WNT6 and glioma: In contrast, our findings demonstrated that DNA methylation, a critical epigenetic mechanism, associates with WNT6 expression levels in glioma (Figs 2, S2 and S3), similarly to what was observed for other WNT ligands in other cancer types (Carmona et al., 2013; Jung et al., 2015; Kim et al., 2015a; Liu et al., 2016; Xu et al., 2005).