Changes in the urinary excretion level of 8-hydroxyguanine by exposure to reactive oxygen-generating substances.

Abstract

A simple means of measuring of 8-hydroxyguanine (8-OHGua) levels in urine was developed. Rat and human urine samples were purified by means of strong cation exchange chromatography (Amberlite CG-120), followed by cellulose partition chromatography (Whatman CF-11). Thereafter, 8-OHGua was determined by means of high performance liquid chromatography (HPLC) using an electro-chemical detector. The level of 8-OHGua in rat urine increased by a factor of 2 to 4 after an intraperitoneal administration of 2-nitropropane (25 mg/kg), paraquat (11.3 mg/kg), or hydroquinone (11 mg/kg). On the other hand, the urine of smokers and persons exposed to air polluted with car exhaust also contained 1.9 and 3.8 fold more 8-OHGua, respectively, than that of control nonsmokers. These results indicated that the amount of 8-OHGua in urine is useful marker for monitoring the level of in vivo oxidative stress.

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@article{Suzuki1995ChangesIT, title={Changes in the urinary excretion level of 8-hydroxyguanine by exposure to reactive oxygen-generating substances.}, author={J. Suzuki and Yusuke Inoue and Satoshi Suzuki}, journal={Free radical biology & medicine}, year={1995}, volume={18 3}, pages={431-6} }