Overexpression of DJ-1 in mesencephalic dopaminergic neurons (MN9D) and COS-7 cells reduced Annexin V and TUNEL staining and increased cell viability by MTT compared to controls following treatment with the insecticide rotenone and the prodrug to the neurotoxin MPP+, which causes permanent symptoms of Parkinson’s disease [70,72]. The gene discussed is PARK7; the disease is Parkinson disease.