KCNH1 and glioblastoma: As shown in Fig. 1, hERG and Eag1 channels are expressed to a similar extent in four glioblastoma cell lines (A172, U87, U251, U373) and primary glioblastoma cells, determined by both immunocytochemistry (Fig. 1a) and Western blotting (Fig. 1b and Suppl.