期刊
FRONTIERS IN IMMUNOLOGY
卷 9, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2018.02724
关键词
IL-17C; Acute graft-vs.-host disease; Treg cells; intestinal barrier functions; inflammation; transplantation
类别
资金
- National Natural Science Foundation of China [81471586, 815715556, 31500728, 81400145, 81500146]
- Natural Science foundation of Jiangsu province [BK201500352, BK20150356]
- China Postdoctoral Science Foundation [7131702415]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Innovation Capability Development Project of Jiangsu Province [BM2015004]
- National Key Research and Development Program [2016YFC0902800, 2017YFA0104502, 2017ZX09304021]
- National University of Singapore
Acute graft-vs.-host disease (aGVHD) is one of the major complications and results in high mortality after allogeneic hematopoietic stem cell transplantation (allo-HSCT). IL-17C is involved in many inflammatory immune disorders. However, the role of IL-17C in aGVHD remains unknown. Here we demonstrated that IL-17C deficiency in the graft significantly promoted alloreactive T cell responses and induced aggravated aGVHD compared with wildtype donors in a fully MHC-mismatched allo-HSCT model. In contrast, IL-17C overexpression ameliorated aGVHD. IL-17C deficiency increased intestinal epithelial permeability and elevated inflammatory cytokine production, leading to an enhanced aGVHD progression. Tregs was reduced in recipients of IL-17C(-/-) graft, whilst restored after IL-17C overexpression. Decreased Treg differentiation was abrogated after neutralizing IFN-gamma, but not IL-6. Moreover, depletion of Tregs diminished the protective effect of IL-17C. Of note, patients with low IL-17C expression displayed higher aGVHD incidence together with poor overall survival, thereby IL-17C could be an independent risk factor for aGVHD development. Our results are the first demonstrating the protective role of IL-17C in aGVHD by promoting intestinal barrier functions and Treg differentiation in a MHC fully mismatched murine aGVHD model. IL-17C may serve as a novel biomarker and potential therapeutic target for aGVHD.
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