Moreover, in the same study the down-regulation of the protein ubiquitination pathway-related genes UBE3A, USP47, and PSMD4, or even of the ATP-binding cassette family genes ABCA7 and ABCA13 in DLB-derived EVs, further suggested their use as potential diagnostic biomarkers for DLB [124] (Table 1). Here, PSMD4 is linked to Lewy body dementia.