胰腺癌患者血浆miR-155检测及其诊断价值

目的 检测胰腺癌患者血浆miR-155表达量,评价其对胰腺癌的诊断价值.方法 收集62例胰腺癌、61例慢性胰腺炎(CP)及36例正常对照者的血标本,抽提血浆RNA,应用实时PCR检测miR-155表达量,并分析其与胰腺癌临床参数的关系.应用接受者操作特征(ROC)曲线下面积(AUC)评价血浆miR-155表达量对胰腺癌的诊断价值.结果 胰腺癌、CP和正常对照组的血浆miR-155表达量分别为5.41±3.14、2.59±2.49和0.77±1.17,胰腺癌血浆miR-155表达量显著高于CP及正常对照组(P＜0.01).胰腺癌血浆miR-155表达量与患者年龄、性别、肿瘤大小等均无显著相关性,而与肿瘤TNM分期呈显著负相关(r=-0.323,P=0.01).经ROC分析,胰腺癌对正常对照组的AUC为0.943(95%CI0.902～0.985),敏感性和特异性分别为87.1%和83.3%;胰腺癌对CP的AUC为0.762(95%CI0.678～0.846),敏感性和特异性分别为64.5%和73.8%;胰腺癌对正常对照组+CP组的AUC为0.829(95%CI0.767～0.892),敏感性和特异性分别为62.9%和84.5%.结论 胰腺癌患者血浆miR-155表达量显著升高,对胰腺癌的诊断可能有一定的应用价值.     

miRNA-146a、miRNA-196a2和miRNA-499单核苷酸多态性与肝细胞癌遗传易感性的相关性研究

目的:探讨miRNA-146a（miR-146a）、miRNA-196a2（miR-196a2）和miRNA-499（miR-499）单核苷酸多态性与肝细胞癌遗传易感性的关系。方法:采用病例对照研究设计。选取扬州大学附属医院2015年4月至2019年3月收治的肝细胞癌患者175例（肝细胞癌组）及同时期门诊体检的302名...     

MicroRNA-based therapy in pain medicine: Current progress and future prospects

MicroRNAs (miRNAs) are small noncoding RNA molecules of 18–25 nucleotides in length that regulate gene expression involved in fundamental cell processes. The induction and chronification of pain is associated with many expressional changes in pain-related proteins. miRNA has the potential to regulate gene and protein expression associated with the induction and chronification of pain. Thus, miRNAs might have promise in therapy and as a diagnostic and prognostic biomarker in pain medicine. The application of miRNA has been an emerging field in pain research in recent years. Many studies focusing on the regulation of miRNAs under different tissue and nociceptive stimuli have been performed in recent years. In this review, we intend to introduce the most recent research in the field of miRNA related with pain medicine such as the expression and function of miRNA in different animal pain model, the challenge of application and delivery of miRNA in vivo, the potential toxic effects of miRNA and future problems in clinical application that need to be resolved. This review focuses on the results of miRNA in animal studies and the prospect for future success.     

Meta-analysis of human lung cancer microRNA expression profiling studies comparing cancer tissues with normal tissues

ABSTRACT: BACKGROUND: Lung cancer is the major cause of cancer death globally, it is often diagnosed at an advanced stage and has one of the lowest survival rates of any type of cancer. The common interest in the field of lung cancer research is the identification of biomarkers for early diagnosis and accurate prognosis. There is increasing evidence to suggest that microRNAs play important and complex roles in lung cancer. METHODS: A meta-analysis was conducted to review the published microRNA expression profiling studies that compared the microRNAs expression profiles in lung cancer tissues with those in normal lung tissues. A vote-counting strategy that considers the total number of studies reporting its differential expression, the total number of tissue samples used in the studies and the average fold change was employed. RESULTS: A total of 184 differentially expressed microRNAs were reported in the fourteen microRNA expression profiling studies that compared lung cancer tissues with normal tissues, with 61 microRNAs were reported in at least two studies. In the panel of consistently reported up-regulated microRNAs, miR-210 was reported in nine studies and miR-21 was reported in seven studies. In the consistently reported down-regulated microRNAs, miR-126 was reported in ten studies and miR-30a was reported in eight studies. Four up-regulated microRNAs (miR-210, miR-21. miR-31 and miR-182) and two down-regulated mcroiRNAs (miR-126 and miR-145) were consistently reported both in squamous carcinoma and adenocarcinoma-based subgroup analysis, with the other 14 microRNAs solely reported in one or the other subset. CONCLUSIONS: In conclusion, the top two most consistently reported up-regulated microRNAs were miR-210 and miR-21. The results of this meta-analysis of human lung cancer microRNA expression profiling studies might provide some clues of the potential biomarkers in lung cancer. Further mechanistic and external validation studies are needed for their clinical significance and role in the development of lung cancer.     

