The neuronal model was retinoic-acid-stimulated SH-SY5Y neuroblastoma cells. Trichorfon downregulated the axonal-growth associated protein GAP-43. Trichorfon downregulated synaptic proteins (synapsin I and synaptophysin). Trichorfon downregulated the axonal cytoskeletal protein NF-200. Mipafox (neuropathic) and Paraoxon (non-neuropathic) had distinct effects on these proteins.