人疱疹病毒6型感染HSB-2细胞的lncRNA表达谱变化分析

目的运用高通量测序技术检测人疱疹病毒6型(human herpesvirus 6, HHV-6)感染人淋巴细胞系HSB-2后长链非编码RNA(long non-coding RNA, lncRNA)表达谱的改变, 探究lncRNA在HHV-6感染复制中的作用。方法 HHV-6感染HSB-2细胞72 h后, 提取对照细胞和病毒感染细胞的RNA进行测序, 筛选差异表达的lncRNA;通过生物信息学方法对预测的lncRNA靶基因进行GO注释和KEGG信号通路分析, 构建共表达网络图。qRT-PCR检测差异表达lncRNA的变化倍数。结果共筛选到612个显著差异表达lncRNA, 其中420个为表达上调, 192个表达下调。通过对lncRNA靶基因进行GO和KEGG富集分析显示, 差异表达lncRNA的靶基因与表观染色体调控、免疫应答及细胞代谢等生物学过程密切相关。qRT-PCR确定10条上调IncRNAs表达变化趋势与高通量测序数据一致。结论本研究对HHV-6感染HSB-2细胞的lncRNA表达谱进行分析, 为深入探索lncRNA在HHV-6复制增殖及相关疾病中的作用奠定基础。     

人正常宫颈上皮细胞感染沙眼衣原体的基因表达谱分析

目的分析人正常宫颈上皮细胞(HcerEpic)感染沙眼衣原体(Chlamydia trachomatis, Ct)前后基因表达谱差异。方法 HcerEpic细胞经DEAE-D预处理后加入E型Ct标准株, 培养44 h后收集HcerEpic细胞(感染组), 并以未感染Ct的HcerEpic细胞作为对照组, 提取两组总RNA后反转录并构建cDNA文库。通过高通量测序分析两组基因表达谱差异, 并选择代表性基因通过实时荧光定量PCR(qPCR)验证。结果共检测23 997个基因, 差异基因125个, 其中上调基因119个, 下调基因6个;GO分析显示差异基因富集于对病毒防御反应、Ⅰ型干扰素(interferon, IFN)信号通路、对Ⅰ型IFN的细胞反应等条目;KEGG富集通路为甲型流感、单纯疱疹病毒感染、EB病毒感染、HPV感染、NOD样受体通路等相关通路。结论人正常宫颈上皮细胞感染Ct前后转录组存在差异, 差异基因主要富集于IFN通路, 与细胞抗病毒过程密切相关。qPCR验证了ISG15、IFIT2、OASL、UBE2L6等差异显著且与IFN通路密切相关的基因。     

RNA测序综合分析唐氏综合征胎儿中mRNA和长链非编码RNA表达谱

目的 探讨唐氏综合征胎儿的羊水细胞与匹配妊娠胎儿的羊水细胞中mRNA和长链非编码RNA的差异表达。方法 通过羊膜腔穿刺获得羊水细胞，采用RNA测序进行转录组分析，并将差异表达的转录本进行富集分析。结果测序结果发现，与正常妊娠胎儿相比，唐氏综合征胎儿中存在1432个转录本差异表达，其中779个转录本表达下调（611个蛋白质编码的mRNAs和168个lncRNAs）,653个转录本表达下调（543个蛋白质编码的mRNAs和110个lncRNAs）。这些转录本在唐氏综合征的免疫系统、血管发育、衰老及癌症发展等多方面中发挥作用。结论 唐氏综合征胎儿中mRNA和lncRNA表达谱发生显著变化，其可能在唐氏综合征发病进程中发挥重要作用。     

人呼吸道合胞病毒北京地区A亚型ON1基因型地方株感染A549细胞转录组学分析

目的应用转录组测序方法, 分析北京地区人呼吸道合胞病毒(respiratory syncytial virus, RSV)A亚型优势流行基因型ON1地方株感染A549细胞后差异表达基因, 为RSV防治提供潜在靶点。方法选用已经过全基因组测序确定为RSV A亚型ON1基因型的地方株(61397-ON1)感染A549细胞, 提取总mRNA, 通过转录组测序筛选出与未感染的A549细胞为对照的差异表达基因, 对其进行GO分析、KEGG通路分析, 同时随机选择6个差异表达倍数大于2倍的基因进行qRT-PCR验证。结果以未感染的A549细胞为对照, 筛选出1 632个差异表达基因, 其中807个基因表达上调, 825个基因表达下调。差异基因主要参与细胞因子反应以及MAPK级联反应正向调控等免疫应答相关生物过程, 并在MAPK信号通路、NOD样受体信号通路、p53信号通路、TNF信号通路、IL-17信号通路及NF-κB信号通路发生了富集。选择的6个差异表达基因qRT-PCR验证结果与转录组数据趋势一致。结论 RSV A亚型ON1基因型毒株感染A549细胞后的差异表达基因主要参与细胞因子应答及免疫相...     

