Figure 6. Effect of SkQ1 on the angiogenesis. (a) CD31 immunostaining of wound area tissue at 7d and 13d. (b) Vessel density in CD31 stained sections of old mice. Data are presented as mean ± SD;*P < 0.05 for SkQ1-treated versus control; ‡P < 0.05 for the untreated young versus old mice.