Phosphatase Wip1 Masters IL-17-producing Neutrophil-mediated Colitis in Mice

Inflammatory Bowel Diseases
Xuelian HuYong Zhao

Abstract

Wild-type p53-induced phosphatase 1 (Wip1) is currently believed to be a promising drug target for cancer therapy. Our recent studies showed that deletion of Wip1 remarkably promoted neutrophil inflammatory response. Whether Wip1 is involved in the regulation of inflammatory bowel disease is unknown. In the present study, we found that Wip1 knockout (KO) mice were more susceptible to colitis induced by dextran sulphate sodium (DSS) than wild-type mice as substantiated by the lower mouse survival ratio, rapid bodyweight loss, increased disease activity index, shorter colon length, and more severe pathology of colons in Wip1KO mice. Using full bone marrow chimera mouse models, we demonstrated that Wip1 intrinsically controls inflammatory response of immune cells. Deletion of IL-17 (Wip1/IL-17 double KO mice) significantly rescued the pathology in Wip1KO mice. Neutrophils of DSS-treated wild-type and Wip1KO mice expressed significantly higher IL-17. After adoptive transfer of sorted Wip1KO or double KO neutrophils into IL-17KO mice, mice receiving double KO neutrophils were more resistant to DSS-induced colitis than mice receiving Wip1KO neutrophils. These data collectively indicate that Wip1 modulates host sensitivity to colitis ...Continue Reading

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Citations

Feb 2, 2017·Frontiers in Immunology·Xiao-Fei ShenJun-Feng Du

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