Abstract
C57Bl/6 mice and mice deficient in the CD40 molecule were infected with three strains of Mycobacterium avium. Two of the M. avium strains proliferated more extensively in CD40-deficient (CD40-/-) mice than in control mice. The increased susceptibility to infection of CD40-/- mice was associated with the generation of poorer interleukin-12 (IL-12) p40 and interferon-gamma (IFN-gamma) responses as compared to the controls, suggesting a role for CD40 in the development of protective immunity. In contrast, direct triggering of CD40 on infected macrophages failed to induce any anti-mycobacterial activity in infected macrophages.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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CD40 Antigens / immunology*
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CD40 Ligand / immunology
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Cells, Cultured
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Enzyme-Linked Immunosorbent Assay
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Immunity / immunology*
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Immunity, Cellular / immunology
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Interferon-gamma / immunology
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Interleukin-12 / immunology
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Interleukin-12 Subunit p40
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Macrophages / immunology
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Mice
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Mice, Inbred C57BL
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Mycobacterium avium*
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Protein Subunits / immunology
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Reverse Transcriptase Polymerase Chain Reaction
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Spleen / cytology
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Spleen / immunology
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Tuberculosis / immunology*
Substances
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CD40 Antigens
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Interleukin-12 Subunit p40
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Protein Subunits
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CD40 Ligand
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Interleukin-12
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Interferon-gamma