Figure 3. MIF rejuvenated aged MSCs by promoting autophagy. (A) Western blotting and quantitative analysis of LC3I/II, Beclin1, p62, p53 and p21 protein expression in aged MSCs and MIF-aged MSCs with or without 3-MA treatment. (B) Representative images of TUNEL staining and quantitative analysis of the apoptosis of aged MSCs and MIF-aged MSCs with or without 3-MA treatment under an SD/H challenge. Scale bar=100 μm. Data are expressed as the mean±SEM. n=3. **p<0.01; ***p<0.001.