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  • Cells, Cultured  (80)
  • Rabbits  (40)
  • American Association for the Advancement of Science (AAAS)  (118)
  • 1980-1984  (118)
  • 1935-1939
  • 1925-1929
  • 1984  (49)
  • 1983  (69)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (118)
  • Springer  (1)
Years
  • 1980-1984  (118)
  • 1935-1939
  • 1925-1929
Year
  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-11-11
    Description: When injected into mice, the synthetic double-stranded polynucleotide poly(inosinic) X poly(cytidylic) acid induces high natural killer (NK) cell activity within 4 to 12 hours. Induction of NK activity in mice immunized 2 or 3 days previously, or the addition of NK cells to cultures immunized in vitro 2 or 3 days previously, promotes early termination of the ongoing primary immunoglobulin M antibody response. A target for NK cells is a population of accessory cells that has interacted with antigen and is necessary for sustaining the antibody response. The inference is strong that NK cells induced normally by immunization also terminate the usual antibody response in vivo by elimination of antigen-exposed accessory cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abruzzo, L V -- Rowley, D A -- 5-T32-CA-09267/CA/NCI NIH HHS/ -- R01-10242/PHS HHS/ -- New York, N.Y. -- Science. 1983 Nov 11;222(4624):581-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6685343" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibody Formation ; Antibody-Producing Cells/immunology ; Cells, Cultured ; Homeostasis ; Killer Cells, Natural/*immunology/radiation effects ; Lymphocyte Cooperation ; Lymphocytes/*immunology ; Mice ; Poly I-C/immunology ; Spleen/immunology
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-04-22
    Description: The human parasite Trypanosoma brucei gambiense grew continuously at 37 degrees C in primary cultures of murine bone marrow. Cultured parasites remained virulent for mice. Rapid parasite growth coincided with the appearance of adherent adipocyte-epitheloid cell aggregates that also promoted hematopoiesis. This culture system should permit studies of host cell control of trypanosome proliferation, pathogenic effects of trypanosomes on blood cell development, and the relative trypanocidal and marrow suppressive activities of drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balber, A E -- CA 14049/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 22;220(4595):421-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836284" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Marrow ; Cells, Cultured ; Culture Media ; Humans ; Mice ; Mice, Inbred BALB C ; Trypanosoma brucei brucei/growth & development ; Trypanosoma brucei gambiense/*growth & development ; Trypanosomiasis, African/parasitology
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  • 3
    Publication Date: 1983-07-01
    Description: Mammalian atrial extracts possess natriuretic and diuretic activity. In experiments reported here it was found that atrial, but not ventricular, extract also causes relaxation of isolated vascular and nonvascular smooth muscle preparations. The smooth muscle relaxant activity of atrial extract was heat-stable and concentration-dependent and could be destroyed with protease. Rabbit aortic and chick rectum strips were used for the detection of atrial biological activity. The atrial activity was separated by column chromatography into two peaks having apparent molecular weights of 20,000 to 30,000 and less than 10,000. The atrial substance that copurified with the smooth muscle relaxant activity in both peaks caused natriuresis when injected into conscious rats. It appears that atria possess at least two peptides that elicit smooth muscle relaxation and natriuresis, suggesting an endogenous system of fluid volume regulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Currie, M G -- Geller, D M -- Cole, B R -- Boylan, J G -- YuSheng, W -- Holmberg, S W -- Needleman, P -- New York, N.Y. -- Science. 1983 Jul 1;221(4605):71-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857267" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Atrial Function ; Chickens ; Chromatography, Gel ; Dogs ; Dose-Response Relationship, Drug ; Humans ; Molecular Weight ; Muscle, Smooth/drug effects ; Muscle, Smooth, Vascular/*drug effects ; Natriuresis/drug effects ; Rabbits ; Rats ; Swine ; Vasodilation/drug effects
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  • 4
    Publication Date: 1983-03-18
    Description: Immunohistochemical techniques were used to confirm biochemical evidence that parenchymal cells isolated from adult rat liver and maintained in nonreplicating monolayer culture for 2 days synthesized type IV basement membrane collagen. On continued incubation in serum-free medium, the hepatocytes also synthesized the interstitial collagens, types I and III. Consistent with these results in culture, type IV collagen was localized to the hepatocytes in slices of pathologic rat liver. Hence collagen formation is a previously unrecognized function of the hepatocyte that may be important in the pathogenesis of liver fibrosis or cirrhosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diegelmann, R F -- Guzelian, P S -- Gay, R -- Gay, S -- AM18976/AM/NIADDK NIH HHS/ -- DE02570/DE/NIDCR NIH HHS/ -- HL11310/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Mar 18;219(4590):1343-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6828863" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basement Membrane/metabolism ; Cells, Cultured ; Collagen/*biosynthesis/immunology ; Liver/cytology/*metabolism ; Molecular Weight ; Rats
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-12-09
    Description: Nonmalignant diploid human fibroblast cells (GM3498B) derived from a skin biopsy of a patient with Bloom's syndrome have been transformed by transfection with DNA from a tumorigenic mouse cell line (Ha-8) carrying a single copy of the Harvey murine sarcoma virus (Ha-MuSV) genome. The transformed cell lines have an extended life-span, form colonies in agarose, and proliferate in nude mice--characteristics of neoplastic transformation. Like the parental cells, they also exhibit a high spontaneous level of sister chromatid exchanges. Finally, the transformed cells contain most, if not all, of the Ha-MuSV genome as well as the human rasH sequence. These experiments show that these diploid nonmalignant human cells can be used as recipients in transfection experiments for studying the genetic control of neoplastic transformation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doniger, J -- Di Paolo, J A -- Popescu, N C -- New York, N.Y. -- Science. 1983 Dec 9;222(4628):1144-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6648529" target="_blank"〉PubMed〈/a〉
    Keywords: Bloom Syndrome/*genetics ; Cell Adhesion ; *Cell Transformation, Neoplastic ; Cells, Cultured ; DNA, Neoplasm/*genetics ; Humans ; Oncogenes ; Transfection
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  • 6
    Publication Date: 1983-04-08
    Description: Cultured bronchial epithelial and fibroblastic cells from humans were used to study DNA damage and toxicity caused by formaldehyde. Formaldehyde caused the formation of cross-links between DNA and proteins, caused single-strand breaks in DNA, and inhibited the resealing of single-strand breaks produced by ionizing radiation. Formaldehyde also inhibited the unscheduled DNA synthesis that occurs after exposure of cells to ultraviolet irradiation or to benzo[a]pyrene diolexpoxide but at doses substantially higher than those required to inhibit the resealing of x-ray-induced single-strand breaks. Therefore, formaldehyde could exert its mutagenic and carcinogenic effects by both damaging DNA and inhibiting DNA repair.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grafstrom, R C -- Fornace, A J Jr -- Autrup, H -- Lechner, J F -- Harris, C C -- New York, N.Y. -- Science. 1983 Apr 8;220(4593):216-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6828890" target="_blank"〉PubMed〈/a〉
    Keywords: Bronchi/*cytology/drug effects ; Cells, Cultured ; *DNA/biosynthesis ; DNA Repair/*drug effects ; Epithelium/drug effects ; Fibroblasts/drug effects ; Formaldehyde/*pharmacology ; Humans
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-10-07
    Description: Suspensions of embryonic chick neuronal cells adhered to monolayers of glial cells, but few neurons bound to control monolayers of fibroblastic cells from meninges or skin. Neuronal cell-glial cell adhesion was inhibited by prior incubation of the neurons with Fab' fragments of antibodies to neuronal membranes. In contrast, antibodies to the neural cell adhesion molecule (N-CAM) did not inhibit the binding. These results suggest that a specific adhesive mechanism between neurons and glial cells exists and that it is mediated by CAM's that differ from those so far identified.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grumet, M -- Rutishauser, U -- Edelman, G M -- AI-11378/AI/NIAID NIH HHS/ -- HD-09635/HD/NICHD NIH HHS/ -- HD-16550/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Oct 7;222(4619):60-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6194561" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Antigen-Antibody Complex ; *Cell Adhesion ; Cell Membrane/immunology ; Cells, Cultured ; Chick Embryo ; Epitopes ; Immunoglobulin Fab Fragments ; Neuroglia/*physiology ; Neurons/immunology/*physiology
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-07-22
    Description: Protein phosphorylation is a principal regulatory mechanism in the control of almost all cellular processes. The nature of the protein phosphatases that participate in these reactions has been a subject of controversy. Four enzymes, termed protein phosphatases 1, 2A, 2B, and 2C, account for virtually all of the phosphatase activity toward phosphoproteins involved in controlling glycogen metabolism, glycolysis, gluconeogenesis, fatty acid synthesis, cholesterol synthesis, and protein synthesis. The properties, physiological roles, and mechanisms for regulating the four protein phosphatases are reviewed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ingebritsen, T S -- Cohen, P -- New York, N.Y. -- Science. 1983 Jul 22;221(4608):331-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6306765" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/physiology ; Cyclic AMP/metabolism ; Glycogen/metabolism ; Liver/enzymology ; Muscles/enzymology ; Phosphoprotein Phosphatases/classification/*physiology ; Phosphoproteins/metabolism ; Phosphorylase Phosphatase/metabolism ; Phosphorylation ; Protein Biosynthesis ; Protein Kinases/physiology ; Rabbits ; Rats
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  • 9
    Publication Date: 1983-09-23
    Description: Evidence is presented that a tumor-derived transforming growth factor is responsible for stimulating bone resorption and causing hypercalcemia in an animal tumor model of the hypercalcemia of malignancy. Both conditioned medium harvested from cultured tumor cells and tumor extracts of the transplantable rat Leydig cell tumor associated with hypercalcemia contained a macromolecular bone resorbing factor with the chemical characteristics of a tumor-derived transforming growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ibbotson, K J -- D'Souza, S M -- Ng, K W -- Osborne, C K -- Niall, M -- Martin, T J -- Mundy, G R -- AM-28149/AM/NIADDK NIH HHS/ -- CA-29537/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 23;221(4617):1292-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6577602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Resorption ; Calcium ; Cells, Cultured ; Culture Media ; Growth Substances/*physiology ; Hypercalcemia/*etiology ; Leydig Cell Tumor/complications/*physiopathology ; Male ; Neoplasm Proteins/*physiology ; Neoplasms, Experimental/complications/physiopathology ; Peptides/*physiology ; Rats ; Transforming Growth Factors
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  • 10
    Publication Date: 1983-04-01
    Description: The tissue culture condition that is required for the type of chromosome breakage seen at most fragile sites, namely, the absence of folic acid and thymidine in the medium, greatly enhanced micronucleus formation in proliferating lymphocyte cultures from normal individuals. This suggests that chromosome breakage at fragile sites and the apparently spontaneous damage that gives rise to micronuclei are controlled by the same mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacky, P B -- Beek, B -- Sutherland, G R -- New York, N.Y. -- Science. 1983 Apr 1;220(4592):69-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6828880" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Cell Nucleus/drug effects/ultrastructure ; Cells, Cultured ; Child ; *Chromosome Aberrations ; Chromosome Fragile Sites ; *Chromosome Fragility ; Culture Media ; Dose-Response Relationship, Drug ; Female ; Folic Acid/pharmacology ; Humans ; Lymphocytes/ultrastructure ; Male ; Middle Aged ; Thymidine/pharmacology
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  • 11
    Publication Date: 1983-09-23
    Description: When cultured in a hypoxic environment similar to that found in the center of a wound, macrophages secreted active angiogenesis factor into the medium. Under conditions similar to those of well-oxygenated tissue, macrophages did not secrete active angiogenesis factor. Macrophages that secreted the factor at hypoxic conditions stopped secreting it when returned to room air. Thus the control of angiogenesis in wound healing may be the result of macrophages responding to tissue oxygen tension without the necessity of interacting with other cell types or biochemical signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knighton, D R -- Hunt, T K -- Scheuenstuhl, H -- Halliday, B J -- Werb, Z -- Banda, M J -- GM27345/GM/NIGMS NIH HHS/ -- HL26323/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 23;221(4617):1283-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612342" target="_blank"〉PubMed〈/a〉
    Keywords: Angiogenesis Inducing Agents/*biosynthesis ; Animals ; Anoxia/physiopathology ; Cells, Cultured ; Cornea ; Growth Substances/*biosynthesis ; Macrophages/*physiology ; Models, Biological ; Oxygen/*physiology ; Rabbits ; *Wound Healing
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-02-04
    Description: The distribution of keratin intermediate filaments, previously considered static in organization and imperturbable by conventional drugs used to alter the structure and organization of the cytoskeleton, can be altered significantly by treatment with colchicine and cytochalasin D. The loss of microfilaments and microtubules converts the keratin cytoskeleton from a branching, even distribution to a series of starlike structures whose filaments are maintained by multiple membrane attachment sites. These findings provide a means for manipulating cytokeratin organization to investigate the role of keratins in cytoskeletal structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knapp, L W -- O'Guin, W M -- Sawyer, R H -- New York, N.Y. -- Science. 1983 Feb 4;219(4584):501-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6186022" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Colchicine/*pharmacology ; Cytochalasin D ; Cytochalasins/*pharmacology ; Cytoskeleton/*drug effects ; Epithelium ; *Keratins ; Mice ; Microtubules/drug effects
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  • 13
    Publication Date: 1983-09-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1983 Sep 16;221(4616):1164-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6310747" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anticholesteremic Agents/therapeutic use ; Cholesterol/*blood ; Coronary Disease/drug therapy/*etiology ; Humans ; Lovastatin ; Naphthalenes/therapeutic use ; Rabbits ; Receptors, Cell Surface/physiology ; Receptors, LDL
