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  • Rats  (281)
  • Base Sequence  (97)
  • Cells, Cultured  (75)
  • American Association for the Advancement of Science (AAAS)  (420)
  • American Chemical Society
  • Blackwell Publishing Ltd
  • 1980-1984  (420)
  • 1965-1969
  • 1925-1929
  • 1984  (209)
  • 1981  (211)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (420)
  • American Chemical Society
  • Blackwell Publishing Ltd
  • Springer  (5)
Years
  • 1980-1984  (420)
  • 1965-1969
  • 1925-1929
Year
  • 1
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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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  • 2
    Publication Date: 1981-05-22
    Description: Incubation of cortical synaptic membranes with low concentrations of calcium resulted in a decrease in the amount of a high-molecular-weight doublet protein and an increase in the sodium-independent binding of glutamate. Both effects were blocked by the thiol protease inhibitor leupeptin. These results suggest that calcium-induced proteolysis of membrane components regulates the number of glutamate receptors in neuronal membranes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baudry, M -- Bundman, M C -- Smith, E K -- Lynch, G S -- MH-19793-09/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 May 22;212(4497):937-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7015504" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/antagonists & inhibitors/*pharmacology ; Cerebellum/metabolism ; Cerebral Cortex/metabolism ; Cysteine Endopeptidases ; Endopeptidases/*metabolism ; Glutamates/*metabolism ; Leupeptins/pharmacology ; Membrane Proteins/*metabolism ; Molecular Weight ; Rats ; Synaptic Membranes/*metabolism
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  • 3
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    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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  • 4
    Publication Date: 1981-03-06
    Description: Living skin-equivalent grafts consisting of fibroblasts cast in collagen lattices and seeded with epidermal cells were successfully grafted onto the donors of the cells. The grafts were vascularized, did not evoke a homograft reaction, inhibited wound contraction, filled the wound space, and persisted.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, E -- Ehrlich, H P -- Buttle, D J -- Nakatsuji, T -- GN25561/PHS HHS/ -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1052-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7008197" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biocompatible Materials ; *Collagen ; Epidermis/cytology ; Extracellular Space ; Fibroblasts/*transplantation ; Graft Rejection ; Male ; Rats ; *Skin Transplantation ; Wound Healing
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  • 5
    Publication Date: 1981-04-03
    Description: The synthetic peptide NH2-Tyr-Pro-Phe-Pro-CONH2 (morphiceptin), which is the amide of a fragment of the milk protein beta-casein, has morphinelike activities and is highly specific for morphine (mu) receptors but not for enkephalin (delta) receptors. It is as active as morphine in the guinea pig ileum but much less active in the mouse and rat vas deferens. The discovery of this specific morphine receptor ligand substantiates the hypothesis of multiple opiate receptors. The ligand, which may be of physiological significance since a very similar, or identical, activity can be detected in enzymatic digests of beta-casein, may prove useful for further investigation of the functions of opiate receptor subtypes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, K J -- Lillian, A -- Hazum, E -- Cuatrecasas, P -- Chang, J K -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):75-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259732" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Caseins/pharmacology ; Dihydromorphine/metabolism ; Endorphins/*pharmacology ; Enkephalins/metabolism ; Guanosine Triphosphate/pharmacology ; Guinea Pigs ; Ileum/drug effects ; Male ; Mice ; Naloxone/metabolism ; Rats ; Receptors, Opioid/*drug effects ; Sodium/pharmacology ; Vas Deferens/drug effects
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  • 6
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    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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  • 7
    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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  • 8
    Publication Date: 1981-05-22
    Description: Sodium-23 nuclear magnetic resonance images of phantoms and gated images of isolated perfused working rat hearts were obtained. By synchronizing the nuclear magnetic resonance process to the heartbeat, images were obtained at systole and at diastole.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeLayre, J L -- Ingwall, J S -- Malloy, C -- Fossel, E T -- HL 22542/HL/NHLBI NIH HHS/ -- HL 26215/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 May 22;212(4497):935-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233188" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Diastole ; In Vitro Techniques ; Magnetic Resonance Spectroscopy/*methods ; Models, Structural ; *Myocardial Contraction ; Rats ; Sodium ; Systole
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  • 9
    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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  • 10
    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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  • 11
    Publication Date: 1981-01-09
    Description: Adult rats fed high concentrations of dietary protein for 9 weeks gained more weight than rats fed isoenergetic diets containing less protein. There were no significant differences in tail and body lengths among several groups of rats on diets containing different amounts of protein; however, total body fat was significantly greater in the rats fed on diets containing 25 percent protein compared to the rats fed 5 percent protein diets. These findings suggest that the role of dietary protein in obesity and other conditions deserves further scrutiny.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Donald, P -- Pitts, C C -- Pohl, S L -- AM05955/AM/NIADDK NIH HHS/ -- AM22125/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 9;211(4478):185-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444462" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Animals, Laboratory ; *Body Composition ; *Body Weight ; Dietary Proteins/*metabolism ; Energy Intake ; Obesity/metabolism ; Rats
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  • 12
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    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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  • 13
    Publication Date: 1981-11-20
    Description: Cells of the homogeneous hybrid line neuroblastoma x glioma (NG108-15) have many neuronal properties. Immunocytochemical tests show that they contain both immunoreactive renin and angiotensin; direct radioimmunoassays show that they are positive for renin, angiotensin I, and angiotensin II; enzymatic assays show that they contain angiotensinogen and converting enzyme as well. The renin appears to be present in an enzymatically inactive form that can be activated by trypsin and then blocked by antiserum to purified mouse submaxillary renin. Renin concentration and activity are increased by enhancing cellular differentiation with dibutyryl cyclic adenosine monophosphate or by serum withdrawal. These findings demonstrate a complete renin-angiotensin system within these neuron-like cells, and suggest that activation of intracellular renin could generate angiotensin II.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fishman, M C -- Zimmerman, E A -- Slater, E E -- HL-21247/HL/NHLBI NIH HHS/ -- HL-24105/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):921-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272392" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin I/*analysis ; Angiotensin II/*analysis ; Angiotensins/*analysis ; Animals ; Cell Line ; Cricetinae ; Glioma/*metabolism ; Hybrid Cells/*metabolism ; Mice ; Neuroblastoma/*metabolism ; Peptidyl-Dipeptidase A/metabolism ; Radioimmunoassay ; Rats ; Renin/*metabolism
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  • 14
    Publication Date: 1981-11-06
    Description: The effects of long- and short-term administration of the tricyclic antidepressant desipramine on intracranial self-stimulation in rats were studied with electrodes in the A10 region of the dopamine-containing cell bodies of the ventromedial tegmentum. Long-term desipramine administration resulted in a significant shift to the left in the ascending portion of the rate--current intensity function, indicating that the activity of the mesolimbic dopamine system was enhanced. These findings point to a possible dopaminergic mechanism of action of antidepressants and support speculations concerning the role of dopamine-containing neurons in the pathophysiology of depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fibiger, H C -- Phillips, A G -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):683-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7197394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Depression/physiopathology ; Desipramine/*administration & dosage ; Dopamine/*physiology ; Humans ; Limbic System/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Self Stimulation/*drug effects ; Time Factors
