No significant differences were detected between HC and either DLB or AD in nAChRα7 gene expression (DLB vs HC (median = 0.6 (IQR 0.2–0.8); AD vs HC (median = 0.3 (IQR 0.2–0.6); AD vs DLB (p = 0.454)) (Fig. 2a). This evidence concerns the gene CHRNA7 and Lewy body dementia.