Figure 5. 293T cells treated with different concentrations of t-BHP and stained with SA-β-gal (×100). BMSCs were treated with t-BHP at concentrations of 0 μmol/L (A), 100 μmol/L (B), 200 μmol/L (C), 300 μmol/L (D), 400 μmol/L (E), and 500 μmol/L (F). We have quantified the apoptosis rate in (G). Induction with 200 μmol/L t-BHP for 6 h was performed to establish the aging macaque BMSC model.