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  • Rats  (84)
  • Cells, Cultured  (27)
  • Adult  (25)
  • American Association for the Advancement of Science (AAAS)  (131)
  • American Geophysical Union (AGU)
  • 2015-2019
  • 1985-1989  (131)
  • 1945-1949
  • 1986  (131)
Collection
Keywords
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  • American Association for the Advancement of Science (AAAS)  (131)
  • American Geophysical Union (AGU)
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  • 2015-2019
  • 1985-1989  (131)
  • 1945-1949
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  • 1
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    Nerve growth factor gene expression in the developing rat brain (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-17
    Description: The regulation of nerve growth factor (NGF) protein and NGF messenger RNA (mRNA) in the developing rat brain has been studied to assess the hypothesis that NGF supports the differentiation of cholinergic neurons in the basal forebrain. In the adult, the major targets of these neurons, the hippocampus and neocortex, contain the highest concentrations of NGF mRNA, but comparatively low ratios of NGF protein to its mRNA. In contrast, a high concentration of NGF protein and a low concentration of NGF mRNA were seen in the basal forebrain, consistent with retrograde transport of NGF protein into this region from the neocortex and hippocampus. In these two target regions NGF and NGF mRNA were barely detectable at birth, their concentrations increased to a peak at day 21, and then NGF mRNA, but not NGF protein, declined threefold by day 35. NGF accumulation in the basal forebrain paralleled that in the target regions and preceded an increase in choline acetyltransferase, suggesting that the differentiation of cholinergic projection neurons is indeed regulated by retrogradely transported NGF. In addition, high ratios of NGF protein to NGF mRNA, comparable to that in the basal forebrain, were seen in the olfactory bulb and cerebellum, suggesting that NGF may be transported into these regions by unidentified neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Large, T H -- Bodary, S C -- Clegg, D O -- Weskamp, G -- Otten, U -- Reichardt, L F -- NS21824/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Oct 17;234(4774):352-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3764415" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*growth & development/metabolism ; Brain Chemistry ; Cerebellum/analysis ; Cerebral Cortex/analysis ; Hippocampus/analysis ; Nerve Growth Factors/analysis/*biosynthesis/genetics ; RNA, Messenger/analysis ; 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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  • 2
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    Gonadotroph-specific expression of metallothionein fusion genes in pituitaries of transgenic mice (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-28
    Description: Transgenic mice expressing a metallothionein-somatostatin fusion gene contain high concentrations of somatostatin in the anterior pituitary gland, a tissue that does not normally produce somatostatin. Immunoreactive somatostatin within the anterior pituitaries was found exclusively within gonadotrophs. Similarly, a metallothionein-human growth-hormone fusion gene was also expressed selectively in gonadotrophs. It is proposed that sequences common to the two fusion genes are responsible for the gonadotroph-specific expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Low, M J -- Lechan, R M -- Hammer, R E -- Brinster, R L -- Habener, J F -- Mandel, G -- Goodman, R H -- AM 01313/AM/NIADDK NIH HHS/ -- AM 30457/AM/NIADDK NIH HHS/ -- AM 31400/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Feb 28;231(4741):1002-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2868526" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Recombinant/metabolism ; Genes ; Genetic Engineering ; Humans ; Immunoenzyme Techniques ; Luteinizing Hormone/metabolism ; Metallothionein/*genetics ; Mice ; Pituitary Gland, Anterior/*metabolism ; Rats ; Somatostatin/*genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Associative induction of posttetanic and long-term potentiation in CA1 neurons of rat hippocampus (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-23
    Description: Electrical stimulation of fibers in the stratum radiatum causes an excitatory postsynaptic potential in CA1 neurons of the hippocampus. Other excitatory inputs to or direct depolarization of these CA1 neurons during stimulation of the stratum radiatum caused a subsequent increase in the excitatory postsynaptic potential. This enhancement was characterized as a brief potentiation (2 to 3 minutes, similar to posttetanic potentiation) and a long-term potentiation (presumed to be involved in learning and memory). These potentiations are probably induced by an interaction of the postsynaptic cell or other presynaptic terminals with the test presynaptic terminals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sastry, B R -- Goh, J W -- Auyeung, A -- New York, N.Y. -- Science. 1986 May 23;232(4753):988-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3010459" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Brain Mapping ; Calcium/physiology ; Conditioning (Psychology)/physiology ; Electric Stimulation ; Hippocampus/*physiology ; In Vitro Techniques ; Learning/physiology ; Membrane Potentials ; Rats ; Synapses/physiology ; Synaptic Transmission
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Studies on environmental chemical carcinogenesis in Japan (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-18
    Description: The historical background of studies in Japan on chemical carcinogenesis from environmental sources is described from personal experience.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sugimura, T -- New York, N.Y. -- Science. 1986 Jul 18;233(4761):312-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3088728" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Nitroquinoline-1-oxide/analysis ; Animals ; Biotransformation ; Carcinogens/*analysis ; Cyanobacteria/analysis ; Environmental Pollution/*analysis ; Food Additives ; Food Handling ; Furylfuramide/toxicity ; Health Policy ; Humans ; Indoles/metabolism ; Japan ; Lyngbya Toxins/toxicity ; Methods ; Methylnitronitrosoguanidine/toxicity ; Mutagenicity Tests ; Oncogenes ; Primary Prevention ; Rats ; Risk ; Stereoisomerism ; Stomach Neoplasms/chemically induced ; Streptomyces/analysis ; Structure-Activity Relationship ; Urinary Bladder Neoplasms/chemically induced
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Calcium and sodium channels in spontaneously contracting vascular muscle cells (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-25
    Description: Electrophysiological recordings of inward currents from whole cells showed that vascular muscle cells have one type of sodium channel and two types of calcium channels. One of the calcium channels, the transient calcium channel, was activated by small depolarizations but then rapidly inactivated. It was equally permeable to calcium and barium and was blocked by cadmium, but not by tetrodotoxin. The other type, the sustained calcium channel, was activated by larger depolarizations, but inactivated very little; it was more permeable to barium than calcium. The sustained calcium channel was more sensitive to block by cadmium than the transient channel, but also was not blocked by tetrodotoxin. The sodium channel inactivated 15 times more rapidly than the transient calcium channel and at more negative voltages. This sodium channel, which is unusual because it is only blocked by a very high (60 microM) tetrodotoxin concentration but not by cadmium, is the first to be characterized in vascular muscle, and together with the two calcium channels, provides a basis for different patterns of excitation in vascular muscles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sturek, M -- Hermsmeyer, K -- HL 16328/HL/NHLBI NIH HHS/ -- HL 32295/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1986 Jul 25;233(4762):475-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2425434" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*physiology ; Ion Channels/*physiology ; Membrane Potentials ; *Muscle Contraction ; Muscle, Smooth, Vascular/*physiology ; Rats ; Rats, Inbred WKY ; Sodium/*physiology
    Print ISSN: 0036-8075
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  • 6
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    Coronavirus infection induces H-2 antigen expression on oligodendrocytes and astrocytes (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-23
    Description: Infection of the central nervous system by mouse hepatitis virus strain A59, a murine neurotropic coronavirus, induces class I major histocompatibility complex antigens on mouse oligodendrocytes and astrocytes, cells that do not normally express these antigens on their surfaces. This induction, which occurs through soluble factors elaborated by infected glial cells, potentially allows immunocytes to interact with the glial cells and may play a critical role in the pathogenesis of virus-induced, immune-mediated demyelination in the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suzumura, A -- Lavi, E -- Weiss, S R -- Silberberg, D H -- NS11037/NS/NINDS NIH HHS/ -- NS21954/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 May 23;232(4753):991-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3010460" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/*immunology ; Cells, Cultured ; Fluorescent Antibody Technique ; H-2 Antigens/*immunology ; Hepatitis, Viral, Animal/*immunology ; Macrophages/immunology ; Mice ; Murine hepatitis virus/immunology ; Neuroglia/*immunology ; Oligodendroglia/*immunology
    Print ISSN: 0036-8075
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  • 7
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    Optical image quality and the cone mosaic (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-31
    Description: Contrary to the orthodox view that optical image quality should "match" the photoreceptor grain, anatomical data from the eyes of various animals suggest that the image quality is significantly superior to the potential resolution of the cone mosaic in most retinal regions. A new theory is presented to explain the existence of this relation and to better appreciate eye design. It predicts that photoreceptors are potentially visible through the natural optics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snyder, A W -- Bossomaier, T R -- Hughes, A -- New York, N.Y. -- Science. 1986 Jan 31;231(4737):499-501.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3941914" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Humans ; Models, Neurological ; Photoreceptor Cells/*anatomy & histology ; Rats ; Snakes ; Species Specificity ; *Vision, Ocular ; *Visual Perception
    Print ISSN: 0036-8075
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  • 8
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    Adult decisions (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Soloway, A H -- New York, N.Y. -- Science. 1986 Jan 31;231(4737):442.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3941905" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Child ; Drug Therapy/*standards ; *Government Agencies ; Humans ; *Patient Participation ; Social Responsibility ; United States
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Suprachiasmatic nucleus vasopressin messenger RNA: circadian variation in normal and Brattleboro rats (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-04-18
    Description: In situ hybridization of an oligonucleotide probe complementary to vasopressin messenger RNA (mRNA) in sections from normal or Brattleboro rat hypothalami revealed hybridization densities in each of three vasopressin-rich nuclei: the supraoptic, paraventricular, and suprachiasmatic. When entrained to a daily light-dark cycle, each rat strain displayed diurnal variation in hybridizable mRNA in the suprachiasmatic, but not in the supraoptic or paraventricular nuclei. The higher values for suprachiasmatic mRNA in the morning correlate well with previously elucidated morning increases in vasopressin immunoreactivity in the cerebrospinal fluid. These results support the utility of in situ hybridization techniques for elucidating physiological influences on regional peptidergic function, are consistent with a prominent role for vasopressinergic suprachiasmatic neurons in generating the cerebrospinal fluid vasopressin rhythm, and suggest that regulation of this mRNA rhythm is not dependent on release of intact peptide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Uhl, G R -- Reppert, S M -- New York, N.Y. -- Science. 1986 Apr 18;232(4748):390-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3961487" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoradiography ; *Circadian Rhythm ; Nucleic Acid Hybridization ; Paraventricular Hypothalamic Nucleus/analysis/physiology ; RNA, Messenger/*analysis/isolation & purification ; Rats ; Rats, Brattleboro ; Rats, Inbred Strains ; Suprachiasmatic Nucleus/*analysis/physiology ; Supraoptic Nucleus/analysis/physiology ; Vasopressins/genetics/*physiology
    Print ISSN: 0036-8075
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  • 10
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    Oligodendrocyte adhesion activates protein kinase C-mediated phosphorylation of myelin basic protein (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-12-12
    Description: When isolated adult oligodendrocytes adhere to a substratum myelinogenesis occurs. Investigation of the mechanism by which this happens indicated that the oligodendrocyte-substratum interaction activated protein kinase C-dependent phosphorylation of myelin basic protein and promoted the synthesis of myelin basic protein. In addition, when agents that activate protein kinase C (second messenger diacylglycerol or a tumor-promoting phorbol ester) were added to nonattached oligodendrocytes, they mimicked the influence of the substratum by inducing phosphorylation of myelin basic protein; and reagents that increase cellular adenosine 3', 5'-monophosphate (cyclic AMP) inhibited phosphorylation of myelin basic protein. Thus, at least in vitro, the interaction between oligodendrocytes and the substratum may mediate myelinogenic events, and phosphorylation of myelin basic protein may be an early requirement in the sequence of steps that ultimately results in myelin formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vartanian, T -- Szuchet, S -- Dawson, G -- Campagnoni, A T -- GM-07183/GM/NIGMS NIH HHS/ -- HD-04583/HD/NICHD NIH HHS/ -- HD-06426/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Dec 12;234(4782):1395-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2431483" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-3-isobutylxanthine/pharmacology ; Adult ; Calcimycin/pharmacology ; Cell Adhesion ; Colforsin/pharmacology ; Cyclic AMP/metabolism ; Enzyme Activation ; Humans ; Myelin Basic Protein/*metabolism ; Neuroglia/*cytology ; Oligodendroglia/*cytology ; Phosphorylation ; Protein Kinase C/*metabolism ; Tetradecanoylphorbol Acetate/pharmacology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 11
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    Fertility in the United States (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-31
    Description: From the postwar high of 3.8 births per woman at the peak of the baby boom, the total fertility rate in the United States has fallen to 1.8, where it has remained unchanged for nearly a decade. This below-replacement level of fertility has, in recent decades, characterized most Western countries, some of which have shown declines to well below 1.5 births per woman. Were it not for the continued infusion of immigrants, the U.S. population, which already shows the aging characteristic of low fertility, would stop growing and begin to decline before the middle of the next century. The low fertility in the United States has been accomplished by a postponement of marriage and by the widespread use of contraception, with heavy reliance on surgical sterilization as a contraceptive method. Judging from the experience of other Western countries and from our own historical experience of two centuries of fertility decline interrupted only by the baby boom, as well as from the absence of social trends that would counteract those contributing to that decline, the prognosis is for a continued low level of fertility in the United States.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Westoff, C F -- New York, N.Y. -- Science. 1986 Oct 31;234(4776):554-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3532324" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; *Birth Rate ; Contraception/history ; Ethnic Groups ; Female ; Fertility ; Forecasting ; History, 20th Century ; Humans ; Population Dynamics ; Population Growth ; Pregnancy ; Pregnancy in Adolescence ; United States
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  • 12
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    Oxytocin secretion in response to cholecystokinin and food: differentiation of nausea from satiety (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-13