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  • 14
    Publication Date: 1983-11-11
    Description: Endothelial cells from human blood vessels were cultured in vitro, with doubling times of 17 to 21 hours for 42 to 79 population doublings. Cloned human endothelial cell strains were established for the first time and had similar proliferative capacities. This vigorous cell growth was achieved by addition of heparin to culture medium containing reduced concentrations of endothelial cell growth factor. The routine cloning and long-term culture of human endothelial cells will facilitate studying the human endothelium in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornton, S C -- Mueller, S N -- Levine, E M -- AG-00839/AG/NIA NIH HHS/ -- T32-CA-09171/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Nov 11;222(4624):623-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6635659" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division/drug effects ; Cells, Cultured ; Clone Cells/enzymology ; Endothelium/*cytology ; Growth Substances/pharmacology ; Heparin/*pharmacology ; Humans ; Time Factors
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  • 15
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-05-27
    Description: Parasympathetic neurons, when cultured alone, lose sensitivity to acetylcholine, but if striated muscle is included in the culture, neuronal chemosensitivity is maintained. The membrane remnants of myotubes ruptured by osmotic shock also supported the responsiveness of the cultured neurons to transmitter, whereas muscle-conditioned medium or membrane remnants of nonmuscle embryonic skin cells did not support this responsiveness. The regulation of chemosensitivity by contact of neurons with the target cell membrane may be important in the formation and maintenance of neuronal circuitry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tuttle, J B -- NS-10338/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 May 27;220(4600):977-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6133352" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/physiology ; Animals ; Cell Membrane/physiology ; Cells, Cultured ; Chick Embryo ; Fibroblasts/physiology ; Muscles/*physiology ; Nervous System/growth & development ; Neurons/*physiology ; Neurotransmitter Agents/*physiology ; Synapses/physiology
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-05-13
    Description: Bone morphogenetic protein and bone-derived growth factors are biochemical tools for research on induced cell differentiation and local mechanisms controlling cell proliferation. Bone morphogenetic protein irreversibly induces differentiation of perivascular mesenchymal-type cells into osteoprogenitor cells. Bone-derived growth factors are secreted by and for osteoprogenitor cells and stimulate DNA synthesis. Bone generation and regeneration are attributable to the co-efficiency of bone morphogenetic protein and bone-derived growth factors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Urist, M R -- DeLange, R J -- Finerman, G A -- DEO2103-17/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1983 May 13;220(4598):680-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6403986" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Development ; Bone Matrix/drug effects/physiology ; Bone Morphogenetic Proteins ; Bone Neoplasms/physiopathology ; Cattle ; Cell Differentiation ; DNA, Neoplasm/metabolism ; Dogs ; Growth Substances/*physiology ; Guinea Pigs ; Haplorhini ; Humans ; Insulin-Like Growth Factor II ; Mice ; *Osteogenesis ; Osteosarcoma/physiopathology ; Proteins/pharmacology/physiology ; Rabbits ; Rats
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  • 17
    Publication Date: 1983-10-14
    Description: 5 beta-Dihydrocortisol potentiated the threshold level (the smallest dose producing a measurable effect) of topically applied cortisol (0.02 percent) and dexamethasone (0.003 percent) in causing nuclear translocation of the cytosolic glucocorticoid receptor in rabbit iris-ciliary body tissue. 5 beta-Dihydrocortisol accumulates in cells cultured from trabecular meshwork specimens from patients with primary open-angle glaucoma, but not in similar cells derived from nonglaucomatous patients. In view of the sensitivity of patients with primary open-angle glaucoma to the effects of glucocorticoids in raising intraocular pressure, this potentiation may be responsible for the steroid sensitivity and for the ocular hypertension seen in this disorder.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weinstein, B I -- Gordon, G G -- Southren, A L -- EY 01313/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 14;222(4620):172-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623065" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/metabolism ; Ciliary Body/metabolism ; Cytoplasm/metabolism ; Dexamethasone/pharmacology ; Glaucoma, Open-Angle/*physiopathology ; Hydrocortisone/pharmacology ; Intraocular Pressure/*drug effects ; Iris/metabolism ; Rabbits ; Receptors, Glucocorticoid/*drug effects/metabolism ; Receptors, Steroid/*drug effects
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  • 18
    Publication Date: 1983-10-28
    Description: A protoplast fusion method was developed to stably transfect human cells with pSV2-derived plasmids at frequencies greater than 10(-3). This procedure made it possible to test the biological effect of a hepatitis B virus (HBV) gene independent of the viral structures required for infection. A pSV2gpt+ plasmid constructed to carry a subgenomic fragment of HBV that contained the core antigen gene (HBc gene) was transfected into human cells. A human epithelial cell line was stably transfected with the HBc+ gene by selecting recipient cells for expression of guanine phosphoribosyl transferase expression. With this gpt+/HBc+ cell line it was shown that growth in serum-free medium or treatment with 5'-azacytidine stimulates the production of the HBV core antigen. A hepatocellular carcinoma carrying the entire HBV genome was stimulated to produce the HBc gene product in response to the same factors that stimulated HBcAg production in the gpt+/HBc+ cell line constructed by transfection. The temporal relation between the cytopathologic response and HBc gene expression was similar for both cell types, indicating a primary role for HBc gene expression in the cytopathology of HBV-infected human liver.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoakum, G H -- Korba, B E -- Lechner, J F -- Tokiwa, T -- Gazdar, A F -- Seeley, T -- Siegel, M -- Leeman, L -- Autrup, H -- Harris, C C -- New York, N.Y. -- Science. 1983 Oct 28;222(4622):385-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6194563" target="_blank"〉PubMed〈/a〉
    Keywords: Azacitidine/pharmacology ; Cell Fusion ; *Cell Transformation, Viral ; Cells, Cultured ; Cytopathogenic Effect, Viral ; Gene Expression Regulation/drug effects ; Genes, Viral ; Hepatitis B Core Antigens/*genetics ; Humans ; Transfection
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  • 19
    Publication Date: 1983-10-28
    Description: Fluorinated anesthetics were observed noninvasively in the brain of intact rabbits with fluorine-19 nuclear magnetic resonance spectroscopy. High-resolution fluorine-19 spectra of halothane, methoxyflurane, and isoflurane were obtained with a surface coil centered over the calvarium. Elimination of halothane from the brain was also monitored by this technique. Residual fluorine-19 signals from halothane (or a metabolite) could be detected as long as 98 hours after termination of anesthesia. These observations demonstrate the feasibility of using this technique to study the fate of fluorinated anesthetics in live mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wyrwicz, A M -- Pszenny, M H -- Schofield, J C -- Tillman, P C -- Gordon, R E -- Martin, P A -- GM 29520/GM/NIGMS NIH HHS/ -- K04 GM 00503/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 28;222(4622):428-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623084" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; Halothane/*metabolism ; Isoflurane/*metabolism ; Kinetics ; Magnetic Resonance Spectroscopy ; Methoxyflurane/*metabolism ; Methyl Ethers/*metabolism ; Rabbits
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-01-21
    Description: Highly purified preparations of insulin receptor catalyzed the phosphorylation of the 95,000-dalton subunit of the insulin receptor. This subunit of the insulin receptor was also labeled with [alpha-32P]8-azidoadenosine 5'-triphosphate, a photoaffinity label for adenosine triphosphate binding sites. The identity of the 95,000-dalton band was confirmed in both cases by precipitation with a monoclonal antibody to the insulin receptor. These results suggest that the insulin receptor is itself a protein kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roth, R A -- Cassell, D J -- New York, N.Y. -- Science. 1983 Jan 21;219(4582):299-301.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849137" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Cell Line ; Cells, Cultured ; Lymphocytes ; Molecular Weight ; Phosphoproteins/physiology ; Protein Kinases/*physiology ; Receptor, Insulin/*physiology
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  • 21
    Publication Date: 1984-01-13
    Description: Cultures of human diploid fibroblasts contain cells that respond to exposure to the first component of complement (C1) by initiating DNA synthesis and growth. The plasma membranes of these cells have specific binding sites for the C1q subcomponent of C1. A fluorescence-activated cell sorter was used to isolate a subset of cells with a high affinity for C1q, and the growth and synthesis activities of these high-affinity cells were studied after numerous replications in vitro. These cells synthesize DNA and grow faster than the parent cultures and low-affinity cells, and they produce two to three times as much protein. About 40 percent of their total protein synthesis activity is directed to collagen production, unusually high proportions of collagen types III and V being produced. These properties and the high affinity of the cells for C1q are retained for at least six cell transfers. This phenotype has the properties expected of fibroblasts in healing wounds and inflamed tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bordin, S -- Page, R C -- Narayanan, A S -- DE-02600/DE/NIDCR NIH HHS/ -- DE-03301/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):171-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6691142" target="_blank"〉PubMed〈/a〉
    Keywords: *Antigens, CD44 ; Carrier Proteins ; Cell Division ; Cell Separation ; Cells, Cultured ; Collagen/*biosynthesis/classification ; DNA/*biosynthesis ; Fibroblasts/analysis/cytology/*physiology ; Flow Cytometry ; Gingiva ; Humans ; *Membrane Glycoproteins ; Mitochondrial Proteins ; Phenotype ; *Protein Biosynthesis ; Receptors, Complement/*analysis
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  • 22
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-05-06
    Description: Arachidonic acid plays a central role in a biological control system where such oxygenated derivatives as prostaglandins, thromboxanes, and leukotrienes are mediators. The leukotrienes are formed by transformation of arachidonic acid into an unstable epoxide intermediate, leukotriene A4, which can be converted enzymatically by hydration to leukotriene B4, and by addition of glutathione to leukotriene C4. This last compound is metabolized to leukotrienes D4 and E4 by successive elimination of a gamma-glutamyl residue and glycine. Slow-reacting substance of anaphylaxis consists of leukotrienes C4, D4, and E4. The cysteinyl-containing leukotrienes are potent bronchoconstrictors, increase vascular permeability in postcapillary venules, and stimulate mucus secretion. Leukotriene B4 causes adhesion and chemotactic movement of leukocytes and stimulates aggregation, enzyme release, and generation of superoxide in neutrophils. Leukotrienes C4, D4, and E4, which are released from the lung tissue of asthmatic subjects exposed to specific allergens, seem to play a pathophysiological role in immediate hypersensitivity reactions. These leukotrienes, as well as leukotriene B4, have pro-inflammatory effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Samuelsson, B -- New York, N.Y. -- Science. 1983 May 6;220(4597):568-75.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6301011" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arachidonic Acids/metabolism/pharmacology/physiology ; Bronchi/drug effects ; Cats ; Chemical Phenomena ; Chemistry ; Cricetinae ; Guinea Pigs ; Haplorhini ; Humans ; Hypersensitivity, Immediate/*physiopathology ; Inflammation/*physiopathology ; Leukocytes/drug effects/metabolism ; Leukotriene B4/pharmacology/*physiology ; Mice ; Microcirculation/drug effects ; Rabbits ; Rats ; SRS-A/*physiology
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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-01-14
    Description: Two plasmids containing nonoverlapping deletions of the herpes simplex virus thymidine kinase gene were introduced into thymidine kinase-deficient mouse L cells by DNA-mediated gene transfer. Thymidine kinase-producing transformants were generated by a mixture of the two plasmids at a frequency significantly greater than that generated by either plasmid alone. Southern blot analyses demonstrated that functional thymidine kinase genes were generated by homologous recombination between the two deletion mutants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Small, J -- Scangos, G -- New York, N.Y. -- Science. 1983 Jan 14;219(4581):174-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6294829" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cells, Cultured ; Chromosome Deletion ; *Genetic Engineering ; Mice ; Mutation ; *Plasmids ; *Recombination, Genetic ; Simplexvirus ; Thymidine Kinase/*genetics
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  • 24
    Publication Date: 1983-08-26
    Description: Macrophages isolated from tumor-bearing patients as well as cultured human monocytes express Fc receptors that cross-react strongly with murine immunoglobulins of the G2a but only slightly or not at all with the G1, G2b, or G3 subclasses. Such macrophages in the presence of murine immunoglobulin G2a monoclonal antibodies to tumors mediated the killing of tumor cells in vitro. These data suggest that monoclonal antibodies of the G2a subclass may be useful in the immunotherapy of human cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steplewski, Z -- Lubeck, M D -- Koprowski, H -- CA-10815/CA/NCI NIH HHS/ -- CA-21124/CA/NCI NIH HHS/ -- CA-25874/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Aug 26;221(4613):865-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*immunology ; Cells, Cultured ; Cytotoxicity, Immunologic ; Humans ; *Immunity, Cellular ; Immunoglobulin G/immunology ; Immunotherapy ; Macrophages/*immunology ; Mice ; Monocytes/immunology ; Neoplasms, Experimental/immunology/therapy ; Receptors, Fc/*immunology ; Species Specificity
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  • 25
    Publication Date: 1984-09-14
