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  • Mice  (192)
  • Protein Conformation  (55)
  • American Association for the Advancement of Science (AAAS)  (243)
  • American Geophysical Union
  • Cambridge University Press
  • Institute of Physics
  • 2015-2019  (71)
  • 1995-1999
  • 1990-1994  (172)
  • 1970-1974
  • 2016  (71)
  • 1992  (172)
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  • 2015-2019  (71)
  • 1995-1999
  • 1990-1994  (172)
  • 1970-1974
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  • 1
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    Increased osteoclast development after estrogen loss: mediation by interleukin-6 (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-03
    Description: Osteoclasts, the cells that resorb bone, develop from hematopoietic precursors of the bone marrow under the control of factors produced in their microenvironment. The cytokine interleukin-6 can promote hematopoiesis and osteoclastogenesis. Interleukin-6 production by bone and marrow stromal cells is suppressed by 17 beta-estradiol in vitro. In mice, estrogen loss (ovariectomy) increased the number of colony-forming units for granulocytes and macrophages, enhanced osteoclast development in ex vivo cultures of marrow, and increased the number of osteoclasts in trabecular bone. These changes were prevented by 17 beta-estradiol or an antibody to interleukin-6. Thus, estrogen loss results in an interleukin-6-mediated stimulation of osteoclastogenesis, which suggests a mechanism for the increased bone resorption in postmenopausal osteoporosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jilka, R L -- Hangoc, G -- Girasole, G -- Passeri, G -- Williams, D C -- Abrams, J S -- Boyce, B -- Broxmeyer, H -- Manolagas, S C -- AI21761/AI/NIAID NIH HHS/ -- AR41313/AR/NIAMS NIH HHS/ -- CA36464/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1992 Jul 3;257(5066):88-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Veterans Affairs Medical Center, Indiana University School of Medicine, Indianapolis 46202.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1621100" target="_blank"〉PubMed〈/a〉
    Keywords: Analysis of Variance ; Animals ; Antibodies, Monoclonal ; Bone Marrow Cells ; Cells, Cultured ; Estradiol/*pharmacology ; Female ; Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology ; Immunoglobulin G ; Interleukin-6/immunology/*physiology ; Mice ; Osteoclasts/*cytology/drug effects ; *Ovariectomy ; Recombinant Proteins/pharmacology ; Spleen/cytology ; Stem Cells/cytology/drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Exaggerated carcinogenicity of chemicals (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-06-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abelson, P H -- New York, N.Y. -- Science. 1992 Jun 19;256(5064):1609.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1609271" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Butadienes/*toxicity ; *Carcinogenicity Tests ; Haplorhini ; Humans ; Mice ; Neoplasms/*chemically induced ; Rats ; Risk
    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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  • 3
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    Repression of the insulin-like growth factor II gene by the Wilms tumor suppressor WT1 (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-31
    Description: The Wilms tumor suppressor gene wt1 encodes a zinc finger DNA binding protein, WT1, that functions as a transcriptional repressor. The fetal mitogen insulin-like growth factor II (IGF-II) is overexpressed in Wilms tumors and may have autocrine effects in tumor progression. The major fetal IGF-II promoter was defined in transient transfection assays as a region spanning from nucleotides -295 to +135, relative to the transcription start site. WT1 bound to multiple sites in this region and functioned as a potent repressor of IGF-II transcription in vivo. Maximal repression was dependent on the presence of WT1 binding sites on each side of the transcriptional initiation site. These findings provide a molecular basis for overexpression of IGF-II in Wilms tumors and suggest that WT1 negatively regulates blastemal cell proliferation by limiting the production of a fetal growth factor in the developing vertebrate kidney.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Drummond, I A -- Madden, S L -- Rohwer-Nutter, P -- Bell, G I -- Sukhatme, V P -- Rauscher, F J 3rd -- CA 10817/CA/NCI NIH HHS/ -- CA 47983/CA/NCI NIH HHS/ -- CA 52009/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1992 Jul 31;257(5070):674-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1323141" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites ; Blotting, Northern ; DNA/chemistry/metabolism ; DNA-Binding Proteins/*metabolism ; Deoxyribonuclease I/metabolism ; *Gene Expression Regulation, Neoplastic ; Genes, Wilms Tumor/*physiology ; Humans ; Insulin-Like Growth Factor II/*genetics ; Kidney/embryology/metabolism ; Mice ; Molecular Sequence Data ; Promoter Regions, Genetic ; Rats ; Sequence Homology, Nucleic Acid ; Transfection ; WT1 Proteins ; Wilms Tumor/genetics/metabolism ; Zinc Fingers
    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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  • 4
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    Enhanced degradation of the ferritin repressor protein during induction of ferritin messenger RNA translation (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-05-01
