Effect of Crataeva nurvala in experimental urolithiasis.

The effect of oral administration of Crataeva nurvala bark decoction on calcium oxalate lithiasis has been studied in rats. The elevation of the oxalate-synthesizing liver enzyme, glycolate oxidase, produced by feeding glycollic acid was remarkably reduced with the decoction, showing a regulatory action on endogenous oxalate synthesis. Protein-bound carbohydrates were increased in the renal tissues during calculosis but these changes were not reversed with the herbal treatment. The increased deposition of stone-forming constituents in the kidneys of calculogenic rats was lowered with decoction administration. The increased urinary excretion of the crystalline constituents along with lowered magnesium excretion found in stone-forming rats was partially reversed by decoction treatment.