Fig. 4: POLE2 knockdown suppresses GBM growth in vivo.

A In vivo imaging was performed to evaluate the tumor burden in mice of shPOLE2 and shCtrl groups post tumor-inoculation B–C U87 cells with or without POLE2 knockdown, the volume (B) and weight (C) of tumors formed in mice was measured and calculated at indicated time intervals. D photo of the removed tumors was taken post tumor-inoculation. E The Ki67 level in tumors removed from mice was detected by IHC as a representation of tumor growth. Data were shown as mean ± SD. *P < 0.05, **P < 0.01.