ERBB2 and oligodendroglioma: We demonstrate that GTA induces cytostatic growth arrest of primary tumor-derived oligodendroglioma cells (grade II OG33 and grade III OG35) that possess some features (i.e., self-renewal and the formation of aggressive orthotopic tumors) of OG cells more than established human oligodendroglioma cells (HOG and Hs683), but has little to no effect on normal cells (i.e., NSCs and a murine OPC line, Oli-Neu).