DNMT1 and central nervous system cancer: The association of DNMT1 expression and low-grade gliomas compared to high-grade tumors was further validated through analysis of available gene expression data from The Cancer Genome Atlas (TCGA) (n=1161; fold=1.54; p-value=4.5E-127) (Figure 1B), whereas DNMT3A and DNMT3B were more associated with high-grade tumors (DNMT3A p-value=2.2E-16, DNMT3B p-value=2.1E-15) (Figure 1B).