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  • 1
    Publication Date: 1985-05-31
    Description: Cerebral cortex samples from patients with Alzheimer's disease and from rats after experimental cholinergic denervation of the cerebral cortex exhibited reductions in the presynaptic marker choline acetyltransferase activity and in the number of M2 muscarine receptors, with no change in the number of M1 receptors. These results are in keeping with evidence that M2 receptors function in cholinergic nerve terminals to regulate the release of acetylcholine, whereas M1 receptors are located on postsynaptic cells and facilitate cellular excitation. New M1-selective agonists and M2-selective antagonists directed at post- or presynaptic sites deserve consideration as potential agents for the treatment of the disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mash, D C -- Flynn, D D -- Potter, L T -- HLO-7188/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1985 May 31;228(4703):1115-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3992249" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Alzheimer Disease/*metabolism ; Animals ; Cerebral Cortex/*metabolism ; Choline O-Acetyltransferase/*metabolism ; Cholinergic Fibers/physiology ; Denervation ; Humans ; Male ; Oxotremorine ; Quinuclidinyl Benzilate ; Rats ; Rats, Inbred Strains ; Receptors, Muscarinic/*metabolism ; Synaptic Membranes/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1991-06-14
    Description: The identification of specialized areas in the mammalian neocortex, such as the primary visual or somatosensory cortex, is based on distinctions in architectural and functional features. The extent to which certain features that distinguish neocortical areas in rats are prespecified or emerge as a result of epigenetic interactions was investigated. Late embryonic visual cortex transplanted to neonatal somatosensory cortex was later assayed for "barrels," anatomically identified functional units unique to somatosensory cortex, and for boundaries of glycoconjugated molecules associated with barrels. Barrels and boundaries form in transplanted visual cortex and are organized in an array that resembles the pattern in the normal barrelfield. These findings show that different regions of the developing neocortex have similar potentials to differentiate features that distinguish neocortical areas and contribute to their unique functional organizations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schlaggar, B L -- O'Leary, D D -- P01 NS17763/NS/NINDS NIH HHS/ -- R01 EY07025/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1991 Jun 14;252(5012):1556-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Neurobiology Laboratory, Salk Institute, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2047863" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholinesterase/*analysis ; Aging ; Animals ; Animals, Newborn ; Brain Tissue Transplantation/*physiology ; Fetal Tissue Transplantation/physiology ; Glycoconjugates/analysis ; Microscopy, Fluorescence ; Neurons/cytology/enzymology/physiology ; Rats ; Rats, Inbred Strains ; Reference Values ; Somatosensory Cortex/cytology/growth & development/*physiology ; Transplantation, Heterotopic ; Visual Cortex/cytology/*physiology/transplantation
    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: 2009-12-08
    Description: Several common genetic variations have been associated with type 2 diabetes, but the exact disease mechanisms are still poorly elucidated. Using congenic strains from the diabetic Goto-Kakizaki rat, we identified a 1.4-megabase genomic locus that was linked to impaired insulin granule docking at the plasma membrane and reduced beta cell exocytosis. In this locus, Adra2a, encoding the alpha2A-adrenergic receptor [alpha(2A)AR], was significantly overexpressed. Alpha(2A)AR mediates adrenergic suppression of insulin secretion. Pharmacological receptor antagonism, silencing of receptor expression, or blockade of downstream effectors rescued insulin secretion in congenic islets. Furthermore, we identified a single-nucleotide polymorphism in the human ADRA2A gene for which risk allele carriers exhibited overexpression of alpha(2A)AR, reduced insulin secretion, and increased type 2 diabetes risk. Human pancreatic islets from risk allele carriers exhibited reduced granule docking and secreted less insulin in response to glucose; both effects were counteracted by pharmacological alpha(2A)AR antagonists.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosengren, Anders H -- Jokubka, Ramunas -- Tojjar, Damon -- Granhall, Charlotte -- Hansson, Ola -- Li, Dai-Qing -- Nagaraj, Vini -- Reinbothe, Thomas M -- Tuncel, Jonatan -- Eliasson, Lena -- Groop, Leif -- Rorsman, Patrik -- Salehi, Albert -- Lyssenko, Valeriya -- Luthman, Holger -- Renstrom, Erik -- New York, N.Y. -- Science. 