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  • Articles  (195)
  • Rats  (164)
  • Pregnancy  (41)
  • 1980-1984  (195)
  • 1981  (195)
  • Biology  (195)
  • Energy, Environment Protection, Nuclear Power Engineering
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  • Articles  (195)
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  • 1980-1984  (195)
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  • 1
    ISSN: 1432-0827
    Keywords: Osteoporosis ; Immobilization ; Rats ; Vitamin D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary The therapeutic effects of vitamin D analogs, 1,24(R)-dihydroxycholecalciferol [1,24(R)(OH)2D3], 1,24(S)-dihydroxycholecalciferol [1,24(S)(OH)2D3], and 1,25-dihydroxycholecalciferol [1,25(OH)2D3] on immobilization osteoporosis were studied in rats. The right hind limb was immobilized through application of a plaster cast following the section of the sciatic nerve. The left hind limb was intact. Vitamin D analogs were orally administered for 6 weeks at dose levels of 0.02 and 0.10µg/kg/day, respectively. The mean lengths of the immobilized femurs were not significantly different from those of the intact femurs in all the experimental groups. In the immobilized femur of animals treated with 1,24(R)(OH)2D3, 0.10µg/kg, dry and ash weights were heavier and calcium and phosphorus contents greater than those in the nontreated group. Furthermore, the amount of calcified bone mass and the cortical thickness of the femurs of the immobilized limb in 1,24(R)(OH)2D3-treated animals were greater than those in the nontreated animals. Treatment with 1,25(OH)2D3 at 0.10µg/kg caused an increase of the bone mass in both immobilized and intact femurs when compared with those of the control group. It was concluded that the administration of 1,24(R)(OH)2D3 diminished the effect of immobilization in the development of osteoporosis without any side effects.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 33 (1981), S. 129-134 
    ISSN: 1432-0827
    Keywords: Matrix vesicles ; Young/adult ; Rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary The occurrence of matrix vesicles in the maxillary bone of normal young and adult rats was demonstrated by both ultrastructural and enzymatic studies. Transmission electron microscopy revealed that the vesicles are invested in trilaminar membranes. Occasionally, crystals were found both within the vesicles and in the surrounding matrix. Separated fractions of vesicles, membranes, and cells were studied biochemically. The amounts of vesicular protein and enzymatic activity per gram bone in the adult rats were significantly lower than in the young. This coincides with the higher number of vesicles observed in the TEM specimens of young rats when compared to that in the old ones. The specific activities of all enzymes examined in the three bone fractions obtained from both young and adult rats were similar. This indicates that no significant difference exists in the enzymatic characteristics of matrix vesicles from the maxillary bone of young and adult rats.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 217 (1981), S. 11-21 
    ISSN: 1432-0878
    Keywords: Intestinal mucosa ; Small intestinal epithelium ; Ultrastructure ; Duodenum ; Jejunum ; Stereology ; Rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Quantitative macroscopic, light-microscopic and electron-microscopic studies were performed on the small intestine of fasted and non-fasted adult, male Sprague-Dawley rats. In non-fasted rats the small intestine was longer than in fasted rats. Due to the presence of villi the surface area in the duodenum and the jejunum was enlarged about six times. The microvilli on the villous crests caused a surface enlargement by 13 times in the duodenum (value corrected for overestimation due to section thickness), and 19 times in the jejunum of the fasted rats. At the base of the villi these values were about 50% lower. It was calculated that, in the fasted rats, the total enlargement of the luminal surface area — due to villi and microvilli — was 63 times in the duodenum and 81 times in the jejunum (corrected for section thickness). Differences between the villous crest epithelium and the villous base epithelium were also found with regard to the mean cell height, and the volume densities of the absorptive cell nuclei, the mitochondria, and the paracellular channels.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 214 (1981), S. 279-287 
    ISSN: 1432-0878
    Keywords: Axoplasmic flow ; Corticospinal tract ; Tritiated proline ; Rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The rates of axoplasmic transport were studied in the corticospinal tract of the rat by injecting tritiated proline into the sensory-motor cortex and subsequently analyzing the distribution of incorporated label in the spinal cord at intervals after injection. A mathematical model of the anatomy of the corticospinal tract was developed and used in analysis of the data. The rate of a fast component was calculated to be 240–420 mm per day, which is comparable with rates of fast components in the peripheral nervous system (PNS), but considerably greater than rates in other tracts in the central nervous system. A slow component was calculated to have a transport rate of 3–8 mm per day which is greater than rates found either in the CNS or PNS. This higher rate may be related to the greater length of the corticospinal tract as compared to other CNS tracts studied.
