circ_100284通过miR-217/MAPK1调控食管鳞状细胞癌侵袭及其对5-FU化疗敏感性的影响  

circ_100284 via miR-217/MAPK1 regulates esophageal squamous cell carcinoma invasion and its effects on 5-FU chemotherapy sensitivity

作　　者：史艳伟 米彩锋 牛丽林 杨洋[2] Shi Yan-Wei;Mi Cai-Feng;Niu Li-Lin;Yang Yang(Department of Gastroenterology,the First Affiliated Hospital of Pingdingshan University/Pingdingshan First People's Hospital,Pingdingshan,Henan 467000,China;Department of Thoracic Surgery,the First Affiliated Hospital of Zhengzhou University,Zhengzhou,Henan 450052,China)

机构地区：[1]平顶山学院第一附属医院/平顶山市第一人民医院消化内科,河南平顶山467000 [2]郑州大学第一附属医院胸外科,河南郑州450052

出　　处：《解放军医学杂志》2024年第10期1184-1195,共12页Medical Journal of Chinese People's Liberation Army

基　　金：吴阶平医学基金(24210006)。

摘　　要：目的 探究环状RNA(circ_100284)作为竞争性内源RNA(ceRNA)通过调控miR-217/丝裂原活化蛋白激酶1(MAPK1)影响食管鳞状细胞癌(ESCC)细胞侵袭及其对5-氟尿嘧啶(5-FU)化疗的敏感性。方法 生物信息学分析ESCC中差异表达的circRNAs。qRT-PCR检测ESCC组织和细胞中circ_100284的表达。使用浓度逐渐增加的5-FU处理ESCC细胞KYSE450以建立5-FU耐药KYSE450细胞系(KYSE450-R),MTT实验检测KYSE450和KYSE450-R细胞的IC_(50)。qRT-PCR检测KYSE450和KYSE450-R细胞中circ_100284、miR-217和MAPK1 mRNA的表达,Western blotting检测MAPK1蛋白的表达。取KYSE450-R细胞,设置:(1)空白对照组(不做处理)、si-NC组(转染si-NC)、si-circ_100284组(转染si-circ_100284)、pc-Control组(转染pc-Control)、pc-circ_100284组(转染pc-circ_100284)、pc-circ_100284+mimic NC组(转染pc-circ_100284和mimicNC)与pc-circ_100284+miR-217mimic组(转染pc-circ_100284和miR-217mimic),采用MTT实验检测细胞活力,Transwell实验检测细胞侵袭能力,流式细胞术检测细胞凋亡情况。(2)空白对照组(不做处理)、si-NC组(转染si-MAPK1的阴性对照)、si-MAPK1组(转染si-MAPK1)、si-MAPK1+inhibitor NC组(转染si-MAPK1和inhibitor NC)与si-MAPK1+miR-217inhibitor组(转染si-MAPK1和miR-217 inhibitor),采用qRT-PCR和Western blotting检测MAPK1 mRNA和蛋白的表达,MTT实验检测细胞活力,Transwell实验检测细胞侵袭能力,流式细胞术检测细胞凋亡情况。将circ_100284-WT或circ_100284-MUT报告质粒、MAPK1-WT或MAPK1-MUT报告质粒分别与miR-NC或miR-217 mimic共转染KYSE450-R细胞48 h,采用双荧光素酶报告实验测定荧光素酶相对活性。结果 生物信息学分析显示circ_100284在ESCC中呈高表达。与癌旁正常组织比较,ESCC组织中circ_100284表达明显增加(P<0.05);与健康人食管上皮细胞HEEC比较,ESCC细胞系TE-11、ECA09和KYSE450中circ_100284表达明显增加(P<0.05)。与KYSE450细胞比较,KYSE450-R细胞的IC_(50)增加,circ_100284、MAPK1表达增加但miR-217�Objective To explore the effects of circ_100284 in affecting the invasion of esophageal squamous cell carcinoma(ESCC)cells and their sensitivity to 5-fluorouracil(5-FU)chemotherapy via regulating miR-217/mitogen-activated protein kinase 1(MAPK1)acting as a competing endogenous RNA(ceRNA).Methods The bioinformatics approach was used to analyze the differentially expressed circRNAs in ESCC.qRT-PCR was used to detect the expression of circ_100284 in ESCC tissues and cells.The 5-FU-resistant KYSE450 cell line(KYSE45-R)was established by increasing concentrations of 5-FU.The IC_(50) of 5-FU in KYSE450 and KYSE450-R cells was determined through MTT assay.qRT-PCR was used to detect the expression of circ_100284,miR-217,and MAPK1 mRNA in KYSE450 and KYSE450-R cells,while Western blotting detecting the protein expression of MAPK1.In the experiments with KYSE450-R cells,we set up the following groups:(1)blank group(without treatment),si-NC group(transfected with si-NC),si-circ_100284 group(transfected with si-circ_100284),pc-Control group(transfected with pc-Control),pc-circ_100284 group(transfected with pc-circ_100284),pc-circ_100284+mimic NC group(transfected with pc-circ_100284 and mimic NC),and pc-circ_100284+miR-217 mimic group(transfected with pc-circ_100284 and miR-217 mimic).These groups were subjected to MTT assay to detect cell viability,Transwell assay to detect cell invasion,and flow cytometry to detect cell apoptosis.(2)Blank group(without treatment),si-NC group(transfected with si-MAPK1 negative control),si-MAPK1 group(transfected with si-MAPK1),si-MAPK1+inhibitor NC group(transfected with si-MAPK1 and inhibitor NC),and si-MAPK1+miR-217 inhibitor group(transfected with si-MAPK1 and miR-217 inhibitor).We detected the mRNA and protein expression of MAPK1 using qRT-PCR and Western blotting.We evaluated cell viability using MTT assay,invasion with Transwell assay,and apoptosis by flow cytometry.circ_100284-WT or circ_100284-MUT reporter plasmids,as well as MAPK1-WT or MAPK1-MUT reporter plasmids,were co-transfect

关 键 词：circ_100284 miR-217 丝裂原活化蛋白激酶1 食管癌 化疗敏感性 

分 类 号：R735.1[医药卫生—肿瘤]