转录因子ETS1激活长链非编码RNA XIST促进胶质瘤细胞增殖  

Transcription Factor ETS1 Promotes Glioma Cell Growth by Activating LncRNA XIST

作　　者：罗然[1] 罗文溢 陆铭鎧 周猛 刘彦廷 田春雷[1,2] LUO Ran;LUO Wenyi;LU Mingkai;ZHOU Meng;LIU Yanting;TIAN Chunlei(Neurosurgery of The First College of Clinical Medical Science,China Three Gorges University and Yichang Central People’s Hospital,Yichang 443003,China;Institute of Neurology,Three Gorges University,Yichang 443003,China)

机构地区：[1]三峡大学第一临床医学院&宜昌市中心人民医院神经外科,宜昌443003 [2]三峡大学神经病学研究所,宜昌443003

出　　处：《肿瘤防治研究》2024年第5期328-335,共8页Cancer Research on Prevention and Treatment

基　　金：宜昌市医疗卫生研究项目(A20-2-011)。

摘　　要：目的探讨ETS原癌基因1(ETS1)在胶质瘤中的生物学功能及其下游机制。方法生物信息学和免疫组织化学分析ETS1在胶质瘤组织中的表达;实时定量PCR(qRT-PCR)检测ETS1 mRNA和长链非编码RNA(lncRNA)X染色体失活特异转录本(XIST)的表达水平。CCK-8和5-乙炔基-2'-脱氧尿苷摄入实验检测细胞增殖。Western blot检测凋亡相关蛋白(Bax、Bak、Bcl-2)的表达。PROMO数据库预测ETS1与XIST启动子的结合位点。双荧光素酶报告基因实验和染色质免疫共沉淀-PCR用于验证ETS1与XIST启动子区域的结合关系。cBioPortal数据库分析ETS1 mRNA与lncRNA XIST在胶质瘤组织中表达的相关性。结果ETS1 mRNA和蛋白的表达水平在胶质瘤中显著上调(P<0.05)。敲低ETS1可显著抑制胶质瘤细胞增殖(P<0.05)并促进细胞凋亡(P<0.05)。ETS1可靶向结合XIST并促进XIST的表达(P<0.05),过表达XIST可逆转敲低ETS1对胶质瘤细胞增殖的抑制作用(P<0.05)以及对细胞凋亡的促进作用(P<0.05)。结论ETS1在胶质瘤组织中高表达,其可能通过促进lncRNA XIST高表达而减少细胞凋亡和促进胶质瘤细胞增殖。Objective To explore the biological function and downstream mechanism of ETS1 in glioma.Methods Bioinformatics and immunohistochemistry were used to analyze the differential expression characteristics of ETS1 in gliomas;qRT-PCR was employed to detect the expression level of ETS1 mRNA and lncRNA X-inactive specific transcript(XIST).CCK-8 and 5-ethyl-2′-deoxyuridine experiments were conducted to detect cell growth.Western blot was used to detect the expression of apoptosis-related proteins(Bax,Bak,Bcl-2).PROMO database was utilized to predict the binding sites between ETS1 and XIST promoter.Dual-luciferase reporter gene assay and chromatin immunoprecipitation-quantitative polymerase chain reaction assays were performed to verify the binding relationship between ETS1 and the XIST promoter region.cBioPortal database was used to analyze the correlation between the expression of ETS1 mRNA and XIST in glioma tissues.Results The expression levels of ETS1 mRNA and protein were significantly upregulated in glioma(P<0.05).The depletion of ETS1 significantly inhibited the proliferation of glioma cells and promoted cell apoptosis(P<0.05).ETS1 could target and bind with the XIST promoter and promote the expression of XIST(P<0.05).The overexpression of XIST reversed the effects of ETS1 on the proliferation of glioma cells and the promotion of cell apoptosis(P<0.05).Conclusion ETS1 is highly expressed in glioma tissues.It could promote the expression of lncRNA XIST,boost the proliferation of glioma cells,and inhibit cell apoptosis.

关 键 词：胶质瘤 ETS原癌基因1 长链非编码RNA XIST 

分 类 号：R739.41[医药卫生—肿瘤]