For instance, LRRK2 mutations are associated with Parkinsonism, ALS and dementia (Wszolek et al., 1997; Zimprich et al., 2004), leading to mitochondrial fragmentation, mitochondrial dysfunction and increased reactive oxygen species (Whittle et al., 2007; Wang et al., 2012). This evidence concerns the gene LRRK2 and Parkinson disease.