TRPM7 and malignant glioma: A large number of breast, lung, pancreatic, prostate, gastric, and head and neck cancers and malignant gliomas express high TRPM7 levels (Jiang et al., 2007; Kim et al., 2008; Guilbert et al., 2009; Rybarczyk et al., 2012; Sun et al., 2014; Alptekin et al., 2015; Chen et al., 2016).