TGFB1 and pulmonary fibrosis: Oral treatment with NAC (490 mg/kg b.w.)given to bleomycin-injured rats from day 0 reversed the lysyl oxidase activity, which is essential for collagen deposition, to normal levels; elevated the levels of lung GSH; partially attenuated pulmonary fibrosis; and inhibited TGF-β(1) and α-SMA expressions [75].