Download MendeleySymbiotic bacteria-dependent expansion of MR1-reactive T cells causes autoimmunity in the absence of Bcl11b.
Shibata, K., Motozono, C., Nagae, M., Shimizu, T., Ishikawa, E., Motooka, D., Okuzaki, D., Izumi, Y., Takahashi, M., Fujimori, N., Wing, J.B., Hayano, T., Asai, Y., Bamba, T., Ogawa, Y., Furutani-Seiki, M., Shirai, M., Yamasaki, S.(2022) Nat Commun 13: 6948-6948
- PubMed: 36376329
- DOI: https://doi.org/10.1038/s41467-022-34802-8
- Primary Citation of Related Structures:
7F5K - PubMed Abstract:
MHC class I-related protein 1 (MR1) is a metabolite-presenting molecule that restricts MR1-reactive T cells including mucosal-associated invariant T (MAIT) cells. In contrast to MAIT cells, the function of other MR1-restricted T cell subsets is largely unknown. Here, we report that mice in which a T cell-specific transcription factor, B-cell lymphoma/leukemia 11B (Bcl11b), was ablated in immature thymocytes (Bcl11b ∆iThy mice) develop chronic inflammation. Bcl11b ∆iThy mice lack conventional T cells and MAIT cells, whereas CD4 + IL-18R + αβ T cells expressing skewed Traj33 (Jα33) + T cell receptors (TCR) accumulate in the periphery, which are necessary and sufficient for the pathogenesis. The disorders observed in Bcl11b ∆iThy mice are ameliorated by MR1-deficiency, transfer of conventional T cells, or germ-free conditions. We further show the crystal structure of the TCR expressed by Traj33 + T cells expanded in Bcl11b ∆iThy mice. Overall, we establish that MR1-reactive T cells have pathogenic potential.
Organizational Affiliation:
Department of Microbiology and Immunology, Graduate School of Medicine, Yamaguchi University, Ube, 755-8505, Japan.
