APOA1 and glioblastoma: To this end, we analyzed the gene expression of APOA1 and ABCA1/G1 (Fig. 3a), which are the main receptors of ApoA1 for cholesterol efflux, in GBM and normal brain tissue samples from the Gene Expression Profiling Interactive Analysis (GEPIA) database (http://gepia.cancer-pku.cn/).