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  • Disease Models, Animal  (20)
  • Rats, Inbred Strains  (18)
  • ASTRONOMY
  • EARTH RESOURCES AND REMOTE SENSING
  • Organic Chemistry
  • Physics
  • American Association for the Advancement of Science (AAAS)  (39)
  • 1980-1984  (39)
  • 1925-1929
  • 1910-1914
  • 1981  (39)
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Verlag/Herausgeber
  • American Association for the Advancement of Science (AAAS)  (39)
  • Wiley-Blackwell  (1.204)
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  • 1980-1984  (39)
  • 1925-1929
  • 1910-1914
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  • 1
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    Phenytoin-induced teratogenesis: a mouse model (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-01-30
    Beschreibung: Malformations associated with the fetal hydantoin syndrome have been reproduced in a mouse model. The occurrence of these defects was correlated with maternal serum concentrations, but not with maternal or fetal genotype or the presence of a seizure disorder.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finnell, R H -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):483-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455686" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Disease Models, Animal ; Epilepsy/drug therapy ; Female ; Mice ; Mice, Neurologic Mutants/physiology ; Phenytoin/*adverse effects ; *Teratogens
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 2
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    Increased intracranial self-stimulation in rats after long-term administration of desipramine (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-06
    Beschreibung: The effects of long- and short-term administration of the tricyclic antidepressant desipramine on intracranial self-stimulation in rats were studied with electrodes in the A10 region of the dopamine-containing cell bodies of the ventromedial tegmentum. Long-term desipramine administration resulted in a significant shift to the left in the ascending portion of the rate--current intensity function, indicating that the activity of the mesolimbic dopamine system was enhanced. These findings point to a possible dopaminergic mechanism of action of antidepressants and support speculations concerning the role of dopamine-containing neurons in the pathophysiology of depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fibiger, H C -- Phillips, A G -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):683-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7197394" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Depression/physiopathology ; Desipramine/*administration & dosage ; Dopamine/*physiology ; Humans ; Limbic System/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Self Stimulation/*drug effects ; Time Factors
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 3
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    Dietary restriction retards the age-associated loss of rat striatal dopaminergic receptors (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-30
    Beschreibung: In male Wistar rats subjected to dietary restriction by alternate days of feeding and fasting the normal age-associated loss of striatal dopamine receptors in the brain was substantially retarded. The mean survival time of the rats on the restricted diet was increased by approximately 40 percent compared to control rats given free access to food. Dopamine receptor concentrations in striata of 24-month-old rats that had been on a restricted diet since weaning were 50 percent higher than those of control animals of the same age, and essentially comparable to 3- and 6-month-old control rats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levin, P -- Janda, J K -- Joseph, J A -- Ingram, D K -- Roth, G S -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):561-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291993" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Aging ; Animals ; Corpus Striatum/*metabolism ; *Diet ; Fasting ; Rats ; Rats, Inbred Strains ; Receptors, Dopamine/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 4
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    Modulation of parallel fiber excitability by postsynaptically mediated changes in extracellular potassium (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-16
    Beschreibung: Field potentials and extracellular potassium concentration ([K+]o) were simultaneously monitored in the molecular layer of the rat cerebellar cortex during stimulation of the parallel fibers. The synaptic field potential elicited by stimulation was reduced by several methods. Reduction of synaptic field potentials was accompanied by a marked increase in the excitability of the parallel fibers. This change in excitability was related to the degree of extracellular K+ accumulation associated with parallel fiber stimulation. These findings support the proposal that increases in [K+]o associated with activity in postsynaptic elements can modulate the excitability of presynaptic afferent fibers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Malenka, R C -- Kocsis, J D -- Ransom, B R -- Waxman, S G -- NS 15589/NS/NINDS NIH HHS/ -- NS-00473/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 16;214(4518):339-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280695" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Afferent Pathways/*physiology ; Animals ; Calcium/physiology ; Cerebellar Cortex/*physiology ; Evoked Potentials ; Extracellular Space/physiology ; Male ; Manganese/pharmacology ; Membrane Potentials ; Potassium/*physiology ; Rats ; Rats, Inbred Strains ; Synapses/*physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 5
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    Electroconvulsive shock increases tyrosine hydroxylase activity in the brain and adrenal gland of the rat (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-06
