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A narrow T cell receptor repertoire instructs thymic differentiation of MHC class Ib–restricted CD8+ regulatory T cells
Hye-Jung Kim, … , Jamil R. Azzi, Harvey Cantor
Hye-Jung Kim, … , Jamil R. Azzi, Harvey Cantor
Published November 7, 2023
Citation Information: J Clin Invest. 2024;134(1):e170512. https://doi.org/10.1172/JCI170512.
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Research Article Immunology Article has an altmetric score of 46

A narrow T cell receptor repertoire instructs thymic differentiation of MHC class Ib–restricted CD8+ regulatory T cells

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Abstract

Although most CD8+ T cells are equipped to kill infected or transformed cells, a subset may regulate immune responses and preserve self-tolerance. Here, we describe a CD8 lineage that is instructed to differentiate into CD8 T regulatory cells (Tregs) by a surprisingly restricted set of T cell receptors (TCRs) that recognize MHC-E (mouse Qa-1) and several dominant self-peptides. Recognition and elimination of pathogenic target cells that express these Qa-1–self-peptide complexes selectively inhibits pathogenic antibody responses without generalized immune suppression. Immunization with synthetic agonist peptides that mobilize CD8 Tregs in vivo efficiently inhibit antigraft antibody responses and markedly prolong heart and kidney organ graft survival. Definition of TCR-dependent differentiation and target recognition by this lineage of CD8 Tregs may open the way to new therapeutic approaches to inhibit pathogenic antibody responses.

Authors

Hye-Jung Kim, Hidetoshi Nakagawa, John Y. Choi, Xuchun Che, Andrew Divris, Qingshi Liu, Andrew E. Wight, Hengcheng Zhang, Anis Saad, Zhabiz Solhjou, Christa Deban, Jamil R. Azzi, Harvey Cantor

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