T淋巴细胞活化相关的microRNA的筛选、靶分子的预测、构建和鉴定

目的: 筛选T细胞活化相关的microRNA并预测其靶分子,通过双荧光素酶实验鉴定这些microRNA的靶分子方法: 利用Exiqon miRNA基因表达谱芯片,以活化的Jurkat细胞(用CD3抗体和CD28抗体双信号活化)为实验组,未活化Jurkat细胞为对照组,分析了二者miRNA表达谱的差异,找出表达水平显著改变的miRNA,并通过实时定量PCR的方法对芯片结果进行验证;构建miRNA的真核表达载体;利用生物信息学方法预测miRNA的靶分子,构建含靶分子3′UTR的荧光素酶报告基因质粒;分别将miRNA基因真核表达质粒与含有靶分子的荧光素酶报告基因质粒共转染HEK293细胞,进行荧光素酶实验来鉴定miRNA的靶分子结果: Exiqon miRNA基因表达谱芯片显示: Jurkat细胞活化后,miR-202*、 miR-33b、 miR-568和miR-576的表达明显下调;实时定量PCR验证结果与芯片结果一致;酶切鉴定与序列测定证实miR-568的真核表达载体构建成功;利用miRanda软件预测miR-568的靶分子,筛选出与T细胞活化密切相关的分子;双荧光素酶实验显示miR-568对NFAT5有比较明显的抑制作用结论: T细胞活化后,miR-202*、 miR-33b、 miR-568和miR-576表达明显下调;NFAT5可能是miR-568作用的一个靶分子     

永久性房颤的转录组分析及miRNA调控网络的建立

目的探索永久性房颤(p AF)发病相关的关键miRNAs及其调控的靶基因。方法联合应用表达谱芯片和miRNA芯片分析p AF患者(n=7)和健康成人(n=4)的左房组织,筛选p AF相关差异表达的miRNAs,进行靶基因预测后,与表达谱芯片的筛选结果进行负相关分析后的基因集合进行显著性功能分析(GO-analysis);利用miRNA与靶基因之间的靶向调控关系,构建差异miRNA与交集靶基因的调控网络(miRNA-gene-network),得到网络中起核心调控作用的miRNA和被调控的关键靶基因;采用RT-q PCR方法检验另一组p AF患者(n=5)和健康成人(n=4)的左房组织标本。结果表达谱基因芯片发现610个mRNA有显著性改变(fold change2,P0.05),miRNA-靶基因调节网络发现与p AF显著相关的20个miRNAs和107个靶基因,相关度最高的是miR-144、miR-1284、miR-1827、miR-1、miR-3613-3p和miR-101;其调控的重要靶基因包括CACNB2、EFNB1、PTEN、TAOK1、RUNX1和TPM3等;RT-q PCR验证结果显示这些miRNAs和靶基因密切相关。结论通过表达谱基因芯片与miRNAs芯片联合分析p AF左房组织标本,构建miRNA调控网络,发现p AF重要的miRNA-靶基因调控及功能,结果更加准确。     

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。     

基于microRNA差异表达探讨恶性纤维组织细胞瘤致病机制

目的 应用芯片表达分析技术探讨miRNA在恶性纤维组织细胞瘤发病机制中的作用.方法 利用miRCURYTM LNA miRNA表达谱芯片技术高通量筛选NMFH1与MSC、HSF、MRC-5和HT-1080细胞系差异表达miRNA,筛选靶基因,分析调控作用机制.结果 筛查NMFH1与4种对照组细胞系差异表达miRNA,选取与所有正常样本对比均下调miR-222、miR-186及miR-933,均上调miR-886-3p、miR-886-5p、miR-183、miR-340及miR-BART7进行qRT-PCR实验,验证芯片数据可靠性.基于生物信息学方法挖掘miRNA靶基因,构建基因调控网络,基于功能组注释信息分析NMFH1风险疾病基因及通路,揭示MFH恶性病变机制.结论 miRNA在肿瘤样本与正常细胞系间显著差异表达,是参与MFH发生发展过程的重要调控因子,发挥负调控基因表达作用,使肿瘤细胞逃避正常生长调控机制,无限增殖和转移,出现恶性表型.     

