    Description: Long-term potentiation of the hippocampal slice preparation results in an increase in the incorporation of labeled valine into the proteins destined for secretion into the extracellular medium. Double-labeling methods established that the increased secretion of the labeled proteins was limited to the potentiated region of a slice; incorporation of labeled valine was increased in the hippocampus if potentiation was through the Schaffer collaterals and in the dentate if potentiation was through the perforant path. Controls for nonspecific stimulation showed no changes. There appears to be a link between long-term potentiation and the metabolic processes that lead to protein synthesis in the hippocampal slice system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duffy, C -- Teyler, T J -- Shashoua, V E -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1148-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233208" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbon Radioisotopes ; Electric Stimulation ; Hippocampus/*metabolism/physiology ; In Vitro Techniques ; Kinetics ; Nerve Tissue Proteins/*biosynthesis/secretion ; Rats ; Tritium ; Valine
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  • 41
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    Dye coupling and possible electrotonic coupling in the guinea pig neocortical slice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-02
    Description: Iontophoretic injection of the fluorescent dye Lucifer Yellow CH into single neurons of guinea pig neocortical slices resulted in the staining of more than one cell. Dye-coupled neuronal aggregates were found only in the superficial cortical layers and were often organized in vertical columns. Antidromic stimuli evoked all-or-none, subthreshold depolarizations in some superficial cells. These potentials were not eliminated by manganese and did not collide with spikes originating in the soma, suggesting that they arose from electrotonic interaction between superficial cortical neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gutnick, M J -- Prince, D A -- NS 06477/NS/NINDS NIH HHS/ -- NS 12151/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):67-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444449" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Cell Communication ; Cerebral Cortex/*cytology/physiology ; Evoked Potentials ; Fluorescent Dyes ; Guinea Pigs ; In Vitro Techniques ; Intercellular Junctions/physiology ; Kinetics ; Manganese/pharmacology
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    Inhibition of purine nucleoside phosphorylase by 8-aminoguanosine: selective toxicity for T lymphoblasts (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-12-04
    Description: The guanosine analog 8-aminoguanosine is an effective inhibitor of the purine degradative enzyme purine nucleoside phosphorylase, both in vitro and in intact lymphoid cells. In a human lymphoblast tissue culture system, 8-aminoguanosine, in combination with low concentrations of 2'-deoxyguanosine, causes toxicity toward T cells but not B cells. The selective T cell toxicity correlates with increased accumulation of deoxyguanosine triphosphate in the treated T lymphoblasts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kazmers, I S -- Mitchell, B S -- Dadonna, P E -- Wotring, L L -- Townsend, L B -- Kelley, W N -- AM 19045/AM/NIADDK NIH HHS/ -- CA 26032/CA/NCI NIH HHS/ -- CA 26284/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1137-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6795718" target="_blank"〉PubMed〈/a〉
    Keywords: B-Lymphocytes/enzymology ; Cell Line ; Deoxyguanosine/pharmacology ; Guanosine/*analogs & derivatives/pharmacology ; Humans ; Kinetics ; Pentosyltransferases/*antagonists & inhibitors ; Purine-Nucleoside Phosphorylase/*antagonists & inhibitors ; T-Lymphocytes/drug effects/*enzymology
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    Giant synaptic potential hypothesis for epileptiform activity (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-16
    Description: According to one hypothesis, the paroxysmal depolarizing shift observed in the penicillin model of epilepsy results from a giant excitatory postsynaptic potential. This hypothesis has recently been questioned, primarily because it has never been subjected to rigorous experimental examination. Four quantitative predictions were derived from this hypothesis and tested in CA3 pyramidal neurons of the hippocampus. The four critical predictions concern the behavior of the paroxysmal depolarizing shift under current- and voltage-clamp conditions as a function of membrane potential. The experiments confirmed all four predictions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnston, D -- Brown, T H -- NS11535/NS/NINDS NIH HHS/ -- NS15772/NS/NINDS NIH HHS/ -- RR-05471-17/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 16;211(4479):294-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444469" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Disease Models, Animal ; Electric Conductivity ; Epilepsy/*physiopathology ; Guinea Pigs ; Hippocampus/*physiopathology ; In Vitro Techniques ; Membrane Potentials ; Penicillin G ; Synaptic Membranes/physiology
