Fig. 4From: Engrailed 2 (EN2) acts as a glioma suppressor by inhibiting tumor proliferation/invasion and enhancing sensitivity to temozolomideEN2 sensitizes glioma cells to temozolomide. a and b EN2 overexpression alone does not dramatically induce early apoptosis in U251 cells (n = 8). c and d EN2 overexpression promotes cell apoptosis after treatment of rotenone or temozolomide (n = 6). Scale bar, 20 μmBack to article page