IL-10–dependent regulation of intestinal health.

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Presentation transcript:

IL-10–dependent regulation of intestinal health. IL-10–dependent regulation of intestinal health. T cells, especially Treg cells, are the critical cellular source of IL-10 in the mammalian intestine. The gut microbiota is critical for the induction of intestinal Treg cells and IL-10 production. B. fragilis–derived PSA acts on DCs, resulting in IL-10 expression. In addition, bacteria-stimulated macrophage can also directly secrete IL-10 and support Treg cell development. Thus, DC-derived IL-10 binds to IL-10R expressed on Treg cells, which induces STAT3 activation and the expression of abundant IL-10. IL-10 limits TH1 and TH17 cell differentiation through inhibition of IL-12 and IL-23, respectively. Treg-derived IL-10 drives macrophages to execute tolerogenic functions and maintain intestinal homeostasis. In addition, IL-10 regulates cellular metabolism in macrophages by suppressing mTOR activity, thus reducing glucose uptake and glycolysis while promoting oxidative phosphorylation. Essential pathways that prevent spontaneous inflammation are highlighted in red. Lei Zhou, and Gregory F. Sonnenberg Sci. Immunol. 2018;3:eaao1605 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works