应用基因芯片检测喉鳞状细胞癌甲醛固定石蜡包埋组织microRNA表达谱

目的 建立以甲醛固定石蜡包埋组织为材料、基于基因芯片技术的microRNA(miRNA)表达谱的分析方法 ;筛选与喉鳞状细胞癌(简称喉癌)生物学特征密切相关的差异表达miRNA.方法 从喉癌甲醛固定石蜡包埋组织中制备总RNA,经质量鉴定后进行荧光标记.采用Agilent公司的容纳723条人类miRNA探针的基因芯片完成杂交实验,以获得喉癌的miRNA表达谱.以GeneSpring GX和R-Project软件处理分析基因芯片实验数据,筛选与喉癌转移相关的差异表达miRNA.结果 从24例甲醛固定石蜡包埋组织标本中获得了符合基因芯片实验质量标准的RNA样品,并完成了基因芯片杂交及数据分析.从中共鉴定到319个miRNA,有96个miRNA在24例喉癌中均有表达,其中与淋巴结转移密切相关的(检错率<0.05)差异表达miRNA有5个,分别为miR-23a* 、miR-28-5p、miR-15a、miR-16和miR-425.结论 甲醛固定石蜡包埋组织可以提供符合基因芯片分析质量要求的miRNA,是研究miRNA的重要样品资源.从喉癌的miRNA表达谱中筛选出的转移相关差异表达miRNA(miR-23a*、miR-28-5p、miR-15a、miR-16和miR-425)有可能成为评估喉癌转移风险的新型分子标志.     

应用基因芯片检测喉鳞状细胞癌甲醛固定石蜡包埋组织microRNA表达谱

目的 建立以甲醛固定石蜡包埋组织为材料、基于基因芯片技术的microRNA(miRNA)表达谱的分析方法 ;筛选与喉鳞状细胞癌(简称喉癌)生物学特征密切相关的差异表达miRNA.方法 从喉癌甲醛固定石蜡包埋组织中制备总RNA,经质量鉴定后进行荧光标记.采用Agilent公司的容纳723条人类miRNA探针的基因芯片完成杂交实验,以获得喉癌的miRNA表达谱.以GeneSpring GX和R-Project软件处理分析基因芯片实验数据,筛选与喉癌转移相关的差异表达miRNA.结果 从24例甲醛固定石蜡包埋组织标本中获得了符合基因芯片实验质量标准的RNA样品,并完成了基因芯片杂交及数据分析.从中共鉴定到319个miRNA,有96个miRNA在24例喉癌中均有表达,其中与淋巴结转移密切相关的(检错率<0.05)差异表达miRNA有5个,分别为miR-23a* 、miR-28-5p、miR-15a、miR-16和miR-425.结论 甲醛固定石蜡包埋组织可以提供符合基因芯片分析质量要求的miRNA,是研究miRNA的重要样品资源.从喉癌的miRNA表达谱中筛选出的转移相关差异表达miRNA(miR-23a*、miR-28-5p、miR-15a、miR-16和miR-425)有可能成为评估喉癌转移风险的新型分子标志.     

应用基因芯片检测喉鳞状细胞癌甲醛固定石蜡包埋组织microRNA表达谱

目的 建立以甲醛固定石蜡包埋组织为材料、基于基因芯片技术的microRNA(miRNA)表达谱的分析方法 ;筛选与喉鳞状细胞癌(简称喉癌)生物学特征密切相关的差异表达miRNA.方法 从喉癌甲醛固定石蜡包埋组织中制备总RNA,经质量鉴定后进行荧光标记.采用Agilent公司的容纳723条人类miRNA探针的基因芯片完成杂交实验,以获得喉癌的miRNA表达谱.以GeneSpring GX和R-Project软件处理分析基因芯片实验数据,筛选与喉癌转移相关的差异表达miRNA.结果 从24例甲醛固定石蜡包埋组织标本中获得了符合基因芯片实验质量标准的RNA样品,并完成了基因芯片杂交及数据分析.从中共鉴定到319个miRNA,有96个miRNA在24例喉癌中均有表达,其中与淋巴结转移密切相关的(检错率<0.05)差异表达miRNA有5个,分别为miR-23a* 、miR-28-5p、miR-15a、miR-16和miR-425.结论 甲醛固定石蜡包埋组织可以提供符合基因芯片分析质量要求的miRNA,是研究miRNA的重要样品资源.从喉癌的miRNA表达谱中筛选出的转移相关差异表达miRNA(miR-23a*、miR-28-5p、miR-15a、miR-16和miR-425)有可能成为评估喉癌转移风险的新型分子标志.     