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  • 5
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    American Association for the Advancement of Science (AAAS)
    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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    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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  • 7
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    American Association for the Advancement of Science (AAAS)
    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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  • 8
    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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  • 9
    Publication Date: 1981-08-14
    Description: Two maternally derived chromosome sets and both maternal histocompatibility antigen haplotypes were identified in the tissues of a malformed triploid acardiac twin that developed within the same chorion as its normal twin. These findings indicate that the twins arose as a result of independent fertilizations, by two different spermatozoa, of a normal haploid ovum and its diploid first-meiotic-division polar body.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bieber, F R -- Nance, W E -- Morton, C C -- Brown, J A -- Redwine, F O -- Jordan, R L -- Mohanakumar, T -- New York, N.Y. -- Science. 1981 Aug 14;213(4509):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7196086" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Severe Teratoid/*genetics ; Female ; Fertilization ; HLA Antigens/genetics ; Heart Defects, Congenital/*genetics ; Humans ; Infant, Newborn ; Karyotyping ; Male ; Meiosis ; Polyploidy ; Pregnancy ; *Twins
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1981 May 8;212(4495):610.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7194507" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cattle ; *Embryo Transfer ; Female ; Humans ; Pregnancy
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-05-29
    Description: A summary of 111 studies identified in a survey of the world literature on familial resemblances in measured intelligence reveals a profile of average correlations consistent with a polygenic mode of inheritance. There is, however, a marked degree of heterogeneity of the correlations within familial groupings, which is not moderated by sex of familial pairing or by type of intelligence test used.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bouchard, T J Jr -- McGue, M -- 5 T32 MH14647/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 May 29;212(4498):1055-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7195071" target="_blank"〉PubMed〈/a〉
    Keywords: *Family ; Female ; *Genetics, Medical ; Humans ; *Intelligence ; Intelligence Tests ; Male ; Pregnancy ; Sex Factors ; Twins
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  • 12
    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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  • 13
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    American Association for the Advancement of Science (AAAS)
    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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  • 14
    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
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  • 15
    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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  • 16
    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
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  • 17
    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
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  • 18
    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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  • 19
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-03-20
    Description: Gender identity depends largely on postnatal environmental influences, while sex-dimorphic behavior and temperamental sex differences appear to be modified by prenatal sex hormones. A role of the prenatal endocrine milieu in the development of erotic partner preference, as in hetero-, homo-, or bisexual orientation, or of cognitive sex differences has not been conclusively demonstrated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ehrhardt, A A -- Meyer-Bahlburg, H F -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1312-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209510" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adrenal Hyperplasia, Congenital/metabolism/psychology ; Adult ; Androgens/pharmacology ; Behavior/drug effects ; Child ; Cognition/drug effects ; Embryo, Mammalian/drug effects ; Estrogens/pharmacology ; Female ; *Gender Identity ; Gonadal Steroid Hormones/*pharmacology ; Humans ; *Identification (Psychology) ; Male ; Pregnancy ; Pregnancy Complications/drug therapy ; Progestins/pharmacology/therapeutic use ; Sexual Behavior/*drug effects
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  • 20
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    American Association for the Advancement of Science (AAAS)
    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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  • 21
    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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  • 22
    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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  • 23
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    American Association for the Advancement of Science (AAAS)
    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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  • 24
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    American Association for the Advancement of Science (AAAS)
    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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  • 25
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    American Association for the Advancement of Science (AAAS)
    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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  • 26
    Publication Date: 1981-09-04
    Description: Ovaries removed from New Zealand White rabbits were perfused and exposed to gonadotropin in vitro. The ova ovulated in vitro (N = 56) were recovered and cultured and then transferred to the oviducts of six previously mated Dutch Belted hosts. Twelve of the resulting 36 offspring (33.3 percent) were white. In control matings between 12 Dutch Belted females (six randomly selected and the six hosts) and New Zealand White males, only one of 80 (1.2 percent) offspring was white. These data indicate that ova ovulated in vitro can be transferred to the oviduct of a host rabbit where they may be fertilized and after implantation may develop into viable embryos.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kobayashi, Y -- Santulli, R -- Wright, K H -- Wallach, E E -- HD-05948/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1127-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268420" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chorionic Gonadotropin/*pharmacology ; Embryo Transfer ; Female ; *Fertilization in Vitro ; Ovary/drug effects/*physiology ; *Ovulation/drug effects ; Pregnancy ; Rabbits