    Beschreibung: A single application of electroconvulsive shock produced a rapid but short-lasting increase in tyrosine hydroxylase activity above control values in the rat adrenal medulla and striatum. After repeated electroconvulsive shock treatment (once per day for 7 days), tyrosine hydroxylase activity increased significantly in the locus ceruleus, nucleus of the tractus solitarius, hippocampus, cerebellum, and frontal cortex and remained elevated for 4 to 8 days. Adrenal tyrosine hydroxylase activity increased 1 day after the termination of repeated electroconvulsive shock treatments and remained elevated for at least 24 days, possibly reflecting the establishment of a new and higher steady-state level of catecholamine biosynthesis in the adrenal. These findings suggest that the persistent changes in tyrosine hydroxylase activity produced by repeated electroconvulsive shock may be a factor contributing to the long-lasting antidepressant effects of this treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masserano, J M -- Takimoto, G S -- Weiner, N -- NS 07927/NS/NINDS NIH HHS/ -- NS 09199/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):662-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117127" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenal Glands/*enzymology ; Animals ; Brain/*enzymology ; Corpus Striatum/enzymology ; *Electroshock ; Enzyme Induction ; Locus Coeruleus/enzymology ; Male ; Rats ; Rats, Inbred Strains ; Time Factors ; Tyrosine 3-Monooxygenase/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 6
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    Functional restoration of vision in the cat after long-term monocular deprivation (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-09-04
    Beschreibung: Recovery of visual acuity was studied in six long-term monocularly deprived cats after removal of the nondeprived eye or reverse lid suture. Although both manipulations improved visual acuity, removal of the nondeprived eye was associated with more rapid recovery and higher find acuity than in reverse suture. These results are in agreement with the known electrophysiological effects of these recovery conditions and are also similar to the effects of reverse occlusion or loss of the nonamblyopic eye in human amblyopes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, D C -- EYO 7005/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1137-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268422" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Age Factors ; Amblyopia/physiopathology ; Animals ; Cats ; Disease Models, Animal ; Form Perception/physiology ; Visual Acuity ; Visual Cortex/growth & development/*physiology ; Visual Perception/*physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 7
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    Carcinogen testing: current problems and new approaches (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-23
    Beschreibung: The classic procedures for testing potential carcinogens in animals have basically not changed in the past 50 years. Considerable knowledge of the mechanisms of carcinogenesis has accrued in the last 20 years, particularly concepts on the metabolic activation of chemicals to reactive electrophilic compounds that can interact with nucleophilic including DNA. These developments, in turn, have yielded a framework for integrating into carcinogen testing the determination of genetic effects of chemicals. A systematic decision point approach to carcinogen testing has been developed which entails a sequential decision-making process as specific tests are performed and evaluated prior to initiation of higher order, more complex tests. Compared to conventional bioassays in rodents, this approach provides knowledge based on mechanisms of carcinogenesis, yields a substantial amount of data at minimal cost, and forms a solid base for eventual heath risk assessment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weisburger, J H -- Williams, G M -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):401-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291981" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Assay ; *Carcinogens ; Disease Models, Animal ; *Drug Evaluation, Preclinical ; Mutagenicity Tests ; Mutagens ; Neoplasms, Experimental/*etiology ; Research Design
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 8
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    Drug discrimination learning in lead-exposed rats (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-05-01
    Beschreibung: Lead acetate (0.02 or 0.5 percent) was administered to dams throughout the lactation period with half of the litters continuing on lead after weaning. Drug thresholds for d-amphetamine were determined by using the drug-discrimination learning paradigm. All the offspring that had been exposed to lead were less sensitive to the stimulus properties of d-amphetamine irrespective of whether or not they had continued on lead after weaning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zenick, H -- Goldsmith, M -- New York, N.Y. -- Science. 1981 May 1;212(4494):569-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209554" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Behavior, Animal/drug effects ; Dextroamphetamine/*pharmacology ; Discrimination Learning/*physiology ; Disease Models, Animal ; Female ; Fetus/drug effects ; Lead Poisoning/*physiopathology ; Male ; Pregnancy ; Rats
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 9
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    Endogenous opiates and stress-induced eating (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-12-04
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Antelman, S M -- Rowland, N -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1149-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302588" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Animals ; Endorphins/*physiology ; Feeding Behavior/drug effects/*physiology ; Humans ; Naloxone/pharmacology ; Rats ; Rats, Inbred Strains ; Stress, Psychological/*physiopathology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 10
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    Reduction in oocyte number following prenatal exposure to a diet high in galactose (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-12-04
    Beschreibung: When pregnant rats were fed a 50 percent galactose diet there was a striking reduction in oocyte number in the offspring. The most prominent effects were noted after exposure to galactose during the premeiotic stages of oogenesis. Prenatal exposure to galactose or its metabolites may contribute to the premature ovarian failure characteristic of human galactosemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Y T -- Mattison, D R -- Feigenbaum, L -- Fukui, H -- Schulman, J D -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1145-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302587" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Dietary Carbohydrates/*physiology ; Female ; Fetus/drug effects/physiology ; Galactose/*pharmacology ; Maternal-Fetal Exchange ; Oocytes/drug effects/*physiology ; Ovum/*physiology ; Pregnancy ; Rats ; Rats, Inbred Strains
