Fig. 3From: PDGFBB improved the biological function of menstrual blood-derived stromal cells and the anti-fibrotic properties of exosomesPDGFBB pretreatment did not affect the secretory properties of MenSCs. a Size distribution of MenSCs-EXO examined by NTA; b Western blot of CD63 and TSG101 of MenSCs-EXO; Full-length blots are presented in Additional file 2: Fig. S2a; c Morphology of MenSCs-EXO observed by TEM (scale bar = 500 nm); d BCA analysis of EXO protein concentration. Data were mean ± SD, *P < 0.05, **P < 0.01, ***P < 0.001 for One Way ANOVABack to article page