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- W2108909957 abstract "These studies tested whether antigenic competition between T cells occurs. We generated CD8(+) T cell responses in H-2(b) mice against the dominant ovalbumin epitope SIINFEKL (ova8) and subdominant epitope KRVVFDKL, using either vaccinia virus expressing ovalbumin (VV-ova) or peptide-pulsed dendritic cells. CD8(+) T cell responses were visualized by major histocompatibility complex class I-peptide tetrameric molecules. Transfer of transgenic T cells with high affinity for ova8 (OT1 T cells) completely inhibited the response of host antigen-specific T cells to either antigen, demonstrating that T cells can directly compete with each other for response to antigen. OT1 cells also inhibited CD8(+) T cell responses to an unrelated peptide, SIYRYGGL, providing it was presented on the same dendritic cells as ova8. These inhibitions were not due to a more rapid clearance of virus or antigen-presenting cells (APCs) by the OT1 cells. Rather, the inhibition was caused by competition for antigen and antigen-bearing cells, since it could be overcome by the injection of large numbers of antigen-pulsed dendritic cells. These results imply that common properties of T cell responses, such as epitope dominance and secondary response affinity maturation, are the result of competitive interactions between antigen-bearing APC and T cell subsets." @default.
- W2108909957 created "2016-06-24" @default.
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- W2108909957 date "2000-10-09" @default.
- W2108909957 modified "2023-09-25" @default.
- W2108909957 title "T Cells Compete for Access to Antigen-Bearing Antigen-Presenting Cells" @default.
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- W2108909957 doi "https://doi.org/10.1084/jem.192.8.1105" @default.
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