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TCF-1 limits the formation of Tc17 cells via repression of the MAF-ROR?t axis.


ABSTRACT: Interleukin (IL)-17-producing CD8+ T (Tc17) cells have emerged as key players in host-microbiota interactions, infection, and cancer. The factors that drive their development, in contrast to interferon (IFN)-?-producing effector CD8+ T cells, are not clear. Here we demonstrate that the transcription factor TCF-1 (Tcf7) regulates CD8+ T cell fate decisions in double-positive (DP) thymocytes through the sequential suppression of MAF and ROR?t, in parallel with TCF-1-driven modulation of chromatin state. Ablation of TCF-1 resulted in enhanced Tc17 cell development and exposed a gene set signature to drive tissue repair and lipid metabolism, which was distinct from other CD8+ T cell subsets. IL-17-producing CD8+ T cells isolated from healthy humans were also distinct from CD8+IL-17- T cells and enriched in pathways driven by MAF and ROR?t Overall, our study reveals how TCF-1 exerts central control of T cell differentiation in the thymus by normally repressing Tc17 differentiation and promoting an effector fate outcome.

SUBMITTER: Mielke LA 

PROVIDER: S-EPMC6605755 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Interleukin (IL)-17-producing CD8<sup>+</sup> T (Tc17) cells have emerged as key players in host-microbiota interactions, infection, and cancer. The factors that drive their development, in contrast to interferon (IFN)-γ-producing effector CD8<sup>+</sup> T cells, are not clear. Here we demonstrate that the transcription factor TCF-1 (<i>Tcf7</i>) regulates CD8<sup>+</sup> T cell fate decisions in double-positive (DP) thymocytes through the sequential suppression of MAF and RORγt, in parallel wi  ...[more]

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