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Polyomavirus-Infected Dendritic Cells Induce Antiviral CD8+ T Lymphocytes

By Donald R. Drake, Janice M. Moser, Annette Hadley, John D. Altman, Charles Maliszewski, Eric Butz and Aron E. Lukacher


CD8+ T cells are critical for the clearance of acute polyomavirus infection and the prevention of polyomavirus-induced tumors, but the antigen-presenting cell(s) involved in generating polyomavirus-specific CD8+ T cells have not been defined. We investigated whether dendritic cells and macrophages are permissive for polyomavirus infection and examined their potential for inducing antiviral CD8+ T cells. Although dendritic cells and macrophages both supported productive polyomavirus infection, dendritic cells were markedly more efficient at presenting the immunodominant viral epitope to CD8+ T cells. Additionally, infected dendritic cells, but not infected macrophages, primed anti-polyomavirus CD8+ T cells in vivo. Treatment with Flt3 ligand, a hematopoietic growth factor that dramatically expands the number of dendritic cells, markedly enhanced the magnitude of virus-specific CD8+ T-cell responses during acute infection and the pool of memory anti-polyomavirus CD8+ T cells. These findings suggest that virus-infected dendritic cells induce polyomavirus-specific CD8+ T cells in vivo and raise the potential for their use as cellular adjuvants to promote CD8+ T cell surveillance against polyomavirus-induced tumors

Topics: Pathogenesis and Immunity
Publisher: American Society for Microbiology
Year: 2000
OAI identifier:
Provided by: PubMed Central
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