Objective:Circular ribose nudeic acids(circRNAs)are implicated in tumor progression and drug resistance of prostate cancer(PCa).The current work explored the function of circ_0005203(aircTHSD4)in the malignancy and do...Objective:Circular ribose nudeic acids(circRNAs)are implicated in tumor progression and drug resistance of prostate cancer(PCa).The current work explored the function of circ_0005203(aircTHSD4)in the malignancy and docetaxel(DTX)resistance of PCa.Methods:circTHSD4 expression within PCa as well as matched non-carcinoma samples was measured through real time reverse transcription quantitative polymerase chain reaction(RT-qPCR).In addition,a subcellular fraction assay was conducted to determine circTHSD4 subcellular localization within PCa cells.In addition,we performed a Western blot(WB)assay to detect high mobility.group A2 protein(HMGA2)levels.Besides,functional associations of two molecules were investigated through dual luciferase reporter assay.Cell Counting Kit(CCK)-8,colony formation together with Transwell assay was conducted to assess malignant phenotypes of PCa cells,whereas flow cytometry was performed to determine cell apoptosis.Furthermore,a xenograft mouse model was constructed to verify the effect of circTHSD4 on the carcinogenesis of PCa cells.Results:According to RT-qPCR results,circTHSD4 was up-regulated within PCa tissues and cells,which predicted the dismal prognostic outcome of PCa cases.circTHSD4 silencing within PCa cells markedly suppressed cell growth,migration,and colony fomation.circTHSD4 silencing remarkably elevated PCa cell apoptosis and carcinogenesis within the xenograft model.Further,circTHSD4 silencing enhanced docetaxel(DTX)sensitivity in PCa cells.Furthermore,we demonstrated that circTHSD4 modulated the malignancy of PCa cells by regulating HMGA2 expression through sponging miR 203.Conclusion:Together,our findings suggest that cirCTHSD4 overexpression could promote the malignant phenotype and DTX resistance in PCa through the regulation of the miR 203/HMGA2 axis.展开更多
背景与目的高迁移率族蛋白A2(High mobility group A2,HMGA2)是与染色体结合的非组蛋白,在许多恶性肿瘤中高表达并与预后有关。本研究探讨HMGA2在非小细胞肺癌(NSCLC)中的表达的临床特征及其意义。方法采用免疫组化SP法检测59例手术切...背景与目的高迁移率族蛋白A2(High mobility group A2,HMGA2)是与染色体结合的非组蛋白,在许多恶性肿瘤中高表达并与预后有关。本研究探讨HMGA2在非小细胞肺癌(NSCLC)中的表达的临床特征及其意义。方法采用免疫组化SP法检测59例手术切除非小细胞肺癌组织,10例非肿瘤组织中HMGA2表达。采用c2检验,Kaplan-Meier生存曲线和Cox回归分析,比较与HMGA2表达相关因素及其对生存期的影响。结果非小细胞肺癌组织中HMGA2表达率78%(46/59),其中肺鳞癌表达率70.4%(19/27),肺腺癌表达率82.1%(23/28),4例腺鳞癌均表达,而10例非肿瘤组织中均不表达。HMGA2表达与TNM分期,淋巴结转移相关(P<0.05)。Cox多因素回归分析显示TNM分期是本组患者独立预后因子。结论HMGA2在非小细胞肺癌中呈过度表达,与TNM分期、淋巴结转移相关。展开更多
基金Fujian Provincial Health and Middleaged and Young Backbone Talents Training Project“The role and Mechanism of C53 in mcRPC Treatment of Drug Resistance”(2019-ZQN-77).
