SLC6A3 and Parkinson disease: Supplementation with polyphenol-rich MP extract for 8 weeks at both a low dose (LMP) or a high dose (HMP) attenuated the progression of PD in our 6-OHDA-induced PD-like rat model, as indicated by significant improvements in motor function (Figure 2A,B) and DAT binding activity in the SNc (Figure 2F).