

摘要 T細胞免疫球蛋白黏蛋白3(TIM?3)是一種新發現的抑制性免疫檢查點受體分子,廣泛表達于免疫細胞表面,在機體先天性和適應性抗腫瘤免疫中發揮關鍵的抑制作用。TIM?3能夠表達于腫瘤細胞表面,直接促進腫瘤發生和進展。TIM?3通過作用于腫瘤微環境中的多種細胞、促進腫瘤抑制性微環境形成,與結直腸癌的發生、轉移、預后和治療密切相關。TIM?3能夠作為結直腸癌預后判斷和免疫治療的分子靶點,提升免疫治療在結直腸癌中的應用價值。本文就TIM?3在結直腸癌微環境中的表達和可能作用機制及其與結直腸癌預后和治療的關系作一綜述。
關鍵詞 T細胞免疫球蛋白黏蛋白3; 結直腸腫瘤; 配體; T淋巴細胞; 巨噬細胞; 樹突細胞; 免疫療法
Research Progress of Role and Mechanism of TIM?3 in Colorectal Cancer DAI Mengnan1," ZHU Yingwei2, LU Jian2, ZHANG Lili2, TANG Hong3." 1Nanjing Medical University, Nanjing (211166); 2Department of Gastroenterology, 3Department of Pathology, Affiliated Wuxi No. 2 People′s Hospital of Nanjing Medical University, Wuxi, Jiangsu Province
Correspondence to: ZHU Yingwei, Email: zhuyingw2020@163.com
Abstract T cell immunoglobulin and mucin domain?containing protein 3 (TIM?3) is a newly discovered inhibitory immune checkpoint receptor molecule that is widely expressed on the surface of immune cells and plays a vital inhibitory role in both innate and adaptive anti?tumor immunity. TIM?3 can be expressed on the surface of tumor cells, directly facilitating the occurrence and progression of tumor. TIM?3 is closely related to the occurrence, metastasis, prognosis and treatment of colorectal cancer by acting on various cells in the tumor microenvironment and promoting the formation of tumor?suppressive microenvironment. TIM?3 can serve as a molecular target for prognosis and immunotherapy of colorectal cancer, enhancing the application value of immunotherapy in colorectal cancer. This article reviewed the expression and potential mechanism of TIM?3 in the tumor microenvironment of colorectal cancer and its correlation with the prognosis and treatment of colorectal cancer.
Key words T Cell Immunoglobulin and Mucin Domain?Containing Protein 3; Colorectal Neoplasms; Ligands;
T?Lymphocytes; Macrophages; Dendritic Cells; Immunotherapy
結直腸癌是全球惡性腫瘤發病率和死亡率分別位居第三和第二位的疾病[1],近一半的患者會發生肝轉移,已成為其死亡的主要原因[2]。與直接殺傷腫瘤細胞的傳統治療方法相比,免疫治療通過提升機體自身的抗腫瘤免疫力,成為了腫瘤治療最有希望的方法之一。2017年,美國食品和藥品管理局批準程序性死亡受體?1(PD?1)抑制劑納武利尤單抗和派姆單抗用于轉移性微衛星不穩定性結直腸癌的治療,這開啟了結直腸癌免疫治療的新時代。然而由于腫瘤與機體的復雜作用所導致的先天性免疫耐受和獲得性免疫耐受的存在,現有的免疫檢查點抑制劑在結直腸癌中僅取得了有限的治療成果[3]。約85%的結直腸癌分子亞型為微衛星穩定性,由于其腫瘤突變負荷低、缺少免疫原性等特征導致對PD?1抑制劑治療無反應,且在治療有效的患者中近一半又會產生耐藥[4]。……