The acute inflammatory process in murine lymphocytic choriomeningitis is dependent on Lyt-2+ immune T cells

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Abstract

Virus-immune spleen cells induce fatal immunopathology following adoptive transfer into adult C57B1/6J mice that have been infected with lymphocytic choriomeningitis virus (LCMV) and immunosuppressed with cyclophosphamide. This is accompanied by the development of potent cytotoxic T-lymphocyte (CTL) activity of donor origin in the recipient spleen. Both the capacity to trigger the acute meningitis observed at 72 hr and to generate CTL effectors in lymphoid tissue are completely abrogated by the removal of Lyt-2+ cells from the donor population. However a lower level of inflammatory process in the central nervous system may emerge, in the absence of significant CTL function in recipient spleen, by 5 days after transfer of the Lyt-2-depleted cell population. Treatment of the transferred cells with antibody to the L3T4 marker does not reduce either the severity of inflammation or the level of CTL effector function in the recipient. Thus Lyt-2+ cells are required for the acute, fatal immunopathology characteristic of LCM, but it is not clear that in a more chronic situation, they are the sole effectors capable of triggering inflammatory process in this disease.

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Supported in part by Grant AI19455 from the US National Institutes of Health.

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