Figure 4. Simvastatin promotes senescence markers of cellular senescence in human dermal fibroblasts incubated with different doses of simvastatin for 72 h. Beta-galactosidase positive cells (A). p16 mRNA expression (B); western blot analysis of p16 (C, D). Significance difference vs 0 nM + p<0.05, ++ p<0.01, +++ p<0.001, ++++ p<0.0001.