伊马替尼耐药K562/G的microRNA表达谱分析及与FOXO3/Bcl-6信号通路关系的研究

目的:探讨CML耐药细胞株K562/G耐药相关的FOXO3/Bcl-6信号通路及相关microRNA(miRNA)机制。方法:采用MTT法检测伊马替尼对K562/G的耐药性;采用Western blot法检测耐药株和敏感株细胞中FOXO3和Bcl-6蛋白的表达情况,实时荧光定量PCR检测FOXO3及Bcl-6 mRNA的表达。运用miRNA芯片技术筛查K562与K562/G细胞之间差异表达的miRNA,进一步筛选FOXO3/Bcl-6信号通路的靶向miRNA。结果:K562/G较K562细胞株的FOXO3及Bcl-6蛋白表达均明显升高(P<0.01);Bcl-6 mRNA的表达水平无明显差异,而K562/G细胞中FOXO3 mRNA表达明显升高(P<0.05)。miRNA芯片结果显示,K562/G与K562细胞之间有109条miRNA存在显著的差异,其中上调miRNA为81个,下调miRNA有28个。经生物信息学反向预测,其中miR-6718-5p、miR-5195-5p、miR-4711-3p、miR-4763-5p、miR-4664-5p和miR-3176与该信号通路相关。结论:伊马替尼耐药与FOXO3/Bcl-6信号通路相关,并且K562/G与K562细胞存在miRNA表达显著差异。     

MiR-199a-5p通过靶向DRAM1调控急性髓系白血病对阿柔比星的敏感性

目的:比较miR-199a-5p在急性髓系白血病(AML)耐药细胞株K562/ADM以及敏感细胞株K562中的表达,研究其对AML耐药的调控效应并探索其机制。方法:采用MTT法检测阿柔比星(ADM)对K562/ADM和K562细胞的生长抑制率并计算IC_(50)。采用实时荧光定量RT-PCR的方法检测2种细胞株(K562/ADM和K562)以及患者骨髓标本(复发难治AML患者和化疗后完全缓解AML患者)中miR-199a-5p的表达。通过细胞转染的方法在K562/ADM细胞中转入miR-199a-5p mimic使其表达上调,在K562细胞中转入miR-199a-5p inhibitor使其表达下调,采用CCK-8法检测ADM对2种细胞的增殖抑制率,实时荧光定量PCR和Western blot法分别检测转染后2种细胞中DRAM1基因和蛋白的表达。双荧光素酶报告基因实验检测miR-199a-5p与DRAM13′UTR是否存在直接结合位点。采用siRNA的方法下调K562/ADM细胞中DRAM1表达,CCK-8法检测ADM对细胞增殖抑制率的变化。结果:ADM对K562/ADM和K562细胞的IC_(50)分别为146.14±0.079和3.08±0.056μg/ml。miR-199a-5p在复发难治AML患者骨髓中的表达明显低于完全缓解患者,在K562/ADM细胞中的表达明显低于K562细胞(P 0.05)。当K562/ADM细胞中miR-199a-5p表达上调时,ADM对细胞的增殖抑制率升高,DRAM1基因和蛋白表达明显下降。当K562细胞中miR-199a-5p表达下调时,ADM对细胞的增殖抑制率明显下降,DRAM1基因和蛋白表达明显升高(P 0.05)。双荧光素酶报告基因实验显示,miR-199a-5p与DRAM1的3′UTR区存在直接结合位点。K562/ADM细胞中DRAM1在基因和蛋白水平表达均明显高于K562细胞(P 0.05)。当K562/ADM细胞中DRAM1基因表达下调后,细胞对ADM的敏感性显著升高(P 0.05)。结论:miR-199a-5p在耐药白血病细胞中呈低表达。miR-199a-5p表达能够调控AML细胞对ADM的敏感性。DRAM1是miR-199a-5p调控AML耐药的功能性靶基因。     