    Description: Induction of ferritin synthesis in cultured cells by heme or iron is accompanied by degradation of the ferritin repressor protein (FRP). Intermediates in the degradative pathway apparently include FRP covalently linked in larger aggregates. The effect of iron on FRP degradation is enhanced by porphyrin precursors but is decreased by inhibitors of porphyrin synthesis, which implies that heme is an active agent. These results suggest that translational induction in this system may be caused by enhanced repressor degradation. While unique among translational regulatory systems, this process is common to a variety of other biosynthetic control mechanisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goessling, L S -- Daniels-McQueen, S -- Bhattacharyya-Pakrasi, M -- Lin, J J -- Thach, R E -- AI 20484/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1992 May 1;256(5057):670-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Washington University, St. Louis, MO 63130.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1316633" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Aminolevulinate Synthetase/genetics ; Aminolevulinic Acid/pharmacology ; Animals ; Cell Line ; Cell Line, Transformed ; Ferritins/biosynthesis/*genetics ; Fibroblasts/metabolism ; Iron/pharmacology ; Iron Regulatory Protein 1 ; Iron-Regulatory Proteins ; Mice ; Papillomaviridae ; Porphobilinogen/pharmacology ; *Protein Biosynthesis ; RNA, Messenger/*genetics ; RNA-Binding Proteins/*metabolism ; Rabbits
    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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  • 5
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    Activation of mitogen-activated protein kinase kinase by v-Raf in NIH 3T3 cells and in vitro (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-09-04
    Description: Mitogen-activated protein (MAP) kinases are 42- and 44-kD serine-threonine protein kinases that are activated by tyrosine and threonine phosphorylation in cells stimulated with mitogens and growth factors. MAP kinase and the protein kinase that activates it (MAP kinase kinase) were constitutively activated in NIH 3T3 cells infected with viruses containing either of two oncogenic forms (p35EC12, p3722W) of the c-Raf-1 protein kinase. The v-Raf proteins purified from cells infected with EC12 or 22W viruses activated MAP kinase kinase from skeletal muscle in vitro. Furthermore, a bacterially expressed v-Raf fusion protein (glutathione S-transferase-p3722W) also activated MAP kinase kinase in vitro. These findings suggest that one function of c-Raf-1 in mitogenic signaling is to phosphorylate and activate MAP kinase kinase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dent, P -- Haser, W -- Haystead, T A -- Vincent, L A -- Roberts, T M -- Sturgill, T W -- CA50661/CA/NCI NIH HHS/ -- DK41077/DK/NIDDK NIH HHS/ -- HD24926/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1992 Sep 4;257(5075):1404-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, University of Virginia, Charlottesville 22908.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1326789" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Cell Line ; Cell Line, Transformed ; Enzyme Activation/drug effects ; Immunosorbent Techniques ; Mice ; Mitogen-Activated Protein Kinase Kinases ; Muscles/enzymology ; Oncogene Proteins v-raf ; Phosphorylation ; Protein Kinases/*metabolism ; Proto-Oncogene Proteins/pharmacology ; Proto-Oncogene Proteins c-raf ; Recombinant Fusion Proteins/pharmacology ; Retroviridae Proteins, Oncogenic/genetics/*pharmacology
    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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  • 6
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    Role of CD8+ T cells in murine experimental allergic encephalomyelitis (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-05-22
    Description: The course of experimental allergic encephalomyelitis (EAE), an animal model for multiple sclerosis, is affected by immunoregulatory T lymphocytes. When animals are immunized with encephalitogenic peptide of myelin basic protein and recover from the first episode of EAE, they become resistant to a second induction of this disease. Animals depleted of CD8+ T cells by antibody-mediated clearance were used to examine the role of CD8+ T cells in EAE. These cells were found to be major participants in the resistance to a second induction of EAE but were not essential for spontaneous recovery from the first episode of the disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, H -- Zhang, S I -- Pernis, B -- New York, N.Y. -- Science. 1992 May 22;256(5060):1213-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1375398" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology ; Antigens, CD4/immunology ; Antigens, CD8/*immunology ; Encephalomyelitis, Autoimmune, Experimental/*immunology/physiopathology/therapy ; Immunization ; Lymphocyte Depletion ; Mice ; Mice, Inbred Strains ; Myelin Basic Protein/immunology ; T-Lymphocyte Subsets/*immunology
    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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  • 7
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    Homobatrachotoxin in the genus Pitohui: chemical defense in birds? (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-10-30
