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Virology. 2005 Sep 30;340(2):296-306.

Antigen-specific and non-specific CD4+ T cell recruitment and proliferation during influenza infection.

Author information

  • 1Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, Aab Institute of Biomedical Sciences, University of Rochester Medical Center, NY 14642, USA.

Abstract

To track epitope-specific CD4(+) T cells at a single-cell level during influenza infection, the MHC class II-restricted OVA(323-339) epitope was engineered into the neuraminidase stalk of influenza/A/WSN, creating a surrogate viral antigen. The recombinant virus, influenza A/WSN/OVA(II), replicated well, was cleared normally, and stimulated both wild-type and DO11.10 or OT-II TCR transgenic OVA-specific CD4(+) T cells. OVA-specific CD4 T cells proliferated during infection only when the OVA epitope was present. However, previously primed (but not naive) transgenic CD4(+) T cells were recruited to the infected lung both in the presence and absence of the OVA(323-339) epitope. These data show that, when primed, CD4(+) T cells may traffic to the lung in the absence of antigen, but do not proliferate. These results also document a useful tool for the study of CD4 T cells in influenza infection.

PMID:
16054188
[PubMed - indexed for MEDLINE]
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