    Description: Nuclear estrogen receptor from MCF-7 cells undergoes a time-dependent, hormone-inducible transformation to a form that is less extractable from nuclei and less exchangeable with ligand. This receptor-modifying, intranuclear event is independent of receptor loss (processing) and appears associated with hormone responsiveness (progesterone-receptor induction) in these cells. The magnitude of receptor loss, however, is variable and apparently not a prerequisite for hormone action to induce progesterone receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasid, A -- Strobl, J S -- Huff, K -- Greene, G L -- Lippman, M E -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1162-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474170" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/*metabolism ; Cell Nucleus/metabolism ; Cells, Cultured ; Female ; Humans ; Receptors, Estradiol ; Receptors, Estrogen/*metabolism ; Receptors, Progesterone/biosynthesis ; Time Factors
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  • 26
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-04-27
    Description: Angiogenesis was observed and measured after injection of human follicular fluid into rabbit corneas. Undiluted human follicular fluid stimulated angiogenesis in every case, with new blood vessels visible 3 days after injection and extending 2.0 millimeters from the corneal scleral limbus into the injection site by day 15. Stimulation of angiogenesis was lost by heating or diluting the follicular fluid but was retained after charcoal stripping or dialysis. Human follicular fluid contains an angiogenic factor that may be associated with perifollicular neovascularization during folliculogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frederick, J L -- Shimanuki, T -- diZerega, G S -- New York, N.Y. -- Science. 1984 Apr 27;224(4647):389-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6200930" target="_blank"〉PubMed〈/a〉
    Keywords: Angiogenesis Inducing Agents/*analysis ; Animals ; Body Fluids/*analysis ; Chorionic Gonadotropin/pharmacology ; Cornea/blood supply ; Dialysis ; Female ; Growth Substances/*analysis ; Hot Temperature ; Humans ; Menstruation ; *Neovascularization, Pathologic ; Ovarian Follicle/*analysis ; Rabbits
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  • 27
    Publication Date: 1984-05-04
    Description: Peripheral blood lymphocytes from patients with the acquired immunodeficiency syndrome (AIDS) or with signs or symptoms that frequently precede AIDS (pre-AIDS) were grown in vitro with added T-cell growth factor and assayed for the expression and release of human T-lymphotropic retroviruses (HTLV). Retroviruses belonging to the HTLV family and collectively designated HTLV-III were isolated from a total of 48 subjects including 18 of 21 patients wih pre-AIDS, three of four clinically normal mothers of juveniles with AIDS, 26 of 72 adult and juvenile patients with AIDS, and from one of 22 normal male homosexual subjects. No HTLV-III was detected in or isolated from 115 normal heterosexual subjects. The number of HTLV-III isolates reported here underestimates the true prevalence of the virus since many specimens were received in unsatisfactory condition. Other data show that serum samples from a high proportion of AIDS patients contain antibodies to HTLV-III. That these new isolates are members of the HTLV family but differ from the previous isolates known as HTLV-I and HTLV-II is indicated by their morphological, biological, and immunological characteristics. These results and those reported elsewhere in this issue suggest that HTLV-III may be the primary cause of AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallo, R C -- Salahuddin, S Z -- Popovic, M -- Shearer, G M -- Kaplan, M -- Haynes, B F -- Palker, T J -- Redfield, R -- Oleske, J -- Safai, B -- New York, N.Y. -- Science. 1984 May 4;224(4648):500-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6200936" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/blood/*microbiology ; Adult ; Antigens, Viral/analysis ; Cells, Cultured ; Cytopathogenic Effect, Viral ; Deltaretrovirus/*isolation & purification/physiology/ultrastructure ; Female ; Homosexuality ; Humans ; Immune Sera/pharmacology ; Interferon Type I/immunology ; Male ; RNA-Directed DNA Polymerase/metabolism ; Risk ; T-Lymphocytes/microbiology
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  • 28
    Publication Date: 1984-11-02
    Description: Smooth muscle cells with 4C (double diploid) DNA content have been found in major arteries. The proportion of 4C cells increases with normal aging and with hypertension. These cells may represent a state of arrest at the G2 phase of the cell cycle or may be examples of true tetraploidy. Flow cytometric cell sorting was used to isolate 4C smooth muscle cells from the rat aorta, and the cells were cultured. Flow cytometry, Feulgen microdensitometry, and karyotyping of the progeny of the 4C cells established the presence of true tetraploid cells. These findings demonstrate the presence of reproductively viable tetraploid cells in a normal mammalian tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldberg, I D -- Rosen, E M -- Shapiro, H M -- Zoller, L C -- Myrick, K -- Levenson, S E -- Christenson, L -- 5-P01-CA-12662/CA/NCI NIH HHS/ -- AG00599/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):559-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494901" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta, Thoracic/analysis/*cytology ; Cells, Cultured ; DNA/analysis ; Flow Cytometry ; Humans ; Karyotyping ; Muscle, Smooth, Vascular/analysis/*cytology ; *Polyploidy ; Rats ; Rats, Inbred Strains
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  • 29
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-29
    Description: Protein 4.1 is a membrane skeletal protein that converts the low-affinity interaction between spectrin and actin into a high-affinity ternary complex of spectrin, protein 4.1, and actin that is essential to the structural stability of the erythrocyte. Pig brain was shown to contain an 87-kilodalton immunoreactive analog of protein 4.1 that has partial sequence homology with pig erythrocyte protein 4.1 and the same location as spectrin in the cortical cytoplasm of neuronal and glial cell types of the cerebellum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodman, S R -- Casoria, L A -- Coleman, D B -- Zagon, I S -- HL 26059/HL/NHLBI NIH HHS/ -- NS19357/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 29;224(4656):1433-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6374897" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Animals ; Blood Proteins/*metabolism ; Brain/*metabolism ; *Cytoskeletal Proteins ; Erythrocytes/metabolism ; Fluorescent Antibody Technique ; Immunoglobulin G/immunology ; Male ; *Membrane Proteins ; *Neuropeptides ; Rabbits ; Spectrin/metabolism ; Swine
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  • 30
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-05
    Description: The human malarial parasite Plasmodium falciparum can produce surface protrusions (knobs) on infected erythrocytes; however, long-term culturing of the parasite results in the appearance of knobless cells. In this study it was found that a knob-producing clone lost the ability to produce knobs in vitro. Furthermore, a clone not producing knobs derived from the knob-producing clone regained the capacity to produce knobby cells in vitro. Certain parasite proteins were associated with the knobby phenotype but not with the knobless type. These results indicate that the parasites change in vitro in a spontaneous and reversible manner independent of immunological selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gritzmacher, C A -- Reese, R T -- AI 18695/AI/NIAID NIH HHS/ -- DRR 00833/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6382613" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Clone Cells ; Erythrocytes/*parasitology/ultrastructure ; Humans ; Mutation ; Phenotype ; Plasmodium falciparum/analysis/genetics/growth & development/*physiology ; Proteins/analysis
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  • 31
    Publication Date: 1984-11-02
    Description: The motile activity of growth cones of specific identified neurons is inhibited by the neurotransmitter serotonin, although other identified neurons are unaffected. As a consequence, affected neurons are unable to form electrical synapses, whereas other neurons whose growth is unaffected can still interconnect. This result demonstrates that neurotransmitters can play a prominent role in regulating neuronal architecture and connectivity in addition to their classical role in neurotransmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haydon, P G -- McCobb, D P -- Kater, S B -- HD18577/HD/NICHD NIH HHS/ -- NS15350/NS/NINDS NIH HHS/ -- NS18819/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):561-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093252" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Population Groups ; Animals ; Cells, Cultured ; Neurons/*drug effects/growth & development ; Serotonin/*pharmacology ; Snails ; Synapses/*drug effects ; Synaptic Transmission
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  • 32
    Publication Date: 1984-04-20
    Description: Ganglion cells were dissociated from postnatal rat retinas, identified by specific fluorescent labels, and maintained in culture on a variety of substrates. Regeneration of processes by retinal ganglion cells was enhanced when the cells were plated on glass coated with a monoclonal antibody against the Thy-1 determinant. Plain glass and glass coated with polylysine, collagen, fibronectin, or other monoclonal antibodies supported the growth of neural processes, but were less effective than antibody to Thy-1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leifer, D -- Lipton, S A -- Barnstable, C J -- Masland, R H -- EY01075/EY/NEI NIH HHS/ -- EY03735/EY/NEI NIH HHS/ -- EY04179/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 20;224(4646):303-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6143400" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*physiology ; Antigens, Surface/*immunology ; Antigens, Thy-1 ; Cell Adhesion ; Cells, Cultured ; Isoantibodies/*physiology ; *Nerve Regeneration ; Polylysine/pharmacology ; Rats ; Retina/cytology/*physiology ; Retinal Ganglion Cells/*physiology
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  • 33
    Publication Date: 1984-08-24
    Description: Infectious retroviruses have been detected in 22 of 45 randomly selected patients with acquired immune deficiency syndrome (AIDS) and in other individuals from San Francisco. The AIDS-associated retroviruses (ARV) studied in detail had a type D morphology, Mg2+-dependent reverse transcriptase, and cytopathic effects on lymphocytes. The viruses can be propagated in an established adult human T cell line, HUT-78. They cross-react with antiserum to the lymphadenopathy-associated retrovirus isolated from AIDS patients in France. Antibodies to ARV were found in all 86 AIDS patients and in a high percentage of 88 other homosexual men in San Francisco. This observation indicates the widespread presence of these lymphocytopathic retroviruses and their close association with AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levy, J A -- Hoffman, A D -- Kramer, S M -- Landis, J A -- Shimabukuro, J M -- Oshiro, L S -- CA-34980/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 24;225(4664):840-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6206563" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/immunology/*microbiology ; Antibodies, Viral/analysis ; Bone Marrow/microbiology ; California ; Cell Line ; Cells, Cultured ; Cross Reactions ; Cytopathogenic Effect, Viral ; Deltaretrovirus/immunology/*isolation & purification/physiology/ultrastructure ; *Homosexuality ; Humans ; Leukocytes/microbiology ; Lymphatic Diseases/immunology ; Male ; RNA-Directed DNA Polymerase/metabolism ; Syndrome ; T-Lymphocytes ; Virus Cultivation
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  • 34
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-02-24
    Description: Human fibroblasts have exhibited enhanced DNA synthesis when exposed to sinusoidally varying magnetic fields for a wide range of frequencies (15 hertz to 4 kilohertz) and amplitudes (2.3 X 10(-6) to 5.6 X 10(-4) tesla). This effect, which is at maximum during the middle of the S phase of the cell cycle, appears to be independent of the time derivative of the magnetic field, suggesting an underlying mechanism other than Faraday's law. The threshold is estimated to be between 0.5 X 10(-5) and 2.5 X 10(-5) tesla per second. These results bring into question the allegedly specific magnetic wave shapes now used in therapeutic devices for bone nonunion. The range of magnetic field amplitudes tested encompass the geomagnetic field, suggesting the possibility of mutagenic interactions directly arising from short-term changes in the earth's field.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liboff, A R -- Williams, T Jr -- Strong, D M -- Wistar, R Jr -- New York, N.Y. -- Science. 1984 Feb 24;223(4638):818-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695183" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; DNA/*biosynthesis ; Humans ; *Magnetics ; Mutation ; Periodicity
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  • 35
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-03-30
    Description: Astroblasts in culture proliferated when exposed to glia maturation factor for at least 2 hours and then to insulin, but not when exposed in the reverse order. The sequential relation suggests that glia maturation factor is a competence factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lim, R -- Miller, J F -- CA-31796/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Mar 30;223(4643):1419-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6367047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/drug effects/physiology ; Cell Division/drug effects ; Cells, Cultured ; Drug Interactions ; Glia Maturation Factor ; Growth Substances/*pharmacology/physiology ; Insulin/*pharmacology/physiology ; Mice ; Mice, Inbred BALB C ; Nerve Tissue Proteins/*pharmacology/physiology ; Rats
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  • 36
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-08
    Description: Recent studies have uncovered a synaptic process with properties required for an intermediate step in memory storage. Calcium rapidly and irreversibly increases the number of receptors for glutamate (a probable neurotransmitter) in forebrain synaptic membranes by activating a proteinase (calpain) that degrades fodrin, a spectrin-like protein. This process provides a means through which physiological activity could produce long-lasting changes in synaptic chemistry and ultrastructure. Since the process is only poorly represented in the brain stem, it is hypothesized to be responsible for those forms of memory localized in the telencephalon.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lynch, G -- Baudry, M -- AG 00538/AG/NIA NIH HHS/ -- MH 19793-12/MH/NIMH NIH HHS/ -- NH 00358-03/NH/NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 8;224(4653):1057-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6144182" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/physiology ; Calpain ; Carrier Proteins/physiology ; Cerebral Cortex/physiology ; Endopeptidases/physiology ; Glutamates/physiology ; Glutamic Acid ; Hippocampus/physiology ; Humans ; Learning/physiology ; Leupeptins/pharmacology ; Memory/*physiology ; *Microfilament Proteins ; Neuronal Plasticity ; Rabbits ; Rats ; Receptors, Cell Surface/physiology ; Receptors, Glutamate ; Receptors, Neurotransmitter/physiology ; Synapses/physiology ; Synaptic Membranes/physiology ; Telencephalon/physiology
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  • 37
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-14
