KCNJ2 and brain ischemia: Laser speckle contrast imaging of the brain revealed an impaired perfusion recovery in Nfat5(EC)−/− versus Nfat5fl/fl mice after MCAO.Collectively, NFAT5 in arterial BEC is required for an adequate reperfusion response after brain ischemia that is presumably dependent on the maintenance of Kcnj2 expression.