Abstract
We have previously demonstrated that multiple sclerosis (MS) patients with KIR2DL2 expression on Natural killer (NK) cells are more susceptible to herpes simplex virus 1 (HSV-1) infection. We explored cytokine expression by NK cells during HSV-1 infection in association with KIR2DL2 expression. MS KIR2DL2+ NK cells failed to control HSV-1 infection and secreted high levels of Th17 cytokines, while MS KIR2DL2− NK cells released Th1 cytokines, mainly IFN-gamma. Our data showed, for the first time, a peculiar Th17 cytokine secretion by MS KIR2DL2+ NK cells in the presence of HSV-1 infection, that could be implicated in MS pathogenesis.
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