    Description: The electrophysiological properties of glial cells were examined in primary culture in the presence of tetraethylammonium and Ba2+, a treatment that reduces K+ permeability of the membrane and enhances currents through voltage-dependent Ca2+ channels. Under these conditions, glial cells showed both spontaneous action potentials and action potentials evoked by the injections of current. These responses appear to represent entry of Ba2+ through Ca2+ channels because they were resistant to tetrodotoxin but were blocked by Mn2+ or Cd2+.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacVicar, B A -- New York, N.Y. -- Science. 1984 Dec 14;226(4680):1345-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095454" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Barium/pharmacology ; Cadmium/pharmacology ; Calcium/*metabolism ; Cells, Cultured ; Evoked Potentials ; Ion Channels/*physiology ; Microelectrodes ; Neuroglia/*physiology ; Tetraethylammonium Compounds/pharmacology ; Tetrodotoxin/pharmacology
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  • 38
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-01-20
    Description: Classical conditioning of the eyelid response in the rabbit was used to investigate the neuronal structures mediating basic associative learning of discrete, adaptive responses. Lesions of the ipsilateral dentate-interpositus nuclei, but not of the cerebellar cortex, abolished the learned eyeblink response. Recordings from these nuclei have revealed neuronal responses related to the learning of the response. Stimulating these recording sites produced the eyelid response. The dentate-interpositus nuclei were concluded to be critically involved in the learning and production of classically conditioned responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCormick, D A -- Thompson, R F -- 1-F31-MH08673/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 20;223(4633):296-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6701513" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; *Blinking ; Cerebellar Cortex/physiology ; Cerebellum/*physiology ; *Conditioning, Classical ; *Conditioning, Eyelid ; Rabbits
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  • 39
    Publication Date: 1984-11-30
    Description: Intraperitoneal administration of insulin to control rats and to rats with pituitary stalk transections or with lesions of the median eminence resulted in increased plasma adrenocorticotropin (ACTH) levels. The insulin-induced stimulation of ACTH release was blocked in both the control and lesioned animals by prior treatment with either the beta-adrenergic antagonist propranolol or the glucocorticoid analog dexamethasone. The direct application of insulin to primary cultures of the anterior pituitary did not evoke ACTH release or affect the maximal ability of corticotropin-releasing factor or epinephrine to stimulate ACTH secretion. The results suggest that insulin stimulates ACTH release by a mechanism in which catecholamines of peripheral origin act directly on the anterior pituitary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mezey, E -- Reisine, T D -- Brownstein, M J -- Palkovits, M -- Axelrod, J -- New York, N.Y. -- Science. 1984 Nov 30;226(4678):1085-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093262" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/blood/*secretion ; Animals ; Cells, Cultured ; Corticotropin-Releasing Hormone/pharmacology ; Dexamethasone/pharmacology ; Epinephrine/pharmacology ; Insulin/*pharmacology ; Median Eminence/physiology ; Pituitary Gland/physiology ; Pituitary Gland, Anterior/drug effects/*secretion ; Propranolol/*pharmacology ; Rats ; Receptors, Adrenergic, beta/drug effects/*physiology
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  • 40
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-29
    Description: Normal human colon mucosal epithelial cells were cultured in vitro and treated with the oncogenic simian DNA virus (SV40) and the chemical carcinogen azoxymethane. Both SV40 and azoxymethane altered a number of phenotypic characteristics of the normal human colon cells, including their morphology, culture longevity, growth in soft agar, substrate adherence, and peanut agglutinin binding. The SV40 transformants synthesized intranuclear T antigen. These data indicate that normal human colon mucosal cells were transformed toward the malignant phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moyer, M P -- Aust, J B -- RRO5654/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 29;224(4656):1445-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6328655" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Viral, Tumor/metabolism ; Azoxymethane/pharmacology ; Cell Transformation, Neoplastic/*physiopathology ; Cells, Cultured ; Colon/*cytology/drug effects ; Colonic Neoplasms/physiopathology ; Fibroblasts/drug effects ; Humans ; Lectins/pharmacology ; Simian virus 40/metabolism
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  • 41
    Publication Date: 1984-04-27
    Description: Immunodominant, disulfide-bond independent epitopes recognized by human antibodies to hepatitis B virus (HBV) are located within the 55-residue amino terminal portion (coded for by the pre-S region of HBV DNA) of minor HBV envelope components larger than the major protein constituents encoded by the S gene. A peptide having the sequence of the first 26 amino acids from the amino terminal methionine was synthesized and elicited antibodies (at dilutions of greater than or equal to 1 to 10(5) ) to the HBV envelope. These antibodies can be utilized for diagnostic tests. The immunogenicity of the peptide was substantially increased by covalent attachment to liposomes. The disulfide bond-independent determinants on sequences coded for by the pre-S gene may be more easily mimicked by peptide analogs than "conformational" determinants on the S-gene product.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Neurath, A R -- Kent, S B -- Strick, N -- 9011/PHS HHS/ -- New York, N.Y. -- Science. 1984 Apr 27;224(4647):392-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6200931" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Epitopes/*analysis/genetics/immunology ; *Genes, Viral ; Hepatitis B Antibodies/biosynthesis ; Hepatitis B Surface Antigens/analysis/genetics/*immunology ; Hepatitis B virus/genetics/*immunology ; Immunization ; Liposomes ; Peptides/chemical synthesis/genetics/*immunology ; Rabbits
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-02-10
    Description: When human lymphocytes were cultured with [3H]thymidine, which acts as a source of low-level chronic radiation, and then exposed to 150 rad of x-rays at 5, 7, 9, or 11 hours before fixation, the yield of chromatid aberrations was less than the sum of the yields of aberrations induced by [3H]thymidine and x-rays separately. Often fewer aberrations were found after exposure to radiation from both sources than were found after exposure to x-rays alone. At the same fixation times, nonradioactive thymidine did not affect the yield of x-ray-induced aberrations. The same phenomenon occurred at earlier fixation times, after exposure to 30 or 40 rad of x-rays and [3H]thymidine. This response is analogous to the adaptive response to alkylating agents whereby prior treatment with small doses for a long period reduces the damage occurring from large doses of similar agents given for a short time.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olivieri, G -- Bodycote, J -- Wolff, S -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):594-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695170" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; *Chromosome Aberrations ; Chromosome Deletion ; Humans ; Lymphocytes/drug effects/physiology/*radiation effects ; Metaphase/drug effects/radiation effects ; Thymidine/*toxicity ; Tritium
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  • 43
    Publication Date: 1984-08-17
    Description: Antisera to a synthetic c-myc peptide and to c-myc antigens synthesized from various portions of the human gene expressed in Escherichia coli were used in order to characterize the protein product of the human c-myc oncogene. Although the deduced molecular weight of the human c-myc protein is 49,000, these antisera precipitate a protein from human cells that migrates in sodium dodecyl sulfate-polyacrylamide gel as if its molecular weight were 65,000. In addition, the mouse c-myc protein, whether synthesized in cells or in a cell-free system directed by pure, synthetic messenger RNA, has analogous properties and is immunoprecipitated by the antiserum to the human c-myc protein. Similar proteins are immunoprecipitated from monkey, rat, hamster, and frog cells, suggesting evolutionary conservation of antigenic structure of the c-myc protein among vertebrates. In addition, and in a manner consistent with the behavior of its messenger RNA, the immunoprecipitable c-myc protein is sharply induced by the action of mitogens on resting human T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Persson, H -- Hennighausen, L -- Taub, R -- DeGrado, W -- Leder, P -- New York, N.Y. -- Science. 1984 Aug 17;225(4663):687-93.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6431612" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Neoplasm/*immunology ; Base Sequence ; *Cell Division ; Chickens ; Cricetinae ; DNA, Neoplasm/genetics ; DNA, Recombinant/metabolism ; Electrophoresis, Polyacrylamide Gel ; Haplorhini ; Humans ; Mice ; Mitogens/pharmacology ; Molecular Weight ; Neoplasm Proteins/genetics/*immunology ; *Oncogenes ; RNA, Messenger/genetics ; Rabbits ; Rats
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  • 44
    Publication Date: 1984-02-17
    Description: Cell-free conditioned media from human T cells transformed by human T-cell leukemia-lymphoma virus (HTLV-I) were tested for the production of soluble biologically active factors, including several known lymphokines. The cell lines used were established from patients with T-cell leukemia-lymphoma and from human umbilical cord blood and bone marrow leukocytes transformed by HTLV-I in vitro. All of the cell lines liberated constitutively one or more of the 12 biological activities assayed. These included macrophage migration inhibitory factor (MIF), leukocyte migration inhibitory factor (LIF), leukocyte migration enhancing factor (MEF), macrophage activating factor (MAF), differentiation inducing factor (DIF), colony stimulating factor (CSF), eosinophil growth and maturation activity (eos. GMA), fibroblast activating factor (FAF), gamma-interferon and, in rare instances, T-cell growth factor (TCGF). Some cell lines produced interleukin 3 (IL-3), platelet-derived growth factor (PDGF), or B-cell growth factors (BCGF). Such cells should prove useful for the production of lymphokines and as sources of specific messenger RNA's for their genetic cloning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Salahuddin, S Z -- Markham, P D -- Lindner, S G -- Gootenberg, J -- Popovic, M -- Hemmi, H -- Sarin, P S -- Gallo, R C -- New York, N.Y. -- Science. 1984 Feb 17;223(4637):703-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6320367" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal ; Antigens, Neoplasm/analysis ; Bone Marrow ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Deltaretrovirus/*genetics ; Female ; Humans ; Leukemia/*microbiology ; Lymphokines/*biosynthesis ; Lymphoma/*microbiology ; Phenotype ; Pregnancy ; T-Lymphocytes/*immunology
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  • 45
    Publication Date: 1984-04-27
    Description: The gene coding for the circumsporozoite antigen of the malaria parasite Plasmodium knowlesi was inserted into the vaccinia virus genome under the control of a defined vaccinia virus promoter. Cells infected with the recombinant virus synthesized polypeptides of 53,000 to 56,000 daltons that reacted with monoclonal antibody against the repeating epitope of the malaria protein. Furthermore, rabbits vaccinated with the recombinant virus produced antibodies that bound specifically to sporozoites. These data provide evidence for expression of a cloned malaria gene in mammalian cells and illustrate the potential of vaccinia virus recombinants as live malaria vaccines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, G L -- Godson, G N -- Nussenzweig, V -- Nussenzweig, R S -- Barnwell, J -- Moss, B -- New York, N.Y. -- Science. 1984 Apr 27;224(4647):397-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6200932" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Formation ; Antigens, Surface/analysis/*genetics/immunology ; *Cloning, Molecular ; *DNA, Recombinant ; Epitopes/immunology ; Genes ; Genes, Viral ; Genetic Vectors ; Operon ; Plasmodium/*genetics/immunology ; Rabbits ; Vaccination ; Vaccinia virus/*genetics
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  • 46
    Publication Date: 1983-08-12
    Description: Since it has been postulated that liver hepatocytes may become infected by hepatitis B virus (HBV) in vivo through direct contact with infected macrophages, the possibility that a circulating cell of hematopoietic origin might be susceptible to infection with HBV was investigated. Cells positive for HBV surface antigen were identified in aspirates of bone marrow cells from people infected with HBV. These cells were used to prepare a lymphoblastoid suspension culture that contains HBV-infected cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Romet-Lemonne, J L -- McLane, M F -- Elfassi, E -- Haseltine, W A -- Azocar, J -- Essex, M -- New York, N.Y. -- Science. 1983 Aug 12;221(4611):667-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6867736" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Hepatitis B/*microbiology/pathology ; Hepatitis B Surface Antigens/immunology ; Hepatitis B virus/growth & development ; Humans ; Liver/pathology ; Lymphocytes/*microbiology/pathology ; Male ; Middle Aged
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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-05-11
    Description: Electrical stimulation techniques were used to produce a long-lasting potentiation of synaptic transmission in the hippocampus of naive rabbits. Animals were then classically conditioned. Long-term potentiation of the hippocampus before training increased the rate at which animals subsequently learned the conditioning task. This result has significance for potential cellular mechanisms of associative learning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berger, T W -- MH 00343/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1984 May 11;224(4649):627-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6324350" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electric Stimulation ; Hippocampus/*physiology ; Learning/*physiology ; Male ; Nictitating Membrane/physiology ; Rabbits ; Receptors, Neurotransmitter/physiology ; Synapses/physiology ; *Synaptic Transmission
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  • 48
    Publication Date: 1984-11-16
    Description: The benzodiazepine-gamma-aminobutyric acid receptor complex was used to study functional receptor synthesis and degradation in primary cultures of neurons. Fifty percent of the receptors turned over with an unusually rapid half-life (4 hours); this was followed by a second, slower phase (32 hours). These results provide the basis for elucidating the mechanism by which neurons derived from the central nervous system control neurotransmitter receptor number, an important problem in cellular neurobiology. The findings may be of significance in the study of neurological and psychiatric disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borden, L A -- Czajkowski, C -- Chan, C Y -- Farb, D H -- New York, N.Y. -- Science. 1984 Nov 16;226(4676):857-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093257" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Chick Embryo ; Flunitrazepam/metabolism ; Half-Life ; Kinetics ; Neurons/*metabolism ; Receptors, GABA-A/biosynthesis/*metabolism ; Spinal Cord/cytology ; gamma-Aminobutyric Acid/physiology
