Fig. 4

uMSC-EVs inhibited myofibroblast differentiation in lung tissues of BLM-induced mice. a, b Expression levels of α-SMA and Fn were detected using IF staining and qRT-PCR. Scale bar = 200 μm. Mean ± SEM; **p < 0.01, ***p < 0.001; n = 5. α-SMA, α-smooth muscle actin; Fn, fibronectin