藏族和汉族健康人群血浆miRNA表达谱的差异

目的检测并比较藏族和汉族健康人群血浆miRNA表达谱。方法分别采集246例藏族健康人和128例汉族健康人血浆样本,用Taq Man低密度芯片技术对50例藏族和50例汉族组成的2组人混合血浆中的754种miRNA进行检测,随机选取存在miR-130a-3p和miR-629-5p表达差异的样本,用qRT-PCR法进行验证。结果低密度芯片结果显示,藏族和汉族健康人群血浆中miRNA表达谱的相关系数(r)为0.592。与汉族组相比,藏族组血浆中139种miRNA的表达水平发生明显改变,其中62种miRNA表达上调,77种miRNA表达下调。qRT-PCR进一步证实miR-130a-3p和miR-629-5p在藏族组血浆中的含量明显高于汉族组[(467±27.30)×10-5vs(236±9.69)×10-5和(14.67±0.94)×10-5vs(7.58±0.52)×10-5,P均0.01]。结论藏族人群血浆miRNA的表达谱与汉族人群存在明显差异,临床检测miRNA时应考虑民族因素的影响。     

K562细胞及其耐药细胞株K562/A02细胞白血病耐药相关microRNA筛选

目的 通过检测慢性粒细胞白血病急变细胞系K562及其阿霉素耐药株K562/A02的微小RNA(microRNA、miR)表达差异,探讨microRNA与白血病化疗耐药的关系.方法 MTT法检测K562/A02及其亲本细胞系K562的耐药性能;流式细胞术检测K562与K562/A02细胞的P-gp表达;运用microRNA芯片技术筛查K562与K562/A02细胞之间差异表达的microRNA,随后用实时荧光定量RT-PCR方法进一步证实.结果 阿霉素耐药株K562/A02相对于其亲本细胞系K562对阿霉素的耐药倍数为180倍;K562细胞P-gp的表达率为0.2%,K562/A02细胞P-gp的表达率为86%;microRNA芯片结果显示K562/A02与K562细胞之间有22种microRNA表达存在显著的差异(P<0.01),表达差异在2倍以上的有9种,其中miR-221、miR-155、miR-451在K562/A02细胞表达上调,而miR-98、miR-181a、let-7f、miR-424、let-7g和miR-563则表达下调.实时荧光定量RT-PCR进一步证实了上述结果,并显示miR-451、miR-155、miR-221、let-7f、miR-424在两种细胞中表达差异显著.结论 K562/A02与K562细胞存在microRNA表达差异,其中miR-451、miR-155和miR-221在K562/A02中表达显著上调,而let-7f、miR-424则显著下调,提示microRNA可能参与白血病耐药形成,差异表达的microRNA可能为逆转白血病耐药提供新的作用靶点.     

K562细胞及其耐药细胞株K562/A02细胞白血病耐药相关microRNA筛选

目的 通过检测慢性粒细胞白血病急变细胞系K562及其阿霉素耐药株K562/A02的微小RNA(microRNA、miR)表达差异,探讨microRNA与白血病化疗耐药的关系.方法 MTT法检测K562/A02及其亲本细胞系K562的耐药性能;流式细胞术检测K562与K562/A02细胞的P-gp表达;运用microRNA芯片技术筛查K562与K562/A02细胞之间差异表达的microRNA,随后用实时荧光定量RT-PCR方法进一步证实.结果 阿霉素耐药株K562/A02相对于其亲本细胞系K562对阿霉素的耐药倍数为180倍;K562细胞P-gp的表达率为0.2%,K562/A02细胞P-gp的表达率为86%;microRNA芯片结果显示K562/A02与K562细胞之间有22种microRNA表达存在显著的差异(P<0.01),表达差异在2倍以上的有9种,其中miR-221、miR-155、miR-451在K562/A02细胞表达上调,而miR-98、miR-181a、let-7f、miR-424、let-7g和miR-563则表达下调.实时荧光定量RT-PCR进一步证实了上述结果,并显示miR-451、miR-155、miR-221、let-7f、miR-424在两种细胞中表达差异显著.结论 K562/A02与K562细胞存在microRNA表达差异,其中miR-451、miR-155和miR-221在K562/A02中表达显著上调,而let-7f、miR-424则显著下调,提示microRNA可能参与白血病耐药形成,差异表达的microRNA可能为逆转白血病耐药提供新的作用靶点.     

