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  • Rats  (160)
  • American Association for the Advancement of Science (AAAS)  (160)
  • 1980-1984  (160)
  • 1981  (160)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (160)
  • Springer  (4)
Years
  • 1980-1984  (160)
Year
  • 1
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    Testosterone: a major determinant of extragenital sexual dimorphism (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-20
    Description: Sexual dimorphism in selected extragenital tissues is described with emphasis on the molecular basis of the differences. Testosterone rather than 5 alpha-dihydrotestosterone appears to be the major intracellular androgen in organs other than skin and reproductive tract, but other steroid metabolites and their receptors are required to produce the diverse tissue differences observed in males and females. There is also evidence that multiple hormones from several endocrine glands are required to act in concert with androgens to produce and maintain their effects. Although many of the consequences of sexual dimorphism, such as body size and strength, have been evident for centuries, other differences between males and females such as disease incidence, response to drugs and toxins, and the metabolism and assimilation of dietary constituents have only recently been discovered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bardin, C W -- Catterall, J F -- HD-13541/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1285-94.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010603" target="_blank"〉PubMed〈/a〉
    Keywords: Androgen-Insensitivity Syndrome/metabolism ; Androgens/metabolism/physiology ; Animals ; Erythropoiesis ; Estradiol/physiology ; Humans ; Kidney/metabolism ; Liver/metabolism ; Male ; Mice ; Muscles/metabolism ; Progestins/physiology ; Proteins/secretion ; Rats ; Receptors, Androgen/metabolism ; *Sex Differentiation ; Testosterone/metabolism/*physiology ; Transcription, Genetic
    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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    Micromolar calcium stimulates proteolysis and glutamate binding in rat brain synaptic membranes (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-22
    Description: Incubation of cortical synaptic membranes with low concentrations of calcium resulted in a decrease in the amount of a high-molecular-weight doublet protein and an increase in the sodium-independent binding of glutamate. Both effects were blocked by the thiol protease inhibitor leupeptin. These results suggest that calcium-induced proteolysis of membrane components regulates the number of glutamate receptors in neuronal membranes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baudry, M -- Bundman, M C -- Smith, E K -- Lynch, G S -- MH-19793-09/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 May 22;212(4497):937-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7015504" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/antagonists & inhibitors/*pharmacology ; Cerebellum/metabolism ; Cerebral Cortex/metabolism ; Cysteine Endopeptidases ; Endopeptidases/*metabolism ; Glutamates/*metabolism ; Leupeptins/pharmacology ; Membrane Proteins/*metabolism ; Molecular Weight ; Rats ; Synaptic Membranes/*metabolism
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  • 3
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    Site-specific, sustained release of drugs to the brain (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-18
    Description: A dihydropyridine-pyridinium salt type of redox system is used in a general and flexible method for the site-specific or sustained delivery (or both) of drugs to the brain. A biologically active compound linked to a lipoidal dihydropyridine carrier easily penetrates the blood-brain barrier. Oxidation of the carrier part in vivo to the ionic pyridinium salt prevents its elimination from the brain, while elimination from the general circulation is accelerated. Subsequent cleavage of the quaternary carrier-drug species results in sustained delivery of the drug in the brain and facile elimination of the carrier part.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bodor, N -- Farag, H H -- Brewster, M E 3rd -- GM 27167/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 18;214(4527):1370-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7313698" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Berberine/administration & dosage ; Blood-Brain Barrier ; Brain Diseases/*drug therapy ; Metabolic Clearance Rate ; Nicotinic Acids/administration & dosage ; Oxidation-Reduction ; Phenethylamines/administration & dosage ; Pyridines/*administration & dosage ; Pyridinium Compounds/*administration & dosage ; Rats
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  • 4
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    Living tissue formed in vitro and accepted as skin-equivalent tissue of full thickness (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-06
    Description: Living skin-equivalent grafts consisting of fibroblasts cast in collagen lattices and seeded with epidermal cells were successfully grafted onto the donors of the cells. The grafts were vascularized, did not evoke a homograft reaction, inhibited wound contraction, filled the wound space, and persisted.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, E -- Ehrlich, H P -- Buttle, D J -- Nakatsuji, T -- GN25561/PHS HHS/ -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1052-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7008197" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biocompatible Materials ; *Collagen ; Epidermis/cytology ; Extracellular Space ; Fibroblasts/*transplantation ; Graft Rejection ; Male ; Rats ; *Skin Transplantation ; Wound Healing
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  • 5
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    Morphiceptin (NH4-tyr-pro-phe-pro-COHN2): a potent and specific agonist for morphine (mu) receptors (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-03
    Description: The synthetic peptide NH2-Tyr-Pro-Phe-Pro-CONH2 (morphiceptin), which is the amide of a fragment of the milk protein beta-casein, has morphinelike activities and is highly specific for morphine (mu) receptors but not for enkephalin (delta) receptors. It is as active as morphine in the guinea pig ileum but much less active in the mouse and rat vas deferens. The discovery of this specific morphine receptor ligand substantiates the hypothesis of multiple opiate receptors. The ligand, which may be of physiological significance since a very similar, or identical, activity can be detected in enzymatic digests of beta-casein, may prove useful for further investigation of the functions of opiate receptor subtypes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, K J -- Lillian, A -- Hazum, E -- Cuatrecasas, P -- Chang, J K -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):75-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259732" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Caseins/pharmacology ; Dihydromorphine/metabolism ; Endorphins/*pharmacology ; Enkephalins/metabolism ; Guanosine Triphosphate/pharmacology ; Guinea Pigs ; Ileum/drug effects ; Male ; Mice ; Naloxone/metabolism ; Rats ; Receptors, Opioid/*drug effects ; Sodium/pharmacology ; Vas Deferens/drug effects
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  • 6
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    Lactose facilitates the intestinal absorption of lead in weanling rats (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-02
    Description: The milk sugar lactose is known to facilitate calcium absorption and has been shown to enhance the uptake of essential trace metals from the intestines as well. Its physiological role as the major carbohydrate source for suckling mammals is thus complemented by its ability to facilitate the absorption of necessary minerals. The studies reported here show that the intestinal absorption of lead and its uptake into blood, liver, kidney, and bone are also increased by lactose in young weanling rats. These data extend the known range of lactose facilitation of mineral absorption to a nonessential, toxic element, confirming the nonspecificity of its action on the gut. In addition, they suggest an explanation for some of the conflicting evidence regarding the prophylactic efficacy of milk in lead poisoning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bushnell, P J -- DeLuca, H F -- ES-05147/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):61-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444448" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Disaccharides/pharmacology ; Hexoses/metabolism ; Intestinal Absorption/*drug effects ; Lactose/*pharmacology ; Lead/*metabolism ; Lead Poisoning/metabolism ; Male ; Milk/metabolism ; Rats ; Stimulation, Chemical ; Tissue Distribution
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  • 7
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    Rheumatoid factor-like immunoglobulin M protects previously uninfected rat pups and dams from Trypanosoma lewisi (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-09
    Description: The serum of lactating rats that have never been infected with the protozoan parasite Trypanosoma lewisi contains a rheumatoid factor-like immunoglobulin M (IgM). This IgM amplifies a specific immunoglobulin G (IgG) response to the parasite and accounts for the unusual resistance of previously uninfected lactating rats and their suckling pups to infection with T. lewisi. A similar rheumatoid factor-like IgM, which is induced late in the usual course of infection with T. lewisi in nonlactating rats, amplifies an earlier IgM response and terminates the infection. To our knowledge, this is the first description of a rheumatoid factor, which is classified as an autoimmune antibody, acting in a protective manner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clarkson, A B Jr -- Mellow, G H -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):186-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7025211" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Suckling/immunology ; Antigen-Antibody Complex ; Female ; Immunoglobulin G ; Immunoglobulin M/*immunology ; *Lactation ; Pregnancy ; Rats ; Rheumatoid Factor/*immunology ; Trypanosoma lewisi/immunology ; Trypanosomiasis/*immunology
    Print ISSN: 0036-8075
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  • 8
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    Gated sodium-23 nuclear magnetic resonance images of an isolated perfused working rat heart (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-22
    Description: Sodium-23 nuclear magnetic resonance images of phantoms and gated images of isolated perfused working rat hearts were obtained. By synchronizing the nuclear magnetic resonance process to the heartbeat, images were obtained at systole and at diastole.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeLayre, J L -- Ingwall, J S -- Malloy, C -- Fossel, E T -- HL 22542/HL/NHLBI NIH HHS/ -- HL 26215/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 May 22;212(4497):935-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233188" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Diastole ; In Vitro Techniques ; Magnetic Resonance Spectroscopy/*methods ; Models, Structural ; *Myocardial Contraction ; Rats ; Sodium ; Systole
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  • 9
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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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  • 10
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    Entorhinal and septal inputs differentially control sensory-evoked responses in the rat dentate gyrus (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-13
    Description: Averaged sensory-evoked potentials were recorded from the outer molecular layer of the dentate gyrus in naive rats and in rats conditioned to respond in the presence of an auditory stimulus. Two components (negative peaks) of the potentials were functionally distinguished in terms of responsiveness to unique or conditioned auditory stimuli. Each component was independently generated by a separate input pathway to the dentate gyrus: The perforant path provided an "insignificance" or "unexpected" feature of the sensory stimulus when appropriate, and the septum controlled the development of a second component as a function of the behavioral significance of the stimulus during the acquisition of auditory discrimination behavior. A reciprocal relationship between the peak amplitudes of both components of the average evoked potentials dependent on the relative behavioral significance of the sensory stimulus was observed in all animals during extinction and reconditioning of the sensory discrimination task. The findings indicate that the entorhinal and septal projections to the dentate granule cells are activated differentially by sensory stimuli as a function of their acquired behavioral significance to the animal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deadwyler, S A -- West, M O -- Robinson, J H -- New York, N.Y. -- Science. 1981 Mar 13;211(4487):1181-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466392" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Auditory Perception/physiology ; Discrimination Learning/*physiology ; Evoked Potentials ; Hippocampus/cytology/*physiology ; Male ; Neural Pathways/physiology ; Rats ; Septal Nuclei/cytology/*physiology
    Print ISSN: 0036-8075
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  • 11
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    Body weight and composition in laboratory rats: effects of diets with high or low protein concentrations (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-09