2010 Jan 8;327(5962):217-20. doi: 10.1126/science.1176827. Epub 2009 Nov 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lund University Diabetes Centre, Malmo, SE-20502 Malmo, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965390" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adrenergic alpha-2 Receptor Agonists ; Adrenergic alpha-2 Receptor Antagonists ; Adrenergic alpha-Agonists/pharmacology ; Adrenergic alpha-Antagonists/pharmacology ; Adult ; Aged ; Animals ; Animals, Congenic ; Blood Glucose/metabolism ; Cell Membrane/metabolism ; Cyclic AMP/metabolism ; Diabetes Mellitus, Type 2/*genetics/metabolism ; Exocytosis ; Genetic Association Studies ; Genetic Predisposition to Disease ; Humans ; Insulin/blood/*secretion ; Insulin-Secreting Cells/*secretion ; Middle Aged ; Polymorphism, Single Nucleotide ; RNA Interference ; Rats ; Rats, Inbred Strains ; Receptors, Adrenergic, alpha-2/*genetics/*metabolism ; Risk Factors ; Secretory Vesicles/metabolism ; Up-Regulation ; Young Adult
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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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  • 4
    Publication Date: 1981-12-04
    Description: When pregnant rats were fed a 50 percent galactose diet there was a striking reduction in oocyte number in the offspring. The most prominent effects were noted after exposure to galactose during the premeiotic stages of oogenesis. Prenatal exposure to galactose or its metabolites may contribute to the premature ovarian failure characteristic of human galactosemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Y T -- Mattison, D R -- Feigenbaum, L -- Fukui, H -- Schulman, J D -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1145-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302587" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dietary Carbohydrates/*physiology ; Female ; Fetus/drug effects/physiology ; Galactose/*pharmacology ; Maternal-Fetal Exchange ; Oocytes/drug effects/*physiology ; Ovum/*physiology ; Pregnancy ; Rats ; Rats, Inbred Strains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1982-07-02
    Description: Administration of synthetic ovine corticotropin-releasing factor led to rapid, parallel increases in adrenocorticotropin and alpha-melanocyte-stimulating hormone concentrations in rat plasma. Prior treatment with dexamethasone almost completely blocked the adrenocorticotropin response but not the increase in melanocyte-stimulating hormone. These data demonstrate that corticotropin-releasing factor is a potent stimulator not only of adrenocorticotropin secretion from the corticotrophs of the anterior pituitary gland but also of peptide secretion from the intermediate lobe. Such data suggest that melanocyte-stimulating hormone and beta-endorphin play a role in the physiological response to stress.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Proulx-Ferland, L -- Labrie, F -- Dumont, D -- Cote, J -- Coy, D H -- Sveiraf, J -- New York, N.Y. -- Science. 1982 Jul 2;217(4554):62-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6283632" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/blood ; Animals ; Castration ; Corticotropin-Releasing Hormone/*pharmacology ; Dexamethasone/pharmacology ; Female ; Melanocyte-Stimulating Hormones/blood/*secretion ; Pituitary Gland/drug effects/*secretion ; Pituitary Gland, Anterior/secretion ; 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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  • 6
    Publication Date: 1983-07-29
    Description: Insulin directly inhibits protein phosphorylation in isolated rat liver nuclear envelopes. In the present studies, an antiserum to insulin receptor as well as the plant lectins concanavalin A and phytohemagglutinin mimicked insulin action in isolated nuclear envelopes. These studies suggest that insulin and agents that mimic it may directly regulate nuclear functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Purrello, F -- Burnham, D B -- Goldfine, I D -- AM 06659/AM/NIADDK NIH HHS/ -- AM 26667/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 29;221(4609):462-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6346487" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Concanavalin A/pharmacology ; Female ; Immune Sera ; Insulin/*pharmacology ; Lectins/*pharmacology ; Nuclear Envelope/*drug effects/metabolism ; Phosphorylation ; Phytohemagglutinins/pharmacology ; Rats ; Rats, Inbred Strains ; Receptor, Insulin/*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: 1986-12-05
