[Urinary excretion kinetics of enzymes and proteins in the application of therapeutic doses of gentamycin].

9 patients with chronic pyelonephritis were given gentamicin intramuscularly in an appropriate dosage for a period of 10 days. The urinary excretion of cells, protein, alanine aminopeptidase (EC 3.4.11.2),N-acetylglucosaminidase(EC 3.2.1.30) and alpha-galactosidase (EC 3.2.1.23) was determined daily. The most striking enzyme increase occurred in alanine aminopeptidase. The enzyme and protein output appears to be rhythmic and discontinuous. A 2--3-day rhythm is suggested. Rhythmic alterations of the digestion activity of the lysosomes are assumed to be the cause of these changes.