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  • 15
    Publication Date: 1981-04-03
    Description: Human malignant cancer tumors grafted into nude mice produce tumors containing both human cancer cells and the host's stromal cells. After short-term propagation of these tumors in vitro, the murine mesenchymal cells appear transformed and are tumorigenic in nude mice. However, established human cancer cell lines fail to similarly after adjacent murine stromal cells when used to produce tumors in nude mice. These experiments suggest that cancer cells may recruit normal cells to become malignant, qualifying the view of the clonal (unicellular) origin of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldenberg, D M -- Pavia, R A -- 1R01 CA17198/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209521" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/pathology ; Animals ; Cell Line ; Cells, Cultured ; Colonic Neoplasms/pathology ; Fibrosarcoma/*etiology ; Humans ; Karyotyping ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Middle Aged ; Neoplasm Transplantation ; Neoplasms, Experimental/*etiology ; Transplantation, Heterologous
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  • 16
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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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  • 17
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-04-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furcinitti, P S -- Todd, P -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209518" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Survival/*radiation effects ; Cells, Cultured ; Dose-Response Relationship, Radiation ; HeLa Cells/radiation effects ; Humans
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-10-23
    Description: Voltage clamp studies of macrophages from cultures of mouse spleen macrophages produced N-shaped steady-state current-voltage curves containing a region of negative slope resistance. Some macrophages exhibit two stable states of membrane potential, having current-voltage relationships that cross the voltage axis at three points. Outward currents that turn on at voltages of +15 millivolts or greater were noted in several cells. The addition of barium chloride to the bathing medium abolished the negative slope resistance and reduced the inward currents in response to hyperpolarizing voltage steps. These data provide direct evidence that macrophages exhibit at least tow different voltage-dependent conductances and demonstrate that voltage clamp techniques can be useful in studying the membrane properties of leukocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallin, E K -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):458-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291986" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Barium/pharmacology ; Cell Membrane/physiology ; Cells, Cultured ; Electric Conductivity ; Macrophages/*physiology ; Membrane Potentials ; Mice ; Spleen/cytology
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  • 19
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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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  • 20
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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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  • 21
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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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  • 22
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-11-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):775-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292010" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromatin/*ultrastructure ; Deoxyribonucleases/metabolism ; *Gene Expression Regulation ; Humans ; Nucleic Acid Conformation
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  • 23
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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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  • 24
    Publication Date: 1981-12-04
    Description: A DNA sequence coding for the immunogenic capsid protein VP3 of foot-and-mouth disease virus A12, prepared from the virion RNA, was ligated to a plasmid designed to express a chimeric protein from the Escherichia coli tryptophan promoter-operator system. When Escherichia coli transformed with this plasmid was grown in tryptophan-depleted media, approximately 17 percent of the total cellular protein was found to be an insoluble and stable chimeric protein. The purified chimeric protein competed equally on a molar basis with VP3 for specific antibodies to foot-and-mouth disease virus. When inoculated into six cattle and two swine, this protein elicited high levels of neutralizing antibody and protection against challenge with foot-and-mouth disease virus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleid, D G -- Yansura, D -- Small, B -- Dowbenko, D -- Moore, D M -- Grubman, M J -- McKercher, P D -- Morgan, D O -- Robertson, B H -- Bachrach, H L -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1125-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272395" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibody Formation ; Base Sequence ; Cattle ; Cattle Diseases/*prevention & control ; *Cloning, Molecular ; DNA Restriction Enzymes ; DNA, Recombinant/metabolism ; Foot-and-Mouth Disease/*prevention & control ; Immunity, Cellular ; Protein Biosynthesis ; Swine ; Swine Diseases/*prevention & control ; Transcription, Genetic ; *Vaccines ; Viral Proteins/genetics/*therapeutic use
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  • 25
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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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  • 26
    Publication Date: 1981-06-05
    Description: Two divalent cation ionophores, A23187 and Ionomycin, which are selective for calcium, stimulated the resorption of fetal rat long bones in organ culture at 0.1 to 1 micromolar but not at higher concentrations. Both agents inhibited DNA synthesis at concentrations that stimulated resorption. These results might explain the differences in ionophore effects on bone previously reported, and they imply that cell replication is not required for osteoclast formation in fetal rat long bone cultures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lorenzo, J A -- Raisz, L G -- AM 07290/AM/NIADDK NIH HHS/ -- AM 18063/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1157-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785885" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/*pharmacology ; Bone Resorption/*drug effects ; Bone and Bones/drug effects/*metabolism ; Calcimycin/*pharmacology ; Calcium/metabolism ; Calcium Radioisotopes ; Cells, Cultured ; DNA/*biosynthesis ; DNA Replication/*drug effects ; Ethers/pharmacology ; Fetus ; Ionomycin ; Ionophores/pharmacology ; Kinetics ; Mice ; Parathyroid Hormone/pharmacology
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  • 27
    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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  • 28
    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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  • 29
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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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  • 30
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-08-21
    Description: Studies of the length of DNA fragments produced upon decay of iodine-125-labeled deoxycytidine that was located at a single position within a DNA fragment of defined sequence demonstrate that most radiochemical damage occurs within 15 to 20 angstroms of the site of iodine-125 decay. However, DNA strand breakage was detectable up to 70 angstroms from the site of iodine-125 decay.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, R F -- Haseltine, W A -- CA 19589/CA/NCI NIH HHS/ -- CA 25118/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):896-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256283" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA/*radiation effects ; Hydrolysis ; *Iodine Radioisotopes
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  • 31
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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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  • 32
    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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  • 33
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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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  • 34
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-05-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1981 May 29;212(4498):1015-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785883" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/*genetics ; Base Sequence ; *Genes ; Humans ; Immunoglobulin Heavy Chains/genetics ; Immunoglobulin Light Chains/genetics ; Immunoglobulins/*genetics ; Transcription, Genetic
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  • 35
    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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  • 36
