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  • Articles  (721)
  • Cells, Cultured  (259)
  • Pregnancy  (192)
  • Kinetics  (182)
  • Genes  (114)
  • American Association for the Advancement of Science (AAAS)  (721)
  • Annual Reviews
  • 1980-1984  (557)
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  • American Association for the Advancement of Science (AAAS)  (721)
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  • 1
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    Sulfhydryl groups and the monodeiodination of thyroxine to triiodothyronine (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-02-24
    Description: Sulfhydryl reagents exert a profound influence on the monodeiodination of thyroxine to triiodothyronine by rat and sheep tissues in vitro. A marked dithiothreitol-induced increase in the monodeiodination by fetal sheep liver homogenates suggests that the characteristically low conversion in fetal tissues is related more to the status of sulfhydryl groups than to a deficiency of the monodeiodinating enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chopra, I J -- New York, N.Y. -- Science. 1978 Feb 24;199(4331):904-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/622575" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dithiothreitol/pharmacology ; Female ; Fetus/*metabolism ; Liver/embryology/*metabolism ; Pregnancy ; Rats ; Sheep ; Sulfhydryl Compounds/*metabolism ; Sulfhydryl Reagents/pharmacology ; Thyroxine/*metabolism ; Triiodothyronine/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Frog perspective on the morphological difference between humans and chimpanzees (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-14
    Description: The body shapes of humans and chimpanzees were compared quantitatively by criteria chosen for their capacity to discriminate well among the body shapes of frogs. By these criteria, the difference in body shape between humans and chimpanzees was found to be greater than that between the most dissimilar pairs of frogs examined--that is, frogs classified in separate taxonomic suborders. Even though the morphological diffference between the two primates is large by frog standards, the biochemical differences between the structural genes of these two species are small. The results of this study give quantitative support to the proposal that morphological evolution and biochemical evolution in structural genes can proceed at independent rates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cherty, L M -- Case, S M -- Wilson, A C -- New York, N.Y. -- Science. 1978 Apr 14;200(4338):209-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635583" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anthropometry ; Anura/*anatomy & histology ; *Biological Evolution ; Biometry ; Genes ; Humans ; Pan troglodytes/*anatomy & histology
    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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  • 3
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    Dieldrin-induced mortality in an endangered species, the gray bat (Myotis grisescens) (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-24
    Description: Brains of juvenile gray bats, Myotis grisescens, found dead beneath maternity roosts in two Missouri caves contained lethal concentrations of dieldrin. One colony appeared to be abnormally small, and more dead bats were found a year after the juvenile bats had been collected. This is the first report to link the field mortality of bats directly to insecticide residues acquired through the food chain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clark, D R Jr -- LaVal, R K -- Swineford, D M -- New York, N.Y. -- Science. 1978 Mar 24;199(4335):1357-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/564550" target="_blank"〉PubMed〈/a〉
    Keywords: Aldrin/adverse effects ; Animals ; Body Weight ; Brain Chemistry ; *Chiroptera ; Dieldrin/*adverse effects/analysis ; Environmental Exposure ; Female ; Lactation ; Male ; Missouri ; Pesticide Residues ; Pregnancy
    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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    Rabies viruses increase in virulence when propagated in neuroblastoma cell culture (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-10
    Description: Several strains of attenuated rabies virus lacking the capacity to kill adult mice acquired a high lethal potential for mice after one to five serial passages in murine or human neuroblastoma cells. The virulence acquired after passage in neuroblastoma cells is a stable genetic trait retained during subsequent passage of viruses in nonneuroblastoma cell systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clark, H F -- New York, N.Y. -- Science. 1978 Mar 10;199(4333):1072-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/628831" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cells, Cultured ; Mice ; Neuroblastoma/*microbiology ; Neurons/microbiology ; Rabies Vaccines/toxicity ; Rabies virus/genetics/*pathogenicity ; Vaccines, Attenuated/toxicity ; Virus Replication
    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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    Murine lymphoma-induced immunosuppression: requirement for direct tumour cell contact (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-07
    Description: The FBL-3 lymphoma cell line caused impaired antibody formation in vivo when injected into mice intraperitoneally, and in vitro when added to normal syngeneic spleen cells immunized in vitro with sheep erythrocytes. Immunosuppression occurred only when intact viable tumor cells were cocultivated with the normal spleen cells. As few as 10(5) FBL-3 cells, when added to 5 X 10(6) normal cells, impaired antibody formation. However, cell-free extracts of filtrates from even much larger numbers of tumor cells did not affect antibody formation, either in vitro or in vivo. Heating the tumor cells at 56 degrees C or irradiation with as little as 1000 rads completely abolished immunosuppressive activity, both in vitro and in vivo. Separation of viable tumor cells from target antibody-forming cells by cell-impermeable membranes prevented immunosuppression, showing that direct cell-to-cell contact is required for immunosuppression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cimprich, R S -- Specter, S -- Friedman, H -- New York, N.Y. -- Science. 1978 Apr 7;200(4337):60-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635572" target="_blank"〉PubMed〈/a〉
    Keywords: *Antibody Formation ; Cell Communication ; Cells, Cultured ; *Immunosuppression ; Lymphoma/*immunology ; Neoplasms, Experimental/immunology
    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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  • 6
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    Hepatitis B virus and sex ratio of offspring (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-08-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Drew, J S -- London, W T -- Lustbader, E D -- Hesser, J E -- Blumberg, B S -- New York, N.Y. -- Science. 1978 Aug 25;201(4357):687-92.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/566954" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Birth Order ; Cross Reactions ; Female ; Fetal Death ; Graft Survival ; Hepatitis B/immunology/*physiopathology/transmission ; Hepatitis B Surface Antigens/analysis ; Humans ; Male ; Parity ; Pregnancy ; Sex Factors ; *Sex Ratio
    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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  • 7
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    The biology of oxygen radicals (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-08
    Description: The reactive superoxide radical, O2-, formerly of concern only to radiation chemists and radiobiologists, is now understood to be a normal product of the biological reduction of molecular oxygen. An unusual family of enzymes, the superoxide dismutases, protect against the deleterious actions of this radical by catalyzing its dismutation to hydrogen peroxide plus oxygen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fridovich, I -- New York, N.Y. -- Science. 1978 Sep 8;201(4359):875-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/210504" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Catalase/metabolism ; Free Radicals ; Inflammation/metabolism ; Kinetics ; Metals ; Oxidation-Reduction ; Oxygen/*metabolism ; Paraquat/pharmacology ; Peroxidases/metabolism ; Superoxide Dismutase/*metabolism ; Superoxides/*metabolism/toxicity
    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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  • 8
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    Estrogen formation in the early rabbit embryo (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-01-13
    Description: Androgen formation (3beta-hydroxysteroid dehydrogenase activity) was detectable in the rabbit blastocyst on day 5 of gestation (before implantation); estrogen formation was first detectable on day 7. The capacity to form estrogen on the day of implantation suggests that estrogen formation in the blastocyst may play a role in the implantation process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉George, F W -- Wilson, J D -- New York, N.Y. -- Science. 1978 Jan 13;199(4325):200-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/579477" target="_blank"〉PubMed〈/a〉
    Keywords: 3-Hydroxysteroid Dehydrogenases/*metabolism ; Androgens/biosynthesis ; Animals ; Blastocyst/*metabolism ; *Embryo Implantation ; Embryonic Development ; Estradiol/*biosynthesis ; Female ; Gestational Age ; Pregnancy ; Rabbits
    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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    beta-Adrenergic receptors in aged rat brain: reduced number and capacity of pineal gland to develop supersensitivity (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-07-07
    Description: The density but not the affinity of beta-adrenergic receptors declined significantly with age in rat pineal gland, corpus striatum, and cerebellum, as determined by the binding of tritiated dihydroalprenolol. Exposing rats to light for 12 hours increased the binding of this radioligand in 3-month-old but not in 24-month-old rats. The reduced responsiveness to catecholamines seen in aging may be due to a decrease in the number of beta-adrenergic receptors which, in turn, may be caused by an impaired capacity of receptors in aged animals to adapt to changes in adrenergic neuronal input.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greenberg, L H -- Weiss, B -- New York, N.Y. -- Science. 1978 Jul 7;201(4350):61-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/208145" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Alprenolol/analogs & derivatives/metabolism ; Animals ; Brain/*metabolism ; Cerebellum/metabolism ; Circadian Rhythm ; Corpus Striatum/metabolism ; Kinetics ; Light ; Male ; Neuroglia/metabolism ; Pineal Gland/*metabolism ; Rats ; Receptors, Adrenergic/*metabolism ; Receptors, Adrenergic, beta/*metabolism
    Print ISSN: 0036-8075
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  • 10
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    Diazepam inhibits myoblast fusion and expression of muscle specific protein synthesis (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-05
    Description: The presence of diazepam in culutres of chicken embryo myoblasts arrests normal muscle cell differentiation. High concentrations of the drug reversibly prevent myoblasts from fusing to form multinucleated myotubes. Lower concentrations of diazepam allow cell fusion to occur, but inhibit the synthesis and accumulation of myosin heavy chain, implying that cell fusion does not obligate myoblasts to synthesize and accumulate large quantities of muscle specific protein. The effect of diazepam on muscle cells in culture is direct and specific.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bandman, E -- Walker, C R -- Strohman, R C -- New York, N.Y. -- Science. 1978 May 5;200(4341):559-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/565534" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation/drug effects ; Cell Fusion/drug effects ; Cells, Cultured ; Chick Embryo ; Diazepam/*pharmacology ; Dose-Response Relationship, Drug ; Macromolecular Substances ; Muscles/cytology/*drug effects ; Myosins/*biosynthesis
    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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    Opiate peptide modulation of amino acid responses suggests novel form of neuronal communication (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-31
    Description: Mouse spinal neurons grown in tissue culture were used to study the electrophysiological pharmacology of the opiate peptide leucine-enkephalin. Enkephalin depressed glutamate-evoked responses in a noncompetitive manner independent of any other effects on membrane properties. The results demonstrate a neuromodulatory action of opiate peptide functionally distinct from the conventional neurotransmitter class of operation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barker, J L -- Neale, J H -- Smith, T G Jr -- Macdonald, R L -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1451-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/204016" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Endorphins/*pharmacology ; Enkephalins/antagonists & inhibitors/*pharmacology ; Excitatory Amino Acid Antagonists ; Glutamates/*pharmacology ; Iontophoresis ; Naloxone/pharmacology ; Neurons/*drug effects ; Spinal Cord ; Synapses/*drug effects ; Synaptic Transmission/*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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  • 12
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    Loss of division potential in vitro: aging or differentiation? (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-12-15
    Description: We have examined the hypothesis that diploid cells grown in vitro age, and propose that only proliferative potential and not life-span is telescoped. We suggest that explanted or transplanted diploid cells are driven to divide by the process of subculturing in vitro or in vivo and, in response to this pressure, also complete their differentiation and become refractory to further mitotic stimulation. We conclude that differentiation rather than "mortality" distinguishes diploid from transformed cells and that the former may not age in vitro, but are lost because culture methods are selective for cycling cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, E -- Marek, L F -- Levinstone, D S -- Merrill, C -- Sher, S -- Young, I T -- Eden, M -- New York, N.Y. -- Science. 1978 Dec 15;202(4373):1158-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/725592" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Cycle ; *Cell Differentiation ; *Cell Division ; *Cell Survival ; Cells, Cultured ; Fibroblasts
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  • 13
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    S-adenosylhomocysteine hydrolase is an adenosine-binding protein: a target for adenosine toxicity (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-11-17
