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  • Rats  (8)
  • American Association for the Advancement of Science (AAAS)  (8)
  • Oxford University Press
  • American Geophysical Union (AGU)
  • 1990-1994  (8)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (8)
  • Oxford University Press
  • American Geophysical Union (AGU)
Years
Year
  • 1
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    Identification of the DNA binding site for NGFI-B by genetic selection in yeast (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-05-31
    Description: An in vivo selection system for isolating targets of DNA binding proteins in yeast was developed and used to identify the DNA binding site for the NGFI-B protein, a member of the steroid-thyroid hormone receptor superfamily. The feasibility of the technique was verified by selecting DNA fragments that contained binding sites for GCN4, a well-characterized yeast transcriptional activator. The DNA binding domain of NGFI-B, expressed as part of a LexA-NGFI-B-GAL4 chimeric activator, was then used to isolate a rat genomic DNA fragment that contained an NGFI-B binding site. The NGFI-B response element (NBRE) is similar to but functionally distinct from elements recognized by the estrogen and thyroid hormone receptors and the hormone receptor-like proteins COUP-TF, CF1, and H-2RIIBP. Cotransfection experiments in mammalian cells demonstrated that NGFI-B can activate transcription from the NBRE with or without its putative ligand binding domain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, T E -- Fahrner, T J -- Johnston, M -- Milbrandt, J -- NS01018/NS/NINDS NIH HHS/ -- P01 CA49712/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1991 May 31;252(5010):1296-300.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1925541" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Proteins/metabolism ; Base Sequence ; Binding Sites ; Cloning, Molecular ; DNA, Fungal/*metabolism ; DNA-Binding Proteins/genetics/*metabolism/pharmacology ; Fungal Proteins/metabolism ; Molecular Sequence Data ; Nuclear Receptor Subfamily 4, Group A, Member 1 ; Plasmids ; *Protein Kinases ; Rats ; Receptors, Cytoplasmic and Nuclear ; Receptors, Steroid ; Repressor Proteins ; Saccharomyces cerevisiae/*genetics ; *Saccharomyces cerevisiae Proteins ; *Serine Endopeptidases ; Transcription Factors/genetics/*metabolism/pharmacology ; Transcription, Genetic ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Stress-induced facilitation of classical conditioning (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-24
    Description: Stress has been shown to impair subsequent learning. To determine whether stress would impair classical conditioning, rats were exposed to inescapable, low-intensity tail shock and subsequently classically conditioned under freely moving conditions with a brief periorbital shock unconditioned stimulus and a white noise conditioned stimulus. Unexpectedly stressed rats exhibited significantly more conditioned eyeblink responses and the magnitude of their individual responses was also enhanced. These results stand in contrast to the learning deficits typically observed and suggest that stress can enhance the acquisition of discrete conditioned responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shors, T J -- Weiss, C -- Thompson, R F -- AG00093/AG/NIA NIH HHS/ -- AG05500/AG/NIA NIH HHS/ -- AG05514/AG/NIA NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1992 Jul 24;257(5069):537-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Princeton University, NJ 08544.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1636089" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Blinking ; Conditioning, Classical/*physiology ; Corticosterone/blood ; Electromyography ; Electroshock ; Learning/physiology ; Male ; Rats ; Rats, Inbred F344 ; Stress, Psychological/*physiopathology
    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
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    Calcium as a coagonist of inositol 1,4,5-trisphosphate-induced calcium release (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-19
