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Effect of a urinary preparation on liver injury by short-term carbon tetrachloride treatment in rats.

The hepatoprotective effect of a preparation of human urine (PHU) was assessed against short-term carbon tetrachloride (CCl4) treatment in rats. Significant prevention of liver injury by PHU was found after CCl4 treatment, judging by the changes of serum biochemical parameters, and hepatic protein and triglyceride contents. The increased liver lipid peroxidation, and decreased liver vitamin C concentrations observed after CCl4 treatment were significantly prevented by PHU administration. The increase in liver glutathione (GSH) contents observed after CCl4 treatment was further increased by PHU treatment. Liver catalase activity decreased after CCl4 treatment, while liver superoxide dismutase and GSH-peroxidase activities did not change. PHU administration further inhibited the decrease in liver catalase activity after CCl4 treatment. These results indicate that PHU administration can prevent liver injury induced by CCl4 in rats by inhibiting enhanced lipid peroxidation and by improving disrupted active oxygen metabolism in the injured liver.