miR-133a-3p 通过抑制氧化还原因子1 抑制肝癌细胞恶性生物学行为

目的:通过多种实验途径探讨miR-133a-3p通过调节氧化还原因子1(Ref-1)对肝癌细胞恶性生物学行为的影响。方法:收集2017年2月～2018年12月来本院就诊的肝癌手术患者的癌组织和癌旁相邻正常组织标本,用qRT-PCR检测miR-133a-3p在癌组织和癌旁相邻正常组织中以及在肝癌细胞系HepG2、Huh-7、SK-Hep1、SMMC-7721和肝正常细胞Hep-3B中的表达;构建miR-133a-3p-mimics(miR-mimics组、miR-NC转染质粒组和正常对照组(Control),qRT-PCR检测转染前后miR-133a-3p在HepG2中的表达;CCK-8和克隆形成实验检测HepG2细胞转染前后增殖能力变化;细胞划痕和Transwell实验分别检测转染前后HepG2细胞的迁移和侵袭能力变化;RNA转录组测序检测HepG2细胞转染前后转录组RNA表达差异并作通路富集分析;qRT-PCR检测筛选RNA-seq中RNA表达差异较大的基因;qRT-PCR和Western blot检测Ref-1在HepG2细胞转染前后中的表达。免疫组化和qRT-PCR分别检测Ref-1在肝癌组织和肝癌细胞系中表达;最后HepG2细胞同时转染了miR-mimics和Ref-1 miR-inhibitors,进行联合干预,随后CCK-8、细胞划痕和Transwell分别检测了联合干预后细胞增殖、迁移和侵袭能力变化。结果:miR-133a-3p在肝癌患者癌组织中的表达显著低于癌旁组织,同时其在肝癌细胞HepG2中的表达最低;qRT-PCR结果表明miR-mimics可有效促进miR-133a-3p在HepG2中的表达;CCK-8和克隆形成实验结果显示miR-133a-3p过表达后可以显著抑制HepG2细胞的增殖、迁移和侵袭等恶性生物学行为;RNA-seq结果显示HepG2转染前后Ref-1的表达差异最大;qRT-PCR和Western blot结果显示HepG2转染成功后,Ref-1表达随miR-133a-3p的过表达而降低。免疫组化和qRT-PCR结果显示Ref-1在肝癌组织和肝癌细胞系中的表达均显著高于阴性对照组;联合干预后HepG2细胞的增殖、迁移和侵袭等恶性生物学抑制作用更加强烈。结论:miR-133a-3p可能通过抑制Ref-1表达从而抑制肝癌细胞的增殖、迁移和侵袭等恶性生物学行为。     

基质细胞衍生因子1诱导骨关节炎软骨细胞的miRNA表达谱分析

背景:骨关节炎是多因素介导的复杂疾病,发病机制尚待挖掘,随着基因层面的不断深入研究,非编码核糖核酸调控作用显现并得以研究。通过检测软骨细胞退变miRNA表达谱变化有助于更好地理解骨软骨细胞退变的分子机制,并为骨关节炎的诊断和治疗开辟新的途径。目的:探讨基质细胞衍生因子1刺激骨关节炎软骨细胞后miRNA表达谱变化,为基因层面延缓关节软骨退变提供实验基础。方法:对10例膝关节骨关节炎患者于全膝关节置换手术过程中截骨后残留的软骨组织进行软骨细胞培养,随机分为实验组与对照组,两组细胞培养基为含体积分数10%胎牛血清及青链霉素双抗的高糖DMEM培养基。实验组培养基中另外加入100μg/L基质细胞衍生因子1,对照组不做任何处理。两组软骨细胞培养48 h后,进行下一步实验用于miRNA芯片筛选和实时定量PCR验证。软骨组织标本取材前皆告知患者并征得同意,该研究符合《医疗机构管理条例》相关要求,获得昆明医科大学第一附属医院伦理委员会批准。结果与结论:miRNA基因芯片初筛共有84个miRNAs发生变化,其中70个miRNAs上调,14个miRNAs下调。通过基因芯片筛选差异变化的miRNA,对变化显著的7个miRNA(miR-146a-5p、miR-124-3p、miR-130a-3p、miR-185-5p、miR-221-3p、miR-126-3p)进行qRT-PCR实验验证,其中miR-146a-5p、miR-124-3p及miR-126-3p的qRT-PCR结果与基因芯片结果一致。结果表明,基质细胞衍生因子1刺激骨关节炎软骨细胞后循环miRNA表达谱出现明显变化,miR-146a-5p、miR-124-3p及miR-126-3p可能与基质细胞衍生因子1刺激骨关节炎SDF-1/CXCR4信号通路反应有关。     

