1887

Abstract

Sin Nombre virus (SNV) causes hantavirus pulmonary syndrome (HPS), with a high rate of mortality in humans who are infected by the transmission of virus from the natural rodent host. In humans, cytotoxic T lymphocytes (CTL) specific for SNV appear to play an important role in the pathogenicity of HPS. There is a correlation between the frequencies of SNV-specific CTLs and the severity of HPS disease. In order to create a mouse model to study the role of SNV-specific T cells , T cell responses to SNV nucleocapsid (N) protein in B6.PL /Cy mice (H-2) immunized with plasmid DNA or recombinant vaccinia virus expressing SNV N protein were examined. Four peptides, NC94–101, NC175–189, NC217–231 and NC331–345, were recognized by CD8 T cells in CTL and ELISPOT assays in SNV N-immunized mice. Interestingly, two of these epitopes are located in the central region of the SNV N protein, where several human CD8 T-cell epitopes have been defined in Puumala virus and SNV. CTL lines specific for these four epitopes were cross-reactive to corresponding Puumala virus peptides, but only one of them was cross-reactive to Hantaan virus peptides. These results will enable the analysis of the roles of CTL in immunopathology of HPS in experimental mouse models of HPS.

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2004-07-01
2020-10-29
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