When analyzing GluR2 Q/R-editing status in different cancer cell lines, it has been shown that some of them exclusively express the unedited form of GluR2 (SK-NA-S, neuroblastoma) or both, the edited and the unedited GluR2 forms (MOGGCCM, astrocytoma). Here, GRM2 is linked to astrocytoma (excluding glioblastoma).