miR-18a通过靶向调节SEMA5A影响喉癌Hep-2细胞的增殖与迁移

目的探讨miR-18a对喉癌HEP-2细胞增殖及迁移能力的影响及可能机制。方法 Real-time PCR法检测喉癌组织与癌旁组织miR-124的表达,免疫组织化学方法检测SEMA5A蛋白的表达。Lipofectamine2000将miR-18a抑制剂与miR-18a模拟物分别转染喉癌HEP-2细胞,real-time PCR法验证转染效率,采用CCK8法检测miR-18a对喉癌HEP-2细胞增殖的影响,采用Transwell迁移实验检测转染后HEP-2细胞的迁移能力变化。Real-time PCR与Western blot实验分别检测转染后SEMA5A mRNA和蛋白表达的变化。结果 miR-18a在喉癌组织中的表达明显高于癌旁正常组织(P0.01),但SEMA5A蛋白在喉癌组织中的表达明显低于癌旁正常组织(P0.01)。miR-18a抑制剂或miR-18a模拟物转染后,喉癌HEP-2细胞miR-18a的表达显著降低或升高,转染成功。转染miR-18a抑制剂能够显著降低喉癌HEP-2细胞增殖及迁移能力,并上调喉癌HEP-2细胞SEMA5A蛋白的表达;转染miR-18a模拟物后,作用则相反。结论 miR-18a在喉癌组织中表达上调,靶向调节SEMA5A的表达可能是其促进喉癌HEP-2细胞增殖和迁移的机制之一。     

miR-181d靶向LCRG1调控喉癌细胞Hep2增殖与迁移的机制

目的探讨miR-181d对LCRG1的调控作用及miR-181d对喉癌Hep2细胞增殖的影响。方法利用基因芯片和RTPCR技术检测miR-181d在喉癌组织和癌旁组织中的表达;生物信息学预测喉癌候选抑瘤基因LCRG1的靶标miRNAs;构建LCRG1 3'UTR荧光素酶载体,双荧光素酶检测系统测定其荧光素酶活性;将miR-181d mimic和miR-181d inhibitor瞬转入Hep2细胞,RT-PCR结果验证miR-181d的表达后,再用Western blot法检测各组中LCRG1蛋白的表达;采用MTT实验、迁移、侵袭及流式细胞术等实验,观察转染组与对照组细胞的增殖。结果 miR-181d在喉癌组织中的表达量较癌旁组织明显升高(P=0. 046 5);miR-181d可能靶向结合LCRG1,且LCRG1蛋白表达与miR-181d表达呈负相关;下调miR-181d能降低Hep2细胞的增殖、迁移、侵袭能力,并使细胞周期主要阻滞于G1期。结论在Hep2细胞中miR-181d可以结合LCRG1 3'UTR,负性调控LCRG1的表达并使Hep2细胞增殖、迁移和侵袭能力增强。     

