Fig. 6

UCB-MSC-exo-derived specific miRNAs target TGF-β receptors to inhibit myofibroblast differentiation. A List of predicted binding sites for UCB-MSC-exo-miRNAs and their targets. B–D Expression levels of TGFBR2 and α-SMA in HDFs treated with miR-21-5p-mimics. E–G Expression levels of TGF-βR1 and α-SMA in HDFs treated with miR-125b-5p-mimics; scale bar = 100 μm; ^*p < 0.05; ^**p < 0.01; ^***p < 0.001; means ± SD; n = 3