乳腺癌相关成纤维细胞miRNA表达的检测和分析

目的研究人乳腺癌微环境癌相关成纤维细胞(CAF)与正常成纤维细胞(NF)miRNA表达的差异及其对CAF的生物学功能的影响。方法运用1型胶原酶消化法分别处理临床乳腺癌患者的癌组织和对应癌旁组织标本,原代分离培养CAF和NF细胞;利用免疫荧光法和Western blot法分析CAF和NF细胞成纤维细胞分泌蛋白(FSP)的表达情况,对所分离培养的细胞进行纯度和特性鉴定;利用TranswellTM实验比较CAF与NF细胞的侵袭能力;利用miRNA芯片和芯片结果显著性差异(SAM)分析法分析CAF与NF细胞miRNA表达的差异;对差异miR-205和miR-221,在原代培养的CAF和NF进行实时定量PCR(qRT-PCR)验证;利用多种生物信息学软件预测差异miRNA的靶基因;利用DAVID软件对靶基因进行信号通路富集度分析。利用ELISA检测TGF-β和IL-6信号通路的核心蛋白基质金属蛋白酶1(MMP-1)、MMP-2和MMP-9的表达差异。结果成功分离得到原代培养的CAF与NF细胞,纯度大于95%;与NF细胞相比,CAF细胞的侵袭能力明显增强;miRNA芯片分析结果显示,CAF有10个变化倍数1.5的异常表达miRNA(P0.05),其中3个上调表达(miR-221-5p、miR-31-3p、miR-221-3p),7个下调表达(miR-205、miR-200b、miR-200c、miR-141、miR-101、miR-342-3p、let-7g)。信号通路富集度分析发现,miRNA靶基因与细胞分化、细胞黏附、细胞迁移、细胞增殖、细胞分泌和细胞间相互作用等密切相关,其中,异常表达的miR-200b/c和miR-141等miRNA通过抑制其靶基因,影响TGF-β信号通路、IL-6信号通路,进而影响CAF的侵袭和转移。结论人乳腺癌微环境CAF的miRNA表达谱发生显著变化,CAF细胞中异常表达miRNA可能参与了NF向CAF的转化,并与CAF细胞的增殖、黏附、侵袭、转移有密切关系。     

miR-194-5p在微流控芯片筛选的肺癌间质表型亚系的作用

目的分析肺癌间质表型亚系A3细胞中上皮间质转化(EMT)相关的miR-194-5p鉴定、分析及其靶基因功能富集的生物学过程和信号通路。方法使用微流控芯片筛选母系肺癌A549细胞获得间质表型亚系A3细胞,利用miRCURYTM芯片筛选差异性表达的miRNA。利用MTT、Transwell实验检测miR-194-5p对亚系细胞增殖、迁移、侵袭能力的影响。应用Miranda、MiRBase、TargetScan数据库和DAVID在线软件对miR-194-5p进行靶基因预测及相关信号通路、生物学功能富集分析。结果成功筛选获得具有间质表型亚系A3细胞,与母系A549细胞相比,在A3亚系中miR-194-5p的表达水平显著下调,转染miR-194-5p mimics后细胞迁移和侵袭能力发生显著降低但增殖未受影响;转染miR-194-5p inhibitor后细胞的迁移和侵袭能力增强。miR-194-5p的48个靶基因主要在蛋白质结合等生物学过程中起作用,信号通路显著富集于TGF-β等EMT相关信号转导通路。结论从微流控芯片获得的间质表型细胞亚系成功筛选EMT相关miRNA,其中miR-194-5p抑制肺癌EMT进程,是潜在的治疗靶点。     

