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Journal of Virology, March 1999, p. 2058-2063, Vol. 73, No. 3
Departments of
Pediatrics,1
Immunology,2
Medicine,
Received 25 August 1998/Accepted 2 December 1998
Herpes simplex virus (HSV) inhibits major histocompatibility
complex (MHC) class I expression in infected cells and does so much
more efficiently in human cells than in murine cells. Given this
difference, if MHC class I-restricted T cells do not play an important
role in protection of mice from HSV, an important role for these cells
in humans would be unlikely. However, the contribution of MHC class
I-restricted T cells to the control of HSV infection in mice remains
unclear. Further, the mechanisms by which these cells may act to
control infection, particularly in the nervous system, are not well
understood, though a role for gamma interferon (IFN-
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
An Important Role for Major Histocompatibility
Complex Class I-Restricted T Cells, and a Limited Role for Gamma
Interferon, in Protection of Mice against Lethal Herpes Simplex
Virus Infection

) has been
proposed. To address the roles of MHC class I and of IFN-
, C57BL/6
mice deficient in MHC class I expression (
2 microglobulin knockout
[
2KO] mice), in IFN-
expression (IFN-
KO mice), or in both
(IFN-
KO/
2KO mice) were infected with HSV by footpad inoculation.
2KO mice were markedly compromised in their ability to control
infection, as indicated by increased lethality and higher
concentrations of virus in the feet and spinal ganglia. In contrast,
IFN-
appeared to play at most a limited role in viral clearance. The
results suggest that MHC class I-restricted T cells play an important role in protection of mice against neuroinvasive HSV infection and do
so largely by mechanisms other than the production of IFN-
.
*
Corresponding author. Mailing address: Pediatrics, Box
356320, University of Washington School of Medicine, 1959 NE Pacific St., Seattle, WA 98195. Phone: (206) 543-3207. Fax: (206) 543-3184. E-mail: cbwilson{at}u.washington.edu.
Present address: University of Illinois School of Medicine,
Chicago, Ill.
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