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  • 49
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-04-29
    Description: Cultured hippocampal neurons, when exposed to cyanide or an anoxic atmosphere in the early stages of differentiation, were not visibly affected. However, neurons in the mature cultures died when exposed to cyanide or anoxia. Cell death could be prevented by treatment with magnesium, which eliminates synaptic activity. These observations suggest that damage in hypoxic neurons is mediated by synaptic activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rothman, S M -- 5 K07 N500568-02/PHS HHS/ -- New York, N.Y. -- Science. 1983 Apr 29;220(4596):536-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836300" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Anoxia/*metabolism/physiopathology ; Cells, Cultured ; Hippocampus/cytology ; Magnesium/pharmacology ; Magnesium Chloride ; Membrane Potentials/drug effects ; Neurons/metabolism/*physiology ; Rats ; Sodium Cyanide/pharmacology ; Synapses/drug effects/*physiology
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  • 50
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-03-11
    Description: Primary cultures of epithelial cells were grown from the tonsils and adenoids of patients with diseases not related to Epstein-Barr virus. The cells could not be infected by Epstein-Barr virus. Fluorescein-labeled Epstein-Barr virus and a cytofluorograph were then used to show that the epithelial cells do not have detectable receptors for the virus. However, implantation with Epstein-Barr virus receptors gave the cells the ability to bind the labeled virus. One to 5 percent of receptor-implanted cells exposed to the transforming B95-8 substrain of the virus expressed Epstein-Barr nuclear antigen. The early and viral capsid Epstein-Barr virus-determined antigens were not detected in the virus-infected cultures. The results show that normal human epithelial cells from the nasopharynx become susceptible to infection by Epstein-Barr virus when the membrane barrier resulting from the lack of viral receptors is overcome by receptor implantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, I M -- Volsky, D J -- 1R01 CA33386-01/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 11;219(4589):1225-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6298935" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Epithelium/*microbiology ; Herpesviridae Infections/*microbiology ; Herpesvirus 4, Human/growth & development ; Humans ; Receptors, Virus/metabolism ; Virus Replication
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  • 51
    Publication Date: 1984-06-08
    Description: An H1 histone gene was isolated from a 15-kilobase human DNA genomic sequence. The presence of H2A, H2B, H3, and H4 genes in this same 15-kilobase fragment indicates that mammalian core and H1 histone genes are clustered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carozzi, N -- Marashi, F -- Plumb, M -- Zimmerman, S -- Zimmerman, A -- Coles, L S -- Wells, J R -- Stein, G -- Stein, J -- GM 32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 8;224(4653):1115-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6719136" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; DNA/genetics ; *Genes ; HeLa Cells ; Histones/*genetics ; Humans ; Nucleic Acid Hybridization ; Rabbits ; Trout ; Xenopus
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  • 52
    Publication Date: 1984-11-30
    Description: Complementary DNA clones of genes induced by platelet-derived growth factor (PDGF) in BALB/c-3T3 cells were isolated; one such clone contains a domain having nucleotide sequence homology with the third exon of c-fos. This nucleotide sequence homology is reflected in the predicted amino acid sequences of the gene products. Under low stringency conditions, the mouse v-fos gene cross-hybridizes with the PDGF-inducible complementary DNA clone. However, the messenger RNA transcripts of mouse c-fos and the new fos-related gene can be distinguished by gel electrophoresis and by S1 nuclease analysis. Expression of the authentic c-fos gene is induced by PDGF and superinduced by the combination of PDGF and cycloheximide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cochran, B H -- Zullo, J -- Verma, I M -- Stiles, C D -- New York, N.Y. -- Science. 1984 Nov 30;226(4678):1080-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093261" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cells, Cultured ; *Cloning, Molecular ; DNA/analysis ; DNA Restriction Enzymes ; DNA Transposable Elements ; Endonucleases ; Genes/drug effects ; Mice ; Mice, Inbred BALB C ; Nucleic Acid Hybridization ; Oncogenes/*drug effects ; Platelet-Derived Growth Factor/*pharmacology ; Single-Strand Specific DNA and RNA Endonucleases ; Transcription, Genetic/drug effects
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 53
    Publication Date: 1983-04-15
    Description: Hippocampal ablation has no effect on the acquisition of the rabbit's classically conditioned nictitating membrane response. Systemic administration of scopolamine, which alters hippocampal neuronal activity, severely retards acquisition of the conditioned response in normal animals and those with cortical ablations. In animals with hippocampal ablations, however, scopolamine has no effect on conditioning. These findings suggest that altered neuronal activity in the hippocampus is more detrimental to conditioning than removing the structure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Solomon, P R -- Solomon, S D -- Schaaf, E V -- Perry, H E -- MH33381/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):329-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836277" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Conditioning, Classical/drug effects/*physiology ; Female ; Hippocampus/drug effects/*physiology ; Male ; Nictitating Membrane/physiology ; Rabbits ; Scopolamine Hydrobromide/pharmacology
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  • 54
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-05-27
    Description: Amiloride inhibited the ouabain-sensitive rate of oxygen consumption (QO2) of a suspension of rabbit intact proximal tubules in the presence of different concentrations of extracellular sodium. Measurements of the ouabain-sensitive QO2 in the presence of nystatin, the tissue sodium and potassium contents of the tubules in suspension, and the sodium- and potassium-dependent adenosinetriphosphatase (Na,K-ATPase) activity of lysed tubule membranes indicated that the effect of amiloride was due to a direct inhibition of the Na,K-ATPase activity of the proximal tubule.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Soltoff, S P -- Mandel, L J -- AM26816/AM/NIADDK NIH HHS/ -- GM29256/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 May 27;220(4600):957-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6302840" target="_blank"〉PubMed〈/a〉
    Keywords: Amiloride/*pharmacology ; Animals ; Dose-Response Relationship, Drug ; Female ; Ion Channels/drug effects ; Kidney Tubules, Proximal/drug effects/*enzymology ; Nystatin/pharmacology ; Ouabain/pharmacology ; Oxygen Consumption/drug effects ; Pyrazines/*pharmacology ; Rabbits ; Rats ; Sodium/metabolism ; Sodium-Potassium-Exchanging ATPase/*antagonists & inhibitors/metabolism
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  • 55
    Publication Date: 1983-09-23
    Description: Changes occur in the synthesis and axonal transport of neuronal proteins in dorsal-root ganglia axons as a result of contact with cells from the spinal cord during synapse formation. Dorsal-root ganglia cells were cultured in a compartmental cel culture system that allows separate access to neuronal cell bodies and their axons. When cells from the ventral spinal cord were cultured with the dorsal-root ganglia axons, synapses were established within a few days. Metabolic labeling and two-dimensional electrophoresis revealed that four of more than 300 axonal proteins had changed in their expression by the time synapses were established. The highly selective nature of these changes suggests that the proteins involved may be important in the processes of axon growth and synapse formation and their regulation by the regional environment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sonderegger, P -- Fishman, M C -- Bokoum, M -- Bauer, H C -- Nelson, P G -- New York, N.Y. -- Science. 1983 Sep 23;221(4617):1294-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612344" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*metabolism ; Cells, Cultured ; Chick Embryo ; Isoelectric Point ; Molecular Weight ; Nerve Tissue Proteins/*biosynthesis ; Synapses/*metabolism
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  • 56
    Publication Date: 1983-02-04
    Description: Two toxins, latrunculins A and B, which contain a new class of 16- and 14-membered marine macrolides attached to the rare 2-thiazolidinone moiety, were purified recently from the Red Sea sponge Latrunculia magnifica. The effects of these toxins on cultured mouse neuroblastoma and fibroblast cells have been evaluated. In both types of cells, submicromolar toxin concentrations rapidly induce striking changes in cell morphology that are reversible upon removal of the toxin. Immunofluorescence studies with antibodies specific for cytoskeletal proteins reveal that the toxins cause major alterations in the organization of microfilaments without obvious effects on the organization of the microtubular system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spector, I -- Shochet, N R -- Kashman, Y -- Groweiss, A -- New York, N.Y. -- Science. 1983 Feb 4;219(4584):493-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6681676" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Animals ; *Bicyclo Compounds, Heterocyclic ; Cells, Cultured ; Cytoskeleton/*drug effects ; Fibroblasts/ultrastructure ; Marine Toxins/*pharmacology ; Microscopy, Fluorescence ; Microtubules/drug effects ; Neuroblastoma/ultrastructure ; Thiazoles/*pharmacology ; Thiazolidines
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  • 57
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-05-11
    Description: Protozoan parasites of the genus Cryptosporidium cause a short-term, flu-like, gastrointestinal illness in immunocompetent persons and severe, persistent, life-threatening diarrhea in immunodeficient individuals. No effective therapy is available for the treatment of cryptosporidiosis in the immunodeficient host. Complete development (from sporozoite to sporulated oocyst) of a human isolate of Cryptosporidium was achieved in cultured human fetal lung cells and primary chicken kidney and porcine kidney cells. The growth of this newly recognized zoonotic agent in cell culture now provides a means of studying its behavior, development, and metabolism, and a mechanism for evaluation of potentially useful therapeutic agents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Current, W L -- Haynes, T B -- New York, N.Y. -- Science. 1984 May 11;224(4649):603-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6710159" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/complications ; Animals ; Cattle ; Cells, Cultured ; Coccidia/*growth & development ; Coccidiosis/etiology/parasitology ; Culture Media ; Humans ; Mice
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  • 58
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-07
    Description: An assay was developed to detect recombination events taking place in an in vitro reaction. Extracts of cultured mouse preB lymphocytes were found to catalyze homologous recombination between substrate DNA molecules but not site-specific recombination between cloned mouse immunoglobulin D and J genes. Addition of deoxyribonucleoside triphosphates increased the frequency of homologous recombination. This recombination activity was not observed in two differentiated lymphocyte cell lines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Darby, V -- Blattner, F -- AI19325/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Dec 7;226(4679):1213-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6334360" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes ; Cells, Cultured ; Crossing Over, Genetic ; DNA, Viral ; Immunoglobulin Variable Region/genetics ; Mice ; Mutation ; Nucleoproteins/genetics ; *Recombination, Genetic
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  • 59
    Publication Date: 1984-01-06
    Description: Cultures derived from rat cerebral hemispheres were sequentially stained for acetylcholinesterase activity and for either somatostatin-like immunoreactivity or cholecystokinin-like immunoreactivity. Somatostatin-like immunoreactivity was found to coexist with acetylcholinesterase activity in individual neurons of several morphological subtypes, but cholecystokinin-like immunoreactivity and acetycholinesterase activity were never seen in the same neurons. These findings suggest a specific anatomical association, perhaps even an overlap, of the cholinergic and somatostatinergic systems in the mammalian cerebrum, and indicate that the combined deficiencies of somatostatin and cholinergic markers in Alzheimer's dementia and senile dementia of the Alzheimer type may be of pathophysiological importance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delfs, J R -- Zhu, C H -- Dichter, M A -- HD06276/HD/NICHD NIH HHS/ -- NS00608/NS/NINDS NIH HHS/ -- NS15362/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 6;223(4631):61-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6140757" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholinesterase/*metabolism ; Animals ; Brain/*cytology/enzymology ; Brain Chemistry ; Cells, Cultured ; Fluorescent Antibody Technique ; Neurons/*analysis/enzymology ; Rats ; Sincalide/analysis ; Somatostatin/*analysis
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  • 60
    Publication Date: 1984-02-10
    Description: Cells of the 10T 1/2 mouse fibroblast line transformed in vitro by ultraviolet radiation are antigenically similar to those from skin cancers produced in mice by repeated exposure to ultraviolet radiation. Both types of tumor cells grew preferentially in ultraviolet-irradiated syngeneic mice relative to untreated animals, and both were recognized by ultraviolet radiation-induced tumor-specific suppressor lymphocytes. These properties were not shared by 10T 1/2 cells transformed in vitro by x-rays or 3-methylcholanthrene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fisher, M S -- Kripke, M L -- Chan, G L -- CA-09078/CA/NCI NIH HHS/ -- CA-11751/CA/NCI NIH HHS/ -- N01-CO-23909/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):593-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695169" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*analysis ; Carcinogens ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Mice ; Mice, Inbred C3H ; Neoplasm Transplantation ; Transplantation, Isogeneic ; *Ultraviolet Rays
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  • 61
    Publication Date: 1984-09-14