    Description: When adenosine deaminase activity is inhibited, low concentrations of adenosine are toxic to human lymphoblast mutants that are unable to convert adenosine to intracellular nucleotides. In order to identify the mediator of this cytotoxicity, we searched for a cytoplasmic protein capable of binding adenosine with high affinity. Such a protein was identified in extracts of human lymphoblasts and placenta as the enzyme S-adenosylhomocysteine hydrolase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hershfield, M S -- Krodich, N M -- New York, N.Y. -- Science. 1978 Nov 17;202(4369):757-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/715439" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/*metabolism ; Adenosine Deaminase/*deficiency ; Carrier Proteins/*metabolism ; Female ; Humans ; Hydrolases/*metabolism ; Kinetics ; Lymphocytes/metabolism ; Nucleoside Deaminases/*deficiency ; Placenta/metabolism ; Pregnancy ; S-Adenosylhomocysteine/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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  • 14
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    Enhanced dexamethasone resistance in cystic fibrosis cells: potential use for heterozygote detection and prenatal diagnosis (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-07-14
    Description: Cultured skin fibroblasts from patients with cystic fibrosis (CF) are more resistant to dexamethasone toxicity than are normal cells. We now report that, when fibroblasts cultured from obligate CF heterozygotes are exposed to dexamethasone, they have an intermediate survival compared to normal and homozygous CF cells. When dexamethasone survival was tested on cells from four patients undergoing amniocentesis, cells from a woman at risk of producing a child with CF showed significant dexamethasone resistance, similar to that of fibroblasts derived from lnown CF homozygotes; the other amniotic cell specimens showed dexamethasone sensitivity similar to that of normal skin fibroblasts. These data suggest that the dexamethasone resistance previously observed in skin fibroblasts may also be useful in the prenatal diagnosis of CF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Breslow, J L -- Epstein, J -- Fontaine, J H -- Forbes, G B -- New York, N.Y. -- Science. 1978 Jul 14;201(4351):180-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/663650" target="_blank"〉PubMed〈/a〉
    Keywords: Amniotic Fluid/cytology ; Cell Survival/drug effects ; Cystic Fibrosis/diagnosis/genetics/*physiopathology ; Dexamethasone/*toxicity ; Drug Resistance ; Female ; Heterozygote ; Homozygote ; Humans ; Pregnancy ; Prenatal Diagnosis
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  • 15
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    Postpartum amenorrhea: how is it affected by maternal nutritional status? (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-06-09
    Description: The average length of postpartum amenorrhea reported by breast-feeding women in rural Bangladesh in 1975 was 18 to 20 months. Its duration was found to be only slightly related to maternal nutritional status. There was no evidence of a threshold of weight for height necessary for the resumption of menses postpartum. Factors related to the duration of postpartum amenorrhea were maternal age, socioeconomic status, and supplemental feeding of the infant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huffman, S L -- Chowdhury, A K -- Mosley, W H -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1155-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/653359" target="_blank"〉PubMed〈/a〉
    Keywords: Amenorrhea/*etiology ; Body Water/metabolism ; Body Weight ; Female ; Humans ; Infant Nutritional Physiological Phenomena ; *Lactation ; Maternal Age ; Menstruation ; Nutrition Disorders/metabolism ; *Nutritional Physiological Phenomena ; *Postpartum Period ; Pregnancy ; Socioeconomic Factors ; Time Factors
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  • 16
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    Cocaine plasma concentration: relation to physiological and subjective effects in humans (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-10-13
    Description: Volunteer subjects with previous histories of cocaine use were administered cocaine hydrochloride intravenously or intranasally. There was a positive relationship between peak plasma concentration, physiological and subjective responses, and dose administered. The rate of cocaine disappearance after intravenous administration paralleled the drop in physiological and subjective drug effects. After intranasal administration, blood levels remained elevated for a considerably longer period.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Javaid, J I -- Fischman, M W -- Schuster, C R -- Dekirmenjian, H -- Davis, J M -- New York, N.Y. -- Science. 1978 Oct 13;202(4364):227-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/694530" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Intranasal ; Cocaine/administration & dosage/*blood/*pharmacology ; Dose-Response Relationship, Drug ; Euphoria/*drug effects ; Heart Rate/drug effects ; Humans ; Injections, Intravenous ; Kinetics ; Metabolic Clearance Rate
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  • 17
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    Neurotrophic protein regulates muscle acetylcholinesterase in culture (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-04-21
    Description: Skeletal muscles lose acetylcholinesterase in culture as a result of denervation. A protein fraction isolated from peripheral nerves maintained the level of acetylcholinesterase in cultures of aneural embryonic muscle or denervated adult chicken muscle. These results indicate that trophic regulation of muscle acetylcholinesterase might be mediated by a protein produced by nerves.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oh, T H -- Markelonis, G J -- New York, N.Y. -- Science. 1978 Apr 21;200(4339):337-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/635593" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholinesterase/biosynthesis/*metabolism ; Cells, Cultured ; Enzyme Induction/drug effects ; Muscle Denervation ; Muscles/*enzymology ; Nerve Tissue Proteins/*pharmacology ; Peripheral Nerves/*physiology
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  • 18
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    Prenatal diagnosis of genetic disorders (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-26
    Description: Sampling of amniotic fluid, visualization of the fetus, fetal blood sampling, and screening of maternal blood represent successive approaches to the diagnosis of specific genetic disorders in the second trimester of pregnancy. Clinical and ethical concerns about the appropriateness, safety, and efficacy of the techniques have led to multidisciplinary assessments at an early stage. A major growth in demand for medical and educational genetic services can be anticipated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Omenn, G S -- New York, N.Y. -- Science. 1978 May 26;200(4344):952-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/77042" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Amniocentesis/adverse effects/methods ; Amniotic Fluid/analysis ; Chromosome Aberrations/diagnosis ; Chromosome Disorders ; Congenital Abnormalities/diagnosis ; Female ; Fetal Blood/analysis ; Fetoscopy/methods ; Genetic Diseases, Inborn/*diagnosis/therapy ; Humans ; Metabolism, Inborn Errors/diagnosis ; Pregnancy ; Prenatal Diagnosis/*methods ; Ultrasonography ; alpha-Fetoproteins/analysis
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  • 19
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    Far-ultraviolet stopped-flow circular dichroism (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-01-27
    Description: A stopped-flow circular dichroism instrument, with a total accessible wavelength range of 200 to 750 nanometers, has been constructed and provides a spectroscopic method for kinetic investigations of a wide array of fast reactions in which optical activity changes in absorbing regions are involved. An important biochemical application depends on the far-ultraviolet capability, which allows observation of the rapid alterations in backbone conformation associated with folding and unfolding reactions of proteins. Results obtained by following two such reactions at 222 nanometers represent direct monitoring by circular dichroism of rapid secondary structure changes in proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Luchins, J -- Beychok, S -- New York, N.Y. -- Science. 1978 Jan 27;199(4327):425-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/619462" target="_blank"〉PubMed〈/a〉
    Keywords: *Circular Dichroism ; Hemoglobins ; Kinetics ; Methemoglobin ; *Protein Conformation ; Protein Denaturation ; Spectrophotometry, Ultraviolet/methods ; *Spectrum Analysis
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  • 20
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    Different actions of anticonvulsant and anesthetic barbiturates revealed by use of cultured mammalian neurons (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-19
    Description: Barbiturate anesthetics, but not anticonvulsants, abolish the spontaneous activity of cultured spinal cord neurons; directly increase membrane conductance, an effect which is suppressed by the gamma-aminobutyric acid (GABA) antagonists picrotoxin and penicillin; and are more potent than anticonvulsants in augmenting GABA and depressing glutamate responses. Barbiturate anticonvulsants abolish picrotoxin-induced convulsive activity. These results indicate qualitative and quantitative differences between anesthetic and anticonvulsant barbiturates, which may explain their different clinical effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Macdonald, R L -- Barker, J L -- New York, N.Y. -- Science. 1978 May 19;200(4343):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/205953" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Cells, Cultured ; Electric Conductivity ; Glutamates/pharmacology ; Membrane Potentials/drug effects ; Neurons/*drug effects ; Pentobarbital/*pharmacology ; Phenobarbital/*pharmacology ; Picrotoxin/pharmacology ; Receptors, Neurotransmitter/drug effects ; gamma-Aminobutyric Acid/pharmacology
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  • 21
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    Specific-opiate-induced depression of transmitter release from dorsal root ganglion cells in culture (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-31
    Description: The opiate etorphine depresses monosynaptic excitatory postsynaptic potentials (EPSP's) elicited in spinal cord cells by activation of dorsal root ganglion cells in murine neuronal cell culture. The depression is reversed by naloxone. Statistical analysis of the synaptic responses reveals that the opiate reduces EPSP quantal content at this synapse without altering quantal size. Therefore, the opiate action is presynaptic and affects transmitter release rather than postsynaptic responsiveness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Macdonald, R L -- Nelson, P G -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1449-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/204015" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Depression, Chemical ; Dose-Response Relationship, Drug ; Etorphine/*pharmacology ; Ganglia, Spinal/*drug effects ; Membrane Potentials/drug effects ; Morphinans/*pharmacology ; Naloxone/pharmacology ; Nerve Endings/drug effects ; Spinal Cord/drug effects ; Synapses/drug effects ; Synaptic Transmission/*drug effects
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  • 22
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    Zinc deficiency in murine milk underlies expression of the lethal milk (lm) mutation (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-01-13
    Description: The inability of nursing pups to survive on milk of mice homozygous for the recessive mutation, lethal milk (lm), is correlated with a reduction in zinc levels of both milk and pup carcass. Administration of zinc to pups nursing on lmlm dams reduces the observed mortality and morbidity. It is suggested that lm alters zinc transport from maternal blood to milk and that its study may provide useful information for understanding the rare human disease, acrodermatitis enteropathica.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Piletz, J E -- Ganschow, R E -- New York, N.Y. -- Science. 1978 Jan 13;199(4325):181-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/619449" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; *Lactation ; Mice ; Mice, Inbred C57BL/*genetics ; Milk/*metabolism ; Pregnancy ; Zinc/blood/*deficiency/metabolism
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  • 23
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    Restriction enzymes: prenatal diagnosis of genetic disease (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-12-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1978 Dec 8;202(4372):1068-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/715458" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Sickle Cell/*diagnosis/genetics ; DNA Restriction Enzymes/*metabolism ; Female ; Globins/genetics ; Humans ; Pregnancy ; Prenatal Diagnosis/*methods ; Thalassemia/*diagnosis
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  • 24
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    Antibodies (II): another look at the diversity problem (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-10-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1978 Oct 27;202(4366):412-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/705333" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/genetics ; Antibody Formation ; *Antibody Specificity ; Genes ; Genetic Linkage ; Immunoglobulins/*genetics ; Mice/embryology ; Models, Biological ; Recombination, Genetic
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  • 25
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    Potent antidopaminergic activity of estradiol at the pituitary level on prolactin release (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-06-09
    Description: Prior incubation of rat anterior pituitary cells with 17beta-estradiol led to an almost complete reversal of the inhibitory effect of two dopamine agonists, dihydroergocornine and RU 24213, on both basal prolactin release and thyrotropin releasing hormone-induced prolactin release. These experiments thus demonstrate a direct interference of dopamine action by a peripheral hormone. Prolactin secretion by pituitary cells in primary culture could possibly serve as an easily accessible model of a system under dopaminergic control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raymond, V -- Beaulieu, M -- Labrie, F -- Boissier, J -- New York, N.Y. -- Science. 1978 Jun 9;200(4346):1173-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/418505" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Dihydroergotoxine/antagonists & inhibitors ; *Dopamine Antagonists ; Estradiol/*pharmacology ; Female ; Phenethylamines/antagonists & inhibitors ; Pituitary Gland, Anterior/*drug effects/secretion ; Prolactin/*secretion ; Rats ; Thyrotropin-Releasing Hormone/pharmacology
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  • 26
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    The genome of simian virus 40 (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-05