K562细胞及其耐药细胞株K562/A02细胞白血病耐药相关microRNA筛选

目的 通过检测慢性粒细胞白血病急变细胞系K562及其阿霉素耐药株K562/A02的微小RNA(microRNA、miR)表达差异,探讨microRNA与白血病化疗耐药的关系.方法 MTT法检测K562/A02及其亲本细胞系K562的耐药性能;流式细胞术检测K562与K562/A02细胞的P-gp表达;运用microRNA芯片技术筛查K562与K562/A02细胞之间差异表达的microRNA,随后用实时荧光定量RT-PCR方法进一步证实.结果 阿霉素耐药株K562/A02相对于其亲本细胞系K562对阿霉素的耐药倍数为180倍;K562细胞P-gp的表达率为0.2%,K562/A02细胞P-gp的表达率为86%;microRNA芯片结果显示K562/A02与K562细胞之间有22种microRNA表达存在显著的差异(P<0.01),表达差异在2倍以上的有9种,其中miR-221、miR-155、miR-451在K562/A02细胞表达上调,而miR-98、miR-181a、let-7f、miR-424、let-7g和miR-563则表达下调.实时荧光定量RT-PCR进一步证实了上述结果,并显示miR-451、miR-155、miR-221、let-7f、miR-424在两种细胞中表达差异显著.结论 K562/A02与K562细胞存在microRNA表达差异,其中miR-451、miR-155和miR-221在K562/A02中表达显著上调,而let-7f、miR-424则显著下调,提示microRNA可能参与白血病耐药形成,差异表达的microRNA可能为逆转白血病耐药提供新的作用靶点.     

利用芯片技术筛选肝癌早期复发密切相关的microRNA

目的:应用miRNA芯片技术筛选肝癌早期复发密切相关的miRNA,为进一步深入探讨miRNA在介导肝癌高侵袭性及术后早期复发中的作用打下基础。方法:从本院肝癌标本库中选取10例肝癌患者进入本研究,其中早期复发组(术后第1年出现肝内复发病灶)和非早期复发组(术后2年以上未出现肝癌复发或转移)各5例,抽提总RNA并分离出小分子RNA进行Cy3荧光标记,将标记的小分子RNA与miRNA芯片进行杂交反应,分析差异表达的miRNA。结果:相对于非早期复发组,早期复发组肿瘤标本中有miR-602、miR-451、miR-144和miR-486-5p等4个miRNAs表达显著上调(上调倍数>2.0);有miR-551b、miR-96和miR-502-3p等3个miRNAs表达显著下调(下调倍数<0.5)。结论:筛选得到肝癌早期复发的miRNA差异表达谱,其可能与肝癌的早期复发发生发展有关。     

同种异体血液输注对创伤性失血患者血浆外泌体miRNA表达的影响

目的 通过观察异体输血对创伤性失血患者外泌体miRNA的差异表达,筛选出差异表达的外泌体miRNA,为后续靶基因和通路的研究奠定基础。方法 分别采集外伤患者在输异体血前和输血后外周血标本各3例,通过对血浆标本分离收获后的外泌体miRNA高通量测序,分析比较输血前后两组外泌体miRNA差异表达情况,同时以荧光定量PCR法进一步验证差异基因表达情况。结果 通过高通量测序分析,共测序到1570个miRNA存在差异表达,实验组比较对照组,上调的有1189个,下调的有381个,以倍数变化Foldchange≥2.0,P-value≤0.05作为差异miRNA筛选的阈值,筛选出显著变化的差异表达miRNA有14个,其中显著上调的miRNA有5个,分别为miR-499a-5p、miR-200a-3p、miR-372-3p、miR-novelchr12＿5583、miR-novel-chr22＿24253;显著下调的miRNA有9个,分别为miR-6852-5p、miR-452-5p、miR-1287-5p、miR-204-3p、miR-375-3p、miR-502-3p、miR-345-5p、miR...     

