Fig. 4

hBM-MSCs-Ex increases Ki-67⁺ and decreases α-SMA⁺ in a rat model of liver fibrosis. a Photomicrographs of liver tissue sections showing IHC staining for α-SMA and Ki-67 (black arrows indicate brown-positive cells, bar = 1 mm). b–d Quantification of α-SMA and Ki-67-positive cells was performed by computer-assisted image analysis. **p < 0.01, ***p < 0.001. Data: n = 12; mean ± SD