    Description: Inositol 1,4,5-trisphosphate (IP3)-induced calcium release from intracellular stores is a regulator of cytosolic-free calcium levels. The subsecond kinetics and regulation of IP3-induced calcium-45 release from synaptosome-derived microsomal vesicles were resolved by rapid superfusion. Extravesicular calcium acted as a coagonist, potentiating the transient IP3-induced release of calcium-45. Thus, rapid elevation of cytosolic calcium levels may trigger IP3-induced calcium release in vivo. Extravesicular calcium also produced a more slowly developing, reversible inhibition of IP3-induced calcium-45 release. Sequential positive and negative feedback regulation by calcium of IP3-induced calcium release may contribute to transients and oscillations of cytosolic-free calcium in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finch, E A -- Turner, T J -- Goldin, S M -- GM35423/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Apr 19;252(5004):443-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2017683" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/pharmacology ; Animals ; Brain/ultrastructure ; Calcimycin/pharmacology ; Calcium/*metabolism/pharmacology ; Calcium Radioisotopes ; Cytosol/metabolism ; Drug Synergism ; Heparin/pharmacology ; Inositol 1,4,5-Trisphosphate/*pharmacology ; Kinetics ; Magnesium/pharmacology ; Microsomes/drug effects/metabolism ; Rats ; Synaptosomes/ultrastructure
    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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    Identification of calcium channels that control neurosecretion (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-11-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dunlap, K -- Luebke, J I -- Turner, T J -- New York, N.Y. -- Science. 1994 Nov 4;266(5186):828-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973643" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/metabolism ; Calcium Channel Blockers/*pharmacology ; Calcium Channels/drug effects/*physiology ; Hippocampus/drug effects/*physiology ; In Vitro Techniques ; *Neurosecretion/drug effects ; Peptides/pharmacology ; Rats ; Spider Venoms/pharmacology ; Synaptic Transmission/drug effects/*physiology ; omega-Agatoxin IVA ; *omega-Conotoxins
    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
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    Reciprocal regulation of adipogenesis by Myc and C/EBP alpha (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-04-17
    Description: 3T3-L1 adipoblasts that express large amounts of c-Myc cannot terminally differentiate, raising the possibility that Myc inhibits the expression of genes that promote adipogenesis. The CCAAT/enhancer binding protein (C/EBP alpha) is induced during 3T3-L1 adipogenesis when cells commit to the differentiation pathway. Transfection of 3T3-L1 adipoblasts with the gene that encodes C/EBP alpha caused overt expression of the adipocyte morphology. Expression of Myc prohibited the normal induction of C/EBP alpha and prevented adipogenesis. Enforced expression of C/EBP alpha overcame the Myc-induced block to differentiation. These results provide a molecular basis for the regulation of adipogenesis and implicate Myc and C/EBP alpha as pivotal controlling elements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freytag, S O -- Geddes, T J -- CA51748/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1992 Apr 17;256(5055):379-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biology Research Program, Henry Ford Hospital, Detroit, MI 48202.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1566086" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/*cytology/metabolism ; Animals ; Base Sequence ; CCAAT-Enhancer-Binding Proteins ; Cell Differentiation ; Cell Division ; Cell Line ; DNA-Binding Proteins/genetics/*physiology ; *Gene Expression Regulation ; Molecular Sequence Data ; Nuclear Proteins/genetics/*physiology ; Plasmids ; Polymerase Chain Reaction ; Proto-Oncogene Proteins c-myc/genetics/*physiology ; RNA, Messenger/analysis ; Rats ; Transfection
    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
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    Calcium channels coupled to glutamate release identified by omega-Aga-IVA (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-10-09
    Description: Presynaptic calcium channels are crucial elements of neuronal excitation-secretion coupling. In mammalian brain, they have been difficult to characterize because most presynaptic terminals are too small to probe with electrodes, and available pharmacological tools such as dihydropyridines and omega-conotoxin are largely ineffective. Subsecond measurements of synaptosomal glutamate release have now been used to assess presynaptic calcium channel activity in order to study the action of peptide toxins from the venom of the funnel web spider Agelenopsis aperta, which is known to inhibit dihydropyridine and omega-conotoxin-resistant neuronal calcium currents. A presynaptic calcium channel important in glutamate release is shown to be omega-Aga-IVA sensitive and omega-conotoxin resistant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Turner, T J -- Adams, M E -- Dunlap, K -- New York, N.Y. -- Science. 1992 Oct 9;258(5080):310-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, Tufts University School of Medicine, Boston, MA 02111.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1357749" target="_blank"〉PubMed〈/a〉