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  • 27
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    American Association for the Advancement of Science (AAAS)
    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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  • 28
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    American Association for the Advancement of Science (AAAS)
    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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  • 29
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    American Association for the Advancement of Science (AAAS)
    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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  • 30
    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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  • 31
    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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  • 32
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    American Association for the Advancement of Science (AAAS)
    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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  • 33
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    American Association for the Advancement of Science (AAAS)
    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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  • 34
    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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  • 35
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    American Association for the Advancement of Science (AAAS)
    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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  • 36
    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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  • 37
    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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  • 38
    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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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-10
    Description: Ninety-two cases of brain tumor in children less than 10 years old were compared with 92 matched controls for parental occupational history. Cases were more likely than controls to show material occupations involving chemical exposure, paternal occupations involving solvents, and employment of father in the aircraft industry. These three factors were not affected by adjustment for the potential confounding variables examined in this study.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peters, F M -- Preston-Martin, S -- Yu, M C -- P01CA17054/CA/NCI NIH HHS/ -- R01CA20571/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):235-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244631" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollutants/*adverse effects ; Air Pollutants, Occupational/*adverse effects ; Brain Neoplasms/*chemically induced ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; *Maternal-Fetal Exchange ; Pregnancy ; Respiration ; Risk ; Skin Absorption ; Solvents
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  • 40
    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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  • 41
    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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  • 42
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    American Association for the Advancement of Science (AAAS)
    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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  • 43
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    American Association for the Advancement of Science (AAAS)
    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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  • 44
    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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  • 45
    Publication Date: 1981-10-30
    Description: Viruses classified by immunologic criteria as equine herpesvirus 1 cause respiratory disease and abortion in horses. Restriction endonuclease analyses of the DNA's of viruses from animals with respiratory disease and from aborted fetuses show that the patterns for respiratory viruses, while similar to each other, are entirely different from the patterns for fetal viruses. It is therefore proposed that the DNA restriction endonuclease patterns of fetal and respiratory viruses analyzed in this study be designated as prototypic of equine herpesvirus 1 and 4, respectively.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Studdert, M J -- Simpson, T -- Roizman, B -- CA 08494/CA/NCI NIH HHS/ -- CA 09241/CA/NCI NIH HHS/ -- CA 19264/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):562-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6270790" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Veterinary/*microbiology ; Animals ; DNA Restriction Enzymes ; DNA, Viral/genetics ; Female ; Fetus/microbiology ; Herpesviridae/*genetics ; Herpesvirus 1, Equid/*genetics ; Horse Diseases/*microbiology ; Horses ; Pregnancy
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  • 46
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    American Association for the Advancement of Science (AAAS)
    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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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1253.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233217" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Induced ; *Amniocentesis ; Congenital Abnormalities/diagnosis ; Federal Government ; Female ; Humans ; Legislation, Medical ; Pregnancy ; United States
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  • 48
    Publication Date: 1981-07-31
    Description: Erythrocytes infected with the late stages of the human malarial parasite Plasmodium falciparum became attached to a subpopulation of cultured human endothelial cells by knoblike protrusions on the surface of the infected erythrocytes. Infected erythrocytes did not bind to cultured fibroblasts; uninfected erythrocytes did not bind to either endothelial cells or fibroblasts. The results suggest a specific receptor-ligand interaction between endothelial cells and a component, components, in the knobs of the infected erythrocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Udeinya, I J -- Schmidt, J A -- Aikawa, M -- Miller, L H -- Green, I -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):555-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017935" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aotus trivirgatus ; Cells, Cultured ; Endothelium/microbiology ; Erythrocytes/*microbiology/ultrastructure ; Female ; Humans ; Microscopy, Electron ; Plasmodium falciparum/*pathogenicity ; Pregnancy ; Umbilical Veins
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  • 49
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    American Association for the Advancement of Science (AAAS)
    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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  • 50
