PMID: 12774885May 31, 2003Paper

Acute lead exposure induces renal haeme oxygenase-1 and decreases urinary Na+ excretion

Human & Experimental Toxicology
Hilda VargasBruno Escalante

Abstract

The effects of acute lead exposure on renal function, lipid peroxidation and the expression of haeme oxygenase (HO) in rat kidney were determined. A single injection of lead acetate (50 mg Pb/kg) was given to rats. Changes in renal function, characterized by a significant reduction in the Na+ excretion was observed six hours after Pb exposure; this effect persisted for 24 hours. TBARS levels increased in kidney cortex 24 hours after Pb administration. In kidney cortex, Pb exposure affected the expression of HO-1, a renal protein associated with oxidative stress. HO-1 mRNA increased 2.3-fold, three hours after Pb administration and remained increased for six, 12 and 24 hours. HO enzymatic activity and HO-1 protein increased six and three hours after Pb administration, respectively, and remained increased at 24 hours. HO inhibition by tin-protoporphyrin, potentiated Pb-induced increase in TBARS and prevented the Pb-induced reduction in Na+ excretion. Our data suggest that Pb may be acting through the generation of oxidant products and induction of HO.

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Citations

Jun 1, 2011·Analytical and Bioanalytical Chemistry·Silvia DiabatéCarsten Weiss
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