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  • Articles  (28)
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  • Science. 235(4786): 345-8.  (1)
  • Science. 235(4787): 473-6.  (1)
  • Science. 235(4789): 680-2.  (1)
  • Science. 236(4798): 175-80.  (1)
  • Science. 236(4802): 714-8.  (1)
  • Science. 236(4803): 819-22.  (1)
  • Science. 236(4803): 843-5.  (1)
  • Science. 236(4804): 954-7.  (1)
  • Science. 236(4804): 959-62.  (1)
  • Science. 237(4811): 187-9.  (1)
  • Science. 237(4813): 402-5.  (1)
  • Science. 237(4815): 645-7.  (1)
  • Science. 237(4815): 648-50.  (1)
  • Science. 237(4817): 888-93.  (1)
  • Science. 237(4817): 901-3.  (1)
  • Science. 237(4818): 1036-9.  (1)
  • Science. 237(4818): 1047-51.  (1)
  • Science. 237(4820): 1309-16.  (1)
  • Science. 238(4823): 72-5.  (1)
  • Science. 238(4824): 202-5.  (1)
  • 25
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  • Articles  (28)
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  • American Association for the Advancement of Science (AAAS)  (28)
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  • 1
    Publication Date: 1987-10-23
    Description: Exposure to bacterial endotoxins has long been known to stimulate the release of anterior pituitary hormones; administration of endotoxin was at one time a common clinical test of anterior pituitary function. Endotoxin is a potent stimulus for production of the endogenous pyrogenic protein, interleukin-1 (IL-1), by macrophages and monocytes. The possibility that IL-1 has a direct effect on the secretion of hormones by rat pituitary cells in a monolayer culture was investigated. Recombinant human IL-1 beta stimulated the secretion of adrenocorticotropic hormone, luteinizing hormone, growth hormone, and thyroid-stimulating hormone. Increased hormone secretion into culture supernatants was found with IL-1 concentrations ranging from 10(-9) M to 10(-12) M. Prolactin secretion by the monolayers was inhibited by similar doses. These concentrations of IL-1 are within the range reported for IL-1 in serum, suggesting that IL-1 generated peripherally by mononuclear immune cells may act directly on anterior pituitary cells to modulate hormone secretion in vivo. Incubation of IL-1 solutions with antibody to IL-1 neutralized these actions. These pituitary effects of IL-1 suggest that this monokine may be an important regulator of the metabolic adaptations to infectious stressors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bernton, E W -- Beach, J E -- Holaday, J W -- Smallridge, R C -- Fein, H G -- New York, N.Y. -- Science. 1987 Oct 23;238(4826):519-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuropsychiatry, Walter Reed Army Institute of Research, Washington, D.C. 20307-5100.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2821620" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/secretion ; Animals ; Cells, Cultured ; Dinoprostone ; Female ; Growth Hormone/secretion ; Humans ; Infection/physiopathology ; Inflammation/physiopathology ; Interleukin-1/*physiology ; Luteinizing Hormone/secretion ; Pituitary Gland, Anterior/*secretion ; Pituitary Hormones, Anterior/*secretion ; Prolactin/secretion ; Prostaglandins E/secretion ; Rats ; Rats, Inbred Strains ; Recombinant Proteins/pharmacology ; Thyrotropin/secretion
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1987-08-28
    Description: Li-Fraumeni syndrome is manifested in a variety of neoplasms that are transmitted in a dominantly inherited pattern. The noncancerous skin fibroblasts of family members exhibit a unique characteristic of being resistant to the killing effect of ionizing radiation. A three- to eightfold elevation in expression of c-myc and an apparent activation of c-raf-1 gene have been observed in these noncancerous skin fibroblasts. These results may provide insight into the heritable defect underlying the familial predisposition to a variety of cancers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, E H -- Pirollo, K F -- Zou, Z Q -- Cheung, H Y -- Lawler, E L -- Garner, R -- White, E -- Bernstein, W B -- Fraumeni, J W Jr -- Blattner, W A -- CA45158/CA/NCI NIH HHS/ -- CO7488/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 28;237(4818):1036-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3616624" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Transformation, Neoplastic/radiation effects ; Cells, Cultured ; Fibroblasts/*radiation effects ; Humans ; Mice ; Mice, Nude ; Neoplastic Syndromes, Hereditary/*genetics ; Oncogenes/*radiation effects ; Pedigree ; *Radiation Tolerance ; Skin/cytology/*radiation effects ; Syndrome
