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CD8 controls T cell cross-reactivity

Wooldridge, Linda, Laugel, Bruno Frederic, Ekeruche, Julia, Clement, Mathew ORCID:, van den Berg, Hugo A., Price, David ORCID: and Sewell, Andrew K. ORCID: 2010. CD8 controls T cell cross-reactivity. The Journal of Immunology 185 (8) , pp. 4625-4632. 10.4049/jimmunol.1001480

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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

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