MiRNA在E3泛素连接酶Cbl-b抑制CD4~+T细胞活化中的作用研究

本研究探讨miRNA在Cbl-b抑制CD4~+T细胞活化中的作用机制。采用miRNA深度测序的方法检测WT CD4~+T细胞、Cbl~(-b-)/-CD4~+T细胞、抗CD3抗体活化的WT CD4~+T细胞和抗CD3抗体活化的Cbl-b~(-/-)CD4~+T细胞中miRNA的表达谱。结果显示,miR-125b-2-3p、miR-125b-5p、miR-99a-5p和miR-99a-3p同时在Cbl-b-/-CD4~+T细胞和抗CD3抗体活化的Cbl-b~(-/-)CD4~+T细胞中显著高表达。运用miRWalk2.0预测差异表达miRNA的靶基因并用GO和KEGG分析差异表达的miRNA的可能作用机制。结果显示差异表达的miRNA可能通过MAPK等信号通路来影响Cbl-b抑制CD4~+T细胞的活化。综上所述,Cbl-b可能通过miR-125b-2-3p、miR-125b-5p、miR-99a-5p和miR-99a-3p等miRNA调控MAPK等信号通路来抑制CD4~+T细胞的活化。     

miR-99a-5p靶向SLC44A1对肺癌细胞系A549增殖的影响

目的 探讨miR-99a-5p通过靶点SLC44A1对肺腺癌(LUAD)细胞系增殖的抑制作用及可能机制.方法 从基因表达综合数据库(GEO)中检索并筛选GPL18058的microRNA(miRNA)表达阵列,筛选出肺癌与正常组织差异表达的miR-99a-5p后,通过Target Scan Human数据库预测其下游靶点SLC44A1,并利用UALCAN分析SLC44A1在肺癌组织中的表达情况和LUAD预后关系.利用实时荧光定量PCR(qRT-PCR)检测肺腺癌细胞系miR-99a-5p和SLC44A1的表达水平.在A549细胞中转染miR-99a-5p模拟物,通过CCK-8试验、克隆形成实验检测A549的增殖情况;qRT-PCR和Western blot检测SLC44A1的表达.在A549细胞中过表达SLC44A1,评估其对肺癌调节中的miR-99a-5p的选择性作用.结果 在LUAD组织和细胞系中,miR-99a-5p的表达异常下调,过度异位表达的miR-99a-5p抑制A549细胞的增殖(P＜0.05).在LUAD组织和细胞系的基因和蛋白质水平上,miR-99a-5p负性调控SLC44A1(P＜0.05).SLC44A1过度表达有效地逆转了miR-99a-5p在体外对A549细胞增殖的抑制作用.SLC44A1的低表达有利于患者生存率的提高(P＜0.05).结论 miR-99a-5p抑制LUAD中A549细胞系的增殖,并通过负性调控SLC44A1发挥作用.     

卵巢癌患者miR-497、miR-125a-5p的表达及与其临床特征和生存率的关系

目的:分析卵巢癌患者癌组织中微小RNA-497(miR-497)和微小RNA-125a-5p(miR-125a-5p)的表达情况及其临床意义.方法:选取2018-06—2019-12在本院手术治疗的96例卵巢癌患者作为研究对象,将手术切除的卵巢癌组织作为试验组,癌旁(>2cm)正常组织为对照组.采用实时荧光定量PCR(...     

Gene and microRNA expression reveals sensitivity to paclitaxel in laryngeal cancer cell line

Paclitaxel is a widely used chemotherapy drug for advanced laryngeal cancer patients. However, the fact that there are 20-40% of advanced laryngeal cancer patients do not response to paclitaxel makes it necessary to figure out potential biomarkers for paclitaxel sensitivity prediction. In this work, Hep2, a laryngeal cancer cell line, untreated or treated with lower dose of paclitaxel for 24 h, was applied to DNA microarray chips for gene and miR expression profile analysis. Expression of eight genes altered significantly following paclitaxel treatment, which was further validated by quantitative real-time PCR. Four up-regulated genes were ID2, BMP4, CCL4 and ACTG2, in which ID2 and BMP4 were implicated to be involved in several drugs sensitivity. While the down-regulated four genes, MAPK4, FASN, INSIG1 and SCD, were mainly linked to the endoplasmic reticulum and fatty acid biosynthesis, these two cell processes that are associated with drug sensitivity by increasing evidences. After paclitaxel treatment, expression of 49 miRs was significantly altered. Within these miRs, the most markedly expression-changed were miR-31-star, miR-1264, miR-3150b-5p and miR-210. While the miRs putatively modulated the mRNA expression of the most significantly expression-altered genes were miR-1264, miR-130a, miR-27b, miR-195, miR-1291, miR-214, miR-1277 and miR-1265, which were obtained by miR target prediction and miRNA target correlation. Collectively, our study might provide potential biomarkers for paclitaxel sensitivity prediction and drug resistance targets in laryngeal cancer patients.     