    Print ISSN: 0036-8075
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  • 3
    Publication Date: 1987-10-09
    Description: Oncogenes encoding serine/threonine or tyrosine kinases were introduced into the established rodent fibroblast cell line NIH 3T3 and tested for tumorigenic and metastatic behavior in T cell-deficient nude mice. Transforming oncogenes of the ras family were capable of converting fibroblast cell lines to fully metastatic tumors. Cell lines transformed by the kinase oncogenes mos, raf, src, fes, and fms formed experimental metastases and (in some cases) these genes were more efficient at metastatic conversion than a mutant ras gene. In contrast, cells transformed by either of two nuclear oncogenes, myc or p53, were tumorigenic when injected subcutaneously but were virtually nonmetastatic after intravenous injection. These data demonstrate that, in addition to ras, a structurally divergent group of kinase oncogenes can induce the metastatic phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Egan, S E -- Wright, J A -- Jarolim, L -- Yanagihara, K -- Bassin, R H -- Greenberg, A H -- New York, N.Y. -- Science. 1987 Oct 9;238(4824):202-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Manitoba Institute of Cell Biology, University of Manitoba, Winnipeg, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3659911" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Transformation, Neoplastic ; Cells, Cultured ; *Genes ; Mice ; *Neoplasm Metastasis ; *Oncogenes ; Phenotype ; Protein Kinases/*genetics
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1987-08-21
    Description: The molecular basis for the marked difference between primate and rodent cells in sensitivity to the cardiac glycoside ouabain has been established by genetic techniques. A complementary DNA encoding the entire alpha 1 subunit of the mouse Na+- and K+-dependent adenosine triphosphatase (ATPase) was inserted into the expression vector pSV2. This engineered DNA molecule confers resistance against 10(-4) M ouabain to monkey CV-1 cells. Deletion of sequences encoding the carboxyl terminus of the alpha 1 subunit abolish the activity of the complementary DNA. The ability to assay the biological activity of this ATPase in a transfection protocol permits the application of molecular genetic techniques to the analysis of structure-function relationships for the enzyme that establishes the internal Na+/K+ environment of most animal cells. The full-length alpha 1 subunit complementary DNA will also be useful as a dominant selectable marker for somatic cell genetic studies utilizing ouabain-sensitive cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kent, R B -- Emanuel, J R -- Ben Neriah, Y -- Levenson, R -- Housman, D E -- CA-07919/CA/NCI NIH HHS/ -- CA-26712/CA/NCI NIH HHS/ -- CA-38992/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 21;237(4817):901-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3039660" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cercopithecus aethiops ; DNA/genetics ; Drug Resistance ; Gene Expression Regulation ; Macromolecular Substances ; Mice ; Ouabain/*pharmacology ; Sodium-Potassium-Exchanging ATPase/antagonists & inhibitors/*genetics ; Species Specificity ; Structure-Activity Relationship ; Transfection
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-05-15
    Description: Neoplasms produce substances that induce blood vessel formation (angiogenesis). Fractions from ethanol extracts of the Walker 256 carcinoma were isolated by silica column chromatography and C18 reversed-phase high-performance liquid chromatography. Two of the isolated fractions induced neovascularization when tested in the rabbit corneal micropocket assay. One of the fractions was identified as nicotinamide by desorption-electron impact mass spectrometry, nuclear magnetic resonance spectroscopy, and gas chromatography-mass spectrometry. The second active fraction contained nicotinamide as part of a more complex, as yet unidentified, molecular arrangement. Microgram quantities of commercial nicotinamide induced neovascularization in the corneal micropocket assay and in the chick chorioallantoic membrane assay.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kull, F C Jr -- Brent, D A -- Parikh, I -- Cuatrecasas, P -- New York, N.Y. -- Science. 1987 May 15;236(4803):843-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2437656" target="_blank"〉PubMed〈/a〉
