N-Acetylcysteine supplementation decreased brain lipid and protein oxidations produced by experimental HOMOCYSTEINE THIOLACTONE (cas 10593-85-8) exposure: Relevance to neurodegeneration

Add time:08/15/2019    Source:sciencedirect.com

High levels of homocysteine (Hcy) have neurotoxic effects. HOMOCYSTEINE THIOLACTONE (cas 10593-85-8) (HcyT), a thioester of Hcy, plays a role in Hcy-induced toxicity. In this study, effects of HcyT treatment (500 mg/kg body weight/day in drinking water) for 6 weeks on serum Hcy levels and brain prooxidant-antioxidant balance were investigated in rats. The effect of N-acetylcysteine (NAC) treatment (1 g/kg body weight/day in chow) for 6 weeks on HcyT-induced neurotoxicity was evaluated. Reactive oxygen species (ROS), thiobarbituric acid reactive substances (TBARS), diene conjugate (DC), protein carbonyl (PC) and advanced oxidation protein products (AOPP) were determined in the brain tissue. Ferric reducing antioxidant power (FRAP) and non-protein sulfydryl groups (NPSH) levels as well as superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities were also measured to evaluate the antioxidant potential of brain the tissue. HcyT elevated serum Hcy levels and brain ROS, TBARS, DC, PC and AOPP levels. However, HcyT did not affect FRAP levels and SOD, and GSH-Px activities. NAC treatment decreased serum Hcy and brain ROS, TBARS, DC, PC and AOPP levels in HCyT-treated rats. Our results indicate that NAC supplementation may be effective in decreasing serum Hcy levels and HcyT-induced oxidative stress in brain of rats.

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