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长链非编码RNA(LncRNA)广泛参与机体生理和病理过程。其中,HOX转录反义RNA(HOTAIR)由HOXC基因座的反义链转录,却主要调控HOXD基因。HOTAIR能引导多梳抑制复合体2(PRC2)和赖氨酸特异性组蛋白去甲基化酶1(LSDI)复合体靶向特定目标基因,使组蛋白H3第27位赖氨酸三甲基化(H3K27me3)和组蛋白H3第4位赖氨酸二甲基化(H3K4me2),引起染色体状态重编程,从而使染色体封闭,继而导致靶基因沉默。HOTAIR与人类多种肿瘤如肝细胞癌、胰腺癌、胃肠道间质瘤和大肠癌等的发生、发展、复发以及转移有着相关性,有望成为相关肿瘤的预测指标和新的治疗靶点。该文阐述了HOTAIR的可能作用机制及其信号通路,并总结了其与上述各类肿瘤关系研究的最新进展。  相似文献
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目的 对哮喘患者血清中差异性表达的lncRNA进行初步筛选,找到可以对哮喘诊断提供临床意义的潜在新型分子标志物.方法 收集哮喘患者血清50例,健康体检者血清32例,选择17种循环lncRNA,包括HULC、PRNCR1、TUSC7、PCGEM1、PCA3、TUC338、MEG3、UCA1、PTENP1、SNHG16、MALAT1、THRIL、NAET1、lnc-IL7R、GAS5、MIR155HG、TUG1.利用实时荧光定量PCR(RT-qPCR)技术检测lncRNA在血清中的差异性表达.结果 对17种lncRNA进行筛查表明,lncRNA PCGEM1在哮喘患者血清中表达水平显著低于体检者血清(P<0.01).另外,GAPDH作为内参,在筛选lncRNA的过程中表达稳定,其不受样本年龄、性别、发病情况的影响.结论 lncRNA PCGEM1在哮喘患者血清中显著低表达,可能成为临床诊断哮喘潜在的新型分子标志物.GAPDH可以作为本实验的循环lncRNA筛选的内参.  相似文献
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长链非编码RNA(long non-coding RNA,lncRNA)在癌症中的研究崭露头角,研究显示其在肿瘤的形成中具有潜在的促癌或抑癌作用。人们发现lncRNA在不同肿瘤中经常出现异常表达,但其具体的生物学功能大多数至今尚不清楚。越来越多研究者相继报道了一些lncRNA在肿瘤中潜在的功能及其分子机制,提示lncRNA在肿瘤的发生、发展中具有重要作用。  相似文献
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In China, hepatitis B virus (HBV) infection is the major cause of hepatocellular carcinoma (HCC), which is called HBV-related HCC (HBV-HCC), but the pathogenesis has not been clearly elucidated. Long non-coding RNAs (lncRNAs) have been paid increasing attention to, as an important regulatory molecule involved in many biological processes, as well as a variety of diseases. This study examined lncRNA that might play an important role in HBV-HCC pathogenesis by conducting lncRNA and mRNA profile comparison between HBV-HCC and normal liver tissues. The differentially expressed lncRNA and mRNA profiles between HBV-HCC and normal liver tissues were analyzed by microarrays. The potential protein-encoding gene regulated by lncRNA, and the biological function (gene ontology, pathway analysis) of the target gene were investigated. The results showed that the expression levels of lncRNA and mRNA in HBV-HCC tissues were different from those in normal liver tissues. As compared with normal liver tissue, 837 (4.30%) lncRNAs exhibited more than two-fold change (P<0.05); 325 were up-regulated, and 512 were down-regulated; 991 (5.70%) mRNAs exhibited more than 2-fold change (P<0.05); 733 were up-regulated and 258 were down-regulated in HBV-HCC tissue. Besides, there were 7 lncRNAs with above 10-fold elevation, 6 lncRNAs with above 10-fold decrease, 18 mRNAs with above 10-fold elevation and 11 mRNAs with above 10-fold decrease. 444 (53.05%) lncRNAs had their corresponding mRNAs, some of which were adjacent to lncRNAs. The biological analysis showed that the target gene of differentially expressed lncRNAs took part in the important bio- logical regulatory function. Target gene-related pathway analysis revealed the pathways in carcinoma and mitogen-activated protein kinase (MAPK) signaling pathways significantly changed in the HBV-HCC tissues as compared with normal liver tissues (P<0.05). It was suggested that as compared with normal liver tissues, the expression of lncRNAs in HBV-HCC tissues changed significantly, and lncRNAs played a key role in the pathogenesis of HBV-HCC probably by mainly regulating the carcinoma-related signaling pathway and MAPK signaling pathways.  相似文献
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金桂花  王丽娟  朱青  白娥  周侠  李萌 《西部医学》2013,25(9):1418-1421
近几年研究发现长链非编码RNA(10ngnon—coding RNA,IncRNA)在肿瘤的发生发展过程中发挥着重要的作用。IncRNA是一类转录本长度大于200个核苷酸不编码蛋白质的RNA分子,在正常细胞与肿瘤细胞的基因表达调节中起着重要作用,lncRNA与肿瘤细胞的增殖、浸润、转移和复发密切相关。在膀胱癌中lncRNA可以作为检测指标及预后因子,有望成为疾病治疗的新靶点。本文对lncRNA在膀胱癌中的研究进展进行综述,探讨lncRNA在调控膀胱癌发生发展中的作用机制。  相似文献
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基因表达与调控方面的研究改变了我们对RNA的认识。近年的研发现,长非编码RNA(lncRNA通常大于200碱基而区别于microRNA)参与了一些重要的生命过程,包括染色质修饰、基因转录和转录后调节、蛋白质的活性调节和亚细胞定位以及细胞结构的维持等。新的发现引起越来越多的重视,但这些仍只是非编码RNA的一小部分,人们相信随着研究的深入,lncRNA的调控网络将渐渐浮出水面,不仅对我们认识生命过程的新调节层面有很大帮助,而且具有极大的应用潜力,例如用于基因治疗等方面。  相似文献
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目的利用长链非编码RNA表达谱芯片技术筛选系统性红斑狼疮(SLE)患者的差异表达长链非编码RNA并对其进行分析,以进一步阐明系统性红斑狼疮发病的分子机制。方法分采用利用长链非编码RNA表达谱芯片检测技术,筛查系统性红斑狼疮及健康对照组单个核细胞中的差异表达长链非编码RNA,并通过Rreal-time PCR对部分差异表达基因进行验证。结果 uc003ngn、uc010loq、uc003wbg、uc003wax、HM-lincRNA1145、uc010jsn、uc003wax、HMlincRNA1145等lncRNA在SLE患者外周血单个核细胞中显著上调,AK022005、uc010cik、uc010gdp、uc010nwn、uc010imt、HMlincRNA678等lncRNA在SLE患者外周血单个核细胞中显著下调。结论多个长链非编码RNA在SLE患者外周血单个核细胞中异常表达,提示它们可能在SLE的发生发展中起着重要的调控作用。  相似文献
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分析了Web of Science 2003-2012年收录的长链非编码RNA( long non-coding RNA或long noncoding RNA,lncRNA)文献的发表时间、期刊分布、国家/地区分布、机构分布和学科分布,探讨了lncRNA文献的分布规律,评价了其研究阶段并预测了其未来发展,为我国lncRNA的相关研究提供参考.  相似文献
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