Fig. 3

MSC-exo Ameliorated PDGFBB-Induced PASMC Migration. A: Cell migration assessed by wound healing assay (Scale bar = 100 μm); B: Percentage of wound closure of PASMCs induced by PDGFBB at 24 h and 48 h; (n ≥ 3); Data are presented as mean ± SEM; **** indicates P < 0.0001, *** indicates P < 0.001, and ** indicates P < 0.01 for normoxia vs. PDGFBB. #### indicates P < 0.0001, ### indicates P < 0.001, and ## indicates P < 0.01 for MSC-exo vs. PDGFBB.