Within the interleukin-17 （IL-17） family of cytokines, IL-17A is known to be critical in the host defense against fungal infections; however, the function of the other IL-17 family members in anti-fungal immunity re...Within the interleukin-17 （IL-17） family of cytokines, IL-17A is known to be critical in the host defense against fungal infections; however, the function of the other IL-17 family members in anti-fungal immunity remains largely unknown. Here, we show that IL-17C expression was highly induced in kidney epithelial cells after fungal infection. Mice that lacked IL-17C exhibited increased survival and attenuated kidney tissue damage, although they had similar fungal loads. IL-17C deficiency resulted in decreased pro-inflammatory cytokine expression compared with wild-type control mice. Additionally, IL-17C directly acted on renal epithelial cells in vitro to promote pro-inflammatory cytokine production. Taken together, our data demonstrate that IL-17C is a critical factor that potentiates inflammatory responses and causes host injury during fungal infection.展开更多
The dysfunction of innate immunity components is one of the major drivers for ulcerative colitis(UC),and increasing reports indicate that the gut microbiome serves as an intermediate between genetic mutations and UC d...The dysfunction of innate immunity components is one of the major drivers for ulcerative colitis(UC),and increasing reports indicate that the gut microbiome serves as an intermediate between genetic mutations and UC development.Here,we find that the IL-17 receptor subunit,CMTM4,is reduced in UC patients and dextran sulfate sodium(DSS)-induced colitis.The deletion of CMTM4(Cmtm4^(-/-))in mice leads to a higher susceptibility to DSS-induced colitis than in wild-type,and the gut microbiome significantly changes in composition.The causal role of the gut microbiome is confirmed with a cohousing experiment.We further identify that S100a8/9 is significantly up-regulated in Cmtm4^(-/-)colitis,with the block of its receptor RAGE that reverses the phenotype associated with the CMTM4 deficiency.CMTM4 deficiency rather suppresses S100a8/9 expression in vitro via the IL17 pathway,further supporting that the elevation of S100a8/9 in vivo is most likely a result of microbial dysbiosis.Taken together,the results suggest that CMTM4 is involved in the maintenance of intestinal homeostasis,suppression of S100a8/9,and prevention of colitis development.Our study further shows CMTM4 as a crucial innate immunity component,confirming its important role in UC development and providing insights into potential targets for the development of future therapies.展开更多
文摘Within the interleukin-17 （IL-17） family of cytokines, IL-17A is known to be critical in the host defense against fungal infections; however, the function of the other IL-17 family members in anti-fungal immunity remains largely unknown. Here, we show that IL-17C expression was highly induced in kidney epithelial cells after fungal infection. Mice that lacked IL-17C exhibited increased survival and attenuated kidney tissue damage, although they had similar fungal loads. IL-17C deficiency resulted in decreased pro-inflammatory cytokine expression compared with wild-type control mice. Additionally, IL-17C directly acted on renal epithelial cells in vitro to promote pro-inflammatory cytokine production. Taken together, our data demonstrate that IL-17C is a critical factor that potentiates inflammatory responses and causes host injury during fungal infection.
基金National Natural Science Foundation of China(No.81870386)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB29020000)who supported this research.
文摘The dysfunction of innate immunity components is one of the major drivers for ulcerative colitis(UC),and increasing reports indicate that the gut microbiome serves as an intermediate between genetic mutations and UC development.Here,we find that the IL-17 receptor subunit,CMTM4,is reduced in UC patients and dextran sulfate sodium(DSS)-induced colitis.The deletion of CMTM4(Cmtm4^(-/-))in mice leads to a higher susceptibility to DSS-induced colitis than in wild-type,and the gut microbiome significantly changes in composition.The causal role of the gut microbiome is confirmed with a cohousing experiment.We further identify that S100a8/9 is significantly up-regulated in Cmtm4^(-/-)colitis,with the block of its receptor RAGE that reverses the phenotype associated with the CMTM4 deficiency.CMTM4 deficiency rather suppresses S100a8/9 expression in vitro via the IL17 pathway,further supporting that the elevation of S100a8/9 in vivo is most likely a result of microbial dysbiosis.Taken together,the results suggest that CMTM4 is involved in the maintenance of intestinal homeostasis,suppression of S100a8/9,and prevention of colitis development.Our study further shows CMTM4 as a crucial innate immunity component,confirming its important role in UC development and providing insights into potential targets for the development of future therapies.
