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Journal of Virology, September 2001, p. 8283-8288, Vol. 75, No. 17
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.17.8283-8288.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Latent Antigen Vaccination in a Model
Gammaherpesvirus Infection
Edward J.
Usherwood,1,
Kimberley A.
Ward,1,
Marcia A.
Blackman,1
James P.
Stewart,2 and
David L.
Woodland1,*
The Trudeau Institute, Saranac Lake, New York
12983,1 and The Laboratory for Clinical
and Molecular Virology, Department of Veterinary Pathology, The
University of Edinburgh, Edinburgh EH9 1QH, United
Kingdom2
Received 3 April 2001/Accepted 4 June 2001
Vaccines that can reduce the load of latent gammaherpesvirus
infections are eagerly sought. One attractive strategy is vaccination against latency-associated proteins, which may increase the efficiency with which T cells recognize and eliminate latently infected cells. However, due to the lack of tractable animal model systems, the effect
of latent-antigen vaccination on gammaherpesvirus latency is not known.
Here we use the murine gammaherpesvirus model to investigate the impact
of vaccination with the latency-associated M2 antigen. As expected,
vaccination had no effect on the acute lung infection. However, there
was a significant reduction in the load of latently infected cells in
the initial stages of the latent infection, when M2 is expressed. These
data show for the first time that latent-antigen vaccination can reduce
the level of latency in vivo and suggest that vaccination strategies
involving other latent antigens may ultimately be successfully used to
reduce the long-term latent infection.
*
Corresponding author. Mailing address: The Trudeau
Institute, 100 Algonquin Ave., Saranac Lake, NY 12983. Phone: (518)
891-3080, ext. 314. Fax: (518) 891-5126. E-mail:
dwoodland{at}trudeauinstitute.org.

Present address: Department of Microbiology and Immunology,
Dartmouth Medical School, Lebanon, N.H.

Present address: University of Vermont, Department of Pathology,
Burlington, VT
05405.
Journal of Virology, September 2001, p. 8283-8288, Vol. 75, No. 17
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.17.8283-8288.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
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