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J Virol, June 1998, p. 5076-5084, Vol. 72, No. 6
Department of Molecular Microbiology & Immunology, Oregon Health Sciences University, Portland,
Oregon,1 and
Center for Cancer Research,
Department of Biology, Massachusetts Institute of Technology,
Cambridge, Massachusetts2
Received 16 December 1997/Accepted 19 February 1998
Herpes simplex virus types 1 and 2 (HSV-1 and HSV-2) express an
immediate-early protein, ICP47, that effectively inhibits the human
transporter associated with antigen presentation (TAP), blocking major
histocompatibility complex (MHC) class I antigen presentation to
CD8+ T cells. Previous work indicated that the mouse TAP is
relatively resistant to inhibition by the HSV-1 and HSV-2 ICP47
proteins (ICP47-1 and ICP47-2) and that mouse cells infected with HSV-1 are lysed by anti-HSV CD8+ cytotoxic T lymphocytes (CTL).
Therefore, mice are apparently not suitable animals in which to study
the in vivo effects of ICP47. In order to find an animal model, we
introduced ICP47-1 and ICP47-2 into cells from various animal
species
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Inhibition of Major Histocompatibility Complex
Class I Antigen Presentation in Pig and Primate Cells by
Herpes Simplex Virus Type 1 and 2 ICP47

and
mice, rats, guinea pigs, rabbits, dogs, pigs, cows, monkeys,
and humans
and measured TAP activity in the cells. Both proteins were
unable to inhibit TAP in mouse, rat, guinea pig, and rabbit cells. In contrast, ICP47-1 and ICP47-2 inhibited TAP in pig, dog, cow, and
monkey cells, and the TAP in pig and dog fibroblasts was often more
sensitive to both proteins than TAP in human fibroblasts. These results
were extended by measuring CD8+-T-cell recognition (CTL
lysis) of cells from various species. Cells were infected with
recombinant HSV-1 constructed to express murine MHC class I proteins so
that the cells would be recognized and lysed by well-characterized
murine anti-HSV CTL unless antigen presentation was blocked by ICP47.
Anti-HSV CD8+ CTL effectively lysed pig and primate cells
infected with a recombinant HSV-1 ICP47
mutant but were
unable to lyse pig or primate cells infected with a recombinant HSV-1
that expressed ICP47. Therefore, pigs, dogs, and monkeys may be useful
animal models in which to test the effects of ICP47 on HSV pathogenesis
or the use of ICP47 as a selective immunosuppressive agent.
*
Corresponding author. Mailing address: L-220, Dept. of
Molecular Microbiology & Immunology, Oregon Health Sciences University, 3181 S.W. Sam Jackson Park Rd., Portland, OR 97201. Phone: (503) 494-0834. Fax: (503) 494-6862. E-mail: johnsoda{at}ohsu.edu.
Present address: University of Toronto Medical School, Toronto,
Ontario, Canada.
Present address: Department of Pathology, Harvard Medical School,
Boston, Mass.
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