Figure 3
Effect of hyperoxia on TGF-β1 and CTGF expression. A549 cells were exposed to 21% up to 95% O2 and TGF-β1 and CTGF were assessed by semi-quantitative RT-PCR, and their ratio with β-actin quantified by densitometery (3A and 3B). The figures are illustrative of a minimum of 4 experiments. TGF-β1: transforming growth factor beta; CTGF: connective tissue growth factor; O2: oxygen. *P < 0.05, **P ≤ 0.02, #P ≤ 0.01.