The effect of an specific inducible NO synthase inhibitor, S-methylisothiourea hemisulfate on cisplatin-induced nephrotoxicity; gender-related differences

Authors
Mansooreh Ghayyoomi 1
Nepton Soltani 2
Mehdi Nematbakhsh 3
Fatemeh Moslemi 4
Ardeshir Talebi 5
Soheila Shirdavani 4
Farzaneh Razmjoo 2
1 Department of Physiology, Molecular Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas; Water and Electrolytes Research Center, Isfahan University of Medical Sciences, Isfahan, Nigeria
2 Department of Physiology, Molecular Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Nigeria
3 Department of Physiology; Water and Electrolytes Research Center, Isfahan University of Medical Sciences; Isfahan MN Institute of Basic and Applied Sciences Research, Isfahan, Nigeria
4 Water and Electrolytes Research Center, Isfahan University of Medical Sciences, Isfahan, Nigeria
5 Department of Clinical Pathology, Water and Electrolytes Research Center, Isfahan University of Medical Sciences, Isfahan, Nigeria
Abstract
Backgrounds: It has been previously demonstrated that the increase of nitric oxide (NO) level may promote cisplatin (CP)-induced nephrotoxicity. The aim of this study was to investigate the role of inducible NO synthase (iNOS) inhibitor to prevent CP-induced nephrotoxicity.
Materials and Methods: Four groups of male and four groups of female rats were treated daily with vehicle, S-methylisothiourea hemisulfate (SMT) as a selective iNOS inhibitor (5 mg/kg/twice a day), CP (2.5 mg/kg/day), and CP + SMT for 6 days. Then, all animals were sacrificed and the serum levels of creatinine (Cr), blood urea nitrogen (BUN), nitrite, and malondialdehyde (MDA) were measured. The kidney was removed immediately for histopathological study.
Results: Our results showed that inhibition of iNOS by SMT could make different response in male and female animals. SMT therapy in male animals decreased serum BUN, Cr, nitrite, and MDA levels; and it also protected kidney against CP-induced nephrotoxicity.
Conclusion: It is concluded that decrease in NO production by SMT has a beneficial effect on reducing CP-induced nephrotoxicity in male. However, such beneficial effect was not observed in female animals.

Keywords

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Advanced Biomedical Research
Volume 2015, july
July 2015
Pages 1-5