    Description: The nucleotide sequence of SV40 DNA was determined, and the sequence was correlated with known genes of the virus and with the structure of viral messenger RNA's. There is a limited overlap of the coding regions for structural proteins and a complex pattern of leader sequences at the 5' end of late messenger RNA. The sequence of the early region is consistent with recent proposals that the large early polypeptide of SV40 is encoded in noncontinguous segments of DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reddy, V B -- Thimmappaya, B -- Dhar, R -- Subramanian, K N -- Zain, B S -- Pan, J -- Ghosh, P K -- Celma, M L -- Weissman, S M -- New York, N.Y. -- Science. 1978 May 5;200(4341):494-502.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/205947" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosome Mapping ; Codon ; DNA Replication ; DNA, Circular ; DNA, Viral ; Genes ; *Genes, Viral ; Simian virus 40/*genetics ; Transcription, Genetic ; Viral Proteins/genetics
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  • 27
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    Jaundice phototherapy: micro flow-cell photometry reveals rapid biliary response of Gunn rats to light (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-01
    Description: Hepatic pigment clearance in rats can be followed continuously with photometric detectors designed for high-pressure liquid chromatography. This method showed that light has a fast effect on bilirubin metabolism in homozygous Gunn rats, even at low doses and intensities. This is consistent with geometric isomerization of bilirubin IXalpha as a primary step in phototherapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McDonagh, A F -- Ramonas, L M -- New York, N.Y. -- Science. 1978 Sep 1;201(4358):829-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/581101" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bile/metabolism ; Bilirubin/blood/*metabolism/radiation effects ; *Disease Models, Animal ; Humans ; Infant, Newborn ; Jaundice, Neonatal/*therapy ; Kinetics ; Liver/metabolism ; *Phototherapy ; Rats
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  • 28
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    Enhancement of bovine pancreatic ribonuclease activity by mercaptoethanol (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-10
    Description: Incubation of ribonuclease with 0.1M mercaptoethanol at pH 8.5 can increase the enzyme's hydrolytic activity toward cytidine 2',3'-monophosphate (cyclic CMP) under standard assay conditions. Cation-exchange chromatography of the ribonuclease-thiol reaction mixture revealed seven fractions. The fraction with the highest activity had an approximate tenfold decrease in the apparent Michaelis constant for cyclic CMP with respect to native ribonuclease. The enhanced activity is a metastable property since this fraction reverts back to the control activity and chromatographic behavior of native ribonuclease on standing in solution at room temperature.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watkins, J B -- Benz, F W -- New York, N.Y. -- Science. 1978 Mar 10;199(4333):1084-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/564548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Disulfides/pharmacology ; Enzyme Activation/drug effects ; Glutathione/pharmacology ; Kinetics ; Mercaptoethanol/*pharmacology ; Oxidation-Reduction ; Pancreas/enzymology ; Protein Conformation ; Ribonucleases/*metabolism ; Structure-Activity Relationship
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  • 29
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    Nature and nurture in development of the autonomic neuron (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-31
    Description: Arguments are presented for the hypothesis that during an early stage of development the cells which become principal neurons of the autonomic nervous system possess information regarding the positions they will occupy within the body. A second stage of development, during which a decision is made regarding which neurotransmitter to employ, is delayed until each neuron has assumed its permanent position in the body and has sampled, presumably via its growing axons, the peripheral field which it will innervate. The development of cholinergic mechanisms takes precedence; adrenergic neurons may develop only when cholinergic sites have been occupied. An extended period during which the differentiation of transmitter mechanisms may be modulated permits the neuron to adequately sample the periphery prior to commitment to a specific transmitter economy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bunge, R -- Johnson, M -- Ross, C D -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1409-16.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24273" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic Fibers/cytology ; Animals ; Autonomic Nervous System/*embryology/growth & development ; Cell Differentiation ; Cells, Cultured ; Chimera ; Cholinergic Fibers/cytology ; Embryonic Induction ; Ganglia, Autonomic/cytology ; Heart/innervation ; Intestines/innervation ; Nerve Endings/ultrastructure ; Neurotransmitter Agents/metabolism ; Phylogeny ; Synaptic Vesicles/ultrastructure
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  • 30
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    Metabolism of theophylline to caffeine in human fetal liver (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-12-14
    Description: Caffeine (1,3,7-trimethylxanthine) is a biotransformation product of theophylline (1,3-dimethylxanthine) in the human fetus. Liver explants, obtained from human fetuses with gestational ages of 12 to 20 weeks, were incubated with theophylline and produced caffeine and, in lesser amounts, 1,3-dimethyluric acid and 3-methylxanthine. These findings suggest that the predominant pathway in theophylline metabolism in the fetus and newborn infant is the methylation reaction producing caffeine. This may contribute to the neonate's exceedingly slower elimination of caffeine relative to theophylline. Caffeine produced from theophylline may add to the pharmacologic effects of theophylline in newborn infants with apnea.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aranda, J V -- Louridas, A T -- Vitullo, B B -- Thom, P -- Aldridge, A -- Haber, R -- New York, N.Y. -- Science. 1979 Dec 14;206(4424):1319-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/515734" target="_blank"〉PubMed〈/a〉
    Keywords: Apnea/drug therapy ; Biotransformation ; Caffeine/*biosynthesis/metabolism/therapeutic use ; Cells, Cultured ; Gestational Age ; Humans ; Infant, Newborn ; Liver/*embryology/metabolism ; Methylation ; Theophylline/*metabolism/therapeutic use
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    The problem of defensive medicine (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-26
    Description: Defensive medicine--the use of diagnostic and end-treatment measures explicitly for the purposes of averting malpractice suits--is frequently cited as one of the least desirable effects of the current rise in medical litigation. Many physicians and policy-makers claim that defensive medicine is responsible not only for the increasing costs of health care but the exposing of patients to significant risks of harm from unnecessary procedures. Very little solid information is available about defensive medicine. The studies that have been conducted have been fraught with statistical difficulties and are by no means definitive. Even more important than the issue of defensive medicine is the more basic problem of our system of compensation for medical injuries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tancredi, L R -- Barondess, J A -- New York, N.Y. -- Science. 1978 May 26;200(4344):879-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/644329" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Cesarean Section/utilization ; Child ; Costs and Cost Analysis ; Craniocerebral Trauma/radiography ; *Defensive Medicine/economics ; Female ; Fetal Monitoring/utilization ; Humans ; *Malpractice/economics ; Physician-Patient Relations ; Pregnancy ; Quality of Health Care ; Surveys and Questionnaires ; United States
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  • 32
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    Enhanced 5-fluorouracil nucleotide formation after methotrexate administration: explanation for drug synergism (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-14
    Description: Exposure of L1210 leukemia cells first to 0.1 to 100 micromolar methotrexate and then to 10 micromolar 5-fluorouracil produces a synergistic effect on the number of cells killed in culture. Methotrexate dose-related increases occur in the concentrations of intracellular 5-fluorouracil ribonucleotides and 5-fluoro-2'-deoxyuridylate and in the incorporation of 5-fluorouracil into RNA. These increases are correlated with increased concentrations of intracellular phosphoribosylpyrophosphate. It is proposed that the enhanced formation of ribonucleotides of 5-fluorouracil and the subsequent incorporation of these compounds into RNA in methotrexate-treated cells may account for synergism between these agents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cadman, E -- Heimer, R -- Davis, L -- New York, N.Y. -- Science. 1979 Sep 14;205(4411):1135-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472732" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Drug Administration Schedule ; Drug Synergism ; Fluorouracil/metabolism/*pharmacology ; Leukemia L1210 ; Methotrexate/*pharmacology ; Mice ; Phosphoribosyl Pyrophosphate/metabolism ; RNA, Neoplasm/metabolism ; Ribonucleotides/metabolism ; Thymidylate Synthase/metabolism
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  • 33
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    Regulation of gene expression: possible role of repetitive sequences (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-06-08
    Description: Large contrasts are observed between the messenger RNA populations of different tissues and of embryos at different stages of development. Nevertheless, coding sequences for genes not expressed in a cell appear to be present in its nuclear RNA. Though many nuclear RNA transcripts of single copy DNA sequences are held in common between tissues, an additional set, probably consisting of non-message sequences, is not shared. Nuclear RNA also contains transcripts of repetitive DNA sequences. Certain repeat families are represented at high levels in the nuclear RNA of particular tissues and much lower levels in others. It is surprising that both complements of most repeat sequences are present in nuclear RNA. These observations lead to model for regulation of gene expression in which the formation of repetitive RNA-RNA duplexes controls the production of messenger RNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davidson, E H -- Britten, R J -- New York, N.Y. -- Science. 1979 Jun 8;204(4397):1052-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Nucleus/physiology ; DNA/*genetics ; Genes ; *Genes, Regulator ; Hydrogen Bonding ; Mammals/embryology ; Models, Biological ; Polyribosomes/metabolism ; *RNA, Heterogeneous Nuclear/genetics ; RNA, Messenger/genetics ; Sea Urchins/embryology ; *Transcription, Genetic
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    Neuronal chemotaxis: chick dorsal-root axons turn toward high concentrations of nerve growth factor (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-11-30
    Description: Micropipettes containing 2 to 50 biological units of beta growth factor (NGF) were placed near growing axons of chick dorsal-root ganglion neurons in tissue culture. The axons turned and grew toward the NGF source within 21 minutes. This turning response to elevated concentrations of NGF appears to represent chemotactic guidance rather than a general enhancement of growth rate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gundersen, R W -- Barrett, J N -- New York, N.Y. -- Science. 1979 Nov 30;206(4422):1079-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493992" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/growth & development/*physiology ; Cells, Cultured ; *Chemotaxis/drug effects ; Chick Embryo ; Dose-Response Relationship, Drug ; Ganglia, Spinal/physiology ; Nerve Growth Factors/*pharmacology
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  • 35
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    Difference between postpartum and nutritional amenorrhea (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-03-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frisch, R E -- McArthur, J W -- New York, N.Y. -- Science. 1979 Mar 2;203(4383):921-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/419411" target="_blank"〉PubMed〈/a〉
    Keywords: Amenorrhea/*etiology/physiopathology ; Body Weight ; Female ; Humans ; Lactation ; Nutrition Disorders/complications ; Pregnancy ; Time Factors
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    Radioimmunoassay of the insulin receptor: a new probe of receptor structure and function (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-02-09
    Description: A sensitive and specific radioimmunoassay for the insulin receptor has been developed employing receptor autoantibodies from the serum of a patient with insulin-resistant diabetes. The assay detects insulin binding sites at concentrations as low as 0.1 nanomolar; distinguishes between receptors originating from human placental membranes, human lymphoblastoid cells, and mouse liver membranes; and measures the receptor independently of its binding function. Down-regulation, or loss of binding after exposure to insulin, is associated with loss of immunoreactive receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrison, L C -- Flier, J -- Itin, A -- Kahn, C R -- Roth, J -- New York, N.Y. -- Science. 1979 Feb 9;203(4380):544-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/83675" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Antibody Reactions ; Binding Sites ; Binding Sites, Antibody ; Epitopes ; Female ; Humans ; Liver/analysis ; Lymphocytes/analysis ; Mice ; Placenta/analysis ; Pregnancy ; Radioimmunoassay/methods ; Receptor, Insulin/analysis/*immunology ; Solubility
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    Specific nonopiate receptors for beta-endorphin (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-07
    Description: Iodinated beta H-[2-D-alanine]endorphin exhibits specific binding to cultured human lymphocytes. The binding is inhibited by low concentrations of beta-endorphin and its D-alanine derivative, but is not affected by opiate agonists and antagonists, or by enkephalin analogs, beta-lipotropin, adrenocorticotrophic hormone, or alpha-melanocyte-stimulating hormone; this suggests the existence of a specific, non-opiate binding site (receptor) for beta-endorphin. The carboxy-terminal region of beta-endorphin is essential for this binding activity, since alpha-endorphin is not active. beta-Endorphin may be a circulating hormone with peripheral physiological effects that are not primarily mediated through interactions with opiate or enkephalin receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hazum, E -- Chang, K J -- Cuatrecasas, P -- New York, N.Y. -- Science. 1979 Sep 7;205(4410):1033-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224457" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cells, Cultured ; Endorphins/blood/*metabolism ; Humans ; Lymphocyte Activation ; Lymphocytes/*metabolism ; Receptors, Drug/*metabolism ; Receptors, Opioid/metabolism ; Stress, Physiological/metabolism ; Structure-Activity Relationship
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  • 38
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    Genetic linkage of C3H/HeJ and BALB/c endogenous ecotropic C-type viruses to phosphoglucomutase-1 on chromosome 5 (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-04-06
