FFAR3 and Parkinson disease: We obtained 11 potential candidates (Table 1): LSMEM1, KCNH4, RNF152, CD300LB, AIG1, APOL1, ABCD2, CELSR2, LMO7, ABCC3 and FFAR3. Five (LSMEM1, AIG1, APOL1, ABCD2, and CELSR2) were upregulated in PD, while the remaining genes were downregulated in PD.