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  • Cell Line  (5)
  • *Gene Expression Regulation  (2)
  • *International Cooperation  (2)
  • 1
    Publication Date: 1999-07-31
    Description: The generation of cell-mediated immunity against many infectious pathogens involves the production of interleukin-12 (IL-12), a key signal of the innate immune system. Yet, for many pathogens, the molecules that induce IL-12 production by macrophages and the mechanisms by which they do so remain undefined. Here it is shown that microbial lipoproteins are potent stimulators of IL-12 production by human macrophages, and that induction is mediated by Toll-like receptors (TLRs). Several lipoproteins stimulated TLR-dependent transcription of inducible nitric oxide synthase and the production of nitric oxide, a powerful microbicidal pathway. Activation of TLRs by microbial lipoproteins may initiate innate defense mechanisms against infectious pathogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brightbill, H D -- Libraty, D H -- Krutzik, S R -- Yang, R B -- Belisle, J T -- Bleharski, J R -- Maitland, M -- Norgard, M V -- Plevy, S E -- Smale, S T -- Brennan, P J -- Bloom, B R -- Godowski, P J -- Modlin, R L -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):732-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Howard Hughes Medical Institute, University of California Los Angeles School of Medicine, Los Anges, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426995" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Bacterial/chemistry/*immunology/metabolism ; Cell Line ; *Drosophila Proteins ; Gene Expression Regulation ; Humans ; Interleukin-12/*biosynthesis/genetics ; Lipopolysaccharides/immunology ; Lipoproteins/chemistry/*immunology/metabolism ; Macrophages/*immunology/metabolism ; Membrane Glycoproteins/*metabolism ; Mice ; Monocytes/*immunology/metabolism ; Mycobacterium tuberculosis/*immunology ; NF-kappa B/biosynthesis ; Nitric Oxide Synthase/genetics ; Nitric Oxide Synthase Type II ; Promoter Regions, Genetic ; Receptors, Cell Surface/*metabolism ; Signal Transduction ; Toll-Like Receptors ; Transcription, Genetic ; Transfection ; Tumor Cells, Cultured
    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: 2001-02-27
    Description: The mammalian innate immune system retains from Drosophila a family of homologous Toll-like receptors (TLRs) that mediate responses to microbial ligands. Here, we show that TLR2 activation leads to killing of intracellular Mycobacterium tuberculosis in both mouse and human macrophages, through distinct mechanisms. In mouse macrophages, bacterial lipoprotein activation of TLR2 leads to a nitric oxide-dependent killing of intracellular tubercle bacilli, but in human monocytes and alveolar macrophages, this pathway was nitric oxide-independent. Thus, mammalian TLRs respond (as Drosophila Toll receptors do) to microbial ligands and also have the ability to activate antimicrobial effector pathways at the site of infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thoma-Uszynski, S -- Stenger, S -- Takeuchi, O -- Ochoa, M T -- Engele, M -- Sieling, P A -- Barnes, P F -- Rollinghoff, M -- Bolcskei, P L -- Wagner, M -- Akira, S -- Norgard, M V -- Belisle, J T -- Godowski, P J -- Bloom, B R -- Modlin, R L -- AI 07118/AI/NIAID NIH HHS/ -- AI 22553/AI/NIAID NIH HHS/ -- AI 47868/AI/NIAID NIH HHS/ -- AR 40312/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Feb 23;291(5508):1544-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Dermatology, Department of Microbiology and Immunology and Molecular Biology Institute, UCLA School of Medicine, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11222859" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Proteins/immunology ; Cell Line ; Cells, Cultured ; *Drosophila Proteins ; Humans ; Interferon-gamma/immunology/pharmacology ; Ligands ; Lipoproteins/*immunology ; Macrophage Activation ; Macrophages/immunology/metabolism/*microbiology ; Macrophages, Alveolar/immunology/metabolism/microbiology ; Macrophages, Peritoneal/immunology/metabolism/microbiology ; Membrane Glycoproteins/*metabolism ; Mice ; Monocytes/immunology/metabolism/*microbiology ; Mycobacterium tuberculosis/growth & development/*immunology ; Nitric Oxide/*metabolism ; Nitric Oxide Synthase/antagonists & inhibitors/metabolism ; Nitric Oxide Synthase Type II ; Receptors, Cell Surface/*metabolism ; Signal Transduction ; Toll-Like Receptor 2 ; Toll-Like Receptors ; Tumor Necrosis Factor-alpha/immunology/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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  • 3
    Publication Date: 2001-10-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Modlin, R L -- Bloom, B R -- New York, N.Y. -- Science. 2001 Oct 26;294(5543):799-801.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Dermatology and Department of Microbiology and Immunology, UCLA School of Medicine, Los Angeles, CA 90095, USA. rmodlin@mednet.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11679655" target="_blank"〉PubMed〈/a〉