    Description: The genetic linkage of the endogenous C3H/HeJ C-type ecotropic virus to phosphoglucomutase-1 (0.28, recombinant fraction) on chromosome 5 was established by means of serological assays of backcrossed mice. With a combination of serological techniques and DNA-DNA hybridization the BALB/c endogenous ecotropic virus was shown to be either closely linked or allelic with the C3H/HeJ locus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ihle, J N -- Joseph, D R -- Domotor, J J Jr -- New York, N.Y. -- Science. 1979 Apr 6;204(4388):71-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/219476" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Genes ; *Genes, Viral ; Genetic Linkage ; Leukemia Virus, Murine/genetics ; Mice ; Mice, Inbred BALB C/*microbiology ; Mice, Inbred C3H/*microbiology ; Mice, Inbred Strains/genetics ; Phenotype ; Phosphoglucomutase/*genetics ; Retroviridae/*genetics
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  • 39
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    Genetic mechanism accounting for precise immunoglobulin domain deletion in a variant of MPC 11 myeloma cells (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-12-14
    Description: A variant of the MPC 11 cell line, M 311, produces a short immunoglobulin heavy chain. When compared with the parental gamma 2b heavy chain, M 311 was found to have a carboxyl terminal deletion comprising the CH3 domain. The COOH-terminal cyanogen bromide (CNBr) cleavage fragment of M 311 is identical to a corresponding segment ofa parental heavy chain CNBr fragment, with the exception of a substitution of asparagine for lysine at the COOH-terminal residue. This observation enabled prediction of both the parental DNA sequence in this region and the genetic mechanism which generated the variant, a frameshift followed by premature termination. This hypothesis is supported by studies of the DNA sequence of the MPC 11 gamma 2b constant region gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kenter, A L -- Birshtein, B K -- R21 AI106328/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1979 Dec 14;206(4424):1307-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/117550" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromosome Deletion ; Genes ; Immunoglobulin G/*genetics ; Immunoglobulin gamma-Chains/genetics ; Macromolecular Substances ; Melphalan/pharmacology ; Mice ; Mutation ; Myeloma Proteins/*genetics ; Neoplasms, Experimental/genetics ; Peptide Chain Termination, Translational ; Plasmacytoma/genetics
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  • 40
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    [3H]GABA binding in brains from Huntington's chorea patients: altered regulation by phospholipids? (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-09-14
    Description: Binding sites for tritum-labeled gamma-aminobutyric acid (GABA) in cerebellar cortex of Huntington's chorea patients have an increased affinity but unaltered maximum capacity as compared to binding sites in tissue from control patients. A similar binding pattern is produced in control membranes by treatment with Triton X-100, phospholipase C, or glycerophosphoethanolamine. Thus, it is likely that phospholipids or their metabolites regulate the accessibility of the GABA binding site and that this regulation is abnormal in Huntington's chorea.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lloyd, K G -- Davidson, L -- New York, N.Y. -- Science. 1979 Sep 14;205(4411):1147-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224459" target="_blank"〉PubMed〈/a〉
    Keywords: Cerebellar Cortex/*metabolism ; Humans ; Huntington Disease/*metabolism ; Kinetics ; Membrane Lipids ; Phosphatidylethanolamines/physiology ; Polyethylene Glycols/pharmacology ; Receptors, Neurotransmitter/drug effects/*metabolism ; gamma-Aminobutyric Acid/*metabolism
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  • 41
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    Inosine may be an endogenous ligand for benzodiazepine receptors on cultured spinal neurons (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-17
    Description: Mouse spinal neurons grown in tissue culture were used to study the membrane effects of the benzodiazepine flurazepam and the naturally occurring purine nucleoside inosine, which competes for benzodiazepine receptor sites in the central nervous system. Application of inosine elicited two types of transmitter-like membrane effects: a rapidly desensitizing excitatory response and a nondesensitizing inhibitory response. Flurazepam produced a similar excitatory response which showed cross-desensitization with the purine excitation. Flurazepam also blocked the inhibitory inosine response. The results provide electrophysiological evidence that an endogenous purine can activate two different conductances on spinal neurons and that flurazepam can activate one of the conductances and antagonize the other.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacDonald, J F -- Barker, J L -- Paul, S M -- Marangos, P J -- Skolnick, P -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):715-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/37602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzodiazepines/*metabolism ; Cells, Cultured ; Electric Conductivity ; Flurazepam/antagonists & inhibitors ; Inosine/*metabolism/pharmacology ; Ligands ; Mice ; Neurotransmitter Agents/metabolism ; Receptors, Drug/*metabolism ; Receptors, Neurotransmitter/metabolism ; Spinal Cord/*metabolism
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  • 42
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    Intercellular communication in pancreatic islet monolayer cultures: a microfluorometric study (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-05-25
    Description: Single islet cells in monolayer cultures of neonatal rat pancreas were microinjected with fluorescein and scanned topographically by microfluorometry. Fluorescein spread from an injected islet cell directly into neighboring islet cells, and, in the presence of 16.7 millimolar glucose, significantly more islet cells communicated with the injected cell than in glucose-free medium. Islet cells were also microinjected with glycolytic substrates and activators that produced transient changes in cellular levels of reduced pyridine nucleotides-nicotinamide adenine dinucleotide and nicotinamide adenine dinucleotide phosphate [NAD(P)H]. Changes in NAD(P)H fluorescence were observed in islet cells incubated first for 18 hours in very low glucose concentrations and then in a glucose-free medium and injected with glycolytic substrates and activators; however, little change of fluorescence occurred in adjacent islet cells. In contrast, after adding 16.7 millimolar glucose to the medium, injection of glycolytic substrates and activators produced transient changes in NAD(P)H fluorescence in the injected cell and in neighboring cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kohen, E -- Kohen, C -- Thorell, B -- Mintz, D H -- Rabinovitch, A -- New York, N.Y. -- Science. 1979 May 25;204(4395):862-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/35828" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Communication/drug effects ; Fluoresceins ; Glucose/pharmacology ; Glycolysis ; Islets of Langerhans/cytology/*physiology ; Kinetics ; NAD/metabolism ; NADP/metabolism ; Rats ; Spectrometry, Fluorescence
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    Scientists attack report that obstetrical medications endanger children (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-04-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1979 Apr 27;204(4391):391-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/87012" target="_blank"〉PubMed〈/a〉
    Keywords: Anesthesia, Obstetrical/*adverse effects ; Child ; Child Development/*drug effects ; Child, Preschool ; Delivery, Obstetric/methods ; Developmental Disabilities/chemically induced ; Female ; Humans ; Infant ; Infant, Newborn ; Labor, Obstetric ; Methods ; Pregnancy
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    New information about the development of the autonomic nervous system (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1979 Oct 26;206(4417):434-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/41320" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism ; Adrenergic Fibers/growth & development ; Animals ; Autonomic Nervous System/*growth & development ; Cell Communication ; Cell Differentiation ; Cells, Cultured ; Cholinergic Fibers/growth & development ; Nerve Growth Factors/physiology ; Neural Crest/cytology ; Neural Pathways/growth & development ; Neurotransmitter Agents/*metabolism ; Synaptic Transmission
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  • 45
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    Clomid administration to pregnant rats causes abnormalities of the reproductive tract in offspring and mothers (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-05-11
    Description: In rats, a single injection of clomiphene citrate (Clomid) during pregnancy causes multiple abnormalities of the reproductive tract in the offspring and mothers. These abnormalities probably result from the ability of Clomid to cause long-term estrogenic stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCormack, S -- Clark, J H -- New York, N.Y. -- Science. 1979 May 11;204(4393):629-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432668" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced/*pathology ; Animals ; Clomiphene/*toxicity ; Fallopian Tubes/pathology ; Female ; Metaplasia ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Uterine Diseases/chemically induced/pathology ; Vaginal Diseases/chemically induced
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    DNA synthesis and mitosis in adult amphibian cardiac muscle cells in vitro (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-09-21
    Description: High-resolution autoradiography and fine structural analysis of adult newt heart tissue in long-term culture revealed that tritiated thymidine was concentrated in the nuclei of dedifferentiated myocardial cells. Mitotic chromosomes were observed in some of these cells. This demonstrates that adult amphibian myocardial cells in vitro are capable of DNA synthesis and mitosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Healy, C J -- Cheng, M -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1281-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472744" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cells, Cultured ; DNA/*biosynthesis ; *Mitosis ; Muscle Proteins/metabolism ; Myocardial Contraction ; Myocardium/*metabolism ; Salamandridae ; Time Factors
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  • 47
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    A structural model for the kinetic behavior of hemoglobin (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-11-30
    Description: The tertiary structures of all liganded hemoglobins in the R state differ in detail. Steric hindrance arising from nonbonded ligand-globin interactions affects the binding of ligands such as CO and cyanide which preferentially form linear axial complexes to heme; these ligands bind in a strained off-axis configuration. Ligands such as O2 and NO, which preferentially form bent complexes, encounter less steric hindrance and can bind in their (preferred) unstrained configuration. Linear complexes distort the ligand pockets in the R state (and by inference, in the T state) more than bent complexes. These structural differences between linear and bent complexes are reflected in the kinetic behavior of hemoglobin. Structural interpretation of this kinetic behavior indicates that the relative contributions of nonbonded ligand-globin interactions and nonbonded heme interactions to transition state free energies differ for linear and bent ligands. The relative contributions of these interactions to the free energy of cooperativity may also differ for linear and bent ligands. Thus the detailed molecular mechanism by which the affinity of heme is regulated differs for different ligands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moffat, K -- Deatherage, J F -- Seybert, D W -- New York, N.Y. -- Science. 1979 Nov 30;206(4422):1035-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/493990" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Animals ; Heme/*metabolism ; Hemoglobins/metabolism ; Horses ; Kinetics ; Ligands ; Oxygen/*metabolism ; Oxyhemoglobins/*metabolism ; Protein Conformation ; Stereoisomerism ; Structure-Activity Relationship
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  • 48
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    Octopamine receptors, adenosine 3',5'-monophosphate, and neural control of firefly flashing (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-01-05
    Description: An adenylate cyclase activated as much as 25-fold by low concentrations of octopamine has been identified in the firefly lantern. The relative potency of octopamine and various other amines in stimulating this enzyme, and effects of antagonists in blocking octopamine activation, correlate well with the known effects of these agents in affecting light production. In addition to suggesting a role for adenosine 3',5'-monophosphate (or pyrophosphate) in the neural control of firefly flashing, identification of this potent enzyme should facilitate the characterization of phenylethylamine receptors in excitable tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nathanson, J A -- New York, N.Y. -- Science. 1979 Jan 5;203(4375):65-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/214856" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/*metabolism ; Animals ; Beetles/*physiology ; Catecholamines/pharmacology ; Cyclic AMP/*biosynthesis ; Dose-Response Relationship, Drug ; Enzyme Activation/drug effects ; Kinetics ; Octopamine/*pharmacology ; Phentolamine/pharmacology ; Propranolol/pharmacology ; Receptors, Cell Surface/*drug effects ; Receptors, Neurotransmitter/*drug effects ; Structure-Activity Relationship
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    Endogenous inhibitor of colchicine-tubulin binding in rat brain (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-08-10
    Description: A competitive inhibitor of colchicine binding to tubulin has been found in rat brain. Most of the inhibitor is associated with microsomes but some inhibitor, with an apparent molecular weight of approximately 250,000, is found in the cytosol. Both the microsomal and cytosol inhibitors are heat- and trypsin-sensitive, indicating that a protein moiety is required for activity. The microsomes bind tubulin directly; the microsomal and cytosol fractions both inhibit microtubule assembly in vitro. The inhibitor may function in the living cell to bind and sequester non-polymerized tubulin. Regulation of tubulin attachment to microsomes could then control the concentration of cytosolic tubulin available for microtubule assembly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sherline, P -- Schiavone, K -- Brocato, S -- New York, N.Y. -- Science. 1979 Aug 10;205(4406):593-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451622" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; Colchicine/*metabolism ; Cytosol/physiology ; Glycoproteins/*metabolism ; Kinetics ; Microsomes/metabolism ; Microtubules/ultrastructure ; Nerve Tissue Proteins/*physiology ; Protein Binding/drug effects ; Rats ; Tubulin/*metabolism