    Description: Mouse tumors induced by gamma radiation are a useful model system for oncogenesis. DNA from such tumors contains an activated K-ras oncogene that can transform NIH 3T3 cells. This report describes the cloning of a fragment of the mouse K-ras oncogene containing the first exon from both a transformant in rat-2 cells and the brain of the same mouse that developed the tumor. Hybrid constructs containing one of the two pieces were made and only the plasmid including the first exon from the transformant gave rise to foci in NIH 3T3 cells. There was only a single base difference (G----A) in the exonic sequence, which changed glycine to aspartic acid in the transformant. By use of a synthetic oligonucleotide the presence of the mutation was demonstrated in the original tumor, ruling out modifications during DNA-mediated gene transfer and indicating that the alteration was present in the thymic lymphoma but absent from other nonmalignant tissue. The results are compatible with gamma radiation being a source of point mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guerrero, I -- Villasante, A -- Corces, V -- Pellicer, A -- CA-36327/CA/NCI NIH HHS/ -- GM-32036/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1159-62.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474169" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Transformation, Neoplastic ; Cells, Cultured ; Cloning, Molecular ; Gamma Rays ; Lymphoma/*genetics ; Mice ; Mutation ; Neoplasms, Radiation-Induced/*genetics ; Nucleic Acid Hybridization ; *Oncogenes ; Rats
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-11-09
    Description: Since the discovery in 1969 of a man-made surface-active material that would bond to bone, a range of materials with the same ability has been developed. These include glass, glass-ceramic, and ceramic materials which have a range of reaction rates and from which it should be possible to select a surface-active material for a specific application. The available materials and their similarities, differences, and current clinical applications are reviewed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hench, L L -- Wilson, J -- New York, N.Y. -- Science. 1984 Nov 9;226(4675):630-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093253" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biocompatible Materials/metabolism/therapeutic use ; Bone Cements/therapeutic use ; Bone and Bones/metabolism ; Ceramics ; Dogs ; Durapatite ; Glass ; Humans ; Hydroxyapatites/therapeutic use ; Male ; Orthodontics ; Rabbits ; Rats ; Rats, Inbred Strains ; Surface Properties ; Tissue Adhesives/therapeutic use
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  • 63
    Publication Date: 1984-10-05
    Description: Physiological properties of acetylcholine receptors on muscle cells at very early stages of ontogeny were compared with those of cells at later stages. Two changes were observed that contributed to an overall shortening of the mean open time of single-channels. First, there was a shift in the relative proportions of two receptor types with different conductances and mean open times, such that the contribution of receptors with large conductance and short open time increased as development proceeded. Second, there was a sharp reduction in the mean open time of channels having small conductance, with no similar change in channels having large conductance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leonard, R J -- Nakajima, S -- Nakajima, Y -- Takahashi, T -- NS08601/NS/NINDS NIH HHS/ -- T32-GM-07211/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):55-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474189" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Electric Conductivity ; Muscles/*embryology/physiology ; Receptors, Cholinergic/*physiology ; Xenopus
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  • 64
    Publication Date: 1984-01-13
    Description: Stimulation of cultures of murine bone-marrow cells with specific macrophage growth factor (colony-stimulating factor I) resulted in the production of type I interferon. Neutralization of this endogenous interferon by antiserum directed against interferons alpha and beta resulted in a significant enhancement of mononuclear phagocyte proliferation from committed marrow precursors. The effect of the antiserum was lost in cultures depleted of adherent cells, an indication that an adherent regulatory cell (or cells) in the marrow limits mononuclear phagocyte proliferation by producing antiproliferative interferon in response to high levels of specific growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, R N -- Larsen, H S -- Horohov, D W -- Rouse, B T -- AI-14981/AI/NIAID NIH HHS/ -- AI-18960/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):178-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6606850" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow ; Cell Division ; Cells, Cultured ; Clone Cells ; Colony-Stimulating Factors/*pharmacology ; Immune Sera ; Interferon Type I/biosynthesis/immunology/*physiology ; Macrophages/*cytology/physiology ; Mice ; Thymidine/metabolism
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  • 65
    Publication Date: 1984-11-09
    Description: Escherichia coli K-12 acquired the ability to produce a high titer of Shiga-like toxin after lysogenization by either of two different bacteriophages isolated from a highly toxinogenic Escherichia coli O157:H7 strain that causes hemorrhagic colitis. One of these phages and another Shiga-like toxin-converting phage from an Escherichia coli O26 isolate associated with infantile diarrhea were closely related in terms of morphology, virion polypeptides, DNA restriction fragments, lysogenic immunity, and heat stability, although a difference in host range was noted. These phages are currently the best-characterized representatives from a broader family of Shiga-like toxin-converting phages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Brien, A D -- Newland, J W -- Miller, S F -- Holmes, R K -- Smith, H W -- Formal, S B -- AI20148-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 9;226(4675):694-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6387911" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Toxins/*metabolism ; Bacteriophages/*metabolism ; Colitis, Ulcerative/*microbiology ; DNA, Viral/metabolism ; Diarrhea, Infantile/*microbiology ; Escherichia coli/*metabolism ; Humans ; Rabbits ; Shiga Toxins
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  • 66
    Publication Date: 1984-07-27
    Description: Mutants of Sindbis virus were selected for rapid growth in baby hamster kidney (BHK) cell cultures and screened for attenuation of virulence in suckling mice. Comparisons among independently isolated virulent and attenuated strains, as well as a classical reversion analysis, showed that accelerated penetration of BHK cells was correlated with attenuation in vivo. Both phenotypic changes resulted from a reorganization of virion structure as detected by monoclonal antibodies. These results suggest that mutants selected for rapid growth in cell culture may be useful as attenuated vaccines and for studies of the molecular basis of virus pathogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olmsted, R A -- Baric, R S -- Sawyer, B A -- Johnston, R E -- AI19433/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Jul 27;225(4660):424-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6204381" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology ; Antibodies, Viral/immunology ; Cells, Cultured ; Cricetinae ; Kidney/cytology ; Mice ; Mutation ; Neutralization Tests ; RNA/biosynthesis ; Sindbis Virus/genetics/growth & development/immunology/*pathogenicity ; Togaviridae Infections/microbiology
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  • 67
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-02-03
    Description: The neurotoxin kainic acid caused dose-dependent morphological changes in horizontal cells of the retinas of adult cats and rabbits. High concentrations of kainic acid killed the cells, but when exposed to sublethal doses they contracted their dendritic fields and sent sprouting processes into the inner retina. It appears that kainic acid can induce neuronal growth as well as degeneration and that the potential for morphological plasticity is still present in neurons of the adult mammalian retina.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peichl, L -- Bolz, J -- New York, N.Y. -- Science. 1984 Feb 3;223(4635):503-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6691162" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Dendrites/ultrastructure ; Dose-Response Relationship, Drug ; Kainic Acid/*pharmacology ; Nerve Degeneration/drug effects ; Neurons/cytology/*drug effects ; Pyrrolidines/*pharmacology ; Rabbits ; Retina/cytology/*drug effects
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  • 68
    Publication Date: 1984-05-25
    Description: Cultured fibroblasts obtained from patients with tissue resistance to 1,25-dihydroxyvitamin D3 (vitamin D3--dependent rickets, type II) contain normal, low, or undetectable concentrations of this hormone's receptor protein as measured by a ligand-binding assay. Extracts from these cells were evaluated for receptors by immunoassay with a recently developed monoclonal antibody to the chick receptor. The results show that a protein sedimenting at 3.7S and recognizable by the antibody exists in comparable concentrations in cells from both normal and resistant patients, irrespective of the hormone-binding abnormalities of the cells. This implies that deficiencies in hormone binding associated with inherited tissue resistance to 1,25-dihydroxyvitamin D3 probably arise from structural variations in the receptor molecule and not from defective receptor synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pike, J W -- Dokoh, S -- Haussler, M R -- Liberman, U A -- Marx, S J -- Eil, C -- AM 15781/AM/NIADDK NIH HHS/ -- AM 32313/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 May 25;224(4651):879-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6326262" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal ; Cells, Cultured ; Fibroblasts/*analysis ; Humans ; Hypophosphatemia, Familial/*metabolism ; Radioimmunoassay ; Radioligand Assay ; Receptors, Calcitriol ; Receptors, Steroid/*analysis ; Skin/cytology
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  • 69
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-14
    Description: Exposure to insulin increased stimulus-evoked transmission at synapses formed in culture by cholinergic retinal neurons derived from fetal rats. This effect occurred at physiological concentrations and was long lasting. The findings support the hypothesis that insulin may serve as a developmental signal to regulate the emergence of effective neurotransmission across nascent synapses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Puro, D G -- Agardh, E -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1170-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089343" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Insulin/pharmacology/*physiology ; Muscles ; Neurons/*growth & development/physiology ; Parasympathetic Nervous System/physiology ; Rats ; Retina ; Synaptic Transmission ; Time Factors
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  • 70
    Publication Date: 1983-04-08
    Description: The involvement of plasma fibronectin in phagocytosis of bacteria was investigated by testing the binding of fibronectin to several species of bacteria and by evaluating the ability of fibronectin to promote binding and endocytosis of two species of these bacteria by phagocytic cells. Fibronectin binds non-covalently to Gram-positive and Gram-negative bacteria and to yeast but did not appear to be necessary or sufficient for uptake of Staphylococcus aureus and Salmonella typhimurium by several different phagocytic cell types.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van de Water, L -- Destree, A T -- Hynes, R O -- R01CA17007/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 8;220(4593):201-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6338594" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteria/*metabolism ; Cell Line ; Cricetinae ; Endocytosis ; Fibronectins/*metabolism ; Humans ; Macrophages/physiology ; Mice ; Opsonin Proteins/physiology ; *Phagocytosis ; Rabbits ; Salmonella typhimurium/metabolism ; Sepsis/immunology ; Staphylococcus aureus/metabolism
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-06-03
    Description: Dose-response studies of the inhibition of lipolysis by insulin in isolated human adipocytes were conducted with the use of a sensitive bioluminescent assay of glycerol release. The addition of glucose to the incubation medium was associated with an increase in insulin sensitivity and an increase in the maximum insulin effect. The results suggest that glucose plays an important role in regulating the antilipolytic action of insulin in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arner, P -- Bolinder, J -- Ostman, J -- New York, N.Y. -- Science. 1983 Jun 3;220(4601):1057-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6342138" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/cytology ; Cells, Cultured ; Dose-Response Relationship, Drug ; Drug Synergism ; Glucose/*pharmacology ; Humans ; Insulin/*pharmacology ; Isoproterenol/pharmacology ; Lipolysis/*drug effects
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  • 72
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-01-21
    Description: Mechanical constraints appear to require that locomotion and breathing be synchronized in running mammals. Phase locking of limb and respiratory frequency has now been recorded during treadmill running in jackrabbits and during locomotion on solid ground in dogs, horses, and humans. Quadrupedal species normally synchronize the locomotor and respiratory cycles at a constant ratio of 1:1 (strides per breath) in both the trot and gallop. Human runners differ from quadrupeds in that while running they employ several phase-locked patterns (4:1, 3:1, 2:1, 1:1, 5:2, and 3:2), although a 2:1 coupling ratio appears to be favored. Even though the evolution of bipedal gait has reduced the mechanical constraints on respiration in man, thereby permitting greater flexibility in breathing pattern, it has seemingly not eliminated the need for the synchronization of respiration and body motion during sustained running. Flying birds have independently achieved phase-locked locomotor and respiratory cycles. This hints that strict locomotor-respiratory coupling may be a vital factor in the sustained aerobic exercise of endothermic vertebrates, especially those in which the stresses of locomotion tend to deform the thoracic complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bramble, D M -- Carrier, D R -- New York, N.Y. -- Science. 1983 Jan 21;219(4582):251-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849136" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Gait ; Horses ; Humans ; *Locomotion ; Mammals ; *Physical Exertion ; Rabbits ; *Respiration
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  • 73
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-01-14
    Description: Heart cells were loaded with sodium by treatment with toxic doses of acetyl strophanthidin. After this treatment, an increase in extracellular calcium resulted in a transient net outward sodium flux against its electrochemical gradient and in net cellular uptake of calcium. It is concluded that the free energy for the net outward sodium movement was derived from the increased calcium gradient and that these ion movements took place through the sodium-calcium exchange. While in the normal physiological state the sodium-calcium exchange produces calcium extrusion from the cell, these experiments demonstrate its reversibility.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3521047/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3521047/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bridge, J H -- Bassingthwaighte, J B -- P41 RR001243/RR/NCRR NIH HHS/ -- P41 RR001243-190021/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1983 Jan 14;219(4581):178-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849128" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport, Active ; Calcium/*metabolism ; Cytoplasm/metabolism ; Membrane Potentials ; Myocardium/*metabolism ; Potassium/metabolism ; Rabbits ; Sarcolemma/metabolism ; Sodium/*metabolism
