Pannexin-1 infl uences peritoneal cavity cell population but is not involved in NLRP3 infl ammasome activation

Pannexin-1(Panx1)forms nonselective large channel in cell plasma membrane and has been shown to be associated with NLRP3 inflammasome activation,ATP release and phagocytes recruitment.In the current study,by manipulation of Panx1 expression in human myeloid cells and application of Panx1 defi cient mice,we failed to fi nd a correlation between Panx1 and NLRP3 infl ammasome activation,although an interaction between these two proteins was evident.However,in thioglycollate induced peritonitis,Panx1 defi cient mice showed much more phagocytes infiltration.Further analyses showed that mice defi cient for Panx1 exhibited enlarged F4/80^(low)Gr1-Ly6C-cell population in the peritonea.Our study thus reveals an important role for Panx1 in regulation of peritoneal cell population and peritonitis development.