In a GWAS of 48,844 SNPs residing in miRNA-binding site variants, 32 SNPs were associated with PD that were located in the 3′ untranslated regions of 13 genes including HSD3B7 (Ghanbari et al., 2016), providing further genetic evidence for a role of bile acids in PD. The gene discussed is HSD3B7; the disease is Parkinson disease.