lncRNA MALAT1通过上调miR-30a-5p促进乳腺癌细胞增殖

目的 探讨lncRNA MALAT1靶向miR-30a-5p对乳腺癌细胞增殖的影响。方法 CCK-8实验检测lncRNA MALAT1对乳腺癌细胞MCF7增殖的影响。建立MCF7荷瘤小鼠模型检测lncRNA MALAT1对荷瘤小鼠肿瘤生长的影响。通过生物信息学网站预测miR-30a-5p是否与lncRNA MALAT1结合,并通过双荧光素酶报告基因实验进行验证。Real time-qPCR检测lncRNA MALAT1过表达对miR-30a-5p表达的影响。CCK-8实验检测lncRNA MALAT1过表达载体和miR-30a-5pmimics共转染到MCF7细胞对细胞增殖的影响。结果过表达lncRNA MALAT1促进MCF7细胞的体外增殖及MCF7细胞荷瘤小鼠肿瘤生长。lncRNA MALAT1与miR-30a-5p结合,且过表达lncRNA MALAT1下调miR-30a-5p的表达。结论 lncRNA MALAT1通过下调miR-30a-5p表达促进乳腺癌细胞增殖。     

miR-146b-5p靶向ZNRF2影响IL-17a诱导乳腺癌细胞增殖、迁移和侵袭

目的:研究miR-146b-5p对IL-17a诱导的乳腺癌细胞增殖、迁移和侵袭的影响及其潜在分子机制.方法:免疫组织化学法检测20例乳腺癌组织和对应癌旁组织中IL-17a表达,qRT-PCR法检测组织中miR-146b-5p表达,Western blot检测组织中ZNRF2蛋白表达.Pearson相关性检验分析乳腺癌组...     

lncRNA TTN-AS1通过miR-519d-3p/MMP2调控肺腺癌A549细胞的活力和侵袭

目的:观察肺腺癌组织中长链非编码RNA(lncRNA)TTN反义RNA 1(TTN-AS1)的表达情况,以及沉默TTN-AS1表达对肺腺癌A549细胞活力和侵袭的影响。方法:RT-qPCR法检测32例肺腺癌和癌旁正常组织中TTN-AS1、微小RNA-519d-3p(miR-519d-3p)和基质金属蛋白酶2(MMP2)的mRNA表达水平。将未转染的A549细胞设为空白组,转染si-NC的为si-NC对照组,转染沉默TTN-AS1表达的siRNA为si-lncRNA组(n=5),采用CCK8和Transwell方法检测沉默TTN-AS1表达对A549细胞活力和侵袭的影响。使用双萤光素酶报告基因实验、RNA免疫沉淀实验、RT-qPCR和Western blot测定TTN-AS1对miR-519d-3p和miR-519d-3p对MMP2的靶向调控作用。结果:32例肺腺癌组织中TTN-AS1的表达水平显著高于对应癌旁正常组织(P<0.05)。沉默A549细胞中TTN-AS1的表达可抑制细胞的活力和侵袭。TTN-AS1可通过海绵吸附的方式负调控miR-519d-3p的表达;MMP2是miR...     

lncRNA TDRG1通过调节miR-101-3p促进结直肠癌细胞增殖、侵袭和迁移

目的:研究长链非编码RNA(lncRNA)睾丸发育相关基因1(TDRG1)对结直肠癌(CRC)细胞增殖、侵袭和迁移的影响,并探讨其作用机制是否与微小RNA-1010-3p(miR-101-3p)相互作用有关.方法:收集40对CRC组织及相应的癌旁组织.采用RT-qPCR方法检测TDRG1和miR-101-3p在CRC组...     

lncRNA HCG18调节miR-3619-5p/ITGB2轴对乳腺癌细胞迁移和侵袭的影响

目的 探讨长链非编码RNA(lnc RNA)人类白细胞抗原复合体18(HCG18)能否通过调控微小RNA(mi R)-3619-5p/整合素β2(ITGB2)轴参与乳腺癌细胞的迁移和侵袭。方法 体外培养人乳腺癌MCF-7细胞系及人乳腺上皮MCF-10A细胞系,qRT-PCR和Westernblot检测lncRNAHCG18、miR-3619-5p、ITGB2的表达水平;Starbase数据库预测lncRNA HCG18、ITGB2与miR-3619-5p的结合位点;利用转染技术将MCF-7细胞分为Control组、si-NC组、siHCG18组、si-HCG18+inhibitor NC组、si-HCG18+miR-3619-5p inhibitor组、miR-NC组、miR-3619-5p mimics组、miR-3619-5p mimics+pcDNA-NC组、miR-3619-5p mimics+ITGB2组,qRT-PCR和Western blot技术检测各组lncRNA HCG18、miR-3619-5p与ITGB2的表达水平,CCK-8、细胞划痕和Transwell实验分别...     