    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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  • 37
    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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  • 38
    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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  • 39
    Publication Date: 1981-10-23
    Description: The complete nucleotide sequence of a mammalian transforming retrovirus. Moloney murine sarcoma virus, has been determined. MSV, recombinant virus derived of helper viral and cellular sequences, possesses termini resembling prokaryotic transposable elements. The viral genome has the coding capacity for the Moloney murine leukemia virus gag gene product and contains large deletions in pol and env genes. A large open reading frame encompassing its cell-derived sequences codes for its putative transforming protein. The nature of some of the important domains in the viral genome has been established, and their structure is discussed in relation to their function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reddy, E P -- Smith, M J -- Aaronson, S A -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):445-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6170110" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Viral/genetics ; Base Sequence ; Binding Sites ; Cell Transformation, Viral ; DNA, Viral/*genetics ; Defective Viruses/genetics ; Gene Products, gag ; *Genes, Viral ; Moloney murine leukemia virus/*genetics ; RNA, Transfer/genetics ; RNA-Directed DNA Polymerase/genetics ; Repetitive Sequences, Nucleic Acid ; Sarcoma Viruses, Murine/*genetics ; Transcription, Genetic ; Viral Proteins/genetics
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  • 40
    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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  • 41
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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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  • 42
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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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  • 43
    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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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 44
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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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  • 45
    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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  • 46
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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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  • 47
    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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  • 48
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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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  • 49
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-04-17
    Description: Vitellogenin is synthesized under estrogen control in the liver, extensively modified, transported to the ovary, and there processed to the yolk proteins lipovitellin and phosvitin. In the frog Xenopus laevis there are at least four distinct but related vitellogenin genes. The two genes A1 and A2 have a 95 percent sequence homology in their messenger RNA coding regions, and contain 33 introns that interrupt the coding region (exons) at homologous positions. Sequences and lengths of analogous introns differ, and many introns contain repetitive DNA elements. The introns in these two genes that have apparently arisen by duplication have diverged extensively by events that include deletions, insertions, and probably duplications. Rapid evolutionary change involving rearrangements and the presence of repeated DNA suggests that the bulk of the sequences within introns may not have any specific function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wahli, W -- Dawid, I B -- Ryffel, G U -- Weber, R -- New York, N.Y. -- Science. 1981 Apr 17;212(4492):298-304.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209528" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cloning, Molecular ; DNA/genetics ; Estrogens/physiology ; Female ; *Genes ; Lipoproteins/*genetics ; Liver/secretion ; Male ; Oocytes/metabolism ; RNA, Messenger/metabolism ; Receptors, Estrogen/metabolism ; Repetitive Sequences, Nucleic Acid ; Vitellogenins/biosynthesis/*genetics ; Xenopus laevis/*genetics/metabolism
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  • 50
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-01-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wade, N -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):33-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444446" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA/*genetics ; Electrophoresis, Polyacrylamide Gel ; Humans ; Isoelectric Point ; Molecular Weight ; Proteins/analysis/*genetics
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  • 51
    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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  • 52
    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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  • 53
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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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  • 54
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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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  • 55
    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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  • 56
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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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  • 57
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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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  • 58
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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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  • 59
    Publication Date: 1981-07-10
    Description: Southern blot hybridization was used to identify human and other vertebrate DNA sequences that were homologous to cloned DNA fragments containing the oncogenic nucleic acid sequences of three different type C mammalian retroviruses (simian sarcoma virus, the Snyder-Theilen strain of feline sarcoma virus, and the Harvey strain of murine sarcoma virus). Each onc gene counterpart has a single genetic locus, which probably contains non-onc intervening sequences. The human DNA sequences may represent genes important to cell growth or cell differentiation, or both. Their identification and isolation may allow elucidation of their role in these processes and in neoplasias.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wong-Staal, F -- Dalla-Favera, R -- Franchini, G -- Gelmann, E P -- Gallo, R C -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):226-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264598" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Cell Transformation, Viral ; *Cloning, Molecular ; DNA/*genetics ; DNA, Viral/*genetics ; *Genes ; Humans ; Nucleic Acid Hybridization ; Retroviridae/*genetics ; Sarcoma Virus, Woolly Monkey/genetics ; Sarcoma Viruses, Murine/genetics ; Species Specificity
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  • 60
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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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  • 61
    Publication Date: 1984-04-27
    Description: Hydroxylated derivatives of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), a nigrostriatal neurotoxin in humans and primates, noncompetitively inhibited dihydropteridine reductase from human liver and rat striatal synaptosomes in vitro at micromolar concentrations. In contrast, MPTP and its chloro- and norderivatives did not inhibit this enzyme at lower than millimolar concentrations. Dihydropteridine reductase converts dihydrobiopterin to tetrahydrobiopterin, the required cofactor for the hydroxylation of aromatic amino acids during the synthesis of dopamine and serotonin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abell, C W -- Shen, R S -- Gessner, W -- Brossi, A -- HD 14635/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 27;224(4647):405-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6608790" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine ; Animals ; Corpus Striatum/enzymology ; Dihydropteridine Reductase/*antagonists & inhibitors ; Humans ; Hydroxylation ; Liver/enzymology ; NAD/metabolism ; NADH, NADPH Oxidoreductases/*antagonists & inhibitors ; Pyridines/*pharmacology ; Rats ; Structure-Activity Relationship ; Synaptosomes/enzymology
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-28