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 11
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    Tyrosine increases blood pressure in hypotensive rats (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-05-01
    Beschreibung: Administration of tyrosine, the amino acid precursor of catecholamines, increased blood pressure 38 to 49 percent in rats made acutely hypotensive by hemorrhage; other large neutral amino acids were ineffective. Tyrosine's effect was abolished by adrenalectomy, suggesting that, in hypotensive animals, it acts by accelerating the peripheral synthesis and release of catecholamines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Conlay, L A -- Maher, T J -- Wurtman, R J -- AM-14228/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 May 1;212(4494):559-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209553" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenalectomy ; Animals ; Blood Pressure/*drug effects ; Catecholamines/metabolism ; Disease Models, Animal ; Hypotension/*drug therapy/physiopathology ; Male ; Rats ; Tyrosine/*pharmacology/therapeutic use
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 12
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    Behavioral effects of lead and Toxocara canis in mice (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-09-04
    Beschreibung: Adult mice were administered the common parasite Toxocara canis or lead or both. The parasite clearly altered mouse performance on tests of exploration, activity, learning, and motor coordination; behavioral effects in mice receiving lead alone were less general. Consequence of Toxocara administration appeared attenuated in animals receiving both agents. Parasite larvae were found in the central nervous system in all infected mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dolinsky, Z S -- Burright, R G -- Donovick, P J -- Glickman, L T -- Babish, J -- Summers, B -- Cypess, R H -- 08-K4AI00301A-03/AI/NIAID NIH HHS/ -- 08R1AI1478A-03/AI/NIAID NIH HHS/ -- 5S07RR0749-04/RR/NCRR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1142-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268424" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Ascariasis/*complications ; Behavior, Animal/*physiology ; Brain/parasitology ; Disease Models, Animal ; Lead Poisoning/*complications/physiopathology ; Male ; Mice ; Toxocariasis/*complications/physiopathology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 13
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    Opiate antagonist improves neurologic recovery after spinal injury (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-01-30
    Beschreibung: The opiate antagonist naloxone has been used to treat cats subjected to cervical spinal trauma. In contrast to saline-treated controls, naloxone treatment significantly improved the hypotension observed after cervical spinal injury. More critically, naloxone therapy significantly improved neurologic recovery. These findings implicate endorphins in the pathophysiology of spinal cord injury and indicate that narcotic antagonists may have a therapeutic role in this condition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Faden, A I -- Jacobs, T P -- Holaday, J W -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):493-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455690" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood Pressure/*drug effects ; Cats ; Disease Models, Animal ; Endorphins/antagonists & inhibitors ; Naloxone/pharmacology/*therapeutic use ; Spinal Cord/blood supply ; Spinal Cord Injuries/*drug therapy/physiopathology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 14
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    Detection of circulating metallothionein in rats injected with zinc or cadmium (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-13
    Beschreibung: Circulating metallothionein was measured by radioimmunoassay over a 13-day period in male Sprague-Dawley rats that received a sequence of three intraperitoneal injections (at 3-day intervals) of either 5 milligrams of zinc or 0.8 milligrams of cadmium per kilogram of body weight. These amounts of zinc and cadmium produced metallothionein concentrations in the range of 2 to 5 nanograms per milliliter of serum (zinc) and 2 to 15 nanograms per milliliter of serum (cadmium). In control rats given saline injections over the same period the metallothionein concentration ranged from 1 to 3 nanograms per milliliter of serum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garvey, J S -- Chang, C C -- ES 01629/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):805-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292012" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cadmium/*pharmacology ; Dose-Response Relationship, Drug ; Male ; Metalloproteins/*blood ; Metallothionein/*blood/immunology ; Radioimmunoassay ; Rats ; Rats, Inbred Strains ; Zinc/*pharmacology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 15
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    Phototherapy-induced hypocalcemia in newborn rats: prevention by melatonin (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-13
    Beschreibung: When young rats are exposed to white fluorescent light the concentration of calcium in their serum decreases. This effect is prevented by shielding the occiput, by inhibiting corticosterone synthesis, and by exogenous melatonin. Furthermore, the expected hypocalcemic response to cortisol injection is prevented by melatonin. Light-induced hypocalcemia may result from increased calcium uptake by bone when the blocking effect of melatonin decreases after pineal inhibition by transcranial illumination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hakanson, D O -- Bergstrom, W H -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):807-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6895262" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Newborn/*radiation effects ; Disease Models, Animal ; Female ; Humans ; Hydrocortisone/antagonists & inhibitors ; Hypocalcemia/etiology/*prevention & control ; Infant, Newborn ; Jaundice, Neonatal/therapy ; Light ; Male ; Melatonin/*pharmacology ; Phototherapy/adverse effects ; Rats ; Spectrum Analysis ; Time Factors
