CD8 controls T cell cross-reactivity

Wooldridge, Linda, Laugel, Bruno Frederic, Ekeruche, Julia, Clement, Mathew ORCID: https://orcid.org/0000-0002-9280-5281, van den Berg, Hugo A., Price, David ORCID: https://orcid.org/0000-0001-9416-2737 and Sewell, Andrew K. ORCID: https://orcid.org/0000-0003-3194-3135 2010. CD8 controls T cell cross-reactivity. The Journal of Immunology 185 (8) , pp. 4625-4632. 10.4049/jimmunol.1001480

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Abstract

Estimates of human αβ TCR diversity suggest that there are <108 different Ag receptors in the naive T cell pool, a number that is dwarfed by the potential number of different antigenic peptide-MHC (pMHC) molecules that could be encountered. Consequently, an extremely high degree of cross-reactivity is essential for effective T cell immunity. Ag recognition by T cells is unique in that it involves a coreceptor that binds at a site distinct from the TCR to facilitate productive engagement of the pMHC. In this study, we show that the CD8 coreceptor controls T cell cross-reactivity for pMHCI Ags, thereby ensuring that the peripheral T cell repertoire is optimally poised to negotiate the competing demands of responsiveness in the face of danger and quiescence in the presence of self.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine Systems Immunity Research Institute (SIURI)
Subjects:	Q Science > QR Microbiology > QR180 Immunology
Publisher:	American Association of Immunologists
ISSN:	0022-1767
Last Modified:	27 Jul 2023 01:07
URI:	https://orca.cardiff.ac.uk/id/eprint/29832

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