青少年肥胖非酒精性脂肪肝患者血清外泌体源性miRNA表达谱的初步研究

目的分析非酒精性脂肪肝(NAFLD)与单纯肥胖对照者血清外泌体微小RNA(miRNA)表达谱的差异,为筛选外泌体源性miRNA作为NAFLD早期诊断标记物提供依据。方法选择5例NAFLD患者(NAFLD组)和5例单纯肥胖患者(对照组),采集外周血血清,使用高通量测序方法测定外泌体源性miRNA表达谱,并通过实时荧光定量PCR验证部分差异性表达的miRNA,预测靶基因及功能分析。结果NAFLD组与对照组相比差异表达的外泌体源性miRNA共30种(P<0.05),当倍比值>2且P<0.05的差异性miRNA有9种,其中5种表达上调(miR-122-5p,miR-3591-3p,miR-335-5p,let-7g-3p和miR-27a-5p),4种表达下调(miR-6753-3p,miR-129-2-3p,miR-6760-5p,miR-6516);对miR-122-5p、miR-335-5p、miR-27a-5p进行实时荧光定量PCR,结果与测序结果一致。差异表达miRNA的功能分析结果提示涉及葡萄糖稳态、脂质代谢、肝脏发育等。结论NAFLD组血清外泌体源性miRNA表达谱与对照组有明显差异,miR-122-5p、miR-335-5p、miR-27a-5p可能参与了NAFLD的发病机制,可以作为NAFLD早期诊断的标记物。     

HBV相关肝脏纤维化患者血清miRNA差异表达谱建立及筛选

目的：分析并筛选HBV相关肝脏纤维化患者血清中差异表达miRNA。方法：选择2019年3月至2020年3月进入我院确诊为肝纤维化S2~S3期患者10例,以10例健康人作为对照,以血清作为研究样本。采用Illumina miRNA深度测序分析血清miRNA的表达。比较两组间差异表达的miRNA,对序列读数进行分析,以评估统计学意义。采用R平台进行分层聚类分析,以发现肝纤维化特异性表达的候选miRNA。采用qRT-PCR验证候选miRNA在各组中的表达,采用2-ΔΔCT分析miRNA的相对表达量。预测差异表达miRNA的靶基因,对靶基因进行GO分析。结果：在肝纤维化组和健康组之间,共筛选出78个表达具有显著性差异的miRNA。与健康组相比,肝纤维化组中表达上调的miRNA有30个,表达下调的miRNA有23个。其中,miR-505-3p、miR-197-3p、miR-500a-3p和miR-139-5p下调水平最高,miR-1273g-5p、miR-33a-5p 、miR-3960上调水平最高。选择表达变化最显著的miRNA进行qRT-PCR验证,结果与Illumina miRNA测序结果一致。结论：肝纤维化患者血清中miRNA的表达具有特异性,表达差异显著的miRNA有望成为新的肝纤维化临床诊断标志物。     

血小板miRNA的表达谱分析

目的:研究在体外常规储存1、3和5 d血小板微小RNA(mi RNA)的表达谱,探讨mi RNA在血小板储存期的变化。方法:留取来自无偿献血捐献者单采血小板20份,摇匀后等量混合,贮存于(22±2)℃恒温血小板振荡保存箱中。分别在d 1、3和5取样(分别命名为C₁、C₃和C₅),应用DNA纳米球(DNB)测序技术对血小板mi RNA组进行测序,采用每千百万碱基的转录本(TPM)算法标准化mi RNA的表达水平,组间mi RNA表达差异>2倍(P<0.001)认为表达差异具有统计学意义。采用实时荧光定量PCR方法验证mi RNA的表达。结果:通过DNB测序,分别获得C₁、C₃和C₅组688、730和679个表达的血小板mi RNA,聚类分析表明其表达谱发生明显变化。在C₁、C₃和C₅组中前20个高表达mi RNA的表达量约占各组mi RNA总表达量的4/5,各组前5位的mi RNA...     

乙型肝炎伴早期肝硬化microRNA表达谱及其诊断价值

目的探讨乙型肝炎伴早期肝硬化和乙型肝炎microRNA(miRNA)差异表达谱,寻找具有诊断价值的miRNA标志物。方法利用miRNA芯片技术检测7例乙型肝炎伴早期肝硬化患者和11例乙型肝炎患者肝组织中miRNA的表达水平。应用ROC曲线评价各miRNA的诊断价值。结果与单纯肝炎组织相比,伴早期肝硬化的肝炎组织中表达上调超过1.5倍的miRNA有miR-625-3p、miR-325、miR-596等5种,表达下调超过1.5倍的miRNA有miR-365、miR-362-5p、miR-139-5p等10种。ROC曲线分析结果表明,miR-139-5p诊断乙型肝炎伴早期肝硬化的特异性和敏感性最高。结论乙型肝炎伴早期肝硬化组织和乙型肝炎组织相比有其特异的miRNA表达谱,miR-139-5p可能是诊断乙型肝炎伴早期肝硬化的一个标志物。     

