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  • Rats  (692)
  • Mutation
  • American Association for the Advancement of Science (AAAS)  (740)
  • 1980-1984  (740)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (740)
  • Springer  (23)
Years
Year
  • 1
    Publication Date: 1980-06-27
    Description: The enzyme NADPH-cytochrome c (P-450) reductase was identified by indirect immunofluorescence in hepatocytes, bronchioles, and proximal tubules of liver, lung, and kidney, respectively, of rats and minipigs that had been injected with phenobarbital or saline. The distribution of this component of the cytochrome P-450-mediated microsomal system may be relevant to sites of drug toxicity and carcinogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dees, J H -- Coe, L D -- Yasukochi, Y -- Masters, B S -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1473-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6770464" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fluorescent Antibody Technique ; Kidney/drug effects/*enzymology ; Liver/drug effects/*enzymology ; Lung/drug effects/*enzymology ; Male ; NADPH-Ferrihemoprotein Reductase/*metabolism ; Organ Specificity ; Phenobarbital/*pharmacology ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1980-05-02
    Description: The highly selective, enzyme-activated, irreversible inhibitor of L-ornithine decarboxylase, DL-alpha-difluoromethylornithine, suppresses the increase in uterine L-ornithine decarboxylase activity associated with early embryogenesis in the mouse and arrests embryonic development at that stage. Contragestational effects were confirmed in the rat and rabbit. An increase in L-ornithine decarboxylase activity that leads to a rapid increase in putrescine concentration appears to be essential during a critical period after implantation for continued mammalian embryonal growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fozard, J R -- Part, M L -- Prakash, N J -- Grove, J -- Schechter, P J -- Sjoerdsma, A -- Koch-Weser, J -- New York, N.Y. -- Science. 1980 May 2;208(4443):505-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6768132" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosylmethionine Decarboxylase/metabolism ; Animals ; Carboxy-Lyases/*physiology ; Eflornithine ; Embryo, Mammalian/drug effects/*physiology ; Female ; Gestational Age ; Mice ; Ornithine/*analogs & derivatives/pharmacology ; Ornithine Decarboxylase/*physiology ; Ornithine Decarboxylase Inhibitors ; Polyamines/metabolism ; Pregnancy ; Rabbits ; Rats ; Uterus/drug effects/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1980-11-07
    Description: An analog of luteinizing hormone-releasing hormone containing a gamma-lactam as a conformational constraint has been prepared with the use of a novel cyclization of a methionine sulfonium salt. The analog is more active as a luteinizing hormone-releasing hormone agonist that the parent hormone, and provides evidence for a bioactive conformation containing a beta-turn.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freidinger, R M -- Veber, D F -- Perlow, D S -- Brooks, J R -- Saperstein, R -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):656-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001627" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Assay ; Cells, Cultured ; Female ; *Gonadotropin-Releasing Hormone/analogs & derivatives ; Hydrogen Bonding ; Lactams ; Protein Conformation ; Rats ; Structure-Activity Relationship
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1980-11-07
    Description: Cytochemical staining of demyelinated peripheral axons revealed two types of axon membrane organization, one of which suggests that the demyelinated axolemma acquires a high density of sodium channels. Ferric ion-ferrocyanide stain was confined to a restricted region of axon membrane at the beginning of a demyelinated segment or was distributed throughout the demyelinated segment of axon. The latter pattern represents one possible morphological correlate of continuous conduction through a demyelinated segment and suggests a reorganization of the axolemma after demyelination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Foster, R E -- Whalen, C C -- Waxman, S G -- NS-15320/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):661-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159685" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Demyelinating Diseases/metabolism/*pathology ; Disease Models, Animal ; Ion Channels/*metabolism ; Male ; Neural Conduction ; Neurilemma/*metabolism/pathology ; Rats ; Staining and Labeling
    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
    Publication Date: 1980-01-11
    Description: A new N-methylpurine riboside (doridosine), probably N1-Methylisoguanosine, was isolated from the digestive glands of a nudibranch. Doridosine produces prolonged hypotension and bradycardia in anesthetized rats, decreases the rate and the amplitude of contraction of guinea pig atria in vitro, and causes the heart rate in anesthetized mice to be reduced by 50 percent for many hours after which the animals recover completely.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fuhrman, F A -- Fuhrman, G J -- Kim, Y H -- Pavelka, L A -- Mosher, H S -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):193-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350655" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antihypertensive Agents/*isolation & purification ; Guanosine/*analogs & derivatives/isolation & purification/pharmacology ; Guinea Pigs ; Heart Rate/drug effects ; Mice ; Mollusca/analysis ; Rats
    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
    Publication Date: 1980-05-02
