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Oxidant Sensing by TRPM2 Inhibits Neutrophil Migration and Mitigates Inflammation #MMPMID27569419
Wang G; Cao L; Liu X; Sieracki NA; Di A; Wen X; Chen Y; Taylor S; Huang X; Tiruppathi C; Zhao Yy; Song Y; Gao X; Jin T; Bai C; Malik AB; Xu J
Dev Cell 2016[Sep]; 38 (5): 453-62 PMID27569419show ga
Blood neutrophils perform an essential host-defense function by directly migrating to bacterial invasion sites to kill bacteria. The mechanisms mediating the transition from the migratory to bactericidal phenotype remain elusive. Here, we demonstrate that TRPM2, a trp superfamily member, senses neutrophil-generated reactive oxygen species and restrains neutrophil migration. The inhibitory function of oxidant sensing by TRPM2 requires the oxidation of Cys549, which then induces TRMP2 binding to formyl peptide receptor 1 (FPR1) and subsequent FPR1 internalization and signaling inhibition. The oxidant sensing-induced termination of neutrophil migration at the site of infection permits a smooth transition to the subsequent microbial killing phase.