Moreover, many other genes encoding molecules that contribute to AD pathogenesis at different levels, such as STAT6, thymic stromal lymphopoietin (TSLP), IL7R, TSLPR, interferon regulatory factor 2 (IRF2), toll-like receptor 2 (TLR2), FcεRIα (FCER1A), and β-Defensin (DEFB1), have been found to been implicated in AD susceptibility in different ethnic groups [60,61,62]. Here, DEFB1 is linked to Alzheimer disease.