CXCL9 and CXCL10 expression are critical for control of genital herpes simplex virus type 2 infection through mobilization of HSV-specific CTL and NK cells to the nervous system

The Journal of Immunology : Official Journal of the American Association of Immunologists
Manoj ThapaDaniel J J Carr

Abstract

CXCL9 and CXCL10 mediate the recruitment of T lymphocytes and NK cells known to be important in viral surveillance. The relevance of CXCL10 in comparison to CXCL9 in response to genital HSV-2 infection was determined using mice deficient in CXCL9 (CXCL9-/-) and deficient in CXCL10 (CXCL10-/-) along with wild-type (WT) C57BL/6 mice. An increased sensitivity to infection was found in CXCL10-/- mice in comparison to CXCL9-/- or WT mice as determined by detection of HSV-2 in the CNS at day 3 postinfection. However, by day 7 postinfection both CXCL9-/- and CXCL10-/- mice possessed significantly higher viral titers in the CNS in comparison to WT mice consistent with mortality (18-35%) of these mice within the first 7 days after infection. Even though CXCL9-/- and CXCL10-/- mice expressed elevated levels of CCL2, CCL3, CCL5, and CXCL1 in the spinal cord in comparison to WT mice, there was a reduction in NK cell and virus-specific CD8+ T cell mobilization to this tissue, suggesting CXCL9 and CXCL10 are critical for recruitment of these effector cells to the spinal cord following genital HSV-2 infection. Moreover, leukocytes from the spinal cord but not from draining lymph nodes or spleens of infected CXCL9-/- or CXCL10-/- mice displaye...Continue Reading

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Citations

Nov 20, 2008·The Journal of Immunology : Official Journal of the American Association of Immunologists·Todd R Wuest, Daniel J J Carr
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