    Description: Administration of cholecystokinin (CCK) to rats caused a dose-dependent increase in plasma levels of the neurohypophyseal hormone oxytocin (OT). The OT secretion was comparable to that found in response to nausea-producing chemical agents that cause learned taste aversions. The effect of CCK on OT secretion was blunted after gastric vagotomy, as was the inhibition of food intake induced by CCK. Food ingestion also led to elevated plasma OT in rats, but CCK and aversive agents caused even greater OT stimulation. Thus, after administration of large doses of CCK, vagally mediated activation of central nausea pathways seems to be predominantly responsible for the subsequent decrease in food intake. Despite their dissimilar affective states, both nausea and satiety may activate a common hypothalamic oxytocinergic pathway that controls the inhibition of ingestion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Verbalis, J G -- McCann, M J -- McHale, C M -- Stricker, E M -- AM-16166/AM/NIADDK NIH HHS/ -- MH-25140/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1986 Jun 13;232(4756):1417-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3715453" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning/physiology ; Cholecystokinin/*pharmacology ; Feeding Behavior/*physiology ; Nausea/*physiopathology ; Oxytocin/*secretion ; Paraventricular Hypothalamic Nucleus/physiology ; Rats ; Satiation/*physiology ; Vagotomy
    Print ISSN: 0036-8075
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  • 13
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    Activation of mouse T-helper cells induces abundant preproenkephalin mRNA synthesis (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-09
    Description: Antigenic or mitogenic stimulation of T cells induces the secretion of an array of protein hormones that regulate immune responses. Molecular cloning has contributed strongly to our present understanding of the nature of this regulation. A complementary DNA (cDNA) library prepared from a cloned concanavalin A-activated mouse T-helper cell line was screened for abundant and induction-specific cDNA's. One such randomly chosen cDNA was found to encode mouse preproenkephalin messenger RNA (mRNA). Preproenkephalin mRNA represented about 0.4 percent of the mRNA in the activated cell line but was absent in resting cells of this line. Other induced T-helper cell lines have 0.1 to 0.5 percent of their mRNA as preproenkephalin mRNA. Induced T-helper cell culture supernatants have [Met]enkephalin-immunoreactive material. The production by activated T cells of a peptide neurotransmitter identifies a signal that can potentially permit T cells to modulate the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zurawski, G -- Benedik, M -- Kamb, B J -- Abrams, J S -- Zurawski, S M -- Lee, F D -- New York, N.Y. -- Science. 1986 May 9;232(4751):772-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2938259" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cattle ; Cell Line ; Cloning, Molecular ; DNA/genetics ; Enkephalins/*biosynthesis/genetics ; Humans ; *Lymphocyte Activation ; Mice ; Protein Precursors/*biosynthesis/genetics ; RNA, Messenger/*biosynthesis ; Rats ; T-Lymphocytes, Helper-Inducer/drug effects/metabolism/*physiology
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  • 14
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    Chromosome Y-specific DNA is transferred to the short arm of X chromosome in human XX males (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-15
    Description: Y-chromosomal DNA is present in the genomes of most human XX males. In these cases, maleness is probably due to the presence of the Y-encoded testis-determining factor (TDF). By means of in situ hybridization of a probe (pDP105) detecting Y-specific DNA to metaphases from three XX males, it was demonstrated that the Y DNA is located on the tip of the short arm of an X chromosome. This finding supports the hypothesis that XX maleness is frequently the result of transfer of Y DNA, including TDF, to a paternally derived X chromosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Andersson, M -- Page, D C -- de la Chapelle, A -- New York, N.Y. -- Science. 1986 Aug 15;233(4765):786-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3738510" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Chromosome Mapping ; DNA/*genetics ; Humans ; Lymphocyte Activation ; Lymphocytes/cytology ; Male ; Metaphase ; Nucleic Acid Hybridization ; *Sex Chromosome Aberrations ; Sex Determination Analysis ; *X Chromosome ; *Y Chromosome
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  • 15
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    Induction of membrane ruffling and fluid-phase pinocytosis in quiescent fibroblasts by ras proteins (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-05
    Description: Expression of the ras oncogene is thought to be one of the contributing events in the initiation of certain types of human cancer. To determine the cellular activities that are directly triggered by ras proteins, the early consequences of microinjection of the human H-ras proteins into quiescent rat embryo fibroblasts were investigated. Within 30 minutes to 1 hour after injection, cells show a marked increase in surface ruffles and fluid-phase pinocytosis. The rapid enhancement of membrane ruffling and pinocytosis is induced by both the proto-oncogenic and the oncogenic forms of the H-ras protein. The effects produced by the oncogenic protein persist for more than 15 hours after injection, whereas the effects of the proto-oncogenic protein are short-lived, being restricted to a 3-hour interval after injection. The stimulatory effect of the ras oncogene protein on ruffling and pinocytosis is dependent on the amount of injected protein and is accompanied by an apparent stimulation of phospholipase A2 activity. These rapid changes in cell membrane activities induced by ras proteins may represent primary events in the mechanism of action of ras proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bar-Sagi, D -- Feramisco, J R -- CA07896/CA/NCI NIH HHS/ -- CA39811/CA/NCI NIH HHS/ -- GM28277/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Sep 5;233(4768):1061-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3090687" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle/drug effects ; Cell Membrane/*drug effects/ultrastructure ; Cells, Cultured ; Culture Media ; DNA/biosynthesis ; GTP-Binding Proteins/*pharmacology ; Humans ; Microinjections ; Oncogene Proteins, Viral/*pharmacology ; Phospholipases A/metabolism ; Phospholipases A2 ; Phospholipids/metabolism ; Pinocytosis/*drug effects ; Rats ; Time Factors
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  • 16
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    Neurosciences advance in basic and clinical realms (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-12-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, D M -- New York, N.Y. -- Science. 1986 Dec 12;234(4782):1324-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2431480" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*diagnosis/pathology ; Animals ; Brain/pathology ; Cells, Cultured ; Glutamates/pharmacology ; Glutamic Acid ; Humans ; Ion Channels/*physiology ; Mollusca ; Neurons/drug effects ; Neurotransmitter Agents/*physiology ; Time Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Brain architecture: beyond genes (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, D M -- New York, N.Y. -- Science. 1986 Jul 11;233(4760):155-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3726526" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*anatomy & histology/growth & development ; Chickens ; Genes ; Humans ; Language Development ; Male ; Neurons/physiology ; Rats ; Synapses/physiology ; Visual Cortex/anatomy & histology/physiology
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  • 18
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    Immunoregulatory feedback between interleukin-1 and glucocorticoid hormones (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-08
    Description: The production and action of immunoregulatory cytokines, including interleukin-1 (IL-1), are inhibited by glucocorticoid hormones in vivo and in vitro. Conversely, glucocorticoid blood levels were increased by factors released by human leukocytes exposed to Newcastle disease virus preparations. This activity was neutralized by an antibody to IL-1. Therefore the capacity of IL-1 to stimulate the pituitary-adrenal axis was tested. Administration of subpyrogenic doses of homogeneous human monocyte-derived IL-1 or the pI 7 form of human recombinant IL-1 to mice and rats increased blood levels of adrenocorticotropic hormone (ACTH) and glucocorticoids. Another monokine, tumor necrosis factor, and the lymphokines IL-2 and gamma-interferon had no such effects when administered in doses equivalent to or higher than those of IL-1. The stimulatory effect of IL-1 on the pituitary-adrenal axis seemed not to be mediated by the secondary release of products from mature T lymphocytes since IL-1 was endocrinologically active when injected into athymic nude mice. These results strongly support the existence of an immunoregulatory feedback circuit in which IL-1 acts as an afferent and glucocorticoid as an efferent hormonal signal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Besedovsky, H -- del Rey, A -- Sorkin, E -- Dinarello, C A -- AI15614/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1986 Aug 8;233(4764):652-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3014662" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/blood/physiology ; Animals ; Corticosterone/blood/physiology ; Female ; Glucocorticoids/blood/immunology/*physiology ; Humans ; Interleukin-1/immunology/pharmacology/*physiology ; Leukocytes/drug effects/physiology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C3H ; Mice, Nude ; Newcastle disease virus/immunology ; 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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  • 19
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    Aminoguanidine prevents diabetes-induced arterial wall protein cross-linking (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-27
    Description: Age-associated increases in collagen cross-linking and accumulation of advanced glycosylation products are both accelerated by diabetes, suggesting that glucose-derived cross-link formation may contribute to the development of chronic diabetic complications as well as certain physical changes of aging. Aminoguanidine, a nucleophilic hydrazine compound, prevented both the formation of fluorescent advanced nonenzymatic glycosylation products and the formation of glucose-derived collagen cross-links in vitro. Aminoguanidine administration to rats was equally effective in preventing diabetes-induced formation of fluorescent advanced nonenzymatic glycosylation products and cross-linking of arterial wall connective tissue protein in vivo. The identification of aminoguanidine as an inhibitor of advanced nonenzymatic glycosylation product formation now makes possible precise experimental definition of the pathogenetic significance of this process and suggests a potential clinical role for aminoguanidine in the future treatment of chronic diabetic complications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brownlee, M -- Vlassara, H -- Kooney, A -- Ulrich, P -- Cerami, A -- AM 19655/AM/NIADDK NIH HHS/ -- R01-AM 33861/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 Jun 27;232(4758):1629-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3487117" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arteries/*drug effects/metabolism ; Collagen/metabolism ; Connective Tissue/drug effects/metabolism ; Diabetes Mellitus, Experimental/*drug therapy/metabolism ; Glucose/metabolism ; Guanidines/*pharmacology/therapeutic use ; Male ; Rats ; Rats, Inbred Lew ; Serum Albumin, Bovine/metabolism
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  • 20
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    Atrial natriuretic peptide elevation in congestive heart failure in the human (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-03-07
    Description: A sensitive radioimmunoassay for atrial natriuretic peptide was used to examine the relation between circulating atrial natriuretic peptide and cardiac filling pressure in normal human subjects, in patients with cardiovascular disease and normal cardiac filling pressure, and in patients with cardiovascular disease and elevated cardiac filling pressure with and without congestive heart failure. The present studies establish a normal range for atrial natriuretic peptide in normal human subjects. These studies also establish that elevated cardiac filling pressure is associated with increased circulating concentrations of atrial natriuretic peptide and that congestive heart failure is not characterized by a deficiency in atrial natriuretic peptide, but with its elevation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burnett, J C Jr -- Kao, P C -- Hu, D C -- Heser, D W -- Heublein, D -- Granger, J P -- Opgenorth, T J -- Reeder, G S -- New York, N.Y. -- Science. 1986 Mar 7;231(4742):1145-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2935937" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Atrial Natriuretic Factor/*blood ; Cardiovascular Diseases/blood ; Female ; Heart Failure/*blood ; Hemodynamics ; Humans ; Male ; Middle Aged ; Radioimmunoassay
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  • 21
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    Gene transfer and molecular cloning of the human NGF receptor (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-04-25
    Description: Nerve growth factor (NGF) and its receptor are important in the development of cells derived from the neural crest. Mouse L cell transformants have been generated that stably express the human NGF receptor gene transfer with total human DNA. Affinity cross-linking, metabolic labeling and immunoprecipitation, and equilibrium binding with 125I-labeled NGF revealed that this NGF receptor had the same size and binding characteristics as the receptor from human melanoma cells and rat PC12 cells. The sequences encoding the NGF receptor were molecularly cloned using the human Alu repetitive sequence as a probe. A cosmid clone that contained the human NGF receptor gene allowed efficient transfection and expression of the receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chao, M V -- Bothwell, M A -- Ross, A H -- Koprowski, H -- Lanahan, A A -- Buck, C R -- Sehgal, A -- NS-17551/NS/NINDS NIH HHS/ -- NS-23343-01/NS/NINDS NIH HHS/ -- NS21072/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Apr 25;232(4749):518-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3008331" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Neoplastic/drug effects ; *Cloning, Molecular ; DNA, Recombinant ; Genes ; Humans ; Melanoma/metabolism ; Mice ; Oncogenes ; Rats ; Receptors, Cell Surface/*genetics ; Receptors, Nerve Growth Factor ; Repetitive Sequences, Nucleic Acid ; Tunicamycin/pharmacology
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  • 22
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    Induction of the c-fos oncogene by thyrotropic hormone in rat thyroid cells in culture (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-25
    Description: Rat thyroid cells in culture, rendered quiescent by hormone deprivation, can be stimulated to undergo DNA synthesis in the absence of serum by the addition of purified thyrotropin. The primary effect in response to thyrotropin action in thyroid cells is the induction of the c-fos oncogene, followed by c-myc expression. This suggests that thyrotropin acts as a competence growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Colletta, G -- Cirafici, A M -- Vecchio, G -- New York, N.Y. -- Science. 1986 Jul 25;233(4762):458-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3726540" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cell Division/drug effects ; Cells, Cultured ; Cycloheximide/pharmacology ; DNA/biosynthesis ; Oncogenes/*drug effects ; Rats ; Thyroid Gland/*cytology/drug effects/metabolism ; Thyrotropin/*pharmacology
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  • 23
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    Perfumes and preference (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-03-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Easton, T A -- New York, N.Y. -- Science. 1986 Mar 14;231(4743):1235.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945820" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Homosexuality ; Humans ; Male ; *Perfume ; Rats ; *Sexual Behavior
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  • 24
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    Circulating atrial natriuretic peptides in conscious rats: regulation of release by multiple factors (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-02
    Description: Cardiocytes in the atria contain a prohormone that gives rise to atrial natriuretic peptides (ANP's), which have intrinsic hemodynamic regulatory activity. The distribution of ANP's in the brain suggests the involvement of these peptides in central cardiovascular regulation. In conscious rats with chronic indwelling catheters, volume loading with isotonic saline or glucose increased the amount of circulating immunoreactive ANP's by a factor of 4 to 5, as determined by radioimmunoassay. Hyperosmotic challenge with a hypertonic NaCl solution or anesthesia with halothane caused similar increases in plasma ANP's. Results obtained with the denervated-heart preparation indicate that neuronal influences are important in the release of ANP's induced by volume loading. As judged from reversed-phase high-performance liquid chromatography of extracted plasma and radioimmunoassay of collected fractions, the circulating physiologically important ANP's in the conscious rodent appear to be alpha-rANP(5-28) (atriopeptin III) and either alpha-rANP(3-28) [ANF(8-33)] or alpha-rANP(1-28) (ANF).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eskay, R -- Zukowska-Grojec, Z -- Haass, M -- Dave, J R -- Zamir, N -- New York, N.Y. -- Science. 1986 May 2;232(4750):636-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2938258" target="_blank"〉PubMed〈/a〉
    Keywords: Anesthesia ; Animals ; Atrial Natriuretic Factor/blood/isolation & purification/physiology/*secretion ; Blood Volume ; Chromatography, High Pressure Liquid ; Consciousness/physiology ; Halothane/pharmacology ; Heart/innervation ; Heart Atria/drug effects/secretion ; Male ; Osmotic Pressure ; Pentobarbital/pharmacology ; Peptide Fragments/isolation & purification ; Radioimmunoassay ; Rats ; Rats, Inbred Strains