鉴定顺铂对人肝癌细胞系转录物组的影响

目的 通过不同浓度顺铂(CDDP)处理人肝癌细胞系并进行转录物组测序分析,旨在揭示顺铂处理对肝癌细胞转录水平的影响。方法 使用终浓度为0、20、50、100和200μmol/L的顺铂处理肝癌细胞系HepG2、Huh7 12 h后进行细胞活性检测、免疫荧光和转录物组测序(RNA-seq),并进行差异表达(DEG)、KEGG及蛋白质相互作用网络分析。结果 顺铂处理后HepG2、Huh7细胞活性下降,且DNA损伤增多,不同顺铂浓度处理下两种细胞系中共同上调的基因共有59个,共同下调的基因有81个。共同上调的基因主要富集在肿瘤发生发展相关通路,共同下调的81个基因主要富集在Rap1信号通路、Ras信号通路、调控干细胞多能性的信号通路、轴突的指导和黏附连接等相关通路。分析共同上下调基因的蛋白质相互作用网络中关键节点的生存预后,Jun原癌基因,AP-1转录因子(JUN)的高表达与患者生存期的延长呈显著相关,生长停滞DNA损伤可诱导蛋白α(GADD45A)的低表达与患者生存期的延长呈显著相关。结论 揭示了肝癌细胞在顺铂处理下的共性转录物变化。JUN和GADD45A的表达差异可能是耐药机制的关键节点,...     

基于转录组测序技术研究高原低氧对小鼠脾脏组织的影响北大核心CSCD

目的:利用转录组学测序技术探究免疫系统在高原低氧胁迫适应过程中相关基因的表达及响应的分子机制。方法:本研究在高、低海拔环境分别饲养C57BL/6小鼠30 d,取脾脏组织利用RNA-Seq进行转录组测序,将得到的差异基因(DEGs)进行GO和KEGG富集分析,并通过荧光定量PCR验证测序数据的准确性。结果:与平原常氧组相比,共富集到4218个DEGs(P<0.05)。其中,ANXA1、S100A8、S100A9和HSPB1等基因显著富集;GO结果表明DEGs主要富集于B细胞激活、免疫球蛋白复合体和抗原结合分类,且JAK-STAT及NOD样受体信号通路为显著富集通路。结论:免疫系统响应高原低氧胁迫的转录调控分子可能致使机体内部免疫调节和炎症反应失衡,为相关高原病的病因学探究提供了新的理论依据。     

创伤愈合及压力治疗过程中瘢痕动物模型转录组水平的变化研究

目的利用RNA测序技术(RNA-seq)研究创伤愈合及压力治疗过程中巴马小型猪瘢痕动物模型转录组水平的变化。方法通过背部取皮建立巴马小型猪瘢痕模型,取皮第60 d开始加压(3.4 kPa)治疗,在取皮第0、14、30、60和90 d分别提取瘢痕组织总RNA进行测序。将所得序列映射到猪参考基因组并进行转录组重建,寻找差异表达基因(DEGs),利用生物信息学方法进一步对所得DEGs进行GO分析和KEGG通路富集性分析,同时挑选部分基因用qRT-PCR进行验证。结果测序数据经过预处理,各组均有78%以上的读段能准确比对到参考序列。DEGs鉴定结果表明,压力治疗前后有568个基因差异表达,其中上调289个,下调279个。GO富集分析发现,各组DEGs主要与细胞外基质、组织发展和皮肤发展相关。KEGG富集分析表明,创伤愈合过程中各组DEGs主要富集于细胞外基质-受体相互作用、黏着斑和凋亡通路;压力治疗前后的DEGs除了富集于以上通路,还富集于MAPK和PI3K信号通路。qRT-PCR检测表明,6个DEGs的表达模式与RNA-Seq分析结果一致,证实RNA-seq结果的可靠性。结论 RNA-seq分析鉴定出创伤愈合及压力治疗过程中瘢痕动物模型的差异表达基因,为临床瘢痕的治疗研究提供实验依据。     

