成纤维细胞激活蛋白α(Fibroblast activation proteinα,FAPα)是一种跨膜丝氨酸蛋白酶,高度表达在90%的上皮性肿瘤的间质--肿瘤相关成纤维细胞(Tumor association fibroblast,TAF)上。FAPα在促进上皮性肿瘤的恶性进展中起着十分重要的作用,近年来研究发现,FAPα在肿瘤微环境中发挥免疫抑制的作用。研究FAPα在肿瘤免疫抑制中的作用,已成为肿瘤研究的新的热点。为基于以FAPα为靶标的抗肿瘤免疫治疗提供参考,本文围绕引起肿瘤免疫抑制的因素、FAPα与肿瘤免疫抑制的研究进展以及FAPα在肿瘤的发展进程的作用作一综述。 Fibroblast activation protein α (FAPα) is a transmembrane serine protease that is highly expressed on Tumor-associated fibroblasts (TAF) in 90% of epithelial tumors. FAPα plays a very important role in promoting malignant progression of epithelial tumors. In recent years, FAPα has been shown to play an immunosuppressive role in the tumor microenvironment. Studying the role of FAPα in tumor immunosuppression has become a new focus of cancer research. In this review, we focus on the factors that cause tumor immunosuppression, the research progress of FAPα and tumor immunosuppression and the role of FAPα in tumor progression.