Diagnosis of Metastatic Tumors on 68Ga-FAPI-RGD PET-CT and Radioligand Therapy With 177Lu-FAPI-RGD

Fibroblast activation protein (FAP) and RGD are serine peptidase on the surface of tumor associated fibroblasts. It has special biological characteristics and stable genome. They are usually not expressed or expressed at a low level in the resting tissues of normal adults, but it is highly expressed in diseases related to tissue repair and matrix reconstruction,Receptor imaging with a single target also has some limitations in clinical application. For example, not all diseased cells express a large amount of single receptor on the surface, which greatly affects the judgment of the nature of the lesion. The dual-target molecular imaging based on FAP expressed in the lesion site and integrin αvβ3 receptor highly expressed on the surface of the lesion neovascularization will overcome the above limitations and make full use of the advantages of the dual-target molecular imaging, which will greatly assist the diagnosis of malignant tumors and used to 177Lu PRRT. We'll try to assess the safety and therapeutic response to 177Lu-FAPI-RGD in patients with metastatic tumors in human.