蜂胶黄酮PB3A作用下结肠癌细胞株中miRNA-198和miRNA-296-5p的表达及功能预测

目的:探讨蜂胶黄酮短叶松素-3-乙酸酯(pinobanksin-3-acetate,PB3A)对结肠癌SW480细胞微小RNA(microRNA,miRNA)表达谱的影响,为结肠癌的治疗及靶向药物研发提供理论依据。方法:使用miRNA芯片技术分析检测蜂胶黄酮PB3A处理人类结肠癌SW480细胞后miRNA表达谱的变化。通过实时荧光定量PCR方法检测miRNA-198和miRNA-296-5p的表达水平,以此来验证miRNA芯片结果的准确性和可靠性。利用miRWalk、Micro T、miRanda等12个网上数据库预测这2条miRNAs的靶基因并进行靶基因功能富集分析。结果:miRNA芯片分析结果显示,蜂胶黄酮PB3A干预24 h后结肠癌SW480细胞中差异表达倍数在2倍及以上的miRNA有267条,其中差异表达倍数达10倍及以上的miRNA有30条,28条为上调表达,2条下调表达;RT-qPCR实验结果显示miRNA-198和miRNA-296-5p的表达量趋势跟miRNA芯片结果一致,表达差异有统计学意义(P0.05)。miRNA靶基因预测发现miRNA-198有859个靶基因,miRNA-296-5p有906个靶基因;对这些可能被调控的靶基因进行Gene Class分析,结果显示miRNA-198和miRNA-296-5p的靶基因功能主要为转录因子、拷贝数变异、细胞分化、癌基因、蛋白激酶、组蛋白、转移癌基因、肿瘤抑制基因等(P0.05)。信号通路富集分析结果显示,miRNA-198靶基因显著富集于肿瘤通路、Wnt信号通路、胞吞通路、Erb B信号通路、黏着斑通路、黑素生成通路等信号通路,而miRNA-296-5p靶基因在MAPK信号通路、胞吞通路、轴突导向通路、Wnt信号通路、胰岛素信号通路、钙离子信号通路等信号通路中出现聚集(P0.05)。结论:蜂胶黄酮PB3A影响结肠癌SW480细胞的miRNA表达谱。PB3A作用下miRNA-198和miRNA-296-5p的异常表达可能参与PB3A抗结肠癌的过程。     

严重烫伤大鼠早期胫骨前肌组织中微小RNA表达谱数据的靶基因分析

目的初步确定严重烫伤大鼠早期胫骨前肌组织中差异表达微小RNA(miRNA)的靶基因,从而为进一步机制研究指明方向。 方法采用高通量芯片技术检测严重烫伤大鼠早期胫骨前肌miRNA表达谱数据,筛选部分差异明显且相关性较好的miNRA,包括miR-1-3p、miR-206-3p、miR-133a-3p、miR-22-3p、miR-30a-5p、miR-30d-3p、miR-190b-5p、miR-628和miR-678,利用互联网络检索数据库Mirbase、Miranda和Mirdb,对这些差异miRNA进行靶基因预测。 结果3大数据库预测结果显示差异miRNA主要调控79个靶基因,网络关系图显示了miR-1-3p、miR-206-3p、miR-133a-3p、miR-22-3p、miR-30a-5p、miR-30d-3p、miR-190b-5p、miR-628和miR-678等miRNA及其预测靶基因之间复杂的调控网络关系。 结论根据初步的预测结果,miR-1-3p和miR-206-3p共同调控的靶基因较多,可作为进一步机制研究的理论依据。     

microRNA-124-3p靶向调控STAT3抑制神经细胞中肠道病毒71型的复制

目的构建microRNA-124-3p表达上调和下调的SK-N-SH细胞,探讨microRNA-124-3p对肠道病毒71型(EV71)在SK-N-SH中的复制机制。方法构建过表达miRNA的miRNA mimic和敲低miRNA的miRNA inhibitor。检测miRNA-124-3p,EV71核酸,细胞病变效应(CPE),病毒滴度TCID₅₀,Ratio值,VP1、STAT3、P-STAT3、CC-ND2、MMP2蛋白表达。结果与miR-124-3p mimic NC组比,miR-124-3p mimic组miR-124-3p上升,LgTCID₅₀降低,EV71核酸的复制受抑,转染野生型miRSTAT3-WT质粒细胞活性被上调的miRNA-124-3p抑制,STAT3、P-STAT3、CC-ND2和MMP2降低(均P<0.05),与miR-124-3p inhibitorNC组比,miR-124-3p inhibitor组miR-124-3p降低,CPE增高,STAT3、P-STAT3、CC-ND2和MMP2升高(均P<0.05)。结论EV71感染SK-N-SH神经细胞,复制受抑,与microRNA-124-3p靶向抑制STAT通路分子STAT3、P-STAT3、CCND2和MMP2有关。     

