MS4A4A and Alzheimer disease: AD‐associated expression profiles from the PFC region (Supporting Information Table S3A) revealed that 8 genes were differentially expressed, with MS4A4A, UBE2L3,TREM2, and HECTD4 being the most significant, while just 3 genes’ expression levels (HECTD4, YDJC, and PABPC1) were altered in the hippocampal regions compared with control brains (Supporting Information Table S3B).