miR-125a-5p通过GSK-3β/Snail信号通路抑制乳腺癌细胞的上皮-间充质转化

目的:探讨微小RNA-125a-5p(miR-125a-5p)通过GSK-3β/Snail信号通路对乳腺癌细胞上皮-间充质转化(EMT)的影响。方法:RT-qPCR检测人正常乳腺上皮细胞与乳腺癌细胞中miR-125a-5p的表达量,同时检测miR-125a-5p质粒在人乳腺癌MDA-MB-231细胞中的转染效率;趋化运动实验与Transwell侵袭实验检测趋化运动能力和侵袭能力;Western blot检测EMT相关标志物的变化,同时检测磷酸化糖原合成酶激酶3β(p-GSK-3β)的蛋白水平及Snail的转核情况。结果:乳腺癌细胞中miR-125a-5p的表达量明显低于人正常乳腺上皮细胞(P0.05);miR-125a-5p在转染miR-125a-5p质粒的MDA-MB-231细胞中表达水平明显增高;MDA-MB-231细胞的趋化运动能力在表皮生长因子(EGF)浓度为10μg/L时最强;在EGF刺激下,与MDA-MB-231/NC细胞组相比,MDAMB-231/miR-125a-5p细胞组的侵袭能力明显降低,上皮钙黏着蛋白(E-cadherin)表达量升高,波形蛋白(vimentin)和p-GSK-3β的蛋白水平明显降低,同时Snail转核受到明显抑制;与MDA-MB-231/miR-125a-5p+Con细胞组相比,MDA-MB-231/miR-125a-5p+GAB2细胞组的侵袭能力明显增强,E-cadherin表达量降低,vimentin和p-GSK-3β的蛋白水平明显升高,同时促进Snail转核。结论:miR-125a-5p可通过GSK-3β/Snail信号通路抑制乳腺癌细胞的EMT,进而抑制乳腺癌细胞的侵袭能力。     

MiR-34a-5p and miR-452-5p: The Novel Regulators of Pancreatic Endocrine Dysfunction in Diabetic Zucker Rats?

Objective: The pancreatic endocrinal system dominates the regulation of blood glucose levels in vivo, and the dysfunction of pancreatic endocrine β-cells is a major cause of the occurrence and development of Type 2 diabetes (T2D). Although microRNA (miRNA) have been found to be key regulators of pancreatic β-cells proliferation, differentiation and apoptosis, the underlying mechanism remains enigmatic. The aim of this study was to identify several novel miRNAs which might be involved in the etiopathogenesis of diabetic β-cells dysfunction.Methods: The miRNA expression profiles in the pancreas of high-fat diet (HFD) fed Zucker diabetic fatty (ZDF) rats and Zucker lean (ZL) rats feed with normal-fat diet (NFD) were detected by using miRNA microarray chip, and individually verified the most significant factors by quantitative real-time polymerase chain reaction (qRT-PCR) assay. The Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were used to predict the target genes related to each of the identified miRNAs and the functions of these target genes in different metabolic signaling pathways.Results: Compared with the ZL rats, a total of 24 differentially expressed miRNAs were detected in ZDF rats. Among which miR-34a-5p and miR-452-5p were the most significantly up-regulated and down-regulated respectively. These miRNAs have not been reported in rats'' pancreas before. By GO and KEGG enrichment analyses, we found that miR-34a-5p could negatively regulate pancreatic β-cell proliferation through the involvement of Wnt signaling pathway. In addition, it was also found to regulate insulin secretion through the insulin signaling pathway to modulate blood glucose levels. At the same time, miR-452-5p was found to positively regulate the activity of the key rate-limiting enzyme branched-chain α-keto acid dehydrogenase-β (BCKDHB) in the catabolism of branched chain amino acids (BCAA), leading to mitochondrial dysfunction in pancreatic β-cells.Conclusions: miR-34a-5p and miR-452-5p were identified as the novel regulators of pancreatic endocrine dysfunction. These miRNAs might have the potential to be utilized as the new predictive biomarkers for the diagnosis of the occurrence and development of T2D, as well as the therapeutic targets for T2D treatment.     

