The role of genetic factors in PD is receiving more attention, and dozens of genes have been found to be related to the incidence of PD, including SNCA, LRRK2, and so on (Manto and Marmolino, 2009; Deng et al., 2018; Poujois and Woimant, 2018). The gene discussed is LRRK2; the disease is Parkinson disease.