although the prototypic serine protease inhibitor phenyl methylsulfonylfluoride ( pmsf ) protected endothelium from pmns , pure alpha-1-pi ( also a potent anti-elastase ) when added in physiologic amounts did not protect endothelial cells from pmn assault , suggesting that pmn oxidants might inactivate it .
C0014257
endothelium
C0225336
endothelial cells