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  • 25
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    A low threshold calcium spike mediates firing pattern alterations in pontine reticular neurons (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-11-07
    Description: Intracellular electrical recordings in an in vitro slice preparation of the brainstem medial pontine reticular formation, a region thought to be important in mediation of desynchronized sleep phenomena, demonstrate a population of neurons that have a calcium-dependent, low threshold spike. This low threshold spike was inactivated at relatively depolarized membrane potential levels and, when this spike was deinactivated, it induced a burst of action potentials. The membrane potential dependence of the spike may underlie changes in action potential firing patterns associated with behavioral state change because the baseline membrane potential in neurons of the medial pontine reticular population depolarizes during passage from waking and slow wave sleep to desynchronized sleep, which is characterized by the absence of burst firing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greene, R W -- Haas, H L -- McCarley, R W -- MH 39,683/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1986 Nov 7;234(4777):738-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775364" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Calcium/physiology ; Electric Stimulation ; In Vitro Techniques ; Membrane Potentials ; Pons/cytology/*physiology ; Rats
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  • 26
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    ras-transformed cells: altered levels of phosphatidylinositol-4,5-bisphosphate and catabolites (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-01-24
    Description: Steady-state cellular levels of phosphatidylinositol-4,5-bisphosphate (PIP2), 1,2-diacylglycerol (DAG), and inositol phosphates have been measured in two different fibroblast cell lines (NIH 3T3 and NRK cells) before and after transformation with three different ras genes. At high cell density the ratio of DAG to PIP2 was 2.5- to 3-fold higher in the ras-transformed cells than in their untransformed counterparts. The sum of the water-soluble breakdown products of the polyphosphoinositides, inositol-1,4-bisphosphate and inositol-1,4,5-trisphosphate, was also elevated in ras-transformed NRK cells compared with nontransformed NRK cells. These findings suggest that the ras (p21) protein may act by affecting these levels, possibly as a regulatory element in the PIP2 breakdown pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fleischman, L F -- Chahwala, S B -- Cantley, L -- GM 36133/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Jan 24;231(4736):407-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3001936" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Neoplastic/*analysis ; Diglycerides/analysis ; Humans ; Inositol 1,4,5-Trisphosphate ; Inositol Phosphates/analysis ; *Oncogenes ; Phosphatidylinositol 4,5-Diphosphate ; Phosphatidylinositols/*analysis ; Rats
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  • 27
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    The neuroendocrine thymus: coexistence of oxytocin and neurophysin in the human thymus (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-04-25
    Description: Immunoreactive oxytocin and neurophysin were identified and measured by radioimmunoassay in human thymus extracts. Serial dilutions of extracts paralleled the appropriate standard curves. Thymus-extracted oxytocin and neurophysin eluted in the same positions as reference preparations on Sephadex G-75. Authenticity of oxytocin was confirmed by biological assay and high-performance liquid chromatography analysis. In most instances, thymus contents of oxytocin and neurophysin were far greater than those expected from known circulating concentrations and declined with increasing age. The molar ratio of oxytocin to neurophysin in thymus was similar to that found in the hypothalamo-neurohypophyseal system, which strongly suggested with the other data a local synthesis of oxytocin. These findings indicate the presence of neurohypophyseal peptides in the human thymus and further support the concept of a neuroendocrine function integrated in an immune structure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geenen, V -- Legros, J J -- Franchimont, P -- Baudrihaye, M -- Defresne, M P -- Boniver, J -- New York, N.Y. -- Science. 1986 Apr 25;232(4749):508-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3961493" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Age Factors ; Child ; Chromatography, Gel ; Chromatography, High Pressure Liquid ; Female ; Humans ; Infant, Newborn ; Male ; Middle Aged ; Myasthenia Gravis/physiopathology ; Neurophysins/*analysis/isolation & purification/physiology ; Oxytocin/*analysis/isolation & purification/physiology ; Radioimmunoassay ; Thymus Gland/*analysis/physiology/physiopathology
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  • 28
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    Inhibition of endothelial regeneration by type-beta transforming growth factor from platelets (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-09-05
    Description: Damage to the vessel wall is a signal for endothelial migration and replication and for platelet release at the site of injury. Addition of transforming growth factor-beta (TGF-beta) purified from platelets to growing aortic endothelial cells inhibited [3H]thymidine incorporation in a concentration-dependent manner. A transient inhibition of DNA synthesis was also observed in response to wounding; cell migration and replication are inhibited during the first 24 hours after wounding. By 48 hours after wounding both TGF-beta-treated and -untreated cultures showed similar responses. Flow microfluorimetric analysis of cell cycle distribution indicated that after 24 hours of exposure to TGF-beta the cells were blocked from entering S phase, and the fraction of cells in G1 was increased. The inhibition of the initiation of regeneration by TGF-beta could allow time for recruitment of smooth muscle cells into the site of injury by other platelet components.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heimark, R L -- Twardzik, D R -- Schwartz, S M -- HL-18645/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1986 Sep 5;233(4768):1078-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3461562" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Platelets/*physiology ; Cell Cycle/drug effects ; Cell Movement/drug effects ; Cells, Cultured ; Endothelium/cytology/*physiology ; Flow Cytometry ; *Growth Inhibitors ; Humans ; In Vitro Techniques ; Peptides/*pharmacology ; Rats ; Regeneration ; Transforming Growth Factors
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  • 29
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    Thyroid hormone induction of an autocrine growth factor secreted by pituitary tumor cells (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-12-19
    Description: Thyroid hormones stimulate the rate of cell division by poorly understood mechanisms. The possibility that thyroid hormones increase cell growth by stimulating secretion of a growth factor was investigated. Thyroid hormones are nearly an absolute requirement for the division of GH4C1 rat pituitary tumor cells plated at low density. Conditioned media from cells grown with or without L-triiodothyronine (T3) were treated with an ion exchange resin to remove T3 and were tested for ability to stimulate the division of GH4C1 cells. Conditioned medium from T3-treated cells was as active as thyroid hormone at promoting GH4C1 cell growth but did not elicit other thyroid hormone responses, induction of growth hormone, and down-regulation of thyrotropin-releasing hormone receptors, as effectively as T3 did. A substance or substances associated with T3-induced growth stimulatory activity migrated at high molecular weight at neutral pH and was different from known growth-promoting hormones induced by T3. The results demonstrate that thyroid hormones stimulate the division of GH4C1 pituitary cells by stimulating the secretion of an autocrine growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hinkle, P M -- Kinsella, P A -- AM 32847/AM/NIADDK NIH HHS/ -- AM/NS 00827/AM/NIADDK NIH HHS/ -- CA 11198/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 Dec 19;234(4783):1549-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3097825" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cell Line ; Epidermal Growth Factor/metabolism ; Growth Hormone/metabolism ; Growth Substances/*secretion ; Nerve Growth Factors/metabolism ; Pituitary Neoplasms/*metabolism/pathology ; Rats ; Thyrotropin-Releasing Hormone/metabolism ; Triiodothyronine/*pharmacology
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  • 30
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    Growing focus on criminal careers (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1986 Sep 26;233(4771):1377-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3749882" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; *Adolescent Behavior ; Adult ; *Crime ; Government Agencies ; Humans ; Middle Aged ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Researchers grapple with problems of updating classic psychological test (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1986 Sep 19;233(4770):1249-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3749875" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Female ; Humans ; *Mmpi ; Male ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Brain glutamate decarboxylase cloned in lambda gt-11: fusion protein produces gamma-aminobutyric acid (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-30
    Description: Glutamate decarboxylase (GAD; E.C. 4.1.1.15) converts glutamate to gamma-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the vertebrate central nervous system. This report describes the isolation of a GAD complementary DNA clone by immunological screening of a lambda gt-11 brain complementary DNA expression library. The fusion protein produced by this clone catalyzes the conversion of glutamate to GABA and carbon dioxide, confirming its identity as GAD. Antibodies to beta-galactosidase remove GAD enzymatic activity from solution, showing that this activity is associated with the fusion protein. In immunoblotting experiments all three available antisera to GAD reacted with the fusion polypeptide and with two major polypeptides (molecular size, 60,000 and 66,000 daltons) in brain extracts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaufman, D L -- McGinnis, J F -- Krieger, N R -- Tobin, A J -- HD05615/HD/NICHD NIH HHS/ -- NS20356/NS/NINDS NIH HHS/ -- NS22256/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 May 30;232(4754):1138-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3518061" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*enzymology ; Cloning, Molecular ; DNA/genetics ; Escherichia coli/metabolism ; Glutamate Decarboxylase/biosynthesis/genetics/*metabolism ; Humans ; Mice ; Rats ; Recombinant Proteins/biosynthesis/metabolism ; gamma-Aminobutyric Acid/*biosynthesis
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    New rule proposed for protein degradation (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1986 Oct 10;234(4773):151-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3018927" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*metabolism ; Cells, Cultured ; Half-Life ; Proteins/*metabolism ; Ubiquitins/metabolism ; beta-Galactosidase/metabolism
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  • 34
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    Thyrotropin-releasing hormone precursor: characterization in rat brain (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-10
    Description: To characterize the precursor of mammalian thyrotropin-releasing hormone (TRH), a rat hypothalamic lambda gt11 library was screened with an antiserum directed against a synthetic peptide representing a portion of the rat TRH prohormone. The nucleotide sequence of the immunopositive complementary DNA encoded a protein with a molecular weight of 29,247. This protein contained five copies of the sequence Gln-His-Pro-Gly flanked by paired basic amino acids and could therefore generate five TRH molecules. In addition, potential cleavage sites in the TRH precursor could produce other non-TRH peptides, which may be secreted. In situ hybridization to rat brain sections demonstrated that the pre-proTRH complementary DNA detected neurons concentrated in the parvocellular division of the paraventricular nucleus, the same location as cells detected by immunohistochemistry. These findings indicate that mammalian TRH arises by posttranslational processing of a larger precursor protein. The ability of the TRH prohormone to generate multiple copies of the bioactive peptide may be an important mechanism in the amplification of hormone production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lechan, R M -- Wu, P -- Jackson, I M -- Wolf, H -- Cooperman, S -- Mandel, G -- Goodman, R H -- AM 34540/AM/NIADDK NIH HHS/ -- CA 37370/CA/NCI NIH HHS/ -- P30 AM 39428/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 Jan 10;231(4734):159-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3079917" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Brain/*physiology ; DNA/genetics ; Hypothalamus/physiology ; Molecular Weight ; Protein Precursors/genetics/*physiology ; Pyrrolidonecarboxylic Acid/analogs & derivatives ; Rats ; Rats, Inbred Strains ; Thyrotropin-Releasing Hormone/genetics/*physiology
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    Cerebellar vermis: essential for long-term habituation of the acoustic startle response (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-04-25
    Description: The acoustic startle response in rats shows both short-term habituation, which recovers in seconds or minutes, and long-term habituation, which is effectively permanent. Lesions of the cerebellar vermis significantly attenuated long-term habituation without affecting the short-term process or altering initial response levels. In this response system the cerebellar vermis is part of an essential circuit for long-term habituation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leaton, R N -- Supple, W F Jr -- New York, N.Y. -- Science. 1986 Apr 25;232(4749):513-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3961494" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Auditory Pathways/anatomy & histology/physiology ; Cerebellum/anatomy & histology/*physiology ; Habituation, Psychophysiologic/*physiology ; Male ; Rats ; Reflex, Startle/*physiology ; Reticular Formation/analysis/physiology
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  • 36
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    All members of the MHC multigene family respond to thyroid hormone in a highly tissue-specific manner (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-07
    Description: In mammals different isoforms of myosin heavy chain are encoded by the members of a multigene family. The expression of each gene of this family is regulated in a tissue- and developmental stage-specific manner as well as by hormonal and various pathological stimuli. In this study the molecular basis of isoform switches induced in myosin heavy chain by thyroid hormone was investigated. The expression of the myosin heavy chain gene family was analyzed in seven different muscles of adult rats subjected to hypo- or hyperthyroidism with complementary DNA probes specific for six different myosin heavy chain genes. The results demonstrate that all six genes are responsive to thyroid hormone. More interestingly, the same myosin heavy chain gene can be regulated by thyroid hormone in highly different modes, even in opposite directions, depending on the tissue in which it is expressed. Furthermore, the skeletal embryonic and neonatal myosin heavy chain genes, so far considered specific to these two developmental stages, can be reinduced by hypothyroidism in specific adult muscles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Izumo, S -- Nadal-Ginard, B -- Mahdavi, V -- New York, N.Y. -- Science. 1986 Feb 7;231(4738):597-600.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945800" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Diaphragm/drug effects/growth & development/metabolism ; Genes/*drug effects ; Heart/drug effects/growth & development ; Hyperthyroidism/metabolism ; Hypothyroidism/metabolism ; Male ; Muscle Development ; Muscles/drug effects/metabolism ; Myocardium/metabolism ; Myosins/*genetics ; Rats ; Thyroid Hormones/*pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Systemic ethanol: selective enhancement of responses to acetylcholine and somatostatin in hippocampus (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-10
    Description: In rat hippocampal pyramidal cells tested in situ by iontophoresis of several neurotransmitters, ethanol significantly enhanced excitatory responses to acetylcholine and inhibitory responses to somatostatin-14 but had no statistically significant effect on excitatory responses to glutamate or inhibitory responses to gamma-aminobutyric acid or, in preliminary tests, to norepinephrine or serotonin. The effects of ethanol on responses to acetylcholine and somatostatin-14 may provide insight into synaptic mechanisms underlying the behavioral consequences of ethanol intoxication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mancillas, J R -- Siggins, G R -- Bloom, F E -- AA-06420/AA/NIAAA NIH HHS/ -- AM-26741/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 Jan 10;231(4734):161-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2867600" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/*pharmacology ; Action Potentials/drug effects ; Animals ; Ethanol/*pharmacology ; Goldfish ; Hippocampus/*drug effects ; Male ; Neurons/drug effects/physiology ; Norepinephrine/pharmacology ; Rats ; Rats, Inbred Strains ; Serotonin/pharmacology ; Somatostatin/*pharmacology ; Synaptic Membranes/drug effects ; 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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  • 38