    Keywords: Candida albicans/immunology ; Cells, Cultured ; Dendritic Cells/*immunology/*metabolism ; Escherichia coli/immunology ; *Gene Expression Profiling ; *Gene Expression Regulation ; Genomics ; Humans ; Immunity, Innate ; Influenza A virus/immunology ; Ligands ; Lipopolysaccharides/immunology ; Mannans/immunology ; Oligonucleotide Array Sequence Analysis ; RNA, Double-Stranded/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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  • 4
    Publication Date: 1998-10-02
    Description: Cytolytic T lymphocytes (CTLs) kill intracellular pathogens by a granule-dependent mechanism. Granulysin, a protein found in granules of CTLs, reduced the viability of a broad spectrum of pathogenic bacteria, fungi, and parasites in vitro. Granulysin directly killed extracellular Mycobacterium tuberculosis, altering the membrane integrity of the bacillus, and, in combination with perforin, decreased the viability of intracellular M. tuberculosis. The ability of CTLs to kill intracellular M. tuberculosis was dependent on the presence of granulysin in cytotoxic granules, defining a mechanism by which T cells directly contribute to immunity against intracellular pathogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stenger, S -- Hanson, D A -- Teitelbaum, R -- Dewan, P -- Niazi, K R -- Froelich, C J -- Ganz, T -- Thoma-Uszynski, S -- Melian, A -- Bogdan, C -- Porcelli, S A -- Bloom, B R -- Krensky, A M -- Modlin, R L -- New York, N.Y. -- Science. 1998 Oct 2;282(5386):121-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, UCLA School of Medicine, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9756476" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Differentiation, T-Lymphocyte/analysis/*immunology/pharmacology ; Cell Line ; Cell Membrane/ultrastructure ; Cells, Cultured ; Cytoplasmic Granules/immunology ; *Cytotoxicity, Immunologic ; Humans ; Macrophages/immunology/microbiology ; Membrane Glycoproteins/immunology/pharmacology ; Microscopy, Confocal ; Microscopy, Electron, Scanning ; Mycobacterium tuberculosis/*immunology/physiology/ultrastructure ; Perforin ; Pore Forming Cytotoxic Proteins ; Recombinant Proteins/pharmacology ; T-Lymphocytes, Cytotoxic/*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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  • 5
    Publication Date: 1997-06-13
    Description: In analyzing mechanisms of protection against intracellular infections, a series of human CD1-restricted T cell lines of two distinct phenotypes were derived. Both CD4(-)CD8(-) (double-negative) T cells and CD8(+) T cells efficiently lysed macrophages infected with Mycobacterium tuberculosis. The cytotoxicity of CD4(-)CD8(-) T cells was mediated by Fas-FasL interaction and had no effect on the viability of the mycobacteria. The CD8(+) T cells lysed infected macrophages by a Fas-independent, granule-dependent mechanism that resulted in killing of bacteria. These data indicate that two phenotypically distinct subsets of human cytolytic T lymphocytes use different mechanisms to kill infected cells and contribute in different ways to host defense against intracellular infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stenger, S -- Mazzaccaro, R J -- Uyemura, K -- Cho, S -- Barnes, P F -- Rosat, J P -- Sette, A -- Brenner, M B -- Porcelli, S A -- Bloom, B R -- Modlin, R L -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1684-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California Los Angeles School of Medicine, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180075" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, CD1/*immunology ; Antigens, CD95/immunology/metabolism ; Cell Line ; Coculture Techniques ; Colony Count, Microbial ; Cytoplasmic Granules/immunology ; *Cytotoxicity, Immunologic ; Fas Ligand Protein ; Granzymes ; Humans ; Lymphocyte Activation ; Macrophages/*immunology/microbiology ; Membrane Glycoproteins/genetics/immunology/metabolism ; Mycobacterium tuberculosis/growth & development/*immunology ; Perforin ; Phenotype ; Pore Forming Cytotoxic Proteins ; Serine Endopeptidases/metabolism ; Strontium/pharmacology ; T-Lymphocyte Subsets/*immunology ; T-Lymphocytes, Cytotoxic/*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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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2003-05-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bloom, Barry R -- New York, N.Y. -- Science. 2003 May 2;300(5620):701.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12730561" target="_blank"〉PubMed〈/a〉
    Keywords: Centers for Disease Control and Prevention (U.S.) ; Communicable Diseases, Emerging/epidemiology ; *Disease Outbreaks ; Federal Government ; Financial Support ; Financing, Government ; *Global Health ; *Health Policy ; Humans ; *International Cooperation ; Legislation as Topic ; National Institutes of Health (U.S.) ; Research Support as Topic ; Severe Acute Respiratory Syndrome/*epidemiology ; United States ; World Health Organization
