Continuous CD8⁺ T-cell priming by dendritic cell cross-presentation of persistent antigen following adeno-associated

Dan Xu1, Christopher M Walker

  • 1Center for Vaccines and Immunity, The Research Institute at Nationwide Children's Hospital, 700 Children's Drive, Columbus, OH 43205, USA.

Journal of Virology
|September 2, 2011
PubMed

Recombinant adeno-associated virus (rAAV) vectors establish persistent transgene expression in the skeletal muscle of mice. How dendritic cells acquire encoded antigens for CD8(+) T-cell priming is unknown. Here we document CD8(+) T-cell priming after lethal irradiation and bone marrow reconstitution of mice treated with an AAV vector several weeks earlier. Temporal separation of vector delivery and successful class I antigen presentation indicated that T-cell priming does not necessarily require antigen synthesis in AAV-transduced dendritic cells. An apparent cross-presentation of antigen acquired from muscle suggests that strategies to limit transgene expression in dendritic cells will not prevent unwanted CD8(+) T-cell responses.

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