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    Dynamic changes in circulating 1,25-dihydroxyvitamin D during reproduction in rats (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-06-29
    Description: The concentrations of 1,25-dihydroxyvitamin D [1,25-(OH)2D], calcium, and phosphorus were measured in the serum of rats during pregnancy and at various stages of lactation. The concentration of 1,25-(OH)2D hormone increased almost two-fold during pregnancy and the latter part of lactation, but decreased to control levels or very low values immediately after birth and weaning, respectively. Furthermore, the concentration of 1,25-(OH)2D was inversely correlated with the concentration of calcium, suggesting that circulating 1,25-(OH)2D fluctuates in concert with calcium demands during the reproductive cycle. Parathyroidectomy in lactating rats caused a 70 percent inhibition of the normally observed 1,25-(OH)2D increase, indicating that parathyroid hormone, in response to changes in serum calcium, is a primary modulator of 1,25-(OH)2D during lactation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pike, J W -- Parker, J B -- Haussler, M R -- Boass, A -- Toverud, S V -- New York, N.Y. -- Science. 1979 Jun 29;204(4400):1427-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/451573" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/blood ; Dihydroxycholecalciferols/*blood ; Female ; Hydroxycholecalciferols/*blood ; *Lactation ; Parathyroid Glands/physiology ; Parathyroid Hormone/physiology ; Phosphorus/blood ; Pregnancy ; *Pregnancy, Animal ; Rats
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    Nickel carbonyl: prenatal exposure (1979)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1979-03-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warner, J S -- New York, N.Y. -- Science. 1979 Mar 23;203(4386):1194-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424746" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Female ; Humans ; Ketones/*toxicity ; Nickel/*toxicity ; Occupational Medicine ; Pregnancy ; Rats ; *Teratogens
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  • 52
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    Substance P: evidence for diverse roles in neuronal function from cultured mouse spinal neurons (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-28
    Description: Mouse spinal neurons grown in tissue culture were used to examine the membrane mechanisms of action of the peptide substance P. Two functionally distinct actions were observed, one being a rapidly desensitizing excitation, and the other being a dose-dependent, reversible depression of excitatory responses to the putative amino acid neurotransmitter glutamate. These effects on excitability suggest that substance P may play more than one role in intercellular communication in the nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vincent, J D -- Barker, J L -- New York, N.Y. -- Science. 1979 Sep 28;205(4413):1409-12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/224464" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Communication ; Cells, Cultured ; Electric Conductivity ; Excitatory Amino Acid Antagonists ; Glutamates/pharmacology ; Membrane Potentials ; Mice ; Neural Inhibition ; Spinal Cord/cytology/*physiology ; Substance P/*physiology ; Synaptic Transmission
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    4-aminobutyrate:2-oxoglutarate aminotransferase in blood platelets (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-17
    Description: Platelet lysates obtained from blood of humans, dogs, and rats catalyzed the transamination of 4-aminobutyrate with 2-oxoglutarate as cosubstrate. Human platelet 4-aminobutyrate:2-oxoglutarate aminotransferase (36.5 +/- 3.2 picomoles per minute per milligram of platelet protein) resembled the brain enzyme in kinetic properties and in response to cofactors and inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉White, H L -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):696-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462176" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Aminobutyrate Transaminase/*blood ; Animals ; Blood Platelets/*enzymology ; Brain/enzymology ; Dogs ; Enzyme Activation/drug effects ; Humans ; Kinetics ; Pyridoxal Phosphate/pharmacology ; Rats ; Substrate Specificity ; Transaminases/*blood ; gamma-Aminobutyric Acid/blood
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    Fetal exposure to narcotics: neonatal sleep as a measure of nervous system disturbance (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-01
    Description: Newborn infants, chronically exposed in utero to low doses of methadone with or without concomitant heroin, display more rapid eye movement sleep and less quiet sleep than control infants, while babies fetally exposed to both opiates and nonopiates have less organization of sleep states. Other perinatal factors, such as birth weight and gestational age, are related more to the amount of fetal drug exposure than to the type.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dinges, D F -- Davis, M M -- Glass, P -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):619-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7190326" target="_blank"〉PubMed〈/a〉
    Keywords: Birth Weight ; Female ; Heroin/*adverse effects ; Heroin Dependence/drug therapy ; Humans ; Infant, Newborn ; Infant, Newborn, Diseases/*chemically induced ; Maternal-Fetal Exchange ; Methadone/*adverse effects/therapeutic use ; Nervous System Diseases/*chemically induced ; Pregnancy ; Sleep/*drug effects ; Substance-Related Disorders
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    L-Ornithine decarboxylase:an essential role in early mammalian embryogenesis (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-02
    Description: The highly selective, enzyme-activated, irreversible inhibitor of L-ornithine decarboxylase, DL-alpha-difluoromethylornithine, suppresses the increase in uterine L-ornithine decarboxylase activity associated with early embryogenesis in the mouse and arrests embryonic development at that stage. Contragestational effects were confirmed in the rat and rabbit. An increase in L-ornithine decarboxylase activity that leads to a rapid increase in putrescine concentration appears to be essential during a critical period after implantation for continued mammalian embryonal growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fozard, J R -- Part, M L -- Prakash, N J -- Grove, J -- Schechter, P J -- Sjoerdsma, A -- Koch-Weser, J -- New York, N.Y. -- Science. 1980 May 2;208(4443):505-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6768132" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosylmethionine Decarboxylase/metabolism ; Animals ; Carboxy-Lyases/*physiology ; Eflornithine ; Embryo, Mammalian/drug effects/*physiology ; Female ; Gestational Age ; Mice ; Ornithine/*analogs & derivatives/pharmacology ; Ornithine Decarboxylase/*physiology ; Ornithine Decarboxylase Inhibitors ; Polyamines/metabolism ; Pregnancy ; Rabbits ; Rats ; Uterus/drug effects/*metabolism
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    Bioactive conformation of luteinizing hormone-releasing hormone: evidence from a conformationally constrained analog (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-07
    Description: An analog of luteinizing hormone-releasing hormone containing a gamma-lactam as a conformational constraint has been prepared with the use of a novel cyclization of a methionine sulfonium salt. The analog is more active as a luteinizing hormone-releasing hormone agonist that the parent hormone, and provides evidence for a bioactive conformation containing a beta-turn.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freidinger, R M -- Veber, D F -- Perlow, D S -- Brooks, J R -- Saperstein, R -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):656-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001627" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Assay ; Cells, Cultured ; Female ; *Gonadotropin-Releasing Hormone/analogs & derivatives ; Hydrogen Bonding ; Lactams ; Protein Conformation ; Rats ; Structure-Activity Relationship
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    Single-nutrient microbial competition: qualitative agreement between experimental and theoretically forecast outcomes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-28
    Description: When microbial strains compete for the same limiting nutrient in continuous culture, resource-based competition theory predicts that only one strain will survive and all others will die out. The surviving strain expected from theory will be the one with the smallest subsistence or "break-even" concentration of the limiting resource, a concentration defined by the J parameter. This prediction has been confirmed in the case of auxotrophic bacterial strains competing for limiting tryptophan. Because the value of J can be measured on the strains grown alone, the theory can predict the qualitative outcomes of mixed-growth competition in advance of actual competition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hansen, S R -- Hubbell, S P -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1491-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6767274" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*growth & development ; Culture Media ; Drug Resistance, Microbial ; Escherichia coli/growth & development ; Kinetics ; Models, Theoretical ; Nalidixic Acid/pharmacology ; Nutritional Physiological Phenomena ; Pseudomonas aeruginosa/growth & development ; Tryptophan/metabolism
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    Identical twins reared apart (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1323-5, 1327-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188816" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Environment ; Female ; Genetics, Medical ; Humans ; Intelligence ; Male ; Pregnancy ; Twins/*psychology ; Twins, Monozygotic/*psychology
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    Olfactory sensitivity in humans: genetic versus environmental control (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-09
    Description: Olfactory sensitivity to acetic acid, isobutyric acid, and 2-sec-butyl-cyclohexanone was tested in 97 adult male twin pairs to determine the extent to which variation in odor perception was genetically determined. Analysis of the data revealed no evidence for heritability of olfactory sensitivity. However, factors significantly associated with odor perception included cigar, pipe, and cigarette smoking; body fatness; alcohol consumption; and diabetes mellitus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hubert, H B -- Fabsitz, R R -- Feinleib, M -- Brown, K S -- New York, N.Y. -- Science. 1980 May 9;208(4444):607-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189296" target="_blank"〉PubMed〈/a〉
    Keywords: Acetates ; Adult ; Alcohol Drinking ; Butyrates ; Cyclohexanones ; *Environment ; Female ; *Genes ; Humans ; Male ; Middle Aged ; Pregnancy ; Sensory Thresholds ; Skinfold Thickness ; Smell/*physiology ; Smoking ; *Twins ; Twins, Dizygotic ; Twins, Monozygotic
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    Transporting renal epithelium: culture in hormonally defined serum-free medium (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-21
    Description: A hormonally defined medium was used to isolate a homogeneous epithelioid cell population from canine kidney. Monolayers of these cells form domes, an indication of active ion transport, and this process is inhibited by ouabain. This technique allows the isolation of primary cultures of renal epithelial cells, free of fibroblasts, for the characterization of biochemical and physiological properties related to renal function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jefferson, D M -- Cobb, M H -- Gennaro, J F Jr -- Scott, W N -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):912-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434005" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport, Active ; Cell Adhesion ; Cells, Cultured ; Culture Media ; Dogs ; Epithelium/metabolism ; Female ; Kidney/*cytology ; Male ; Sodium/metabolism
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    Dorsal root ganglion neurons are destroyed by exposure in utero to maternal antibody to nerve growth factor (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-21
    Description: Rats and guinea pigs, when immunized with mouse nerve growth factor, produce antibodies that cross-react with their own nerve growth factor. The antibodies reach developing offspring of these animals both prenatally (rats and guinea pigs) and postnatally (rats). Depriving the fetus of nerve growth factor in this way results in the destruction of up to 85 percent of dorsal root ganglion neurons as well as destruction of sympathetic neurons. Sensory neurons of placodal origin in the nodose ganglion were not affected. These data demonstrate that dorsal root ganglion neurons go through a phase of nerve growth factor dependence in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnson, E M Jr -- Gorin, P D -- Brandeis, L D -- Pearson, J -- HD12260/HD/NICHD NIH HHS/ -- HL20604/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):916-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7192014" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Female ; Ganglia, Spinal/cytology/*embryology/growth & development ; Guinea Pigs ; Lactation ; Maternal-Fetal Exchange ; Milk/immunology ; Nerve Growth Factors/*immunology ; Pregnancy ; Rats
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    Maternal glucocorticoid hormones influence neurotransmitter phenotypic expression in embryos (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-31
    Description: Treatment of pregnant rats with reserpine prevented the normal disappearance of catecholamine fluorescence in presumptive neuroblasts of the embryonic gut. These cells normally express the noradrenergic phenotype transiently during embryonic development. The effect of reserpine was reproduced by treating mothers with hydrocortisone acetate. Moreover, the reserpine effect was blocked by treatment with dexamethasone, which inhibits the stress-induced increase in plasma glucocorticoids, and by mitotone, which causes adrenocortical cytolysis. It is concluded that reserpine, through the mediation of maternal glucocorticoid hormones, alters the phenotypic expression of these embryonic neuroblasts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jonakait, G M -- Bohn, M C -- Black, I B -- HD 12108/HD/NICHD NIH HHS/ -- NS 06400/NS/NINDS NIH HHS/ -- NS 10259/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423206" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Catecholamines/metabolism ; Female ; Hydrocortisone/*pharmacology ; Intestines/*embryology/innervation ; Maternal-Fetal Exchange ; Pregnancy ; Pregnancy, Animal/*drug effects ; Rats ; Reserpine/*pharmacology ; Sympathetic Nervous System/*embryology
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    High-molecular-weight immunoreactive beta-endorphin in extracts of human placenta is a fragment of immunoglobulin G (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-11
