谷胱甘肽和牛磺酸对大鼠汞急性氧化损伤的影响

目的探讨谷胱甘肽(GSH)和牛磺酸对汞急性氧化损伤的影响。方法将32只Wistar大鼠随机分为对照、HgC12、GSH HgC12和牛磺酸 HgC124组。对照组皮下注射0．9％的生理盐水，HgC12组皮下注射2．5mg／kg体重的HgC12溶液。GSH HgC12和牛磺酸 HgC12组于注射相同剂量HgC12前2h分别腹腔注射3mmoL／kg体重的GSH溶液和4mmoL／kg体重的牛磺酸溶液。测定尿肌酐、尿汞含量和肝与肾GSH、丙二醛(MDA)、汞含量及谷胱甘肽过氧化物酶(GSH-Px)活力。结果与对照组比较，HgCl2组尿汞、肝汞、肾汞、肾MDA的含量和肾GSH-Px活力明显增加。预先给予GSH和牛磺酸，可使汞染毒大鼠。肾MDA含量均较HgCl2染毒组显著减低；肾GSH-Px活力既显著高于对照组，也显著高于HgCl2组。GSH组尿汞、肝汞显著低于HgCl2组。结论GSH和牛磺酸对汞致急性。肾氧化损伤有一定的保护作用。

Study on Antagonism of GSH and Taurine to Acute Oxidative Damage Induced by Mercury

Objective To study the antagonism of glutathione(GSH) and taurine on acute oxidative damage caused by mercury(Hg). Methods 32 Wistar rats were randomly divided into four groups. The rats of control group were given 0.9% saline by subcutaneous injections. The rats in mercuric chloride (HgCl2) group were subcutaneously injected with 2.5 mg/kg HgCl2. Rats of the other two groups were pretreated with 3 mmol/kg GSH and 4 mmol/kg taurine, respectively and two hours later injected subcutaneously with 2.5 mg/kg HgCl2. Urine creatine and mercury contents were determined; mercury level, contents of GSH, MDA and GSH-Px in liver and kidney were evaluated. Results Compared with the control, urine mercury level, level of mercury in liver and in the renal cortex, contents of GSH, MDA and GSH-Px in kidney in the group treated with 2.5 mg/kg HgCl2 were significantly increased. In the rats pretreated with GSH and taurine, contents of MDA in kidney were significantly decreased compared with those treated with mercury only. The levels of GSH-Px in kidney in the group pretreated with GSH and taurine were significantly higher than that not only in the mercury group but also in the control. Compared with the mercury group, levels of mercury in urine and liver in GSH pretreated group were distinctly reduced. Conclusion Pretreated with GSH and taurine have certain protection for the acute oxidative damage caused by mercury.