不同临床分期卵巢浆液性癌的miRNA表达谱分析及其与临床预后的关系

目的：筛选在卵巢癌演进过程中起重要作用的 microRNA（miRNA）,检测关键 miRNA 与临床病理及预后的联系,找出与卵巢浆液性癌预后相关的 miRNA。方法 miRNA 芯片技术分别检测6例Ⅰ期浆液性癌,4例Ⅲ期浆液性癌的 miRNA 表达谱差异。统计分析,从中挑选4个 miRNA,miR-510、miR-509-5p、miR-508-3p、miR-483-5p,采用实时定量PCR方法检测其在16例Ⅰ期浆液性癌、35例Ⅲ期浆液性癌中的表达,对比分析。收集验证组患者的临床病理及预后资料。将miRNA实时定量PCR结果分为高表达组和低表达组,分别统计各miRNA的表达与临床病理参数及预后的关系。结果 miRNA芯片技术分析了768个miRNA在Ⅰ期和Ⅲ期的表达谱,其中26个miRNA在两组中的表达具有显著差异（P＜0.05）,差别在两倍以上。对比Ⅰ期,Ⅲ期中6个miRNA上调,20个miRNA下调。实时定量PCR结果与miRNA芯片结果一致,显示miR-510、miR-509-5p、miR-508-3p在Ⅰ期卵巢癌标本中显著高于Ⅲ期浆液性癌,miR-483在Ⅰ期中表达显著低于Ⅲ期浆液性卵巢癌。但4个miRNA的表达与其他临床病理参数无关。生存分析发现miR-510、miR-509-5p二者与预后有关,高表达组的预后显著优于低表达组。结论 miRNA参与卵巢浆液性癌的发展,miR-510及miR-509-5p可能在卵巢癌的侵袭和转移中起作用,有望成为预测卵巢癌预后的分子标记物。     

A miRNA Signature of Prion Induced Neurodegeneration

MicroRNAs (miRNAs) are small, non-coding RNA molecules which are emerging as key regulators of numerous cellular processes. Compelling evidence links miRNAs to the control of neuronal development and differentiation, however, little is known about their role in neurodegeneration. We used microarrays and RT-PCR to profile miRNA expression changes in the brains of mice infected with mouse-adapted scrapie. We determined 15 miRNAs were de-regulated during the disease processes; miR-342-3p, miR-320, let-7b, miR-328, miR-128, miR-139-5p and miR-146a were over 2.5 fold up-regulated and miR-338-3p and miR-337-3p over 2.5 fold down-regulated. Only one of these miRNAs, miR-128, has previously been shown to be de-regulated in neurodegenerative disease. De-regulation of a unique subset of miRNAs suggests a conserved, disease-specific pattern of differentially expressed miRNAs is associated with prion–induced neurodegeneration. Computational analysis predicted numerous potential gene targets of these miRNAs, including 119 genes previously determined to be also de-regulated in mouse scrapie. We used a co-ordinated approach to integrate miRNA and mRNA profiling, bioinformatic predictions and biochemical validation to determine miRNA regulated processes and genes potentially involved in disease progression. In particular, a correlation between miRNA expression and putative gene targets involved in intracellular protein-degradation pathways and signaling pathways related to cell death, synapse function and neurogenesis was identified.     

Identification of aberrantly expressed of serum microRNAs in patients with hormone-induced non-traumatic osteonecrosis of the femoral head

ObjectiveThe non-translation RNA-microRNA (miRNA) has been demonstrated to correlate to various disease occurrence in body. Serum miRNA was gradually considered as molecular markers for disease diagnosis. This study was designed to analyze differential serum miRNAs level in hormone-induced non-traumatic osteonecrosis of the femoral head (hormone-NOFH) patients.MethodsWe selected 30 patients with hormone-NOFH as case group, and 30 healthy volunteers were recruited as control group. miRCURYTM LNA miRNA chip and quantitative RT-PCR were used to examine differential miRNAs expression. Correlation assay was performed between miRNAs and NOFH trait.ResultsWe found that 9 miRNAs were upregulated while 3 miRNAs were downregulated in hormone-TOFH patient serum by result of miRNA chip. QRT-PCR assay revealed that the level of miR-423-5p was significantly increased and miR-10a-5p was significantly decreased. Using Spearman correlation analysis, we observed that miR-423-5p serum level is positive association to FHC levels whereas miR-10a-5p has no association with FHC levels. Furthermore, miR-423-5p is negatively correlated to its downstream molecule-adiponectin.ConclusionWe report a miRNA profile of hormone-NOFH and provide a new perspective to understand this intricate disease. This novel information suggests the potential roles of miR-423-5p in the diagnosis, prognosis biomarkers, or therapy targets of hormone-NOFH.     