    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
    Publication Date: 2003-09-13
    Description: Leprosy presents as a clinical and immunological spectrum of disease. With the use of gene expression profiling, we observed that a distinction in gene expression correlates with and accurately classifies the clinical form of the disease. Genes belonging to the leukocyte immunoglobulin-like receptor (LIR) family were significantly up-regulated in lesions of lepromatous patients suffering from the disseminated form of the infection. In functional studies, LIR-7 suppressed innate host defense mechanisms by shifting monocyte production from interleukin-12 toward interleukin-10 and by blocking antimicrobial activity triggered by Toll-like receptors. Gene expression profiles may be useful in defining clinical forms of disease and providing insights into the regulation of immune responses to pathogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bleharski, Joshua R -- Li, Huiying -- Meinken, Christoph -- Graeber, Thomas G -- Ochoa, Maria-Teresa -- Yamamura, Masahiro -- Burdick, Anne -- Sarno, Euzenir N -- Wagner, Manfred -- Rollinghoff, Martin -- Rea, Thomas H -- Colonna, Marco -- Stenger, Steffen -- Bloom, Barry R -- Eisenberg, David -- Modlin, Robert L -- AI 07118/AI/NIAID NIH HHS/ -- AI 22553/AI/NIAID NIH HHS/ -- AI 47868/AI/NIAID NIH HHS/ -- AR 40312/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Sep 12;301(5639):1527-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12970564" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Cluster Analysis ; Colony Count, Microbial ; Cytokines/genetics/metabolism ; *Gene Expression Profiling ; *Gene Expression Regulation ; Genes, Immunoglobulin ; Humans ; Immunity, Cellular ; Immunity, Innate ; Leprosy, Lepromatous/*classification/*genetics/immunology/physiopathology ; Leprosy, Tuberculoid/*classification/*genetics/immunology/physiopathology ; Macrophages, Alveolar/microbiology ; Membrane Glycoproteins/immunology ; Mycobacterium tuberculosis/growth & development/immunology ; Oligonucleotide Array Sequence Analysis ; Polymerase Chain Reaction ; Principal Component Analysis ; Receptors, Cell Surface/immunology ; Receptors, Immunologic/genetics/metabolism ; Toll-Like Receptors ; Up-Regulation
    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
    Publication Date: 1995-07-14
    Description: It has long been the paradigm that T cells recognize peptide antigens presented by major histocompatibility complex (MHC) molecules. However, nonpeptide antigens can be presented to T cells by human CD1b molecules, which are not encoded by the MHC. A major class of microbial antigens associated with pathogenicity are lipoglycans. It is shown here that human CD1b presents the defined mycobacterial lipoglycan lipoarabinomannan (LAM) to alpha beta T cell receptor-bearing lymphocytes. Presentation of these lipoglycan antigens required internalization and endosomal acidification. The T cell recognition required mannosides with alpha(1--〉2) linkages and a phosphotidylinositol unit. T cells activated by LAM produced interferon gamma and were cytolytic. Thus, an important class of microbial molecules, the lipoglycans, is a part of the universe of foreign antigens recognized by human T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sieling, P A -- Chatterjee, D -- Porcelli, S A -- Prigozy, T I -- Mazzaccaro, R J -- Soriano, T -- Bloom, B R -- Brenner, M B -- Kronenberg, M -- Brennan, P J -- AI 07118/AI/NIAID NIH HHS/ -- AI 18357/AI/NIAID NIH HHS/ -- AI 28973/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1995 Jul 14;269(5221):227-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Dermatology, University of California at Los Angeles (UCLA) School of Medicine 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7542404" target="_blank"〉PubMed〈/a〉
    Keywords: *Antigen Presentation ; Antigen-Presenting Cells/immunology ; Antigens, CD/*immunology ; Antigens, CD1 ; Carbohydrate Conformation ; Carbohydrate Sequence ; Cell Line ; Humans ; Interferon-gamma/secretion ; Interleukin-4/secretion ; Leprosy/*immunology ; Lipopolysaccharides/*immunology ; Lymphocyte Activation ; Molecular Sequence Data ; Mycobacterium leprae/immunology ; Phosphatidylinositols/immunology ; Receptors, Antigen, T-Cell, alpha-beta/immunology ; Species Specificity ; T-Lymphocytes, Cytotoxic/*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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2010-05-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bloom, Barry R -- New York, N.Y. -- Science. 2010 May 14;328(5980):791. doi: 10.1126/science.1189538.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20466888" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome ; Budgets ; *Financing, Government ; *Global Health ; Humans ; International Agencies/*economics ; *International Cooperation ; Malaria ; Tuberculosis ; United States
    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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