1.Fibroblast activation protein targeting radiopharmaceuticals: From drug design to clinical translation.
Yuxuan WU ; Xingkai WANG ; Xiaona SUN ; Xin GAO ; Siqi ZHANG ; Jieting SHEN ; Hao TIAN ; Xueyao CHEN ; Hongyi HUANG ; Shuo JIANG ; Boyang ZHANG ; Yingzi ZHANG ; Minzi LU ; Hailong ZHANG ; Zhicheng SUN ; Ruping LIU ; Hong ZHANG ; Ming-Rong ZHANG ; Kuan HU ; Rui WANG
Acta Pharmaceutica Sinica B 2025;15(9):4511-4542
The activation proteins released by fibroblasts in the tumor microenvironment regulate tumor growth, migration, and treatment response, thereby influencing tumor progression and therapeutic outcomes. Owing to the proliferation and metastasis of tumors, fibroblast activation protein (FAP) is typically highly expressed in the tumor stroma, whereas it is nearly absent in adult normal tissues and benign lesions, making it an attractive target for precision medicine. Radiolabeled agents targeting FAP have the potential for targeted cancer diagnosis and therapy. This comprehensive review aims to describe the evolution of FAPI-based radiopharmaceuticals and their structural optimization. Within its scope, this review summarizes the advances in the use of radiolabeled small molecule inhibitors for tumor imaging and therapy as well as the modification strategies for FAPIs, combined with insights from structure-activity relationships and clinical studies, providing a valuable perspective for radiopharmaceutical clinical development and application.
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