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  • 74
    Publication Date: 1983-10-21
    Description: Fluoride is one of the most potent but least well understood stimulators of bone formation in vivo. Bone formation was shown to arise from direct effects on bone cells. Treatment with sodium fluoride increased proliferation and alkaline phosphatase activity of bone cells in vitro and increased bone formation in embryonic calvaria at concentrations that stimulate bone formation in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Farley, J R -- Wergedal, J E -- Baylink, D J -- AM31061/AM/NIADDK NIH HHS/ -- AM31062/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 21;222(4621):330-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623079" target="_blank"〉PubMed〈/a〉
    Keywords: Alkaline Phosphatase/*metabolism ; Animals ; Bone Development/*drug effects ; Bone and Bones/*cytology/embryology/enzymology ; Cell Division/drug effects ; Cells, Cultured ; Chick Embryo ; Dose-Response Relationship, Drug ; Fluorides/*pharmacology ; Parathyroid Hormone/pharmacology
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  • 75
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-09-16
    Description: Shark cartilage contains a substance that strongly inhibits the growth of new blood vessels toward solid tumors, thereby restricting tumor growth. The abundance of this factor in shark cartilage, in contrast to cartilage from mammalian sources, may make sharks an ideal source of the inhibitor and may help to explain the rarity of neoplasms in these animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, A -- Langer, R -- EY04002/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 16;221(4616):1185-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6193581" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cartilage/*physiology ; Cell Line ; Cornea ; Neoplasms/*blood supply ; *Neovascularization, Pathologic ; Rabbits ; Sharks
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  • 76
    Publication Date: 1983-09-23
    Description: Noise analysis of rabbit bladder revealed two components: Lorentzian noise, arising from interaction of amiloride with the Na+ channel, and flicker noise (l/f, where f is frequency), as in other biological membranes. Hydrostatic pressure, which causes exchange between intracellular vesicular membrane and apical membrane, increases the number but not the single-channel current of the amiloride-sensitive channels. Flicker noise arises from degraded channels that have lost amiloride sensitivity and Na+ to K+ selectivity. The degraded channels were selectively removed by washing the mucosal surface. These results imply channel turnover by intracellular synthesis, transfer from vesicular to apical membrane, degradation, and elimination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loo, D D -- Lewis, S A -- Ifshin, M S -- Diamond, J M -- AM17327/AM/NIADDK NIH HHS/ -- AM20851/AM/NIADDK NIH HHS/ -- GM14772/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 23;221(4617):1288-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612343" target="_blank"〉PubMed〈/a〉
    Keywords: Amiloride/pharmacology ; Animals ; Cell Membrane/metabolism ; Cytoplasmic Granules/metabolism ; Epithelium/physiology ; Rabbits ; Sodium/*metabolism ; Urinary Bladder/*metabolism
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  • 77
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-03-25
    Description: Anchorage-dependent cell growth is demonstrated on microcarriers of fluorocarbon fluid formed by emulsification and stabilized with polylysine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keese, C R -- Giaever, I -- New York, N.Y. -- Science. 1983 Mar 25;219(4591):1448-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6828872" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; Cell Division ; *Cell Physiological Phenomena ; Cells, Cultured ; Culture Media ; Emulsions ; Fluorocarbons ; Kinetics
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  • 78
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-09-09
    Description: Peptidergic-noradrenergic interactions were examined in explants of rat sympathetic superior cervical ganglia and in cultures of dissociated cells. The putative peptide transmitters substance P and somatostatin each increased the activity of the catecholamine-synthesizing enzyme tyrosine hydroxylase after 1 week of exposure in culture. Maximal increases occurred at 10(-7) molar for each peptide, and either increasing or decreasing the concentration reduced the effects. Similar increases in tyrosine hydroxylase were produced by a metabolically stable agonist of substance P, while a substance P antagonist prevented the effects of the agonist. The data suggest that the increased tyrosine hydroxylase activity was mediated by peptide interaction with specific substance P receptors and that peptides may modulate sympathetic catecholaminergic function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kessler, J A -- Adler, J E -- Black, I B -- New York, N.Y. -- Science. 1983 Sep 9;221(4615):1059-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6192502" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacitracin/pharmacology ; Captopril/pharmacology ; Cells, Cultured ; Culture Techniques ; Dose-Response Relationship, Drug ; Ganglia, Sympathetic/*enzymology ; Rats ; Somatostatin/*pharmacology ; Substance P/*pharmacology ; Tyrosine 3-Monooxygenase/*metabolism
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  • 79
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-02-25
    Description: The electrical activity of macrophages derived from human blood monocytes was recorded in vitro with intracellular microelectrodes and was analyzed with computer-assisted data acquisition and analysis techniques. In cells impaled 6 to 8 days after the cultures were prepared, the resting potentials reached a maximum value of -72 millivolts. The cells were electrically excitable; spikes exhibited a slow upstroke, a fast downstroke, a discrete threshold, a large overshoot, and a brief undershoot. Repetitive firing was induced by a maintained depolarizing current. A positive relation was observed between transmembrane currents and resting potential. Voltage-current relations were nonrectifying for subthreshold current injections. Since these cells had not been treated with any specific activation factors, the electrical activity recorded is evidence for the presence of voltage-dependent inward and outward currents in the membranes of mature macrophages. The electrical signals generated by these cells may be useful for the assay of sensor and effector functions of macrophages, such as chemotaxis, receptor-ligand interactions, and phagocytosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCann, F V -- Cole, J J -- Guyre, P M -- Russell, J A -- AM0535/AM/NIADDK NIH HHS/ -- BRSG05392/RS/DRS NIH HHS/ -- CA17323/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Feb 25;219(4587):991-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6823563" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Cell Differentiation ; Cells, Cultured ; Humans ; Macrophages/*physiology ; Monocytes/cytology
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  • 80
    Publication Date: 1983-07-08
    Description: Centrally administered alpha-melanocyte stimulating hormone is much more potent in reducing fever than the widely used antipyretic acetaminophen. This finding supports the hypothesis that the endogenous neuropeptide has a role in the limitation of fever and suggests that it may be clinically useful as an antipyretic.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murphy, M T -- Richards, D B -- Lipton, J M -- NS 10046/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 8;221(4606):192-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6602381" target="_blank"〉PubMed〈/a〉
    Keywords: Acetaminophen/pharmacology ; Animals ; Anti-Inflammatory Agents, Non-Steroidal/*pharmacology ; Body Temperature/drug effects ; Dose-Response Relationship, Drug ; Fever/drug therapy ; Humans ; Melanocyte-Stimulating Hormones/*pharmacology ; Rabbits
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  • 81
    Publication Date: 1983-11-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1983 Nov 11;222(4624):602-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6635658" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle ; Cells, Cultured ; Mice ; *Oncogenes ; Platelet-Derived Growth Factor/*genetics
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  • 82
    Publication Date: 1983-08-19
    Description: Lysates of the protozoan parasite Entamoeba histolytica altered active electrolyte transport when present on the serosal surface of rabbit ileum and rat colon. The lysate-induced effects on electrolyte transport were similar to those caused by serotonin, and were blocked by bufotenine, an analog known to inhibit the action of serotonin. The transport effects were partially inhibited by antibody to serotonin. The amebic lysates were shown to contain serotonin by radioimmunoassay, high-performance liquid chromatography, and thin-layer chromatography. These results suggest that the serotonin present in Entamoeba histolytica may be important in the diarrhea seen in amebiasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGowan, K -- Kane, A -- Asarkof, N -- Wicks, J -- Guerina, V -- Kellum, J -- Baron, S -- Gintzler, A R -- Donowitz, M -- AM26523/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Aug 19;221(4612):762-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6308760" target="_blank"〉PubMed〈/a〉
    Keywords: Amebiasis/*physiopathology ; Animals ; Biological Transport ; Colon/physiopathology ; Diarrhea/physiopathology ; Disease Models, Animal ; Entamoeba histolytica/*physiology ; Entamoebiasis/*physiopathology ; Ileum/physiopathology ; Intestinal Absorption ; Rabbits ; Rats ; Serotonin/*physiology
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  • 83
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-06-24
    Description: Human G gamma-globin genes containing tandem duplications of the donor (5') or acceptor (3') RNA splice sites of the second intervening sequence were constructed in order to ascertain the directionality of RNA splice site selection. These genes were introduced into cultured monkey cells, and their transcripts were analyzed. Transcripts of these duplication variants were spliced only at the proximal copy of the duplicated splice sites. These data are consistent with a 5' leads to 3' model of splice site selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lang, K M -- Spritz, R A -- AM28598/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Jun 24;220(4604):1351-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6304877" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cells, Cultured ; Globins/genetics ; Haplorhini ; Humans ; Plasmids ; *RNA Splicing ; RNA, Messenger/genetics/physiology ; Simian virus 40/genetics ; Transcription, Genetic
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  • 84
    Publication Date: 1983-09-09
    Description: Vasoactive intestinal peptide stimulated the synthesis of adenosine 3',5'-monophosphate in fractions of isolated carp horizontal cells. When applied extracellularly to isolated and cultured horizontal cells, the peptide also induced a slow depolarization (30 to 40 millivolts) accompanied by a decrease in membrane resistance. However, analogs of adenosine 3',5'-monophosphate applied extracellularly or intracellularly, and forscolin applied extracellularly, had no effect on the membrane potential of cultured horizontal cells, indicating that the induced depolarization was not related to the accumulation of adenosine 3',5'-monophosphate in these cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lasater, E M -- Watling, K J -- Dowling, J E -- EY-00811/EY/NEI NIH HHS/ -- EY-00824/EY/NEI NIH HHS/ -- EY-05476/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 9;221(4615):1070-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6308770" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carps ; Cells, Cultured ; Cyclic AMP/*metabolism ; Dopamine/pharmacology ; Gastrointestinal Hormones/*pharmacology ; Kainic Acid/pharmacology ; Membrane Potentials/*drug effects ; Retina/*drug effects/physiology ; Vasoactive Intestinal Peptide/*pharmacology
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  • 85
    Publication Date: 1983-04-29
    Description: The antigen defined by a rat monoclonal antibody directed to a Burkitt lymphoma cell line was identified as globotriaosylceramide [Gal alpha (1 leads to 4)-Gal beta (1 leads to 4)-Glc beta (1 leads to 1)-ceramide]. The antibody demonstrated a strict steric specificity since it did not react with globoisotriaosylceramide [Gal alpha (1 leads to 3)-Gal beta (1 leads to 4)-Glc beta (1 leads to 1)-ceramide], the positional isomer of the antigen associated with the Burkitt lymphoma. Chemical analysis of various Burkitt lymphoma cell lines revealed that the Burkitt lymphoma cells contained more than 100 times as much of the glycolipid antigen as was found in other human lymphoma and leukemia cell lines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nudelman, E -- Kannagi, R -- Hakomori, S -- Parsons, M -- Lipinski, M -- Wiels, J -- Fellous, M -- Tursz, T -- CA 19224/CA/NCI NIH HHS/ -- CA 20026/CA/NCI NIH HHS/ -- GM 23100/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 29;220(4596):509-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836295" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*immunology ; Antigens, Neoplasm/*immunology ; Burkitt Lymphoma/*immunology ; Cell Line ; Cell Transformation, Neoplastic/metabolism ; Erythrocytes/immunology ; Globosides/*immunology ; Glycosphingolipids/*immunology ; Humans ; Rabbits ; Rats ; *Trihexosylceramides
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  • 86
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-09-02
    Description: Fusion of immortal cell lines with normal human fibroblasts or certain other immortal cell lines yields hybrids having limited division potential. Cellular immortality was found to be a recessive phenotype in hybrids. It was also found that at least two separate events in the normal cell genome can result in immortality. In fusions involving certain immortal parent cells, these events can be complemented to result in hybrids with finite division capacity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pereira-Smith, O M -- Smith, J R -- AG 03262/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 2;221(4614):964-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879195" target="_blank"〉PubMed〈/a〉
    Keywords: *Cell Division ; Cell Line ; *Cell Survival ; Cells, Cultured ; Genes, Recessive ; Humans ; Hybrid Cells/*physiology ; Phenotype
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  • 87
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-03-25
    Description: Cultured tobacco plant cells activated 2-aminofluorene to an agent mutagenic to Salmonella typhimurium strain TA98. The plant activation of 2-aminofluorene is heat-inactivated and may not involve solely cytochrome P-450. The kinetics of activation demonstrated both time- and concentration-dependent responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Plewa, M J -- Weaver, D L -- Blair, L C -- Gentile, J M -- ES02384/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 25;219(4591):1427-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6338591" target="_blank"〉PubMed〈/a〉