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    Stimulation of gonadotropin release by a non-GnRH peptide sequence of the GnRH precursor (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-04-04
    Description: The human gonadotropin-releasing hormone (GnRH) precursor comprises the GnRH sequence followed by an extension of 59 amino acids. Basic amino acid residues in the carboxyl terminal extension may represent sites of processing to biologically active peptides. A synthetic peptide comprising the first 13 amino acids (H X Asp-Ala-Glu-Asn-Leu-Ile-Asp-Ser-Phe-Gln-Glu-Ile-Val X OH) of the 59-amino acid peptide was found to stimulate the release of gonadotropic hormones from human and baboon anterior pituitary cells in culture. The peptide did not affect thyrotropin or prolactin secretion. A GnRH antagonist did not inhibit gonadotropin stimulation by the peptide, and the peptide did not compete with GnRH for GnRH pituitary receptors, indicating that the action of the peptide is independent of the GnRH receptor. The GnRH precursor contains two distinct peptide sequences capable of stimulating gonadotropin release from human and baboon pituitary cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Millar, R P -- Wormald, P J -- Milton, R C -- New York, N.Y. -- Science. 1986 Apr 4;232(4746):68-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3082009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Follicle Stimulating Hormone/*secretion ; Gonadotropin-Releasing Hormone/*analogs & derivatives/*pharmacology ; Humans ; Kinetics ; Luteinizing Hormone/*secretion ; Papio ; Peptide Fragments/*pharmacology ; Peptides/*pharmacology ; Pituitary Gland, Anterior/drug effects/*secretion ; Protein Precursors/*pharmacology ; Structure-Activity Relationship
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    Age and infertility (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-09-26
    Description: Direct evidence on age patterns of infecundity and sterility cannot be obtained from contemporary populations because such large fractions of couples use contraception or have been sterilized. Instead, historical data are exploited to yield upper bounds applicable to contemporary populations on the proportions sterile at each age. Examination of recent changes in sexual behavior that may increase infecundity indicates that sexually transmitted infections, the prime candidate for hypothesized rises in infertility, are unlikely to have added to infecundity to any great extent. These results imply that a woman in a monogamous union faces only moderate increases in the probability of becoming sterile (or infecund) until her late thirties. Nevertheless, it appears that recent changes in reproductive behavior were guaranteed to result in the perception that infecundity is on the rise.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Menken, J -- Trussell, J -- Larsen, U -- HD11720/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1986 Sep 26;233(4771):1389-94.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3755843" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Age Factors ; *Aging ; Female ; *Fertility ; Humans ; Infertility, Female/*epidemiology ; Infertility, Male/*epidemiology ; Male ; Marriage ; Middle Aged ; United States
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  • 40
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    Effects of alcohol on the generation and migration of cerebral cortical neurons (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-19
    Description: Prenatal exposure to alcohol produces many developmental defects of the central nervous system, such as microcephaly, mental retardation, motor dysfunction, and cognitive deficiencies. Therefore, the generation of neurons in the cerebral cortex was examined in the offspring of female rats fed a diet containing ethanol. Prenatal exposure to ethanol delayed and extended the period during which cortical neurons were generated, reduced the number of neurons in the nature cortex with the same time of origin, and altered the distribution of neurons generated on a particular day. Thus, the proliferation and migration of cortical neurons are profoundly affected by in utero exposure to ethanol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, M W -- AA 06916/AA/NIAAA NIH HHS/ -- New York, N.Y. -- Science. 1986 Sep 19;233(4770):1308-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3749878" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cerebral Cortex/*drug effects/embryology ; Ethanol/*pharmacology ; Female ; Gestational Age ; Humans ; Motor Cortex/drug effects/embryology ; Neurons/*drug effects/embryology ; Pregnancy ; Rats
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  • 41
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    Mechanism of the rapid effect of 17 beta-estradiol on medial amygdala neurons (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-11
    Description: The mechanism by which sex steroids rapidly modulate the excitability of neurons was investigated by intracellular recording of neurons in rat medial amygdala brain slices. Brief hyperpolarization and increased potassium conductance were produced by 17 beta-estradiol. This effect persisted after elimination of synaptic input and after suppression of protein synthesis. Thus, 17 beta-estradiol directly changes the ionic conductance of the postsynaptic membrane of medial amygdala neurons. In addition, a greater proportion of the neurons from females than from males responded to 17 beta-estradiol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nabekura, J -- Oomura, Y -- Minami, T -- Mizuno, Y -- Fukuda, A -- New York, N.Y. -- Science. 1986 Jul 11;233(4760):226-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3726531" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/cytology/*drug effects ; Animals ; Cycloheximide/pharmacology ; Dactinomycin/pharmacology ; Estradiol/*pharmacology ; Female ; Male ; Membrane Potentials/drug effects ; Neurons/drug effects/physiology ; Rats ; Rats, Inbred Strains
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  • 42
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    Measurement of brain deoxyglucose metabolism by NMR (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson, T -- Lucignani, G -- Sokoloff, L -- New York, N.Y. -- Science. 1986 May 9;232(4751):776-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3008340" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; Brain Chemistry ; Deoxy Sugars/*metabolism ; Deoxyglucose/*metabolism ; Glucose-6-Phosphatase/metabolism ; *Glucose-6-Phosphate/*analogs & derivatives ; Glucosephosphates/analysis ; *Magnetic Resonance Spectroscopy ; Rats
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  • 43
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    GABA receptor-mediated chloride transport in a "cell-free" membrane preparation from brain (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, S M -- Schwartz, R D -- Creveling, C R -- Hollingsworth, E B -- Daly, J W -- Skolnick, P -- New York, N.Y. -- Science. 1986 Jul 11;233(4760):228-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3014649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Brain/*metabolism ; Cell Membrane/metabolism/*physiology ; Chick Embryo ; Chlorides/*metabolism ; Guinea Pigs ; Mice ; Rats ; Receptors, GABA-A/metabolism/*physiology ; Synaptosomes/metabolism
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  • 44
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    Epidemiology of drug abuse: an overview (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-11-21
    Description: Issues regarding the use of epidemiology in drug abuse research are discussed and systems for monitoring national trends and identifying risk factors are described. Data indicate a general decline in marijuana use among youth, a cohort aging effect among heroin and marijuana users, and increased prevalence and health consequences associated with cocaine use.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kozel, N J -- Adams, E H -- New York, N.Y. -- Science. 1986 Nov 21;234(4779):970-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3490691" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/complications ; Adolescent ; Adult ; Child ; Cocaine ; Epidemiologic Methods ; Female ; Heroin ; Humans ; Male ; Marijuana Abuse/epidemiology ; Population Surveillance ; Risk ; Substance-Related Disorders/*epidemiology
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  • 45
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    Pertussis toxin-sensitive pathway in the stimulation of c-myc expression and DNA synthesis by bombesin (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-11-28
    Description: The bombesin-like peptides are potent mitogens for Swiss 3T3 fibroblasts, human bronchial epithelial cells, and cells isolated from small cell carcinoma of the lung. The mechanism of signal transduction in the proliferative response to bombesin was investigated by studying the effect of Bordetella pertussis toxin on bombesin-stimulated mitogenesis. At nanomolar concentrations, bombesin increased levels of c-myc messenger RNA and stimulated DNA synthesis in Swiss 3T3 cells. Treatment of the cells with pertussis toxin (5 nanograms per milliliter) completely blocked bombesin-enhanced c-myc expression and eliminated bombesin-stimulated DNA synthesis. This treatment had essentially no effect on the mitogenic responses to either platelet-derived growth factor or phorbol 12,13-dibutyrate. These results suggest that the mitogenic actions of bombesin-like growth factors are mediated through a pertussis toxin-sensitive guanine nucleotide-binding protein. Furthermore they indicate that bombesin-like growth factors act through pathways that are different from those activated by platelet-derived growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Letterio, J J -- Coughlin, S R -- Williams, L T -- R01 HL 32898/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1986 Nov 28;234(4780):1117-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3465038" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bombesin/*pharmacology ; Cells, Cultured ; DNA, Neoplasm/*biosynthesis ; Humans ; Mice ; Oncogenes/*drug effects ; *Pertussis Toxin ; Phorbol 12,13-Dibutyrate ; Phorbol Esters/pharmacology ; Platelet-Derived Growth Factor/pharmacology ; Virulence Factors, Bordetella/*pharmacology
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  • 46
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    Cultivation of Rhinosporidium seeberi in vitro: interaction with epithelial cells (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-24
    Description: Rhinosporidium seeberi, a fungus that is associated with polyp-like tumors in animals and man, was successfully cultivated. This organism stimulated proliferation of epithelial cells in vitro, producing polyp-like structures. Spores produced in culture required a period of aging or development, or both, before they were capable of reinitiating the growth cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levy, M G -- Meuten, D J -- Breitschwerdt, E B -- New York, N.Y. -- Science. 1986 Oct 24;234(4775):474-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3764422" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle ; Cells, Cultured ; Dogs ; Epithelium/microbiology ; Humans ; Polyps/microbiology ; Rhinosporidium/*growth & development
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  • 47
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    Human melanoma proteoglycan: expression in hybrids controlled by intrinsic and extrinsic signals (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-03-14
    Description: Human malignant melanoma cells express specific chondroitin sulfate proteoglycans (mel-CSPG) on the surface, both in vivo and in vitro. Melanocytes in normal skin show no detectable mel-CSPG but can be induced to express the antigen when cultured in the presence of cholera toxin and the tumor promoter 12-O-tetradecanoylphorbol-13-acetate. Most other cell types do not express mel-CSPG either in vivo or in vitro. A study was designed to examine regulatory signals controlling mel-CSPG expression. The gene encoding mel-CSPG was mapped to human chromosome 15, and this chromosome was introduced into rodent cells derived from distinct differentiation lineages. Three types of mel-CSPG--expressing hybrids were found: (i) hybrids derived from human melanomas; (ii) hybrids derived from human cells that do not express mel-CSPG; and (iii) hybrids derived from human cells expressing mel-CSPG that are antigen-negative but that are induced to express mel-CSPG when cultured on extracellular matrix instead of plastic surfaces. Thus, mel-CSPG expression can be controlled both through intrinsic signals, provided by the differentiation program of the rodent fusion partner, and through extrinsic signals, provided by specific cell-matrix interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rettig, W J -- Real, F X -- Spengler, B A -- Biedler, J L -- Old, L J -- CA-08748/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 Mar 14;231(4743):1281-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3633135" target="_blank"〉PubMed〈/a〉
    Keywords: Aggrecans ; Animals ; Antibodies, Monoclonal ; Cell Line ; Cholera Toxin/pharmacology ; Chromosome Mapping ; Chromosomes, Human, 13-15 ; Cricetinae ; Cricetulus ; *Extracellular Matrix Proteins ; Gene Expression Regulation/drug effects ; Glycoproteins/*biosynthesis/genetics ; Humans ; Hybrid Cells/drug effects/*metabolism ; Lectins, C-Type ; Lymphocytes/metabolism ; Melanocytes/drug effects/metabolism ; Melanoma/*metabolism ; Mice ; Neoplasm Proteins/*biosynthesis/genetics ; Neuroblastoma/metabolism ; *Proteoglycans ; Rats ; Tetradecanoylphorbol Acetate/pharmacology
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    Laser-induced alteration of collagen substructure allows microsurgical tissue welding (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-13
    Description: Tissue welding is a potentially important biomedical application of laser technology. The structural alterations basic to this phenomenon were studied in experimental repair of lesions of the rat carotid artery and sciatic nerve. A modified neodymiumdoped yttrium-aluminum-garnet laser operating at a wavelength of 1.319 micrometers was used in conjunction with conventional suture techniques. Histological and fine-structural analysis revealed a homogenizing change in collagen with interdigitation of altered individual fibrils that appeared to be the structural basis of the welding effect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schober, R -- Ulrich, F -- Sander, T -- Durselen, H -- Hessel, S -- New York, N.Y. -- Science. 1986 Jun 13;232(4756):1421-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3715454" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carotid Arteries/*radiation effects ; *Collagen ; Dose-Response Relationship, Radiation ; Extracellular Matrix/radiation effects ; *Lasers ; Rats ; Sciatic Nerve/*radiation effects
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    Stress-induced inhibition of reproductive functions: role of endogenous corticotropin-releasing factor (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-07
    Description: In the adult castrated male rat, exposure to inescapable, intermittent electroshocks inhibited the pulsatile pattern of luteinizing hormone release and markedly lowered its plasma concentrations. The central administration of the corticotropin-releasing factor (CRF) antagonist alpha-helical ovine CRF residues 9 to 41 reversed the inhibitory action of stress. Neither its peripheral injection, nor the intraventricular injection of the inactive CRF analog des-Glu to Arg ovine CRF was effective. These results suggest that endogenous CRF may mediate some deleterious effects of noxious stimuli on reproduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rivier, C -- Rivier, J -- Vale, W -- AA03504/AA/NIAAA NIH HHS/ -- AM26741/AM/NIADDK NIH HHS/ -- HD13527/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1986 Feb 7;231(4738):607-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3003907" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/physiology ; Animals ; Corticotropin-Releasing Hormone/pharmacology/*physiology ; Electroshock ; Female ; Humans ; Luteinizing Hormone/blood ; Male ; Orchiectomy ; Rats ; *Reproduction/drug effects ; Stress, Psychological/*physiopathology
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    L-isoleucine and L-leucine: tumor promoters of bladder cancer in rats (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-21
    Description: A 4-week assay for screening tumor promoters of bladder cancer has been developed in which increased agglutinability of isolated rat bladder cells with concanavalin A is used as an indicator. On the basis of this assay system, L-isoleucine and L-leucine were suspected of being possible tumor promoters. Results of 40- to 60-week carcinogenesis experiments in which N-butyl-N-(4-hydroxybutyl)nitrosamine was used as an initiator demonstrate that L-isoleucine and L-leucine promote bladder cancer in rats. This finding may be relevant to the high incidence of human bladder cancer in Western countries, where the diet is rich in protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nishio, Y -- Kakizoe, T -- Ohtani, M -- Sato, S -- Sugimura, T -- Fukushima, S -- New York, N.Y. -- Science. 1986 Feb 21;231(4740):843-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945812" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Carcinogens ; Carcinoma/*chemically induced ; *Isoleucine ; *Leucine ; Papilloma/*chemically induced ; Precancerous Conditions/*chemically induced ; Rats ; Rats, Inbred F344 ; Urinary Bladder Neoplasms/*chemically induced
