Fig. 1. Dose response curves for 5’-Aza-dC-treated cultures and a cell proliferation assay.

a Cellular viability reached its peak at the dosage of 15 μM at t = 72 h. b The proliferation capacity of MSCs at t = 24 h, 48 h and 72 h. *P < 0.05 vs. ONFH group, 5’-Aza-dC group at t = 24 h; **P < 0.01 vs. ONFH group at t = 48 h; ***P < 0.001 vs. ONFH group at t = 72 h; ^#P > 0.05 vs. ONFH group at t = 24 h, 48 h; ^##P > 0.05 vs. 5’-Aza-dC group at t = 72 h; ^$P < 0.01 vs. ONFH group at t = 72 h