慢性神经病理性疼痛对大鼠脊髓背角miRNA表达的影响

目的 筛选慢性神经病理性疼痛大鼠脊髓背角差异表达的miRNA,并预测其调控的靶基因.方法 建立大鼠坐骨神经慢性压迫损伤CCI模型,在术后疼痛高峰期取腰膨大脊髓背角,用miRNA芯片筛选CCI大鼠差异表达的miRNAs,再用荧光实时定量RT-PCR验证差异表达的miRNAs,并利用MIRANDA、TARGETSCAN、PICTAR 3个数据库找出这些miRNA可能调控的靶基因.结果 CCI大鼠表达上调的有miR-99b,表达下调的有miR-674-3p、miR-879与miR-325-5p.RT-qPCR验证结果与芯片基本相符.预测这些miRNA可能的靶基因约26个,这些基因功能广泛.结论 慢性神经病理性疼痛可导致miRNA的表达发生变化,这些miRNA及其调控的靶基因为进一步研究奠定了基础.     

小鼠4倍体胚胎诱导蜕膜化反应

目的 探讨小鼠囊胚内细胞团（ICM）在蜕膜化过程中是否具有调控作用。 方法 采用电融合技术制备4倍体胚胎,作为内细胞团缺陷胚胎,通过输卵管胚胎移植制备4倍体胚胎诱导蜕膜组织,以正常2-细胞胚胎诱导的蜕膜组织作为对照,从着床位点和蜕膜形态对两组蜕膜进行比较分析后,采用高通量测序筛选两组中差异表达的微小RNA (miRNA),生物信息学分析两组蜕膜中差异miRNA的靶基因,进行基因功能注释和通路富集分析。 结果 4倍体胚胎诱导的蜕膜组织与2-细胞胚胎诱导蜕膜组织在着床位点极为相似,但是蜕膜形态差异存在显著性。两组蜕膜中差异表达miRNA共有16个,与2-细胞胚胎诱导蜕膜相比,11个miRNA（miR-466f-3p、miR-302 d-3p、miR-466i-5p、miR-465c-5p、miR-302a-5p、miR-7068-3p、miR-741-3p、miR-302a-3p、miR-433-5p、miR-144-5p、miR-878-5p）在4倍体胚胎诱导蜕膜中表达上调,5个miRNA（miR-690、miR-193b-5p、miR-147-3p、novel_327、miR-363-3p）在4倍体胚胎诱导蜕膜中表达下调。生物信息学分析显示,差异miRNA功能主要集中在蛋白结合、离子束缚等功能,靶基因主要参与环磷酸鸟苷 蛋白激酶G(cGMP-PKG)信号通路、雌激素信号通路、血管内皮生长因子(VEGF)信号通路等。 结论 内细胞团在蜕膜化反应过程中具有重要调控作用。     

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.     

