Potential role of intratumor bacteria in mediating tumor resistance to the chemotherapeutic drug gemcitabine A subcutaneous model of colon carcinoma(MC-26 cells)was Immunohistochemistry of a human established in immunocompetent BALB/c mice.Bacteria expressing PDAC tumor using an antibacterial luciferase were injected intravenously LPS antibody.Arrows point to LPS and selectively detected in the tumors staining in the tumor tissue with IVIS. 3Potential role of intratumor bacteria in mediating tumor resistance to the chemotherapeutic drug gemcitabine 3 Immunohistochemistry of a human PDAC tumor using an antibacterial LPS antibody. Arrows point to LPS staining in the tumor tissue A subcutaneous model of colon carcinoma (MC-26 cells) was established in immunocompetent BALB/c mice. Bacteria expressing luciferase were injected intravenously and selectively detected in the tumors with IVIS