In a previous work, we found higher serum NAb levels against recombinant Abeta1–42, Asyn, myelin basic protein (MBP), myelin oligodendrocyte glycoprotein (MOG), and S100 calcium binding protein B (S100B) in 13 demented PD patients as well as in 14 patients with dementia with Lewy bodies (DLB), compared to 33 patients with other dementias and 31 controls [13]. This evidence concerns the gene MBP and Parkinson disease.