目的观察和分析外周血microRNA-23b作为胃癌筛查分子标志物的应用价值。方法选取100例接受胃镜病理活检者作为研究对象,根据检查结果将其分为三组,确诊为胃癌者列为胃癌组,共纳入46例;确诊为胃癌前病变者列为癌前病变组,共纳入28例;胃...目的观察和分析外周血microRNA-23b作为胃癌筛查分子标志物的应用价值。方法选取100例接受胃镜病理活检者作为研究对象,根据检查结果将其分为三组,确诊为胃癌者列为胃癌组,共纳入46例;确诊为胃癌前病变者列为癌前病变组,共纳入28例;胃粘膜检查结果基本正常者列为对照组,共纳入26例。应用定量real time PCR检测技术对三组研究对象外周血样本中的miRNA-23b表达水平进行检测和比较。结果对照组研究对象的外周血样本的Log2△Ct值显著高于癌前病变组(P<0.05),而且癌前病变组的Log2△Ct值显著高于胃癌组(P<0.05);胃癌组、癌前病变组和对照组研究对象外周血样本中的miRNA-23b表达阳性率分别为71.7%、32.1%和3.8%,胃癌组的阳性率显著高于癌前病变组(P<0.05),癌前病变组显著高于对照组(P<0.05)。与胃镜活检结果对比,其阳性预测值为76.7%,阴性预测值为77.2%。结论胃癌患者外周血中miRNA-23b表达水平可反映患者病情的进展程度,且其诊断效率较高,有望成为用于胃癌早期筛查的新型分子标志物。展开更多
Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-t...Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.展开更多
文摘目的观察和分析外周血microRNA-23b作为胃癌筛查分子标志物的应用价值。方法选取100例接受胃镜病理活检者作为研究对象,根据检查结果将其分为三组,确诊为胃癌者列为胃癌组,共纳入46例;确诊为胃癌前病变者列为癌前病变组,共纳入28例;胃粘膜检查结果基本正常者列为对照组,共纳入26例。应用定量real time PCR检测技术对三组研究对象外周血样本中的miRNA-23b表达水平进行检测和比较。结果对照组研究对象的外周血样本的Log2△Ct值显著高于癌前病变组(P<0.05),而且癌前病变组的Log2△Ct值显著高于胃癌组(P<0.05);胃癌组、癌前病变组和对照组研究对象外周血样本中的miRNA-23b表达阳性率分别为71.7%、32.1%和3.8%,胃癌组的阳性率显著高于癌前病变组(P<0.05),癌前病变组显著高于对照组(P<0.05)。与胃镜活检结果对比,其阳性预测值为76.7%,阴性预测值为77.2%。结论胃癌患者外周血中miRNA-23b表达水平可反映患者病情的进展程度,且其诊断效率较高,有望成为用于胃癌早期筛查的新型分子标志物。
基金supported by the Medical Science and Technology Research Foundation of Guangdong Province(No.A2020559).
文摘Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.