    Description: Adult rats fed high concentrations of dietary protein for 9 weeks gained more weight than rats fed isoenergetic diets containing less protein. There were no significant differences in tail and body lengths among several groups of rats on diets containing different amounts of protein; however, total body fat was significantly greater in the rats fed on diets containing 25 percent protein compared to the rats fed 5 percent protein diets. These findings suggest that the role of dietary protein in obesity and other conditions deserves further scrutiny.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Donald, P -- Pitts, C C -- Pohl, S L -- AM05955/AM/NIADDK NIH HHS/ -- AM22125/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 9;211(4478):185-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444462" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Animals, Laboratory ; *Body Composition ; *Body Weight ; Dietary Proteins/*metabolism ; Energy Intake ; Obesity/metabolism ; Rats
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  • 12
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    Toxicity, odor aversion, and "olfactory aposematism" (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eisner, T -- Grant, R P -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):476.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Odors ; Rats ; Smell ; *Toxicology
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  • 13
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    Renin and angiotensin: the complete system within the neuroblastoma x glioma cell (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-20
    Description: Cells of the homogeneous hybrid line neuroblastoma x glioma (NG108-15) have many neuronal properties. Immunocytochemical tests show that they contain both immunoreactive renin and angiotensin; direct radioimmunoassays show that they are positive for renin, angiotensin I, and angiotensin II; enzymatic assays show that they contain angiotensinogen and converting enzyme as well. The renin appears to be present in an enzymatically inactive form that can be activated by trypsin and then blocked by antiserum to purified mouse submaxillary renin. Renin concentration and activity are increased by enhancing cellular differentiation with dibutyryl cyclic adenosine monophosphate or by serum withdrawal. These findings demonstrate a complete renin-angiotensin system within these neuron-like cells, and suggest that activation of intracellular renin could generate angiotensin II.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fishman, M C -- Zimmerman, E A -- Slater, E E -- HL-21247/HL/NHLBI NIH HHS/ -- HL-24105/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):921-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272392" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin I/*analysis ; Angiotensin II/*analysis ; Angiotensins/*analysis ; Animals ; Cell Line ; Cricetinae ; Glioma/*metabolism ; Hybrid Cells/*metabolism ; Mice ; Neuroblastoma/*metabolism ; Peptidyl-Dipeptidase A/metabolism ; Radioimmunoassay ; Rats ; Renin/*metabolism
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  • 14
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    Increased intracranial self-stimulation in rats after long-term administration of desipramine (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: The effects of long- and short-term administration of the tricyclic antidepressant desipramine on intracranial self-stimulation in rats were studied with electrodes in the A10 region of the dopamine-containing cell bodies of the ventromedial tegmentum. Long-term desipramine administration resulted in a significant shift to the left in the ascending portion of the rate--current intensity function, indicating that the activity of the mesolimbic dopamine system was enhanced. These findings point to a possible dopaminergic mechanism of action of antidepressants and support speculations concerning the role of dopamine-containing neurons in the pathophysiology of depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fibiger, H C -- Phillips, A G -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):683-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7197394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Depression/physiopathology ; Desipramine/*administration & dosage ; Dopamine/*physiology ; Humans ; Limbic System/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Self Stimulation/*drug effects ; Time Factors
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  • 15
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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
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  • 16
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    Novel single-pass exchange of circulating uridine in rat liver (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-14
    Description: Evidence is presented that the liver effects an essentially complete degradation of plasma uridine in a single pass and replaces it largely from hepatic pools of acid-soluble uridine nucleotides. The concentration of uridine in the hepatic vein of the rat was essentially the same as that in the arterial circulation and portal vein. However, the isolated perfused rat liver degraded more than 90 percent of infused [5-3H]uridine in a single passage. Similar results were found in vivo when tracer amounts of [3H]uridine and [14C]uridine were infused into the portal vein of an intact rat. Furthermore, less than 2 percent of the infused uridine entered the acid-soluble nucleotide pools of the liver after 30 minutes of infusion. Intraperitoneal injection of [3H]orotate allowed selective labeling of liver (and kidney) pyrimidines. After 3 hours, the specific activity of uridine in the hepatic vein was more than three times that in the arterial circulation. This unusual exchange, which is not saturated even at uridine concentrations as high as 50 microM, contributes to the rapid turnover of plasma uridine and explains its inefficient utilization in peripheral tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gasser, T -- Moyer, J D -- Handschumacher, R E -- New York, N.Y. -- Science. 1981 Aug 14;213(4509):777-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256279" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Liver/*metabolism ; Metabolic Clearance Rate ; Rats ; Tissue Distribution ; Uridine/blood/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Rapid massive assembly of tight junction strands (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: Incubation at 37 degrees C of excised rat prostate tissue results in massive proliferative assembly of new tight junction strands along the entire lengths of the lateral plasma membranes of the columnar epithelial cells. The new tight junction elements are assembled within 5 minutes and have an average length six times that of those present in the apical tight junction band. Massive assembly occurs in the presence of protein synthesis inhibitors (cycloheximide) or of metabolic uncouplers (dinitrophenol). Thus, proliferative assembly of tight junction strands involves molecular reorganization from a pool of preexisting, probably membrane-associated, components. The fascia occludens and some examples of experimentally induced tight junction proliferation may reflect the massive emergence of tight junction strands when tissue is subjected to diverse stressful conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kachar, B -- Pinto da Silva, P -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):541-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244652" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cycloheximide/pharmacology ; Dinitrophenols/pharmacology ; Intercellular Junctions/drug effects/*physiology/ultrastructure ; Male ; Prostate/physiology/ultrastructure ; Rats
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  • 18
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    Multiple opiate receptors: alcohol selectively inhibits binding to delta receptors (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-23
    Description: The addition of ethanol or other aliphatic alcohols to rat brain membranes strongly inhibits binding of enkephalins at concentrations at which little inhibition of opiate alkaloids is seen. Inhibition is reversible, and potency increases with chain length of the alcohol. The results suggest that delta receptors are considerably more sensitive to alcohols than mu receptors. This is the first demonstration of selective inhibition of one of the postulated classes of opiate receptors by a reagent that is not a ligand for the receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hiller, J M -- Angel, L M -- Simon, E J -- DA-00017/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):468-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6270788" target="_blank"〉PubMed〈/a〉
    Keywords: Alcohols/*pharmacology ; Animals ; Brain/metabolism ; Cells, Cultured ; In Vitro Techniques ; Neuroblastoma/metabolism ; Rats ; Receptors, Opioid/classification/*drug effects/metabolism ; Structure-Activity Relationship
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  • 19
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    Insulin as a potent, specific growth factor in a rat hepatoma cell line (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-27
    Description: A line or rat hepatoma cells in culture which, in response to serum starvation, become arrested in the early G1 phase of growth, can be stimulated by insulin alone to enter the cell cycle and traverse S phase. A half-maximum response is observed at 30 to 70 picomolar concentrations and the maximum response is essentially identical to that found with optimum serum concentrations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koontz, J W -- Iwahashi, M -- AM 24047/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):947-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7008195" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle/drug effects ; Cell Division/drug effects ; Cell Line ; *Growth Substances ; Insulin/*pharmacology ; Liver Neoplasms, Experimental/*pathology ; Mitosis/drug effects ; Proinsulin/pharmacology ; Rats ; Structure-Activity Relationship
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  • 20
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    Steady-state relationship of calcium-45 between bone and blood: differences in growing dogs, chicks, and rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-09
    Description: In young animals that had received multiple doses of calcium-45, a constant ratio of calcium-45 specific activity in blood to that in bone was found in growing dogs and chicks but not in rats. This steady-state relationship of calcium-45 between bone and blood suggests that during growth in dogs and chicks most of the skeletal calcium is in an active state of turnover. In growing rats, after the first 2 weeks of life, the blood/bone ratio of calcium-45 decreases due to a decrease in bone resorption.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klein, L -- AG-00258/AG/NIA NIH HHS/ -- AG-00361/AG/NIA NIH HHS/ -- DE-05487/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):190-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6792709" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Bone Development ; Bone Resorption/drug effects ; Bone and Bones/*metabolism ; Calcium/blood/*metabolism ; Calcium Radioisotopes ; Chickens ; Dogs ; Etidronic Acid/pharmacology ; Homeostasis ; Rats ; Tetracycline/metabolism
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  • 21
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    Dietary restriction retards the age-associated loss of rat striatal dopaminergic receptors (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-30
    Description: In male Wistar rats subjected to dietary restriction by alternate days of feeding and fasting the normal age-associated loss of striatal dopamine receptors in the brain was substantially retarded. The mean survival time of the rats on the restricted diet was increased by approximately 40 percent compared to control rats given free access to food. Dopamine receptor concentrations in striata of 24-month-old rats that had been on a restricted diet since weaning were 50 percent higher than those of control animals of the same age, and essentially comparable to 3- and 6-month-old control rats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levin, P -- Janda, J K -- Joseph, J A -- Ingram, D K -- Roth, G S -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):561-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291993" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Corpus Striatum/*metabolism ; *Diet ; Fasting ; Rats ; Rats, Inbred Strains ; Receptors, Dopamine/*metabolism
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  • 22
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    Modulation of parallel fiber excitability by postsynaptically mediated changes in extracellular potassium (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-16
    Description: Field potentials and extracellular potassium concentration ([K+]o) were simultaneously monitored in the molecular layer of the rat cerebellar cortex during stimulation of the parallel fibers. The synaptic field potential elicited by stimulation was reduced by several methods. Reduction of synaptic field potentials was accompanied by a marked increase in the excitability of the parallel fibers. This change in excitability was related to the degree of extracellular K+ accumulation associated with parallel fiber stimulation. These findings support the proposal that increases in [K+]o associated with activity in postsynaptic elements can modulate the excitability of presynaptic afferent fibers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Malenka, R C -- Kocsis, J D -- Ransom, B R -- Waxman, S G -- NS 15589/NS/NINDS NIH HHS/ -- NS-00473/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 16;214(4518):339-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280695" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways/*physiology ; Animals ; Calcium/physiology ; Cerebellar Cortex/*physiology ; Evoked Potentials ; Extracellular Space/physiology ; Male ; Manganese/pharmacology ; Membrane Potentials ; Potassium/*physiology ; Rats ; Rats, Inbred Strains ; Synapses/*physiology
