The application relates to an application of
nilotinib or a pharmaceutically acceptable salt thereof in preparation of a radiotherapy synergistic and attenuated
drug for rectal
cancer, and belongs to the technical field of medicines.The technical problem to be solved by the application is that the existing radiotherapy combined scheme is difficult to simultaneously realize enhancement of tumor
radiosensitivity and reduction of normal intestinal
radiation injury.The new application provided by the application is that: as a ZAK alpha inhibitor, the
nilotinib weakens radiotherapy resistance, enhances
DNA damage accumulation and promotes
apoptosis in
tumor cells by inhibiting
ionizing radiation-induced ZAK alpha-mediated
ribosome toxicity stress response, and reduces
radiation-induced
apoptosis in normal intestinal epithelial cells and protects the
intestinal mucosal barrier.
In vitro and
in vivo experiments prove that the
nilotinib can effectively enhance the radiotherapy effect of
colorectal cancer and significantly relieve
radiation-induced
intestinal injury under the same administration scheme, realizes the double functions of radiotherapy "synergism" and "attenuation" of a single
drug, and has important clinical transformation value.