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Eur J Immunol. 2011 Sep;41(9):2612-8. doi: 10.1002/eji.201041075. Epub 2011 Aug 4.

Batf3 transcription factor-dependent DC subsets in murine CMV infection: differential impact on T-cell priming and memory inflation.

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  • 1Institute of Microbiology, ETH Zurich, Zurich, Switzerland.


Priming of CD8(+) T cells specific for viruses that interfere with the MHC class I presentation pathway is a challenge for the immune system and is believed to rely on cross-presentation. Cytomegalovirus (CMV) infection induces vigorous CD8(+) T-cell responses despite its potent immune evasion strategies. Furthermore, CD8(+) T cells specific for a subset of viral epitopes accumulate and are maintained at high levels exhibiting an activated phenotype - referred to as "inflationary T cells". Taking advantage Batf3(-/-) mice in which the development of cross-presenting CD8α(+) and CD103(+) DCs is severely compromised, we analyzed their role in the induction and inflation of murine (M)CMV-specific CD8(+) T-cell responses. We found that priming of MCMV-specific CD8(+) T cells was severely impaired in the absence of cross-presenting DCs. However, inflation of two immuno-dominant MCMV-specific CD8(+) T-cell populations was largely normal in the absence of cross-presenting DCs, indicating that inflation during latency was mainly dependent on direct antigen presentation. These results highlight differential antigen presentation requirements during acute and latent MCMV infection.

Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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