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Farideh Bahrami,Zahra Bahari,Reihaneh Abolghasemi,Lida Golmanesh,Gholam Hossein Meftahi 대한독성 유전단백체 학회 2020 Molecular & cellular toxicology Vol.16 No.4
Background Organophosphorus agents are potent neurotoxins that widely used as insecticides and also as poison in warfare. In the current study, we examined the neuroprotective role of NMDA receptors in Paraoxon (POX)-induced neurotoxicity of hippocampal cultured neurons. Objective Hippocampal neurons were isolated from the brains of neonatal rats. The cells treated with POX (100 µM) for 48 h or NMDA (NMDA receptor agonist, 100 µM) for 1 h or MK801 (NMDA receptor antagonist, 1 µM) for 15 min before the NMDA and POX treatment. The colorimetric MTS method was used for cell survival assay. The immunocytochemistry and scanning electron microscopy were done for the morphometric study and total neurotic length calculations. Additionally, the activity of the caspase-3 enzyme was determined. Result The present results demonstrated that POX signifcantly reduces the viability of cells, cell number, length of neurites, and also the surface area of neurons. We also show that POX increased the activity of the Caspase3 enzyme. Additionally, the application of NMDA signifcantly increased the viability of cells, cell number, and the surface area of neurons as compared with the POX group. Furthermore, pretreatment of cells with NMDA signifcantly decreased the activity of the Caspase3 enzyme as compared with the POX group. Application of MK801 signifcantly decreased cell viability, cell number, TNL, and activity of Caspase3 enzyme as compared with the control group. Conclusion The present study indicated that NMDA treatment has neuroprotective efects on hippocampal neurons following exposure to POX. It seems that these protective efects mediated by decrease the activity of caspase3. Additionally, pretreatment of cells with MK801 has toxicity efects on hippocampal neurons.