目的泛癌分析长链非编码RNA(lncRNA)MIR22HG的表达及其与临床特征的关系。方法R语言分析癌症基因组图谱(TCGA)中MIR22HG在不同肿瘤组织中的表达及其与临床分期、淋巴结转移、肿瘤突变负荷(TMB)及微卫星不稳定(MSI)的关系;应用TIMER比较M...目的泛癌分析长链非编码RNA(lncRNA)MIR22HG的表达及其与临床特征的关系。方法R语言分析癌症基因组图谱(TCGA)中MIR22HG在不同肿瘤组织中的表达及其与临床分期、淋巴结转移、肿瘤突变负荷(TMB)及微卫星不稳定(MSI)的关系;应用TIMER比较MIR22HG表达与免疫浸润的关系;使用cBioPortal分析MIR22HG的突变频率及其与预后的关系;使用GDSC在线数据库分析MIR22HG与化疗药物敏感性的关系。利用GEO数据库肝癌数据集和12对肝癌标本验证MIR22HG在肝癌中的表达及其与索拉非尼治疗反应的关系;分析MIR22HG表达与索拉非尼治疗预后的关系;在肝癌细胞株HCC-LM3中过表达MIR22HG(NC组,MIR22HG过表达组),在肝癌细胞株MHCC-97H中敲除MIR22HG(NC组,sh-MIR22HG组),采用CCK-8检测肝癌细胞中MIR22HG对索拉非尼IC_(50)的影响。结果MIR22HG在大多数肿瘤中低表达(P<0.05),且多数肿瘤中MIR22HG基因存在缺失突变,其突变与肿瘤不良预后相关(P<0.05)。MIR22HG的表达水平与多种肿瘤的临床分期及淋巴结转移相关(P<0.05)。在多种肿瘤中MIR22HG的表达水平与TBM、MSI、免疫评分、免疫检查点相关基因表达及化疗药的药物敏感性显著相关(P<0.05)。6种常见免疫细胞中,中性粒细胞浸润水平与MIR22HG的表达水平相关性最强,尤其在乳腺癌、直肠癌及肾乳头状细胞癌中明显。多个数据集的分析结果验证MIR22HG在肝癌中低表达,且其低表达与肝癌进展相关(P<0.05)。MIR22HG低表达的患者经索拉非尼治疗后预后较好(HR=2.94,P=0.075),其低表达能有效预测肝癌患者索拉非尼治疗效果(AUC=0.8095)。过表达MIR22HG能降低肝癌细胞对索拉非尼的敏感性(IC_(50 NC) vs IC_(50 MIR22HG)=7.731 vs 15.61);而敲除MIR22HG的表达则能增加肝癌细胞对索拉非尼的敏感性(IC_(50 NC) vs IC50sh-MIR22HG=7.986 vs 5.085)。结论MIR22HG的表达与多种肿瘤的分期、有否淋巴结转移、肿瘤突变负荷、微卫星不稳定、免疫细胞浸润及化疗药物敏感性相关。展开更多
Background:Abnormal expression of long non-coding RNAs(lncRNAs)has been found in almost all tumors in humans,providing numerous potential diagnostic and prognostic biomarkers,and therapeutic targets.Materials and meth...Background:Abnormal expression of long non-coding RNAs(lncRNAs)has been found in almost all tumors in humans,providing numerous potential diagnostic and prognostic biomarkers,and therapeutic targets.Materials and methods:The Cancer Genome Atlas(TCGA)database was used to screen potential LncRNAs,and 30 paired hepatocellular carcinoma(HCC)tissues were used to investigate RP11-307C12.11 expression levels by qRT-PCR and another 105 HCC tissues by in situ hybridizsation(ISH).RP11-307C12.11 overexpression and knockdown experiments were performed to investigate the effects of RP11-307C12.11 on HCC growth through in vitro and in vivo assays(MTT assay,colony formation assay,EdU assay,and xenograft model).The molecular mechanism underlying these effects was confirmed by MS2-RIP-assay,RIP assay,luciferase assay,and rescue experiments.Results:RP11-307C12.11 expression level was significantly higher in tumor tissues than in the adjacent normal tissues.Elevated RP11-307C12.11 expression level was associated with poor prognosis of HCC patients,and it may be represented as an independent prognostic biomarker in patients with HCC.Functionally,RP11-307C12.11 overexpression promoted HCC growth both in vitro and in vivo;however,its knockdown reversed these effects.Mechanistically,we found that RP11-307C12.11 expressed predominantly in the cytoplasm and sponged microRNA(miR)-138 to regulate its common target CCND1 and PDK1.Conclusions:Thus,we found that RP11-307C12.11 acts as an oncogene in HCC by binding to miR-138,which might provide a novel target for HCC therapy.展开更多
