IDE and Alzheimer disease: There were no significant differences in the expression of IDE (p > 0.05, Figures 4G,H) or NEP (p > 0.05, Figures 4G,H) between the AD group and the AD-DHA group, although significant difference was noted in the protein expression of IDE between the WT group and the AD-DHA group (p < 0.05, Figures 4G,H).