BACKGROUND Ectopic expression of miRNAs promotes tumor development and progression.miRNA(miR)-320a is downregulated in many cancers,including gastric cancer(GC).However,the mechanism underlying its downregulation and ...BACKGROUND Ectopic expression of miRNAs promotes tumor development and progression.miRNA(miR)-320a is downregulated in many cancers,including gastric cancer(GC).However,the mechanism underlying its downregulation and the role of miR-320a in GC are unknown.AIM To determine expression and biological functions of miR-320a in GC and investigate the underlying molecular mechanisms.METHODS Quantitative real-time polymerase chain reaction(PCR)was used to determine expression of miR-320a in GC cell lines and tissues.TargetScanHuman7.1,miRDB,and microRNA.org were used to predict the possible targets of miR-320a,and a dual luciferase assay was used to confirm the findings.Western blotting was used to detect the protein levels of pre-B-cell leukemia homeobox 3(PBX3)in GC cells and tissue samples.Cell Counting Kit-8 proliferation,Transwell,wound healing,and apoptosis assays were performed to analyze the biological functions of miR-320a in GC cells.Methylation-specific PCR was used to analyze the methylation level of the miR-320a promoter CpG islands.5-Aza-2’-deoxycytidine(5-Aza-CdR)and trichostatin A(TSA)were used to treat GC cells.RESULTS miR-320a expression was lower in GC cell lines and tissues than in the normal gastric mucosa cell line GES-1 and matched adjacent normal tissues.miR-320a overexpression suppressed GC cell proliferation,invasion and migration,and induced apoptosis.PBX3 was a target of miR-320a in GC.The methylation level of the miR-320a promoter CpG islands was elevated and this was partly reversed by 5-Aza-CdR and TSA.CONCLUSION miR-320a acts as a tumor suppressor and inhibits malignant behavior of GC cells,partly by targeting PBX3.DNA methylation is an important mechanism associated with low expression of miR-320a.展开更多
We rechecked the original data of Figure 3,Part.B,and found that 0 h group in the BGC-823 cell wound scratch assay was misapplied.Therefore,we are writing to apply for the modification of Figure 3,Part.B.
【目的】研究microRNA-320d(miR-320d)对子宫内膜癌JEC细胞上皮-间质转化功能的影响及其相关机制。【方法】JEC子宫内膜癌细胞株分别转染miR-320d mimics和negative control mimic,分别作为M320d、NCM组,并设立未转染对照control组,采用...【目的】研究microRNA-320d(miR-320d)对子宫内膜癌JEC细胞上皮-间质转化功能的影响及其相关机制。【方法】JEC子宫内膜癌细胞株分别转染miR-320d mimics和negative control mimic,分别作为M320d、NCM组,并设立未转染对照control组,采用RT-PCR法检测各组细胞miR-320d含量。Transwell实验检测3组细胞迁移能力和侵袭能力。Westernblot法检测3组细胞α-Catenin和PBX3表达水平,及PBX3过表达对miR-320d抑制EMT的拮抗作用。双荧光素酶实验检测miR-320d与PBX3的关系。【结果】M320d组miR-320d的表达水平为control组的(808.25±15.58)倍(P<0.05)。M320d组迁移细胞数量29.56±0.59低于control组的94.48±1.02(P<0.05)。M320d组侵袭细胞数量7.33±0.84低于control组的86.28±3.51(P<0.05)。M320d组细胞α-Catenin、E-cadherin蛋白表达量(0.365±0.017、0.261±0.008)高于对照组(0.114±0.010、0.151±0.021),Vimentin蛋白表达量(0.105±0.009)低于对照组(0.211±0.025),PBX3蛋白表达量(0.181±0.002)低于对照组(0.311±0.007)。PBX3过表达M320d组子宫内膜癌细胞中α-Catenin、E-cadherin蛋白表达量(0.139±0.019、0.143±0.007)低于对照组(0.399±0.034、0.261±0.017),Vimentin蛋白表达量(0.234±0.008)高于对照组(0.105±0.009),差异均有统计学意义(P<0.05)。双荧光素酶检验结果显示PBX3为miR-320d的下游靶基因。【结论】miR-320d可能通过降低下游靶基因PBX3水平影响EMT相关蛋白表达,抑制子宫内膜癌JEC细胞的上皮-间质转化功能。展开更多