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  • 23
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    Quantitation of sprouting of dorsal root axons (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-28
    Description: The axonal sprouting that occurs after denervation resulting from a spinal hemisection can be quantified. Rats were subjected to hemisection of the spinal cord at birth, and the myelinated and unmyelinated axons in dorsal roots three segments cranial and three segments caudal to the lesion were counted 1 month after surgery. The number of unmyelinated axons in the dorsal root on the side of the hemisection increased 22 percent for the roots one segment from the lesion and 13 percent for the roots two and three segments from the lesion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hulsebosch, C E -- Coggeshall, R E -- NS 06246/NS/NINDS NIH HHS/ -- NS 10161/NS/NINDS NIH HHS/ -- NS 11255/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):1020-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268404" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/ultrastructure ; Ganglia, Spinal/*cytology/physiology ; Nerve Fibers, Myelinated/ultrastructure ; *Nerve Regeneration ; Rats ; Spinal Cord Injuries
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  • 24
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    Regenerating axons reclaim sensory targets from collateral nerve sprouts (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-20
    Description: There is a critical period for the sprouting of intact low-threshold mechanosensory cutaneous nerves in rats; functional invasion of adjacent denervated skin does not occur in animals older than about 20 days of age, and it is largely confined to denervated skin within the "domain" of the parent dermatome. These nerves can regenerate readily in the adult, however, and such regenerating nerves do not respect domain borders; moreover, they functionally displace endings of intact nerves that earlier had sprouted into denervated skin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jackson, P C -- Diamond, J -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):926-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302568" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Axons/*physiology ; Mechanoreceptors/*physiology ; *Nerve Regeneration ; Nociceptors/physiology ; Rats ; Skin/growth & development/*innervation
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  • 25
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    Calcitonin messenger RNA encodes multiple polypeptides in a single precursor (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-24
    Description: Recombinant DNA techniques were used to analyze the structure of the messenger RNA encoding a precursor of calcitonin, a small calcium-regulating hormone of 32 amino acids. Analyses of the nucleotide sequences of cloned complementary DNA's comprising the entire coding sequence of the messenger RNA revealed that calcitonin is flanked at both its amino and carboxyl termini by peptide extensions linked to the hormone by short sequences of basic amino acids. The location of glycine next to the carboxyl terminal prolinamide of calcitonin is consistent with indications that glycine is required for the enzymatic amidation of proline to the prolinamide. During cellular biosynthesis, calcitonin arises from a large precursor protein by cleavages at both amino and carboxyl terminal residues of the hormone. These findings raise questions concerning the regulation of these cleavages and the potential biological functions of the precursor extensions derived from these cleavages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacobs, J W -- Goodman, R H -- Chin, W W -- Dee, P C -- Habener, J F -- Bell, N H -- Potts, J T Jr -- AM 27781-01/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):457-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264603" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Calcitonin/*genetics ; Cloning, Molecular ; DNA Restriction Enzymes ; DNA, Recombinant/*metabolism ; Macromolecular Substances ; Neoplasms, Experimental/metabolism ; Nucleic Acid Hybridization ; Peptide Biosynthesis ; Plants/metabolism ; Protein Biosynthesis ; RNA, Messenger/*genetics ; Rats ; Thyroid Neoplasms/metabolism ; Triticum/metabolism
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  • 26
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    Natriuretic hormone linked to hypertension (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1255-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6262915" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Humans ; Hypertension/*etiology ; *Natriuresis ; Natriuretic Agents ; Proteins/*physiology ; Rats ; Sodium/metabolism ; Sodium-Potassium-Exchanging ATPase/metabolism
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  • 27
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    Electroconvulsive shock increases tyrosine hydroxylase activity in the brain and adrenal gland of the rat (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-06
    Description: A single application of electroconvulsive shock produced a rapid but short-lasting increase in tyrosine hydroxylase activity above control values in the rat adrenal medulla and striatum. After repeated electroconvulsive shock treatment (once per day for 7 days), tyrosine hydroxylase activity increased significantly in the locus ceruleus, nucleus of the tractus solitarius, hippocampus, cerebellum, and frontal cortex and remained elevated for 4 to 8 days. Adrenal tyrosine hydroxylase activity increased 1 day after the termination of repeated electroconvulsive shock treatments and remained elevated for at least 24 days, possibly reflecting the establishment of a new and higher steady-state level of catecholamine biosynthesis in the adrenal. These findings suggest that the persistent changes in tyrosine hydroxylase activity produced by repeated electroconvulsive shock may be a factor contributing to the long-lasting antidepressant effects of this treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masserano, J M -- Takimoto, G S -- Weiner, N -- NS 07927/NS/NINDS NIH HHS/ -- NS 09199/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):662-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117127" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/*enzymology ; Animals ; Brain/*enzymology ; Corpus Striatum/enzymology ; *Electroshock ; Enzyme Induction ; Locus Coeruleus/enzymology ; Male ; Rats ; Rats, Inbred Strains ; Time Factors ; Tyrosine 3-Monooxygenase/*metabolism
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  • 28
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    Stimulation of intestinal calcium transport and bone calcium mobilization by prolactin in vitamin D-deficient rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-27
    Description: In vitamin D-deficient rats intestinal calcium transport increased significantly 4 hours after an injection of prolactin, reached a maximum after 8 hours, and declined to preinjection levels after 24 hours. Similarly, in vitamin D-deficient rats fed a diet low in calcium or phosphorus prolactin stimulated an increase in serum calcium in both groups and an increase in serum phosphorus in the rats fed the diet low in phosphorus. Thus it appears that prolactin affects organs involved in calcium regulation in a manner that is independent of the vitamin D endocrine system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pahuja, D N -- DeLuca, H F -- AM-14881/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 27;214(4524):1038-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302575" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone and Bones/drug effects/*metabolism ; Calcium/*metabolism ; Intestinal Absorption/*drug effects ; Intestine, Small/drug effects/*metabolism ; Male ; Prolactin/*pharmacology ; Rats ; Vitamin D Deficiency/*metabolism
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  • 29
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    Immunohistochemical demonstration of a testicular substance related to luteinizing hormone-releasing hormone (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-11
    Description: A substance related to luteinizing hormone-releasing hormone was demonstrated, by immunohistochemical procedures, in the cytoplasm of interstitial cells within the rat testes. In many seminiferous tubules, nuclei of spermatogonial cells were also immunopositive. Both cytoplasmic and nuclear fractions of testicular homogenates contain immunoreactive compounds, and this report identifies which cell types contain this substance. The localization of a peptide hormone within the nucleus of a target cell population may indicate its mode of action.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paull, W K -- Turkelson, C M -- Thomas, C R -- Arimura, A -- HD14761/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 11;213(4513):1263-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7022653" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Specificity ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; Gonadotropin-Releasing Hormone/immunology/*metabolism ; Humans ; Immunologic Techniques ; Leydig Cells/metabolism ; Male ; Rats ; Spermatogonia/metabolism ; Testis/*metabolism
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  • 30
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    Thymosin stimulates secretion of luteinizing hormone-releasing factor (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-06
    Description: Partially purified thymosin fraction 5 and one of its synthetic peptide components, thymosin beta 4, but not thymosin alpha 1, stimulated secretion of luteinizing hormone--releasing factor from superfused medial basal hypothalami from random cycling female rats. In addition, luteinizing hormone was released from pituitary glands superfused in sequence with hypothalami. No release of luteinizing hormone in response to thymosin was observed from pituitaries superfused alone. These data provide the first evidence of a direct effect of the endocrine thymus on the hypothalamus and suggest a potentially important role for thymic peptides in reproductive function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rebar, R W -- Miyake, A -- Low, T L -- Goldstein, A L -- AG-01531/AG/NIA NIH HHS/ -- HD-12303/HD/NICHD NIH HHS/ -- HD-14362/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):669-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7027442" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Gonadotropin-Releasing Hormone/*secretion ; Hormones/pharmacology ; Hypothalamo-Hypophyseal System/drug effects ; Hypothalamus/*drug effects ; Peptide Fragments/pharmacology ; Rats ; Structure-Activity Relationship ; Thymosin/*pharmacology ; Thymus Hormones/*pharmacology
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    Medical therapies for mood disorders alter the blood-brain barrier (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-24
    Description: The effects of amitriptyline, lithium, and electroconvulsive shock on cerebral permeability and blood flow were tested. These three treatments share in common (i) the ability to influence the functional activity of central adrenergic neurons by way of effects on the release, reuptake, or metabolism of norepinephrine and (ii) therapeutic efficacy in mood disturbances. Under control conditions, cerebral permeability increases linealy with increasing arterial partial pressure of carbon dioxide and hence cerebral blood flow. All three treatments altered this relationship in a manner consistent with their adrenergic effects. Amitriptyline potentiated this increase in cerebral permeability whereas lithium and electroconvulsive shock blunted this phenomenon. These results support the hypothesis that one function of central adrenergic neurons is regulation of the blood-brain barrier and raise the possibility that a related effect may underlie the clinical usefulness of such treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Preskorn, S H -- Irwin, G H -- Simpson, S -- Friesen, D -- Rinne, J -- Jerkovich, G -- GM15956/GM/NIGMS NIH HHS/ -- MH-00272/MH/NIMH NIH HHS/ -- NS17252/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):469-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244645" target="_blank"〉PubMed〈/a〉
    Keywords: Amitriptyline/*pharmacology ; Animals ; Blood-Brain Barrier/*drug effects ; Brain/drug effects/*metabolism ; Electroshock ; Lithium/*pharmacology ; Male ; Rats ; Regional Blood Flow/drug effects
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  • 32
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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)
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    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
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  • 33
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    Morphine-induced attenuation of morphine tolerance (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-26