    Description: The effect of age on the plasticity of the putative peptide neurotransmitter substance P (SP) was examined in the rat superior cervical sympathetic ganglion. Explantation of ganglia from 6-month-old rats to serum-supplemented culture resulted in a tenfold increase in SP concentration, reproducing results previously obtained for ganglia from neonatal rats. Veratridine prevented the increase in SP concentration in adult ganglia, and tetrodotoxin blocked the veratridine effect, suggesting that membrane depolarization and sodium influx prevented the rise in the SP content of adult ganglia as well as of neonatal ganglia. However, the time courses of the increase in the amount of the peptide differed in neonatal and mature ganglia, suggesting that some aspects of regulation may differ in the two. The effects of aging on neural plasticity were further analyzed by explanting ganglia from 2-year-old rats. No significant increase in SP concentration was observed in these ganglia. Remarkable plasticity thus seems to persist in mature neurons but may be deficient in aged sympathetic neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adler, J E -- Black, I B -- HD 12108/HD/NICHD NIH HHS/ -- NS 10259/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 28;225(4669):1499-500.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6206570" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Culture Techniques ; Ganglia, Sympathetic/*analysis/cytology/physiology ; *Neuronal Plasticity ; Neurons/*analysis/physiology ; Rats ; Substance P/*analysis ; Tetrodotoxin/pharmacology ; Veratridine/pharmacology
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  • 63
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-15
    Description: The obituary for William A. Altemeier, Jr. (4 May, p. 525), was incorrect. Dr. Altemeier was chairman of the Department of Surgery at the University of Cincinnati.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alexander, A D -- New York, N.Y. -- Science. 1984 Jun 15;224(4654):1158.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6729449" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/*microbiology ; Dogs ; Humans ; Leptospira ; Leptospirosis/*microbiology/transmission ; Mice ; Mice, Inbred ICR ; Primates ; Rats
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  • 64
    Publication Date: 1984-03-23
    Description: Rats maintained for 12 weeks on diets moderately or more severely deficient in magnesium showed significant elevations in arterial blood pressure compared to control animals. Examination of the mesenteric microcirculation in situ revealed that dietary magnesium deficiency resulted in reduced capillary, postcapillary, and venular blood flow concomitant with reduced terminal arteriolar, precapillary sphincter, and venular lumen sizes. The greater the degree of dietary magnesium deficiency the greater the reductions in microvascular lumen sizes. These findings may provide a rationale for the etiology, as well as treatment, of some forms of hypertensive vascular disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Altura, B M -- Altura, B T -- Gebrewold, A -- Ising, H -- Gunther, T -- HL18015/HL/NHLBI NIH HHS/ -- HL29600/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1984 Mar 23;223(4642):1315-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6701524" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arterioles/pathology ; *Blood Pressure ; Capillaries/pathology ; Magnesium/blood ; Magnesium Deficiency/pathology/*physiopathology ; Male ; *Microcirculation ; Rats ; Rats, Inbred Strains ; *Vasoconstriction ; Venules/pathology
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  • 65
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-05
    Description: Orally administered Trichinella spiralis muscle larvae were rapidly expelled by rat pups suckling an immune dam. The immunity was delivered in the milk; substantial resistance was conferred on normal rat pups suckled for only 24 hours by a Trichinella-immune foster mother. The pups were protected by oral or systemic administration of specific serum antibodies. When infused into a normal lactating dam, these antibodies accumulated in the serum of her suckling pups.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Appleton, J A -- McGregor, D D -- AI 14490/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):70-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474191" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Suckling ; Antibodies/immunology ; Colostrum/immunology ; Female ; *Immunity, Maternally-Acquired ; Immunization, Passive ; Intestinal Diseases, Parasitic/*immunology/parasitology ; Intestinal Mucosa/parasitology ; Milk/*immunology ; Rats ; Trichinella/*immunology/physiology ; Trichinellosis/*immunology/parasitology
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  • 66
    Publication Date: 1984-06-01
    Description: Crude extracts of rat atria reduced the basal amount of aldosterone released from rat zona glomerulosa cells and partially inhibited aldosterone stimulation by adrenocorticotropic hormone and angiotensin II. The destruction of this activity by trypsin suggests that the active factor is a peptide, possibly atrial natriuretic factor. These data suggest that atrial natriuretic factor affects sodium excretion by the kidneys both directly and through the inhibition of aldosterone production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atarashi, K -- Mulrow, P J -- Franco-Saenz, R -- Snajdar, R -- Rapp, J -- New York, N.Y. -- Science. 1984 Jun 1;224(4652):992-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6326267" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/pharmacology ; Aldosterone/*biosynthesis ; Angiotensin II/pharmacology ; Animals ; *Atrial Function ; Dogs ; Female ; Kidney/drug effects/metabolism ; Mineralocorticoid Receptor Antagonists/pharmacology ; Natriuresis/drug effects ; Rats ; Rats, Inbred Strains ; Trypsin/pharmacology
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  • 67
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-12
    Description: A novel eukaryotic hybrid gene has been constructed from the 5' sequence of a rat gene and the bacterial neomycin-resistance gene. After transfection into hamster fibroblasts, the neo transcripts can be induced to high levels by the absence of glucose. Furthermore, this hybrid gene can be regulated by temperature when it is introduced into a temperature-sensitive mutant cell line.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Attenello, J W -- Lee, A S -- CA-27607/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 12;226(4671):187-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6484570" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cricetinae ; DNA, Recombinant ; Drug Resistance, Microbial ; Fibroblasts ; *Gene Expression Regulation ; Genes, Bacterial ; *Genes, Regulator ; Glucose/*pharmacology ; *HSP70 Heat-Shock Proteins ; Membrane Proteins/biosynthesis/*genetics ; Mutation ; Neomycin/pharmacology ; Rats ; Temperature ; Transcription, Genetic ; Transfection
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  • 68
    Publication Date: 1984-08-31
    Description: A T lymphotropic virus found in patients with the acquired immune deficiency syndrome (AIDS) or lymphadenopathy syndrome has been postulated to be the cause of AIDS. Immunological analysis of this retrovirus and its biological properties suggest that it is a member of the family of human T-lymphotropic retroviruses known as HTLV. Accordingly, it has been named HTLV-III. In the present report it is shown by nucleic acid hybridization that sequences of the genome of HTLV-III are homologous to the structural genes (gag, pol, and env) of both HTLV-I and HTLV-II and to a potential coding region called pX located between the env gene and the long terminal repeating sequence that is unique to the HTLV family of retroviruses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arya, S K -- Gallo, R C -- Hahn, B H -- Shaw, G M -- Popovic, M -- Salahuddin, S Z -- Wong-Staal, F -- New York, N.Y. -- Science. 1984 Aug 31;225(4665):927-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089333" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*microbiology ; Base Sequence ; Cloning, Molecular ; Dna ; DNA, Viral ; Deltaretrovirus/classification/*genetics ; Genes ; *Genes, Viral ; Humans ; *Nucleic Acid Hybridization ; RNA, Viral ; Repetitive Sequences, Nucleic Acid
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  • 69
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-11-16
    Description: The magnetic fields associated with penicillin-induced focal epilepsy were measured in laboratory rats. Interictal magnetic spikes were similar to those previously observed in humans with focal seizure disorders. The magnetic fields of the seizure itself displayed both slow and fast phenomena, reversing in direction on opposite sides of the head.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barth, D S -- Sutherling, W -- Beatty, J -- 1-R01-NS20806-01/NS/NINDS NIH HHS/ -- 1K07NS00678-01A1/NS/NINDS NIH HHS/ -- 5-S07 RR07009/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 16;226(4676):855-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6436979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electroencephalography ; *Electromagnetic Fields ; *Electromagnetic Phenomena ; Electrophysiology ; Epilepsies, Partial/*physiopathology ; Humans ; Penicillins/pharmacology ; Rats ; Rats, Inbred Strains ; Seizures/physiopathology
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  • 70
    Publication Date: 1984-06-22
