Figure 8.
Effect of CSE (A), TH (B), CAF (C) and PCA (D) on superoxide anion levels in iliac arteries from aged male rats. Data show % of DHE-positive cells in the adventitial layer incubated with Krebs Henseleit Solution (KHS) or 10−4 M of each compound. Bar graphs represent the mean ± SEM of 4 segments from 4–5 different rats per group. Data were analyzed by Student’s t test; * p-value < 0.05. DHE, dihydroethidium; CSE, cocoa shell extract, TH, theobromine; CAF, caffeine; PCA, protocatechuic acid.