Abstract
Appropriate experimental conditions for the estimation of hydroxyl radical generation by salicylate hydroxylation were determined for multiple organs of X-irradiated mice in vivo. The in vitro experiments showed that there were significant correlations between the salicylic acid (SA) concentration, the amount of 2,3-dihydroxy benzoic acid (2,3-DHBA) and the X-ray exposure dose, and we obtained two linear-regression equations to calculate the amounts of hydroxyl radicals generated by the X-irradiation. The optimum dosage of SA and the appropriate sampling time for in vivo experiments was determined, and significant increases in the ratio of 2,3-DHBA to SA were detected in several organs of mice after X-irradiation. The hydroxyl radical equivalents of the 2,3-DHBA increases were also calculated. Our results clearly demonstrated the usefulness of the salicylate hydroxylation method in estimating hydroxyl radical generation in multiple organs in vivo.
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