Vitamin E, Vitamin C, or Losartan Is Not Nephroprotectant against Cisplatin-Induced Nephrotoxicity in Presence of Estrogen in Ovariectomized Rat Model.
Background. The nephroprotective effect of vitamins E and C or losartan against cisplatin (CP)- induced nephrotoxicity when they are accompanied by estrogen was investigated. Methods. The ovariectomized rats received estradiol valerate for two weeks. At the end of the first week, a single dose of CP (7 mg/kg, IP) was also administered, and they received placebo (group 1), vitamin E (group 2), vitamin C (group 3), or losartan (group 4) every day during the second week, and they were compared with another three control groups. Results. CP alone increased the serum levels of blood urea nitrogen (BUN), creatinine (Cr), and kidney tissue damage score (KTDS), significantly (P < 0.05), however at the presence of estradiol and CP, vitamin C, vitamin E, or losartan not only did not decrease these parameters, but also increased them significantly (P < 0.05). The serum level of superoxidase dismutase (SOD) was reduced by CP (P < 0.05), but it was increased when estradiol or estradiol plus vitamin C or losartan were added (P < 0.05). Conclusion. The particular pharmacological dose of estrogen used in this study abolish the nephroprotective effects vitamins C and E or losartan against CP-induced nephrotoxicity.
Water and Electrolytes Research Center, Isfahan University of Medical Sciences, HezarJerib Avenue, Isfahan 81745, Iran ; Department of Physiology, Isfahan University of Medical Sciences, HezarJerib Avenue, Isfahan 81745, Iran ; Kidney Diseases Research Center, Isfahan University of Medical Sciences, HezarJerib Avenue, Isfahan 81745, Iran.
Mehdi
M
Nematbakhsh
Zahra
Z
Pezeshki
Fatemeh
F
Eshraghi-Jazi
Farzaneh
F
Ashrafi
Hamid
H
Nasri
Ardeshir
A
Talebi
Tahereh
T
Safari
Maryam
M
Haghighi
Azam
A
Mansouri