类风湿性关节炎患者外周血单个核细胞MALAT1表达降低、 hsa-miR155-3p表达增加并参与Notch信号通路调节

目的观察类风湿性关节炎(RA)患者长链非编码RNA(lncRNA)转移相关肺腺癌转录本1(MALAT1)、 hsa-miR155-3p表达及其与Notch信号通路关系,探讨RA可能发病机制。方法采取RA患者(RA组)、健康对照者(NC组)外周血,采用高通量基因测序筛选差异表达的lncRNA和mRNA。利用反转录PCR检测筛选的lncRNA MALAT1和hsa-miR155-3p及Notch信号通路受体配体表达。结果通过lncRNA测序分析发现,共有9158条差异表达的lncRNA。基因本体(GO)功能分类注释得出差异表达的mRNA参与免疫炎症反应、细胞转录调节等。通过通路(pathway)分析显示差异表达的mRNA与免疫炎症、应激、 Notch通路等功能基因变化有关。经顺式(Cis)和反式(Trans)预测, Jagged1/2、 Delta1/2、 Notch1/2可能与RA发生密切相关。与NC组相比, RA组MALAT1降低, hsa-miR155-3p明显升高; Notch通路配体Delta1、 Delta2、 Jagged1、 Jagged2及受体Notch1、 Notch2表达升高。相关性分析显示, hsa-miR155-3p与MALAT1呈负相关, hsa-miR155-3p与Notch通路Delta1、 Jagged1呈正相关, MALAT1与Jagged2呈负相关。结论 RA患者lncRNA MALAT1降低、 hsa-miR155-3p增加,共同调节Notch信号通路变化。     

TSTA3基因通过MAPK-ERK通路及下游基质金属蛋白酶2、9促进食管癌侵袭的实验研究

目的探讨TSTA3基因在食管鳞状细胞癌(ESCC)侵袭中的作用及相关机制。方法选择ESCC细胞KYSE150、ECA109, 构建过表达TSTA3基因的KYSE150-TSTA3-WT组和ECA109-TSTA3-WT组, 以及空白对照组(KYSE150-NC组和ECA109-NC组)。对各组细胞进行转录组测序, 依据KEGG数据库进行差异基因的富集分析。蛋白质印迹法和免疫组织化学法检测目标蛋白的表达, 划痕实验检测细胞迁移能力, Transwell实验检测细胞侵袭能力, 明胶酶谱法检测基质金属蛋白酶(MMP)活性。结果 TSTA3基因过表达对ESCC细胞的增殖无明显影响, 但可以增强ESCC细胞的侵袭能力(P<0.05)。TSTA3过表达前后KYSE150细胞的转录组测序共鉴定出817种基因表达上调, 584种基因表达下调, 差异基因主要富集在细胞外基质-受体相互作用、Jak-STAT通路、苯丙氨酸代谢、MAPK信号通路等(P<0.05)。与对照组相比, 过表达野生型TSTA3基因的ECA109和KYSE150细胞中p-ERK蛋白表达水平增高, 用MAPK-ERK通路抑制...     

模拟失重后骨髓来源巨噬细胞转录组高通量测序及分析北大核心CSCD

目的探索模拟失重对小鼠骨髓来源巨噬细胞基因表达的影响。方法采用尾悬吊法构建模拟失重小鼠模型,对照组不做尾吊处理。模拟失重28 d后提取小鼠骨髓来源巨噬细胞并将其分别诱导为M0型和M1型巨噬细胞。随后,提取细胞总RNA进行转录组测序及分析,并通过实时定量RT-PCR验证重要基因的差异表达。结果转录组测序结果显示,模拟失重组与对照组之间的M0型巨噬细胞共有807个基因差异表达;模拟失重组与对照组之间的M1型巨噬细胞共有898个基因差异表达。GO分析表明,M0型巨噬细胞差异表达基因主要集中于免疫应答、趋化等生物学过程中;M1型巨噬细胞差异基因主要富集于炎症反应、细胞迁移的正调控和单核细胞趋化等生物学过程中。KEGG通路分析发现M0型巨噬细胞的差异基因主要涉及趋化因子、细胞因子-细胞因子受体相互作用等信号通路;M1型巨噬细胞的差异基因主要涉及造血细胞谱系、流体剪切应力等信号通路。进一步分析发现,尾吊组与对照组在M0或M1型巨噬细胞中的差异基因均在细胞因子-细胞因子受体相互作用信号通路中富集,其中尾吊组的M0与M1型巨噬细胞中调节单核细胞/巨噬细胞迁移和浸润的关键趋化因子Ccl2均显著高表达,并进一步通过RT-PCR实验得到验证。结论模拟失重可显著影响小鼠巨噬细胞中以Ccl2为代表的与炎症发生和加重密切相关的基因表达水平,这些改变的基因富集于多个生物学过程,可能对巨噬细胞的黏附、迁移等功能产生影响。     