    Keywords: Biotransformation ; Cells, Cultured ; Fluorenes/*metabolism/pharmacology ; Kinetics ; Mutagenicity Tests ; Mutagens/*metabolism ; *Mutation ; *Plants, Toxic ; Salmonella typhimurium/drug effects ; Tobacco/*metabolism
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  • 88
    Publication Date: 1983-02-18
    Description: Nine new isolates of human T-cell leukemia-lymphoma virus (HTLV) were obtained from cells of seven patients with malignancies of mature T cells and from two clinically normal relatives of a T-cell leukemia patient. These people were from the United States, Israel, the West Indies, and Japan. The virus was detected in the fresh T cells and was isolated from the established T-cell lines. Each isolate is closely related to the first HTLV isolate, and all the new HTLV isolates were transmitted into normal human T cells obtained from the umbilical cord blood of newborns.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Popovic, M -- Sarin, P S -- Robert-Gurroff, M -- Kalyanaraman, V S -- Mann, D -- Minowada, J -- Gallo, R C -- New York, N.Y. -- Science. 1983 Feb 18;219(4586):856-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6600519" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Cells, Cultured ; Female ; Humans ; Leukemia/*microbiology ; Male ; Retroviridae/growth & development/*isolation & purification ; T-Lymphocytes/*microbiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-04-15
    Description: Isolated rat hepatocytes in primary culture were used as a model system to evaluate the effects of selected hormones and culture conditions on the efflux of calcium-45 and lead-210 from cells labeled with these isotopes. Alpha-adrenergic stimuli, angiotensin, vasopressin, dibutyryl adenosine 3',5'-monophosphate, and reduced phosphate concentrations in the medium increased the efflux of calcium-45 and lead-210. Glucagon and insulin had no effect, but increased phosphate concentrations decreased the efflux of both isotopes. Experiments with hepatocytes cultured in a medium free of calcium and lead demonstrated that the increased efflux of calcium-45 and lead-210 induced by hormones was the result of mobilization of the ions from intracellular stores. The data indicate that the physiological stimuli that mobilized calcium ions also mobilized lead ions, and that the mobilized lead would be available to interact with calcium-mediated cell functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pounds, J G -- Mittelstaedt, R A -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):308-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6301003" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin II/pharmacology ; Animals ; Bucladesine/pharmacology ; Calcium Radioisotopes/*metabolism ; Cells, Cultured ; Epinephrine/pharmacology ; Insulin/pharmacology ; Lead/*metabolism ; Liver/cytology ; Phosphates/pharmacology ; Propranolol/pharmacology ; Radioisotopes ; Rats ; Vasopressins/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 90
    Publication Date: 1983-04-15
    Description: Alkylating agents that display strong selectivity for opiate receptor types delta or mu were prepared by appropriate modification of the structures of the strong analgesics fentanyl, etonitazene, and endoethenotetrahydrooripavine. The availability of these substances should facilitate studies of the structural basis of receptor specificity and of the physiologic roles of these receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rice, K C -- Jacobson, A E -- Burke, T R Jr -- Bajwa, B S -- Streaty, R A -- Klee, W A -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):314-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6132444" target="_blank"〉PubMed〈/a〉
    Keywords: Alkylation ; Animals ; Benzimidazoles/analogs & derivatives/metabolism ; Brain/physiology ; Cells, Cultured ; Chemical Phenomena ; Chemistry ; Enkephalin, Methionine/analogs & derivatives/metabolism ; Fentanyl/analogs & derivatives/metabolism ; *Isothiocyanates ; Ligands ; Rats ; Receptors, Opioid/*metabolism/physiology ; Thebaine/analogs & derivatives/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 91
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-09-23
    Description: The lung colonization of B16-F1 cells grown in flat and spherical configurations was studied. Cells cultivated in vitro as spheroids on a nonadhesive substrate expressed in a reversible fashion a marked increase in their propensity to establish metastases. The altered metastatic capability was accompanied by a reversible reduction in the accessibility of cell surface proteins to external iodination and by a dramatic decrease in the synthesis of vimentin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raz, A -- Ben-Ze'ev, A -- New York, N.Y. -- Science. 1983 Sep 23;221(4617):1307-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612347" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; Cell Division ; Cells, Cultured ; Intermediate Filament Proteins/biosynthesis ; Lung Neoplasms/secondary ; Melanoma/*pathology ; Membrane Proteins/physiology ; Mice ; *Neoplasm Metastasis ; Neoplasm Proteins/physiology ; Neoplasms, Experimental/pathology ; Vimentin
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  • 92
    Publication Date: 1983-05-20
    Description: A retrovirus belonging to the family of recently discovered human T-cell leukemia viruses (HTLV), but clearly distinct from each previous isolate, has been isolated from a Caucasian patient with signs and symptoms that often precede the acquired immune deficiency syndrome (AIDS). This virus is a typical type-C RNA tumor virus, buds from the cell membrane, prefers magnesium for reverse transcriptase activity, and has an internal antigen (p25) similar to HTLV p24. Antibodies from serum of this patient react with proteins from viruses of the HTLV-I subgroup, but type-specific antisera to HTLV-I do not precipitate proteins of the new isolate. The virus from this patient has been transmitted into cord blood lymphocytes, and the virus produced by these cells is similar to the original isolate. From these studies it is concluded that this virus as well as the previous HTLV isolates belong to a general family of T-lymphotropic retroviruses that are horizontally transmitted in humans and may be involved in several pathological syndromes, including AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barre-Sinoussi, F -- Chermann, J C -- Rey, F -- Nugeyre, M T -- Chamaret, S -- Gruest, J -- Dauguet, C -- Axler-Blin, C -- Vezinet-Brun, F -- Rouzioux, C -- Rozenbaum, W -- Montagnier, L -- New York, N.Y. -- Science. 1983 May 20;220(4599):868-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6189183" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*microbiology ; Adult ; Animals ; Antibodies, Viral/immunology ; Cells, Cultured ; Humans ; Male ; Microscopy, Electron ; RNA-Directed DNA Polymerase/metabolism ; Retroviridae/*isolation & purification ; T-Lymphocytes/microbiology ; Tumor Virus Infections/*microbiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 93
    Publication Date: 1983-01-14
    Description: Acetylcholine receptors are present in the sarcolemma of cultured skeletal muscle myotubes either as large clusters or in a diffuse distribution. Both the clustered and diffuse acetylcholine receptors are potentially removable from the membrane. Treatment of myotubes with globulin from patients with myasthenia gravis causes the loss of acetylcholine receptor clusters and the concomitant appearance of acetylcholine receptor microaggregates. The rate of acetylcholine receptor cluster loss is greater than the rate of acetylcholine receptor degradation, indicating that acetylcholine receptors are disrupted from clusters to form microaggregates before being removed from the plasma membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bursztajn, S -- McManaman, J L -- Elias, S B -- Appel, S H -- New York, N.Y. -- Science. 1983 Jan 14;219(4581):195-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849132" target="_blank"〉PubMed〈/a〉
    Keywords: *Autoantibodies ; Cells, Cultured ; Humans ; Immunologic Capping ; Macromolecular Substances ; Membrane Proteins/metabolism ; Myasthenia Gravis/*immunology ; Pinocytosis ; Receptors, Cholinergic/immunology/*metabolism
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  • 94
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-04-15
    Description: Isolated human heart cells were partially drawn into the lumen of a plastic tube and cleaved at the partitioning tube wall by intraluminal suction pulses. The extraluminal segment (10 to 20 percent of the cell length) was suitable for intracellular perfusion and voltage clamp. The time and voltage dependence of the sodium current, and the responses to changes in driving force and channel blockers, illustrate the potential of these preparations as models for the study of membrane channels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bustamante, J O -- McDonald, T F -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):320-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6301004" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Humans ; Ion Channels/drug effects ; Lidocaine/pharmacology ; Membrane Potentials/drug effects ; Myocardium/*cytology/metabolism ; Sodium/*metabolism/physiology ; Tetrodotoxin/pharmacology
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  • 95
    Publication Date: 1983-05-13
    Description: Certain human glioma lines produce mucopolysaccharide coats that impair the generation of cytolytic lymphocytes in response to these lines in vitro. Coat production is substantially enhanced by the interaction of glioma cells with a macromolecular factor released by human peripheral blood mononuclear cells in culture. This interaction thus constitutes an unusual mechanism by which inflammatory cells may nonspecifically suppress the cellular immune response to at least one class of solid tumors in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dick, S J -- Macchi, B -- Papazoglou, S -- Oldfield, E H -- Kornblith, P L -- Smith, B H -- Gately, M K -- New York, N.Y. -- Science. 1983 May 13;220(4598):739-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6220469" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cytotoxicity, Immunologic ; Glioma/immunology/*metabolism ; Glycosaminoglycans/biosynthesis ; Humans ; Hyaluronoglucosaminidase/metabolism ; Immunity, Cellular ; Lymphocytes/immunology/*metabolism ; Mice ; Rabbits
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  • 96
    Publication Date: 1983-02-18
    Description: The biological response modifier human beta-interferon had pronounced antigrowth effects on various histologic types of human brain tumor cells but no effects on a nontransformed cell line, MRC-5. The cultures of brain tumor cells showed severe alterations indicative of cell injury and death after exposure to beta-interferon for 2 to 6 days. Similar results were obtained with cells freshly explanted from human brain tumors. The results indicate that it may be possible to use fresh, explanted tumor tissue to identify patients who might benefit from therapy with beta-interferon.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cook, A W -- Carter, W A -- Nidzgorski, F -- Akhtar, L -- New York, N.Y. -- Science. 1983 Feb 18;219(4586):881-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6401866" target="_blank"〉PubMed〈/a〉
    Keywords: Brain Neoplasms/pathology/*therapy ; Cell Division ; Cells, Cultured ; Humans ; Interferon-gamma/pharmacology/*therapeutic use
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  • 97
    Publication Date: 1983-08-19
    Description: Heparin or a heparin fragment administered with cortisone inhibited angiogenesis, caused regression of large tumor masses, and prevented metastases. Oral administration of heparin resulted in the release of non-anticoagulant heparin fragments in the serum which, in the presence of cortisone, had similar anti-angiogenic and antitumor effects. Of all the heparin fragments tested, the most potent inhibition of angiogenesis in the presence of cortisone was provided by a hexasaccharide with a molecular weight of about 1600.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Folkman, J -- Langer, R -- Linhardt, R J -- Haudenschild, C -- Taylor, S -- EY04002/EY/NEI NIH HHS/ -- GM25810/GM/NIGMS NIH HHS/ -- R01-CA14019/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Aug 19;221(4612):719-25.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6192498" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antineoplastic Agents ; Chick Embryo ; Cortisone/*pharmacology ; Heparin/*pharmacology ; Inflammation ; Neoplasm Metastasis ; Neoplasms, Experimental/blood supply ; Neovascularization, Pathologic/*physiopathology ; Oligosaccharides/pharmacology ; Rabbits ; Structure-Activity Relationship
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 98
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, J L -- New York, N.Y. -- Science. 1983 Dec 23;222(4630):1318.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6140756" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior ; Behavior, Animal ; Brain/*physiology ; Haplorhini ; Humans ; Memory/*physiology ; Neurotransmitter Agents/physiology ; Rabbits
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  • 99
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-09-02
    Description: Interferon-treated cells rapidly and efficiently transferred the antiproliferative activity of interferon to untreated cells. This phenomenon was not due to the carry-over of interferon by the interferon-treated cells. Thus, to evoke an antiproliferative state, interferon did not directly contact each cell in a population. The results suggest a novel mechanism by which interferon may indirectly regulate cell growth, and suggests that cells other than those of the immune system may play a role in controlling tumor growth in tissue where cell-to-cell contact occurs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lloyd, R E -- Blalock, J E -- Stanton, G J -- 03348/PHS HHS/ -- AM 30046/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 2;221(4614):953-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6192500" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Communication ; Cell Division/*drug effects ; Cells, Cultured ; Humans ; Interferons/*pharmacology ; Leukemia L1210 ; Mice ; Species Specificity
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  • 100
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1983-06-24
    Description: Gel filtration of serum at pH 3.6 yielded a fraction that supported long-term (months) survival of dissociated rat central neurons in monolayer culture more reliably than the traditionally used unfractionated serum. The cultures remained neuron-rich, because this fraction did not support the proliferation of glia and fibroblasts that occurs in whole serum. With an apparent molecular weight of 55,000 and an isoelectric point of 5.6, the active factor (or factors) in this fraction is distinct from any well-defined growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaufman, L M -- Barrett, J N -- NS07044/NS/NINDS NIH HHS/ -- NS12207/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jun 24;220(4604):1394-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857258" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; *Cell Survival/drug effects ; Cells, Cultured ; Chromatography, Gel ; Horses ; Isoelectric Focusing ; Molecular Weight ; Nerve Growth Factors/isolation & purification/*pharmacology ; Neurons/drug effects/*physiology ; Rats ; Rats, Inbred Strains ; Spinal Cord/cytology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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