微小RNA-138-5p在前列腺癌细胞中的表达及对其侵袭能力的影响

目的:探讨微小RNA(miR)-138-5p在前列腺癌(PCa)中的表达及对前列腺癌侵袭、迁移、凋亡等能力的影响。方法:miR-138-5p模拟物转染正常前列腺上皮细胞(RWPE)-1、DU145细胞,实时定量反转录聚合酶链反应(RT-qPCR)用于检测转染前后细胞miR-138-5p的表达。细胞计数试剂盒(CCK-8...     

微小RNA-214-3p介导神经营养酪氨酸激酶受体2型通路调节血管内皮生长因子旁分泌在骨关节炎发展中的作用

目的:探讨微小RNA(miR)-214-3p在骨关节炎(OA)软骨细胞中的表达及其调节内皮细胞迁移和血管生成的机制。方法:选取2020年6月至2020年12月在郑州大学第一附属医院接受全膝关节置换的16例OA患者及12例无膝关节疾病但因创伤导致下肢截肢的患者分别作为OA组和健康组,获取软骨标本,提取软骨细胞。采用蛋白印...     

重型颅脑损伤病人外周血miRNA生物信息学分析

目的 通过生物信息学方法分析重型颅脑损伤（sTBI）病人外周血微小RNA（miRNA）的靶基因及功能。方法 从GEO数据库中检索获取sTBI病人和对照组外周血的基因芯片数据,应用生物信息学方法筛选差异表达的miRNA,并进行靶基因预测和生物学功能及信号通路分析,构建miRNA及靶基因的调控网络。结果 检索得到芯片GSE21854,筛选得到145个差异表达的miRNA,预测得到靶基因共580个。这些靶基因的功能主要为细胞增殖负性调控、转换生长因子β受体信号通路负性调控等,主要分布在Ras信号通路、转换生长因子β信号通路等。miRNA及靶基因的调控网络图显示hsa-miR-125a-5p、hsa-miR-760、hsa-miR-217、hsa-miR-199a-3p、hsa-miR-543是调控核心。结论 sTBI病人外周血存在差异性表达的miRNA,hsa-miR-125a-5p、hsa-miR-760、hsa-miR-217、hsa-miR-199a-3p、hsa-miR-543与sTBI的进展密切相关。     

miR-26b Mimic Inhibits Glioma Proliferation In Vitro and In Vivo Suppressing COX-2 Expression

Glioma is the most common malignant tumor of the nervous system. Studies have shown the microRNA-26b (miR-26b)/cyclooxygenase-2 (COX-2) axis in the development and progression in many tumor cells. Our study aims to investigate the effect and mechanism of the miR-26b/COX-2 axis in glioma. Decreased expression of miR-26b with increased levels of COX-2 was found in glioma tissues compared with matched normal tissues. A strong negative correlation was observed between the level of miR-26b and COX-2 in 30 glioma tissues. The miR-26b was then overexpressed by transfecting a miR-26b mimic into U-373 cells. The invasive cell number and wound closing rate were reduced in U-373 cells transfected with miR-26b mimic. In addition, COX-2 siRNA enhanced the effect of miR-26b mimic in suppressing the expression of p-ERK1 and p-JNK. Finally, the in vivo experiment revealed that miR-26b mimic transfection strongly reduced the tumor growth, tumor volume, and expression of matrix metalloproteinase-2 (MMP-2) and MMP-9. Taken together, our research indicated a miR-26b/COX-2/ERK/JNK axis in regulating the motility of glioma in vitro and in vivo, providing a new sight for the treatment of glioma.     

Hsa-miR-202-3p,up-regulated in type 1 gastric neuroendocrine neoplasms,may target DUSP1

AIM To detect abnormal micro RNA(miRNA) expression in type 1 gastric neuroendocrine neoplasms(g-NENs) and find potential target genes.METHODS Tumour tissues from patients with type 1 g-NENs were used as experimental samples, and gastric mucosal tissues from the same patients obtained during gastroscopy review after several months were used as control samples. miRNA expression was examined with Agilent human miRNA chips and validated via RTPCR. Three types of target gene prediction software(TargetScan, PITA, and microRNAorg) were used to predict potential target genes of the differentially expressed miRNAs, and a dual-luciferase reporter assay system was used for verification. RESULTS Six miRNAs were significantly upregulated or downregulated in the tumours compared to the control samples. Among them, miR-202-3 p was extraordinarily upregulated. RT-PCR of seven sample sets confirmed that miR-202-3 p was upregulated in tumour tissues. In total, 215 target genes were predicted to be associated with miR-202-3 p. Among them, dual-specificity phosphatase 1(DUSP1) was reported to be closely related to tumour occurrence and development. The dual-luciferase reporter assay showed that miR-202-3 p directly regulated DUSP1 in 293 T cells. CONCLUSION miR-202-3 p is upregulated in type 1 g-NEN lesions and might play important roles in the pathogenesis of type 1 g-NENs by targeting DUSP1.     

