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1996 ; 87
(9
): 882-6
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Prevention by 2-mercaptoethane sulfonate and N-acetylcysteine of renal oxidative
damage in rats treated with ferric nitrilotriacetate
#MMPMID8878448
Umemura T
; Hasegawa R
; Sai-Kato K
; Nishikawa A
; Furukawa F
; Toyokuni S
; Uchida K
; Inoue T
; Kurokawa Y
Jpn J Cancer Res
1996[Sep]; 87
(9
): 882-6
PMID8878448
show ga
Ferric nitrilotriacetate (Fe-NTA) is a renal toxicant and carcinogen in rats and
mice. We found that its administration results in formation of
4-hydroxy-2-nonenal (HNE) in the renal proximal tubule cells of rats, and
8-hydroxydeoxyguanosine (8-OHdG) adducts in their DNA, suggesting a role for
oxidative stress. Since 2-mercaptoethane sulfonate (MESNA) and N-acetylcysteine
(NAC), administered orally, have been shown to increase the kidney levels of free
thiol groups, their influence on the renal toxicity and carcinogenicity induced
by Fe-NTA was examined in the present study. Male Wistar rats were
intraperitoneally injected with Fe-NTA (12 mg Fe/kg), and MESNA (100 mg/kg) or
NAC (200 mg/kg) was given orally 1 h before and 1 h after this treatment. The
animals were killed for tissue analyses 3 h after the Fe-NTA exposure. In accord
with our previous reports, HNE-modified protein was detected in the proximal
tubules of Fe-NTA-treated rats by means of immunohistochemistry. Likewise, levels
of 8-OHdG in the renal nuclear DNA, lipid peroxides as thiobarbituric
acid-reactive substances in the kidneys, and blood urea nitrogen and creatinine
in the serum were significantly increased by the Fe-NTA treatment. All of these
changes were completely inhibited by oral administration of MESNA or NAC. These
results suggest that both of these compounds can prevent the oxidative stress
induced by Fe-NTA.