头颈部鳞状细胞癌预后相关的miRNAs的生物信息学分析

目的 利用癌症基因组图谱（TCGA）数据库微小核糖核酸（miRNAs）表达谱数据分析头颈部鳞状细胞癌（HNSCC）与癌旁正常组织间差异表达的miRNAs,结合临床信息寻找与HNSCC预后相关的miRNAs。方法 从TCGA中下载miRNAs表达数据,包括39例HNSCC患者和39个肿瘤邻近正常组织样本筛选差异表达的miRNAs,应用481例HNSCC患者的miRNAs表达谱和临床信息来评估找到的差异表达miRNAs的预后作用。结果 共筛选出114个差异表达的miRNAs,包括60个上调和54个下调的miRNAs。Kaplan-Meier生存分析显示miR-4652-5p和miR-99a-3p与HNSCC患者预后相关,单因素和多因素Cox回归分析显示,miR-4652-5p和miR-99a-3p是HNSCC的重要预后因素。结论 miR-4652-5p和miR-99a-3p与HNSCC患者预后相关,但miR-4652-5p和miR-99a-3p在头颈鳞状细胞癌发生发展中的分子机制仍需更全面的基础和临床研究进行探讨。     

miR-130b-3p有望作为人膀胱癌的标志物

目的进一步了解miRNA在膀胱癌中的潜在机制。方法芯片分析4对人膀胱癌组织和相邻正常组织中的miRNA的表达。并用RT-q PCR来验证两个最上调的miRNA及其靶基因的表达是否符合miRNA/mRNA芯片结果。通过相关性分析和双荧光素酶报告实验推断并验证miR-130b-3p可以靶向PTEN。应用CCK8、EDU、流式细胞术、划痕、Transwell和细胞骨架等实验证明miR-130b可以影响膀胱癌细胞的增殖、凋亡、迁移和侵袭。用Western blot检测PI3K/AKT和整合素β1/FAK信号通路的关键靶蛋白。结果人膀胱癌中miR-130b-3p表达高于癌旁且与PTEN表达呈负相关。miR-130b-3p可下调PTEN表达,导致PI3K/AKT和整合素β1/FAK信号通路的激活,且与膀胱癌EJ细胞的增殖、迁移和侵袭相关。细胞转染miR-130b-3p抑制剂时,可以重排细胞骨架。结论本结果揭示miR-130b/PTEN有望用于人膀胱癌诊断和治疗的标志物。     

Differential Expression Profiling and Functional Analysis of microRNAs through Stage I-III Papillary Thyroid Carcinoma

Objective: To elucidate the mechanisms undergoing the pathogenesis of PTC, this study try to find stage specific microRNAs (miRNAs) using microarray chip in stage I, II and III papillary thyroid carcinoma (PTC) tissues as well predict miRNAs binding target genes and their molecular functions.Methods: PTC specimens of stage I, II, and III and their paired adjacent non-tumor tissue (one patient for each stage) were collected. The expressions of miRNAs were examined using miRNA microarray chip. The most significant changed miRNAs from microarray were verified by using quantitative RT-PCR. The Potential miRNAs regulating target genes and their preliminary biological functions were forecasted with variety function prediction software.Results: Ten miRNAs exhibited sequential up regulation expression profiles and five miRNAs performed sequential down regulation throughout stage I to III (p<0.05). After normalization, Fifteen miRNAs showed significant different compared to adjacent non-tumor tissues (p<0.05). Among of them, the most significant up regulation and down regulation miRNAs were miR-146b-5p and miR-335, respectively. Both of them were verified with qRT-PCR. 34 target genes for miR-146-5p and 36 target genes for miR-335 was predicted.Conclusion: MicroRNA profile assay successfully detected a branch of differential expression miRNAs between PTC and normal tissue. Some of them also showed stage specific. Biological function analysis showed that target genes were involved in five aspects including cell proliferation, differentiation, apoptosis, cycle, and signaling transduction pathway, suggesting the regulatory role of abnormal expression of critical miRNAs in the pathogenesis of PTC.