血清miR-29联合LncRNA TUG1与ADMA对缺血性脑卒中的鉴别诊断价值

目的 探讨血清微小RNA-29(miR-29)联合长链非编码RNA(lncRNA)TUG1及非对称二甲基精氨酸(ADMA)对缺血性脑卒中的鉴别诊断价值。方法 收集2017年6月-2018年7月本院确诊的缺血性脑卒中患者110例,选取出血性脑卒中患者80例,同期纳入本院的体检健康者100例; 采用实时荧光定量PCR(RT-PCR)法检测血清miR-29和LncRNA TUG1表达水平; 采用酶联免疫吸附法(ELISA)检测血清ADMA水平。结果 与出血性脑卒中组miR-29(60.7±4.3)-log,LncRNA TUG1(16.4±1.4)-log,ADMA(6.3±0.7)mIU/mL和健康对照组miR-29(62.3±4.8)-log; LncRNA TUG1(15.9±1.3)-log; ADMA(6.4±0.6)mIU/mL比较,缺血性脑卒中组血清LncRNA TUG1(43.5±3.5)-log和ADMA(11.4±1.4)mIU/mL水平显著升高,而血清miR-29(31.4±2.1)-log水平显著降低(P<0.05),而出血性脑卒中组和健康对照组血清miR-29、LncRNA TUG1及ADMA水平无明显差异(P>0.05)。Spearman相关性分析显示,血清LncRNA TUG1及ADMA水平与NIHSS评分(LncRNA TUG1:r=0.538,P=0.002; ADMA:r=0.566,P=0.001)呈正相关,而血清miR-29水平与NIHSS评分(miR-29:r=-0.545,P=0.001)呈负相关。血清miR-29、LncRNA TUG1及ADMA区分缺血性脑卒中与非缺血性脑卒中(出血性脑卒中和健康对照者)的AUC分别为0.863(95%CI=0.800～0.944,P<0.001)、0.912(95%CI=0.833～0.977,P<0.001)和0.764(95%CI=0.688～0.887,P<0.001); 敏感度及特异度分别为85.3%/82.1%、94.2%/73.5%和76.8%/81.2%; 对应的临界值分别为48.6-log、33.2-log和9.5 mIU/mL。当联合血清miR-29、LncRNA TUG1及ADMA时区分缺血性脑卒中与非缺血性脑卒中的AUC为0.945(95%CI=0.932～0.998,P<0.001),敏感度为83.8%,特异度为97.3%。结论 联合血清miR-29、LncRNA TUG1及ADMA对缺血性脑卒中具有潜在的鉴别诊断价值。     

The microRNApolymorphisms inmiR-150 and miR-1179 are associated with risk of idiopathic recurrent pregnancy loss

Research questionAre single nucleotide polymorphisms of microRNAs (miRNAs) and risk of idiopathic recurrent pregnancy loss (RPL) associated?DesignA total 375 patients with idiopathic RPL (age, mean ± standard deviation [SD] 33.02 ± 4.24 years; body mass index [BMI], mean ± SD, 21.57 ± 3.70 kg/m²) and 276 control participants (age, mean ± SD, 33.01 ± 5.27 years; BMI, mean ± SD, 21.58 ± 3.20) were recruited. Pregnancy loss was diagnosed using human chorionic gonadotrophin concentrations, ultrasonography and/or physical examination prior to 20 weeks of gestation. The genotype of the participants was determined by polymerase chain reaction restriction fragment length polymorphism analysis. Statistical analysis was performed to investigate the differences in frequencies between the control and RPL genotypesResultsThe miR-150G>A heterozygous genotype was significantly associated with increased risk of RPL (adjusted odds ratio 2.502, 95% confidence interval 1.555–4.025; P = 0.0002). The miR-1179A>T heterozygous genotype was significantly associated with decreased risk of RPL (adjusted odds ratio 0.633, 95% confidence interval 0.454–0.884; P = 0.007). Some allele combinations that included miR-150A or miRNA-1179T resulted in an increase or decrease in risk of RPL, respectively.ConclusionsThe miR-150G>A and miR-1179A>T polymorphisms were more frequently associated with RPL compared with controls.