    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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  • 51
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    American Association for the Advancement of Science (AAAS)
    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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  • 52
    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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  • 53
    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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  • 54
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    American Association for the Advancement of Science (AAAS)
    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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  • 55
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    American Association for the Advancement of Science (AAAS)
    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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  • 56
    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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  • 57
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    American Association for the Advancement of Science (AAAS)
    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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  • 58
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    American Association for the Advancement of Science (AAAS)
    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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  • 59
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    American Association for the Advancement of Science (AAAS)
    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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  • 60
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-01-02
    Description: Rat pups nursed by pregnant dams grow as fast as pups reared by dams that are not pregnant. Moreover, litters that were in utero during a lactation are as numerous at birth and grow as fast as pups developing in a nonlactating, pregnant mother. These litters continue to grow as fast as pups born to nonlactating dams whether or not the first litter remains after the birth of the second litter. When pregnant and lactating dams have a restricted food supply, some dams are capable of extending the duration of their pregnancies by over 2 weeks past that of nonlactating, pregnant dams. This facultative prolongation of pregnancy apparently allows females to carry normal litters to term.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Woodside, B -- Wilson, R -- Chee, P -- Leon, M -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):76-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444451" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*physiology ; Energy Intake ; Energy Metabolism ; Female ; *Lactation ; Litter Size ; Pregnancy ; *Pregnancy, Animal ; Rats/*physiology
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  • 61
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-31
    Description: An established line of mesenchymal cells from the human embryonic palate is highly sensitive to the stimulatory effect of epidermal growth factor on growth, labeled thymidine incorporation, and ornithine decarboxylase activity. The results suggest that epidermal growth factor may play a key role in development of various human embryonic and fetal tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoneda, T -- Pratt, R M -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):563-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017936" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division/drug effects ; Cell Line ; DNA Replication/drug effects ; Embryo, Mammalian ; Epidermal Growth Factor/*pharmacology ; Female ; Humans ; Insulin/pharmacology ; Kinetics ; Organ Specificity ; Ornithine Decarboxylase/metabolism ; Palate/drug effects/*physiology ; Peptides/*pharmacology ; Pregnancy
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zack, B G -- New York, N.Y. -- Science. 1981 Jul 17;213(4505):291.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244615" target="_blank"〉PubMed〈/a〉
    Keywords: *Abortion, Spontaneous ; *Beginning of Human Life ; *Embryo, Mammalian ; Female ; Humans ; *Jurisprudence ; *Life ; *Personhood ; Pregnancy ; United States
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  • 63
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    American Association for the Advancement of Science (AAAS)
    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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  • 64
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    American Association for the Advancement of Science (AAAS)
    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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  • 65
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    American Association for the Advancement of Science (AAAS)
    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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  • 66
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    American Association for the Advancement of Science (AAAS)
    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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  • 67
    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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  • 68
    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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  • 69
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    American Association for the Advancement of Science (AAAS)
    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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  • 70
    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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  • 71
    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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  • 72
    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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  • 73
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    American Association for the Advancement of Science (AAAS)
    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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  • 74
    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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  • 75
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-11-13
    Description: Extraction of fibronectin from two human tissues, lung parenchyma and placental villi, was facilitated by the incorporation of heparin into extraction media. The effect of heparin was additive to the effect of urea which is known to extract fibronectin. These experiments provide further evidence that fibronectin and glycosaminoglycans are associated in connective tissues and the use of heparin forms the basis for a simple method for extraction and quantitation of tissue fibronectin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bray, B A -- Mandl, I -- Turino, G M -- HL 15832/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):793-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292011" target="_blank"〉PubMed〈/a〉
