The lookup in the BIOS QTL browser revealed that DNAm at ABCG1 was inversely correlated with gene expression of the same gene, and this finding agrees with previous observations in blood [22, 34–36] and in primary target tissues for T2D [22], suggesting that expression of ABCG1 may be under epigenetic control. This evidence concerns the gene ABCG1 and type 2 diabetes mellitus.