    Description: Spontaneous insulin-dependent diabetes mellitus (IDDM) in the BB rat is associated with the presence of antibodies to a 64-kilodalton rat islet cell protein. These protein antibodies appeared in young animals and remained for as long as 8 weeks before the clinical onset of IDDM. Antibodies to a 64-kilodalton human islet cell protein were found to be associated with human IDDM. Detection of the antibodies may therefore be used to predict an early immune reaction against pancreatic B cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baekkeskov, S -- Dyrberg, T -- Lernmark, A -- AM26190/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 22;224(4655):1348-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6374896" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoantibodies/*immunology ; Diabetes Mellitus, Experimental/*immunology ; Diabetes Mellitus, Type 1/immunology ; Humans ; Islets of Langerhans/*immunology ; Rats ; Rats, Inbred Strains ; Rats, Mutant Strains
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  • 71
    Publication Date: 1984-11-02
    Description: Addition of gonadotropin releasing hormone to cultures of fetal rat pituitary induced differentiation of lactotropes as revealed by immunocytochemistry. Antiserum to luteinizing hormone (LH) (recognizing native LH), but not antiserum to LH-beta (recognizing both native LH and its beta subunit), inhibited this induction. Further addition of highly purified LH-alpha subunit in culture medium also induced lactotrope differentiation. Thus, the alpha subunit may have a specific biological activity of its own with probable practical use in clinical investigations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Begeot, M -- Hemming, F J -- Dubois, P M -- Combarnous, Y -- Dubois, M P -- Aubert, M L -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):566-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6208610" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fetus/physiology ; Glycoprotein Hormones, alpha Subunit ; Humans ; Luteinizing Hormone/immunology/pharmacology/physiology ; Peptide Fragments/*pharmacology/physiology ; Pituitary Gland/*drug effects/growth & development ; Pituitary Hormone-Releasing Hormones/pharmacology ; Pituitary Hormones, Anterior/*pharmacology/physiology ; Rats
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  • 72
    Publication Date: 1984-08-31
    Description: Bromodeoxyuridine (BrdUrd) treatment of the prolactin nonproducing subclone of GH cells (rat pituitary tumor cells) induces amplification of a 20-kilobase DNA fragment including all of the prolactin gene coding sequences. This amplified DNA segment, which is flanked by two unamplified regions, thus designates a unit of BrdUrd-induced amplified sequence. Cloned DNA segments, 10.3 kilobases long, from the 5' end of the rat prolactin gene of BrdUrd-responsive and -nonresponsive cells, were ligated to the thymidine kinase gene of herpes simplex virus type 1 (HSV1TK), and the hybrid DNA was transferred to thymidine kinase-deficient mouse fibroblast cells by transfection. The HSV1TK gene and the rat prolactin gene were amplified together in drug-treated transfectants carrying the hybrid DNA HSV1TK gene and rat prolactin gene of BrdUrd-responsive GH cells. These results suggest that the 10.3-kilobase DNA segment at the 5' end of the rat prolactin gene of BrdUrd-responsive GH cells carries the information for drug-induced gene amplification (amplicon) and that another gene, such as the HSV1TK gene, is also amplified when the latter is placed adjacent to this segment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Biswas, D K -- Hartigan, J A -- Pichler, M H -- CA28218/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 31;225(4665):941-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089335" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Bromodeoxyuridine/*pharmacology ; Cell Line ; Cloning, Molecular ; DNA/*genetics ; DNA, Recombinant ; *Gene Amplification ; Genes, Viral ; Mice ; Prolactin/genetics ; Rats ; Simplexvirus/genetics ; Thymidine Kinase/genetics ; Transfection
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  • 73
    Publication Date: 1984-01-13
    Description: Cultures of human diploid fibroblasts contain cells that respond to exposure to the first component of complement (C1) by initiating DNA synthesis and growth. The plasma membranes of these cells have specific binding sites for the C1q subcomponent of C1. A fluorescence-activated cell sorter was used to isolate a subset of cells with a high affinity for C1q, and the growth and synthesis activities of these high-affinity cells were studied after numerous replications in vitro. These cells synthesize DNA and grow faster than the parent cultures and low-affinity cells, and they produce two to three times as much protein. About 40 percent of their total protein synthesis activity is directed to collagen production, unusually high proportions of collagen types III and V being produced. These properties and the high affinity of the cells for C1q are retained for at least six cell transfers. This phenotype has the properties expected of fibroblasts in healing wounds and inflamed tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bordin, S -- Page, R C -- Narayanan, A S -- DE-02600/DE/NIDCR NIH HHS/ -- DE-03301/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):171-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6691142" target="_blank"〉PubMed〈/a〉
    Keywords: *Antigens, CD44 ; Carrier Proteins ; Cell Division ; Cell Separation ; Cells, Cultured ; Collagen/*biosynthesis/classification ; DNA/*biosynthesis ; Fibroblasts/analysis/cytology/*physiology ; Flow Cytometry ; Gingiva ; Humans ; *Membrane Glycoproteins ; Mitochondrial Proteins ; Phenotype ; *Protein Biosynthesis ; Receptors, Complement/*analysis
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  • 74
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-05-04
    Description: Rats never before exposed to opioids rapidly learned to press a lever for microinjections of morphine into the ventral tegmental area. Challenge by a narcotic antagonist produced no signs of physical dependence. Dependence was not seen after long-term morphine infusions into the ventral tegmentum but was seen after similar infusions into the periventricular gray region. Thus a major rewarding property of morphine is independent of the drug's ability to produce physical dependence. These data challenge models of drug addiction that propose physical dependence as necessary for the rewarding effects of opioids.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bozarth, M A -- Wise, R A -- New York, N.Y. -- Science. 1984 May 4;224(4648):516-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6324347" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Brain Chemistry ; Humans ; Microinjections ; Morphine/*pharmacology ; *Morphine Dependence ; Naloxone/pharmacology ; Rats ; Receptors, Opioid/*physiology ; *Reward
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  • 75
    Publication Date: 1984-04-06
    Description: Polyene antibiotics such as amphotericin and nystatin increase membrane permeability and thus increase the amount of oxygen consumed in active electrolyte transport. In isolated perfused rat kidneys, the polyenes produced extensive injury to the medullary thick ascending limb, a segment of the nephron with limited oxygen supply. This damage was prevented if reabsorptive transport was inhibited by ouabain. Cell death under these circumstances thus appears to be mediated by increased oxygen demand for transport activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brezis, M -- Rosen, S -- Silva, P -- Spokes, K -- Epstein, F H -- AM18078/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 6;224(4644):66-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6322305" target="_blank"〉PubMed〈/a〉
    Keywords: Amphotericin B/adverse effects ; Animals ; Biological Transport, Active/drug effects ; Cell Membrane Permeability/drug effects ; Furosemide/pharmacology ; Glomerular Filtration Rate/drug effects ; Kidney Medulla/*drug effects/pathology ; Loop of Henle/drug effects ; Nystatin/adverse effects ; Ouabain/pharmacology ; Oxygen Consumption/drug effects ; Polyenes/*adverse effects ; Rats ; Sodium/metabolism ; Sodium-Potassium-Exchanging ATPase/metabolism
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  • 76
    Publication Date: 1984-12-14
    Description: Insulin is essential for the accumulation of rat casein messenger RNA (mRNA) in the presence of glucocorticoid and prolactin. The accumulation of certain mRNA's in other tissues has also been linked to insulin action. The present study shows that the accumulation effect on the 25,000 molecular weight rat casein mRNA does not reflect stabilization of the transcript by insulin. Rather, insulin is essential for its synthesis in the presence of glucocorticoid and prolactin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chomczynski, P -- Qasba, P -- Topper, Y J -- New York, N.Y. -- Science. 1984 Dec 14;226(4680):1326-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6390680" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caseins/biosynthesis/*genetics ; Culture Techniques ; *Gene Expression Regulation ; Half-Life ; Hydrocortisone/physiology ; Insulin/*physiology ; Mammary Glands, Animal/metabolism ; Molecular Weight ; Prolactin/physiology ; RNA, Messenger/physiology ; Rats ; Transcription, Genetic
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  • 77
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-08-24