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    Rapid correction of hyponatremia causes demyelination: relation to central pontine myelinolysis (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-06
    Description: The human demyelinative disorder central pontine myelinolysis may be an iatrogenic disease caused by a rapid rise in serum sodium, usually when hyponatremia is corrected. Rats treated with hypertonic saline after 3 days of vasopressin-induced hyponatremia had demyelinative lesions in the corpus striatum, lateral hemispheric white matter, cerebral cortex, hippocampal fimbria, anterior commissure, thalamus, brainstem tegmentum, and cerebellum. Thus, rapid correction of hyponatremia can lead to demyelinative lesions and may be the cause of central pontine myelinolysis in man.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleinschmidt-DeMasters, B K -- Norenberg, M D -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1068-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466381" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood-Brain Barrier ; Brain Diseases/*etiology ; Demyelinating Diseases/*etiology/pathology ; Disease Models, Animal ; Hyponatremia/*complications ; Male ; Pons/*pathology ; Rats
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    Biggest challenge since the double helix (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-04-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):28-30, 32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209514" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Differentiation ; Chromatin/genetics ; DNA/genetics ; *Gene Expression Regulation ; Genes ; Operon ; RNA, Messenger/metabolism ; Ribonucleoproteins/genetics ; Transcription, Genetic
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  • 46
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    Structural correlates of seizure behavior in the mongolian gerbil (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-21
    Description: Hippocampi of seizure-sensitive and seizure-resistant Mongolian gerbils were examined in search of structural correlates of seizure behavior. In animals with well-established seizure histories, differences were found in both presynaptic and postsynaptic structures. Seizing animals had less dense dendritic spines, a greater proportion of mossy tuft area devoted to presynaptic vesicles, and a smaller proportion devoted to spines. The possible relationship of these findings to epilepsy is discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, L A -- Fried, I -- Watanabe, K -- Forsythe, A B -- Scheibel, A B -- 5-507-RR05756-06/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):924-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256289" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Disease Models, Animal ; Gerbillinae/*anatomy & histology/physiology ; Hippocampus/*anatomy & histology/ultrastructure ; Microscopy, Electron ; Seizures/pathology/*physiopathology
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  • 47
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    Binding and mobility of the cell surface receptors for 3,3',5-triiodo-L-thyronine (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-02
    Description: A fluorescent derivative of the thyroid hormone 3,3'-triiodo-L-thyronine binds to cultured mouse fibroblasts; such binding is saturable. Video intensification fluorescence microscopy indicates that binding occurs at the plasma membrane. Diffusion coefficients, obtained by fluorescence photobleaching recovery, are consistent with binding to a protein receptor on the cell surface.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maxfield, F R -- Willingham, M C -- Pastan, I -- Dragsten, P -- Cheng, S Y -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):63-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6255563" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/*metabolism ; Cells, Cultured ; Cytoplasmic Granules/metabolism ; Diffusion ; Endocytosis ; Kinetics ; Membrane Fluidity ; Membrane Proteins/metabolism ; Mice ; Microscopy, Fluorescence ; Receptors, Cell Surface/*metabolism ; Receptors, Thyroid Hormone ; Triiodothyronine/*metabolism
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    Spontaneous diabetes in rats: destruction of islets is prevented by immunological tolerance (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-18
    Description: Spontaneous diabetes occurring in "BB" rats (derived from a colony of outbred Wistar rats) is the result of destruction of pancreatic islets by infiltrating mononuclear cells (insulitis) and may be a disease very similar to human juvenile onset diabetes. Both diseases probably have an autoimmune etiology. Evidence is presented that islets transplanted to diabetic BB rats are destroyed by the original disease process. Inoculation of bone marrow from normal (nondiabetes-susceptible) rat donors into neonatal BB recipients usually prevented the development of hyperglycemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naji, A -- Silvers, W K -- Bellgrau, D -- Barker, C F -- AM19525/AM/NIADDK NIH HHS/ -- AM26007/AM/NIADDK NIH HHS/ -- CA18640/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 18;213(4514):1390-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6791286" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoimmune Diseases/*immunology ; Bone Marrow Transplantation ; Diabetes Mellitus, Experimental/*immunology ; Disease Models, Animal ; Graft Rejection ; Immune Tolerance ; Islets of Langerhans/*immunology ; Islets of Langerhans Transplantation ; Rats
