FGF20 and Parkinson disease: miRNAs can also influence the SNCA accumulation by affecting the FGF20 synthesis; indeed, the rs12720208 polymorphism in the 3′UTR of FGF20 disrupts the binding site for miR-433, increasing the translation of FGF20: this determines a higher SNCA expression both in cell-based system and PD brains [79].