Association of SNCA variants with α-synuclein of gastric and colonic mucosa in Parkinson's disease.

•Determining factors for alpha-synuclein (α-Syn) deposition in the enteric nervous system (ENS) of humans are still unclear.•SNCA rs11931074 (G allele) is associated with α-Syn immunostaining in the ENS in patients with Parkinson's disease (PD).•α-Syn deposition in the ENS may be associated with SNCA variants in patients with PD.