    Description: Yohimbine hydrochloride, an alpha 2-adrenoceptor antagonist, increased sexual motivation in male rats as evidenced by increased mounting performance in mating tests conducted after genital anesthetization, increased percentage of male rats ejaculating in their first heterosexual encounter, and induction of copulatory behavior in sexually inactive male rats. These observations lead to the suggestion that alpha-adrenoceptors are important modulators of sexual arousal in intact male rats. These results indicate that pharmacological treatment of sexual (libido) dysfunction may be useful.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clark, J T -- Smith, E R -- Davidson, J M -- MH 21178/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 24;225(4664):847-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474156" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aphrodisiacs/*pharmacology ; Copulation/drug effects ; Ejaculation/drug effects ; Male ; Motivation/drug effects ; Rats ; Receptors, Adrenergic/drug effects ; Sexual Behavior, Animal/*drug effects ; Yohimbine/*pharmacology
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  • 78
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-08-24
    Description: Norway rat pups have an enhanced olfactory bulb response to a familiar odor. A specific complex of glomeruli showed increased carbon-14-labeled 2-deoxy-D-glucose uptake in response to peppermint odor in 19-day-old pups exposed to peppermint on days 1 to 18 after birth, relative to control pups that had been exposed to clean air. The increased activity was not due to increased respiration of the familiar odor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coopersmith, R -- Leon, M -- MH 0037/MH/NIMH NIH HHS/ -- RRO 1192/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 24;225(4664):849-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474157" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Deoxy Sugars/*metabolism ; Deoxyglucose/*metabolism ; *Odors ; Oils, Volatile ; Olfactory Bulb/*metabolism ; Plant Extracts ; *Plant Oils ; Rats ; Respiration ; *Smell
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  • 79
    Publication Date: 1984-05-11
    Description: Hamster cells infected with highly oncogenic human adenovirus type 12 (Ad12) were resistant to lysis by natural killer cells and macrophages, compared to cells infected with nononcogenic adenovirus type 2 (Ad2). The data suggest that early adenovirus gene expression in hamster cells results in preferential survival of Ad12, compared to Ad2, infected cells in vivo, thus providing an explanation for the differences in the oncogenicities of these two transforming viruses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cook, J L -- Lewis, A M Jr -- CA 31732/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 May 11;224(4649):612-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6710160" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviruses, Human/*immunology ; Animals ; Cell Transformation, Neoplastic/metabolism ; Cell Transformation, Viral ; Cricetinae ; Humans ; Immunity, Cellular ; Killer Cells, Natural/*physiology ; Macrophages/*physiology ; Mesocricetus ; Oncogenic Viruses/*immunology ; Rats
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  • 80
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-07
    Description: The genome of the small human virus serologically associated with erythrocyte aplasia and erythema infectiosum (fifth disease) is shown to be a linear, nonpermuted, single-stranded DNA molecule with self-priming hairpin termini, properties which are characteristic of the genomes of the family Parvoviridae. This human parvovirus chromosome was molecularly cloned into bacterial plasmid vectors and the cloned DNA was used to explore its relatedness to other mammalian parvovirus serotypes by DNA:DNA hybridization. It is not related to the human adeno-associated viruses but does show a distant evolutionary relationship to genomes of the helper-independent parvoviruses of rodents. This strongly suggests that it is an autonomous parvovirus, and as such is the first example of a member of this group of common animal pathogens to cause disease in man.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cotmore, S F -- Tattersall, P -- CA29303/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Dec 7;226(4679):1161-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095448" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular ; DNA, Single-Stranded/analysis ; DNA, Viral/*analysis ; DNA-Directed DNA Polymerase ; Dependovirus/genetics ; Escherichia coli/enzymology ; Nucleic Acid Denaturation ; Nucleic Acid Hybridization ; Parvoviridae/*genetics ; Plasmids ; Templates, Genetic
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  • 81
    Publication Date: 1984-11-23
    Description: A cloned complementary DNA derived from a messenger RNA transiently present at low abundance levels in early chick embryonic skeletal muscle hybridizes to a messenger RNA present at high abundance levels in cardiac muscle. Genomic DNA hybridization and nucleotide sequence identity of complementary DNA's from both heart and skeletal muscle demonstrate that the messenger RNA's from both sources are encoded by the same gene. The encoded polypeptide is a troponin T sequence which is probably a cardiac isoform. This single copy troponin T isogene is governed by different regulatory programs in heart and skeletal muscle differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, T A -- Ordahl, C P -- R01-GM32018/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 23;226(4677):979-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095446" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chick Embryo ; Chickens ; DNA Restriction Enzymes ; *Gene Expression Regulation ; *Genes ; Heart/*embryology ; Muscles/*embryology/metabolism ; Myocardium/metabolism ; Nucleic Acid Hybridization ; RNA, Messenger/genetics ; Troponin/*genetics ; Troponin T
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-21
    Description: The development of most regions of the vertebrate nervous system includes a distinct phase of neuronal degeneration during which a substantial proportion of the neurons initially generated die. This degeneration primarily adjusts the magnitude of each neuronal population to the size or functional needs of its projection field, but in the process it seems also to eliminate many neurons whose axons have grown to either the wrong target or an inappropriate region within the target area. In addition, many connections that are initially formed are later eliminated without the death of the parent cell. In most cases such process elimination results in the removal of terminal axonal branches and hence serves as a mechanism to "fine-tune" neuronal wiring. However, there are now also several examples of the large-scale elimination of early-formed pathways as a result of the selective degeneration of long axon collaterals. Thus, far from being relatively minor aspects of neural development, these regressive phenomena are now recognized as playing a major role in determining the form of the mature nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cowan, W M -- Fawcett, J W -- O'Leary, D D -- Stanfield, B B -- EY-03653/EY/NEI NIH HHS/ -- NS-18506/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 21;225(4668):1258-65.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474175" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Brain/*growth & development ; Cricetinae ; *Nerve Degeneration ; Nerve Growth Factors/pharmacology ; Nervous System/*growth & development ; Purkinje Cells/physiology ; Rats ; Retina/growth & development ; Superior Colliculi/growth & development ; Synapses/physiology ; Visual Pathways/growth & development
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  • 83
    Publication Date: 1984-08-10
    Description: The gene for the circumsporozoite (CS) protein of Plasmodium falciparum has been cloned and its nucleotide sequence determined. The gene encodes a protein of 412 amino acids as deduced from the nucleotide sequence. The protein contains 41 tandem repeats of a tetrapeptide, 37 of which are Asn-Ala-Asn-Pro and four of which are Asn-Val-Asp-Pro. Monoclonal antibodies against the CS protein of Plasmodium falciparum were inhibited from binding to the protein by synthetic peptides of the repeat sequence. The CS protein of Plasmodium falciparum and the CS protein of a simian malaria parasite, Plasmodium knowlesi, have two regions of homology, one of which is present on either side of the repeat. One region contains 12 of 13 identical amino acids. Within the nucleotide sequence of this region, 25 of 27 nucleotides are conserved. The conservation of these regions in parasites widely separated in evolution suggests that they may have a function such as binding to liver cells and may represent an invariant target for immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dame, J B -- Williams, J L -- McCutchan, T F -- Weber, J L -- Wirtz, R A -- Hockmeyer, W T -- Maloy, W L -- Haynes, J D -- Schneider, I -- Roberts, D -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):593-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6204383" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal/immunology ; Antigens, Surface/*genetics/immunology ; Base Sequence ; Epitopes/genetics ; *Genes ; Humans ; Liver/parasitology ; Malaria/*immunology ; Plasmodium/genetics ; Plasmodium falciparum/*genetics/immunology ; *Protozoan Proteins
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  • 84
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-05-25