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    Studies and perspectives of protein kinase C (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-18
    Description: Protein kinase C, an enzyme that is activated by the receptor-mediated hydrolysis of inositol phospholipids, relays information in the form of a variety of extracellular signals across the membrane to regulate many Ca2+-dependent processes. At an early phase of cellular responses, the enzyme appears to have a dual effect, providing positive forward as well as negative feedback controls over various steps of its own and other signaling pathways, such as the receptors that are coupled to inositol phospholipid hydrolysis and those of some growth factors. In biological systems, a positive signal is frequently followed by immediate negative feedback regulation. Such a novel role of this protein kinase system seems to give a logical basis for clarifying the biochemical mechanism of signal transduction, and to add a new dimension essential to our understanding of cell-to-cell communication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nishizuka, Y -- New York, N.Y. -- Science. 1986 Jul 18;233(4761):305-12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3014651" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/metabolism ; Animals ; Blood Platelets/metabolism ; Calcimycin/pharmacology ; Calcium-Transporting ATPases/metabolism ; Carrier Proteins/metabolism ; *Cation Transport Proteins ; Cell Membrane/physiology ; Cyclic AMP/metabolism ; Diglycerides/metabolism ; Electric Conductivity ; Enzyme Activation ; Fluorescent Antibody Technique ; Isoenzymes/metabolism ; Models, Biological ; Phosphatidylinositols/*metabolism ; Potassium/metabolism ; Protein Kinase C/*metabolism ; Purkinje Cells/enzymology ; Rats ; Serotonin/blood ; Sodium/metabolism ; Sodium-Hydrogen Antiporter ; Tetradecanoylphorbol Acetate/pharmacology ; Time Factors
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    Antigens induced on erythrocytes by P. falciparum: expression of diverse and conserved determinants (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-10
    Description: Red blood cells that are infected with the malaria parasite Plasmodium falciparum express new antigens on their surface. In a study of these antigens in the erythrocytes of naturally infected children in the Gambia, an antibody-mediated agglutination assay revealed an extreme degree of antigenic diversity. Serum samples from each of ten children in the convalescent stage of malaria infection reacted with infected cells from the same child but generally not with infected cells from the other children. The Gambian children's erythrocytes also expressed shared determinants: sera from Gambian adults often reacted with the surface of infected cells from all of the children and were shown by adsorption and elution experiments to contain antibodies that recognized several isolates. Conserved determinants exposed on infected erythrocytes may be important for development of antimalarial immunity either naturally or through vaccination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marsh, K -- Howard, R J -- New York, N.Y. -- Science. 1986 Jan 10;231(4734):150-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2417315" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Agglutination Tests ; Antigens, Protozoan/*immunology ; Child ; *Epitopes ; Erythrocytes/immunology/*parasitology ; Gambia ; Humans ; Malaria/*immunology ; Plasmodium falciparum
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    A new approach to the oral administration of insulin and other peptide drugs (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-05
    Description: The oral administration of peptide drugs is well known to be precluded by their digestion in the stomach and small intestine. As a new approach to oral delivery, peptide drugs were coated with polymers cross-linked with azoaromatic groups to form an impervious film to protect orally administered drugs from digestion in the stomach and small intestine. When the azopolymer-coated drug reached the large intestine, the indigenous microflora reduced the azo bonds, broke the cross-links, and degraded the polymer film, thereby releasing the drug into the lumen of the colon for local action or for absorption. The ability of the azopolymer coating to protect and deliver orally administered peptide drugs was demonstrated in rats with the peptide hormones vasopressin and insulin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saffran, M -- Kumar, G S -- Savariar, C -- Burnham, J C -- Williams, F -- Neckers, D C -- AI 18710/AI/NIAID NIH HHS/ -- SO-7-RR05700-15/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1986 Sep 5;233(4768):1081-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3526553" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Animals ; Azo Compounds ; Blood Glucose/metabolism ; Diabetes Mellitus, Experimental/drug therapy ; Enterobacteriaceae/metabolism ; Insulin/*administration & dosage ; Lypressin/administration & dosage ; Peptides/*administration & dosage ; Polymers ; Rats ; *Tablets, Enteric-Coated
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    Transforming growth factor-beta: biological function and chemical structure (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-01
    Description: Transforming growth factor-beta (TGF-beta) is a multifunctional peptide that controls proliferation, differentiation, and other functions in many cell types. Many cells synthesize TGF-beta and essentially all of them have specific receptors for this peptide. TGF-beta regulates the actions of many other peptide growth factors and determines a positive or negative direction of their effects. Its marked ability to enhance formation of connective tissue in vivo suggests several therapeutic applications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sporn, M B -- Roberts, A B -- Wakefield, L M -- Assoian, R K -- New York, N.Y. -- Science. 1986 Aug 1;233(4763):532-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3487831" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division/drug effects ; Epidermal Growth Factor/metabolism ; Genes ; Humans ; Peptides/genetics/metabolism/pharmacology/*physiology ; Platelet-Derived Growth Factor/pharmacology ; Rats ; Transforming Growth Factors
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    Neutralization of HTLV-III/LAV replication by antiserum to thymosin alpha 1 (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-30
    Description: An antiserum prepared against thymosin alpha 1, a hormone secreted by the thymus gland, effectively neutralized the AIDS-associated virus [HTLV-III/LAV (clone BH-10)] and blocked its replication in H9 cells. Reverse transcriptase activity and expression of the HTLV-III/LAV antigens p15 and p24 were inhibited by purified immunoglobulin G preparations of antisera to thymosin alpha 1. The antiviral activity of the antiserum was found to be due to a region of homology between thymosin alpha 1 and p17, a product of the gag gene of HTLV-III/LAV. Comparison of the primary sequences of thymosin alpha 1 and the gag protein revealed a 44% to 50% homology in an 18-amino acid region, between positions 11 and 28 on thymosin alpha 1 and 92 and 109 on the gag protein. The effectiveness of the thymosin alpha 1 antiserum and of immunoglobulin G-enriched preparations in blocking replication of HTLV-III(BH-10) in H9 cells suggests a novel approach to the development of an AIDS vaccine. A vaccine directed against the gag protein might overcome the problem of genetic drift in the envelope region of the virus and be useful against all genetic variants of HTLV-III/LAV.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sarin, P S -- Sun, D K -- Thornton, A H -- Naylor, P H -- Goldstein, A L -- CA 24974/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 May 30;232(4754):1135-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3010464" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/microbiology ; Adult ; Animals ; Child ; Deltaretrovirus/*drug effects/physiology ; Gene Products, gag ; Humans ; Immune Sera/immunology/*pharmacology ; Immunoglobulin G/immunology ; Rabbits/immunology ; Retroviridae Proteins/immunology ; Thymosin/*analogs & derivatives/immunology ; Virus Replication/*drug effects
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    Differences in adrenergic recognition by pancreatic A and B cells (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-16
    Description: The adrenergic control of glucose homeostasis is mediated in part through variations in the release of pancreatic hormones. In this study, purified pancreatic A and B cells were used to identify the recognition and messenger units involved in the adrenergic regulation of glucagon and insulin release. Catecholamines induced beta-adrenergic receptor activity in A cells and alpha 2-adrenergic receptor activity in B cells. The two recognition units provoked opposite variations in the production of cellular cyclic adenosine monophosphate, the beta-adrenergic unit enhancing the nucleotide's permissive effect on amino acid-induced glucagon release and the alpha 2-adrenergic unit inhibiting that upon glucose-induced insulin release. In both cell types, catecholamines interact powerfully with the synergistic control of hormone release by nutrient- and (neuro)hormone-driven messenger systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schuit, F C -- Pipeleers, D G -- New York, N.Y. -- Science. 1986 May 16;232(4752):875-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2871625" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic beta-Agonists/pharmacology ; Adrenergic beta-Antagonists/pharmacology ; Animals ; Cyclic AMP/analysis ; Epinephrine/pharmacology ; Glucagon/secretion ; Insulin/secretion ; Islets of Langerhans/analysis/drug effects/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Receptors, Adrenergic, beta/drug effects/*physiology
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    Replication of the B19 parvovirus in human bone marrow cell cultures (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-22
    Description: The B19 parvovirus is responsible for at least three human diseases. The virus was successfully propagated in suspension cultures of human erythroid bone marrow from patients with hemolytic anemias; release of newly synthesized virus into the supernatants of infected cultures was observed. This culture system allowed study at a molecular level of events associated with the B19 life cycle. The B19 parvovirus replicated through high molecular weight intermediate forms, linked through a terminal hairpin structure. B19 replication in vitro was highly dependent on the erythropoietic content of cultures and on addition of the hormone erythropoietin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ozawa, K -- Kurtzman, G -- Young, N -- New York, N.Y. -- Science. 1986 Aug 22;233(4766):883-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3738514" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Hemolytic/*microbiology ; Bone Marrow/*microbiology ; Cells, Cultured ; Culture Media ; DNA, Viral/analysis ; Erythropoietin/metabolism ; Humans ; Parvoviridae/*growth & development ; Virus Replication
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    A selective imidazobenzodiazepine antagonist of ethanol in the rat (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    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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    Expression and cell type--specific processing of human preproenkephalin with a vaccinia recombinant (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-27
    Description: The posttranslational maturation of a complex precursor polyprotein, human proenkephalin, was assessed by infection of a wide spectrum of cell types with a recombinant vaccinia virus that expressed human proenkephalin. The infected cells rapidly produced both cellular and secreted Met-enkephalin immunoreactivity. Although each cell line could secrete intact proenkephalin, only a mouse pituitary line was capable of processing proenkephalin to mature enkephalin peptides. The quantity of intact proenkephalin secreted from BSC-40 cells (derived from African Green monkey kidney) was sufficient to establish the value of vaccinia virus as a mammalian cell expression vector.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, G -- Herbert, E -- Hruby, D E -- 7 RO1 DA04154-01/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1986 Jun 27;232(4758):1641-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3754979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cercopithecus aethiops ; Enkephalin, Methionine/biosynthesis ; Enkephalins/*biosynthesis/genetics ; Genetic Vectors ; Humans ; Mice ; Protein Precursors/*biosynthesis/genetics ; Rats ; Recombinant Proteins/*biosynthesis ; Vaccinia virus/*genetics
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    Shock and tissue injury induced by recombinant human cachectin (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-24
    Description: Cachectin (tumor necrosis factor), a protein produced in large quantities by endotoxin-activated macrophages, has been implicated as an important mediator of the lethal effect of endotoxin. Recombinant human cachectin was infused into rats in an effort to determine whether cachectin, by itself, can elicit the derangements of host physiology caused by administration of endotoxin. When administered in quantities similar to those produced endogenously in response to endotoxin, cachectin causes hypotension, metabolic acidosis, hemoconcentration, and death within minutes to hours, as a result of respiratory arrest. Hyperglycemia and hyperkalemia were also observed after infusion. At necropsy, diffuse pulmonary inflammation and hemorrhage were apparent on gross and histopathologic examination, along with ischemic and hemorrhagic lesions of the gastrointestinal tract, and acute renal tubular necrosis. Thus, it appears that a single protein mediator (cachectin) is capable of inducing many of the deleterious effects of endotoxin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tracey, K J -- Beutler, B -- Lowry, S F -- Merryweather, J -- Wolpe, S -- Milsark, I W -- Hariri, R J -- Fahey, T J 3rd -- Zentella, A -- Albert, J D -- New York, N.Y. -- Science. 1986 Oct 24;234(4775):470-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3764421" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/metabolism ; Endotoxins/toxicity ; Female ; Glycoproteins/*toxicity ; Humans ; Potassium/blood ; Rats ; Recombinant Proteins ; Shock/*chemically induced/pathology/physiopathology ; Sodium/blood ; Tumor Necrosis Factor-alpha
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    EPA proposal on alachlor nears (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-09-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1986 Sep 12;233(4769):1143-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3738527" target="_blank"〉PubMed〈/a〉
    Keywords: Acetamides/*adverse effects ; Animals ; *Government Agencies ; Herbicides/*adverse effects ; Humans ; Neoplasms/chemically induced ; Rats ; United States ; *United States Environmental Protection Agency
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    Effects of growth hormone-releasing factor in the brain (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wehrenberg, W B -- Ehlers, C L -- New York, N.Y. -- Science. 1986 Jun 6;232(4755):1271-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3085220" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arousal/drug effects ; Brain/*drug effects ; Electroencephalography ; Growth Hormone/blood ; Growth Hormone-Releasing Hormone/administration & dosage/*pharmacology ; Injections, Intraventricular ; Motor Activity/drug effects ; Rats
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    A blood vessel model constructed from collagen and cultured vascular cells (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-24
    Description: A model of a blood vessel was constructed in vitro. Its multilayered structure resembled that of an artery and it withstood physiological pressures. Electron microscopy showed that the endothelial cells lining the lumen and the smooth muscle cells in the wall were healthy and well differentiated. The lining of endothelial cells functioned physically, as a permeability barrier, and biosynthetically, producing von Willebrand's factor and prostacyclin. The strength of the model depended on its multiple layers of collagen integrated with a Dacron mesh.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weinberg, C B -- Bell, E -- New York, N.Y. -- Science. 1986 Jan 24;231(4736):397-400.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2934816" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/anatomy & histology/cytology ; Blood Vessels/*anatomy & histology/physiology ; Cattle ; Cells, Cultured ; Collagen/*physiology ; Endothelium/anatomy & histology/cytology ; Microscopy, Electron, Scanning ; *Models, Cardiovascular ; Muscle, Smooth, Vascular/anatomy & histology/cytology ; Polyethylene Terephthalates
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    A parathyroid hormone-like protein from cultured human keratinocytes (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-24
