Importantly, the downregulated GWAS genes in astrocytes derived from the entorhinal cortex, such as NKAIN3, LRRC4C, CADM2, DLC1, APOE, TNIK, GADD45G, FRMD4A, CTNNA2, NPAS3, NCKAP5, RORA, etc., associated with AD pathogenesis, can be used either as biomarkers for neuropathology, AD or LOAD (Riaz et al., 2021). The gene discussed is CTNNA2; the disease is Alzheimer disease.