Figure 5. Effects on MC apoptosis. (A) The expression of apoptosis-related proteins was detected in hearts. (B) TUNEL staining was performed to mark apoptotic cells, and the number of TUNEL-positive cells in each group was determined. N=5-8 in each group. * p<0.05 vs. the young WT group; # p<0.05 vs. the aging WT group.