    Description: Rats experienced both morphine and an environmental cue, but the cue always signaled a drug-free period. They were subsequently administered morphine in the presence of the cue, and the development of analgesic tolerance was assessed. The prior experience retarded such tolerance. The finding that a procedure of opiate administration can retard opiate tolerance suggests that an association between cues preceding the drug and the drug itself contributes to tolerance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Siegel, S -- Hinson, R E -- Krank, M D -- DA-01200/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1533-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233244" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Conditioning, Operant/*drug effects ; Drug Tolerance ; Light ; Morphine/*pharmacology ; Rats
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    Pentobarbital: dual actions to increase brain benzodiazepine receptor affinity (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-27
    Description: The binding of [3H]diazepam to benzodiazepine receptors was studied in extensively washed membranes of rat cerebral cortex in the presence of the depressant barbiturate, pentobarbital. Pentobarbital, like the endogenous neurotransmitter gamma-aminobutyric acid (GABA), increased the basal binding and also potentiated the GABA-enhanced binding of [3H]diazepam to benzodiazepine receptors by increasing the apparent affinity of [3H]diazepam for the benzodiazepine receptor. The concentrations of pentobarbital necessary to elicit these effects in vitro are the same as those observed after treatment with pharmacologically relevant doses, suggesting that a common neurochemical association may exist between these types of compounds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skolnick, P -- Moncada, V -- Barker, J L -- Paul, S M -- New York, N.Y. -- Science. 1981 Mar 27;211(4489):1448-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6258230" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cerebral Cortex/drug effects ; Chlorides/metabolism ; Diazepam/metabolism ; Male ; Pentobarbital/*pharmacology ; Rats ; Receptors, Drug/*drug effects/metabolism ; Receptors, GABA-A ; Stimulation, Chemical ; gamma-Aminobutyric Acid/pharmacology
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    Studies in histocompatibility (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snell, G D -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):172-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017931" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Antigens, Neoplasm/genetics ; Antigens, Viral/genetics ; Antigens, Viral, Tumor ; Female ; Genetic Linkage ; Genotype ; H-2 Antigens/genetics ; Heterozygote ; *Major Histocompatibility Complex ; Male ; Mice ; Mice, Inbred Strains ; Neoplasms, Experimental/genetics/*immunology ; Pedigree ; Rats ; Species Specificity
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    Bee venom enhances guanylate cyclase activity (1981)
    American Association for the Advancement of Science (AAAS)
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    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
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  • 37
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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)
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    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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    Angiotensin II binding sites in rat brain (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van Houten, M -- Posner, B I -- New York, N.Y. -- Science. 1981 Dec 18;214(4527):1376.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6274018" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin II/metabolism ; Animals ; Brain/metabolism ; Rats ; Receptors, Angiotensin/*metabolism ; Receptors, Cell Surface/*metabolism
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  • 39
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    Hormonal requirements for growth of arterial smooth muscle cells in vitro: and endocrine approach to atherosclerosis (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-15
    Description: In this study the hormonal requirements for the growth of arterial smooth muscle cells in vitro were determined. A serum-free, biochemically defined medium, supplemented with the relevant hormones, permitted proliferation and propagation of normal diploid mammalian arterial smooth muscle cells. Serum-free, hormone-supplemented cultures spontaneously formed atherosclerotic plaque-like nodules. Thus atherosclerosis may be mediated by a complex endocrine system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weinstein, R -- Stemerman, M B -- Maciag, T -- AM 07026/AM/NIADDK NIH HHS/ -- HL 06197/HL/NHLBI NIH HHS/ -- HL 07374/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 May 15;212(4496):818-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7013068" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta, Abdominal/cytology ; Cell Division/drug effects ; Cells, Cultured ; Culture Media ; Growth Substances/pharmacology ; Hormones/*pharmacology ; Insulin/pharmacology ; Muscle, Smooth, Vascular/*cytology ; Rats ; Transferrin/pharmacology
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  • 40
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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)
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    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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    Novel peptide neuronal system in rat brain and pituitary (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-12-11
    Description: Immunohistofluorescence studies of the rat central nervous system with antibodies to Phe-Met-Arg-Phe-NH2 (molluskan cardioexcitatory peptide) revealed a widespread neuronal system in the brain, spinal cord, and posterior pituitary. Immunoreactive axons and cell bodies were mainly located in cortical, limbic, and hypothalamic areas. Immunostaining of serial sections of the brain and pituitary showed that the Phe-Met-Arg-Phe-NH2 immunoreactive neurons were different from neurons labeled by antibodies to either Met-enkephalin or the putative Met-enkephalin precursor Tyr-Gly-Gly-Phe-Met-Arg-Phe, which is structurally related to Phe-Met-Arg-Phe-NH2. Control staining by antiserum absorption and radioimmunoassay indicated that the antibodies that caused the specific immunofluorescence recognized peptides with an amidated Arg-Phe sequence at the carboxyl terminus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weber, E -- Evans, C J -- Samuelsson, S J -- Barchas, J D -- DA 01207/DA/NIDA NIH HHS/ -- MH 23861/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1248-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7029714" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/analysis ; *Brain Chemistry ; FMRFamide ; Fluorescent Antibody Technique ; Nerve Tissue Proteins/*analysis ; Neurons/*analysis ; Organ Specificity ; Pituitary Gland/*analysis ; Radioimmunoassay ; Rats ; Spinal Cord/*analysis
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    Intrinsic birefringence signal preceding the onset of contraction in heart muscle (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-07
    Description: An intrinsic birefringence signal with two components occurring before sarcomere shortening was measured in mammalian cardiac muscle. The second component was sensitive to the inotropic state of the muscle as affected by external calcium concentration and epinephrine but not by changes of resting length. The second component was absent in frog heart. These results suggest that the second component of the birefringence signal reflects the activity of the sarcoplasmic reticulum related to excitation-contraction coupling processes occurring prior to onset of contraction in mammalian cardiac muscle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, R -- Morad, M -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):663-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256266" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Birefringence ; Calcium/*physiology ; Cats ; Guinea Pigs ; Heart/*physiology ; Intracellular Membranes/physiology ; *Myocardial Contraction ; Rats ; Sarcoplasmic Reticulum/*physiology ; Time Factors
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    Prenatal exposure to ethanol alters the organization of hippocampal mossy fibers in rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-02-27
    Description: Rats exposed to ethanol throughout their gestation were found to have abnormally distributed mossy fibers in temporal regions of the hippocampus. This demonstrates that prenatal exposure to ethanol causes alterations in neuronal circuitry that persist to maturity. Such defects may play a role in the mental retardation often observed in children with fetal alcohol syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉West, J R -- Hodges, C A -- Black, A C Jr -- AA-03884/AA/NIAAA NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):957-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466371" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced/*etiology ; Animals ; Ethanol/*pharmacology ; Female ; Hippocampus/abnormalities/drug effects/*embryology ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats
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    Ethanol tolerance in the rat is learned (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: Rats were trained to walk on a treadmill to avoid foot shock. The animals developed tolerance for ethanol if given subsequent practice while ethanol intoxicated. Rats given equivalent doses of ethanol after practice did not develop tolerance, nor did saline-treated controls. These results challenge the hypothesis that mere repeated doses of ethanol are sufficient to induce tolerance. It seems that tolerance does not develop unless the response used to measure tolerance is performed while the subject is intoxicated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wenger, J R -- Tiffany, T M -- Bombardier, C -- Nicholls, K -- Woods, S C -- 03504/PHS HHS/ -- AA 04658/AA/NIAAA NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):575-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244656" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/*drug effects ; Dose-Response Relationship, Drug ; Drug Tolerance ; Ethanol/blood/*pharmacology ; Rats
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    Thyroidectomy increases rat hepatic ferritin iron (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Winkelmann, J C -- Mariash, C N -- Towle, H C -- Oppenheimer, J H -- AM00800/AM/NIADDK NIH HHS/ -- AM19812/AM/NIADDK NIH HHS/ -- AM26919/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):569-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6166047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ferritins/*metabolism ; Hypothyroidism/metabolism ; Iron/*metabolism ; Liver/*metabolism ; Molecular Weight ; Orotic Acid/metabolism ; Polyribosomes/metabolism ; RNA/genetics ; Rats ; *Thyroidectomy
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    Evaluation of nitrate synthesis by intestinal microorganisms in vivo (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-24
    Description: The nitrate balance of germfree and conventional rats was assessed to determine whether the intestinal flora produces nitrate in vivo. The results indicate that there can be excess nitrate in the urine of germfree as well as conventional rats. This nitrate is apparently of host origin, and the presence of intestinal flora decreases the output of nitrate in urine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Witter, J P -- Gatley, S J -- Balish, E -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):449-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244641" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Germ-Free Life ; Glucose/metabolism ; Intestines/*microbiology ; Nitrates/*metabolism ; Oxidation-Reduction ; Rats
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    Drug discrimination learning in lead-exposed rats (1981)
    American Association for the Advancement of Science (AAAS)
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    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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    Carbamoyl phosphate synthetase (glutamine-hydrolyzing): increased activity in cancer cells (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-04-24
    Description: The specific activity of carbamoyl phosphate synthetase (glutamine-hydrolyzing), the first and rate-limiting enzyme of de novo uridine 5'-triphosphate biosynthesis, was increased in 13 transplantable hepatomas, particularly in the rapidly growing tumors (5.7- to 9.5-fold), and the rise was correlated with tumor growth rates. Thus, synthetase activity was linked with both hepatic neoplastic transformation and progression. Synthetase specific activity was so elevated in a transplantable sarcoma (18-fold) and a kidney adenocarcinoma (5-fold). The increased activity should enhance the capacity of the pathway and should confer selective advantages to cancer cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aoki, T -- Weber, G -- CA-05034/CA/NCI NIH HHS/ -- CA-13526/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 24;212(4493):463-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209543" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/enzymology ; Animals ; Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)/*metabolism ; Cell Differentiation ; Kidney Neoplasms ; Ligases/*metabolism ; Liver/enzymology ; Liver Neoplasms, Experimental/*enzymology/pathology ; Liver Regeneration ; Neoplasm Transplantation ; Rats ; Sarcoma, Experimental/enzymology
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    Suckling infant rats learn a preference for a novel olfactory stimulus paired with milk delivery (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-30