自发性高血压大鼠延髓microRNA差异表达分析

目的　探讨自发性高血压大鼠延髓microRNA（miRNA）差异表达谱及其靶基因生物信息学分析。 方法　采用自发性高血压大鼠模型（SHR组）,同周龄SD大鼠为对照组（Control组）。利用miRNA芯片检测大鼠延髓中miRNAs差异表达谱。 结果　与对照组比较,SHR组尾动脉收缩压显著升高（P＜0.0001）;SHR组延髓组织miRNAs有显著差异表达谱,16个miRNAs表达上调和7个miRNAs表达下调（1.5-fold change cutoff, P<0.05）。qRT-PCR验证结果显示,与对照组比较,SHR组延髓miR-153、miR-193及miR-301a表达显著下降,与芯片结果一致。生物信息学分析显示,差异表达miRNAs可能调控2775个靶基因（target score≥83）。这些靶基因主要富集在12个信号通路,包括磷脂酰肌醇3-激酶（Phosphatidylinositide3-kinase,PI3K）通路等。 结论　自发性高血压大鼠延髓组织中miR-153、miR-193及miR-301a明显下调,且生物信息学分析提示PI3K通路介导神经炎症可能作为高血压中枢相关差异表达miRNAs调控靶基因介导的主要致病通路。     

Global microRNA profiles and signaling pathways in the development of cardiac hypertrophy

Hypertrophy is a major predictor of progressive heart disease and has an adverse prognosis. MicroRNAs (miRNAs) that accumulate during the course of cardiac hypertrophy may participate in the process. However, the nature of any interaction between a hypertrophy-specific signaling pathway and aberrant expression of miRNAs remains unclear. In this study, Spague Dawley male rats were treated with transverse aortic constriction (TAC) surgery to mimic pathological hypertrophy. Hearts were isolated from TAC and sham operated rats (n=5 for each group at 5, 10, 15, and 20 days after surgery) for miRNA microarray assay. The miRNAs dysexpressed during hypertrophy were further analyzed using a combination of bioinformatics algorithms in order to predict possible targets. Increased expression of the target genes identified in diverse signaling pathways was also analyzed. Two sets of miRNAs were identified, showing different expression patterns during hypertrophy. Bioinformatics analysis suggested the miRNAs may regulate multiple hypertrophy-specific signaling pathways by targeting the member genes and the interaction of miRNA and mRNA might form a network that leads to cardiac hypertrophy. In addition, the multifold changes in several miRNAs suggested that upregulation of rno-miR-331*, rno-miR-3596b, rno-miR-3557-5p and downregulation of rno-miR-10a, miR-221, miR-190, miR-451 could be seen as biomarkers of prognosis in clinical therapy of heart failure. This study described, for the first time, a potential mechanism of cardiac hypertrophy involving multiple signaling pathways that control up- and downregulation of miRNAs. It represents a first step in the systematic discovery of miRNA function in cardiovascular hypertrophy.     

Integrative analysis of microRNA, mRNA and aCGH data reveals asbestos- and histology-related changes in lung cancer

Lung cancer has the highest mortality rate of all of the cancers in the world and asbestos-related lung cancer is one of the leading occupational cancers. The identification of asbestos-related molecular changes has long been a topic of increasing research interest. The aim of this study was to identify novel asbestos-related molecular correlates by integrating miRNA expression profiling with previously obtained profiling data (aCGH and mRNA expression) from the same patient material. miRNA profiling was performed on 26 tumor and corresponding normal lung tissue samples from highly asbestos-exposed and non-exposed patients, and on eight control lung tissue samples. Data analyses on miRNA expression, and integration of miRNA and previously obtained mRNA data were performed using Chipster. A separate analysis was used to integrate miRNA and previously obtained aCGH data. Both known and new lung cancer-associated miRNAs and target genes with inverse correlation were discovered. Furthermore, DNA copy number alterations (e.g., gain at 12p13.31) were correlated with the deregulated miRNAs. Specifically, thirteen novel asbestos-related miRNAs (over-expressed: miR-148b, miR-374a, miR-24-1*, Let-7d, Let-7e, miR-199b-5p, miR-331-3p, and miR-96 and under-expressed: miR-939, miR-671-5p, miR-605, miR-1224-5p and miR-202) and inversely correlated target genes (e.g., GADD45A, LTBP1, FOSB, NCALD, CACNA2D2, MTSS1, EPB41L3) were identified. In addition, over-expression of the well known squamous cell carcinoma-associated miR-205 was linked to down-regulation of the DOK4 gene. The miRNAs/genes presented here may represent interesting targets for further investigation and could eventually have potential diagnostic implications.     

