Figure 8. APG and TRAIL combined therapy induces necrosis of tumor and promotes tumor cell apoptosis.
(a) Determination of tumor necrosis and apoptosis after combined treatment with APG and TRAIL. Tumor necrosis areas are shown by H&E staining and observed under light microscope (×100). The viable tumor cells are indicated by a blue arrow. TUNEL assay was used to detect apoptotic cells (original magnification, ×200). Positive cells for TUNEL staining are indicated by a green arrow. (b) Quota of tumor necrosis and apoptosis. Tumor necrosis was determined by software Image J. Two sections/mouse and three mice were prepared (mean ± SD, *P < 0.05, **p < 0.01). The ratio of apoptotic cells to total cells: TUNEL positive cells were counted from three fields of the highest density of positive-stained cells in each section to determine the percentage of apoptotic cells (mean ± SD, *p < 0.05, **p < 0.01).