    Keywords: Angiogenesis Inducing Agents/*isolation & purification/pharmacology ; Animals ; Carcinoma 256, Walker/*physiopathology ; Cells, Cultured ; Chick Embryo ; Cornea/blood supply ; Endothelium/cytology/drug effects ; Gas Chromatography-Mass Spectrometry ; Growth Substances/*isolation & purification ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Mice ; Neovascularization, Pathologic ; Niacinamide/isolation & purification/pharmacology
    Print ISSN: 0036-8075
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  • 6
    Publication Date: 1987-10-02
    Description: Epidermal growth factor (EGF) is a potent polypeptide mitogen originally isolated from the adult male mouse submaxillary gland. It also acts as a gastrointestinal hormone. EGF-immunoreactive material has recently been identified within neuronal fibers and terminals in rodent brain. In the present study, EGF was found to enhance survival and process outgrowth of primary cultures of subneocortical telencephalic neurons of neonatal rat brain in a dose-dependent manner. This effect was observed with EGF concentrations as low as 100 picograms per milliliter (0.016 nanomolar) and was dependent on the continuous presence of EGF in the medium. Similar effects were observed with basic fibroblast growth factor, but several other growth-promoting substances, including other mitogens for glial elements, were without effect. Thus EGF, in addition to its mitogenic and hormonal activities, may act as a neurite elongation and maintenance factor for select neurons of the rodent central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morrison, R S -- Kornblum, H I -- Leslie, F M -- Bradshaw, R A -- NS19319/NS/NINDS NIH HHS/ -- NS19964/NS/NINDS NIH HHS/ -- T32-CA0905A/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1987 Oct 2;238(4823):72-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry, College of Medicine, University of California, Irvine 92717.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3498986" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Brain/*cytology ; Cell Survival/drug effects ; Cells, Cultured ; Epidermal Growth Factor/*physiology ; Growth Substances/pharmacology ; Rats
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  • 7
    Publication Date: 1987-07-10
    Description: Inhibin is a gonadal glycoprotein hormone that regulates the production of follicle-stimulating hormone (FSH) by the anterior pituitary gland and exhibits intragonadal actions as well. The present study shows that inhibin-like immunoreactivity (inhibin-LI) is present in cells of the cytotrophoblast layer of human placenta at term and in primary cultures of human trophoblasts. Human chorionic gonadotropin (hCG) stimulated secretion of inhibin-LI from these cultured placental cells. This effect was mimicked by 8-bromo-cyclic adenosine monophosphate (8-bromo-cAMP), forskolin, and cholera toxin, suggesting that the mechanism of hCG induction of placental inhibin-LI secretion is cAMP-dependent. Incubation with an antiserum that binds the alpha-subunit of human inhibin increased the secretion of hCG and gonadotropin-releasing hormone-like immunoreactivity (GnRH-LI) from trophoblast cells in culture, suggesting a local tonic inhibitory action of endogenous inhibin on hCG and GnRH-LI release. The action of inhibin on hCG secretion may partially require the presence of placental GnRH, as suggested by evidence that a synthetic GnRH antagonist partially reverses the hCG increase induced by inhibin immunoneutralization. Results suggest paracrine roles for both inhibin and GnRH in the regulation of placental hCG production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petraglia, F -- Sawchenko, P -- Lim, A T -- Rivier, J -- Vale, W -- AM26741/AM/NIADDK NIH HHS/ -- HD13527/HD/NICHD NIH HHS/ -- NS21182/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 10;237(4811):187-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3299703" target="_blank"〉PubMed〈/a〉
    Keywords: 8-Bromo Cyclic Adenosine Monophosphate/pharmacology ; Cells, Cultured ; Cholera Toxin/pharmacology ; Chorionic Gonadotropin/pharmacology/*secretion ; Chorionic Villi/analysis ; Colforsin/pharmacology ; Feedback ; Female ; Gonadotropin-Releasing Hormone/antagonists & inhibitors/pharmacology/secretion ; Humans ; Infant, Newborn ; Inhibins/analysis/*physiology ; Male ; Pregnancy ; Secretory Rate/drug effects ; Trophoblasts/analysis/drug effects/*secretion
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 1987-09-11