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    Understanding the bases of sex differences (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naftolin, F -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1263-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209509" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/secretion ; Animals ; Estrogens/secretion ; Female ; Genes ; Humans ; Male ; Ovary/*physiology ; Reproduction ; *Sex Characteristics ; Sex Determination Analysis ; Sexual Behavior ; Spermatogenesis
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  • 50
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    Pineal N-acetyltransferase is inactivated by disulfide-containing peptides: insulin is the most potent (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: Pineal N-acetyltransferase can be inactivated in broken cell preparations by cystamine through a mechanism of thiol-disulfide exchange. Some, but not all, disulfide-containing peptides can inactivate this enzyme; the most potent inactivator is insulin. These findings suggest that a disulfide-containing peptide with high reactivity toward N-acetyltransferase may participate in the intracellular regulation of this enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Namboodiri, M A -- Favilla, J T -- Klein, D C -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):571-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017937" target="_blank"〉PubMed〈/a〉
    Keywords: Acetyltransferases/*antagonists & inhibitors ; Animals ; Disulfides/pharmacology ; Dithiothreitol/pharmacology ; Hormones/pharmacology ; Hydrogen-Ion Concentration ; Insulin/*pharmacology ; Kinetics ; Male ; Peptides/*pharmacology ; Pineal Gland/*enzymology ; Rats ; Structure-Activity Relationship
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    Corticosterone increases the amount of protein 1, a neuron-specific phosphoprotein, in rat hippocampus (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-05
    Description: Corticosterone increased the amount of the neuron-specific phosphoprotein protein 1 in the hippocampus, a brain region rich in corticosterone receptors, but not in several brain regions that contain relatively few corticosterone receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nestler, E J -- Rainbow, T C -- McEwen, B S -- Greengard, P -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1162-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785886" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/drug effects/*metabolism ; Corticosterone/*pharmacology ; Estradiol/pharmacology ; Female ; Hippocampus/drug effects/*metabolism ; Kinetics ; Nerve Tissue Proteins/*biosynthesis ; Organ Specificity ; Rats ; Receptors, Steroid/metabolism ; Synapsins
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Quantitative autoradiography of [3H]muscimol binding in rat brain (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-27
    Description: A simple quantitative autoradiographic technique for the study of neurotransmitter receptors that includes the use of a tritium-sensitive film permits saturation, kinetic, and competition studies of brain samples as small as 0.01 cubic millimeter. This technique was used to study [3H]muscimol binding in rat brain. Unilateral gamma-aminobutyric acid receptor supersensitivity was observed in the substantia nigra pars reticulata after production of localized lesions of the ipsilateral corpus striatum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Penney, J B Jr -- Pan, H S -- Young, A B -- Frey, K A -- Dauth, G W -- NS00420-02/NS/NINDS NIH HHS/ -- NS00464-02/NS/NINDS NIH HHS/ -- NS15140-02/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 27;214(4524):1036-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Brain/drug effects/*metabolism ; Kainic Acid/pharmacology ; Kinetics ; Muscimol/*metabolism ; Oxazoles/*metabolism ; Rats ; Receptors, Drug/*metabolism ; Receptors, GABA-A ; Tritium
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    Polymorphism in the 5'-flanking region of the human insulin gene and its possible relation to type 2 diabetes (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-04
    Description: The arrangement of the human insulin gene in DNA from 87 individuals was analyzed by the Southern blot hybridization technique with a cloned genomic human insulin probe. Insertions of 1.5 to 3.4 kilobase pairs in the 5'-flanking region of the gene were found in DNA from 38 individuals. These insertions occurred within 1.3 kilobase pairs of the transcription initiation site. In contrast, no insertions were observed in the region 3' to the coding sequence. The prevalence of these insertions in type 2 diabetes was significantly greater than in the other groups (P less than .001). The limitation of this striking length polymorphism to a potential promoter region suggests that these insertions may play a role in insulin gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rotwein, P -- Chyn, R -- Chirgwin, J -- Cordell, B -- Goodman, H M -- Permut, M A -- AM-00033/AM/NIADDK NIH HHS/ -- AM-07120/AM/NIADDK NIH HHS/ -- AM-16724/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1117-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6267694" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA Restriction Enzymes ; Diabetes Mellitus/*genetics ; Gene Expression Regulation ; Genes ; Genetic Linkage ; Humans ; Insulin/*genetics ; Leukocytes ; Operon ; Polymorphism, Genetic
