Abstract
West Nile (WN) virus causes fatal meningoencephalitis in laboratory mice, thereby partially mimicking human disease. Using this model, we have demonstrated that mice deficient in gammadelta T cells are more susceptible to WN virus infection. TCRdelta(-/-) mice have elevated viral loads and greater dissemination of the pathogen to the CNS. In wild-type mice, gammadelta T cells expanded significantly during WN virus infection, produced IFN-gamma in ex vivo assays, and enhanced perforin expression by splenic T cells. Adoptive transfer of gammadelta T cells to TCRdelta(-/-) mice reduced the susceptibility of these mice to WN virus, and this effect was primarily due to IFN-gamma-producing gammadelta T cells. These data demonstrate a distinct role for gammadelta T cells in the control of and prevention of mortality from murine WN virus infection.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Adoptive Transfer
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Animals
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Blood / immunology
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Blood / virology
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Cell Division / genetics
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Cell Division / immunology
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Cells, Cultured
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Cytotoxicity, Immunologic / genetics
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Encephalitis, Viral / genetics
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Encephalitis, Viral / immunology
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Encephalitis, Viral / prevention & control
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Encephalitis, Viral / virology
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Female
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Genes, T-Cell Receptor beta / genetics
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Genes, T-Cell Receptor delta / genetics
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Genetic Predisposition to Disease
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Interferon-gamma / biosynthesis*
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Interferon-gamma / physiology
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Lymphoid Tissue / immunology
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Lymphoid Tissue / virology
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Mice
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Mice, Inbred C57BL
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Mice, Knockout
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Receptors, Antigen, T-Cell, alpha-beta / deficiency
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Receptors, Antigen, T-Cell, alpha-beta / genetics
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Receptors, Antigen, T-Cell, gamma-delta / deficiency
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Receptors, Antigen, T-Cell, gamma-delta / genetics
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Receptors, Antigen, T-Cell, gamma-delta / physiology*
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Severity of Illness Index
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T-Lymphocyte Subsets / immunology*
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T-Lymphocyte Subsets / metabolism*
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T-Lymphocyte Subsets / pathology
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T-Lymphocyte Subsets / transplantation
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Viral Load
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West Nile Fever / genetics
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West Nile Fever / immunology
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West Nile Fever / prevention & control*
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West Nile Fever / virology
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West Nile virus / immunology*
Substances
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Receptors, Antigen, T-Cell, alpha-beta
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Receptors, Antigen, T-Cell, gamma-delta
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Interferon-gamma