    Description: Three passerine species in the genus Pitohui, endemic to the New Guinea subregion, contain the steroidal alkaloid homobatrachotoxin, apparently as a chemical defense. Toxin concentrations varied among species but were always highest in the skin and feathers. Homobatrachotoxin is a member of a class of compounds collectively called batrachotoxins that were previously considered to be restricted to neotropical poison-dart frogs of the genus Phyllobates. The occurrence of homobatrachotoxin in pitohuis suggests that birds and frogs independently evolved this class of alkaloids.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dumbacher, J P -- Beehler, B M -- Spande, T F -- Garraffo, H M -- Daly, J W -- New York, N.Y. -- Science. 1992 Oct 30;258(5083):799-801.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolution, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1439786" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura ; Batrachotoxins/*analysis ; Biological Assay ; Biological Evolution ; *Birds ; Chromatography, Thin Layer ; Feathers/*chemistry ; Gas Chromatography-Mass Spectrometry ; Mass Spectrometry ; Mice ; Muscles/*chemistry ; Skin/*chemistry
    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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  • 8
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    Establishment of stable, cell-mediated immunity that makes "susceptible" mice resistant to Leishmania major (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-24
    Description: Cell-mediated, but not antibody-mediated, immune responses protect humans against certain pathogens that produce chronic diseases such as leishmaniasis. Effective vaccination against such pathogens must therefore produce an immunological "imprint" so that stable, cell-mediated immunity is induced in all individuals after natural infection. BALB/c mice "innately susceptible" to Leishmania major produce antibodies after substantial infection. In the present study, "susceptible" mice injected with a small number of parasites mounted a cell-mediated response and acquired resistance to a larger, normally pathogenic, challenge. This vaccination strategy may be applicable in diseases in which protection is dependent on cell-mediated immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bretscher, P A -- Wei, G -- Menon, J N -- Bielefeldt-Ohmann, H -- New York, N.Y. -- Science. 1992 Jul 24;257(5069):539-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Saskatchewan, Saskatoon, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1636090" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Protozoan/analysis ; Disease Susceptibility ; *Immunity, Cellular ; Immunity, Innate ; Immunoglobulin G/analysis/classification ; Leishmaniasis, Cutaneous/*immunology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred CBA ; T-Lymphocytes/immunology
    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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  • 9
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    Three-dimensional structure of dimeric human recombinant macrophage colony-stimulating factor (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-11-20
    Description: Macrophage colony-stimulating factor (M-CSF) triggers the development of cells of the monocyte-macrophage lineage and has a variety of stimulatory effects on mature cells of this class. The biologically active form of M-CSF is a disulfide-linked dimer that activates an intrinsic tyrosine kinase activity on the M-CSF receptor by inducing dimerization of the receptor molecules. The structure of a recombinant human M-CSF dimer, determined at 2.5 angstroms by x-ray crystallography, contains two bundles of four alpha helices laid end-to-end, with an interchain disulfide bond. Individual monomers of M-CSF show a close structural similarity to the cytokines granulocyte-macrophage colony-stimulating factor and human growth hormone. Both of these cytokines are monomeric in their active form, and their specific receptors lack intrinsic tyrosine kinase activity. The similarity of these structures suggests that the receptor binding determinants for all three cytokines may be similar.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pandit, J -- Bohm, A -- Jancarik, J -- Halenbeck, R -- Koths, K -- Kim, S H -- New York, N.Y. -- Science. 1992 Nov 20;258(5086):1358-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Biology Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1455231" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallography ; Disulfides ; Granulocyte-Macrophage Colony-Stimulating Factor/ultrastructure ; Growth Hormone/chemistry ; Macrophage Colony-Stimulating Factor/*ultrastructure ; Models, Molecular ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Recombinant Proteins/ultrastructure ; Sequence Homology, Amino Acid ; X-Ray Diffraction
    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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  • 10
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    Expression of intra-MHC transporter (Ham) genes and class I antigens in diabetes-susceptible NOD mice (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wicker, L S -- Podolin, P L -- Fischer, P -- Sirotina, A -- Boltz, R C Jr -- Peterson, L B -- New York, N.Y. -- Science. 1992 Jun 26;256(5065):1828-30; author reply 1830-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1319611" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD27 ; Antigens, Differentiation, T-Lymphocyte/*biosynthesis ; B-Lymphocytes/immunology ; Blotting, Northern ; Diabetes Mellitus, Type 1/*immunology ; Disease Models, Animal ; Flow Cytometry ; H-2 Antigens/*biosynthesis ; Mice ; Mice, Inbred BALB C ; Mice, Inbred NOD ; T-Lymphocytes/immunology
    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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