Journal of Virology, January 2001, p. 569-578, Vol. 75, No. 2
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.2.569-578.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Department of Microbiology, University of Tennessee, Knoxville, Tennessee 37996
Received 24 July 2000/Accepted 20 October 2000
In this study, we examined the effects of murine chemokine DNA, as
genetic adjuvants given mucosally, on the systemic and distal mucosal
immune responses to plasmid DNA encoding gB of herpes simplex virus
(HSV) by using the mouse model. The CC chemokines macrophage
inflammatory protein 1
(MIP-1
) and monocyte chemotactic protein 1 (MCP-1) biased the immunity to the Th2-type pattern as judged by the
ratio of immunoglobulin isotypes and interleukin-4 cytokine levels produced by CD4+ T cells. The CXC chemokine
MIP-2 and the CC chemokine MIP-1
, however, mounted immune
responses of the Th1-type pattern, and such a response rendered
recipients more resistant to HSV vaginal infection. In addition,
MIP-1
appeared to act via the upregulation of
antigen-presenting cell (APC) function and the expression of costimulatory molecules (B7-1 and B7-2), whereas MIP-2
enhanced Th1-type CD4+ T-cell-mediated adaptive immunity by
increasing gamma interferon secretion from activated NK
cells. Our results emphasize the value of using the mucosal route
to administer DNA modulators such as chemokines that
function as adjuvants by regulating the activity of innate
immunity. Our findings provide new insight into the value of
CXC and CC chemokines, which act on different innate cellular
components as the linkage signals between innate and adaptive immunity
in mucosal DNA vaccination.
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