SLC18A2 and Parkinson disease: Regarding the role of VMAT2 in packing cytosolic dopamine into synaptic vesicles to prevent its autoxidation and the subsequent degeneration of dopamine neurons; Spearman analyses reveal significant negative correlations between 8‐oxo‐dG levels and VMAT2 density in the caudate (rs = −0.451, p = 0.027) and putamen (rs = −0.516, p = 0.024) of AD brains, as well as in the caudate (rs = −0.683, p = 0.042) of PD brains (Fig. 4c).