微小RNA与肿瘤

微小RNA(miRNA)是一类小分子的非编码调控的单链RNA,它参与有机体的生长、发育等多种生理过程.近年来研究表明肿瘤组织具有不同的miRNA表达,异常表达的miRNA影响了肿瘤细胞的发生、进展、分化、转移和复发.miRNA的不同表达不仅有助于肿瘤组织的诊断,而且可以指导预后.针对miRNA为靶点的动物学研究也发现,干扰某种miRNA表达可以减小肿瘤体积,抑制腹膜转移而发挥治疗作用.     

miR-143/145侧翼序列多态性与膀胱癌遗传易感性研究

目的 探讨miR-143/145侧翼序列rs4705342和rs4705343多态性与膀胱癌遗传易感性的关系。方法 采用基于医院的病例对照研究,收集106例膀胱癌患者和162例对照人群外周静脉血样本,TaqMan探针法和聚合酶链反应-限制性长度片段多态性分析rs4705342和rs4705343多态性。结果 rs4705342位点CC基因型和C等位基因显著降低了膀胱癌的发病风险（CC与TT相比,调整OR=0.30,95%CI:0.10～0.88,P=0.018;C与T相比,调整OR=0.60,95%CI:0.40～0.89,P=0.01）。 单倍型分析显示,rs4705342C-rs4705343T单倍型显著降低了膀胱癌的发病风险（OR=0.33,95%CI:0.15～0.74）。结论 miR-143/145侧翼序列rs4705342CC基因型可能是膀胱癌发病的保护因素。     

Differential expression of microRNAs related to apoptosis in human osteoblasts induced by sodium fluoride北大核心

BACKGROUND: Long-term excessive intake of fluoride, especially through drinking water, can cause chronic fluorosis of bone. The disease can lead to bone damage and deformity, and is difficult to recover. Unfortunately, we have not developed a noninvasive or minimally invasive method for its early diagnosis. OBJECTIVE: To observe the expression of apoptosis-related miRNAs under the action of excessive fluorine in human osteoblasts. METHODS: The fluorine model was established in the human osteoblasts by cultured with 20 and 40 mg/L sodium fluoride for 24 and 48 hours, respectively. The expression levels of apoptosis-related miRNAs were determined by PCR array. RESULTS AND CONCLUSION: After 24-hour treatment of sodium fluoride, 48 kinds of miRNAs were upregulated and 4 ones were down-regulated in the osteoblasts. After 48-hour treatment of sodium fluoride, 21 kinds of miRNAs were upregulated and 2 ones were down-regulated. It showed that nine up-regulated miRNAs and one down-regulated miRNA were same in two periods. The 10 miRNAs are selected for target gene analysis on bioinformatics software that refer to the effect of anti-apoptosis and pro-apoptosis, which is of great significance for the early identification of skeletal fluorosis. © 2018, Journal of Clinical Rehabilitative Tissue Engineering Research. All rights reserved.     

