环状RNA hsa_circ_0067582对胃癌细胞增殖及侵袭能力的影响  

Effect of Circular RNA hsa_circ_0067582 on the Proliferation and Invasion Ability of Gastric Cancer Cells

作　　者：陆蓉丹 黄哲 陆佳敏[1] 张海强[3] 邵永富 LU Rongdan;HUANG Zhe;LU Jiamin;ZHANG Haiqiang;SHAO Yongfu(Department of Gastroenterology,the Affiliated Hospital of Medical School of Ningbo University,Ningbo,Zhejiang 315020,China;Department of Emergency,the Affiliated Hospital of Medical School of Ningbo University,Ningbo,Zhejiang 315020,China;Department of Gastrointestinal Surgery,the Affiliated Hospital of Medical School of Ningbo University,Ningbo,Zhejiang 315020,China)

机构地区：[1]宁波大学医学院附属医院消化内科,浙江宁波315020 [2]宁波大学医学院附属医院急诊科,浙江宁波315020 [3]宁波大学医学院附属医院胃肠外科,浙江宁波315020

出　　处：《中国医学科学院学报》2022年第1期81-90,共10页Acta Academiae Medicinae Sinicae

基　　金：宁波市自然科学基金项目(2019A610327);浙江省医药卫生科技项目(2018KY159)。

摘　　要：目的探讨hsa_circ_0067582在胃癌细胞中的表达水平及其对细胞增殖和侵袭能力的影响,并研究hsa_circ_0067582在胃癌中的作用机制。方法hsa_circ_0067582过表达(Oe-circ_0067582)质粒分别转染人胃癌AGS和SGC-7901细胞,CCK-8检测细胞活力情况,细胞克隆形成实验及EdU实验检测细胞增殖;Transwell实验检测细胞侵袭能力;流式细胞术检测细胞凋亡;Western blot检测凋亡及上皮间质转换(EMT)相关蛋白的表达情况,并通过异种移植瘤实验观察Oe-circ_0067582对裸鼠体内SGC-7901细胞生长的影响。生物信息学方法预测hsa_circ_0067582结合的微小RNA(miRNA),并构建竞争性内源RNA(ceRNA)调控网络;对miRNA靶基因进行功能学分析。结果与pLO-ciR组相比,Oe-circ_0067582组的AGS和SGC-7901的细胞活力(t=7.883,P=0.001;t=5.679,P=0.005)、增殖(t=6.709,P=0.003;t=5.857,P=0.003)及侵袭能力(t=7.782,P=0.002;t=6.342,P=0.003)均明显降低,并诱导细胞凋亡(t=7.225,P=0.002;t=11.509,P=0.001)。Western blot结果显示,Oe-circ_0067582组的AGS和SGC-7901细胞半胱氨酸天冬氨酸蛋白酶(Caspase)3(t=6.863,P=0.002;t=7.024,P=0.001)、Caspase 7(t=3.295,P=0.04;t=6.008,P=0.004)、Caspase 9(t=4.408,P=0.012;t=6.278,P=0.004)和E-钙黏蛋白(t=12.453,P=0.002;t=10.867,P=0.001)蛋白表达水平均明显升高,而波形蛋白(t=7.242,P=0.002;t=5.694,P=0.004)和N-钙黏蛋白(t=6.480,P=0.003;t=7.446,P=0.001)蛋白表达水平明显降低。Oe-circ_0067582抑制SGC-7901荷瘤裸鼠体内肿瘤的生长(t=3.526,P=0.017)。根据TargetScan及miRnada数据库获知hsa_circ_0067582可竞争性地结合hsa-miR-181b-3p、hsa-miR-337-3p、hsa-miR-421和hsa-miR-548d-3p。功能富集结果表明miRNA靶基因涉及癌症相关的多个生物学过程,包括细胞凋亡负调控、基因表达、癌症中的转录失调、转化生长因子-β、p53信号通路等。结论Oe-circ_0067582抑制胃癌AGS和SGC-7901细胞增殖,并可能通过减弱EMT进程降低胃癌细胞侵袭能力,为胃癌的预防及治疗提�Objective To investigate the effects on cell proliferation and invasion of the circular RNA hsa_circ_0067582 in gastric cancer(GC).Methods After hsa_circ_0067582 overexpression(Oe-circ_0067582)plasmid was transfected into AGS and SGC-7901 cells,the cell viability,proliferation,invasion ability,and apoptosis were detected by CCK-8,colony formation and EdU assays,Transwell assay,and flow cytometry,respectively.Western blotting was employed to detect the expression levels of proteins related to the cell apoptosis and epithelial-mesenchymal transition(EMT).The effect of Oe-circ_0067582 on the growth of SGC-7901 cells in nude mice was observed.Bioinformatics tools were used to predict the binding target miRNA of hsa_circ_0067582,and the competing endogenous RNA(ceRNA)regulatory network was established.Finally,functional enrichment was performed to analyze the biological functions of the target genes of the predicted miRNA.Results Compared with the pLO-ciR(empty plasmid)group,the Oe-circ_0067582 group in AGS and SGC-7901 cells attenuated the cell viability(t=7.883,P=0.001;t=5.679,P=0.005),proliferation(t=6.709,P=0.003;t=5.857,P=0.003),and invasion ability(t=7.782,P=0.002;t=6.342,P=0.003)and induced cell apoptosis(t=7.225,P=0.002;t=11.509,P=0.001).Western blotting showed that the Oe-circ_0067582 group in AGS and SGC-7901 cells up-regulated the protein levels of cysteinyl aspartate specific proteinase(Caspase)3(t=6.863,P=0.002;t=7.024,P=0.001),Caspase 7(t=3.295,P=0.04;t=6.008,P=0.004),Caspase 9(t=4.408,P=0.012;t=6.278,P=0.004),and E-cadherin(t=12.453,P=0.002;t=10.867,P=0.001),while down-regulated those of Vimentin(t=7.242,P=0.002;t=5.694,P=0.004)and N-cadherin(t=6.480,P=0.003;t=7.446,P=0.001).Furthermore,Oe-circ_0067582 significantly inhibited the growth of tumor in the SGC-7901 tumor-bearing nude mice(t=3.526,P=0.017).The prediction based on TargetScan and miRnada suggested that hsa_circ_0067582 can competitively bind to hsa-miR-181b-3p,hsa-miR-337-3p,hsa-miR-421,and hsa-miR-548d-3p.The functional enrichment indicated t

关 键 词：环状RNA hsa_circ_0067582 胃癌 增殖 侵袭 AGS细胞 SGC-7901细胞 

分 类 号：R735.2[医药卫生—肿瘤]