By contrast, elevated plasmatic UCH-L1 levels have been reported in individuals suffering from PD and dementia with Lewy bodies (DLB) [115], revealing that plasmatic levels of UCH-L1 are inconclusive for AD [108], but they may be used for other neurological condition diagnosis, such as Parkinson’s disease, DLB, epilepsy, and amyotrophic lateral sclerosis (ALS) [116,117,118,119]. Here, UCHL1 is linked to Alzheimer disease.