Pretreatment with Gemcitabine/5-Fluorouracil Enhances the Cytotoxicity of Trastuzumab to HER2-Negative Human Gallbladder Cancer Cells In Vitro and In Vivo

Figure 4

Cell apoptosis of tumor tissues in the xenograft mouse model by TUNEL assay (magnification of ×200). There were statistic differences between groups, except for the groups with the same mark, such as or #. Apoptosis rate of GH group or FH group was higher than those of other groups (P < 0.05).