lncRNA ZFAS1通过miR-588/HMGA2轴促进肝癌HepG2细胞的增殖、侵袭和迁移

目的：探讨长链非编码RNA锌指结构反义转录本1(lncRNA ZFAS1)调控miR-588/高迁移率蛋白A2(HMGA2)轴对肝癌HepG2细胞增殖、侵袭、迁移的影响。方法：qPCR、WB法检测80例肝癌组织及对应癌旁组织（2018年1月至2019年12月在武汉第三医院首义院区手术切除标本）及人正常肝LO2细胞和肝癌HepG2、Huh7、HCCLM3细胞中ZFAS1、miR-588及HMGA2表达水平;采用Kaplan-Meier进行患者生存曲线分析。将HepG2细胞分为空白组、si-NC组、si-ZFAS1组、si-ZFAS1+inhibitor NC组、si-ZFAS1+miR-588 inhibitor组;qPCR检测各组HepG2细胞中ZFAS1、miR-588表达水平,WB法检测各组HepG2细胞中HMGA2蛋白表达;CCK-8法、Transwell和划痕实验分别检测各组HepG2细胞的增殖、侵袭和迁移能力;双荧光素酶报告基因实验分别验证ZFAS1和miR-588、miR-588和HMGA2的靶向关系。用HepG2细胞移植瘤裸鼠模型检测敲减ZFAS1或/和miR-588对移...     

miR-32-5p通过靶向下调EZH2的表达抑制胰腺癌PANC-1细胞的恶性生物学行为与裸鼠移植瘤生长

目的:探究miR-32-5p通过靶向zeste基因增强子人类同源物2(EZH2)对胰腺癌PANC-1细胞恶性生物学行为的影响及其分子机制。方法:利用GEPIA数据库分析胰腺癌组织中EZH2的表达水平及其与患者的预后生存期的关系,并分析miR-32-5p表达与患者临床病理因素的关系。qPCR法检测正常胰腺HPDE6-C7细胞和胰腺癌PANC-1、AsPC-1、SW1990细胞中miR-32-5p和EZH2 mRNA的表达,通过Lipofectamine^TM2000将miR-NC、miR-32-5p mimic、miR-32-5p inhibitor、pcDNA-NC、pcDNA EZH2质粒分别转染PANC-1细胞,其分为对照组(不转染)、miR-NC组(转染miR-NC)、miR-32-5p mimic组(转染miR-32-5p mimic)、Anti-miR-32-5p组(转染miR-32-5p inhibitor)、miR-NC+pcDNA-NC组(转染miR-NC+pcDNA-NC)、miR-NC+pcDNA EZH2组(转染miR-NC+pcDNA EZH...     

The role of miRNA-210 in pre-eclampsia development

MicroRNAs (miRNAs) are a class of small non-coding, single-stranded RNAs (ribonucleic acids) that play important roles in many vital processes through their impact on gene expression. One such miRNA, miR210, represents a hypoxia-induced cellular miRNA group that hold a variety of functions. This review article highlights the importance of miR-210 in the development of pre-eclampsia.

KEY MESSAGE

• miR-210 is a promising biomarker for monitoring pregnancy with pre-eclampsia. Overexpression of miR-210 had a negative impact on the process of cell migration and trophoblast invasion.

     

5,7,2,5-tetrahydroxy-8,6-dimethoxyflavone up-regulates miR-145 expression and inhibits proliferation of gastric cancer cells

IntroductionGastric cancer is a frequently detected malignancy, and its incidence has increased over the past decades in East Asia. The present study investigated the effect of 5,7,2, 5-tetrahydroxy-8,6-dimethoxyflavone (THDMF) on gastric cancer cells and explored the underlying mechanism. The study analysed cell viability changes, apoptotic features, and metastasis potential of treatment with THDMF.Material and methodsMTT colorimetric assay was used for measurement of MKN28, MKN45, and GES-1 cell proliferation and flow cytometry for the detection of apoptosis. Transwell and wound healing assays were used to observe the invasion and migration abilities of MKN28 cells. The expression of p21, MMP2/-9, PI3K, and c-Myc proteins was detected by western blotting.ResultsThe THDMF treatment significantly (p < 0.05) reduced MKN28 and MKN45 cell proliferation without changing GES-1 cell viability. A significant increase in apoptotic cell population on treatment with THDMF was observed. Treatment of MKN28 cells with THDMF increased the percentage of cells in the G1 phase. Exposure of MKN28 cells to THDMF caused a marked decrease in invasion and migration potential in comparison to control cells. The expression of miR-145 was markedly increased in MKN28 cells on treatment with THDMF. In MKN28 cells expression of c-Myc, PI3K, p-AKT, MMP-2, and MMP-9 was suppressed markedly on exposure to THDMF. The expression of p21 protein in MKN28 cells was markedly promoted on exposure to THDMF.ConclusionsTHDMF exhibits anti-cancer effect on gastric cancer cells in vitro by activation of cell apoptosis and arrest of cell cycle. In addition, THDMF promoted miR-145 expression and down-regulation of PI3K/AKT signalling pathway in MKN28 cells. Therefore, THDMF may be utilised as a potential novel therapeutic agent for the treatment of gastric cancer.     