    Description: Parathyroid hormone-like factors have been found in extracts of tumors associated with humoral hypercalcemia of malignancy, many of which are of squamous epithelial origin. Cultured, nonmalignant human keratinocytes were examined for the production of similar factors. Keratinocyte-conditioned medium from ten cultures stimulated the production of cyclic adenosine monophosphate in clonally derived rat osteosarcoma cells sensitive to parathyroid hormone. Bovine [Nle8,18, Tyr34]PTH-(3-34)NH2, a competitive inhibitor of parathyroid hormone, stopped the adenylate cyclase production stimulated by keratinocyte-conditioned medium, but antisera to parathyroid hormone had no effect on such adenylate cyclase activity. The active component of keratinocyte-conditioned medium has a molecular weight exceeding that of native parathyroid hormone. These characteristics are shared by the parathyroid hormone receptor agonists associated with humoral hypercalcemia of malignancy, which suggests that normal human keratinocytes may produce a factor related to that produced by malignant tumors associated with humoral hypercalcemia of malignancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Merendino, J J Jr -- Insogna, K L -- Milstone, L M -- Broadus, A E -- Stewart, A F -- AM 30102/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 Jan 24;231(4736):388-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2417317" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Animals ; Cattle ; Cells, Cultured ; Cyclic AMP/metabolism ; Epidermis/*cytology/metabolism/physiology ; Humans ; Isoproterenol/pharmacology ; Keratins/*metabolism ; Mice ; Osteosarcoma/metabolism ; Parathyroid Hormone/pharmacology/*physiology ; Peptide Fragments/pharmacology ; Rats ; Teriparatide
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    Psychotomimesis mediated by kappa opiate receptors (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-15
    Description: The kappa opioid agonists are analgesics that seem to be free of undesired morphine-like effects. Their dysphoric actions observed with the kappa agonist cyclazocine are thought to be mediated by an action at sigma-phencyclidine receptors. The benzomorphan kappa agonist MR 2033 is inactive at sigma-phencyclidine receptors. In male subjects, the opiate-active (-)-isomer, but not the (+)-isomer, elicited dose-dependent dysphoric and psychotomimetic effects that were antagonized by naloxone. Thus, kappa opiate receptors seem to mediate psychotomimetic effects. In view of the euphorigenic properties of mu agonists, our results imply the existence of opposed opioid systems affecting emotional and perceptual experiences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pfeiffer, A -- Brantl, V -- Herz, A -- Emrich, H M -- New York, N.Y. -- Science. 1986 Aug 15;233(4765):774-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3016896" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Anxiety ; Benzomorphans/adverse effects/*pharmacology ; Humans ; Male ; Middle Aged ; Morphinans/*pharmacology ; Naloxone/pharmacology ; Personality Tests ; Phencyclidine/pharmacology ; Receptors, Opioid/drug effects/*physiology ; Receptors, Opioid, kappa
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    A critical period for macromolecular synthesis in long-term heterosynaptic facilitation in Aplysia (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-12-05
    Description: Both long-term and short-term sensitization of the gill and siphon withdrawal reflex in Aplysia involve facilitation of the monosynaptic connections between the sensory and motor neurons. To analyze the relationship between these two forms of synaptic facilitation at the cellular and molecular level, this monosynaptic sensorimotor component of the gill-withdrawal reflex of Aplysia can be reconstituted in dissociated cell culture. Whereas one brief application of 1 microM serotonin produced short-term facilitation in the sensorimotor connection that lasted minutes, five applications over 1.5 hours resulted in long-term facilitation that lasted more than 24 hours. Inhibitors of protein synthesis or RNA synthesis selectively blocked long-term facilitation, but not short-term facilitation, indicating that long-term facilitation requires the expression of gene products not essential for short-term facilitation. Moreover, the inhibitors only blocked long-term facilitation when given during the serotonin applications; the inhibitors did not block the facilitation when given either before or after serotonin application. These results parallel those for behavioral performance in vertebrates and indicate that the critical time window characteristic of the requirement for macromolecular synthesis in long-term heterosynaptic facilitation is not a property of complex circuitry, but an intrinsic characteristic of specific nerve cells and synaptic connections involved in the long-term storage of information.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Montarolo, P G -- Goelet, P -- Castellucci, V F -- Morgan, J -- Kandel, E R -- Schacher, S -- NS 19595/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Dec 5;234(4781):1249-54.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775383" target="_blank"〉PubMed〈/a〉
    Keywords: Amanitins/pharmacology ; Anisomycin/pharmacology ; Aplysia/*physiology ; Cells, Cultured ; Memory/*physiology ; Memory, Short-Term/physiology ; Motor Neurons/drug effects ; Neurons, Afferent/drug effects ; Protein Biosynthesis ; RNA, Messenger/biosynthesis ; Reflex/drug effects ; Serotonin/pharmacology
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    Protein modification by amino acid addition is increased in crushed sciatic but not optic nerves (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-02-07
    Description: Rat optic and sciatic nerves were crushed, and 10 minutes to 3 days later nerve segments between the crushed site and the cell body were removed and assayed for posttranslational protein modification by amino acid addition. Protein modification was comparable in intact optic and sciatic nerves, but in sciatic nerves increased to 1.6 times control levels 10 minutes after crushing and reached a maximum of ten times control levels by 2 hours. In optic nerves activity was decreased throughout the time course studied. The results indicate that, in a nerve which is capable of regeneration (sciatic), protein modification by the addition of amino acids increases immediately after injury, but a nerve incapable of regeneration (optic) is incapable of activating the modification reaction. These findings may be important in understanding the reasons for the lack of a regenerative response after injury to central mammalian nerves.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shyne-Athwal, S -- Riccio, R V -- Chakraborty, G -- Ingoglia, N A -- NS19148/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Feb 7;231(4738):603-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3080804" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*metabolism ; Animals ; Arginine/metabolism ; Decapodiformes ; Goldfish ; Leucine/metabolism ; Lysine/metabolism ; Nerve Regeneration ; Nerve Tissue Proteins/*metabolism ; Optic Nerve/*metabolism/physiology ; Optic Nerve Injuries ; Rats ; Sciatic Nerve/injuries/*metabolism/physiology ; Time Factors
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    Functional differences between two classes of sodium channels in developing rat skeletal muscle (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-18
    Description: Excitability is generated in developing skeletal muscle by the incorporation of sodium-selective ion channels into the surface membrane. Whole-cell and patch voltage-clamp recording from myotubes and their embryologic precursors, myoblasts, indicated that voltage-activated sodium current in myoblasts was more resistant to block by tetrodotoxin (TTX) than that in myotubes. Single-channel recording from both cell types showed two classes of sodium channels. One class had a lower single-channel conductance, activated at more hyperpolarized voltages, and was more resistant to TTX than the other. The proportion of TTX-resistant to TTX-sensitive sodium channels was higher in myoblasts than in myotubes. Thus, the difference in TTX sensitivity between myoblasts and myotubes can be explained by a difference in the proportion of the two classes of sodium channels. In addition, the lower conductance of TTX-resistant channels provides insight into the relationship between the TTX binding site and the external mouth of the sodium channel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, R E -- Horn, R -- NS 00703/NS/NINDS NIH HHS/ -- NS 18608/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Jul 18;233(4761):361-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2425432" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Drug Resistance ; Electric Conductivity ; Electric Stimulation ; Ion Channels/drug effects/*physiology ; *Muscle Development ; Muscles/metabolism ; Rats ; Sodium/*metabolism ; Tetrodotoxin/pharmacology
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    Measurement of single channel currents from cardiac gap junctions (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-29
    Description: Cardiac gap junctions consist of arrays of integral membrane proteins joined across the intercellular cleft at points of cell-to-cell contact. These junctional proteins are thought to form pores through which ions can diffuse from cytosol to cytosol. By monitoring whole-cell currents in pairs of embryonic heart cells with two independent patch-clamp circuits, the properties of single gap junction channels have been investigated. These channels had a conductance of about 165 picosiemens and underwent spontaneous openings and closings that were independent of voltage. Channel activity and macroscopic junctional conductance were both decreased by the uncoupling agent 1-octanol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Veenstra, R D -- DeHaan, R L -- HL-06909/HL/NHLBI NIH HHS/ -- HL-27385/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1986 Aug 29;233(4767):972-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2426781" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chick Embryo ; Electric Conductivity ; Guinea Pigs ; Heart/embryology ; Intercellular Junctions/*physiology ; Ion Channels/*cytology ; Myocardium/*cytology ; Rats
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    Long-term cultures of HTLV-III--infected T cells: a model of cytopathology of T-cell depletion in AIDS (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-02-21
    Description: Long-term cultures were established of HTLV-III-infected T4 cells from patients with the acquired immune deficiency syndrome (AIDS) and of T4 cells from normal donors after infection of the cells in vitro. By initially reducing the number of cells per milliliter of culture medium it was possible to grow the infected cells for 50 to 60 days. As with uninfected T cells, immunologic activation of the HTLV-III-infected cells with phytohemagglutinin led to patterns of gene expression typical of T-cell differentiation, such as production of interleukin-2 and expression of interleukin-2 receptors, but in the infected cells immunologic activation also led to expression of HTLV-III, which was followed by cell death. The results revealed a cytopathogenic mechanism that may account for T4 cell depletion in AIDS patients and suggest how repeated antigenic stimulation by infectious agents, such as malaria in Africa, or by allogeneic blood or semen, may be important determinants of the latency period in AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zagury, D -- Bernard, J -- Leonard, R -- Cheynier, R -- Feldman, M -- Sarin, P S -- Gallo, R C -- New York, N.Y. -- Science. 1986 Feb 21;231(4740):850-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2418502" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/immunology/microbiology/*pathology ; Antigens, Differentiation, T-Lymphocyte ; Antigens, Surface/analysis ; Cell Differentiation ; Cells, Cultured ; Cytopathogenic Effect, Viral ; Deltaretrovirus/*growth & development ; Gene Expression Regulation ; Humans ; Interleukin-2/biosynthesis ; RNA-Directed DNA Polymerase/metabolism ; Receptors, Immunologic/biosynthesis ; Receptors, Interleukin-2 ; T-Lymphocytes/immunology/*microbiology
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    Nerve activity alters neurotransmitter synthesis (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1986 Jun 20;232(4757):1500-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2872725" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/physiology ; Cells, Cultured ; Neurons/cytology/*metabolism ; Neurotransmitter Agents/*biosynthesis ; Peripheral Nerves/physiology
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    Induction of suppressor cells specific for AChR in experimental autoimmune myasthenia gravis (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-04-18
    Description: Suppressor cells specific for acetylcholine receptor (AChR) were induced in a population of lymphocytes previously sensitized to AChR, obtained from rats with experimental autoimmune myasthenia gravis (EAMG). The lymphocytes were cultured with the immunosuppressive drug cyclosporin A plus purified AChR for 7 days. These cells, when mixed with lymphocytes from rats with EAMG in vitro, strongly suppressed the antibody response to AChR. They did not inhibit antibody responses to an unrelated antigen, an indication that suppression was specific for AChR. This approach should be a useful way to induce specific suppressor cells from sensitized populations of lymphocytes and may be applicable in the treatment of autoimmune diseases such as myasthenia gravis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McIntosh, K R -- Drachman, D B -- 5RO1 HD04817-16/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1986 Apr 18;232(4748):401-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2938256" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cyclosporins/pharmacology ; Female ; Lymph Nodes/cytology ; Lymphocytes/drug effects ; Myasthenia Gravis/*immunology ; Rats ; Rats, Inbred Lew ; Receptors, Cholinergic/*immunology ; Spleen/cytology ; T-Lymphocytes, Regulatory/*immunology
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    The 1985 Nobel Prize in physiology or medicine (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-01-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Motulsky, A G -- New York, N.Y. -- Science. 1986 Jan 10;231(4734):126-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3510453" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Arteriosclerosis/therapy ; Cholesterol/blood/metabolism ; Endocytosis ; History, 20th Century ; Humans ; Hyperlipoproteinemia Type II/genetics/therapy ; Lipoproteins/metabolism ; Male ; Middle Aged ; Mutation ; *Nobel Prize ; Receptors, LDL/genetics ; United States
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    Pancreatic zymogen granules differ markedly in protein composition (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-05-16
    Description: The activities of both chymotrypsin and amylase in individual zymogen granules of rat pancreas were measured by means of micromanipulation and microfluorometric methods. The enzyme content and the ratio of amylase to chymotrypsin varied widely among granules taken from the same animal. These results are compatible with short-term nonparallel bulk secretion of the two enzymes through exocytosis. The distribution of each enzyme activity in a population of granules suggests quantal packaging of amylase and chymotrypsinogen into the granules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mroz, E A -- Lechene, C -- AM26488/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 May 16;232(4752):871-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2422756" target="_blank"〉PubMed〈/a〉
    Keywords: Amylases/*analysis ; Animals ; Chymotrypsin/*analysis ; Cytoplasmic Granules/*analysis ; Exocytosis ; Female ; Pancreas/*secretion ; Rats ; Rats, Inbred Strains
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    Caffeine-induced uncoupling of mitosis from the completion of DNA replication in mammalian cells (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-06-06
    Description: Caffeine was shown to induce mitotic events in mammalian cells before DNA replication (S phase) was completed. Synchronized BHK cells that were arrested in early S phase underwent premature chromosome condensation, nuclear envelope breakdown, morphological "rounding up," and mitosis-specific phosphoprotein synthesis when they were exposed to caffeine. These mitotic responses occurred only after the cells had entered S phase and only while DNA synthesis was inhibited by more than 70 percent. Inhibitors of protein synthesis blocked these caffeine-induced events, while inhibitors of RNA synthesis had little effect. These results suggest that caffeine induces the translation or stabilizes the protein product (or products) of mitosis-related RNA that accumulates in S-phase cells when DNA replication is suppressed. The ability to chemically manipulate the onset of mitosis should be useful for studying the regulation of this event in mammalian cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schlegel, R -- Pardee, A B -- CA 22427/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 Jun 6;232(4755):1264-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2422760" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caffeine/*pharmacology ; Cells, Cultured ; Cricetinae ; Cycloheximide/pharmacology ; *DNA Replication ; Dactinomycin/pharmacology ; Interphase ; Mitosis/*drug effects ; RNA/metabolism
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    Inhibin-mediated feedback control of follicle-stimulating hormone secretion in the female rat (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-10-10