文摘目的泛癌分析长链非编码RNA(lncRNA)MIR22HG的表达及其与临床特征的关系。方法R语言分析癌症基因组图谱(TCGA)中MIR22HG在不同肿瘤组织中的表达及其与临床分期、淋巴结转移、肿瘤突变负荷(TMB)及微卫星不稳定(MSI)的关系;应用TIMER比较MIR22HG表达与免疫浸润的关系;使用cBioPortal分析MIR22HG的突变频率及其与预后的关系;使用GDSC在线数据库分析MIR22HG与化疗药物敏感性的关系。利用GEO数据库肝癌数据集和12对肝癌标本验证MIR22HG在肝癌中的表达及其与索拉非尼治疗反应的关系;分析MIR22HG表达与索拉非尼治疗预后的关系;在肝癌细胞株HCC-LM3中过表达MIR22HG(NC组,MIR22HG过表达组),在肝癌细胞株MHCC-97H中敲除MIR22HG(NC组,sh-MIR22HG组),采用CCK-8检测肝癌细胞中MIR22HG对索拉非尼IC_(50)的影响。结果MIR22HG在大多数肿瘤中低表达(P<0.05),且多数肿瘤中MIR22HG基因存在缺失突变,其突变与肿瘤不良预后相关(P<0.05)。MIR22HG的表达水平与多种肿瘤的临床分期及淋巴结转移相关(P<0.05)。在多种肿瘤中MIR22HG的表达水平与TBM、MSI、免疫评分、免疫检查点相关基因表达及化疗药的药物敏感性显著相关(P<0.05)。6种常见免疫细胞中,中性粒细胞浸润水平与MIR22HG的表达水平相关性最强,尤其在乳腺癌、直肠癌及肾乳头状细胞癌中明显。多个数据集的分析结果验证MIR22HG在肝癌中低表达,且其低表达与肝癌进展相关(P<0.05)。MIR22HG低表达的患者经索拉非尼治疗后预后较好(HR=2.94,P=0.075),其低表达能有效预测肝癌患者索拉非尼治疗效果(AUC=0.8095)。过表达MIR22HG能降低肝癌细胞对索拉非尼的敏感性(IC_(50 NC) vs IC_(50 MIR22HG)=7.731 vs 15.61);而敲除MIR22HG的表达则能增加肝癌细胞对索拉非尼的敏感性(IC_(50 NC) vs IC50sh-MIR22HG=7.986 vs 5.085)。结论MIR22HG的表达与多种肿瘤的分期、有否淋巴结转移、肿瘤突变负荷、微卫星不稳定、免疫细胞浸润及化疗药物敏感性相关。
基金supported by:the National Natural Science Foundation of China(81702393,81770648,81670601,81570593)Key Scientific and Technological Projects of Guangdong Province(2015B020226004,2017A020215178)+4 种基金Guangdong Natural Science Foundation(2017A030310373,2015A030312013)Science and Technology Planning Project of Guangdong Province(2017B030314027,2017B020209004,2015B020226004)Science and Technology Planning Project of Guangzhou(2014Y2e00544)Guangzhou Science and Technology Huimin Special Project(2014Y2e00200)Sun Yat-sen University Young Teacher Training Project(17ykpy47).
文摘Background:Abnormal expression of long non-coding RNAs(lncRNAs)has been found in almost all tumors in humans,providing numerous potential diagnostic and prognostic biomarkers,and therapeutic targets.Materials and methods:The Cancer Genome Atlas(TCGA)database was used to screen potential LncRNAs,and 30 paired hepatocellular carcinoma(HCC)tissues were used to investigate RP11-307C12.11 expression levels by qRT-PCR and another 105 HCC tissues by in situ hybridizsation(ISH).RP11-307C12.11 overexpression and knockdown experiments were performed to investigate the effects of RP11-307C12.11 on HCC growth through in vitro and in vivo assays(MTT assay,colony formation assay,EdU assay,and xenograft model).The molecular mechanism underlying these effects was confirmed by MS2-RIP-assay,RIP assay,luciferase assay,and rescue experiments.Results:RP11-307C12.11 expression level was significantly higher in tumor tissues than in the adjacent normal tissues.Elevated RP11-307C12.11 expression level was associated with poor prognosis of HCC patients,and it may be represented as an independent prognostic biomarker in patients with HCC.Functionally,RP11-307C12.11 overexpression promoted HCC growth both in vitro and in vivo;however,its knockdown reversed these effects.Mechanistically,we found that RP11-307C12.11 expressed predominantly in the cytoplasm and sponged microRNA(miR)-138 to regulate its common target CCND1 and PDK1.Conclusions:Thus,we found that RP11-307C12.11 acts as an oncogene in HCC by binding to miR-138,which might provide a novel target for HCC therapy.