N-acetylcysteine ameliorates monocrotophos exposure-induced mitochondrial dysfunctions in rat liver.

Background: Monocrotophos (MCP) is an organophosphate pesticide with well-known toxicity in mammals. Exposure of MCP is associated with altered molecular physiology at sub-cellular levels. This study investigated the efficacy of N -acetylcysteine (NAC) against MCP exposure mediated mitochondrial dysfunctions in hepatic tissue of rats. Methods: Male Wistar rats were given NAC (200 mg/kg b.wt), MCP (0.9 mg/kg b.wt) and NAC together with MCP, intragastrically for 28 consecutive days. Mitochondrial complexes activities were evaluated using biochemical analysis. mRNA expression of mitochondrial complexes subunits, PGC-1α and its downstream regulators were analyzed using polymerase chain reaction. Results: Exposure of MCP (0.9 mg/kg b.wt, intragastrically, 28 d) decreased mitochondrial complexes activities and gene expression of complexes subunits. The expression of PGC-1α, NRF-1, NRF-2, and Tfam was also reduced significantly. The administration of NAC (200 mg/kg b.wt, intragastrically, 28 d) significantly increased mitochondrial complexes activities and gene expression of complexes subunits. Additionally, NAC also maintained mitochondrial functions, and enhanced the gene expression of PGC-1α and its downstream regulators. Conclusion: The results of this study indicate that NAC prevents hepatic mitochondrial dysfunctions and maintains PGC-1α signaling. In conclusion, NAC might be speculated as a therapeutic agent for mitochondrial dysfunctions following toxic exposures.