    Description: A high-molecular-weight protein with beta-endorphin- and adrenocorticotropin-immunoreactivities was isolated from extracts of human placenta after several purification steps, including immunoadsorption with a well-characterized antiserum raised to beta-endorphin. This protein was identified as the heavy chain of the human immunoglobulin class IgG1. These results have led to the recognition of homologies in the amino acid sequences of these physiologically unrelated molecules. They also suggest caution in accepting immunological competence as the sole criterion of the chemical identity of a ligand.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Julliard, J H -- Shibasaki, T -- Ling, N -- Guillemin, R -- New York, N.Y. -- Science. 1980 Apr 11;208(4440):183-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6244620" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Electrophoresis, Polyacrylamide Gel ; Endorphins/*analysis ; Female ; Humans ; Immunoglobulin G/*analysis ; Placental Extracts/*analysis ; Pregnancy ; Radioimmunoassay ; beta-Endorphin
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    Allele increasing susceptibility to human breast cancer may be linked to the glutamate-pyruvate transaminase locus (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-25
    Description: The patterns of the occurrence of breast cancer in 11 high-risk families were evaluated by segregation and linkage analysis. These patterns were consistent with the hypothesis that increased susceptibility to breast cancer was inherited as an autosomal dominant allele with high penetrance in women. The postulated susceptibility allele in these families may be chromosomally linked to the glutamate-pyruvate transaminase (E.C. 2.6.1.2, alanine aminotransferase) locus. Confirmation of this linkage in other families would establish the existence of a gene increasing susceptibility to breast cancer. Since there is no association in the general population between a woman's glutamate-pyruvate transaminase genotype and her cancer risk, the glutamate-pyruvate transaminase linkage cannot be used as a screening test for breast cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉King, M C -- Go, R C -- Elston, R C -- Lynch, H T -- Petrakis, N L -- New York, N.Y. -- Science. 1980 Apr 25;208(4442):406-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367867" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine Transaminase/*genetics ; Alleles ; Breast Neoplasms/*genetics/transmission ; Female ; Genes ; Genetic Linkage ; Humans ; Pedigree ; X Chromosome
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    How safe is Bendectin? (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):518-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423201" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced/*etiology ; Dicyclomine ; Doxylamine/*adverse effects ; Drug Combinations/adverse effects ; Drug Evaluation ; Female ; Humans ; Jurisprudence ; Pregnancy ; Pyridines/*adverse effects ; Pyridoxine/*adverse effects ; United States ; United States Food and Drug Administration
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    Prenatal diagnosis fo neural tube defects (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1216-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6157193" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Therapeutic/standards ; Female ; Genetic Diseases, Inborn ; Government Regulation ; Great Britain ; Humans ; Neural Tube Defects/*diagnosis ; Pregnancy ; *Pregnant Women ; *Prenatal Diagnosis ; Reagent Kits, Diagnostic ; Social Justice ; Spina Bifida Occulta/diagnosis ; United States ; Voluntary Programs ; alpha-Fetoproteins/analysis
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    Tooth induction in chick epithelium: expression of quiescent genes for enamel synthesis (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-29
    Description: Intraocular grafts of chick epithelium combined with mouse molar mesenchyme produced a variety of dental structures including perfectly formed crowns with differentiated ameloblasts depositing enamel matrix. The results suggest that the loss of teeth in Aves did not result from a loss of genetic coding for enamel synthesis in the oral epithelium but from an alteration in the tissue interactions requisite for odontogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kollar, E J -- Fisher, C -- New York, N.Y. -- Science. 1980 Feb 29;207(4434):993-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352302" target="_blank"〉PubMed〈/a〉
    Keywords: *Amelogenesis ; Animals ; Chick Embryo/*cytology ; Culture Techniques ; Dental Enamel Proteins/*biosynthesis/genetics ; Embryonic Induction ; Epithelial Cells ; Genes ; Mandible/cytology ; Mesoderm/cytology ; Mice ; *Odontogenesis
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    Prolongation of islet xenograft survival without continuous immunosuppression (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-11
    Description: The survival of isolated rat islets transplanted into diabetic mice was prolonged markedly by maintaining the rat islets in vitro at 24 degrees C for 7 days before transplantation and administering to the recipients a single injection of antiserum to mouse and rat lymphocytes shortly before transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lacy, P E -- Davie, J M -- Finke, E H -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):283-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6770465" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/analysis ; Cell Survival ; Cells, Cultured ; Diabetes Mellitus, Experimental/*therapy ; *Immunosuppression ; *Islets of Langerhans Transplantation ; Lymphocytes/immunology ; Male ; Mice ; Mice, Inbred BALB C ; Rats ; Transplantation, Heterologous ; Transplantation, Isogeneic
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    Immunoglobulin gene rearrangement in immature B cells (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-19
    Description: Two types of immature B cells, namely fetal liver hybridomas and the leukemic cell line 70Z/3, both of which have cytoplasmic mu chains but no light chains, were examined for DNA rearrangements of their light chain and heavy chain immunoglobulin genes. In the fetal liver hybridomas, which were constructed from fetal liver cells and a tumor cell, no light chain gene rearrangement was observed, whereas in the 70Z/3 cell line a kappa light chain rearrangement probably occurred. The results suggest that, although the lack of light chain synthesis can be due to a lack of gene rearrangement, there may also be transcriptional regulation, which may also be important for the expression of light chain immunoglobulins in immature B cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maki, R -- Kearney, J -- Paige, C -- Tonegawa, S -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1366-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6774416" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*immunology ; Genes ; Hybrid Cells/immunology ; Immunoglobulin Constant Regions/genetics ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Light Chains/*genetics ; Immunoglobulin Variable Region/genetics ; Immunoglobulin kappa-Chains/*genetics ; Immunoglobulin mu-Chains/*genetics ; Leukemia, Experimental/*immunology ; Liver/*embryology ; Mice ; Recombination, Genetic ; Transcription, Genetic
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    Local effect of the blastocyst on estrogen and progesterone receptors in the rat endometrium (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-07
    Description: Nuclear receptors for both estradiol and progesterone were present in twofold higher concentrations in implantation sites than in nonimplantation regions of the endometrium of 6-day pregnant rats. Decidualization in the absence of an embryo was not accompanied by a similar increase in the concentration of nuclear receptors. Moreover, this difference in receptor distribution between the implantation and nonimplantation areas persisted when a major part of the maternal supply of sex steroids was suppressed by ovariectomy on day 5 of pregnancy. These results support the hypothesis that steroids originating from the embryo affect the endometrial implantation site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Logeat, F -- Sartor, P -- Hai, M T -- Milgrom, E -- New York, N.Y. -- Science. 1980 Mar 7;207(4435):1083-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355273" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blastocyst/*metabolism ; Castration ; Cell Nucleus/metabolism ; Decidua/metabolism ; Endometrium/*metabolism/ultrastructure ; Female ; Gestational Age ; Pregnancy ; Pseudopregnancy ; Rats ; Receptors, Estrogen/*metabolism ; Receptors, Progesterone/*metabolism
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    Selective inhibition of glycoprotein and membrane protein of vesicular stomatitis virus from interferon-treated cells (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-01
    Description: A 200-fold inhibition in the titer of infectious vesicular stomatitis virus (VSV) was produced in cultures of Ly cells treated with 30 reference units of interferon per milliliter. Virus particle production, as measured by VSV particle-associated transcriptase, or nucleocapsid protein was inhibited by a maximum of tenfold. The glycoprotein and membrane protein content was reduced in VSV derived from interferon-treated cells. Thus interferon-treated cells may have produced VSV particles with low infectivity, which may be related to the reduced amount of glycoprotein incorporated into such particles. These findings resemble those reported in interferon-treated cells infected with murine leukemia viruses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maheshwari, R K -- Jay, F T -- Friedman, R M -- New York, N.Y. -- Science. 1980 Feb 1;207(4430):540-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243416" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Defective Viruses/growth & development ; Glycoproteins/*biosynthesis ; Interferons/*pharmacology ; Membrane Proteins/*biosynthesis ; Mice ; RNA, Viral/metabolism ; Vesicular stomatitis Indiana virus/*growth & development ; Viral Proteins/*biosynthesis ; Virus Replication/*drug effects
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    (-)Pentobarbital opens ion channels of long duration in cultured mouse spinal neurons (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: Intracellular recordings from voltage-clamped mouse spinal neurons in tissue culture were used to study the membrane mechanisms underlying inhibitory responses to gamma-aminobutyric acid and the (-) isomer of pentobarbital. Fluctuation analysis suggested that both substances activated ion channels in the membranes. However, the channels activated by pentobarbital remained open five times longer than those activated by gamma-aminobutyric acid.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mathers, D A -- Barker, J L -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):507-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6248961" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/drug effects/physiology ; Cells, Cultured ; Ion Channels/drug effects/*physiology ; Membrane Potentials/drug effects ; Mice ; Neurons/drug effects/*physiology ; Pentobarbital/*pharmacology ; Spinal Cord/*physiology ; gamma-Aminobutyric Acid/pharmacology
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  • 73
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    The heart is a target organ for androgen (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-15
    Description: Autoradiographic and biochemical analyses of the hearts of female rhesus monkeys and baboons indicate that atrial and ventricular myocardial cells contain androgen receptors. Although the specific effects of nuclear uptake and retention of androgen on the function of heart muscle cells are not known, the presence of this receptor suggests that sex steroid hormones may affect myocardial function directly and may explain some of the peculiar differences in heart disease between men and women.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGill, H C Jr -- Anselmo, V C -- Buchanan, J M -- Sheridan, P J -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6766222" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/*metabolism ; Animals ; Coronary Disease/*etiology ; Dihydrotestosterone/metabolism ; Estradiol/metabolism ; Female ; Haplorhini ; Kinetics ; Macaca mulatta ; Myocardium/*metabolism ; Papio ; Receptors, Androgen/*metabolism ; Receptors, Steroid/*metabolism ; Sex Factors
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  • 74
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    Cellular senescence in a cloned strain of bovine fetal aortic endothelial cells (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-22
    Description: The life-span in vitro and other proliferative characteristics of a strain of endothelial cells cloned from the aorta of a fetal calf were examined. Cultures of these cells had a replicative life-span of approximately 80 cumulative population doublings. Growth rates in the logarithmic phase and plateau densities decreased as the cumulative population-doubling level increased. After approximately 65 percent of the life-span of a culture was completed, the percentage of cells that incorporated [3H]thymidine during a 24-hour labeling period began to decrease rapidly. The cells expressed factor VIII antigen and their intercellular borders were stainable with silver nitrate throughout the life-span of each culture. Average cellular attachment size increased more than threefold between cumulative population-doubling levels 41 and 80. The facility with which cloned strains of endothelial cells can be isolated should encourage further exploitation of this important cell culture model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mueller, S N -- Rosen, E M -- Levine, E M -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):889-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355268" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/cytology/embryology ; Cattle ; Cell Division ; *Cell Survival ; Cells, Cultured ; Clone Cells/*physiology ; Endothelium/*cytology ; Karyotyping
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    Expression of a bacterial gene in mammalian cells (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-19
    Description: Transfection of cultured monkey kidney cells with recombinant DNA constructed with a cloned Escherichia coli gene that codes for xanthine-guanine phosphoribosyltransferase and several different SV40 DNA-based vectors, results in the synthesis of readily measurable quantities of the bacterial enzyme. Moreover, the physiological defect in purine nucleotide synthesis characteristic of human Lesch-Nyhan cells can be overcome by the introduction of the bacterial gene into these cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mulligan, R C -- Berg, P -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1422-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251549" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cloning, Molecular/methods ; DNA, Bacterial/*genetics ; *DNA, Recombinant ; Escherichia coli ; *Genes ; Haplorhini ; Humans ; Hypoxanthine Phosphoribosyltransferase/genetics ; Lesch-Nyhan Syndrome/*genetics ; Pentosyltransferases/*genetics ; Simian virus 40/genetics ; Transduction, Genetic ; Transformation, Genetic
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    Intercellular adhesion: coconstruction of contractile heart tissue by cells of different species (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-06