    Description: The validity of mouse liver tumor end points in assessing the potential hazards of chemical exposure to humans is a controversial but important issue, since liver neoplasia in mice is the most frequent tumor target tissue end point in 2-year carcinogenicity studies. The ability to distinguish between promotion of background tumors versus a genotoxic mechanism of tumor initiation by chemical treatment would aid in the interpretation of rodent carcinogenesis data. Activated oncogenes in chemically induced and spontaneously occurring mouse liver tumors were examined and compared as one approach to determine the mechanism by which chemical treatment caused an increased incidence of mouse liver tumors. Data suggest that furan and furfural caused an increased incidence in mouse liver tumors at least in part by induction of novel weakly activating point mutations in ras genes even though both chemicals did not induce mutations in Salmonella assays. In addition to ras oncogenes, two activated raf genes and four non-ras transforming genes were detected. The B6C3F1 mouse liver may thus provide a sensitive assay system to detect various classes of proto-oncogenes that are susceptible to activation by carcinogenic insult. As illustrated with mouse liver tumors, analysis of activated oncogenes in spontaneously occurring and chemically induced rodent tumors will provide information at a molecular level to aid in the use of rodent carcinogenesis data for risk assessment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reynolds, S H -- Stowers, S J -- Patterson, R M -- Maronpot, R R -- Aaronson, S A -- Anderson, M W -- New York, N.Y. -- Science. 1987 Sep 11;237(4820):1309-16.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3629242" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Liver Neoplasms/*genetics ; Mice ; Mutation ; Nucleic Acid Hybridization ; *Oncogenes ; *Proto-Oncogenes ; Risk
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  • 9
    Publication Date: 1987-11-27
    Description: In density-arrested monolayer cultures of Balb/c 3T3 cells, platelet-derived growth factor (PDGF) stimulates expression of the c-myc and c-fos proto-oncogenes, as well as the functionally uncharacterized genes, JE, KC, and JB. These genes are not coordinately regulated. Under ordinary conditions, c-fos, JE, KC, and JB respond to PDGF only when the cells are in a state of G0 growth arrest at the time of PDGF addition. The c-myc gene is regulated in opposition to the other genes, responding best to PDGF in cycling cultures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rollins, B J -- Morrison, E D -- Stiles, C D -- CA 20042-09/CA/NCI NIH HHS/ -- GM 31489-04/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 27;238(4831):1269-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Medicine, Dana-Farber Cancer Institute, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3685976" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle/drug effects ; Cell Division/drug effects ; Cells, Cultured ; Gene Expression Regulation/*drug effects ; Interphase ; Mice ; Mice, Inbred BALB C ; Platelet-Derived Growth Factor/*pharmacology ; Proto-Oncogenes/*drug effects ; Transcription, Genetic/*drug effects
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-12-18
    Description: The traditional view that quantal release of neurotransmitter results from the fusion of transmitter-containing vesicles with the neuronal membrane has been recently challenged. Although various alternative mechanisms have been proposed, a common element among them is the release of cytoplasmic transmitter, which, in one view, could occur through large conductance channels on the presynaptic membrane. Six nerve-muscle cell pairs were examined with a whole-cell patch clamp for the presence of such channels that are associated with the production of miniature end-plate potentials. Examination of the neuronal membrane current during the occurrence of 822 miniature end-plate potentials produced no evidence of large channels. Thus it is unlikely that quantal release is mediated by such channels in the neuromuscular junction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, S H -- Chow, I -- New York, N.Y. -- Science. 1987 Dec 18;238(4834):1712-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, UCLA School of Medicine 90024.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2891190" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/*physiology ; Cells, Cultured ; Membrane Potentials ; Motor Endplate/cytology/*physiology ; Neuromuscular Junction/*physiology ; Neurons/cytology/*physiology ; Neurotransmitter Agents/*secretion ; Xenopus
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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