Monocrotophos (MCP) is a widely used organophosphate (OP) pesticide. We studied apoptotic changes and their correlation with expression of selected cytochrome P450s (CYPs) in PC12 cells exposed to MCP. A significant induction in reactive oxygen species (ROS) and decrease in glutathione (GSH) levels were observed in cells exposed to MCP. Following the exposure of PC12 cells to MCP (10 -5 M), the levels of protein and mRNA expressions of caspase-3/9, Bax, Bcl 2 , P 53 , P 21 , GSTP1-1 were significantly upregulated, whereas the levels of Bclw, Mcl1 were downregulated. A significant induction in the expression of CYP1A1/1A2, 2B1/2B2, 2E1 was also observed in PC12 cells exposed to MCP (10 -5 M), whereas induction of CYPs was insignificant in cells exposed to 10 -6 M concentration of MCP. We believe that this is the first report showing altered expressions of selected CYPs in MCP-induced apoptosis in PC12 cells. These apoptotic changes were mitochondria mediated and regulated by caspase cascade. Our data confirm the involvement of specific CYPs in MCP-induced apoptosis in PC12 cells and also identifies possible cellular and molecular mechanisms of organophosphate pesticide-induced apoptosis in neuronal cells. © 2011 Kashyap et al.
Kashyap, M. P., Singh, A. K., Kumar, V., Tripathi, V. K., Srivastava, R. K., Agrawal, M., … Pant, A. B. (2011). Monocrotophos induced apoptosis in PC12 cells: Role of xenobiotic metabolizing cytochrome P450S. PLoS ONE, 6(3). https://doi.org/10.1371/journal.pone.0017757