    Description: Dissociated embryonic rat myocardial cells and chick myocardial cells labeled with radioactive isotope coaggregate and establish intercellular junctions. These bispecific cells reconstruct synchronously beating myocardial tissue within 24 hours of culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Cheng, M -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1150-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; *Cell Aggregation ; Cells, Cultured ; Chickens ; Heart/*embryology ; Intercellular Junctions/ultrastructure ; Mosaicism ; Myocardial Contraction ; Myocardium/*cytology ; Rats ; Species Specificity
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    Cultivation in vitro of the quartan malaria parasite Plasmodium inui (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-12
    Description: The simian guartan malaria parasite Plasmodium inui (OS strain) was cultured in a continuous flow system with rhesus monkey erythrocytes and RPMI 1640nmedium supplemented with Hepes buffer and rhesus serum. Over a 10-week period, the growth of the parasite permitted a 61,000-fold cumulative dilution of the original inoculum. After 5 weeks in culture, the parasites were still infective to the monkey Saimiri sciureus and to Anopheles freeborni mosquitoes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nguyen-Dinh, P -- Campbell, C C -- Collins, W E -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1249-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6773146" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Erythrocytes/*parasitology ; Haplorhini/*parasitology ; Larva ; Macaca/*parasitology ; Plasmodium/cytology/*growth & development
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    J genes for heavy chain immunoglobulins of mouse (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-05
    Description: A 15,8-kilobase pair fragment of BALB/c mouse liver DNA, cloned in the Charon 4A lambda phage vector system, was shown to contain the mu heavy chain constant region (CHmu) gene for the mouse immunoglobulin M. In addition, this fragment of DNA contains at least two J genes, used to code for the carboxyl terminal portion of heavy chain variable regions. These genes are located in genomic DNA about eight kilobase pairs to the 5' side of the CHmu gene. The complete nucleotide sequence of a 1120-base pair stretch of DNA that includes the two J genes has been determined.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newell, N -- Richards, J E -- Tucker, P W -- Blattner, F R -- New York, N.Y. -- Science. 1980 Sep 5;209(4461):1128-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250219" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites, Antibody/*genetics ; DNA Restriction Enzymes ; DNA, Recombinant ; Genes ; Genetic Linkage ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Variable Region/*genetics ; Immunoglobulin mu-Chains/*genetics ; Mice
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    Gene affecting superoxide dismutase activity linked to the histocompatibility complex in H-2 congenic mice (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-04
    Description: The activity of cyanide-sensitive, Cu-Zn superoxide dismutase (SOD) was studied in liver sytosols from H-2 congenic strains of mice. Higher SOD activity was found in livers of mice having H-2b/A.BY, B10, and C3H.SW/haplotypes than in those of H-2a, H-2k and H-2d haplotypes. Segregation studies supported these correlations. In H-2 recombinant strains of mice, the genes influencing the liver SOD activity occur, as ascertained by mapping techniques, at or near the H-2d region of the major histocompatibility complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novak, R -- Bosze, Z -- Matkovics, B -- Fachet, J -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):86-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Genes ; Genes, Regulator ; Genetic Linkage ; H-2 Antigens/*genetics ; Liver/enzymology ; *Major Histocompatibility Complex ; Mice ; Superoxide Dismutase/*genetics
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  • 80
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    Calcium regulation during stimulus-secretion coupling: continuous measurement of intracellular calcium activities (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-25
    Description: Accurate measurements of intracellular calcium activities in salivary gland epithelial cells of the insect Phormia regina were obtained with microelectrodes in which N,N'-di(11-ethoxycarbonyl)undecyl-N,N'-4,5-tetramethyl-3,6-dioxaoctane diacid diamide wsa incorporated in a liquid membrane system. When calibrated in solutions approximating the ionic concentration of the cell interior, these microelectrodes gave rapid stable responses that were linear functions of the logarithm of calcium activities and were not affected by potassium, sodium and magnesium. Continuous monitoring of calcium activities during serotonin-induced saliva release provided direct evidence of hormonal influence on transmembrane calcium movement and spontaneous regulation of intracellular calcium by stimulated cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, J -- Youmans, S J -- Armstrong, W M -- Stark, R J -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):510-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394518" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Diptera/*metabolism ; Epithelium/metabolism ; Kinetics ; Magnesium/pharmacology ; Microelectrodes ; Salivary Glands/drug effects/*metabolism ; Serotonin/pharmacology
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    Human monoclonal antibody against Forssman antigen (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-10-31
    Description: Hybrid cells formed between human lymphocytes and mouse myeloma cells produce human immunoglobulin in culture. Stable antibody-producing cell lines can be isolated after multiple cycles of low-density passage, cloning, and continued selection for immunoglobulin production. The origin and characteristics of a hybrid of human and mouse cells is described. This hybrid produces high concentrations (8.3 micrograms per milliliter) of human immunoglobulin M reactive with the terminal disaccharide of the Forssman glycolipid. These findings point to the potential use of human-mouse hybrid cells as a source of human monoclonal antibodies for therapeutic and diagnostic purposes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nowinski, R -- Berglund, C -- Lane, J -- Lostrom, M -- Bernstein, I -- Young, W -- Hakomori, S I -- Hill, L -- Cooney, M -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):537-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423202" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Antibody Formation ; Antibody Specificity ; Cells, Cultured ; Clone Cells/immunology ; *Forssman Antigen ; Humans ; Hybrid Cells/immunology ; Immunoglobulin M/biosynthesis ; Mice
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  • 82
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    alpha-Lactalbumin-casein induction in virgin mouse mammary explants: dose-dependent differential action of cortisol (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-21
    Description: The interplay of insulin, cortisol, and prolactin induces synthesis of casein and alpha-lactalbumin in cultured mammary explants from mature virgin mice. A striking difference has been found between the optimal concentrations of cortisol required for maximal induction of the two milk proteins in vitro: 3 x 10(-8) molar for alpha-lactalbumin and 3 x 10(-6) molar for casein. Moreover, 10(-7) to 10(-5) molar cortisol caused progressive inhibition of alpha-lactalbumin accumulation. Such differential actions of cortisol may partly account for the asynchronous synthesis of the two proteins during pregnancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ono, M -- Oka, T -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1367-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6986657" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caseins/*biosynthesis ; Dose-Response Relationship, Drug ; Drug Interactions ; Female ; Hydrocortisone/*pharmacology ; Insulin/pharmacology ; Lactalbumin/*biosynthesis ; Mammary Glands, Animal/drug effects/*metabolism ; Mice ; Organ Culture Techniques ; Pregnancy ; Prolactin/pharmacology
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  • 83
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    Inverse relation between low-density lipoprotein-cholesterol and dehydroisoandrosterone sulfate in human fetal plasma (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-02
    Description: A striking inverse correlation was found in umbilical cord plasma between the concentrations of dehydroisoandrosterone sulfate and low-density lipoprotein (LDL)-cholesterol but not high-density lipoprotein-cholesterol or very low density lipoprotein-cholesterol. Dehydroisoandrosterone sulfate is a major secretory product of the human fetal adrenal and the principal precursor of placental estrogen production. The data suggest that the concentrations for LDL-cholesterol in fetal plasma are influenced by the rate of utilization of LDL-cholesterol by the fetal adrenal for steroidogenesis and are not necessarily related to a genetic predisposition for hypercholesterolemia or other lipoprotein disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parker, C R Jr -- Simpson, E R -- Bilheimer, D W -- Leveno, K -- Carr, B R -- MacDonald, P C -- New York, N.Y. -- Science. 1980 May 2;208(4443):512-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6445079" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/metabolism ; Adrenal Cortex Hormones/secretion ; Cholesterol/*blood ; Dehydroepiandrosterone/*analogs & derivatives/blood/metabolism ; Dehydroepiandrosterone Sulfate ; Female ; Fetal Blood/*analysis ; Humans ; Hypertension/metabolism ; Lipoproteins, LDL/*blood/metabolism ; Maternal-Fetal Exchange ; Pregnancy ; Pregnancy Complications, Cardiovascular/metabolism
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    Isolation of mutants of an animal virus in bacteria (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-19
    Description: Mutants of animal viruses can be isolated in bacteria by recombinant DNA methods. Since no viral functions are required for propagation of recombinants in bacteria, viral mutants with lethal changes in cis- or trans-acting elements can be isolated, as well as partially or conditionally defective mutants. In the cases of viruses with small DNA genomes, such as the tumorigenic simian virus 40 (SV40), the entire viral DNA can be inserted into the bacterial plasmid pBR322 and cloned in Escherichia coli. Recombinant plasmids with a single copy of SV40 DNA cause morphological transformation of mouse cells in culture with the same efficiency as SV40 DNA isolated from virus-infected monkey cells, but the recombinant DNA is noninfectious and replicates poorly in permissive cells. However, SV40 DNA excised from the plasmid replicates as well as authentic viral DNA and is fully infectious. SV40 mutants with small deletions or base substitutions have been isolated by in vitro site-specific or random local mutagenesis of recombinant DNA followed by cloning in E. coli. Many of the mutants thus isolated are defective in specific viral functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peden, K W -- Pipas, J M -- Pearson-White, S -- Nathans, D -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1392-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251547" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*genetics ; Antigens, Viral/genetics ; Cell Transformation, Viral ; Cells, Cultured ; Chromosome Deletion ; DNA, Recombinant ; DNA, Viral/*genetics ; Escherichia coli ; *Mutation ; Simian virus 40/*genetics ; Viral Proteins/*genetics ; Virus Replication
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    Altering genotype and phenotype by DNA-mediated gene transfer (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: Transformation, or DNA-mediated gene transfer, permits the introduction of new genetic information into a cell and frequently results in a change in phenotype. The transforming DNA is ultimately integrated into a recipient cell chromosome. No unique chromosomal locations are apparent, different lines contain the transforming DNA on different chromosomes. Expression of transformed genes frequently results in the synthesis of new polypeptide products which restore appropriate mutant cells to the wild-type phenotype. Thus transformation provides an in vivo assay for the functional role of DNA sequence organization about specific genes. Transforming genes coding for selectable functions, such as adenine phosphoribosyltransferase or thymidine kinase, have now been isolated by utilizing transformation in concert with molecular cloning. Finally, transformation may provide a general approach to the analysis of complex heritable phenotypes by permitting the distinction between phenotypic changes without concomitant changes in DNA and functional genetic rearrangements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pellicer, A -- Robins, D -- Wold, B -- Sweet, R -- Jackson, J -- Lowy, I -- Roberts, J M -- Sim, G K -- Silverstein, S -- Axel, R -- CA 16346/CA/NCI NIH HHS/ -- CA 17477/CA/NCI NIH HHS/ -- CA 23767/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1414-22.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414320" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Phosphoribosyltransferase/*genetics ; Cloning, Molecular/methods ; DNA/*genetics ; *DNA, Recombinant ; Genes ; Genotype ; Mutation ; Pentosyltransferases/*genetics ; Phenotype ; Recombination, Genetic ; Selection, Genetic ; Thymidine Kinase/*genetics ; *Transformation, Genetic
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  • 86
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    "Transdifferentiation" of C6 glial cells in culture (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-11
    Description: The activities of cyclic nucleotide phosphohydrolase, an enzyme marker for oligodendrocytes, and glutamine synthetase, an enzyme marker for astrocytes, were studied at early (21 to 26) and late (82 to 88) cell passages. The activity of cyclic nucleotide phosphohydrolase was markedly high and that of glutamine synthetase was low in the early passages, but this relation was reversed in the late passages. These findings suggest a "transdifferentiation" of C6 glial cells with passage in culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parker, K K -- Norenberg, M D -- Vernadakis, A -- New York, N.Y. -- Science. 1980 Apr 11;208(4440):179-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6102413" target="_blank"〉PubMed〈/a〉
    Keywords: 2',3'-Cyclic-Nucleotide Phosphodiesterases/metabolism ; Animals ; Astrocytes/enzymology ; *Cell Differentiation ; Cells, Cultured ; Glutamate-Ammonia Ligase/metabolism ; Neuroglia/*enzymology ; Oligodendroglia/enzymology ; Rats
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  • 87
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    Nerve terminals are as metabolically different as the muscle fibers they innervate (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-21
    Description: The rate at which glucose enters nerve terminals in muscle was estimated indirectly by measuring changes in miniature end-plate potential frequency D-Glucose entered nerve terminals in muscles with a fast twitch more rapidly than it entered those with a slow twitch. This suggests that nerve terminals in fast- and slow-twitch muscles differ in their rate of metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pickett, J B -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):927-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Diaphragm/innervation ; Glucose/*metabolism ; Kinetics ; Membrane Potentials ; Nerve Endings/*metabolism ; Neuromuscular Junction/*metabolism ; Osmolar Concentration ; Rats