    Description: When presented a novel olfactory stimulus while suckling a passive dam, 11- to 14-day-old rat pups acquire a conditioned preference for that stimulus. The magnitude of the conditioned preference is greater if the pups received milk while suckling than if they did not. The results indicate that infants are capable of learning while suckling and that milk delivery plays a role in this associative process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brake, S C -- MH 32429/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):506-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7192882" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Population Groups/*physiology ; Animals ; Animals, Suckling/*physiology ; Association Learning/physiology ; Behavior, Animal/*physiology ; Conditioning (Psychology) ; Female ; *Lactation ; Pregnancy ; Rats ; Smell
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    Exposure of rats to alcohol in utero alters drug sensitivity in adulthood (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-26
    Description: Pregnant rats were intubated with alcohol (ethanol, 3 grams per kilogram) twice daily throughout gestation. Control animals received solutions of isocaloric sucrose. At birth, offspring were placed with untreated surrogate dams. Beginning at 6 months of age, the offspring were tested for their thermogenic responsiveness to various drugs and to cold. Prenatal exposure to alcohol resulted in tolerance to alcohol and cross-tolerance to pentobarbital and diazepam but did not affect responsiveness to cold. This pattern of effects suggest that prenatal exposure to alcohol produces specific long-term effects on the neural mechanisms underlying drug tolerance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abel, E L -- Bush, R -- Dintcheff, B A -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1531-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233243" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chlorpromazine/pharmacology ; Dextroamphetamine/pharmacology ; Diazepam/pharmacology ; Drug Hypersensitivity ; Drug Tolerance ; Ethanol/*pharmacology ; Female ; Fetus/*drug effects ; Morphine/pharmacology ; Pentobarbital/pharmacology ; Pregnancy ; Rats
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    Cyclophosphamide-induced spermatogenic effects detected in the F1 generation by behavioral testing (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-02
    Description: Fischer 344 male rats were treated with cyclophosphamide (10 milligrams per kilogram of body weight) for 5 weeks and subsequently mated to females previously treated with saline or cyclophosphamide. The F1 progeny of the cyclophosphamide-treated males exhibited behavior deficits when compared to controls. These data could indicate a chemically induced genetic effect manifested by behavioral alterations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adams, P M -- Fabricant, J D -- Legator, M S -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):80-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444453" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning ; Behavior, Animal/*physiology ; Cyclophosphamide/*pharmacology ; Female ; Locomotion ; Male ; Motor Activity ; Mutation ; Rats ; Spermatogenesis/*drug effects
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    In vivo carbon-13 nuclear magnetic resonance studies of mammals (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: Natural abundance carbon-13 nuclear magnetic resonances (NMR) from human arm and rat tissues have been observed in vivo. These signals arise primarily from triglycerides in fatty tissue. Carbon-13 NMR was also used to follow, in a living rat, the conversion of C-1-labeled glucose, which was introduced into the stomach, to C-1-labeled liver glycogen. The carbon-13 sensitivity and resolution obtained shows that natural abundance carbon-13 NMR will be valuable in the study of disorders in fat metabolism, and that experiments with substrates labeled with carbon-13 can be used to study carbohydrate metabolism in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alger, J R -- Sillerud, L O -- Behar, K L -- Gillies, R J -- Shulman, R G -- Gordon, R E -- Shae, D -- Hanley, P E -- AM27121/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):660-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292005" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/drug effects ; Animals ; Carbon/*metabolism ; Carbon Isotopes ; Glucose/metabolism ; Humans ; Liver Glycogen/metabolism ; Magnetic Resonance Spectroscopy/*methods ; Models, Structural ; Rats ; Time Factors
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    Sodium pump in skeletal muscle: central nervous system-induced suppression by alpha-adrenoreceptors (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Akaike, N -- New York, N.Y. -- Science. 1981 Sep 11;213(4513):1252-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6267696" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport, Active ; Catecholamines/physiology ; Decerebrate State ; Hypokalemia/*metabolism ; Male ; Muscle Denervation ; Muscles/*metabolism ; Potassium/metabolism ; Rats ; Receptors, Adrenergic/*physiology ; Receptors, Adrenergic, alpha/*physiology ; Sodium/metabolism ; Sodium-Potassium-Exchanging ATPase/*metabolism
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    Vaginocervical stimulation selectively increases metabolic activity in the rat brain (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-06
    Description: Vaginocervical stimulation affects progesterone secretion, sperm transport, sexual receptivity, locomotion, and perception of pain in female rats. In this experiment, vaginocervical stimulation produced statistically significant increases in the metabolic uptake of carbon-14-labeled 2-deoxy-D-glucose in the following brain areas (ordered by magnitude of uptake): medial preoptic, mesencephalic reticular formation, bed nucleus of stria terminalis, dorsal raphe, and globus pallidus. The results provide information about the concurrent processing of sensory stimulation by several neural areas and indicate that the medial preoptic area is a receiving area for copulatory stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Allen, T O -- Adler, N T -- Greenberg, J H -- Reivich, M -- HD 04522/HD/NICHD NIH HHS/ -- I T32 MH 15092/MH/NIMH NIH HHS/ -- NS 10939-08/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1070-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466382" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; Cervix Uteri/*innervation ; *Copulation ; Deoxyglucose/metabolism ; Female ; Glucose/*metabolism ; Physical Stimulation ; Preoptic Area/metabolism ; Rats ; Vagina/*innervation
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    Dye transfer through gap junctions between neuroendocrine cells of rat hypothalamus (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-13
    Description: Most magnocellular neurosecretory cells that terminate in the posterior pituitary secrete either vasopressin, oxytocin, or enkephalin. Intracellular injection of the fluorescent dye Lucifer Yellow into single magnocellular neurons in slices of rat hypothalamus resulted in dye transfer between these cells. Freeze-fracture replicas of these cells occasionally revealed gap junctions, which presumably contain channels that mediate the dye coupling. These two independent techniques strongly suggest that some mammalian neuropeptidergic cells are electrotonically coupled, providing a possible means for recruitment and synchronization of their electrical activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Andrew, R D -- MacVicar, B A -- Dudek, F E -- Hatton, G I -- NS 01940/NS/NINDS NIH HHS/ -- NS 16683/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 13;211(4487):1187-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466393" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Communication ; Fluorescent Dyes ; Freeze Fracturing ; Hypothalamus/*physiology/ultrastructure ; Intercellular Junctions/*physiology ; Paraventricular Hypothalamic Nucleus/physiology ; Rats ; Supraoptic Nucleus/physiology
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    Adenosine 3',5'-monophosphate modulates thyrotropin receptor clustering and thyrotropin activity in culture (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-11
    Description: A biologically active rhodamine conjugate of thyrotropin binds at 4 degrees C to diffusely distributed membrane thyrotropin receptors which patch and become endocytosed into thyroid cells in a temperature-sensitive process. When the cells are first incubated with 8-bromo-cyclic adenosine monophosphate at 37 degrees C, the conjugate also binds to clustered receptors at 4 degrees C. Furthermore, 8-bromo-cyclic adenosine monophosphate reduces the amount of adenosine 3',5'-monophosphate (cyclic AMP) induced by thyrotropin. Hence, increased intracellular cyclic AMP induces receptor patching and reduces the concentration of cyclic AMP normally induced by thyrotropin. This suggests that cyclic AMP acts both as the second messenger of thyrotropin and also as the regulator of the level of thyrotropin receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Avivi, A -- Tramontano, D -- Ambesi-Impiombato, F S -- Schlessinger, J -- CA-25820/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1237-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272396" target="_blank"〉PubMed〈/a〉
    Keywords: 8-Bromo Cyclic Adenosine Monophosphate ; Animals ; Cell Line ; Cell Membrane/drug effects/metabolism ; Cyclic AMP/*analogs & derivatives/*metabolism/pharmacology ; Rats ; Receptors, Cell Surface/drug effects/*metabolism ; Receptors, Thyrotropin ; Thyroid Gland/metabolism ; Thyrotropin/*metabolism/pharmacology
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    Endogenous opiates and stress-induced eating (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Antelman, S M -- Rowland, N -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1149-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302588" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Endorphins/*physiology ; Feeding Behavior/drug effects/*physiology ; Humans ; Naloxone/pharmacology ; Rats ; Rats, Inbred Strains ; Stress, Psychological/*physiopathology
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    Chloramphenicol administration during brain development: impairment of avoidance learning in adulthood (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-10
    Description: Rats treated with chloramphenicol from days 7 to 21 of intrauterine life (50 milligrams per kilogram per day, injected subcutaneously into the mothers) or in the first 3 days of extrauterine life (50 to 100 milligrams per kilogram per day) were trained for avoidance conditioning when 60 days old. The acquisition of the avoidance response was impaired to a highly significant degree in all the treated groups.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bertolini, A -- Poggioli, R -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):238-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244633" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Avoidance Learning/*drug effects ; Brain/drug effects/embryology/*growth & development ; Chloramphenicol/*pharmacology ; Female ; Male ; Maternal-Fetal Exchange ; Pregnancy ; Rats ; Sex Factors
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    Reduction in oocyte number following prenatal exposure to a diet high in galactose (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-04
    Description: When pregnant rats were fed a 50 percent galactose diet there was a striking reduction in oocyte number in the offspring. The most prominent effects were noted after exposure to galactose during the premeiotic stages of oogenesis. Prenatal exposure to galactose or its metabolites may contribute to the premature ovarian failure characteristic of human galactosemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Y T -- Mattison, D R -- Feigenbaum, L -- Fukui, H -- Schulman, J D -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1145-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302587" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dietary Carbohydrates/*physiology ; Female ; Fetus/drug effects/physiology ; Galactose/*pharmacology ; Maternal-Fetal Exchange ; Oocytes/drug effects/*physiology ; Ovum/*physiology ; Pregnancy ; Rats ; Rats, Inbred Strains
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    Calcium-induced cell death: susceptibility of cardiac myocytes is age-dependent (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chizzonite, R A -- Zak, R -- HL-07381/HL/NHLBI NIH HHS/ -- HL-16637/HL/NHLBI NIH HHS/ -- HL-20592/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1508-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280671" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Animals, Newborn/physiology ; Calcium/metabolism/*pharmacology ; Cell Survival/*drug effects ; Creatine Kinase/metabolism ; Heart/*drug effects ; In Vitro Techniques ; Myocardial Contraction/drug effects ; Myocardium/*metabolism ; Rats ; Sarcolemma/drug effects ; Sarcoplasmic Reticulum/drug effects
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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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    Freeze-fracture cytochemistry: replicas of critical point-dried cells and tissues after fracture-label (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-10