目的探究血清microRNA-21(miR-21)、microRNA-193a-3p(miR-193a-3p)水平与结直肠癌患者手术预后的关系。方法回顾性分析2020年1月—2022年1月苏州大学附属第一医院收治112例结直肠癌患者的病历资料。患者均接受结直肠癌根治术,术后随访1...目的探究血清microRNA-21(miR-21)、microRNA-193a-3p(miR-193a-3p)水平与结直肠癌患者手术预后的关系。方法回顾性分析2020年1月—2022年1月苏州大学附属第一医院收治112例结直肠癌患者的病历资料。患者均接受结直肠癌根治术,术后随访16个月,记录患者的预后生存结局,多因素逐步Logistic回归分析结直肠癌患者手术预后的影响因素,评估血清miR-21、miR-193a-3p对结直肠癌患者预后的预测效能。结果112例结直肠癌患者死亡22例,病死率为19.64%;生存90例,生存率为80.36%。死亡组术前血清miR-21 mRNA相对表达量、临床分期Ⅲ期占比、淋巴结转移率均高于生存组(P<0.05),血清miR-193a-3p m RNA相对表达量低于生存组(P<0.05)。多因素逐步Logistic回归分析结果显示,临床分期Ⅲ期[OR=3.777(95%CI:1.399,10.194)]、淋巴结转移[OR=5.099(95%CI:1.715,15.156)]、miR-21表达升高[OR=4.889(95%CI:1.645,14.533)]、miR-193a-3p表达降低[OR=4.402(95%CI:1.481,13.084)]均是直肠癌患者预后的影响因素(P<0.05)。受试者工作特性曲线分析结果显示,血清miR-21、miR-193a-3p单一及联合预测结直肠癌预后的敏感性分别为69.04%(95%CI:0.487,0.813)、72.73%(95%CI:0.495,0.884)、86.36%(95%CI:0.640,0.964),特异性分别为62.22%(95%CI:0.513,0.720)、68.89%(95%CI:0.581,0.780)、90.00%(95%CI:0.814,0.950),曲线下面积分别为0.782、0.731和0.901。结论结直肠癌患者术前miR-21、miR-193a-3p表达与术后预后密切相关,且在结直肠癌患者的预后结局中表现出良好的预测效能。展开更多
基金Supported by the Natural Science Foundation of Liaoning Province,No.201602817
文摘BACKGROUND Ectopic expression of miRNAs promotes tumor development and progression.miRNA(miR)-320a is downregulated in many cancers,including gastric cancer(GC).However,the mechanism underlying its downregulation and the role of miR-320a in GC are unknown.AIM To determine expression and biological functions of miR-320a in GC and investigate the underlying molecular mechanisms.METHODS Quantitative real-time polymerase chain reaction(PCR)was used to determine expression of miR-320a in GC cell lines and tissues.TargetScanHuman7.1,miRDB,and microRNA.org were used to predict the possible targets of miR-320a,and a dual luciferase assay was used to confirm the findings.Western blotting was used to detect the protein levels of pre-B-cell leukemia homeobox 3(PBX3)in GC cells and tissue samples.Cell Counting Kit-8 proliferation,Transwell,wound healing,and apoptosis assays were performed to analyze the biological functions of miR-320a in GC cells.Methylation-specific PCR was used to analyze the methylation level of the miR-320a promoter CpG islands.5-Aza-2’-deoxycytidine(5-Aza-CdR)and trichostatin A(TSA)were used to treat GC cells.RESULTS miR-320a expression was lower in GC cell lines and tissues than in the normal gastric mucosa cell line GES-1 and matched adjacent normal tissues.miR-320a overexpression suppressed GC cell proliferation,invasion and migration,and induced apoptosis.PBX3 was a target of miR-320a in GC.The methylation level of the miR-320a promoter CpG islands was elevated and this was partly reversed by 5-Aza-CdR and TSA.CONCLUSION miR-320a acts as a tumor suppressor and inhibits malignant behavior of GC cells,partly by targeting PBX3.DNA methylation is an important mechanism associated with low expression of miR-320a.
