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上皮间质转化在肺癌中的研究进展 被引量:1

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摘要 肺癌是全球新发病例和死亡病例均居首位的恶性肿瘤,影响患者预后的主要因素是出现局部复发及远处转移。新近研究表明,上皮间质转化(EMT)在肿瘤演进中是一个重要的决定性过程,与肿瘤细胞侵袭、转移乃至"干性"等密切相关。1 EMT概念EMT是上皮细胞失去上皮特性获得间质细胞表型的一种生物现象。EMT发生后,细胞间连接蛋白及上皮特异性蛋白表达下降,如E-钙黏蛋白(E-cad)、β-连锁蛋白等;同时伴随间充质细胞特异性蛋白表达增高,如波形蛋白(vimentin)、N-钙黏蛋白(N-cad)等。EMT在人胚胎干细胞分化过程中起着关键作用,这个过程在组织修复再生、器官纤维化和肿瘤发生时可被病理性激活嘲。肿瘤细胞是否存在EMT现象,曾一度出现争论。
出处 《检验医学与临床》 CAS 2012年第21期2726-2727,共2页 Laboratory Medicine and Clinic
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