    Description: Analysis of extracts of the bloodstream forms of Trypanosoma brucei showed that both DNA polymerase-alpha and DNA polymerase-beta activities were present. The detection of DNA polymerase-beta in T. brucei demonstrates the presence of this enzyme in unicellular organisms. DNA polymerase-beta is present also in Leishmania mexicana. The DNA polymerases in T. brucei are immunologically distinct from the host enzymes. The structural differences between the parasite and the host enzymes could be exploited for the development of agents to combat parasitic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, L M -- Cheriathundam, E -- Mahoney, E M -- Cerami, A -- New York, N.Y. -- Science. 1980 May 2;208(4443):510-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367875" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centrifugation, Density Gradient ; Chickens ; DNA Polymerase I/analysis ; DNA Polymerase II/analysis ; DNA Polymerase III/analysis ; DNA-Directed DNA Polymerase/*analysis ; Fishes ; Immune Sera ; Leishmania/*enzymology ; Molecular Weight ; Rabbits ; Rats ; Species Specificity ; Trypanosoma brucei brucei/*enzymology
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-07
    Description: Lanosterol, a cholesterol precursor that increases considerably in the platelets of rats treated with oral contraceptives, was incubated with either platelet-rich plasma or washed platelet suspension. After 2 minutes there was a remarkable dose-related increase in platelet activity. This platelet hyperactivity was measured by clotting time and platelet aggregation could not be reproduced by cholesterol or ethinylestradiol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ciavatti, M -- Dumont, E -- Benoit, C -- Renaud, S -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):642-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433990" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Coagulation/*drug effects ; Blood Platelets/*drug effects ; Contraceptives, Oral/*pharmacology ; Dose-Response Relationship, Drug ; Female ; Lanosterol/*pharmacology ; Platelet Aggregation/*drug effects ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 1980-12-05
    Description: A new dopamine analog, 6,7-dihydroxy-2-dimethylaminotetralin (TL-99), was compared to apomorphine in three tests of dopaminergic function in the central nervous system. The tests, performed on rats, included production of changes in locomotor activity (involving both presynaptic and postsynaptic receptors), inhibition of dopa accumulation (quantifying presynaptic receptor activity), and the rotation model (quantifying postsynaptic receptor activation). Apomorphine was efficacious at both presynaptic and postsynaptic receptors, whereas TL-99 was much more efficacious at the presynaptic receptor. This result indicates not only that differences exist between presynaptic and postsynaptic dopamine receptors, but also that these differences may be exploited in the design of selective dopamine agonists.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodale, D P -- Rusterholz, D B -- Long, J P -- Flynn, J R -- Walsh, B -- Cannon, J G -- Lee, T -- GM 12675/GM/NIGMS NIH HHS/ -- GM-22365/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1141-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444443" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apomorphine/pharmacology ; Behavior, Animal/drug effects ; Brain/*drug effects ; Levodopa/metabolism ; Motor Activity/drug effects ; Naphthols ; Rats ; Receptors, Dopamine/*drug effects ; Synaptic Membranes/*drug effects ; *Tetrahydronaphthalenes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-05
    Description: Many types of cells methylate phospholipids using two methyltransferase enzymes that are asymmetrically distributed in membranes. As the phospholipids are successively methylated, they are translocated from the inside to the outside of the membrane. When catecholamine neurotransmitters, lectins, immunoglobulins or chemotaxic peptides bind to the cell surface, they stimulate the methyltransferase enzymes and reduce membrane viscosity. The methylation of phospholipids is coupled to Ca2+ influx and the release of arachidonic acid, lysophosphatidylcholine, and prostaglandins. These closely associated biochemical changes facilitate the transmission of many signals through membranes, resulting in the generation of adenosine 3',5'-monophophate in many cell types, release of histamine in mast cells and basophils, mitogenesis in lymphocytes, and chemotaxis in neutrophils.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirata, F -- Axelrod, J -- New York, N.Y. -- Science. 1980 Sep 5;209(4461):1082-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6157192" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Medulla/metabolism ; Animals ; Arachidonic Acids/metabolism ; Calcium/metabolism ; Cell Membrane/metabolism ; Chemotaxis, Leukocyte ; Histamine Release ; Lymphocyte Activation ; *Membrane Fluidity ; Membrane Lipids/*metabolism ; Methylation ; Phosphatidylcholines/metabolism ; Phosphatidylethanolamines/metabolism ; Phospholipids/*metabolism ; Rats ; Receptors, Adrenergic, beta/metabolism ; Receptors, Drug/*physiology ; S-Adenosylmethionine/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 1980-01-04
    Description: Morphine and beta-endorphin inhibit the shaking response of pentobarbital-anesthetized rats to ice water. Stereotaxically guided administration of antibodies to cerebroside sulfate into the periaqueductal gray region, the most sensitive brain region in which to demonstrate inhibition of this response, antagonizes the effect of morphine and beta-endorphin. These results suggest that cerebroside sulfate may be an integral component of an opiate receptor in rat brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Craves, F B -- Zalc, B -- Leybin, L -- Baumann, N -- Loh, H H -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):75-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243189" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Antibody Reactions ; Behavior, Animal/drug effects ; Biological Assay ; Brain/*immunology ; Cerebral Aqueduct ; Endorphins/*antagonists & inhibitors ; Male ; Morphine/*antagonists & inhibitors ; Pentobarbital/pharmacology ; Rats ; Receptors, Opioid/*immunology ; Sulfoglycosphingolipids/*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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