Lin28与肿瘤关系的研究进展
2017-03-18彭加祺欧阳晓晖苏秀兰
彭加祺++欧阳晓晖++苏秀兰


[摘要] Lin28在结构上是一种高度保守的RNA结合蛋白,其在胚胎干细胞内大量表达,可以促进细胞快速增殖。同时Lin28在多种肿瘤组织或肿瘤细胞系中高表达,可以促进肿瘤细胞的增殖、肿瘤细胞的转移以及肿瘤细胞的耐药,与患者的预后不良有关。在机体内,Lin28的异常表达常常反映了机体的异常状态,包括炎症或肿瘤的发生。目前阐明细胞癌变机制、演进与预防治疗方向是研究的热点,而Lin28将成为新的分子指标。
[关键词] Lin28;miRNA;Let-7;肿瘤
[中图分类号] R733 [文献标识码] A [文章编号] 1673-7210(2017)01(b)-0033-04
Research progress of the relationship between Lin28 and tumor
PENG Jiaqi1,2 OUYANG Xiaohui1 SU Xiulan1
1.Clinical Medical Research Center, the Affiliated Hospital of Inner Mongolia Medical University, Inner Mongolia Autonomous Region, Huhhot 010050, China; 2.Graduate School, Inner Mongolia Medical University, Inner Mongolia Autonomous Region, Huhhot 010110, China
[Abstract] Lin28 is a highly conserved RNA binding protein structure. It can promote the rapid growth of embryonic stem cells and more expression in stem cells. It plays an important role in the growth and development of the body, such as the development of tumors. Lin28 is highly expressed in a variety of tumor tissues or tumor cell lines, which can promote the proliferation of tumor cells and tumor metastasis, which is associated with poor prognosis of patients. In the body, the abnormal expression of Lin28 often reflects the abnormal state of the body including inflammation or tumor. Now the direction to clarify cell canceration and evolution mechanism and prevention treatment is a hotspot of research. Lin28 will become the new molecular marker.
[Key words] Lin28; miRNA; Let-7; Tumor
Lin28作為一种新的RNA结合蛋白(RNA binding protein,RBP),最早于秀丽隐杆线虫中发现,它在正常细胞分裂、分化过程中对多种靶向基因具有反馈调控作用。研究Lin28与肿瘤的发生、转移以及耐药已经成为当前分子生物学研究热点之一,近年来随着对Lin28功能的深入研究发现,它对肿瘤细胞的分化、代谢、增殖具有调控作用。理解Lin28对细胞癌变、癌变细胞转移、耐药,以及如何抑制肿瘤细胞增殖、预测疗效有重要的意义[1-2]。
1 Lin28的基本结构和功能
RNA结合蛋白(RNA binding protein,RBP)结合mRNA或非编码RNA,形成一个复杂的结构称为信使核糖核蛋白颗粒(mRNPs),通过mRNPs调节转录后的基因表达,主要表现在参与基因编码序列(coding sequence,CDS)的转录、mRNA的合成及转运、poly(A),维持RNA的稳态防止其失活,以及在细胞中起着定位和翻译控制RNA等作用。Lin28是一种RNA结合蛋白(RNA binding protein,RBP),主要表达于细胞的胞浆内,细胞核内也可以少量表达。目前发现的Lin28是一类小于30 kD的蛋白,其有Lin28A和Lin28B两种类型结合蛋白,它们有相似的结构和功能。……