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 16
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    Brain aging correlates: retardation by hormonal-pharmacological treatments (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-30
    Beschreibung: Mid-aged rats were either adrenalectomized and chronically maintained, or left intact and treated daily for a 9- to 10-month period with a potent analog of the peptide adrenocorticotropin (residues 4 to 9), which has some stimulant properties, or with the neural stimulant pentylenetetrazole. All three treatments reduced hippocampal morphologic correlates of brain aging (neuronal loss, glial reactivity). The pentylenetetrazole and peptide treatments also improved reversal learning. These results suggest that certain endogenous peptides, with stimulant properties, may also exert long-term, trophic effects on brain structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landfield, P W -- Baskin, R K -- Pitler, T A -- AG 01552/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):581-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6270791" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenalectomy ; Adrenocorticotropic Hormone/*pharmacology ; *Aging ; Animals ; Brain/*physiology ; Hippocampus/cytology/physiology ; Learning/physiology ; Pentylenetetrazole/*pharmacology ; Peptide Fragments/*pharmacology ; Rats ; Rats, Inbred Strains
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 17
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    Tetrahydrobiopterin in striatum: localization in dopamine nerve terminals and role in catecholamine synthesis (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-20
    Beschreibung: The hydroxylase cofactor, tetrahydrobiopterin, and its biosynthetic system are localized in dopaminergic nerve terminals in the striatum. This conclusion is based on the nearly equivalent loss of tyrosine hydroxylase and tetrahydrobiopterin and its initial biosynthetic enzyme, guanosine triphosphate cyclohydrolase, after injection of 6-hydroxydopamine into the substantia nigra. The role of the hydroxylase cofactor in the regulation of dopamine synthesis is reassessed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, R A -- Miller, L P -- Lovenberg, W -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):919-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117945" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aminohydrolases/*metabolism ; Animals ; Biopterin/analogs & derivatives/*metabolism ; Corpus Striatum/drug effects/*metabolism ; Dopamine/*metabolism ; GTP Cyclohydrolase/*metabolism ; Hydroxydopamines/pharmacology ; Male ; Pteridines/*metabolism ; Rats ; Rats, Inbred Strains ; Substantia Nigra/drug effects/metabolism ; Tyrosine 3-Monooxygenase/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 18
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    Dopamine receptor binding is increased in diabetic rats (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-27
    Beschreibung: The binding of [3H]spiperone, a dopamine receptor ligand, to striatal membranes was increased 30 to 35 percent in rats made diabetic with alloxan or streptozotocin. Binding of [3H]spiperone was normal in rats made diabetic with alloxan but treated with insulin. Thus the number of dopamine receptors and central dopaminergic transmission may be altered in diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lozovsky, D -- Saller, C F -- Kopin, I J -- New York, N.Y. -- Science. 1981 Nov 27;214(4524):1031-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6458088" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alloxan/pharmacology ; Animals ; Blood Glucose/metabolism ; Cell Membrane/metabolism ; Corpus Striatum/*metabolism ; Diabetes Mellitus, Experimental/drug therapy/*metabolism ; Insulin/therapeutic use ; Kinetics ; Male ; Rats ; Rats, Inbred Strains ; Receptors, Dopamine/drug effects/*metabolism ; Spiperone/metabolism ; Streptozocin/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 19
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    Hypothyroidism elicits electrophysiological noradrenergic subsensitivity in rat cerebellum (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-06
    Beschreibung: discharge rats of Purkinje neurons were compared in control and hypothyroid adult rats. Purkinje neurons in hypothyroid rats fired significantly faster and were less sensitive to iontophoretically applied norepinephrine than those in control rats. The subsensitivity of the Purkinje neurons appeared to be primarily due to an alteration in the beta-receptor--adenylate cyclase complex, because the sensitivity of these cells to locally applied N6-monobutyryl adenosine 3'-5'-monophosphate (N6 cyclic AMP) did not change significantly. The sensitivity of the Purkinje neurons to norepinephrine could be restored in hypothyroid rats by administration of triiodothyronine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marwaha, J -- Prasad, K N -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):675-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6270792" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Action Potentials/drug effects ; Adenylyl Cyclases/metabolism ; Adrenergic Fibers/*physiopathology ; Animals ; Cerebellum/*physiopathology ; Cyclic AMP/metabolism ; Hypothyroidism/*physiopathology ; Male ; Norepinephrine/*physiology ; Purkinje Fibers/physiopathology ; Rats ; Rats, Inbred Strains ; Receptors, Adrenergic/*physiology ; Receptors, Adrenergic, beta/*physiology ; Triiodothyronine/*pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 20
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    Assessment of pharmacological treatment of myocardial infarction by phosphorus-31 NMR with surface coils (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-01-09
