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  • Articles  (13)
  • Rats  (13)
  • Engineering General
  • 1985-1989  (5)
  • 1980-1984  (8)
  • Computer Science  (13)
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  • Articles  (13)
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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1988-09-09
    Description: A karyotypic analysis was performed on seven independently derived clones of primary rat embryo cells transformed by the ras oncogene plus the cooperating oncogene myc. The transfected oncogenes were sometimes present in amplified copy number, with heterogeneity in the levels of amplification. Some chromosomal features, such as aberrantly banding regions and double-minute chromosomes, typical of cells carrying amplified genes, were also seen in three of the seven cell lines. Underlying this heterogeneity there was an unexpected finding. All seven lines showed a common integration site for ras on the q arm of rat chromosome 3 (3q12), though some lines also had other sites of integration. In four of the lines integration of ras was accompanied by deletion of the p arm of chromosome 3 or its possible translocation to chromosome 12.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McKenna, W G -- Nakahara, K -- Muschel, R J -- New York, N.Y. -- Science. 1988 Sep 9;241(4871):1325-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Radiation Oncology, University of Pennsylvania School of Medicine, Philadelphia 19104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3045971" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; Gene Amplification ; *Genes, ras ; Oncogenes ; Rats ; Recombination, Genetic ; Transformation, Genetic ; Translocation, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1983-09-16
    Description: A twofold thickening of capillary basement membranes of rat retinas resulting from dietary galactose was prevented by sorbinil, an inhibitor of aldose reductase. Since the basement membrane thickening was ultrastructurally similar to that typical of diabetic retinopathy, it may indicate changes in vessel permeability and susceptibility to hemorrhage. Galactosemic rats should be useful models for studying basement membrane-related complications of diabetes and for examining the potential biochemical regulation of basement membrane synthesis by aldose reductase inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Robison, W G Jr -- Kador, P F -- Kinoshita, J H -- New York, N.Y. -- Science. 1983 Sep 16;221(4616):1177-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612330" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basement Membrane/*pathology ; Capillaries/pathology ; Diabetic Retinopathy/etiology ; Disease Models, Animal ; Galactosemias/drug therapy/*pathology ; Imidazoles/*therapeutic use ; *Imidazolidines ; Male ; Rats ; Rats, Inbred Strains ; Retinal Vessels/*pathology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1987-01-16
    Description: Digital imaging of calcium indicator signals (fura-2 fluorescence) from single cardiac cells has revealed different subcellular patterns of cytoplasmic calcium ion concentration ([Ca2+]i) that are associated with different types of cellular appearance and behavior. In any population of enzymatically isolated rat heart cells, there are mechanically quiescent cells in which [Ca2+]i is spatially uniform, constant over time, and relatively low; spontaneously contracting cells, which have an increased [Ca2+]i, but in which the spatial uniformity of [Ca2+]i is interrupted periodically by spontaneous propagating waves of high [Ca2+]i; and cells that are hypercontracted (rounded up) and that have higher levels of [Ca2+]i than the other two types. The observed cellular and subcellular heterogeneity of [Ca2+]i in isolated cells indicates that experiments performed on suspensions of cells should be interpreted with caution. The spontaneous [Ca2+]i fluctuations previously observed without spatial resolution in multicellular preparations may actually be inhomogeneous at the subcellular level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wier, W G -- Cannell, M B -- Berlin, J R -- Marban, E -- Lederer, W J -- HL25675/HL/NHLBI NIH HHS/ -- HL29473/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 Jan 16;235(4786):325-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3798114" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Benzofurans ; Calcium/*metabolism ; Cell Compartmentation ; Fura-2 ; In Vitro Techniques ; Myocardial Contraction ; Myocardium/*cytology/metabolism ; Rats ; Spectrometry, Fluorescence ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-11-06
    Description: Stimulation of one side of the olfactory system during training with odor-milk pairings in neonatal rats results in their ability to recall an odor memory by using the trained but not the untrained side of the brain. In 12-day-old rats, olfactory learning can be recalled by stimulation of either the trained or untrained side. The development of bilateral recall reflects the maturation of olfactory commissural pathways that provide access to the olfactory memory stored on the contralateral side. Furthermore, the commissural pathways need not be present at the time of memory formation but can establish new and specific access to already existing olfactory memories.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kucharski, D -- Hall, W G -- HD17458/HD/NICHD NIH HHS/ -- MH09436/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):786-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Duke University, Durham, NC 27706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3672125" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Animals, Newborn ; Brain/growth & development/physiology ; Central Nervous System/*growth & development ; Functional Laterality ; *Memory ; Milk ; *Odors ; Olfactory Pathways/*growth & development/physiology ; Rats
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1984-03-09
    Description: Soil environmentally contaminated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was given by gavage to guinea pigs and rats. The development of a characteristic clinicopathologic syndrome in guinea pigs, the induction of aryl hydrocarbon hydroxylase in rats, and the presence of TCDD in the livers of both species show that TCDD in soil exhibits high biological availability after ingestion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McConnell, E E -- Lucier, G W -- Rumbaugh, R C -- Albro, P W -- Harvan, D J -- Hass, J R -- Harris, M W -- New York, N.Y. -- Science. 1984 Mar 9;223(4640):1077-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695194" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aryl Hydrocarbon Hydroxylases/biosynthesis ; Biological Availability ; Body Weight/drug effects ; Cytochrome P-450 Enzyme System/metabolism ; Dioxins/*metabolism ; Eating ; Enzyme Induction ; Female ; Guinea Pigs ; Intestinal Absorption ; Liver/drug effects ; Male ; Microsomes, Liver/enzymology ; Organ Size/drug effects ; Rats ; Rats, Inbred Strains ; *Soil Pollutants/toxicity ; Tetrachlorodibenzodioxin/*metabolism/toxicity ; Thymus Gland/drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1984-01-13