文摘We rechecked the original data of Figure 3,Part.B,and found that 0 h group in the BGC-823 cell wound scratch assay was misapplied.Therefore,we are writing to apply for the modification of Figure 3,Part.B.
文摘【目的】研究microRNA-320d(miR-320d)对子宫内膜癌JEC细胞上皮-间质转化功能的影响及其相关机制。【方法】JEC子宫内膜癌细胞株分别转染miR-320d mimics和negative control mimic,分别作为M320d、NCM组,并设立未转染对照control组,采用RT-PCR法检测各组细胞miR-320d含量。Transwell实验检测3组细胞迁移能力和侵袭能力。Westernblot法检测3组细胞α-Catenin和PBX3表达水平,及PBX3过表达对miR-320d抑制EMT的拮抗作用。双荧光素酶实验检测miR-320d与PBX3的关系。【结果】M320d组miR-320d的表达水平为control组的(808.25±15.58)倍(P<0.05)。M320d组迁移细胞数量29.56±0.59低于control组的94.48±1.02(P<0.05)。M320d组侵袭细胞数量7.33±0.84低于control组的86.28±3.51(P<0.05)。M320d组细胞α-Catenin、E-cadherin蛋白表达量(0.365±0.017、0.261±0.008)高于对照组(0.114±0.010、0.151±0.021),Vimentin蛋白表达量(0.105±0.009)低于对照组(0.211±0.025),PBX3蛋白表达量(0.181±0.002)低于对照组(0.311±0.007)。PBX3过表达M320d组子宫内膜癌细胞中α-Catenin、E-cadherin蛋白表达量(0.139±0.019、0.143±0.007)低于对照组(0.399±0.034、0.261±0.017),Vimentin蛋白表达量(0.234±0.008)高于对照组(0.105±0.009),差异均有统计学意义(P<0.05)。双荧光素酶检验结果显示PBX3为miR-320d的下游靶基因。【结论】miR-320d可能通过降低下游靶基因PBX3水平影响EMT相关蛋白表达,抑制子宫内膜癌JEC细胞的上皮-间质转化功能。
文摘目的探究血清microRNA-21(miR-21)、microRNA-193a-3p(miR-193a-3p)水平与结直肠癌患者手术预后的关系。方法回顾性分析2020年1月—2022年1月苏州大学附属第一医院收治112例结直肠癌患者的病历资料。患者均接受结直肠癌根治术,术后随访16个月,记录患者的预后生存结局,多因素逐步Logistic回归分析结直肠癌患者手术预后的影响因素,评估血清miR-21、miR-193a-3p对结直肠癌患者预后的预测效能。结果112例结直肠癌患者死亡22例,病死率为19.64%;生存90例,生存率为80.36%。死亡组术前血清miR-21 mRNA相对表达量、临床分期Ⅲ期占比、淋巴结转移率均高于生存组(P<0.05),血清miR-193a-3p m RNA相对表达量低于生存组(P<0.05)。多因素逐步Logistic回归分析结果显示,临床分期Ⅲ期[OR=3.777(95%CI:1.399,10.194)]、淋巴结转移[OR=5.099(95%CI:1.715,15.156)]、miR-21表达升高[OR=4.889(95%CI:1.645,14.533)]、miR-193a-3p表达降低[OR=4.402(95%CI:1.481,13.084)]均是直肠癌患者预后的影响因素(P<0.05)。受试者工作特性曲线分析结果显示,血清miR-21、miR-193a-3p单一及联合预测结直肠癌预后的敏感性分别为69.04%(95%CI:0.487,0.813)、72.73%(95%CI:0.495,0.884)、86.36%(95%CI:0.640,0.964),特异性分别为62.22%(95%CI:0.513,0.720)、68.89%(95%CI:0.581,0.780)、90.00%(95%CI:0.814,0.950),曲线下面积分别为0.782、0.731和0.901。结论结直肠癌患者术前miR-21、miR-193a-3p表达与术后预后密切相关,且在结直肠癌患者的预后结局中表现出良好的预测效能。