    Description: Ethanol, at pharmacologically relevant concentrations of 20 to 100 mM, stimulates gamma-aminobutyric (GABA) receptor-mediated uptake of 36Cl-labeled chlorine into isolated brain vesicles. One drug that acts at GABA-benzodiazepine receptors, the imidazobenzodiazepine Ro15-4513, has been found to be a potent antagonist of ethanol-stimulated 36Cl- uptake into brain vesicles, but it fails to antagonize either pentobarbital- or muscimol-stimulated 36Cl- uptake. Pretreatment of rats with Ro15-4513 blocks the anticonflict activity of low doses of ethanol (but not pentobarbital) as well as the behavioral intoxication observed with higher doses of ethanol. The effects of Ro15-4513 in antagonizing ethanol-stimulated 36Cl- uptake and behavior are completely blocked by benzodiazepine receptor antagonists. However, other benzodiazepine receptor inverse agonists fail to antagonize the actions of ethanol in vitro or in vivo, suggesting a novel interaction of Ro15-4513 with the GABA receptor-coupled chloride ion channel complex. The identification of a selective benzodiazepine antagonist of ethanol-stimulated 36Cl- uptake in vitro that blocks the anxiolytic and intoxicating actions of ethanol suggests that many of the neuropharmacologic actions of ethanol may be mediated via central GABA receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suzdak, P D -- Glowa, J R -- Crawley, J N -- Schwartz, R D -- Skolnick, P -- Paul, S M -- New York, N.Y. -- Science. 1986 Dec 5;234(4781):1243-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3022383" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anxiety/drug effects ; Azides/*pharmacology ; Benzodiazepines/*pharmacology ; Chlorides/metabolism ; Ethanol/*antagonists & inhibitors ; Flumazenil/pharmacology ; Male ; Pyrazoles/pharmacology ; Rats ; Rats, Inbred Strains ; Receptors, GABA-A/drug effects ; Synaptosomes/drug effects
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 1984-07-20
    Description: Adult rats with bilateral lesions of the caudate nucleus were treated with GM1 ganglioside. Although animals injected with a control solution were severely impaired in their ability to learn a complex spatial task, those treated with ganglioside were able to learn spatial reversals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sabel, B A -- Slavin, M D -- Stein, D G -- New York, N.Y. -- Science. 1984 Jul 20;225(4659):340-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6740316" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*drug effects ; Brain Injuries/*drug therapy/psychology ; Caudate Nucleus/drug effects/injuries ; G(M1) Ganglioside/pharmacology/*therapeutic use ; Gangliosides/*therapeutic use ; Humans ; Learning/drug effects ; Male ; 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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  • 9
    Publication Date: 1988-09-23
    Description: The imaging of phosphorescence provides a method for monitoring oxygen distribution within the vascular system of intact tissues. Isolated rat lives were perfused through the portal vein with media containing palladium coproporphyrin, which phosphoresced and was used to image the liver at various perfusion rates. Because oxygen is a powerful quenching agent for phosphors, the transition from well-perfused liver to anoxia (no flow of oxygen) resulted in large increases of phosphorescence. During stepwise restoration of oxygen flow, the phosphorescence images showed marked heterogeneous patterns of tissue reoxygenation, which indicated that there were regional inequalities in oxygen delivery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rumsey, W L -- Vanderkooi, J M -- Wilson, D F -- GM 21524/GM/NIGMS NIH HHS/ -- GM 36393/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1988 Sep 23;241(4873):1649-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, 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/3420417" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Coproporphyrins ; Liver Circulation ; *Luminescence ; Male ; Oxygen/*analysis ; Palladium ; Perfusion ; 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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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1988-08-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roof, D J -- Heth, C A -- EY05790/EY/NEI NIH HHS/ -- EY06514/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1988 Aug 12;241(4867):845-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Berman-Gund Laboratory, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston 02114.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3136548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Darkness ; GTP-Binding Proteins/*biosynthesis ; Light ; Membrane Proteins/*biosynthesis/isolation & purification ; Photoreceptor Cells/*metabolism ; Rats ; Rats, Inbred Strains ; Rod Cell Outer Segment/*metabolism/radiation effects ; Species Specificity ; Transducin
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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