    Description: Applications of the new fracture-labeling techniques for the observation of cytochemical labels on platinum-carbon replicas are described. Frozen cells, embedded in a cross-linked protein matrix, and frozen tissues are fractured with a scalpel under liquid nitrogen, thawed, labeled, dehydrated by the critical point drying method, and replicated. This method allows direct, high-resolution, two-dimensional chemical and immunological characterization of the cellular membranes in situ, as well as detection of sites within cross-fractured cytoplasm and extracellular matrix.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉da Silva, P P -- Kachar, B -- Torrisi, M R -- Brown, C -- Parkison, C -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):230-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244630" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/analysis ; Cells/*ultrastructure ; Cytoplasmic Granules/ultrastructure ; Endoplasmic Reticulum/ultrastructure ; Erythrocytes/ultrastructure ; Freeze Fracturing/*methods ; Humans ; Indicators and Reagents ; Intracellular Membranes/ultrastructure ; Leukocytes/ultrastructure ; Microscopy, Electron/methods ; Pancreas/ultrastructure ; Pituitary Gland, Anterior/ultrastructure ; Platinum ; Rats
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    Substance P activity in the bullfrog retina: localization and identification in several vertebrate species (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-05-29
    Description: Immunoreactive substance P is present in the bullfrog retina, possibly in two types of stratified amacrine cells, with their somas in the inner nuclear layer and their neuronal processes entering the inner plexiform layer and ramifying in sublayers 3 or 4 (or both). Occasionally, polygonal somas positive for substance P were found in the ganglion cell layer. Approximately 75 percent of the cell bodies positive for substance P and 65 percent of the radioimmunoassayable substance P were found in the superior half of the frog retina. On the basis of high-performance liquid chromatography, the immunoreactive substance P in the neural retina of the rat, monkey, or chick is similar to synthetic substance P, whereas this is not true of the immunoreactive substance P in the bullfrog or carp retina.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eskay, R L -- Furness, J F -- Long, R T -- New York, N.Y. -- Science. 1981 May 29;212(4498):1049-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6165081" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chickens ; Fluorescent Antibody Technique ; Macaca ; Rana catesbeiana ; Rats ; Retina/analysis/*cytology ; Species Specificity ; Substance P/*analysis
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    Endogenous opiates and fasting (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ettenberg, A -- Rogers, J -- Koob, G F -- Bloom, F E -- Deutsch, J A -- New York, N.Y. -- Science. 1981 Sep 11;213(4513):1282.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6267697" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/physiology ; Animals ; Endorphins/*physiology ; *Fasting ; Pituitary Gland/physiology ; Rats
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    Exposure of newborn rats to pharmacologically active compounds may permanently alter carcinogen metabolism (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-02-13
    Description: Administration of phenobarbital to mother rats during early lactation causes long-term, perhaps permanent, alteration of hepatic microsomal mixed-function oxidase activity and aflatoxin B1 adduct formation in the adult male offspring. These findings suggest that perinatal exposure to pharmacologically active compounds may be a determinant of cancer risk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Faris, R A -- Campbell, T C -- New York, N.Y. -- Science. 1981 Feb 13;211(4483):719-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455708" target="_blank"〉PubMed〈/a〉
    Keywords: Aflatoxins/metabolism ; Animal Population Groups/*physiology ; Animals ; Animals, Suckling/*physiology ; Carcinogens/*metabolism ; Enzyme Induction/drug effects ; Ethylmorphine-N-Demethylase/metabolism ; Microsomes, Liver/metabolism ; Mixed Function Oxygenases/*metabolism ; Oxidoreductases/*metabolism ; Phenobarbital/pharmacology ; Rats
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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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    Long-term stress-induced analgesia and activation of the opiate system (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grau, J W -- Hyson, R L -- Maier, S F -- Madden, J 4th -- Barchas, J D -- New York, N.Y. -- Science. 1981 Sep 18;213(4514):1409-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268445" target="_blank"〉PubMed〈/a〉
    Keywords: Analgesia ; Animals ; Electroshock ; Endorphins/antagonists & inhibitors/*physiology ; Naltrexone/pharmacology ; Pain/*physiopathology ; Rats ; Stress, Physiological/*physiopathology ; Tail ; Time Factors
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    Detection of circulating metallothionein in rats injected with zinc or cadmium (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-13
    Description: Circulating metallothionein was measured by radioimmunoassay over a 13-day period in male Sprague-Dawley rats that received a sequence of three intraperitoneal injections (at 3-day intervals) of either 5 milligrams of zinc or 0.8 milligrams of cadmium per kilogram of body weight. These amounts of zinc and cadmium produced metallothionein concentrations in the range of 2 to 5 nanograms per milliliter of serum (zinc) and 2 to 15 nanograms per milliliter of serum (cadmium). In control rats given saline injections over the same period the metallothionein concentration ranged from 1 to 3 nanograms per milliliter of serum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garvey, J S -- Chang, C C -- ES 01629/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):805-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292012" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cadmium/*pharmacology ; Dose-Response Relationship, Drug ; Male ; Metalloproteins/*blood ; Metallothionein/*blood/immunology ; Radioimmunoassay ; Rats ; Rats, Inbred Strains ; Zinc/*pharmacology
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  • 69
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    Brown adipose tissue: thermic response increased by a single low protein, high carbohydrate meal (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-04
    Description: The weight of interscapular brown fat in the rat and its rate of respiration increased in response to a single meal. These data suggest that brown adipose tissue plays a role in the thermic effect of meals and that diet-induced thermogenesis may reflect the summation of the thermic effects of single meals during prolonged overeating.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glick, Z -- Teague, R J -- Bray, G A -- 1 RO1 AM 27019/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1125-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268419" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue, Brown/anatomy & histology/*metabolism ; Animals ; *Body Temperature Regulation ; Dietary Carbohydrates/*metabolism ; Dietary Proteins/metabolism ; Female ; Liver/metabolism ; Organ Size ; *Oxygen Consumption ; Rats
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  • 70
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    Identification of tissue-specific nuclear antigens transferred to nitrocellulose from polyacrylamide gels (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-02
    Description: Nonhistone protein antigens resolved by electrophoresis in sodium dodecyl sulfate were identified immunochemically after being transferred to nitrocellulose. Use of antiserum to dehistonized chromatin from Novikoff hepatoma revealed numerous protein antigens specific to the chromatin of Novikoff hepatoma in comparison to that of normal rat liver.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glass, W F 2nd -- Briggs, R C -- Hnilica, L S -- CA-26412/CA/NCI NIH HHS/ -- CA-26948/CA/NCI NIH HHS/ -- HD-07043-04/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):70-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7003713" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/*immunology ; Chromosomal Proteins, Non-Histone/*analysis/immunology ; Electrophoresis, Polyacrylamide Gel/methods ; Immunoenzyme Techniques ; Liver/*analysis/ultrastructure ; Liver Neoplasms, Experimental/*analysis/ultrastructure ; Male ; Rats
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  • 71
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    Phototherapy-induced hypocalcemia in newborn rats: prevention by melatonin (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    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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  • 72
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    Phosphatidate as a molecular link between depolarization and neurotransmitter release in the brain (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-12
    Description: Phosphatidate, a neuronal phospholipid, stimulated the uptake of calcium by nerve terminals isolated from the striatum of rat brain. This effect was not produced by other phospholipids or glycolipids. Phosphatidate, but not other phospholipids, evoked the release of [3H] dopamine from striatal synaptosomes. The magnitude of both effects was similar to that observed after chemical depolarization of the nerve terminals. These results show that phosphatidate is the only membrane lipid component that acts as a functionally competent ionophore and support the suggestion that phosphatidate may serve as a link between depolarization and neurotransmitter release in the brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harris, R A -- Schmidt, J -- Hitzemann, B A -- Hitzemann, R J -- DA-02855/DA/NIDA NIH HHS/ -- NS-16061/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1290-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233220" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/metabolism ; Corpus Striatum/drug effects/*physiology ; Dopamine/*metabolism ; Lipid Bilayers ; Membrane Lipids/physiology ; Phosphatidic Acids/*pharmacology ; Phospholipids/physiology ; Rats ; Synaptosomes/drug effects/metabolism
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  • 73
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    Mechanisms of gonadal differentiation (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-20
    Description: Sex differentiation is the result of the translation of genetic sex into gonadal sex. Without recognizable masculinizing signals the embryonic gonad will undergo ovarian differentiation. The main determinant of gonadal differentiation appears to be the presence or absence of a cell surface antigen, called H-Y antigen. The regulation of H-Y antigen expression is complex and involves the interaction between regulatory sites on the Y chromosome, the X chromosome, and possibly the autosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haseltine, F P -- Ohno, S -- 5R01 HD 12289-02/HD/NICHD NIH HHS/ -- R0I AD 00042/AD/ADAMHA HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1272-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010601" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Disorders of Sex Development ; Embryonic Induction ; Female ; Fertility ; Freemartinism/genetics ; Germ Cells/physiology ; H-Y Antigen/genetics/*physiology ; Humans ; Male ; Mammals/genetics ; Mice ; Ovary/embryology ; Rats ; Sex Chromosomes ; *Sex Determination Analysis ; *Sex Differentiation ; Testis/embryology/physiology
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  • 74
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    Epidermal growth factors enhances viral transformation of granulosa cells (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-10
    Description: Kirsten sarcoma virus produced a low incidence of transient morphological transformation in primary cultures of rat ovarian granulosa cells. In the presence of epidermal growth factor, the incidence of transient transformation increased severalfold and two continuous cell lines were established. Epidermal growth factor, a naturally occurring polypeptide hormone, appears to act here as a tumor promoter in the retrovirus-induced transformation of a mesodermally derived epithelium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrison, J -- Auersperg, N -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):218-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264597" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Transformation, Viral/*drug effects ; Cells, Cultured ; Epidermal Growth Factor/*pharmacology ; Female ; Granulosa Cells/*cytology/drug effects ; Kirsten murine sarcoma virus/drug effects/*genetics ; Peptides/*pharmacology ; Rats ; Sarcoma Viruses, Murine/*genetics
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  • 75
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    Peripherally administered reduced pterins do enter the brain (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-22
    Description: The content of tetrahydrobiopterin in rat brain was doubled by peripherally administered tetrahydrobiopterin, with the natural 1 diastereoisomer more effective than the unnatural d configuration. The model pteridine, 6-methyltetrahydropterin was ten times more efficient than tetrahydrobiopterin in crossing the blood-brain barrier, and striatal concentrations of 6-methyltetrahydropterin remained elevated for 2 hours, declining with a half-life of 3 hours. While no evidence for a specific uptake mechanism for concentrating 6-methyltetrahydropterin in cells containing tetrahydrobiopterin was detected, the pterin was found in ts presumed site of action, the nerve terminal. Replacement therapy with reduced pterins may therefore be effective in the treatment of the neurological disorders associated with the variant forms of hyperphenylalaninemia that result from defects in the biosynthesis or metabolism of tetrahydrobiopterin within the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kapatos, G -- Kaufman, S -- New York, N.Y. -- Science. 1981 May 22;212(4497):955-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233193" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biopterin/analogs & derivatives/*metabolism ; Blood-Brain Barrier ; Brain/*metabolism ; Male ; Pteridines/*metabolism ; Pterins/*metabolism ; Rats ; Stereoisomerism ; Structure-Activity Relationship
