In patients with Gaucher’s disease (related to glucocerebrosidase (GBA) deficiency), plasma oligomeric aSyn levels were related to leucocyte GBA activity [92], although plasma and exosomal aSyn levels were similar in patients with PD associated with GBA gene mutations, PD without GBA mutations and controls [93]. Here, GBA1 is linked to hyperinsulinemic hypoglycemia, familial, 4.