Differential expression profile of long noncoding RNAs in chronic HBV infection: New insights into pathogenesis

Increasing studies have revealed that long noncoding RNAs (lncRNAs) might play vital roles in the development and progression of various diseases including viral infectious diseases. However, the expression and biological functions of lncRNAs in chronic hepatitis B virus (HBV) infection remain largely unknown. Therefore, lncRNA microarray was performed to analyze the lncRNAs' and messenger RNAs' (mRNAs) expression profiles in liver tissues from patients with chronic HBV infection. Subsequently, a comprehensive bioinformatics analysis was conducted to investigate the potential functions of the differentially expressed genes. As a result, a total of 203 differentially expressed lncRNAs and 180 mRNAs were identified in chronic HBV infection. The expressions of five differentially expressed lncRNAs were further validated using quantitative real-time polymerase chain reaction. Gene ontology, pathway analysis, and gene set enrichment analysis revealed that differentially expressed lncRNAs might be mainly be involved in cytokine-cytokine receptor interaction and varied biotransformation processes, including fatty acid metabolism, amino acid metabolism, carbon metabolism, and drug metabolism. Additionally, coexpression networks between differentially expressed lncRNAs and mRNAs were constructed to reveal the hub regulator and analyze the functional pathways. This study provided an overview of lncRNA and mRNA expression in liver tissues from patients with chronic HBV infection. These differentially expressed lncRNAs might play crucial roles in the pathogenesis and progression of chronic HBV infection, which deserve further investigation.     

酒精性股骨头坏死竞争性内源RNA网络及潜在生物标志物的综合分析

背景:酒精性股骨头坏死与饮酒具有高度的相关性,然而其具体发病机制尚不明确且存在一定的个体差异.目的:构建酒精性股骨头坏死的基因网络图谱,进一步探索酒精性股骨头坏死的潜在发病机制.方法:从广西中医药大学第一附属医院骨二科招募3例酒精性股骨头坏死患者和3名健康志愿者,通过对其外周血进行基因测序筛选具有差异表达的mRNA和l...     

胰岛淀粉样多肽对阿尔茨海默病小鼠脑组织中LncRNA和mRNA表达谱的影响

目的:探讨胰岛淀粉样多肽（IAPP）对阿尔茨海默病（AD）小鼠脑组织中长链非编码RNA（LncRNA）和信使RNA（mRNA）表达谱的影响。方法:选取7月龄雄性APP/PS1转基因AD模型小鼠10只,体质量20～30 g。将AD模型小鼠按数字表法随机分为IAPP干预组和对照组,每组5只。IAPP干预组小鼠腹腔内注射0....     

Long non-coding RNA expression profile in atrial fibrillation

To investigate the expression profiles of long non-coding RNAs (lncRNAs) in atrial fibrillation (AF), atrial tissues from 3 AF patients and 3 non-AF patients that were collected for lncRNA expression microarray analyses to explore the role of lncRNA in the pathogenesis of AF. Gene Ontology (GO) categories and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed to identify the main functions of the differentially expressed genes and AF-related pathways. A total of 219 lncRNAs was found to be differentially expressed between AFs and controls. Among them, 156 were upregulated and 63 were downregulated. Eight out of 10 dysregulated lncRNAs such as uc001eqh.1 were validated by quantitative real-time PCR. GO categories, pathway analyses, and interaction network showed a consistent result that differentially expressed genes contribute to the pathogenesis of AF. In conclusion, the findings of our study provide a perspective on lncRNA in AF and the foundation for further study of the biological functions of lncRNAs in AF.     

