Effects of the SOD in endothelium-intact aortic segments from both untreated and lead-treated rats (A).

<p>Effects of the superoxide anion scavenger, SOD (150 U/ml), on the concentration-response curves of phenylephrine in endothelium-intact aortic segments from both untreated and lead-treated rats. The graph demonstrates differences in the areas under the concentration-response curves (dAUC) between the groups. Densitometry of SOD Western blots in aortas from untreated and lead-treated rats (B). Representative blots are also shown. Each point represents the mean ± SEM. *p <0.05 versus the corresponding control by Student’s t-test. The number of animals used is indicated in parentheses.