NOS2 and Alzheimer disease: EA at DU24 and DU20 reduced the iNOS-Iba1 colocalization in all areas (55.36% in the PtA, P < 0.01, Figure 6(e); 32.94% in the Ent, P < 0.05, Figure 6(f)) and the IL-β-Iba1 colocalization in the Ent (45.62%, P < 0.05, Figure 6(h)) compared with AD mice.