Combined with the previous research that wild type DJ‐1 transfected SH‐SY5Y cells was successfully established in our laboratory (Zhang, Wang, & Pu, 2007), we suggest that H2O2 induced L166P DJ‐1‐transfected SH‐SY5Y cells are a useful new cellular model of PD. The gene discussed is PARK7; the disease is Parkinson disease.