    Keywords: Agatoxins ; Animals ; Batrachotoxins/pharmacology ; Brain/physiology/ultrastructure ; Calcium/pharmacology ; Calcium Channels/*physiology ; Egtazic Acid/pharmacology ; Frontal Lobe/ultrastructure ; Glutamates/*secretion ; Glutamic Acid ; Kinetics ; Mollusk Venoms/pharmacology ; Potassium Chloride/pharmacology ; Rats ; Spider Venoms/*pharmacology ; Synaptosomes/physiology ; omega-Agatoxin IVA ; omega-Conotoxin GVIA
    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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  • 7
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    HIV-1 coat protein neurotoxicity prevented by calcium channel antagonists (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-04-20
    Description: Coat protein gp120 from the human immunodeficiency virus type-1 (HIV-1) increased intracellular free calcium and injured rodent retinal ganglion cells and hippocampal neurons in culture. Highly purified recombinant gp120 envelope protein produced these effects in a dose-dependent fashion at picomolar concentrations. Immunoprecipitation with antibody to gp120, but not with control immunoglobulin-containing serum, depleted solutions of the viral envelope protein and also prevented both the rise in intracellular calcium and neuronal toxicity. The gp120-induced increase in intracellular calcium was abrogated by transiently lowering extracellular calcium or by adding the dihydropyridine calcium channel antagonist nimodipine (100 nM). Calcium channel antagonists also prevented gp120-induced neuronal injury. In addition, intracellular stores appeared to contribute substantially to the increase in calcium elicited by gp120. Since increases in intracellular calcium have been associated with neurotoxicity, it is possible that an injurious effect of gp120 on neurons might be related to this mechanism and that treatment with calcium channel antagonists may prove useful in mitigating HIV-1-related neuronal injury.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dreyer, E B -- Kaiser, P K -- Offermann, J T -- Lipton, S A -- EY 05477/EY/NEI NIH HHS/ -- NS 01395/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1990 Apr 20;248(4953):364-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology, Children's Hospital, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2326646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*metabolism ; Calcium Channel Blockers/*pharmacology ; Cells, Cultured ; HIV Envelope Protein gp120/administration & dosage/antagonists & ; inhibitors/*physiology ; HIV-1/*analysis ; Hippocampus/cytology ; Neurons/*drug effects/metabolism ; Nimodipine/pharmacology ; Rats ; Recombinant Proteins/pharmacology ; Retinal Ganglion Cells/drug effects/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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  • 8
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    Common forms of synaptic plasticity in the hippocampus and neocortex in vitro (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-06-04
    Description: Activity-dependent synaptic plasticity in the superficial layers of juvenile cat and adult rat visual neocortex was compared with that in adult rat hippocampal field CA1. Stimulation of neocortical layer IV reliably induced synaptic long-term potentiation (LTP) and long-term depression (LTD) in layer III with precisely the same types of stimulation protocols that were effective in CA1. Neocortical LTP and LTD were specific to the conditioned pathway and, as in the hippocampus, were dependent on activation of N-methyl-D-aspartate receptors. These results provide strong support for the view that common principles may govern experience-dependent synaptic plasticity in CA1 and throughout the superficial layers of the mammalian neocortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirkwood, A -- Dudek, S M -- Gold, J T -- Aizenman, C D -- Bear, M F -- New York, N.Y. -- Science. 1993 Jun 4;260(5113):1518-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Brown University, Providence, RI 02912.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8502997" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Aging/physiology ; Animals ; Cats ; Cerebral Cortex/*physiology ; Electric Stimulation ; Hippocampus/*physiology ; In Vitro Techniques ; Neural Pathways/physiology ; Neuronal Plasticity/*physiology ; Rats ; Receptors, N-Methyl-D-Aspartate/physiology ; Synapses/*physiology
    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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