    Description: The structure of this pleiotropic activator of gene transcription in bacteria and its interaction sites at promoter DNA's as well as the role of this protein in the RNA polymerase-promoter interactions are reviewed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Crombrugghe, B -- Busby, S -- Buc, H -- New York, N.Y. -- Science. 1984 May 25;224(4651):831-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6372090" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Crystallography ; DNA, Bacterial/metabolism ; DNA-Directed RNA Polymerases/metabolism ; Galactose/genetics ; *Gene Expression Regulation ; Lac Operon ; Operon ; Protein Conformation ; Receptors, Cyclic AMP/*physiology ; *Transcription, Genetic
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  • 85
    Publication Date: 1984-08-03
    Description: The nucleotide sequence of a human Blym-1 transforming gene activated in a Burkitt's lymphoma cell line was determined. This sequence predicts a small protein of 58 amino acids that is 33 percent identical to the predicted product of chicken Blym-1, the activated transforming gene of chicken B cell lymphomas. Both the human and chicken Blym-1 genes exhibit significant identity to an amino-terminal region of transferrins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diamond, A -- Devine, J M -- Cooper, G M -- CA 07250/CA/NCI NIH HHS/ -- CA 28946/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 3;225(4661):516-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6330897" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Burkitt Lymphoma/*genetics ; Cell Line ; *Cell Transformation, Neoplastic ; DNA Restriction Enzymes ; Humans ; *Oncogenes ; Structure-Activity Relationship ; Transcription, Genetic ; Transferrin/genetics
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  • 86
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-01
    Description: In several experimental systems the genomic capacity in specialized cells can be assessed by examining the activation of dormant genes. Since some of these specialized cells can be induced to change cell phenotype, all cell specializations do not necessarily involve irreversible genetic changes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiBerardino, M A -- Hoffner, N J -- Etkin, L D -- GM 23635/GM/NIGMS NIH HHS/ -- GM 31479/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 1;224(4652):946-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6719127" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura ; *Cell Differentiation ; Cell Fusion ; Cell Transformation, Neoplastic/metabolism ; Chickens ; Chromatin/physiology ; DNA/genetics/metabolism ; Drosophila ; Embryo, Mammalian/physiology ; Embryo, Nonmammalian ; Extremities/growth & development ; *Gene Expression Regulation ; Humans ; Hybrid Cells ; Iris/growth & development ; Methylation ; Mice ; Nuclear Transfer Techniques ; Phenotype ; Rats ; Xenopus
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  • 87
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-04-06
    Description: A complementary DNA clone for an alpha-tubulin has been isolated from a mouse testis complementary DNA library. The untranslated 3' end of this complementary DNA is homologous to two RNA transcripts present in postmeiotic cells of the testis but absent from meiotic cells and from several tissues including brain. The temporal expression of this alpha-tubulin complementary DNA provides evidence for the haploid expression of a mammalian structural gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Distel, R J -- Kleene, K C -- Hecht, N B -- GM 29224/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 6;224(4644):68-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6701535" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Cloning, Molecular ; DNA/genetics ; Drosophila ; Gene Expression Regulation ; Haploidy ; Male ; Mice ; Nucleic Acid Hybridization ; Rats ; Spermatids/metabolism ; Spermatogenesis ; Spermatozoa/physiology ; Testis/*metabolism ; Tubulin/*genetics
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  • 88
    Publication Date: 1984-01-20
    Description: A radioiodinated ligand that binds to muscarinic acetylcholine receptors was shown to distribute in the brain by a receptor-mediated process. With single-photon-emission imaging techniques, radioactivity was detected in the cerebrum but not in the cerebellum, whereas with a flow-limited radiotracer, radioactivity was detected in cerebrum and cerebellum. Single-photon-emission computed tomography showed good definition of the caudate putamen and cortex in man.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eckelman, W C -- Reba, R C -- Rzeszotarski, W J -- Gibson, R E -- Hill, T -- Holman, B L -- Budinger, T -- Conklin, J J -- Eng, R -- Grissom, M P -- New York, N.Y. -- Science. 1984 Jan 20;223(4633):291-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6608148" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Brain Chemistry ; Cats ; Caudate Nucleus/analysis ; Cerebellum/analysis ; Dogs ; Humans ; Putamen/analysis ; Quinuclidines/metabolism ; Quinuclidinyl Benzilate/metabolism ; Radioligand Assay ; Rats ; Receptors, Muscarinic/*analysis/metabolism ; Tomography, Emission-Computed
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-22
    Description: The pathophysiology of brain dysfunction was studied with an animal model of chronic alcoholism. Rats were fed a liquid diet with or without ethanol for 20 weeks and then the diet without ethanol for three more weeks. Hippocampal slices were prepared and intracellular recordings were obtained from dentate granule and CA1 cells. Significant depression of orthodromically elicited inhibitory postsynaptic potentials and postspike afterhyperpolarizations was observed in neurons from ethanol-exposed animals. No differences were observed in other active or passive membrane characteristics. These results suggest that a loss of neuronal inhibition could contribute to brain dysfunction in chronic alcoholism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Durand, D -- Carlen, P L -- New York, N.Y. -- Science. 1984 Jun 22;224(4655):1359-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6328654" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Alcoholism/physiopathology ; Animals ; Calcium/physiology ; Ethanol/*pharmacology ; Humans ; Ion Channels/drug effects ; Male ; Membrane Potentials/drug effects ; Neurons/*drug effects ; Rats ; Rats, Inbred Strains
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  • 90
    Publication Date: 1984-02-03
    Description: The nucleotide sequences of the six regions within the normal human cellular locus (c-sis) that correspond to the entire transforming region of the simian sarcoma virus (SSV) genome (v-sis) were determined. The regions are bounded by acceptor and donor splice sites and, except for region 6, resemble exons. Region 6 lacks a 3' donor splice site and terminates -5 base pairs from the 3' v-sis-helper-viral junction. This is consistent with a model proposing that SSV was generated by recombination between proviral DNA of a simian sarcoma associated virus and proto-sis and that introns were spliced out subsequently from a fused viral-sis messenger RNA. This also suggests that the 3' recombination occurred within an exon of the woolly monkey (Lagothrix) genome. The open reading frames predicting the v-sis and c-sis gene products coincide with the stop codon of c-sis located 123 nucleotides into the fifth region of homology. The overall nucleotide homology was 91 percent with substitutions mainly in the third codon positions within the open reading frame and with greatest divergence within the untranslated 3' portion of the sequences. The predicted protein products for v-sis and c-sis are 93 percent homologous. The predicted c-sis gene product is identical in 31 of 31 amino acids to one of the published sequences of platelet-derived growth factor. Thus, c-sis encodes one chain of human platelet-derived growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Josephs, S F -- Guo, C -- Ratner, L -- Wong-Staal, F -- New York, N.Y. -- Science. 1984 Feb 3;223(4635):487-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6318322" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Cell Transformation, Neoplastic ; Cell Transformation, Viral ; Codon ; *Genes, Viral ; Humans ; *Oncogenes ; Platelet-Derived Growth Factor/*genetics ; RNA Splicing ; RNA, Messenger/genetics ; Recombination, Genetic ; Retroviridae/*genetics ; Sarcoma Virus, Woolly Monkey/*genetics ; Viral Proteins/genetics
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  • 91
    Publication Date: 1984-09-14
    Description: Nuclear estrogen receptor from MCF-7 cells undergoes a time-dependent, hormone-inducible transformation to a form that is less extractable from nuclei and less exchangeable with ligand. This receptor-modifying, intranuclear event is independent of receptor loss (processing) and appears associated with hormone responsiveness (progesterone-receptor induction) in these cells. The magnitude of receptor loss, however, is variable and apparently not a prerequisite for hormone action to induce progesterone receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasid, A -- Strobl, J S -- Huff, K -- Greene, G L -- Lippman, M E -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1162-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474170" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/*metabolism ; Cell Nucleus/metabolism ; Cells, Cultured ; Female ; Humans ; Receptors, Estradiol ; Receptors, Estrogen/*metabolism ; Receptors, Progesterone/biosynthesis ; Time Factors
