PLoS ONE (Jan 2011)

Monocrotophos induced apoptosis in PC12 cells: role of xenobiotic metabolizing cytochrome P450s.

  • Mahendra Pratap Kashyap,
  • Abhishek Kumar Singh,
  • Vivek Kumar,
  • Vinay Kumar Tripathi,
  • Ritesh Kumar Srivastava,
  • Megha Agrawal,
  • Vinay Kumar Khanna,
  • Sanjay Yadav,
  • Swatantra Kumar Jain,
  • Aditya Bhushan Pant

DOI
https://doi.org/10.1371/journal.pone.0017757
Journal volume & issue
Vol. 6, no. 3
p. e17757

Abstract

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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.