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Toxicol Lett. 1988 Feb;40(2):175-82.

Circadian variations in the renal toxicity of gentamicin in rats.

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  • 1Institut d'Etudes des M├ędicaments, U.E.R. de M├ędecine et de Pharmacie, Poitiers, France.

Abstract

The hypothesis that sublethal doses of aminoglycosides cause renal tubule disorders resulting in changes of urine enzyme levels was investigated. The renal status following injection of a single sublethal dose of gentamicin (200 mg/kg) at different times during a 24 h cycle was studied. Increased excretion of gamma-glutamyl transferase, alanine aminopeptidase and N-acetyl-beta-D-glucosaminidase, used clinically as markers for tubule toxicity of aminoglycosides, was maximal when gentamicin was administered to rats at 2 p.m. and was minimal when injected at 8 p.m. These significant differences in enzyme excretion as a function of injection time are correlated with the concentration of gentamicin in the urine and in the renal cortex.

PMID:
2893472
[PubMed - indexed for MEDLINE]

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