MiRNA-132上调脑源性神经营养因子表达抑制β-淀粉样蛋白诱导的神经元损伤研究

研究背景脑源性神经营养因子(BDNF)在阿尔茨海默病(AD)发病机制中发挥重要作用,微小RNA-132(mi RNA-132)在神经元呈高表达,可以通过调控靶基因表达参与BDNF介导的神经发育过程。本研究旨在探讨阿尔茨海默病神经元模型中mi RNA-132与BDNF的调控关系和神经保护作用。方法体外培养海马神经元72 h后慢病毒转染mi RNA-132,并于体外培养第7天以β-淀粉样蛋白(Aβ)处理制备阿尔茨海默病神经元模型;实时荧光定量聚合酶链反应观察对照组与AD组mi RNA-132表达差异以及不同处理组BDNF m RNA表达变化,噻唑蓝法观察不同处理方式对细胞活性的影响。结果 (1)AD组海马神经元mi RNA-132(t=13.888,P=0.000)和BDNF m RNA(t=-12.274,P=0.000)表达水平均低于对照组。(2)原代培养的海马神经元经慢病毒转染后倒置相差荧光显微镜可见绿色荧光蛋白,对照组(t=16.135,P=0.000)和AD组(t=8.656,P=0.000)转染过表达mi RNA-132后均能上调BDNFm RNA表达。(3)AD组海马神经元活性降低(t=-6.023,P=0.000),AD组转染mi RNA-132后神经元活性增强(t=3.385,P=0.007),予以外源性BDNF共培养后神经元活性明显改善(t=3.672,P=0.004)。结论阿尔茨海默病神经元模型mi RNA-132和BDNF表达水平均下降,mi RNA-132可上调BDNF表达,提示mi RNA-132和BDNF对阿尔茨海默病神经元模型具有神经保护作用,有望为阿尔茨海默病诊断与治疗提供新的视角。     

急性脑梗死早期血中miRNAs水平与脑侧支循环建立的关系

目的探讨急性脑梗死早期外周血清中miRNAs水平与侧支循环建立的关系及临床意义。方法选择2014年1月-2015年11月在我院住院的急性脑梗死患者,根据其脑侧支循环状况,分为侧支循环良好组(42例)与不良组(28例),另设31例健康体检者为对照。比较各组间一般临床资料及梗死早期血清中一组miRNAs的分子变化,并进一步用Logistic回归分析miRNAs水平与梗死患者侧支循环建立的关系。结果血清中抑制血管新生的MIR-15b、MIR-92a及促血管新生的MIR-126、MIR-132和MIR-210水平在侧支循环良好、不良组及对照组间存在差异表达,部分特异性miRNAs分子组间比较有显著性差异(P0.05,P0.01);Logistic回归显示,这些抑制或促血管新生的miRNAs,特别是促血管新生的MIR-126、MIR-132和MIR-210是急性脑梗死侧支循环建立好坏的影响因素。结论早期血清中一组特异性miRNAs分子可能作为一种预测急性脑梗死患者脑内侧支循环状况的便捷指标。     

循环 microRNA-21对冠心病不稳定斑块的预测意义

目的：探讨冠心病（CAD）患者循环 microRNA-21（miRNA-21）相对表达量与冠状动脉内不稳定斑块的关系。方法连续收集2012年1月至2014年12月在广州市第一人民医院心内科住院并接受冠状动脉造影（CAG）及血管内超声（IVUS）检查的 CAD 患者100例,根据 IVUS检查患者冠脉内是否具有不稳定斑块分为稳定斑块组（SP 组）45例、不稳定斑块组（UP 组）55例,并选择同期在本院体检中心进行健康体检的50例健康对照病例作为对照组。采用实时荧光定量聚合酶链式反应技术（qRT-PCR）测定入选病例空腹静脉血浆 miRNA-21的相对表达量,分析血浆 miRNA-21水平与 CAD 患者不稳定斑块的关系。结果不稳定斑块组患者血浆 miRNA-21相对表达量显著高于稳定斑块组和对照组[（0.87±0.10） vs.（0.78±0.11） vs.（0.67±0.08）,P ＜0.05],将 CAD 患者血浆 miRNA-21水平与患者是否存在不稳定斑块做出受试者工作曲线（ROC）,血浆 miRNA-21的曲线下面积（AUC）为0.869（95％CI：0.797～0.940）。多因素 Logistic 回归分析显示血浆 miRNA-21是 CAD 患者存在不稳定斑块的独立预测因子（P ＜0.05）。结论血浆miRNA-21水平升高预示 CAD 患者冠状动脉内斑块的不稳定状态,是预测 CAD 患者存在不稳定斑块的重要生物标志物之一。