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  • 92
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-14
    Description: A human papovavirus, JCV, is the etiologic agent of the fatal demyelinating disease, progressive multifocal leukoencephalopathy. The JCV 98-base-pair tandem repeats, located to the late side of the viral replication origin, were shown to be a transcriptional regulatory element with enhancer-like activity in human fetal glial cells. These tandem repeats share significant homology with the 82-nucleotide rat brain-specific identifier RNA sequence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kenney, S -- Natarajan, V -- Strike, D -- Khoury, G -- Salzman, N P -- New York, N.Y. -- Science. 1984 Dec 14;226(4680):1337-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095453" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Brain/*microbiology ; Fetus ; Gene Amplification ; Gene Expression Regulation ; Genes, Viral ; Humans ; JC Virus/*genetics ; Neuroglia/microbiology ; *Operon ; Polyomavirus/*genetics
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  • 93
    Publication Date: 1984-08-03
    Description: Grafts of fetal septal tissue rich in cholinergic neurons were implanted as a dissociated cell suspension into the depth of the hippocampal formation in aged rats with severe impairments in spatial learning abilities. After 2 1/2 to 3 months, the rats with grafts, but not the controls, had improved their performance in a spatial learning test. Their improvement was due, at least in part, to an increased ability to use spatial cues in the task. In all animals the grafts had produced an extensive acetylcholinesterase-positive terminal network in the surrounding host hippocampal formation. Thus, the action of cholinergic neurons in the graft onto elements in the host hippocampal circuitry may be a necessary, but perhaps not sufficient, prerequisite for the observed functional recovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gage, F H -- Bjorklund, A -- Stenevi, U -- Dunnett, S B -- Kelly, P A -- AG 03766/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 3;225(4661):533-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6539949" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Disease Models, Animal ; Female ; Fetus ; Hippocampus/embryology/growth & development/*transplantation ; Humans ; *Learning ; Memory Disorders/*physiopathology ; Rats ; Rats, Inbred Strains
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 94
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galli, S J -- New York, N.Y. -- Science. 1984 Oct 19;226(4672):352-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6484574" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Neoplasms, Experimental/classification/*pathology ; Rats
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 95
    Publication Date: 1984-05-04
    Description: Peripheral blood lymphocytes from patients with the acquired immunodeficiency syndrome (AIDS) or with signs or symptoms that frequently precede AIDS (pre-AIDS) were grown in vitro with added T-cell growth factor and assayed for the expression and release of human T-lymphotropic retroviruses (HTLV). Retroviruses belonging to the HTLV family and collectively designated HTLV-III were isolated from a total of 48 subjects including 18 of 21 patients wih pre-AIDS, three of four clinically normal mothers of juveniles with AIDS, 26 of 72 adult and juvenile patients with AIDS, and from one of 22 normal male homosexual subjects. No HTLV-III was detected in or isolated from 115 normal heterosexual subjects. The number of HTLV-III isolates reported here underestimates the true prevalence of the virus since many specimens were received in unsatisfactory condition. Other data show that serum samples from a high proportion of AIDS patients contain antibodies to HTLV-III. That these new isolates are members of the HTLV family but differ from the previous isolates known as HTLV-I and HTLV-II is indicated by their morphological, biological, and immunological characteristics. These results and those reported elsewhere in this issue suggest that HTLV-III may be the primary cause of AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallo, R C -- Salahuddin, S Z -- Popovic, M -- Shearer, G M -- Kaplan, M -- Haynes, B F -- Palker, T J -- Redfield, R -- Oleske, J -- Safai, B -- New York, N.Y. -- Science. 1984 May 4;224(4648):500-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6200936" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/blood/*microbiology ; Adult ; Antigens, Viral/analysis ; Cells, Cultured ; Cytopathogenic Effect, Viral ; Deltaretrovirus/*isolation & purification/physiology/ultrastructure ; Female ; Homosexuality ; Humans ; Immune Sera/pharmacology ; Interferon Type I/immunology ; Male ; RNA-Directed DNA Polymerase/metabolism ; Risk ; T-Lymphocytes/microbiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 96
    Publication Date: 1984-11-02
    Description: Smooth muscle cells with 4C (double diploid) DNA content have been found in major arteries. The proportion of 4C cells increases with normal aging and with hypertension. These cells may represent a state of arrest at the G2 phase of the cell cycle or may be examples of true tetraploidy. Flow cytometric cell sorting was used to isolate 4C smooth muscle cells from the rat aorta, and the cells were cultured. Flow cytometry, Feulgen microdensitometry, and karyotyping of the progeny of the 4C cells established the presence of true tetraploid cells. These findings demonstrate the presence of reproductively viable tetraploid cells in a normal mammalian tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldberg, I D -- Rosen, E M -- Shapiro, H M -- Zoller, L C -- Myrick, K -- Levenson, S E -- Christenson, L -- 5-P01-CA-12662/CA/NCI NIH HHS/ -- AG00599/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):559-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494901" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta, Thoracic/analysis/*cytology ; Cells, Cultured ; DNA/analysis ; Flow Cytometry ; Humans ; Karyotyping ; Muscle, Smooth, Vascular/analysis/*cytology ; *Polyploidy ; Rats ; Rats, Inbred Strains
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 97
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-05
    Description: The human malarial parasite Plasmodium falciparum can produce surface protrusions (knobs) on infected erythrocytes; however, long-term culturing of the parasite results in the appearance of knobless cells. In this study it was found that a knob-producing clone lost the ability to produce knobs in vitro. Furthermore, a clone not producing knobs derived from the knob-producing clone regained the capacity to produce knobby cells in vitro. Certain parasite proteins were associated with the knobby phenotype but not with the knobless type. These results indicate that the parasites change in vitro in a spontaneous and reversible manner independent of immunological selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gritzmacher, C A -- Reese, R T -- AI 18695/AI/NIAID NIH HHS/ -- DRR 00833/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6382613" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Clone Cells ; Erythrocytes/*parasitology/ultrastructure ; Humans ; Mutation ; Phenotype ; Plasmodium falciparum/analysis/genetics/growth & development/*physiology ; Proteins/analysis
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 98
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-07-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1984 Jul 20;225(4659):302-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6740312" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Fetus/*physiology ; Humans ; Infant, Newborn ; Infant, Premature ; Learning/*physiology ; Male ; Pregnancy ; Rats
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-05-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1984 May 11;224(4649):588-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6369540" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chickens ; DNA, Neoplasm/genetics ; *Gene Expression Regulation ; Globins/genetics ; Insulin/genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
    Publication Date: 1984-11-02
    Description: The motile activity of growth cones of specific identified neurons is inhibited by the neurotransmitter serotonin, although other identified neurons are unaffected. As a consequence, affected neurons are unable to form electrical synapses, whereas other neurons whose growth is unaffected can still interconnect. This result demonstrates that neurotransmitters can play a prominent role in regulating neuronal architecture and connectivity in addition to their classical role in neurotransmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haydon, P G -- McCobb, D P -- Kater, S B -- HD18577/HD/NICHD NIH HHS/ -- NS15350/NS/NINDS NIH HHS/ -- NS18819/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):561-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093252" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Population Groups ; Animals ; Cells, Cultured ; Neurons/*drug effects/growth & development ; Serotonin/*pharmacology ; Snails ; Synapses/*drug effects ; Synaptic Transmission
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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