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Zinc protects renal function during cadmium intoxication in the rat.

Authors :
Jacquillet G
Barbier O
Cougnon M
Tauc M
Namorado MC
Martin D
Reyes JL
Poujeol P
Source :
American journal of physiology. Renal physiology [Am J Physiol Renal Physiol] 2006 Jan; Vol. 290 (1), pp. F127-37. Date of Electronic Publication: 2005 Jun 07.
Publication Year :
2006

Abstract

This study investigates the effect in the rat of chronic CdCl2 intoxication (500 microg Cd2+/kg, daily i.p. injection for 5 days) on renal function and the changes in tight junction proteins claudin-2, claudin-3, and claudin-5 present in rat kidney. We also studied the effect of coadministration of ZnCl2 (500 microg Zn2+/kg) during chronic CdCl2 intoxication. Our results indicate that 1) most of the filtered Cd2+ is reabsorbed within the kidney; 2) chronic Cd2+ intoxication can induce a change in renal handling of ions without altering glomerular filtration rate; 3) a delayed nephropathy, showing Fanconi-like features, appears more than 5 days after the end of CdCl2 exposure; 4) epithelial integrity is altered by chronic Cd2+ intoxication affecting the expression and localization of claudin tight junction proteins; and 5) cotreatment with Zn2+ protects against the renal toxic effects of Cd2+, preventing altered claudin expression and inhibiting apoptosis. In conclusion, these results show that Cd2+ toxicity and cellular toxic mechanisms are complex, probably affecting both membrane transporters and tight junction proteins. Finally, Zn2+ supplementation may provide a basis for future treatments.

Details

Language :
English
ISSN :
1931-857X
Volume :
290
Issue :
1
Database :
MEDLINE
Journal :
American journal of physiology. Renal physiology
Publication Type :
Academic Journal
Accession number :
15942048
Full Text :
https://doi.org/10.1152/ajprenal.00366.2004