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上皮特异性黏附分子在肿瘤中的表达研究进展

2020-09-02许华丽朱柯冯燕

中外医学研究 2020年16期

许华丽 朱柯 冯燕

【摘要】 上皮特异性黏附分子(epithelial cell adhesion molecule,Ep-CAM)一种分子量为37KDa的Ⅰ型跨膜糖蛋白,介导上皮特异性细胞间黏附,局限性表达于正常组织上皮基底膜处,相关于细胞信号传递、迁移、增殖和分化等。不少研究者在肿瘤发生机制研究中发现Ep-CAM大量表达于快速增长的上皮性或上皮源性肿瘤组织中,参与Wnt信号转导通路,与肿瘤的发生、发展、侵袭、转移及预后有着密切联系,目前已成为肿瘤早期诊断和免疫靶向治疗的候选分子。本文就Ep-CAM的生物学特性及近年来其在相关肿瘤的研究进展做一综述,期望对肿瘤的早期诊断、治疗和预后有所帮助。

【关键词】 肿瘤 Ep-CAM 肿瘤干细胞 肿瘤标记物

doi:10.14033/j.cnki.cfmr.2020.16.069 文献标识码 A 文章编号 1674-6805(2020)16-0-03

Progression of the Research of Epithelial Cell Adhesion Molecule Express in Cancer/XU Huali, ZHU Ke, FENG Yan. //Chinese and Foreign Medical Research, 2020, 18(16): -171

[Abstract] Epithelial adhesion molecule (Ep-CAM) is a type I transmembrane glycoprotein with a molecular weight of 37KDa mediates the adhesion of epithelial-specific intercellular. Ep-CAM localized express at the epithelial basement membrane of normal tissues which is associated with the signaling, migration, proliferation and differentiation of cells. Lots of researchers have found that Ep-CAM is abundantly expressed in rapidly growing epithelial or epithelial-derived tumor tissues and is involved in Wnt signal transduction pathway, which is closely related to tumorigenesis, development, invasion, metastasis and prognosis. Ep-CAM has become a candidate molecule for the early diagnosis and immuno-targeted therapy of tumor. This article mainly reviews the biological characteristics of Ep-CAM and the recent research progress of it related to tumors, and hoping to be helpful for the early diagnosis, treatment and prognosis of tumors.

[Key words] Tumor Ep-CAM TSC Tumor marker

First-authors address: Mianyang Hospital of Traditional Chinese Medicine, Mianyang 621000, China

上皮屏障功能主要由上皮细胞间的紧密连接决定,生理条件下,细胞黏附起着至关重要的作用,当上皮细胞接触相邻细胞时,将会影响细胞的遷移、增殖和分化等功能,即为接触性抑制[1]。然而在肿瘤中,接触性抑制的丧失会导致细胞不可控制的增殖和运动,进而侵犯邻近组织器官甚至远处转移[2]。细胞黏附主要由跨膜细胞黏附分子(cell adhesion molecule,CAM)介导的同种或异种细胞与细胞之间及细胞与基质之间的相互作用,参与细胞迁移,细胞周期,细胞信号及生物体发育和组织再生期间的形态,而Ep-CAM,主要以多聚体的形式广泛的表达于上皮细胞的表面,功能不仅限于细胞黏附,包括细胞迁移,增殖和分化等过程[3-4],并参与钙粘蛋白-连环蛋白及WNT信号通路密,调节Myc等原癌基因的表达[3,5-6],且因其已被证实为一种上皮性肿瘤的特异性抗原,目前已经成为肿瘤免疫治疗的一个重要靶点。……

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