    Beschreibung: Phosphorus-31 nuclear magnetic resonance (NMR) measurements with small surface coils have been used to observe phosphorus metabolism of perfused hearts within localized regions. The method allows for direct, noninvasive, sequential assessment of the altered regional metabolism resulting from myocardial infarction and its response to drug treatment, which cannot be observed by conventional techniques.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nunnally, R L -- Bottomley, P A -- GM 17172/GM/NIGMS NIH HHS/ -- HL 17655-06/HL/NHLBI NIH HHS/ -- HL 22080/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 9;211(4478):177-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444460" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Chlorpromazine/therapeutic use ; Coronary Circulation/drug effects ; Disease Models, Animal ; Magnetic Resonance Spectroscopy/*methods ; Myocardial Infarction/*diagnosis/drug therapy/metabolism ; Phosphorus/*metabolism ; Phosphorus Isotopes ; Rabbits ; Verapamil/therapeutic use
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 21
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    Hyperkeratosis induced by sunlight degradation products of the major polybrominated biphenyl in Firemaster (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-08-21
    Beschreibung: Sunlight photodegradation of 2,2', 4,4', 5,5' -hexabromobiphenyl, the major component of Firemaster, gave a mixture that produces severe hyperkeratosis of the rabbit ear. This component in its pure state does not cause hyperkeratosis. One or more of the four major photolysis products must be responsible for this activity. A similar photodegradation pattern was observed for 2,2', 3,4,4', 5,5' -heptabromobiphenyl, the second largest component of Firemaster.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patterson, D G -- Hill, R H -- Needham, L L -- Orti, D L -- Kimbrough, R D -- Liddle, J A -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):901-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6266016" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Biphenyl Compounds/radiation effects ; Chemical Industry ; Disease Models, Animal ; Environmental Exposure ; Keratosis/*chemically induced ; Michigan ; Photochemistry ; *Polybrominated Biphenyls/radiation effects ; Rabbits ; Sunlight
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 22
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    DNA synthesis in cultured adult cardiocytes (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-30
    Beschreibung: Trypsin-dissociated atrial cardiocytes from adult rats were exposed to [3H]thymidine for sequential 24-hour periods from day 2 to day 12 of culture. On day 3 and each day thereafter, cells were prepared for ultrastructural radioautography and examined with an electron microscope. Maximal incorporation occurred on day 5, when 63 percent of the cardiocytes were labeled. Mitotic activity was never present in more than 0.5 percent of the cardiocytes examined. Incorporation of [3H]thymidine and mitosis occurred only in immature cardiocytes characterized by subsarcolemmal primary filaments and Z bands with or without specific granules; more mature cardiocytes were never labeled.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cantin, M -- Ballak, M -- Beuzeron-Mangina, J -- Anand-Srivastava, M B -- Tautu, C -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):569-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291996" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Autoradiography ; Cell Division ; Cells, Cultured ; DNA/*biosynthesis ; Female ; Mitosis ; Myocardium/*cytology ; Rats ; Rats, Inbred Strains ; Time Factors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 23
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    Neuroleptic drug-induced dopamine receptor supersensitivity: antagonism by L-prolyl-L-leucyl-glycinamide (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-12-11
    Beschreibung: An animal model of tardive dyskinesia was used to evaluate the potential antidyskinetic properties of the neuropeptide L-prolyl-L-leucyl-glycinamide (PLG). In rats, PLG administered concurrently with the neuroleptic drug haloperidol or chlorpromazine antagonized the enhancement of specific [3H]spiroperidol binding in the striatum that is associated with long-term neuroleptic treatment. The results are discussed in relation to a possible functional coupling of the putative PLG receptor with neuroleptic-dopamine receptor complex and clinical implications for tardive dyskinesia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chiu, S -- Paulose, C S -- Mishra, R K -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1261-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117947" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Butyrophenones/*metabolism ; Chlorpromazine/*pharmacology ; Corpus Striatum/*metabolism ; Haloperidol/*pharmacology ; Kinetics ; MSH Release-Inhibiting Hormone/*pharmacology ; Male ; Rats ; Rats, Inbred Strains ; Receptors, Dopamine/drug effects/*metabolism ; Spiperone/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 24
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    Giant synaptic potential hypothesis for epileptiform activity (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-01-16
    Beschreibung: According to one hypothesis, the paroxysmal depolarizing shift observed in the penicillin model of epilepsy results from a giant excitatory postsynaptic potential. This hypothesis has recently been questioned, primarily because it has never been subjected to rigorous experimental examination. Four quantitative predictions were derived from this hypothesis and tested in CA3 pyramidal neurons of the hippocampus. The four critical predictions concern the behavior of the paroxysmal depolarizing shift under current- and voltage-clamp conditions as a function of membrane potential. The experiments confirmed all four predictions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnston, D -- Brown, T H -- NS11535/NS/NINDS NIH HHS/ -- NS15772/NS/NINDS NIH HHS/ -- RR-05471-17/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 16;211(4479):294-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444469" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Action Potentials ; Animals ; Disease Models, Animal ; Electric Conductivity ; Epilepsy/*physiopathology ; Guinea Pigs ; Hippocampus/*physiopathology ; In Vitro Techniques ; Membrane Potentials ; Penicillin G ; Synaptic Membranes/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 25
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    Rapid correction of hyponatremia causes demyelination: relation to central pontine myelinolysis (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-03-06