结肠癌化疗耐药相关miRNA表达谱的初步研究

目的:应用基因芯片技术筛选结肠癌耐药相关微小RNAs (miRNAs),探究miRNAs对化疗耐药的调控机制。方法:采用基因芯片技术分析结肠癌细胞系HCT8及其耐长春新碱细胞系HCT8/v中miRNAs的表达差异,对部分差异表达的miRNAs应用RT-qPCR进行验证,对表达差异显著的miRNAs进行靶基因预测,利用Gene Ontology (GO)和京都基因与基因组百科全书(KEGG)数据库对预测到的靶基因进行生物信息学分析。结果:筛选出342个差异表达miRNAs,其中190个表达上调,152个表达下调。RT-qPCR验证结果示miR-125-5p、miR-181c-5p和miR-153-3的表达情况和芯片检测结果一致;miR-130a-3p和miR-149-3p的表达与芯片检测结果不一致。GO分析结果显示,耐药相关基因主要富集的旁路是RNA聚合酶II调控区序列特异性DNA结合旁路,主要通过正向调节发挥作用,位置主要是在细胞内有界细胞器上。KEGG分析结果显示,耐药相关基因最为富集的是轴突导向通路、胰岛素信号通路及磷脂酶D信号通路。结论:miRNAs与结肠癌化疗耐药密切相关。对这些miRNAs的研究能使我们对结肠癌的化疗耐药机制有更深入的理解,并为逆转化疗耐药提供新的思路。     

唾液腺腺样囊性癌中相关微小RNAs及其靶基因的生物信息学分析

目的 探讨唾液腺腺样囊性癌(SACC)潜在的微小RNAs(miRNAs）分子标志物,构建miRNA-mRNA调控网络,并阐明其潜在的分子机制。 方法 从Gene Expression Omnibus(GEO)数据库下载2个SACC的微阵列芯片数据,通过R语言进行分析差异的miRNAs与mRNA。应用FunRich 3.1.3软件对差异miRNA进行转录因子富集分析以及预测差异miRNAs的靶基因。对SACC中差异miRNAs的靶基因进行基因本体论（GO）富集分析与京都基因与基因组百科全书（KEGG）通路富集分析以及蛋白互作分析。使用Cytoscape 3.7.0构建miRNA-mRNA调控网络。 结果 1. 共筛选出144个差异表达的miRNAs (DEMs)和1216个差异表达的mRNAs(DEGs);2. KEGG信号通路富集分析发现,靶基因主要参与Rap1信号通路、丝裂原活化蛋白激酶（MAPK）信号通路、磷脂酰肌醇-3激酶/蛋白激酶B（PI3K/Akt）信号通路以及肌动蛋白细胞骨架的调节;3. STRING蛋白相互作用分析发现,ACSL1、SCD、MGLL、FABP4在蛋白相互作用网络中处于核心地位。 结论 我们筛选出SACC与相对正常组织间差异明显的miRNA和mRNA,并分析发现了这些差异分子主要参与的信号通路和功能。     

Ropinirole alters gene expression profiles in SH-SY5Y cells: a whole genome microarray study

Ropinirole (ROP) is a dopamine agonist that has been used as therapy for Parkinson''s disease. In the present study, we aimed to detect whether gene expression was modulated by ROP in SH-SY5Y cells. SH-SY5Y cell lines were treated with 10 µM ROP for 2 h, after which total RNA was extracted for whole genome analysis. Gene expression profiling revealed that 113 genes were differentially expressed after ROP treatment compared with control cells. Further pathway analysis revealed modulation of the phosphatidylinositol 3-kinase (PI3K) signaling pathway, with prominent upregulation of PIK3C2B. Moreover, batches of regulated genes, including PIK3C2B, were found to be located on chromosome 1. These findings were validated by quantitative RT-PCR and Western blot analysis. Our study, therefore, revealed that ROP altered gene expression in SH-SY5Y cells, and future investigation of PIK3C2B and other loci on chromosome 1 may provide long-term implications for identifying novel target genes of Parkinson''s disease.