MS4A6A and glioblastoma: Using the MEXPRESS database, we detected six CpG sites (cg20284999, cg24026212, cg06881914, cg04353769, cg00673646, and cg03055440) in the DNA promoter regions of MS4A6A correlating negatively with MS4A6A expression in LGG tissues and that promoter methylation of cg03055440 had a negative effect on MS4A6A expression in GBM tissues (Figures 2A, B).