    Description: The secretion of follicle-stimulating hormone (FSH) by the anterior pituitary gland is regulated by the interaction of hypothalamic and gonadal hormones. Recently, proteins termed inhibins that selectively suppress FSH secretion have been purified and characterized from the gonadal fluids of several species. Antibodies to a synthetic peptide encompassing the amino terminal 25 residues of the recently characterized porcine inhibin were used to develop a specific radioimmunoassay (RIA) for inhibin and to neutralize endogenous inhibin during the estrous cycle of the rat. The administration of 20 international units of pregnant mare serum gonadotropin (PMSG) stimulated the secretion of inhibin in intact immature female rats, whereas ovariectomy caused an abrupt decrease in plasma inhibin concentrations that were not prevented by the injection of PMSG. The infusion of a polyclonal antiserum to inhibin, from 12 noon on proestrus to 1 a.m. on the morning of estrus, as well as its acute intravenous injection during diestrus I or II, caused an increase in plasma FSH (but not luteinizing hormone) concentrations. These results support the hypothesis of a feedback loop between the release of ovarian inhibin and FSH in the female rat.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rivier, C -- Rivier, J -- Vale, W -- HD13527/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1986 Oct 10;234(4773):205-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3092356" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Estrus ; Female ; Follicle Stimulating Hormone/blood/*secretion ; Gonadotropins, Equine/pharmacology ; Immune Sera ; Inhibins/blood/immunology/*secretion ; Luteinizing Hormone/blood ; Ovariectomy ; Proestrus ; Rats ; Rats, Inbred Strains
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  • 77
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    Steroid hormone metabolites are barbiturate-like modulators of the GABA receptor (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-05-23
    Description: Two metabolites of the steroid hormones progesterone and deoxycorticosterone, 3 alpha-hydroxy-5 alpha-dihydroprogesterone and 3 alpha, 5 alpha-tetrahydrodeoxycorticosterone, are potent barbiturate-like ligands of the gamma-aminobutyric acid (GABA) receptor-chloride ion channel complex. At concentrations between 10(-7) and 10(-5)M both steroids inhibited binding of the convulsant t-butylbicyclophosphorothionate to the GABA-receptor complex and increased the binding of the benzodiazepine flunitrazepam; they also stimulated chloride uptake (as measured by uptake of 36Cl-) into isolated brain vesicles, and potentiated the inhibitory actions of GABA in cultured rat hippocampal and spinal cord neurons. These data may explain the ability of certain steroid hormones to rapidly alter neuronal excitability and may provide a mechanism for the anesthetic and hypnotic actions of naturally occurring and synthetic anesthetic steroids.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Majewska, M D -- Harrison, N L -- Schwartz, R D -- Barker, J L -- Paul, S M -- New York, N.Y. -- Science. 1986 May 23;232(4753):1004-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2422758" target="_blank"〉PubMed〈/a〉
    Keywords: 20-alpha-Dihydroprogesterone/*analogs & derivatives/metabolism/pharmacology ; Animals ; Bicyclo Compounds/metabolism ; *Bicyclo Compounds, Heterocyclic ; Binding, Competitive ; Brain/metabolism ; Cells, Cultured ; Chlorides/metabolism ; Desoxycorticosterone/*analogs & derivatives/metabolism/pharmacology ; Drug Synergism ; Flunitrazepam/metabolism ; Hippocampus/metabolism ; In Vitro Techniques ; Ion Channels/metabolism ; Progesterone/*analogs & derivatives/metabolism/pharmacology ; Rats ; Receptors, GABA-A/*drug effects/metabolism ; Spinal Cord/metabolism
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  • 78
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    Involuntary smokers face health risks (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-11-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1986 Nov 28;234(4780):1066-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775375" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Child ; Humans ; Tobacco Smoke Pollution/*adverse effects
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  • 79
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    A protein induced during nerve growth (GAP-43) is a major component of growth-cone membranes (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-08-15
    Description: Growth cones are specialized structures that form the distal tips of growing axons. During both normal development of the nervous system and regeneration of injured nerves, growth cones are essential for elongation and guidance of growing axons. Developmental and regenerative axon growth is frequently accompanied by elevated synthesis of a protein designated GAP-43. GAP-43 has now been found to be a major component of growth-cone membranes in developing rat brains. Relative to total protein, GAP-43 is approximately 12 times as abundant in growth-cone membranes as in synaptic membranes from adult brains. Immunohistochemical localization of GAP-43 in frozen sections of developing brain indicates that the protein is specifically associated with neuropil areas containing growth cones and immature synaptic terminals. The results support the proposal that GAP-43 plays a role in axon growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skene, J H -- Jacobson, R D -- Snipes, G J -- McGuire, C B -- Norden, J J -- Freeman, J A -- EY01117/EY/NEI NIH HHS/ -- EY03718/EY/NEI NIH HHS/ -- NS18103/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Aug 15;233(4765):783-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3738509" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Animals, Newborn ; Anura ; Axons/physiology ; Brain/growth & development/*physiology ; Cell Membrane/metabolism ; Fetus ; GAP-43 Protein ; Growth Substances/*biosynthesis/isolation & purification ; Membrane Proteins/*biosynthesis/isolation & purification ; *Nerve Regeneration ; Nerve Tissue Proteins/*biosynthesis/isolation & purification ; Optic Nerve/cytology/*physiology ; Rats ; Synaptic Membranes/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 80
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    Regulation by growth hormone of number of chondrocytes containing IGF-I in rat growth plate (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-01
    Description: Whether growth hormone stimulates longitudinal bone growth by a direct effect at the site of the growth plate or indirectly by increasing the concentration of circulating somatomedins (insulin-like growth factors) has been the subject of controversy. Immunohistochemical methods were used to explore the localization and distribution of insulin-like growth factor I (IGF-I) immunoreactivity in the epiphyseal growth plate of the proximal tibia of male rats. Cells in the proliferative zone of the growth plate of normal rats exhibited a bright immunofluorescence, whereas cells in the germinal and hypertrophic zones stained only weakly. In rats subjected to hypophysectomy, the number of fluorescent cells was markedly reduced. When the hypophysectomized rats were treated with growth hormone, either systemically or at the site of the growth plate, the number of IGF-I-immunoreactive cells in the proliferative zone was increased. The results show that IGF-I is produced in proliferative chondrocytes in the growth plate and that the number of IGF-I-containing cells is directly regulated by growth hormone. These findings suggest that IGF-I has a specific role in the clonal expansion of differentiated chondrocytes and exerts its function locally through autocrine or paracrine mechanisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nilsson, A -- Isgaard, J -- Lindahl, A -- Dahlstrom, A -- Skottner, A -- Isaksson, O G -- New York, N.Y. -- Science. 1986 Aug 1;233(4763):571-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3523759" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fluorescent Antibody Technique ; Growth Hormone/pharmacology/*physiology ; Growth Plate/*cytology/drug effects/growth & development ; Hypophysectomy ; Insulin-Like Growth Factor I/pharmacology/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Somatomedins/*physiology ; Tibia
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  • 81
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    The neurobiology of learning and memory (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-29
    Description: Study of the neurobiology of learning and memory is in a most exciting phase. Behavioral studies in animals are characterizing the categories and properties of learning and memory; essential memory trace circuits in the brain are being defined and localized in mammalian models; work on human memory and the brain is identifying neuronal systems involved in memory; the neuronal, neurochemical, molecular, and biophysical substrates of memory are beginning to be understood in both invertebrate and vertebrate systems; and theoretical and mathematical analysis of basic associative learning and of neuronal networks in proceeding apace. Likely applications of this new understanding of the neural bases of learning and memory range from education to the treatment of learning disabilities to the design of new artificial intelligence systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thompson, R F -- New York, N.Y. -- Science. 1986 Aug 29;233(4767):941-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3738519" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aplysia/physiology ; Brain/physiology ; Cerebellum/physiology ; Cerebral Cortex/physiology ; Conditioning, Classical/physiology ; Hippocampus/physiology ; Humans ; Learning/*physiology ; Memory/*physiology ; Neural Pathways/physiology ; Neurons/physiology ; Primates ; Rats ; Synapses/physiology
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  • 82
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    CD8+ lymphocytes can control HIV infection in vitro by suppressing virus replication (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-12-19
    Description: Lymphocytes bearing the CD8 marker were shown to suppress replication of human immunodeficiency virus (HIV) in peripheral blood mononuclear cells. The effect was dose-dependent and most apparent with autologous lymphocytes; it did not appear to be mediated by a cytotoxic response. This suppression of HIV replication could be demonstrated by the addition of CD8+ cells at the initiation of virus production as well as after several weeks of virus replication by cultured cells. The observations suggest a potential approach to therapy in which autologous CD8 lymphocytes could be administered to individuals to inhibit HIV replication and perhaps progression of disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walker, C M -- Moody, D J -- Stites, D P -- Levy, J A -- New York, N.Y. -- Science. 1986 Dec 19;234(4783):1563-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2431484" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*immunology/therapy ; Antigens, Surface ; Cells, Cultured ; HIV/immunology/*physiology ; Humans ; Male ; RNA-Directed DNA Polymerase/metabolism ; T-Lymphocytes/*immunology ; *Virus Replication
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  • 83
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    Long-term potentiation in dentate gyrus: induction by asynchronous volleys in separate afferents (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-11-21
    Description: Long-term potentiation (LTP), a long-lasting enhancement of synaptic efficacy, is considered a model for learning and memory. In anesthetized rats, activation of dentate granule cells by stimulating either the medial or lateral perforant pathway at frequencies of 100 to 400 Hz produced LTP of the stimulated pathway preferentially at 400 Hz. However, hippocampal pathways do not normally fire at this high rate. Stimuli at 200 Hz were then applied to either the medial or lateral pathway separately, to both pathways simultaneously, or to the two pathways asynchronously so that the composite stimulus applied to the granule cell dendrite was 400 Hz. LTP was produced preferentially in the asynchronous condition. Thus, lower frequency, physiological input volleys arriving asynchronously at medial and lateral synapses can induce LTP by activating a 400-Hz sensitive mechanism capable of integrating spatially separated granule cell inputs. This may reflect how LTP is normally produced in the dentate gyrus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Winson, J -- Dahl, D -- 5-K02-MH00232/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1986 Nov 21;234(4779):985-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775372" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electric Stimulation ; Evoked Potentials ; Hippocampus/*physiology ; Neurons, Afferent/physiology ; Rats
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  • 84
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    Positron emission tomography reveals elevated D2 dopamine receptors in drug-naive schizophrenics (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-12-19
    Description: In postmortem studies of patients with schizophrenia, D2 dopamine receptors in the basal ganglia have been observed to be more numerous than in patients with no history of neurological or psychiatric disease. Because most patients with schizophrenia are treated with neuroleptic drugs that block D2 dopamine receptors in the caudate nucleus, it has been suggested that this increase in the number of receptors is a result of adaptation to these drugs rather than a biochemical abnormality intrinsic to schizophrenia. With positron emission tomography (PET), the D2 dopamine receptor density in the caudate nucleus of living human beings was measured in normal volunteers and in two groups of patients with schizophrenia--one group that had never been treated with neuroleptics and another group that had been treated with these drugs. D2 dopamine receptor densities in the caudate nucleus were higher in both groups of patients than in the normal volunteers. Thus, schizophrenia itself is associated with an increase in brain D2 dopamine receptor density.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wong, D F -- Wagner, H N Jr -- Tune, L E -- Dannals, R F -- Pearlson, G D -- Links, J M -- Tamminga, C A -- Broussolle, E P -- Ravert, H T -- Wilson, A A -- Toung, J K -- Malat, J -- Williams, J A -- O'Tuama, L A -- Snyder, S H -- Kuhar, M J -- Gjedde, A -- 1RO1 53146/PHS HHS/ -- NS15080/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Dec 19;234(4783):1558-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2878495" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Antipsychotic Agents/*therapeutic use ; Caudate Nucleus/*metabolism ; Haloperidol/therapeutic use ; Humans ; Kinetics ; Receptors, Dopamine/*metabolism ; Receptors, Dopamine D2 ; Schizophrenia/drug therapy/*metabolism ; Spiperone/analogs & derivatives/metabolism ; Tomography, Emission-Computed
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  • 85
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    Translocation of protein kinase C activity may mediate hippocampal long-term potentiation (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-02-07
    Description: Protein kinase C activity in rat hippocampal membranes and cytosol was determined 1 minute and 1 hour after induction of the synaptic plasticity of long-term potentiation. At 1 hour after long-term potentiation, but not at 1 minute, protein kinase C activity was increased twofold in membranes and decreased proportionately in cytosol, suggesting translocation of the activity. This time-dependent redistribution of enzyme activity was directly related to the persistence of synaptic plasticity, suggesting a novel mechanism regulating the strength of synaptic transmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Akers, R F -- Lovinger, D M -- Colley, P A -- Linden, D J -- Routtenberg, A -- MH25281/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1986 Feb 7;231(4738):587-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3003904" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/enzymology ; Cytosol/enzymology ; Enzyme Activation ; Hippocampus/*enzymology/physiology ; Male ; Neuronal Plasticity ; Protein Kinase C/metabolism/*physiology ; Rats ; Synaptic Membranes/enzymology ; Synaptic Transmission
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  • 86
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    The brain nucleus locus coeruleus: restricted afferent control of a broad efferent network (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-11-07
    Description: Dense, focal injections of wheat germ agglutinin conjugated-horseradish peroxidase in the locus coeruleus of rats labeled afferent neurons in unexpectedly few brain regions. Major inputs emanate from only two nuclei--the paragigantocellularis and the prepositus hypoglossi, both in the rostral medulla. The dorsal cap of the paraventricular hypothalamic nucleus and the spinal intermediate gray are possible minor afferents to locus coeruleus. Other areas reported to project to locus coeruleus (for example, amygdala, nucleus tractus solitarius, and spinal dorsal horn) did not exhibit consistent retrograde labeling. Anterograde tracing and electrophysiologic experiments confirmed the absence of input to locus coeruleus from these areas, which instead terminate in targets adjacent to locus coeruleus. These findings redefine the anatomic organization of the locus coeruleus, and have implications for hypotheses concerning the functions of this noradrenergic brain nucleus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aston-Jones, G -- Ennis, M -- Pieribone, V A -- Nickell, W T -- Shipley, M T -- NS20643/NS/NINDS NIH HHS/ -- NS22320/NS/NINDS NIH HHS/ -- NS23348/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Nov 7;234(4777):734-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775363" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways ; Animals ; Efferent Pathways ; Electric Stimulation ; Locus Coeruleus/anatomy & histology/*physiology ; Male ; Medulla Oblongata/cytology ; Paraventricular Hypothalamic Nucleus/cytology ; Rats ; Spinal Cord/cytology ; Wheat Germ Agglutinins
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  • 87