    Keywords: Dermatan Sulfate ; Female ; Fibronectins/*isolation & purification ; *Heparin ; Heparitin Sulfate ; Humans ; Lung/analysis ; Placenta/analysis ; Pregnancy ; Urea
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  • 76
    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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  • 77
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    American Association for the Advancement of Science (AAAS)
    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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  • 78
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    American Association for the Advancement of Science (AAAS)
    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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  • 79
    Publication Date: 1981-05-01
    Description: Female prairie voles (Microtus ochrogaster) exposed to a single drop of male urine on the upper lip showed changes in concentrations of luteinizing hormone-releasing hormone (LHRH) and norepinephrine in olfactory bulb tissue; no such changes occurred in dopamine concentration. The changes were measured in the posterior but not the anterior olfactory bulb tissue of females within 1 hour after they were exposed to urine. These females also showed rapid increases in serum concentrations of luteinizing hormone. Females exposed to water on the upper lip showed none of these changes. These results suggest that in this species LHRH and norepinephrine in the olfactory bulb may mediate luteinizing hormone release in response to external (pheromonal) chemical cues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dluzen, D E -- Ramirez, V D -- Carter, C S -- Getz, L L -- HDO9328/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 May 1;212(4494):573-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010608" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arvicolinae/*physiology ; Estrus ; Female ; Gonadotropin-Releasing Hormone/*metabolism ; Humans ; Luteinizing Hormone/blood ; Male ; Norepinephrine/*metabolism ; Olfactory Bulb/*metabolism ; Pheromones/*urine ; Pregnancy ; Reproduction ; Rodentia/*physiology ; Stress, Psychological/physiopathology
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  • 80
    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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  • 81
    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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  • 82
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    American Association for the Advancement of Science (AAAS)
    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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  • 83
    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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  • 84
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    American Association for the Advancement of Science (AAAS)
    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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  • 85
    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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  • 86
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    American Association for the Advancement of Science (AAAS)
    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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  • 87
    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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  • 88
    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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  • 89
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    American Association for the Advancement of Science (AAAS)
    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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  • 90
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-04-17
    Description: Sexually receptive female Spermophilus beldingi (Rodentia: Sciuridae) usually mate with several different males. The paternity of 27 litters born in 1977 and 1978 was ascertained by combining field observations of mating with laboratory paternity exclusion analyses. Most of the litters (78 percent) were multiply sired, usually by two or three males. This may be the highest frequency of multiple paternity ever directly demonstrated in a natural population.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hanken, J -- Sherman, P W -- New York, N.Y. -- Science. 1981 Apr 17;212(4492):351-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209536" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Male ; Pregnancy ; Sciuridae/*physiology ; *Sexual Behavior, Animal
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  • 91
    Publication Date: 1981-06-19
    Description: Concentrations of estradiol and progesterone in blood collected during the 12.5-day gestation period of the Virginia opossum were not significantly different from those during equivalent days of the estrous cycle. Progesterone was correlated with an index of corpora luteral mass. Ratio of estradiol to progesterone were highest 3 to 4 days before estrus and on the day of parturition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harder, J D -- Fleming, M W -- New York, N.Y. -- Science. 1981 Jun 19;212(4501):1400-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233228" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Corpus Luteum/physiology ; Estradiol/*blood ; Estrus ; Female ; Opossums/*physiology ; Pregnancy ; *Pregnancy, Animal ; Progesterone/*blood ; Species Specificity
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  • 92
    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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  • 93
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    American Association for the Advancement of Science (AAAS)
    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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  • 94
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    American Association for the Advancement of Science (AAAS)
    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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  • 95
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    American Association for the Advancement of Science (AAAS)
    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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  • 96
    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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  • 97
    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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  • 98
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    American Association for the Advancement of Science (AAAS)
    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
    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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  • 99
    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
    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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  • 100
    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
    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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