    Beschreibung: The human demyelinative disorder central pontine myelinolysis may be an iatrogenic disease caused by a rapid rise in serum sodium, usually when hyponatremia is corrected. Rats treated with hypertonic saline after 3 days of vasopressin-induced hyponatremia had demyelinative lesions in the corpus striatum, lateral hemispheric white matter, cerebral cortex, hippocampal fimbria, anterior commissure, thalamus, brainstem tegmentum, and cerebellum. Thus, rapid correction of hyponatremia can lead to demyelinative lesions and may be the cause of central pontine myelinolysis in man.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleinschmidt-DeMasters, B K -- Norenberg, M D -- New York, N.Y. -- Science. 1981 Mar 6;211(4486):1068-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466381" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood-Brain Barrier ; Brain Diseases/*etiology ; Demyelinating Diseases/*etiology/pathology ; Disease Models, Animal ; Hyponatremia/*complications ; Male ; Pons/*pathology ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 26
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    Cerebral cortex responds rapidly to thyroid hormones (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-30
    Beschreibung: In rats subjected to thyroidectomy there was a two- to fourfold increase in cerebral cortex iodothyronine 5'-deiodinase activity within 24 hours. This increase was prevented by thyroxine replacement. The increased cortical 5'-deiodinase in chronically hypothyroid rats was normalized within 4 hours by a single intravenous injection of triiodothyronine. These results indicate that the adult central nervous system can give a very rapid biochemical response to thyroid hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leonard, J L -- Kaplan, M M -- Visser, T J -- Silva, J E -- Larsen, P R -- AM00727/AM/NIADDK NIH HHS/ -- AM18616/AM/NIADDK NIH HHS/ -- AM25340/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):571-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291997" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cerebral Cortex/*enzymology ; Iodide Peroxidase/*metabolism ; Liver/metabolism ; Male ; Peroxidases/*metabolism ; Rats ; Rats, Inbred Strains ; Thyroidectomy ; Thyroxine/*metabolism ; Time Factors ; Triiodothyronine/*metabolism ; Triiodothyronine, Reverse/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 27
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    Structural correlates of seizure behavior in the mongolian gerbil (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-08-21
    Beschreibung: Hippocampi of seizure-sensitive and seizure-resistant Mongolian gerbils were examined in search of structural correlates of seizure behavior. In animals with well-established seizure histories, differences were found in both presynaptic and postsynaptic structures. Seizing animals had less dense dendritic spines, a greater proportion of mossy tuft area devoted to presynaptic vesicles, and a smaller proportion devoted to spines. The possible relationship of these findings to epilepsy is discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, L A -- Fried, I -- Watanabe, K -- Forsythe, A B -- Scheibel, A B -- 5-507-RR05756-06/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):924-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256289" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Disease Models, Animal ; Gerbillinae/*anatomy & histology/physiology ; Hippocampus/*anatomy & histology/ultrastructure ; Microscopy, Electron ; Seizures/pathology/*physiopathology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 28
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    Intraventricular calcitonin inhibits gastric acid secretion (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-06
    Beschreibung: Parenteral and intracerebroventricular administration of calcitonin in rats resulted in the suppression of gastric acid secretion. This suppression also occurred in rats with insulin-induced hypoglycemia and after the administration of thyrotropin-releasing hormone. Intracerebroventricularly administered calcitonin was 1000 times more effective than parenterally administered calcitonin in suppressing gastric acid secretion. Calcitonin also inhibited the development of stress-induced ulcers in rats.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morley, J E -- Levine, A S -- Silvis, S E -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):671-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292006" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/*drug effects ; Calcitonin/administration & dosage/*pharmacology ; Gastric Juice/*secretion ; Injections, Intraventricular ; Male ; Peptic Ulcer/etiology ; Rats ; Rats, Inbred Strains ; Stress, Physiological/complications
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 29
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    Spontaneous diabetes in rats: destruction of islets is prevented by immunological tolerance (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-09-18
    Beschreibung: Spontaneous diabetes occurring in "BB" rats (derived from a colony of outbred Wistar rats) is the result of destruction of pancreatic islets by infiltrating mononuclear cells (insulitis) and may be a disease very similar to human juvenile onset diabetes. Both diseases probably have an autoimmune etiology. Evidence is presented that islets transplanted to diabetic BB rats are destroyed by the original disease process. Inoculation of bone marrow from normal (nondiabetes-susceptible) rat donors into neonatal BB recipients usually prevented the development of hyperglycemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naji, A -- Silvers, W K -- Bellgrau, D -- Barker, C F -- AM19525/AM/NIADDK NIH HHS/ -- AM26007/AM/NIADDK NIH HHS/ -- CA18640/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 18;213(4514):1390-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6791286" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Autoimmune Diseases/*immunology ; Bone Marrow Transplantation ; Diabetes Mellitus, Experimental/*immunology ; Disease Models, Animal ; Graft Rejection ; Immune Tolerance ; Islets of Langerhans/*immunology ; Islets of Langerhans Transplantation ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 30
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    Effect of indomethacin on intestinal tumors induced in rats by the acetate derivative of dimethylnitrosamine (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-30
