(a)
(b)
(c)
(d)
Figure 2: Comparison of the expression levels in vitro and in vivo. (a) is TGF-β1/SMAD and Nrf2/HO-1 in vitro, (b) is densitometric analysis relative to β-actin in vitro, (c) is TGF-β1/SMAD and Nrf2/HO-1 in vivo, and (d) is densitometric analysis relative to in vivo. The difference was statistically significant (). And the experiments were repeated for three times.