MicroRNA-199a-3p is downregulated in human osteosarcoma and regulates cell proliferation and migration

microRNAs (miRNA, miR) play an important role in cancer cell growth and migration; however, the potential roles of miRNAs in osteosarcoma remain largely uncharacterized. By applying a miRNA microarray platform and unsupervised hierarchical clustering analysis, we found that several miRNAs have altered expression levels in osteosarcoma cell lines and tumor tissues when compared with normal human osteoblasts. Three miRNAs, miR-199a-3p, miR-127-3p, and miR-376c, were significantly decreased in osteosarcoma cell lines, whereas miR-151-3p and miR-191 were increased in osteosarcoma cell lines in comparison with osteoblasts. Transfection of precursor miR-199a-3p into osteosarcoma cell lines significantly decreased cell growth and migration, thus indicating that the inhibition effect is associated with an increase in the G(1)-phase and a decrease of the S-phase cell population. In addition, we observed decreased mTOR and Stat3 expression in miR-199a-3p transfected cells. This study provides new insights for miRNAs in osteosarcoma and suggests that miR-199a-3p may play a functional role in osteosarcoma cell growth and proliferation. Restoring miR-199a-3p's function may provide therapeutic benefits in osteosarcoma.     

Identification of plasma miR-106a-5p and miR-30a-5p as potential biomarkers for mesangial proliferative glomerulonephritis

BackgroundAlthough stable microRNAs (miRNAs) are present in human peripheral blood and have been considered as novel biomarkers for various diseases. But there is little research about miRNAs as biomarkers of mesangial proliferative glomerulonephritis (MsPGN). This study aimed to identify whether there exist disordered circulating miRNAs that can function as biomarkers for MsPGN disease activity.MethodsThe candidate miRNAs were validated in 70 MsPGN patients and 70 healthy controls by quantitative real-time PCR (RT-qPCR). The specificity and sensitivity of the miRNA panel was assessed by receiver operating characteristic (ROC) curves. In addition, the candidate miRNA levels were measured in the different MsPGN progression and in the membranous nephropathy (MN) patients and the hypothetical role of the candidate miRNA on mesangial cell proliferation was analysed. Situ hybridization was performed to examine the candidate miRNA levels in the glomerulus.ResultsThese results showed that miR-106a-5p and miR-30a-5p were highly expressed in MsPGN patients compared with healthy controls and could discriminate MsPGN from healthy controls with an area under the ROC curve (AUC) of 0.93. In addition, the two miRNAs were not only higher in moderate and severe MsPGN patients, but could distinguish MsPGN from MN. We also observed a decreased expression in MsPGN regression group after treatment. Plasma miR-106a-5p level was positively correlated with estimated glomerular filtration rate (eGFR). Furthermore, the two miRNAs were highly expressed in MsPGN glomerulus and their overexpression could prompt mesangial cell proliferation.ConclusionPlasma miR-30a-5p and miR-106a-5p can serve as novel and potential diagnostic biomarkers for MsPGN.     

Expression profile of plasma microRNAs in nonsyndromic cleft lip and their clinical significance as biomarkers

ObjectiveThe aim of this study was to determine the expression profile of plasma microRNAs in nonsyndromic cleft lip (NSCL) and their clinical significance as biomarkers.MethodsAgilent human miRNA microarray chips were used to analyze three NSCL plasma samples (mixed as CL group) and three normal plasma samples (mixed as Control group). Six selected plasma miRNAs were validated using qRT-PCR between another 13 CL and 11 healthy children. The receiver operating characteristic (ROC) curve analysis was applied for three elevated miRNAs, miR-16-2-3p, miR-365a-3p and miR-877-5p. Their target genes were further assessed using gene ontology and pathway analysis.ResultsThe plasma miRNA differentially expressed (fold change ≥2) amounted to 305. In particular, it had been validated that miR-16-2-3p, miR-365a-3p and miR-877-5p were elevated in NSCL plasma samples. ROC curve analysis revealed that each microRNA was able to significantly discriminate NSCL subjects from normal controls. Gene ontology and pathway analysis revealed that many processes over-represented in CL are related to system development process, regulation of nitrogen compound metabolic process, FoxO signaling pathway and the ErbB signaling pathway.ConclusionOur study demonstrated that plasma miR-16-2-3p, miR-365a-3p and miR-877-5p might become biomarkers to diagnose NSCL and dysregulation of these miRNAs might be involved in the progression of NSCL.     

