studies of cultured lung epithelial cells and fibroblasts demonstrated that these concentrations of reduced glutathione were sufficient to protect these cells against the burden of h2o2 in the range released by alveolar macrophages removed from the lower respiratory tract of nonsmokers and smokers , respectively , suggesting that the glutathione present in the alveolar elf of normal individuals likely contributes to the protective screen against oxidants in the extracellular milieu of the lower respiratory tract .
C0016030
fibroblasts
C0007634
cells