when bovine pulmonary artery endothelial monolayers were exposed to hyperoxia ( 95 % o2 and 5 % co2 ) , they responded by selectively elevating the intracellular concentration of glutathione without affecting the activities of glutathione peroxidase or glutathione reductase , l-2-oxothiazolidine-4-carboxylate , an intracellular cysteine-delivering agent , further enhanced the intracellular concentration of glutathione in oxygen-exposed endothelial cells and protected them from the lethal effect of hyperoxia .
C0014257
endothelial
C0225336
endothelial cells