    Description: The cytotoxic activity of natural killer cells was investigated in rats subjected to one of two inescapable footshock stress paradigms, both of which induce analgesia, but only one via activation of opioid mechanisms. Splenic natural killer cell activity was suppressed by the opioid, but not the nonopioid, form of stress. This suppression was blocked by the opioid antagonist naltrexone. Similar suppression of natural killer activity was induced by high doses of morphine. These results suggest that endogenous opioid peptides mediate the suppressive effect of certain forms of stress on natural killer cell cytotoxicity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shavit, Y -- Lewis, J W -- Terman, G W -- Gale, R P -- Liebeskind, J C -- MH15795/MH/NIMH NIH HHS/ -- NS07628/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):188-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6691146" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cytotoxicity, Immunologic/drug effects ; Dose-Response Relationship, Drug ; Endorphins/*physiology ; Female ; Killer Cells, Natural/*immunology ; Morphine/*pharmacology ; Naltrexone/pharmacology ; Rats ; Rats, Inbred F344 ; Stress, Physiological/*immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1984-10-26
    Description: Intravenous infusion of morphine sulfate in rats for 24 hours produced marked opioid dependence, manifested by a series of well-documented signs appearing after injection of the opiate antagonist naloxone. Treatment of rats with naloxonazine significantly reduced the analgesia associated with the morphine infusions for more than 24 hours. Furthermore, 14 of 16 withdrawal signs observed in naloxonazine-treated rats were virtually identical to those in rats that received morphine alone. These results raise the possibility that different receptor mechanisms mediate morphine analgesia and many of the withdrawal signs associated with morphine dependence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ling, G S -- MacLeod, J M -- Lee, S -- Lockhart, S H -- Pasternak, G W -- DA 002615/DA/NIDA NIH HHS/ -- NS 00415/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 26;226(4673):462-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6541807" target="_blank"〉PubMed〈/a〉
    Keywords: *Analgesia ; Animals ; Humans ; Male ; Morphine/*pharmacology ; Naloxone/*analogs & derivatives/pharmacology ; Rats ; Rats, Inbred Strains ; Substance Withdrawal Syndrome ; *Substance-Related Disorders
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  • 8
    Publication Date: 1981-11-27
    Description: A simple quantitative autoradiographic technique for the study of neurotransmitter receptors that includes the use of a tritium-sensitive film permits saturation, kinetic, and competition studies of brain samples as small as 0.01 cubic millimeter. This technique was used to study [3H]muscimol binding in rat brain. Unilateral gamma-aminobutyric acid receptor supersensitivity was observed in the substantia nigra pars reticulata after production of localized lesions of the ipsilateral corpus striatum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Penney, J B Jr -- Pan, H S -- Young, A B -- Frey, K A -- Dauth, G W -- NS00420-02/NS/NINDS NIH HHS/ -- NS00464-02/NS/NINDS NIH HHS/ -- NS15140-02/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 27;214(4524):1036-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; Brain/drug effects/*metabolism ; Kainic Acid/pharmacology ; Kinetics ; Muscimol/*metabolism ; Oxazoles/*metabolism ; Rats ; Receptors, Drug/*metabolism ; Receptors, GABA-A ; Tritium
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  • 9
    Publication Date: 1982-09-24
    Description: Transplantation of preoptic tissue from male rat neonates into the preoptic area of female littermates increased masculine and feminine sexual behavior in the recipients during adulthood. This suggests that functional connections develop between the transplanted neural tissue and the host brain. A new intraparenchymal brain transplantation technique was used to achieve these results.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arendash, G W -- Gorski, R A -- HD-01182/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 24;217(4566):1276-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7112132" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/physiology ; Animals ; Brain/*physiology ; Female ; Hypothalamus/*physiology ; Male ; Nerve Tissue/*transplantation ; Preoptic Area/*physiology ; Rats ; Sex Differentiation ; Sexual Behavior, Animal/*physiology ; Testosterone/pharmacology
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  • 10
    Publication Date: 1982-08-20
    Description: Concentrations of prolactin and growth hormone in the serum of rats were significantly increased by morphine. Dose response studies demonstrated that maximum prolactin release required lower doses of morphine than those needed for the maximum growth hormone response. Selective blockade of mu 1 (high affinity) opiate receptor with the irreversible antagonist naloxazone reduced morphine-induced peak concentrations of prolactin by 80 percent while increasing peak growth hormone levels by 250 percent. These results suggest different receptor mechanisms for the opiate modulation of the two hormones. The mu 1 (high affinity) receptor sites appear to mediate the morphine-induced release of prolactin but not growth hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spiegel, K -- Kourides, I A -- Pasternak, G W -- CA 23185/CA/NCI NIH HHS/ -- DA 002615/DA/NIDA NIH HHS/ -- P32 GM07547/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):745-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6285470" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Growth Hormone/*secretion ; Male ; Morphine/*pharmacology ; Naloxone/analogs & derivatives/pharmacology ; Prolactin/*secretion ; Radioimmunoassay ; Rats ; Rats, Inbred Strains ; Receptors, Opioid/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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