[Urinary enzymes in the early detection of rejection reactions after renal transplantation (author's transl)].

Urinary enzymes were studied in 15 patients subjected to kidney transplantation. The investigation was initiated immediately after operation and was continued for a period of between 2 and 8 weeks. There was a significant increase in urinary MDH activity in 94.2% of cases, of LDH activity in 95,65% and of gamma-GT activity in 95,17% of the cases. This detected increase in urinary enzyme activities preceded the clinical diagnosis of rejection by activities preceded the clinical diagnosis of rejection by at least 24 hours. Determination of these enzymes provides a reliable tool for the early detection of rejection crises.