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  • 76
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    Purified reduced nicotinamide adenine dinucleotide: responses to lactate dehydrogenase isozymes from three cell sources (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-01
    Description: Lactate dehydrogenase (LDH, E.C. 1.1.1.27) isozymes from three single-cell sources reacted differently with reduced nicotinamide adenine dinucleotide (NADH) purified to published chromatographic and spectrophotometric specifications and free of inhibitors of LDH, when compared with a commercial preparation of NADH. The activity of LDH-1, purified from rabbit erythrocytes, increased the most with inhibitor-free NADH; the next most stimulated were the LDH isozymes from a control hepatocyte line; but hardly responsive at all were the same isozymes from chemically transformed cells. Thus isozyme composition alone did not account for the range of responses to purified NADH. The commercial preparation of NADH used in these studies contains the Strandjord-Clayson inhibitors, the most potent group identified in NADH preparations relative to LDH activity. The results suggest that specific molecular differences in individual isozymes contribute to the differential response to the Strandjord-Clayson inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaplan, A E -- Weiss, E R -- Byrne, S T -- El-Torkey, N M -- Margolis, S A -- New York, N.Y. -- Science. 1981 May 1;212(4494):553-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209551" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Neoplastic/metabolism ; Erythrocytes/enzymology ; Isoenzymes ; L-Lactate Dehydrogenase/antagonists & inhibitors/*metabolism ; Liver Neoplasms, Experimental/enzymology ; NAD/analysis/*metabolism ; Rabbits ; Rats
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  • 77
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    Specific and sensitive radioimmunoassay for 3-methoxy-4-hydroxyphenylethyleneglycol (MOPEG) (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-06
    Description: Antibodies that specifically bind the norepinephrine metabolite 3-methoxy-4-hydroxyphenylethyleneglycol (MOPEG) were produced in rabbits after injection of a derivative of MOPEG conjugated with bovine thyroglobulin. A sensitive radioimmunoassay was devised with this antiserum, in which as little as 0.5 nanogram of MOPEG can be accurately measured with a final antibody dilution of 1:180. The antibody appears to be specific for MOPEG, since tritiated MOPEG was not displaced from the antibodies by norepinephrine, epinephrine, dopamine, serotonin, or their major metabolites including MOPEG-sulfate (333 nanograms each).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keeton, T K -- Krutzsch, H -- Lovenberg, W -- New York, N.Y. -- Science. 1981 Feb 6;211(4482):586-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455697" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Specificity ; Brain/*metabolism ; Brain Mapping ; Glycols/*analysis ; Methoxyhydroxyphenylglycol/*analysis/metabolism ; Rabbits ; *Radioimmunoassay/methods ; Rats ; Thyroglobulin
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    Brain aging correlates: retardation by hormonal-pharmacological treatments (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-30
    Description: Mid-aged rats were either adrenalectomized and chronically maintained, or left intact and treated daily for a 9- to 10-month period with a potent analog of the peptide adrenocorticotropin (residues 4 to 9), which has some stimulant properties, or with the neural stimulant pentylenetetrazole. All three treatments reduced hippocampal morphologic correlates of brain aging (neuronal loss, glial reactivity). The pentylenetetrazole and peptide treatments also improved reversal learning. These results suggest that certain endogenous peptides, with stimulant properties, may also exert long-term, trophic effects on brain structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landfield, P W -- Baskin, R K -- Pitler, T A -- AG 01552/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):581-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6270791" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenalectomy ; Adrenocorticotropic Hormone/*pharmacology ; *Aging ; Animals ; Brain/*physiology ; Hippocampus/cytology/physiology ; Learning/physiology ; Pentylenetetrazole/*pharmacology ; Peptide Fragments/*pharmacology ; Rats ; Rats, Inbred Strains
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  • 79
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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)
    Details
    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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  • 80
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    Tetrahydrobiopterin in striatum: localization in dopamine nerve terminals and role in catecholamine synthesis (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-20
    Description: The hydroxylase cofactor, tetrahydrobiopterin, and its biosynthetic system are localized in dopaminergic nerve terminals in the striatum. This conclusion is based on the nearly equivalent loss of tyrosine hydroxylase and tetrahydrobiopterin and its initial biosynthetic enzyme, guanosine triphosphate cyclohydrolase, after injection of 6-hydroxydopamine into the substantia nigra. The role of the hydroxylase cofactor in the regulation of dopamine synthesis is reassessed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, R A -- Miller, L P -- Lovenberg, W -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):919-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117945" target="_blank"〉PubMed〈/a〉
    Keywords: Aminohydrolases/*metabolism ; Animals ; Biopterin/analogs & derivatives/*metabolism ; Corpus Striatum/drug effects/*metabolism ; Dopamine/*metabolism ; GTP Cyclohydrolase/*metabolism ; Hydroxydopamines/pharmacology ; Male ; Pteridines/*metabolism ; Rats ; Rats, Inbred Strains ; Substantia Nigra/drug effects/metabolism ; Tyrosine 3-Monooxygenase/*metabolism
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  • 81
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    Opiate withdrawal in utero increases neonatal morbidity in the rat (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-22
    Description: Long-term oral administration of the long-acting opiate 1-alpha-acetylmethadol (LAAM) to female rats beginning on the day of conception interfered with the dams' ability to carry litters to term. When treatment was initiated 3 weeks prior to mating this effect was not observed. Daily administration of the opiate antagonist naloxone from day 14 of gestation through term, to precipitate withdrawal in utero, resulted in increased stillbirths, decreased pup weight and size, and weight loss 24 hours after birth. These data question the validity of animal experiments which purport to be models for methadone maintenance programs but in which treatment is started immediately prior to or soon after conception. They also suggest that withdrawal in utero may be responsible for many of the adverse effects of opiates on human and animal development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lichtblau, L -- Sparber, S B -- DA 01880/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1981 May 22;212(4497):943-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7195068" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drug Tolerance ; Embryo Implantation/drug effects ; Female ; Fetal Death/*etiology ; Humans ; Litter Size/drug effects ; Methadone/*analogs & derivatives ; Methadyl Acetate/*adverse effects/antagonists & inhibitors ; Naloxone/pharmacology ; Opioid-Related Disorders/*complications ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Substance Withdrawal Syndrome/*complications
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  • 82
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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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  • 83
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    Hypothyroidism elicits electrophysiological noradrenergic subsensitivity in rat cerebellum (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: discharge rats of Purkinje neurons were compared in control and hypothyroid adult rats. Purkinje neurons in hypothyroid rats fired significantly faster and were less sensitive to iontophoretically applied norepinephrine than those in control rats. The subsensitivity of the Purkinje neurons appeared to be primarily due to an alteration in the beta-receptor--adenylate cyclase complex, because the sensitivity of these cells to locally applied N6-monobutyryl adenosine 3'-5'-monophosphate (N6 cyclic AMP) did not change significantly. The sensitivity of the Purkinje neurons to norepinephrine could be restored in hypothyroid rats by administration of triiodothyronine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marwaha, J -- Prasad, K N -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):675-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6270792" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Adenylyl Cyclases/metabolism ; Adrenergic Fibers/*physiopathology ; Animals ; Cerebellum/*physiopathology ; Cyclic AMP/metabolism ; Hypothyroidism/*physiopathology ; Male ; Norepinephrine/*physiology ; Purkinje Fibers/physiopathology ; Rats ; Rats, Inbred Strains ; Receptors, Adrenergic/*physiology ; Receptors, Adrenergic, beta/*physiology ; Triiodothyronine/*pharmacology
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  • 84
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    Regression of aflatoxin B1-induced hepatocellular carcinomas by reduced glutathione (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-01
    Description: Reduced glutathione administered to rats bearing aflatoxin B1-induced liver tumors caused regression of tumor growth and resulted in survival of the animals. since glutathione is a harmless natural product, it merits further investigation as a potential antitumor drug for humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novi, A M -- New York, N.Y. -- Science. 1981 May 1;212(4494):541-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6782675" target="_blank"〉PubMed〈/a〉
    Keywords: Aflatoxin B1 ; *Aflatoxins ; Animals ; Female ; Glutathione/*therapeutic use ; Liver Neoplasms, Experimental/*drug therapy/pathology ; Rats
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  • 85
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    Selective protection of methionine enkephalin released from brain slices by enkephalinase inhibition (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-05
    Description: Methionine enkephalin release was evoked by depolarization of slices from rat striatum with potassium. In the presence of 0.1 microM thiorphan [(N(R,S)-3-mercapto-2-benzylpropionyl)glycine], a potent inhibitor of enkephalin dipeptidyl carboxypeptidase (enkephalinase), the recovery of the pentapeptide in the incubation medium was increased by about 100 percent. A similar effect was observed with the dipeptide phenylalanylalanine, a selective although less potent enkephalinase inhibitor. Inhibition of other known enkephalin-hydrolyzing enzymes--aminopeptidase by 0.1 mM puromycin or angiotensin-converting enzyme by 1 microM captopril--did not significantly enhance the recovery of released methionine enkephalin. These data indicate that enkephalinase is critically involved in the inactivation of the endogenous opioid peptide released from striatal neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patey, G -- De La Baume, S -- Schwartz, J C -- Gros, C -- Roques, B -- Fournie-Zaluski, M C -- Soroca-Lucas, E -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1153-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7015510" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids, Sulfur/*pharmacology ; Animals ; Corpus Striatum/drug effects/*metabolism ; Endorphins/*secretion ; Enkephalin, Methionine ; Enkephalins/antagonists & inhibitors/*secretion ; Mice ; Neprilysin ; Potassium/pharmacology ; *Protease Inhibitors/*pharmacology ; Rats ; Thiorphan ; Tiopronin/analogs & derivatives/*pharmacology
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  • 86
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    Central noradrenergic pathways for the integration of hypothalamic neuroendocrine and autonomic responses (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: Immunohistochemical and axonal transport methods were used to describe the organization of a series of central noradrenergic pathways that interrelate the nucleus of the solitary tract, which receives primary visceral sensory information, and the paraventricular and supraoptic nuclei of the hypothalamus, which participate in autonomic and neuroendocrine modes of homeostatic control. The results indicate that pathways arising from noradrenergic cells in the dorsal vagal complex, the ventrolateral medulla, and the locus coeruleus end in specific subdivisions of the paraventricular and supraoptic nuclei which are involved in the regulation of responses from the pituitary gland and from both divisions of the autonomic nervous system. This circuitry may play an important role in the integration of hypothalamic responses to visceral stimuli.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sawchenko, P E -- Swanson, L W -- DA-00259/DA/NIDA NIH HHS/ -- NS-06734/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):685-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Mapping ; Homeostasis ; Hypothalamus/*physiology ; Neural Pathways/physiology ; Neurosecretory Systems/physiology ; Paraventricular Hypothalamic Nucleus/physiology ; Rats ; Supraoptic Nucleus/physiology ; Sympathetic Nervous System/*physiology ; Vagus Nerve/physiology