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    Tyrosine administration decreases vulnerability to ventricular fibrillation in the normal canine heart (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-13
    Description: Intravenous infusion of tyrosine (1, 2, or 4 milligrams per kilogram) for 20 to 30 minutes caused dose-dependent increases in the ventricular fibrillation threshold in normal dogs. Administration of valine, a neutral amino acid that competes with tyrosine for uptake at the blood-brain barrier, in a dose equimolar to the most effective dose of tyrosine, slightly decreased the ventricular fibrillation threshold when given alone and significantly blocked elevation of the ventricular fibrillation threshold after tyrosine infusion. Hence, tyrosine, presumably acting in the central nervous system, can protect against certain ventricular arrhythmias.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scott, N A -- DeSilva, R A -- Lown, B -- Wurtman, R J -- 21384-08/PHS HHS/ -- AM-14228/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 13;211(4483):727-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455710" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood-Brain Barrier ; Catecholamines/metabolism ; Disease Models, Animal ; Dogs ; Tyrosine/antagonists & inhibitors/metabolism/*therapeutic use ; Valine/pharmacology ; Ventricular Fibrillation/*prevention & control
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    Fetal alcohol syndrome: embryogenesis in a mouse model (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-20
    Description: When two small doses of ethanol were administered to pregnant mice during the gastrulation stage of embryogenesis, the embryos developed craniofacial malformations closely resembling those seen in the human fetal alcohol syndrome. Striking histological changes appeared in the developing brain (neuroectoderm) within 24 hours of exposure. Decreased development of the neural plate and its derivatives apparently accounts for the craniofacial malformations. The critical exposure period is equivalent to the third week in human pregnancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sulik, K K -- Johnston, M C -- Webb, M A -- DE 02668/DE/NIDCR NIH HHS/ -- DE 05906/DE/NIDCR NIH HHS/ -- RR 05333/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):936-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6795717" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Child ; Disease Models, Animal ; Embryo, Mammalian/*drug effects/ultrastructure ; Ethanol/*pharmacology ; Eye Abnormalities ; Female ; Fetal Alcohol Spectrum Disorders/*physiopathology ; Humans ; Mice ; Mice, Inbred C57BL ; Microscopy, Electron, Scanning ; Pregnancy
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    Phase variation of type 1 fimbriae in Escherichia coli is under transcriptional control (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-16
    Description: An operon fusion of the lac genes to those required for synthesis of type 1 fimbriae (pili) has been achieved in a K12 strain of Escherichia coli lysogenized by the bacteriophage mu d (Ap4, lac). Synthesis of beta-galactosidase, therefore, reflected pil gene transcription and was used as a probe of fimbrial regulation. Expression of the operon fusion was found to oscillate, demonstrating that phase variation between fimbriate and nonfimbriate states is under transcriptional control. The transition rates from fimbriate to nonfimbriate were 1.05 X 10(-3) per bacterium per generation and from nonfimbriate to fimbriate, 3.12 X 10(-3) per bacterium per generation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eisenstein, B I -- AM-00686/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 16;214(4518):337-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6116279" target="_blank"〉PubMed〈/a〉
    Keywords: Escherichia coli/*genetics/pathogenicity ; Fimbriae, Bacterial/*physiology ; *Gene Expression Regulation ; Genes ; Genes, Bacterial ; Genes, Regulator ; Transcription, Genetic
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    Vertebrate cell cycle modulates infection by protozoan parasites (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-27
    Description: Synchronized HeLa cell populations were exposed to Trypanosoma cruzi or Toxoplasma gondii, obligate intracellular protozoan parasites that cause Chagas' disease and toxoplasmosis, respectively, in humans. The ability of the two parasites to infect HeLa cells increased as the HeLa cells proceeded from the G1 phase to the S phase of their growth cycle and decreased as the cells entered G2-M. Characterization of the S-phase cell surface components responsible for this phenomenon could be beneficial in the development of vaccines against these parasitic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dvorak, J A -- Crane, M S -- New York, N.Y. -- Science. 1981 Nov 27;214(4524):1034-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7029713" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Cycle ; HeLa Cells/physiology ; Humans ; Kinetics ; Toxoplasma/pathogenicity/*physiology ; Trypanosoma cruzi/pathogenicity/*physiology
