Observations on calcium oxalate stone formers.

Biochemical studies were performed on 22 adult patients with idiopathic recurrent calcium oxalate renal stone disease and 23 healthy controls. It was found that urinary glutamic-oxaloacetic acid transaminase (UGOT) and urinary glutamic-pyruvic acid transaminase (UGPT) activity was low and lactate dehydrogenase (LDH) and gamma-glutamyl transferase (gamma-GT) activity was high in the urine of calcium oxalate stone formers. No significant changes were observed in the activity of glutamic-oxaloacetic acid transaminase, glutamic-pyruvic acid transaminase and gamma-GT in their blood but a significant reduction was found in both LDH and alkaline phosphatase activity. It was concluded that the activity of UGOT and UGPT is reduced in patients with kidney stones.