Changes in expression of TGF-β and collagen in wild-type and acatalasemic mice. TGF-β mRNA (A), collagen III mRNA (B) and total collagen content (C) of the lungs are higher in acatalasemic mice at 7 and 14 days, at 7 days, and 14 days, respectively. β2MG, β2-microglobulin. *; p < 0.05 vs. Day 0. Day 0; untreated, Day 7; 7 days after bleomycin administration, Day 14; 14 days after bleomycin administration.