    Beschreibung: Over the course of 20 weeks, Sprague-Dawley rats developed intestinal tumors in response to an intraperitoneal injection of the acetate derivative of dimethylnitrosamine. The same agent did not induce tumors in Lobund-Wistar rats. The number of tumors was significantly smaller in rats given drinking water containing indomethacin (beginning 14 days after the injections) than in control rats given drug-free water.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pollard, M -- Luckert, P H -- CA 00295/CA/NCI NIH HHS/ -- CA 15957/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 30;214(4520):558-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291992" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Dimethylnitrosamine/*analogs & derivatives/antagonists & inhibitors ; Indomethacin/*pharmacology ; Intestinal Neoplasms/*chemically induced ; Male ; Neoplasms, Experimental/chemically induced ; Rats ; Rats, Inbred Strains ; Species Specificity
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 31
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    Tyrosine administration decreases vulnerability to ventricular fibrillation in the normal canine heart (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-02-13
    Beschreibung: Intravenous infusion of tyrosine (1, 2, or 4 milligrams per kilogram) for 20 to 30 minutes caused dose-dependent increases in the ventricular fibrillation threshold in normal dogs. Administration of valine, a neutral amino acid that competes with tyrosine for uptake at the blood-brain barrier, in a dose equimolar to the most effective dose of tyrosine, slightly decreased the ventricular fibrillation threshold when given alone and significantly blocked elevation of the ventricular fibrillation threshold after tyrosine infusion. Hence, tyrosine, presumably acting in the central nervous system, can protect against certain ventricular arrhythmias.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scott, N A -- DeSilva, R A -- Lown, B -- Wurtman, R J -- 21384-08/PHS HHS/ -- AM-14228/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 13;211(4483):727-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455710" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood-Brain Barrier ; Catecholamines/metabolism ; Disease Models, Animal ; Dogs ; Tyrosine/antagonists & inhibitors/metabolism/*therapeutic use ; Valine/pharmacology ; Ventricular Fibrillation/*prevention & control
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 32
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    The National Science Foundation looks to the future (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-03-13
    Beschreibung: Great advances have been made in fundamental scientific research in recent years. The new knowledge gathered, in addition to deepening our understanding of the physical universe, contributes a range of abilities and opportunities to society that would not otherwise be available. Much research that may be called applied because it addresses needs of society is quite fundamental in character, and support of such research at the National Science Foundation is to be handled in tandem by the research directorates. Other areas that require a refocusing of support are engineering science and education, at all levels, in science and engineering. Increasing our strength in these areas is essential to achieve our national economic, social, and political goals. Steps are being taken by the National Science Foundation to make its structure better able to deal with engineering and applied research and to provide greater mutual reinforcement between applied and basic research.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slaughter, J B -- New York, N.Y. -- Science. 1981 Mar 13;211(4487):1131-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466384" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Cell Biology ; Chemical Phenomena ; Chemistry ; *Forecasting ; Geological Phenomena ; Geology ; *Government Agencies ; Molecular Biology ; Neurochemistry ; Physical Phenomena ; Physics ; Research Support as Topic ; United States
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 33
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    Fetal alcohol syndrome: embryogenesis in a mouse model (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-11-20
    Beschreibung: When two small doses of ethanol were administered to pregnant mice during the gastrulation stage of embryogenesis, the embryos developed craniofacial malformations closely resembling those seen in the human fetal alcohol syndrome. Striking histological changes appeared in the developing brain (neuroectoderm) within 24 hours of exposure. Decreased development of the neural plate and its derivatives apparently accounts for the craniofacial malformations. The critical exposure period is equivalent to the third week in human pregnancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sulik, K K -- Johnston, M C -- Webb, M A -- DE 02668/DE/NIDCR NIH HHS/ -- DE 05906/DE/NIDCR NIH HHS/ -- RR 05333/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):936-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6795717" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Child ; Disease Models, Animal ; Embryo, Mammalian/*drug effects/ultrastructure ; Ethanol/*pharmacology ; Eye Abnormalities ; Female ; Fetal Alcohol Spectrum Disorders/*physiopathology ; Humans ; Mice ; Mice, Inbred C57BL ; Microscopy, Electron, Scanning ; Pregnancy
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 34
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    Trauma-induced protein in rat tissues: a physiological role for a "heat shock" protein? (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-10-02
    Beschreibung: Hyperthermic shock induces the synthesis of a novel protein (P71) in many rat tissues in vivo. In incubated rat tissue slices P71 is the major protein synthesized even though it is undetectable in the tissues of a normal, unstressed rat. P71 is "heat shock" protein, and it may be induced in vivo by stimuli other than hyperthermia. These results indicate that caution must be used in studies of protein synthesis in tissue explants, since the pattern of proteins synthesized by rat tissue slices is characteristic of stressed tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Currie, R W -- White, F P -- New York, N.Y. -- Science. 1981 Oct 2;214(4516):72-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280681" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Heat-Shock Proteins ; *Hot Temperature ; Isoelectric Point ; Male ; Molecular Weight ; Myocardium/metabolism ; *Protein Biosynthesis ; Rats ; Rats, Inbred Strains ; Stress, Physiological/*metabolism ; Tissue Distribution