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    Metkephamid, a systemically active analog of methionine enkephalin with potent opioid alpha-receptor activity (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-02-06
    Description: Metkephamid is an analog of methionine enkephalin that retains high affinity for the delta receptor and is a systemically active analgesic. Since it is at least 100 times more potent than morphine as an analgesic when placed directly into the lateral ventricles, and is 30 to 100 times more potent on the delta receptor and yet is roughly equipotent on the mu receptor in vitro, it is concluded that it probably produces analgesia by action on delta receptors as well as, or rather than, on mu receptors. It has less tendency to produce respiratory depression, tolerance, and physical dependence than standard analgesics, and it is presently undergoing clinical trial.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frederickson, R C -- Smithwick, E L -- Shuman, R -- Bemis, K G -- New York, N.Y. -- Science. 1981 Feb 6;211(4482):603-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6256856" target="_blank"〉PubMed〈/a〉
    Keywords: *Analgesics ; Animals ; Brain/*drug effects ; Dose-Response Relationship, Drug ; Endorphins/*pharmacology ; *Enkephalin, Methionine/*analogs & derivatives ; Enkephalins/*pharmacology ; Humans ; Kinetics ; Male ; Mice ; Rats ; Receptors, Opioid/*drug effects ; Structure-Activity Relationship ; Substance-Related Disorders/etiology
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    Optical recording of calcium action potentials from growth cones of cultured neurons with a laser microbeam (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-05
    Description: Simultaneous recordings of calcium action potentials directly from growth cones and from somata of neuroblastoma cells indicated that they could be generated in the neurites at or near growth cones. Growth cone responses were measured with a fluorescent voltage-sensitive dye and a 5-milliwatt helium-neon laser microbeam as a monitoring light source.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grinvald, A -- Farber, I C -- NS14716/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1164-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233210" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Calcium/*pharmacology ; Cells, Cultured ; Chickens ; Evoked Potentials/drug effects ; Kinetics ; Lasers ; Microscopy, Fluorescence ; Neurons/drug effects/*physiology
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    Thyrotropin-releasing hormone improves cardiovascular function in experimental endotoxic and hemorrhagic shock (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-10
    Description: Thyrotropin-releasing hormone significantly improved cardiovascular function when it was injected intravenously into conscious rats subjected to experimental endotoxic or hemorrhagic shock. Because thyrotropin-releasing hormone appears to be a "physiologic: opiate antagonist without effects on pain responsiveness, it may provide therapeutic benefits in the treatment of shock or acute hypotension.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holaday, J W -- D'Amato, R J -- Faden, A I -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):216-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6787704" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Pressure/*drug effects ; Disease Models, Animal ; Endotoxins ; Heart Rate/drug effects ; Male ; Rats ; Shock, Hemorrhagic/*physiopathology ; Shock, Septic/*physiopathology ; Thyrotropin-Releasing Hormone/*pharmacology
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    beta-Endorphin: possible involvement in the antihypertensive effect of central alpha-receptor activation (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-02
    Description: Clonidine and L-alpha-methylnoradrenaline (but not D-alpha-methylnoradrenaline) increase the release of a substance with beta-endorphin immunoreactivity from slices of brainstem of spontaneously hypertensive rats, but not that of normotensive rats. It was reported earlier that opiate antagonists inhibit the hypotensive action of clonidine and alpha-methyldopa in spontaneously hypertensive but not in normotensive rats and that beta-endorphin has hypotensive effects of its own. Together, these findings indicate that release of beta-endorphin by central alpha-receptor agonists may contribute to the antihypertensive action of these drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kunos, G -- Farsang, C -- Ramirez-Gonzales, M D -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):82-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6108611" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic alpha-Agonists/*pharmacology ; Animals ; Brain Stem/*metabolism ; Clonidine/pharmacology ; Disease Models, Animal ; Endorphins/*metabolism ; Hypertension/*physiopathology ; Immunoassay ; Male ; Naloxone/pharmacology ; Nordefrin/pharmacology ; Rats