文摘Objective:Circular ribose nudeic acids(circRNAs)are implicated in tumor progression and drug resistance of prostate cancer(PCa).The current work explored the function of circ_0005203(aircTHSD4)in the malignancy and docetaxel(DTX)resistance of PCa.Methods:circTHSD4 expression within PCa as well as matched non-carcinoma samples was measured through real time reverse transcription quantitative polymerase chain reaction(RT-qPCR).In addition,a subcellular fraction assay was conducted to determine circTHSD4 subcellular localization within PCa cells.In addition,we performed a Western blot(WB)assay to detect high mobility.group A2 protein(HMGA2)levels.Besides,functional associations of two molecules were investigated through dual luciferase reporter assay.Cell Counting Kit(CCK)-8,colony formation together with Transwell assay was conducted to assess malignant phenotypes of PCa cells,whereas flow cytometry was performed to determine cell apoptosis.Furthermore,a xenograft mouse model was constructed to verify the effect of circTHSD4 on the carcinogenesis of PCa cells.Results:According to RT-qPCR results,circTHSD4 was up-regulated within PCa tissues and cells,which predicted the dismal prognostic outcome of PCa cases.circTHSD4 silencing within PCa cells markedly suppressed cell growth,migration,and colony fomation.circTHSD4 silencing remarkably elevated PCa cell apoptosis and carcinogenesis within the xenograft model.Further,circTHSD4 silencing enhanced docetaxel(DTX)sensitivity in PCa cells.Furthermore,we demonstrated that circTHSD4 modulated the malignancy of PCa cells by regulating HMGA2 expression through sponging miR 203.Conclusion:Together,our findings suggest that cirCTHSD4 overexpression could promote the malignant phenotype and DTX resistance in PCa through the regulation of the miR 203/HMGA2 axis.
文摘背景与目的高迁移率族蛋白A2(High mobility group A2,HMGA2)是与染色体结合的非组蛋白,在许多恶性肿瘤中高表达并与预后有关。本研究探讨HMGA2在非小细胞肺癌(NSCLC)中的表达的临床特征及其意义。方法采用免疫组化SP法检测59例手术切除非小细胞肺癌组织,10例非肿瘤组织中HMGA2表达。采用c2检验,Kaplan-Meier生存曲线和Cox回归分析,比较与HMGA2表达相关因素及其对生存期的影响。结果非小细胞肺癌组织中HMGA2表达率78%(46/59),其中肺鳞癌表达率70.4%(19/27),肺腺癌表达率82.1%(23/28),4例腺鳞癌均表达,而10例非肿瘤组织中均不表达。HMGA2表达与TNM分期,淋巴结转移相关(P<0.05)。Cox多因素回归分析显示TNM分期是本组患者独立预后因子。结论HMGA2在非小细胞肺癌中呈过度表达,与TNM分期、淋巴结转移相关。
文摘目的:探讨敲减高迁移率族蛋白A2( HMGA2 )基因表达对转化生长因子β1(TGF-β1)诱导的人胚肺成纤维细胞活力、凋亡、胶原合成和氧化应激的影响。方法:实验分为空白组、TGF-β1组、阴性转染对照组和HMGA2 siRNA(si-HMGA2)组。Western blot 检测HMGA2、AKT和p-AKT蛋白水平;MTT法及流式细胞术分别检测细胞活力及凋亡率;RT-qPCR检测Ⅰ型胶原蛋白(COL -Ⅰ)和COL-Ⅲ的mRNA表达;DCFH-DA探针检测细胞活性氧簇(ROS)的含量。结果:与空白组比较,TGF-β1组HMGA2和p-AKT的蛋白水平、细胞活力及COL -Ⅰ和COL-Ⅲ的mRNA表达均明显升高,细胞凋亡率及ROS水平则明显降低( P <0.05);与TGF-β1组比较,si-HMGA2组HMGA2和p-AKT的蛋白水平、细胞活力及COL -Ⅰ和COL-Ⅲ的mRNA表达均明显降低,细胞凋亡率及ROS水平则明显升高( P <0.05)。结论:敲减HMGA2 基因可抑制TGF-β1诱导的人胚肺成纤维细胞生长和胶原合成,促进细胞凋亡及ROS产生,其机制可能与下调PI3K/AKT信号通路有关。