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  • 87
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    Preventing maternal cannibalism in rats (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reynolds, R D -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1146.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268426" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/physiology ; *Cannibalism ; Female ; *Maternal Behavior ; Rats
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 88
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    Acetylcholine synthesis in synaptosomes: mode of transfer of mitochondrial acetyl coenzyme A (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-25
    Description: Labeled acetylcholine derived from labeled pyruvate in a synaptosomal preparation from rat brain, incubated with nicotinamide adenine dinucleotide as well as coenzyme A, is stimulated by calcium ions in the absence but not in the presence of Triton X-100. Whereas citrate is taken up by cholinergic synaptosomes because it suppresses the formation of acetylcholine from pyruvate, it is not itself converted into acetylcholine. The evidence suggests that there is a calcium-dependent transfer of mitochondrial acetyl coenzyme A into the cholinergic synaptoplasm, which is apparently devoid of the citrate cleavage enzyme, and is there converted into acetylcholine. The permeability of the inner mitochondrial membrane to coenzyme A and acetyl coenzyme A seems to be enhanced by calcium ions, and this effect may be mediated by mitochondrial phospholipase A2.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benjamin, A M -- Quastel, J H -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1495-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280667" target="_blank"〉PubMed〈/a〉
    Keywords: ATP Citrate (pro-S)-Lyase/metabolism ; Acetyl Coenzyme A/*metabolism ; Acetylcholine/*biosynthesis ; Animals ; Brain/*metabolism ; Calcium/physiology ; Citrates/metabolism ; Mitochondria/*metabolism ; NAD/metabolism ; Phospholipases A/metabolism ; Phospholipases A2 ; Rats ; Synaptosomes/*metabolism
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  • 89
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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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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 90
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    Ureterosigmoidostomy and colon carcinogenesis (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bristol, J B -- Williamson, R C -- New York, N.Y. -- Science. 1981 Oct 16;214(4518):351.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280700" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Colon/*surgery ; Colonic Neoplasms/*etiology ; Rats ; Urinary Diversion/*adverse effects
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  • 91
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    Niacin Reduces Paraquat Toxicity in Rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-26
    Description: Rats poisoned with paraquat benefited from daily niacin therapy. Niacin-treated rats showed delayed and reduced dyspnea. Deaths began approximately 30 hours later. The time required for niacin-treated rats to reach 50 percent mortality increased from 60 to 120 hours, and the dealth rate was reduced form 75 to 55 percent. The benefit by niacin is consistent with the demonstrated role of niacin in preventing cellular decreases of nicotinamide adenine dinucleotide during poisoning of bacteria by paraquat and by hyperbaric oxygen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, O R -- Heitkamp, M -- Song, C S -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1510-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233236" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Liver/drug effects/metabolism ; Male ; NAD/metabolism ; Nicotinic Acids/metabolism/*pharmacology ; Paraquat/*toxicity ; Rats
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  • 92
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    Regeneration of neurites on long-term cultures of sympathetic neurons deprived of nerve growth factor (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-30
    Description: Sympathetic neurons from newborn rats, cultured for 1 month or longer in the virtual absence of nonneuronal cells, were capable of regenerating neurites after neuritotomy. Regeneration occurred even after nerve growth factor was withdrawn from the cultures, although it was much less extensive and appeared limited to a few days following neuritotomy. Even after 29 days of nerve growth factor deprivation, reintroduction of the protein prompted a resumption of neurite growth. Possible roles of both nerve growth factor-independent and -dependent components in adult nerve regeneration are discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Campenot, R B -- NS15559/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):579-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292000" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation/drug effects ; Cells, Cultured ; Ganglia, Sympathetic/*cytology ; Nerve Growth Factors/*pharmacology ; Nerve Regeneration/*drug effects ; Neurons/*cytology ; Rats ; Time Factors
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  • 93
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    DNA synthesis in cultured adult cardiocytes (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-30
    Description: Trypsin-dissociated atrial cardiocytes from adult rats were exposed to [3H]thymidine for sequential 24-hour periods from day 2 to day 12 of culture. On day 3 and each day thereafter, cells were prepared for ultrastructural radioautography and examined with an electron microscope. Maximal incorporation occurred on day 5, when 63 percent of the cardiocytes were labeled. Mitotic activity was never present in more than 0.5 percent of the cardiocytes examined. Incorporation of [3H]thymidine and mitosis occurred only in immature cardiocytes characterized by subsarcolemmal primary filaments and Z bands with or without specific granules; more mature cardiocytes were never labeled.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cantin, M -- Ballak, M -- Beuzeron-Mangina, J -- Anand-Srivastava, M B -- Tautu, C -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):569-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291996" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Cell Division ; Cells, Cultured ; DNA/*biosynthesis ; Female ; Mitosis ; Myocardium/*cytology ; Rats ; Rats, Inbred Strains ; Time Factors
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  • 94
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    Short-term variations in diet composition change the pattern of spontaneous motor activity in rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-07
    Description: The nocturnal activity patterns of rats changed significantly within 3 days after they were given unrestricted access to isocaloric diets in which the ratio of carbohydrate to protein was systematically varied. As the ratio increased, the rats were more continuously active. The subjects showed similar responses to variations in this ratio whether the diet contained 15 or 45 percent fat. No correlation was found between the number of calories an animal ate and its activity pattern.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chiel, H J -- Wurtman, R J -- AM-14228/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):676-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256271" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Darkness ; *Diet ; Dietary Fats/metabolism ; Dietary Proteins/metabolism ; Energy Intake ; Male ; Motor Activity/*physiology ; Rats ; Time Factors
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  • 95
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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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  • 96
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    Single neostriatal efferent axons in the globus pallidus: a light and electron microscopic study (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-21
    Description: Intracellularly labeled rat neostriatal projection neurons were analyzed with both light and electron microscopy. The axons of medium spiny neurons were traced into the globus pallidus and were found to make synaptic contacts with pallidal dendrites. Despite the common somato-dendritic morphology of the neostriatal projection neurons, two different distribution patterns of efferent axons were observed, indicating the presence of functionally different medium spiny neurons in the neostriatum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, H T -- Wilson, C J -- Kitai, S T -- NS 14866/NS/NINDS NIH HHS/ -- NS 17294/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):915-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256286" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/ultrastructure ; Corpus Striatum/*cytology ; Efferent Pathways/cytology ; Globus Pallidus/*cytology ; Horseradish Peroxidase ; Microscopy, Electron ; Rats
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  • 97
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    Axonal elongation into peripheral nervous system "bridges" after central nervous system injury in adult rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-11-20
    Description: The origin, termination, and length of axonal growth after focal central nervous system injury was examined in adult rats by means of a new experimental model. When peripheral nerve segments were used as "bridges" between the medulla and spinal cord, axons from neurons at both these levels grew approximately 30 millimeters. The regenerative potential of these central neurons seems to be expressed when the central nervous system glial environment is changed to that of the peripheral nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉David, S -- Aguayo, A J -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):931-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6171034" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axonal Transport ; Axons/*physiology ; Brain Stem/physiology ; Horseradish Peroxidase ; Medulla Oblongata/*physiology ; *Nerve Regeneration ; Neurons/transplantation ; Peripheral Nerves/*physiology ; Rats ; Spinal Cord/*physiology
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  • 98
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    Sustained intracerebroventricular infusion of brain fuels reduces body weight and food intake in rats (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-04-03
    Description: Long-term infusion of glucose, beta-hydroxybutyrate, and glycerol into the third ventricle of the rat brain caused a stabilization of body weight at a lower than normal level. Among the glucose- and glycerol-treated animals this weight loss was caused in part by temporary hypophagia. Among the animals treated with beta-hydroxybutyrate the weight loss was unaccompanied by a reduction in food intake. The results are consistent with the view that the systems controlling food intake and body weight are sensitive to the availability of brain fuels. They are not consistent however, with the view that these control systems monitor calories independently of their source.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, J D -- Wirtshafter, D -- Asin, K E -- Brief, D -- AM 26030/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):81-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7193909" target="_blank"〉PubMed〈/a〉
    Keywords: 3-Hydroxybutyric Acid ; Animals ; *Appetite Regulation/drug effects ; *Body Weight/drug effects ; Brain/drug effects/*physiology ; Circadian Rhythm ; Drinking/drug effects ; *Eating/drug effects ; Glucose/*pharmacology ; Glycerol/*pharmacology ; Hydroxybutyrates/administration & dosage/*pharmacology ; Hypothalamus/drug effects ; Injections, Intraventricular ; Male ; Rats
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  • 99
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    Reward-induced stereotypy: modulation by the hippocampus (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-12
    Description: In animals with hippocampal damage, the signaled administration of reward is sufficient to induce the sort of behavioral sterotypy and locomotion that heretofore has been observed only after drug administration. Haloperidol returns these behaviors to normal. The interaction of the hippocampus with reward helps to explain many well-known characteristics of animals with lesions in the hippocampus and may have relevance for catecholamine-based clinical disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Devenport, L D -- Devenport, J A -- Holloway, F A -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1288-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7195073" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dextroamphetamine/pharmacology ; Food Deprivation ; Hippocampus/drug effects/*physiology ; Humans ; Locomotion/drug effects ; Rats ; *Stereotyped Behavior/drug effects
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    Long-term potentiation in the hippocampal slice: evidence for stimulated secretion of newly synthesized proteins (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    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
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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