长链非编码RNA MEG3对肿瘤细胞调控作用的研究进展

长链非编码RNA(long non-coding RNA,lncRNA)是一类长度超过200 nt的不编码蛋白的RNA分子。lncRNA最初被认为是转录噪音,在近年的研究中发现越来越多功能性的lncRNA,其重要性才渐渐被阐述。母系表达基因3(materally expressed gene 3,MEG3)是一种由母系印记基因编码的lncRNA,在对其功能的研究中发现MEG3几乎参与了所有的生理和病理过程,其在多种肿瘤中表现出抑制作用。本文就lnc RNA MEG3对肿瘤细胞调控的作用机制作一综述。     

Long noncoding RNA expression profiles of the doxorubicin-resistant human osteosarcoma cell line MG63/DXR and its parental cell line MG63 as ascertained by microarray analysis

Long non-coding RNAs (lncRNAs) are emerging in molecular biology as crucial regulators of cancer. The efficacy of doxorubicin--based chemotherapy in osteosarcoma (OS) is usually limited by acquired drug resistance. To explore the mechanism of chemoresistance of OS in terms of lncRNA, using a human lncRNA-mRNA combined microarray, we identified 3,465 lncRNAs (1,761 up and 1,704 down) and 3,278 mRNAs (1,607 up and 1,671 down) aberrantly expressed in all three sets of doxorubicin-resistant MG63/DXR and their paired parental MG63 cells (fold-change >2.0, P<0.05 and FDR <0.05). Fifteen randomly selected lncRNAs were dysregulated in MG63/DXR cells relative to MG63 cells by qRT-PCR detection, which were consistent with our microarray data. Bioinformatics analysis identified that classical genes and pathways involved in cell proliferation, apoptosis, and drug metabolism were differently expressed in these cell lines. A lncRNA-mRNA co-expression network identified lncRNAs, including ENST00000563280 and NR-036444, may play a critical role in doxorubicin-resistance of OS by interacting with important genes such as ABCB1, HIF1A and FOXC2. Besides, we found that lncRNA ENST00000563280 was distinctly increased in specimens of OS patients with a poor chemoresponse compared to those with a good chemoresponse and the patients of lower expression of it may survive longer than those of higher expression, which suggest that it may serve as a biomarker to predict the chemoresponse and prognosis of osteosarcoma patients. These results provide important insights about the lncRNAs involved in osteosarcoma chemoresistance and lay a solid foundation for uncovering the mechanism ultimately.     

Comprehensive ceRNA network analysis and experimental studies identify an IGF2-AS/miR-150/IGF2 regulatory axis in colorectal cancer

Recently, a growing body of studies has demonstrated that long non-coding RNA (lncRNA) can act as microRNA (miRNA) sponges to regulate protein-coding gene expression and play essential roles in tumor initiation and progression. In the present study, we constructed a competitive endogenous RNA (ceRNA) network and identified potential regulatory axes in colorectal cancer (CRC) through both bioinformation and experimental validation. Firstly, we obtained differentially expressed (DE) lncRNAs, miRNAs, and mRNAs by analyzing the RNA expression profiles of CRC retrieved from The Cancer Genome Atlas (TCGA) database and CRC patients' data from affiliated Hospital of Jiangnan University, respectively. Then, we established a ceRNA regulatory network of CRC that includes 23 lncRNAs, 7 miRNAs and 244 mRNAs. To further identify these lncRNA-miRNA-mRNA regulatory axes which might play vital roles in CRC tumorigenesis and prognosis, we performed additional analyses using comprehensive bioinformatic methods. Several ceRNA regulatory axes, which consist of 2 lncRNAs, 2 miRNAs and 5 mRNAs, were obtained from the network. Finally, the interactions and correlations among these ceRNA networks were validated by experiments on CRC cell lines and clinical tumor tissues, and a potential IGF2-AS/miR-150/IGF2 axis that perfectly conform to the ceRNA theory was determined. According to the qRT-PCR results, miR-150 overexpression remarkably decreased IGF2-AS and IGF2 expression. Meanwhile, IGF2-AS expression was positively correlated with IGF2 expression in tumor tissue of CRC patients. Besides, dual luciferase reporter assays indicated that miR-150 could bound to IGF2-AS and the 3′UTR of and IGF2. In general, the constructed novel IGF2-AS/miR-150/IGF2 network might provide potential mechanisms of CRC development, and could act as a promising target for CRC treatment.