Injurious effect of buthionine sulfoximine, an inhibitor of glutathione biosynthesis, on the lethality and urotoxicity of cyclophosphamide in mice.

Abstract
The effect of buthionine sulfoximine (BSO), a glutathione biosynthesis inhibitor, on the acute lethal toxicity and urotoxicity induced by cyclophosphamide (CPA) was examined in mice. Pretreatment of mice with BSO (500 mg/kg, i.p.) 5 hr prior to CPA resulted in enhanced lethality and urotoxicity of CPA. In contrast, administration of cysteamine decreased the lethality and urotoxicity of CPA.
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