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    Tripeptide structure of bursin, a selective B-cell-differentiating hormone of the bursa of fabricius (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-28
    Description: Differentiation of lymphoid precursor cells in a variety of species is induced by polypeptide hormones such as thymopoietin for T cells and bursin for B cells. In the present experiments, bursin isolated from the bursa of Fabricius of chicken was found to induce the phenotypic differentiation of mammalian and avian B precursor cells but not of T precursor cells in vitro. Similarly, bursin increased cyclic guanosine monophosphate in cells of the human B-cell line Daudi but not in cells of the human T-cell line CEM. These inducing properties of bursin are the reverse of the inducing properties of thymopoietin produced by the thymus and are appropriate to a physiological B-cell-inducing hormone. A tripeptide sequence (lysyl-histidyl-glycyl-amide) was determined for bursin and confirmed by synthesizing this proposed structure and demonstrating chemical identity of the natural and synthetic peptides. Similarity of biological action was indicated in induction assays by elevation of cyclic adenosine monophosphate and guanosine monophosphate in Daudi B cells but not in CEM T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Audhya, T -- Kroon, D -- Heavner, G -- Viamontes, G -- Goldstein, G -- New York, N.Y. -- Science. 1986 Feb 28;231(4741):997-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3484838" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*physiology ; Bursa of Fabricius/*physiology ; Cell Line ; Chickens ; Chromatography, High Pressure Liquid ; Chromatography, Thin Layer ; Humans ; Mass Spectrometry ; Oligopeptides/*isolation & purification/pharmacology/physiology ; Rats ; T-Lymphocytes/drug effects
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  • 88
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    Fetal mini-brain in peripheral nerve (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-03-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, B M -- New York, N.Y. -- Science. 1986 Mar 28;231(4745):1505.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3952493" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Brain/cytology/*embryology ; Cell Differentiation ; Nerve Tissue/transplantation ; Peripheral Nerves/*cytology ; Rats
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  • 89
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    Debate about epilepsy: what initiates seizures? (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-11-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, D M -- New York, N.Y. -- Science. 1986 Nov 21;234(4779):938-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3022378" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/physiopathology ; Disease Models, Animal ; Epilepsy/*physiopathology ; Humans ; Kindling, Neurologic ; Neural Inhibition ; Rats ; *Synaptic Transmission
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  • 90
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    Rat resistance to schistosomiasis: platelet-mediated cytotoxicity induced by C-reactive protein (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-01-10
    Description: In rats infected with the parasite Schistosoma mansoni, the concentration of C-reactive protein in the serum increases after the lung stage of infection and is at its highest at the time of terminal worm rejection. The peak of platelet-mediated cytotoxicity induced by infected serum that has been heated (and is free of immunoglobulin E) as well as the time course for the development of platelet cytotoxic activity in infected rats was found to be correlated with the concentration of C-reactive protein. Rat and human platelets treated with homologous serum obtained during an acute phase of inflammation or with purified C-reactive protein were able to kill the immature forms of the worm in vitro. Platelets treated with C-reactive protein were furthermore capable of conferring significant protection against schistosomiasis in transfer experiments. Collectively these data indicate that a system that includes C-reactive protein and platelets participates in the natural resistance of the rat to schistosomal infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bout, D -- Joseph, M -- Pontet, M -- Vorng, H -- Deslee, D -- Capron, A -- New York, N.Y. -- Science. 1986 Jan 10;231(4734):153-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3079916" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Platelets/*drug effects/immunology ; C-Reactive Protein/blood/immunology/*pharmacology ; Cytotoxicity, Immunologic/*drug effects ; Dose-Response Relationship, Drug ; Immunity, Innate/drug effects ; Rats ; Schistosomiasis mansoni/*immunology ; Turpentine/pharmacology
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  • 91
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    Parvalbumin in most gamma-aminobutyric acid-containing neurons of the rat cerebral cortex (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-28
    Description: gamma-Aminobutyric acid (GABA) is one of the major inhibitory neurotransmitters in the central nervous system. In the cerebral cortex, GABA-containing cells represent a subpopulation of interneurons. With semithin frozen sections, it is possible to demonstrate that most GABA neurons in the rat somatosensory cortex contain the calcium-binding protein parvalbumin and that parvalbumin is found virtually only in GABA neurons. Parvalbumin seems to influence the electrical properties and enzymatic machinery to modulate neuronal excitability and activity. The specific role of parvalbumin in GABA-containing cortical cells may be related to controlling the effectiveness of their inhibitory action.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Celio, M R -- New York, N.Y. -- Science. 1986 Feb 28;231(4741):995-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cerebral Cortex/analysis/*cytology ; Electrophysiology ; Male ; Muscle Proteins/*analysis ; Neurons/*analysis/physiology ; Parvalbumins/*analysis ; Rats ; gamma-Aminobutyric Acid/*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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  • 92
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    Maturational changes in cerebral function in infants determined by 18FDG positron emission tomography (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-02-21
    Description: 2-Deoxy-2[18F]fluoro-D-glucose positron emission tomography performed in human infants during development revealed progressive changes in local cerebral glucose utilization. In infants 5 weeks of age and younger, glucose utilization was highest in the sensorimotor cortex, thalamus, midbrain-brainstem, and cerebellar vermis. By 3 months, glucose metabolic activity had increased in the parietal, temporal, and occipital cortices and the basal ganglia, with subsequent increases in frontal and various association regions occurring by 8 months. These functional changes measured with positron emission tomography are in agreement with behavioral, neurophysiological, and anatomical alterations known to occur during infant development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chugani, H T -- Phelps, M E -- 2P50-NS-02808/NS/NINDS NIH HHS/ -- 7ROI-GM-24839/GM/NIGMS NIH HHS/ -- IPOI-NS-15654/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Feb 21;231(4740):840-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945811" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain/growth & development/*physiology/radionuclide imaging ; Brain Stem/metabolism ; Caudate Nucleus/metabolism ; Cerebellum/metabolism ; Cerebral Cortex/metabolism ; Child, Preschool ; Deoxyglucose/analogs & derivatives/metabolism ; Fluorodeoxyglucose F18 ; Humans ; Infant ; Infant, Newborn ; Intellectual Disability/metabolism/radionuclide imaging ; Thalamus/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 93
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    Suppression of neurite elongation and growth cone motility by electrical activity (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-06-27
    Description: Electrical activity may regulate a number of neuronal functions in addition to its role in transmitting signals along nerve cells. The hypothesis that electrical activity affects neurite elongation in sprouting neurons was tested by stimulating individual snail neurons isolated in cell culture. The findings demonstrated that growth cone advance, and thus neurite elongation, is reversibly stopped during periods when action potentials are experimentally evoked. A decrease in filopodial number and growth cone area was also observed. Thus, action potentials can mediate the cessation of neurite outgrowth and thereby may influence structure and connectivity within the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohan, C S -- Kater, S B -- HD18577/HD/NICHD NIH HHS/ -- NS15350/NS/NINDS NIH HHS/ -- NS21217/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Jun 27;232(4758):1638-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3715470" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Axons/*physiology ; Cells, Cultured ; Electrophysiology ; Neurons/physiology ; Snails ; 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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  • 94
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    Multiple, distinct forms of bovine and human protein kinase C suggest diversity in cellular signaling pathways (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-22
    Description: A new family of protein kinase C-related genes has been identified in bovine, human, and rat genomes. The alpha-, beta-, and gamma-type protein kinase sequences are highly homologous, include a kinase domain, and potential calcium-binding sites, and they contain interspersed variable regions. The corresponding genes are located on distinct human chromosomes; the possibility of even greater genetic complexity of this gene family is suggested by Northern and Southern hybridization analyses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coussens, L -- Parker, P J -- Rhee, L -- Yang-Feng, T L -- Chen, E -- Waterfield, M D -- Francke, U -- Ullrich, A -- New York, N.Y. -- Science. 1986 Aug 22;233(4766):859-66.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3755548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cattle ; Chromosome Mapping ; Chromosomes, Human, 16-18 ; Dna ; Genes ; Humans ; Nucleic Acid Hybridization ; Protein Kinase C/*genetics ; Rats
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 95
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    Youth suicide (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1986 Oct 10;234(4773):127.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3749895" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Child Abuse ; Depression ; Humans ; Sex Offenses ; *Suicide
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 96
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    Obesity, overeating, and rapid gastric emptying in rats with ventromedial hypothalamic lesions (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-02-07
    Description: Measurements confirm the quantitative theoretical prediction that the autonomic nonendocrine abnormality of rapid daytime gastric emptying is the major primary cause of the obesity resulting from ventromedial hypothalamic lesions in rats. Therapy for obesity could include slowing of stomach emptying.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duggan, J P -- Booth, D A -- New York, N.Y. -- Science. 1986 Feb 7;231(4738):609-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3511527" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Feeding and Eating Disorders/*physiopathology ; *Gastric Emptying/drug effects ; Humans ; Hyperphagia/etiology/*physiopathology ; Insulin/pharmacology ; Obesity/etiology/*physiopathology ; Rats ; Rats, Inbred Strains ; Time Factors ; Ventromedial Hypothalamic Nucleus/*physiology
    Print ISSN: 0036-8075
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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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    Lactate transporter defect: a new disease of muscle (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-12-05
    Description: New methods were used to identify the abnormality in a patient who showed evidence of neuromuscular dysfunction on extensive clinical examination. The methods revealed that the lactate content of the patient's skeletal muscle does not decline normally after exercise and that his red cells are defective in lactate transport. These results suggest that skeletal muscle and erythrocyte membranes share the same genetic lactate transporter (or a common subunit), which is deficient in this patient. This defect may be a common cause of elevated serum creatine kinase levels, as seen in the patient described here and of unexplained episodes of rhabdomyolysis and myoglobinuria.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fishbein, W N -- New York, N.Y. -- Science. 1986 Dec 5;234(4781):1254-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775384" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Carrier Proteins/*metabolism ; Creatine Kinase/blood ; Erythrocyte Membrane/metabolism ; Erythrocytes/analysis ; Humans ; Lactates/blood/*metabolism ; Male ; Monocarboxylic Acid Transporters ; Muscular Diseases/*metabolism ; Physical Exertion
    Print ISSN: 0036-8075
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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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    The role of mononuclear phagocytes in HTLV-III/LAV infection (1986)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1986-07-11
    Description: Cells with properties characteristic of mononuclear phagocytes were evaluated for infectivity with five different isolates of the AIDS virus, HTLV-III/LAV. Mononuclear phagocytes cultured from brain and lung tissues of AIDS patients harbored the virus. In vitro-infected macrophages from the peripheral blood, bone marrow, or cord blood of healthy donors produced large quantities of virus. Virus production persisted for at least 40 days and was not dependent on host cell proliferation. Giant multinucleated cells were frequently observed in the macrophage cultures and numerous virus particles, often located within vacuole-like structures, were present in infected cells. The different virus isolates were compared for their ability to infect macrophages and T cells. Isolates from lung- and brain-derived macrophages had a significantly higher ability to infect macrophages than T cells. In contrast, the prototype HTLV-III beta showed a 10,000-fold lower ability to infect macrophages than T cells and virus production was one-tenth that in macrophage cultures infected with other isolates, indicating that a particular variant of HTLV-III/LAV may have a preferential tropism for macrophages or T cells. These results suggest that mononuclear phagocytes may serve as primary targets for infection and agents for virus dissemination and that these virus-infected cells may play a role in the pathogenesis of the disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gartner, S -- Markovits, P -- Markovitz, D M -- Kaplan, M H -- Gallo, R C -- Popovic, M -- New York, N.Y. -- Science. 1986 Jul 11;233(4760):215-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3014648" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*immunology ; Brain/cytology ; Cells, Cultured ; Child ; DNA, Viral/genetics ; Deltaretrovirus/isolation & purification ; Humans ; Lung/cytology ; Macrophages/physiology ; Nucleic Acid Hybridization ; Phagocytes/*physiology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    Stimulation of neuronal acetylcholine receptors induces rapid gene transcription (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-10-03
    Description: Cholinergic agonists rapidly and transiently induced transcription of the c-fos protooncogene and one or more actin genes in neuronally differentiated PC12 cells. Transcription was activated within minutes after stimulation of the nicotinic acetylcholine receptor and required an influx of extracellular Ca2+ ions through voltage-sensitive calcium channels. Nicotine activation proceeded by a different pathway from activation by nerve growth factor, whose stimulation of these genes is independent of extracellular Ca2+ ions. These findings suggest that neurotransmitters may rapidly activate specific gene transcription in nondividing neuronally differentiated cells. They also suggest a functional role for neurotransmitter induction of c-fos and actin expression in the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greenberg, M E -- Ziff, E B -- Greene, L A -- GM 30760/GM/NIGMS NIH HHS/ -- NS16036/NS/NINDS NIH HHS/ -- P30 CA 16087/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Oct 3;234(4772):80-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3749894" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Adrenal Gland Neoplasms/metabolism ; Animals ; Calcium/metabolism ; Cell Line ; Dose-Response Relationship, Drug ; Nerve Growth Factors/pharmacology ; Nicotine/pharmacology ; Pheochromocytoma/metabolism ; Rats ; Receptors, Cholinergic/*drug effects ; Transcription, Genetic/*drug effects
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
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    New drug counters alcohol intoxication (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-12-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1986 Dec 5;234(4781):1198-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3775379" target="_blank"〉PubMed〈/a〉
    Keywords: Alcoholic Intoxication/*drug therapy ; Animals ; Azides/*pharmacology/therapeutic use ; Benzodiazepines/*pharmacology/therapeutic use ; Ethanol/*antagonists & inhibitors ; Humans ; Rats
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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