胃癌患者血清miR-300的表达及临床意义

目的探讨胃癌患者血清中miR-300的表达水平及miR-300作为胃癌诊断标记物的可能性。方法采用实时定量RT-PCR方法检测25例胃癌患者及15例健康志愿者血清中miR-300的表达水平;采用全自动化学发光免疫分析法,检测上述标本的血清癌胚抗原（CEA）、癌抗原125（CA125）、癌抗原199（CA199）及癌抗原153（CA153）水平。结果 25例胃癌患者miR-300表达水平是正常人的23.4倍,两者差异有统计学意义（P=0.024）;胃癌患者血清CEA、CA125、CA199及CA153水平显著高于对照组（均P〈0.05）;在胃癌的诊断中miR-300的敏感性比CEA、CA125、CA199及CA153高,但特异性较低。结论血清miR-300在胃癌中的表达水平高于正常人,对于胃癌的诊断具有一定价值。     

microRNA-126对VEGF介导血管生成的调控作用

目的 研究microRNA-126(miR-126)对血管内皮细胞生长发育的影响,探寻miR-126可能参与的血管生成过程.方法 常规培养脐静脉内皮细胞(human umbilical vein endothelial cells,HUVECs).构建miR-126过表达载体并转染HUVECs;实验分为:正常细胞组,空载慢病毒转染组,miR-126过表达慢病毒转染组(n=6);于转染第6天后用qRT-PCR检测内皮生长负性调节因子spred1、Pik3R2的mRNA表达水平,Westem blot检测spred1、Pik3 R2的蛋白表达水平.结果 转染第6天后,对qRT-PCR及Western blot检测结果进行分析,过表达组中spread1、Pik3R2的2(-△△Ct)值较其余两组低;过表达组中spred1/GAPDH和Pik3 R2/GAPDH值也均小于其余两组,差异具有统计学意义(P＜0.05).spred1、Pik3R2的mRNA表达水平明显下调,其蛋白表达水平也明显降低.结论 miR-126能促进VEGF的内皮细胞增殖及血管生成作用.     

miR-182在人乳腺癌中的表达及意义

目的 探讨miR-182在人乳腺良恶性组织和细胞株中的表达及其意义.方法 采用实时荧光定量PCR法检测miR-182在2株正常人乳腺细胞、9株人乳腺癌细胞(包括5株低度恶性、4株高度恶性)、11例临床乳腺良性病变组织和22例乳腺癌组织中的表达.结果 乳腺癌细胞株miR-182表达显著低于正常乳腺上皮细胞株,而在高度恶性...     

miR-148b/DUSP1调节巨噬细胞分泌细胞因子CD206促进肝癌的发生

目的 探讨miR-148b/DUSP1信号通路调节巨噬细胞分泌细胞因子CD206的表达对肝癌发生的影响.方法 利用全自动磁珠提取纯化系统提取外周血单核细胞并培养,用粒细胞-巨噬细胞集落刺激因子(granulocyte-macrophage colony stimulating factor,GM-CSF)和巨噬细胞集落刺激因子(macrophage colony stimulating factor,M-CSF)分别诱导生成M1型和M2型巨噬细胞,CD68、CD206进行表型鉴定,ELISA检测M1和M2型巨噬细胞分泌的细胞因子CD206的表达,CCK-8和Transwell实验检测巨噬细胞分泌细胞因子CD206对肝癌细胞(HepG2和Huh7细胞)增殖、侵袭、转移的影响,双荧光素酶报告基因系统验证miR-148b与DUSP1的靶向结合.结果 初步分离并鉴定M1和M2型巨噬细胞,M2型巨噬细胞分泌的细胞因子CD206促进肝癌细胞的生长和侵袭、转移,双荧光素酶报告基因证实DUSP1为miR-148b的靶基因,miR-148b/DUSP1信号通路促进肝癌的发生、发展,巨噬细胞标志物与肝癌患者的临床病理特征相关.结论 miR-148b/DUSP1信号通路影响巨噬细胞分泌的细胞因子促进肝癌发生、发展.     

人microRNA-339慢病毒载体的构建及其对结肠癌细胞SW620迁移的影响

目的 构建人microRNA-339(has-miR-339)慢病毒载体,并探讨miR-339-5p/3p对结肠癌细胞SW620迁移能力的影响.方法 由miRBase及NCBI数据库查找获得miR-339前体序列(pre-miR-339)及其侧翼序列,将pre-miR-339和PLVTHM载体经双酶切后连接,产生PLVTHM-pre-miR-339慢病毒载体,并经测序鉴定;以PLVTHM-pre-miR-339、psPAX2和pMD2.G三质粒包装系统共同转染293FT细胞,包装产生慢病毒.流式细胞仪筛选建立稳定过表达pre-miR-339的SW620细胞株,实时荧光定量RT-PCR检测miR-339-5p及miR-339-3p表达.利用细胞划痕实验进行细胞迁移能力检测.结果 成功构建PLVTHM-pre-miR-339慢病毒载体,测序证实所插入基因序列完全正确.倒置荧光显微镜下观察可见转染后的293FT细胞及SW620细胞均表达绿色荧光.在过表达pre-miR-339的SW620亚细胞系中,miR-3396p及miR-339-3p表达水平显著高于空载对照组.划痕实验结果显示:与SW620/PLVTHM-NC组相比,SW620/PLVTHM-pre-miR-339组细胞迁移减缓,划痕较宽.结论 成功构建了PLVTHM-pre-miR-339慢病毒载体和稳定过表达miR-3396p及miR-339-3p的SW620亚细胞系,并证实miR-339-5p/3p可抑制结肠癌细胞SW620的迁移能力.