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  • 88
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    Cells isolated from the embryonic neural retina differ in behavior in vitro and membrane structure (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-29
    Description: Several subpopulations of cells were isolated from trypsin-dissociated embryonic (14 days) chick retinas. The cells of each subpopulation differed in associative behavior measured by cell aggregation and stationary culture assays and in glycoproteins that contain glucosamine. Freeze-fracture analysis showed that these populations also differed in intramembrane particle content.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sheffield, J B -- Pressman, D -- Lynch, M -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1043-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403867" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; Cell Fractionation/methods ; Cell Membrane/ultrastructure ; Cells, Cultured ; Chick Embryo ; Membrane Proteins/metabolism ; Retina/cytology/*embryology
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  • 89
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    Making interferon: gains come slowly (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):618.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159683" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Drug Industry ; Fibroblasts/metabolism ; Humans ; Interferons/*biosynthesis ; Male ; National Institutes of Health (U.S.) ; Research Support as Topic ; United States
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  • 90
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    Regional assignment of genes for human esterase D and retinoblastoma to chromosome band 13q14 (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: The expression of human esterase D was evaluated quantitatively and qualitatively in five persons with partial deletions or duplications of chromosome 13. The results showed that the locus of this enzyme is at band 13q14. Deletion of this same band in other subjects has been found previously to indicate a predisposition to the development of retinoblastoma, which was present in the four individuals in this study who had partial deletions of chromosome 13. Because of this close synteny, esterase D evaluation should aid in the diagnosis and genetic counseling of retinoblastoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sparkes, R S -- Sparkes, M C -- Wilson, M G -- Towner, J W -- Benedict, W -- Murphree, A L -- Yunis, J J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1042-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375916" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Deletion ; Chromosome Mapping ; *Chromosomes, Human, 13-15 ; Esterases/*genetics ; Female ; Genes ; Humans ; Intellectual Disability/enzymology/genetics ; Male ; Retinoblastoma/enzymology/*genetics
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  • 91
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    Directed deletion of a yeast transfer RNA intervening sequence (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: Many eukaryotic genes contain intevening sequences, segments of DNA that interrupt the continuity of the gene. They are removed from RNA transcripts of the gene by a process known as splicing. The intervening sequence in a yeast tyrosine transfer RNA (tRNA Tyr) suppressor gene was deleted in order to test its role in the expression of the gene. The altered gene and its parent were introduced into yeast by transformation. Both genes exhibited suppressor function, showing that the intervening sequence is not absolutely essential for the expression of this gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, R B -- Johnson, P F -- Tanaka, S -- Schold, M -- Itakura, K -- Abelson, J -- CA10984/CA/NCI NIH HHS/ -- GM 26391/GM/NIGMS NIH HHS/ -- GM 35658/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1396-400.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6997991" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosome Deletion ; DNA, Recombinant ; Genes ; Mutation ; Nucleic Acid Precursors/genetics ; Plasmids ; RNA, Fungal/*genetics ; RNA, Transfer/*genetics ; Saccharomyces cerevisiae/genetics ; Suppression, Genetic ; Tyrosine
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  • 92
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    Pituitary gonadotropin-releasing hormone receptors during the rat estrous cycle (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-22
    Description: The binding of [6-alanine]gonadotropin-releasing hormone to pituitary plasma membranes increased threefold between metestrus and early proestrus in female rats. Receptor numbers fell rapidly on the afternoon of proestrus coincident with the preovulatory gonadotropin surge. The numbers of receptors for gonadotropin-releasing hormone were positively correlated with concentrations of estradiol in serum; this pattern may be a necessary component of increased pituitary sensitivty to gonadotropin-releasing hormone observed during proestrus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savoy-Moore, R T -- Schwartz, N B -- Duncan, J A -- Marshall, J C -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):942-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; Estradiol/blood ; *Estrus ; Feedback ; Female ; Follicle Stimulating Hormone/blood ; Gonadotropin-Releasing Hormone/analogs & derivatives/*metabolism ; Kinetics ; Luteinizing Hormone/blood ; Pituitary Gland, Anterior/*metabolism ; Pregnancy ; Progesterone/blood ; Rats ; Receptors, Cell Surface/*metabolism
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  • 93
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    Aspirin: an unexpected side effect on prostacyclin synthesis in cultured vascular smooth muscle cells (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-11-07
    Description: Monolayer cultures of rat aorta smooth muscle cells synthesized the anti-aggregatory substance prostacyclin via the cyclooxygenase pathway from 14C-labeled arachidonic acid. The product was identified both by bioassay and by mass spectrometry. Labeled cells produced prostacyclin only when exposed to the initiator thrombin: treatment with therapeutic concentrations of aspirin (0.2 millimolar) for 30 minutes completely destroyed the cells' ability to synthesize prostacyclin. Prostacyclin synthesis from exogenous arachidonic acid recovered fully within 1 to 2 hours by a cycloheximide-sensitive process. Thrombin responsivness, which was permanently impaired in confluent nondividing cultures, recovered substantially and within 24 hours only when cells were stimulated to divide by subculturing. These results indicate that resting vascular cells can rapidly synthesize new cyclooxygenase, but that aspirin destroys additional components of the prostacyclin system which can only be replaced during cell division.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Whiting, J -- Salata, K -- Bailey, J M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):663-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6776627" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/*drug effects ; Arachidonic Acids/metabolism ; Aspirin/*pharmacology ; Cells, Cultured ; Cyclooxygenase Inhibitors ; Epoprostenol/*biosynthesis ; Muscle, Smooth/drug effects ; Prostaglandins/*biosynthesis ; Rats ; Thrombin/pharmacology
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  • 94
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    Genotoxicity of the antihypertensive drugs hydralazine and dihydralazine (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-17
    Description: The genotoxicity of the antihypertensive agents hydralazine and dihydralazine was tested in mammalian cells and bacteria. Both drugs elicited DNA repair in rat hepatocyte primary cultures. In the Ames test, both with and without an S-9 fraction, hydralazine was mutagenic in strains TA100 and TA1537, whereas dihydralazine was weakly mutagenic in strain TA1537. These findings support the observation that hydralazine is carcinogenic in mice. The carcinogenicity of many chemicals results from interaction with DNA. Since these studies demonstrate that hydralazine and dihydralazine damage DNA in mammalian cells, these drugs should be viewed as potential human carcinogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, G M -- Mazue, G -- McQueen, C A -- Shimada, T -- N 01-CP-55705/CP/NCI NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):329-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423193" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Biotransformation ; *Carcinogens ; Cells, Cultured ; DNA Repair/*drug effects ; Dihydralazine/*toxicity ; Dose-Response Relationship, Drug ; Drug Evaluation, Preclinical ; Hydralazine/*analogs & derivatives/*toxicity ; Liver/metabolism ; *Mutagens ; Rats ; Salmonella typhi/drug effects
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  • 95
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    Human rotavirus type 2: cultivation in vitro (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-11
    Description: A strain of type 2 human rotavirus (Wa) was grown to relatively high titer through 14 passages in primary cultures of African green monkey kidney (AGMK) cells. This passage series was initiated with virus that had been passaged 11 times serially in newborn gnotobiotic piglets. In contrast, virus present in the stool of patient Wa as well as virus from the first, second, or third passage in piglets could not be propagated successfully in African green monkey kidney cells. Prior to each passage in cell culture, the virus was treated with trypsin and the inoculated cultures were centrifuged at low speed. Cultivation of a type 2 human rotavirus should aid attempts to characterize this virus and to develop a means of immunoprophylaxis for a serious diarrheal disease of human infants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wyatt, R G -- James, W D -- Bohl, E H -- Theil, K W -- Saif, L J -- Kalica, A R -- Greenberg, H B -- Kapikian, A Z -- Chanock, R M -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):189-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243190" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Viral/analysis ; Cells, Cultured ; Diarrhea, Infantile/microbiology ; Germ-Free Life ; Haplorhini ; Humans ; Infant ; RNA Viruses/*growth & development ; Rotavirus/*growth & development/immunology ; Swine
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  • 96
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    Genetic studies of an acardiac monster: evidence of polar body twinning in man (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-14
    Description: Two maternally derived chromosome sets and both maternal histocompatibility antigen haplotypes were identified in the tissues of a malformed triploid acardiac twin that developed within the same chorion as its normal twin. These findings indicate that the twins arose as a result of independent fertilizations, by two different spermatozoa, of a normal haploid ovum and its diploid first-meiotic-division polar body.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bieber, F R -- Nance, W E -- Morton, C C -- Brown, J A -- Redwine, F O -- Jordan, R L -- Mohanakumar, T -- New York, N.Y. -- Science. 1981 Aug 14;213(4509):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7196086" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Severe Teratoid/*genetics ; Female ; Fertilization ; HLA Antigens/genetics ; Heart Defects, Congenital/*genetics ; Humans ; Infant, Newborn ; Karyotyping ; Male ; Meiosis ; Polyploidy ; Pregnancy ; *Twins
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  • 97
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    Cattle breeding (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1981 May 8;212(4495):610.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7194507" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cattle ; *Embryo Transfer ; Female ; Humans ; Pregnancy
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  • 98
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    Familial studies of intelligence: a review (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-29
    Description: A summary of 111 studies identified in a survey of the world literature on familial resemblances in measured intelligence reveals a profile of average correlations consistent with a polygenic mode of inheritance. There is, however, a marked degree of heterogeneity of the correlations within familial groupings, which is not moderated by sex of familial pairing or by type of intelligence test used.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bouchard, T J Jr -- McGue, M -- 5 T32 MH14647/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 May 29;212(4498):1055-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7195071" target="_blank"〉PubMed〈/a〉
    Keywords: *Family ; Female ; *Genetics, Medical ; Humans ; *Intelligence ; Intelligence Tests ; Male ; Pregnancy ; Sex Factors ; Twins
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  • 99
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    Rheumatoid factor-like immunoglobulin M protects previously uninfected rat pups and dams from Trypanosoma lewisi (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-09
    Description: The serum of lactating rats that have never been infected with the protozoan parasite Trypanosoma lewisi contains a rheumatoid factor-like immunoglobulin M (IgM). This IgM amplifies a specific immunoglobulin G (IgG) response to the parasite and accounts for the unusual resistance of previously uninfected lactating rats and their suckling pups to infection with T. lewisi. A similar rheumatoid factor-like IgM, which is induced late in the usual course of infection with T. lewisi in nonlactating rats, amplifies an earlier IgM response and terminates the infection. To our knowledge, this is the first description of a rheumatoid factor, which is classified as an autoimmune antibody, acting in a protective manner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clarkson, A B Jr -- Mellow, G H -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):186-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7025211" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Suckling/immunology ; Antigen-Antibody Complex ; Female ; Immunoglobulin G ; Immunoglobulin M/*immunology ; *Lactation ; Pregnancy ; Rats ; Rheumatoid Factor/*immunology ; Trypanosoma lewisi/immunology ; Trypanosomiasis/*immunology
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  • 100
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    The major histocompatibility complex in man (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dausset, J -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1469-74.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6792704" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Surface/genetics ; Forecasting ; Genes ; Genes, MHC Class II ; Genetic Linkage ; HLA Antigens/genetics ; Humans ; Immune Tolerance ; Immunity, Cellular ; *Major Histocompatibility Complex ; Polymorphism, Genetic ; Transplantation Immunology
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