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Kallistatin (KS) alleviates H2O2‐induced endothelial senescence in human endothelial cells. Representative images of SA‐β‐gal staining (A), and quantitative analysis of positive SA‐β‐gal staining cells (B). p16INK 4a and PAI‐1 mRNA levels analysed by qRT‐PCR (C, D). Telomerase activity (E). Values are expressed as mean ± SEM. (n = 3 in each group). *P < .05 vs control, # P < .05 vs H2O2 group