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    Hyperthermia-induced seizures in the rat pup: a model for febrile convulsions in children (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-28
    Description: Seizures were produced in rat pups by ambient hyperthermia. Seizure threshold temperatures, measured rectally and intracerebrally, increased between 2 and 10 days of age. Electrocortical paroxysmal discharges were confirmed in hyperthermic 6- and 10-day-old pups. The increasing resistance to hyperthermic seizures with maturation and the electroencephalographic changes induced by hyperthermia are similar to those in young children.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holtzman, D -- Obana, K -- Olson, J -- NS 16256/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):1034-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268407" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Brain/physiopathology ; Disease Models, Animal ; Electroencephalography ; Fever/*complications ; Rats ; Seizures/*physiopathology ; Seizures, Febrile/*physiopathology
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    Two distinct central serotonin receptors with different physiological functions (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-05-15
    Description: Two distinct serotonin (5-hydroxytryptamine) receptors designated serotonin 1 and serotonin 2 bind tritium-labeled serotonin and tritium-labeled spiroperidol, respectively. Drug potencies at serotonin 2 sites, but not at serotonin 1 sites, predict their effects on the "serotonin behavioral syndrome," indicating that serotonin 2 sites mediate these behaviors. The limited correlation of drug effects with regulation by guanine nucleotides suggests that serotonin 1 sites might be linked to adenylate cyclase. Drug specificities of serotonin-elicited synaptic inhibition and excitation may reflect serotonin 1 and serotonin 2 receptor interactions, respectively.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peroutka, S J -- Lebovitz, R M -- Snyder, S H -- DA-00074/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1981 May 15;212(4496):827-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7221567" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Animals ; Behavior, Animal/*physiology ; Brain/*physiology ; Guanine Nucleotides/physiology ; Kinetics ; Male ; Rats ; Receptors, Serotonin/*physiology ; Serotonin/metabolism ; Spiperone/metabolism ; Structure-Activity Relationship
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    Primary structure of a large aminoacyl-tRNA synthetase (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Putney, S D -- Royal, N J -- Neuman de Vegvar, H -- Herlihy, W C -- Biemann, K -- Schimmel, P -- GM05472/GM/NIGMS NIH HHS/ -- GM23562/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1497-501.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7025207" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine-tRNA Ligase/*genetics ; Amino Acid Sequence ; Amino Acyl-tRNA Synthetases/*genetics ; Base Sequence ; Escherichia coli/*enzymology ; Genes ; Mass Spectrometry ; Peptide Fragments/analysis
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    Germplasm conservation (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Russell, E S -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1074, 1076.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6946561" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Disease Models, Animal ; Dogs ; *Genetic Engineering ; *Genetics, Medical ; Humans ; Mice ; Mutation ; Rats
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    Intestinal diffusion barrier: unstirred water layer or membrane surface mucous coat? (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-11
    Description: The dimensions of the small intestinal diffusion barrier interposed between luminal nutrients and their membrane receptors were determined from kinetic analysis of substrate hydrolysis by integral surface membrane enzymes. The calculated equivalent thickness of the unstirred water layer was too large to be compatible with the known dimensions of rat intestine. The discrepancy could be reconciled by consideration of the mucous coat overlying the intestinal surface membrane. Integral surface membrane proteins could not be labeled by an iodine-125 probe unless the surface coat was first removed. The mucoprotein surface coat appears to constitute an important diffusion barrier for nutrients seeking their digestive and transport sites on the outer intestinal membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smithson, K W -- Millar, D B -- Jacobs, L R -- Gray, G M -- AM 05418/AM/NIADDK NIH HHS/ -- AM 11270/AM/NIADDK NIH HHS/ -- AM 15802/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1241-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302593" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/*metabolism ; Diffusion ; Disaccharides/metabolism ; *Intestinal Absorption ; Jejunum/*metabolism/ultrastructure ; Kinetics ; Male ; Microscopy, Electron ; Microvilli/*metabolism/ultrastructure ; Rats ; Rats, Inbred Strains
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