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  • 1
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    Involvement of the IRF-1 transcription factor in antiviral responses to interferons (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-06-24
    Description: The mechanisms underlying interferon (IFN)-induced antiviral states are not well understood. Interferon regulatory factor-1 (IRF-1) is an IFN-inducible transcriptional activator, whereas IRF-2 suppresses IRF-1 action. The inhibition of encephalomyocarditis virus (EMCV) replication by IFN-alpha and especially by IFN-gamma was impaired in cells from mice with a null mutation in the IRF-1 gene (IRF-1-/- mice). The IRF-1-/- mice were less resistant than normal mice to EMCV infection, as revealed by accelerated mortality and a larger virus titer in target organs. The absence of IRF-1 did not clearly affect replication of two other types of viruses. Thus, IRF-1 is necessary for the antiviral action of IFNs against some viruses, but IFNs activate multiple activation pathways through diverse target genes to induce the antiviral state.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kimura, T -- Nakayama, K -- Penninger, J -- Kitagawa, M -- Harada, H -- Matsuyama, T -- Tanaka, N -- Kamijo, R -- Vilcek, J -- Mak, T W -- R35CA49731/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Jun 24;264(5167):1921-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Molecular and Cellular Biology, Osaka University, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8009222" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cardiovirus Infections/*immunology/microbiology ; Cells, Cultured ; DNA-Binding Proteins/genetics/*physiology ; Encephalomyocarditis virus/physiology ; Gene Expression Regulation ; Interferon Regulatory Factor-1 ; Interferon-alpha/*pharmacology ; Interferon-gamma/*pharmacology ; Mice ; Mutation ; Phosphoproteins/genetics/*physiology ; Simplexvirus/physiology ; Transcription Factors/genetics/*physiology ; Vesicular stomatitis Indiana virus/physiology ; *Virus Replication
    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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    Requirement for transcription factor IRF-1 in NO synthase induction in macrophages (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-03-18
    Description: Production of nitric oxide (NO) by macrophages is important for the killing of intracellular infectious agents. Interferon (IFN)-gamma and lipopolysaccharide stimulate NO production by transcriptionally up-regulating the inducible NO synthase (iNOS). Macrophages from mice with a targeted disruption of the IFN regulatory factor-1 (IRF-1) gene (IRF-1-/- mice) produced little or no NO and synthesized barely detectable iNOS messenger RNA in response to stimulation. Two adjacent IRF-1 response elements were identified in the iNOS promoter. Infection with Mycobacterium bovis (BCG) was more severe in IRF-1-/- mice than in wild-type mice. Thus, IRF-1 is essential for iNOS activation in murine macrophages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kamijo, R -- Harada, H -- Matsuyama, T -- Bosland, M -- Gerecitano, J -- Shapiro, D -- Le, J -- Koh, S I -- Kimura, T -- Green, S J -- A128993/PHS HHS/ -- P30CA13343/CA/NCI NIH HHS/ -- R35CA49731/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Mar 18;263(5153):1612-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, New York University Medical Center, NY 10016.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7510419" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Oxidoreductases/*biosynthesis/genetics ; Animals ; Base Sequence ; DNA-Binding Proteins/genetics/*metabolism ; Enzyme Induction ; Interferon Regulatory Factor-1 ; Interferons/pharmacology ; Lipopolysaccharides/pharmacology ; Macrophage Activation ; Macrophages, Peritoneal/*enzymology ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Molecular Sequence Data ; Mutation ; Mycobacterium bovis ; Nitric Oxide/metabolism ; Nitric Oxide Synthase ; Phosphoproteins/genetics/*metabolism ; Promoter Regions, Genetic ; RNA, Messenger/genetics/metabolism ; Regulatory Sequences, Nucleic Acid ; Transcription Factors/genetics/*metabolism ; Tuberculosis/immunology ; Tumor Necrosis Factor-alpha/pharmacology
    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)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
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