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 35
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    Thyrotropin-releasing hormone improves cardiovascular function in experimental endotoxic and hemorrhagic shock (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-07-10
    Beschreibung: Thyrotropin-releasing hormone significantly improved cardiovascular function when it was injected intravenously into conscious rats subjected to experimental endotoxic or hemorrhagic shock. Because thyrotropin-releasing hormone appears to be a "physiologic: opiate antagonist without effects on pain responsiveness, it may provide therapeutic benefits in the treatment of shock or acute hypotension.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holaday, J W -- D'Amato, R J -- Faden, A I -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):216-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6787704" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood Pressure/*drug effects ; Disease Models, Animal ; Endotoxins ; Heart Rate/drug effects ; Male ; Rats ; Shock, Hemorrhagic/*physiopathology ; Shock, Septic/*physiopathology ; Thyrotropin-Releasing Hormone/*pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 36
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    beta-Endorphin: possible involvement in the antihypertensive effect of central alpha-receptor activation (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-01-02
    Beschreibung: Clonidine and L-alpha-methylnoradrenaline (but not D-alpha-methylnoradrenaline) increase the release of a substance with beta-endorphin immunoreactivity from slices of brainstem of spontaneously hypertensive rats, but not that of normotensive rats. It was reported earlier that opiate antagonists inhibit the hypotensive action of clonidine and alpha-methyldopa in spontaneously hypertensive but not in normotensive rats and that beta-endorphin has hypotensive effects of its own. Together, these findings indicate that release of beta-endorphin by central alpha-receptor agonists may contribute to the antihypertensive action of these drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kunos, G -- Farsang, C -- Ramirez-Gonzales, M D -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):82-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6108611" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenergic alpha-Agonists/*pharmacology ; Animals ; Brain Stem/*metabolism ; Clonidine/pharmacology ; Disease Models, Animal ; Endorphins/*metabolism ; Hypertension/*physiopathology ; Immunoassay ; Male ; Naloxone/pharmacology ; Nordefrin/pharmacology ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 37
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    Hyperthermia-induced seizures in the rat pup: a model for febrile convulsions in children (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-08-28
    Beschreibung: Seizures were produced in rat pups by ambient hyperthermia. Seizure threshold temperatures, measured rectally and intracerebrally, increased between 2 and 10 days of age. Electrocortical paroxysmal discharges were confirmed in hyperthermic 6- and 10-day-old pups. The increasing resistance to hyperthermic seizures with maturation and the electroencephalographic changes induced by hyperthermia are similar to those in young children.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holtzman, D -- Obana, K -- Olson, J -- NS 16256/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):1034-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268407" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Age Factors ; Animals ; Brain/physiopathology ; Disease Models, Animal ; Electroencephalography ; Fever/*complications ; Rats ; Seizures/*physiopathology ; Seizures, Febrile/*physiopathology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 38
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    Germplasm conservation (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-12-04
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Russell, E S -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1074, 1076.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6946561" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cats ; Disease Models, Animal ; Dogs ; *Genetic Engineering ; *Genetics, Medical ; Humans ; Mice ; Mutation ; Rats
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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  • 39
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    Intestinal diffusion barrier: unstirred water layer or membrane surface mucous coat? (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 1981-12-11
    Beschreibung: The dimensions of the small intestinal diffusion barrier interposed between luminal nutrients and their membrane receptors were determined from kinetic analysis of substrate hydrolysis by integral surface membrane enzymes. The calculated equivalent thickness of the unstirred water layer was too large to be compatible with the known dimensions of rat intestine. The discrepancy could be reconciled by consideration of the mucous coat overlying the intestinal surface membrane. Integral surface membrane proteins could not be labeled by an iodine-125 probe unless the surface coat was first removed. The mucoprotein surface coat appears to constitute an important diffusion barrier for nutrients seeking their digestive and transport sites on the outer intestinal membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smithson, K W -- Millar, D B -- Jacobs, L R -- Gray, G M -- AM 05418/AM/NIADDK NIH HHS/ -- AM 11270/AM/NIADDK NIH HHS/ -- AM 15802/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1241-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302593" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Membrane/*metabolism ; Diffusion ; Disaccharides/metabolism ; *Intestinal Absorption ; Jejunum/*metabolism/ultrastructure ; Kinetics ; Male ; Microscopy, Electron ; Microvilli/*metabolism/ultrastructure ; Rats ; Rats, Inbred Strains
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
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