mRNA expression of fibrotic markers collagen Ia (a), collagen IV (b), fibronectin (c), and percentage of α-SMA positive area (d) marked with black arrows in IHC staining (e, 40×). The results are expressed as mean ± SEM, n = 5–6. * p < 0.05, ** p < 0.01, *** p < 0.001.