miR-203a-3p 靶向GLS1 调控HCC 细胞增殖、迁移、侵袭的机制研究

目的　探究微小核糖核酸（microRNAs, miRNA, miR）-203a-3p 对肝细胞癌（hepatocellular carcinoma,HCC）细胞增殖、迁移、侵袭的影响及其潜在分子机制。方法　采用实时荧光定量PCR（quantitative real-time PCR,qRTPCR）检测HCC 细胞、人正常肝细胞以及临床HCC 组织中miR-203a-3p 相对表达;采用细胞增殖实验、细胞划痕实验和Transwell 实验分别检测miR-203a-3p 对HCC 细胞增殖、迁移、侵袭的影响;生物信息学网站预测miR-203a-3p 的潜在靶基因（GLS1）,双荧光素酶实验进行验证;探究HCC 细胞对谷氨酰胺的依赖性及抑制谷氨酰胺酶1(glutaminase 1,GLS1) 对HCC 细胞增殖、迁移、侵袭的影响;蛋白免疫印迹（Western blot）实验检测Wnt/β-catenin 信号通路关键蛋白β-catenin,p-GSK-3β 和c-Myc 表达。结果　HCC 癌组织中miR-203a-3p（0.32±0.07）表达明显低于癌旁正常组织（1.02±0.03）,差异有统计学意义（t ＝ 41.105,P ＜ 0.001）;HCC 细胞HepG2（0.34±0.05）,HCCLM3（0.58±0.06）,Huh7（0.43±0.05）,Hep3B（0.29±0.04）中miR-203a-3p 相对表达水平明显低于人正常肝细胞LO2（1.01±0.02）中miR-203a-3p 表达,差异有统计学意义（F ＝ 119.080,P ＜ 0.001）。与Blank 组相比,miR-203a-3p 过表达组HCC细胞增殖（0.61±0.05 vs 1.24±0.06）, 迁移率（21.43%±2.01% vs 60.22%±3.14%） 及侵袭能力（76.54±13.56 vs221.06±16.54）均明显降低,差异有统计学意义（t ＝ 14.849,13.900,10.562,均P ＜ 0.001）。GLS1 是miR-203a-3p的靶基因,miR-203a-3p 靶向负调控GLS1 表达。HCC 细胞中GLS1 高表达呈现高酶活性,HCC 细胞对谷氨酰胺存在明显依赖性。GLS1 抑制组α-KG,谷氨酸水平均较Blank 组和siRNA-NC 组明显降低,差异有统计学意义（F ＝ 64.754,35.627,均P ＜ 0.001）。GLS1 抑制组细胞增殖（0.59±0.04）、迁移率（30.15%±1.02%）和侵袭能力（69.59±15.74）较Blank 组明显降低（1.29±0.07,59.67%±1.45%,202.14±13.52）,差异均有统计学意义（t ＝ 16.499,16.278,11.215,均P ＜ 0.001）。miR-203a-3p 过表达和GLS1 表达抑制明显抑制了Wnt/β-catenin 信号通路关键蛋白β-catenin,p-GSK-3β 和c-Myc 的表达,差异均有统计学意义（t ＝ 11.129 ～ 28.213,均P ＜ 0.001）。转染GLS1 可逆转miR-203a-3p 对HCC 细胞生物学行为及Wnt/β-catenin 信号通路关键蛋白表达的抑制作用。结论　HCC 中miR-203a-3p 显著低表达,其过表达能够抑制HCC 细胞的增殖、迁移和侵袭,可能与GLS1 调控谷氨酰胺代谢及miR-203a-3p 靶向GLS1调控Wnt/β-catenin 信号通路活性有关。