SNCA and Parkinson disease: While the most common form of PD is sporadic, mutations in SNCA and LRRK2 genes have been linked to autosomal-dominant forms of inheritance whereas mutations in Parkin, PINK1, DJ-1, and ATP13A2 genes have been associated with autosomal-recessive forms of inheritance (Lashuel et al., 2013; Bridi and Hirth, 2018; Larsen et al., 2018; Price et al., 2018).