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IL-27 triggers IL-10 production in Th17 cells via a c-Maf/ROR?t/Blimp-1 signal to promote the progression of endometriosis #MMPMID28300844
Chang KK; Liu LB; Jin LP; Zhang B; Mei J; Li H; Wei CY; Zhou WJ; Zhu XY; Shao J; Li DJ; Li MQ
Cell Death Dis 2017[Mar]; 8 (3): e2666- PMID28300844show ga
Endometriosis is an estrogen-dependent inflammatory disease. The anti-inflammatory cytokine IL-10 is also increased in endometriosis. IL-10 production by Th17 cells is critical for limiting autoimmunity and inflammatory responses. However, the mechanism of inducing IL-10-producing Th17 cells is still largely unknown. The present study investigated the differentiation mechanism and role of IL-10-producing Th17 cells in endometriosis. Here, we report that IL-10+Th17 cells are significantly increased in the peritoneal fluid of women with endometriosis, along with an elevation of IL-27, IL-6 and TGF-?. Compared with peripheral CD4+ T cells, endometrial CD4+ T cells highly expressed IL-27 receptors, especially the ectopic endometrium. Under external (2,3,7,8-tetrachlorodibenzo-p-dioxin, TCDD) and local (estrogen, IL-6 and TGF-?) environmental regulation, IL-27 from macrophages and endometrial stromal cells (ESCs) induces IL-10 production in Th17 cells in vitro and in vivo. This process may be mediated through the interaction between c-musculoaponeurotic fibrosarconna (c-Maf) and retinoic acid-related orphan receptor gamma t (ROR?t), and associated with the upregulation of downstream B lymphocyte-induced maturation protein-1 (Blimp-1). IL-10+Th17 cells, in turn, stimulate the proliferation and implantation of ectopic lesions and accelerate the progression of endometriosis. These results suggest that IL-27 is a pivotal regulator in endometriotic immune tolerance by triggering Th17 cells to produce IL-10 and promoting the rapid growth and implantation of ectopic lesions. This finding provides a scientific basis for potential therapeutic strategies aimed at preventing the development of endometriosis, especially for patients with high levels of IL-10+Th17 cells.