长链非编码RNA PVT1调控miR-551通过Wnt信号通路对卵巢癌迁移和侵袭的影响

目的:探讨长链非编码RNA PVT1在卵巢癌组织中的表达情况及其在卵巢癌细胞迁移和侵袭过程中的作用及机制。方法:q PCR检测卵巢癌和正常卵巢组织及不同卵巢癌细胞中PVT1的表达情况;Transwell侵袭实验和细胞划痕实验分别检测沉默PVT1后卵巢癌细胞侵袭和迁移能力的变化;双萤光素酶报告基因检测PVT1与微小RNA(miR)-551的相互作用;Transwell侵袭实验和细胞划痕实验分别检测沉默PVT1后miR-551-inhibitor对卵巢癌细胞侵袭和迁移能力的影响;Western blot法检测沉默PVT1后Wnt信号通路相关蛋白的表达情况。裸鼠皮下成瘤实验检测沉默PVT1对卵巢癌成瘤重量及体积的影响。结果:与正常卵巢组织相比,卵巢瘤组织中PVT1表达明显增高(P0.05);卵巢癌细胞株ES-2中PVT1表达水平最高(P0.05);沉默PVT1可以抑制卵巢癌细胞侵袭和迁移能力;PVT1能与miR-551的位点特异性结合;沉默PVT1后,miR-551-inhibitor可以促进卵巢癌细胞侵袭和迁移能力;沉默PVT1后Wnt信号通路蛋白的表达相应下调;与阴性对照组相比,PVT1-siRNA组荷瘤小鼠肿瘤体积和重量都明显减小(P0.05)。结论:PVT1在卵巢癌发生发展过程中起重要作用,它可以靶向调节miR-551,通过Wnt信号通路调控卵巢癌细胞的侵袭和迁移能力。     

抑制lncRNA LINC01503通过靶向调控miR-335-5p对肺癌细胞活力、迁移和侵袭的影响及其机制研究

目的:探讨长链非编码RNA(lncRNA)LINC01503对肺癌细胞活力、迁移和侵袭的影响及其作用机制。方法:将人肺癌H1299细胞分为si-NC组(转染si-NC)、si-LINC01503组(转染si-LINC01503)、pcDNA组(转染pcDNA)、pcDNA-LINC01503组(转染pcDNA-LINC01503)、miR-NC组(转染miR-NC)、miR-335-5p组(转染miR-335-5p mimics)、si-LINC01503+anti-miR-NC组(共转染si-LINC01503和anti-miR-NC)、si-LINC01503+anti-miR-335-5p组(共转染si-LINC01503和anti-miR-335-5p)、miR-NC+WT-LINC01503组(共转染miR-NC和WT-LINC01503)、miR-NC+MUT-LINC01503组(共转染miR-NC和MUT-LINC01503)、miR-335-5p+WT-LINC01503组(共转染miR-335-5p和WT-LINC01503)和miR-335-5p+MUT-LINC...     

lncRNA-MALAT1通过靶向下调miR-570-3p促进胃癌细胞增殖

目的:探讨长链非编码RNA MALAT1(lncRNA-MALAT1)是否可通过靶向下调微小RNA-570-3p(miR-570-3p)促进胃癌细胞增殖。方法:将体外培养的人胃癌细胞株SGC7901分为3组:空白对照组、si-MALAT1组和si-MALAT1 NC组,其中空白对照组为单纯的SGC7901细胞株,si-MALAT1组和si-MALAT1 NC组分别转染lncRNA-MALAT1 siRNA及其阴性对照。MTS法检测各组细胞的增殖情况。RT-qPCR检测单纯的SGC7901细胞株培养不同时点的miR-570-3p及不同组别lncRNA-MALAT1和miR-570-3p的表达情况。通过生物信息学软件RegRNA预测获取lncRNA-MALAT1与miR-570-3p潜在的互补结合位点。将MALAT1及其突变体克隆到萤光素酶载体psiCHECK-2中,构建MALAT1野生型和突变型质粒,并采用酶切和测序方法鉴定psi CHECK-2-MALAT1载体是否构建成功。将MALAT1野生型和突变型质粒分别与miR-570-3p模拟物、miR-570-3p抑制剂、miR-570-3p模拟物阴性对照、miR-570-3p抑制剂阴性对照在293T细胞中共转染,收集细胞后通过双萤光素酶报告系统检测不同组别的萤光素酶活性,从而对lncRNA-MALAT1与miR-570-3p的靶向调节关系进行验证。结果:与空白对照组和si-MALAT1NC组相比较,si-MALAT1组在不同时点(24、48和72 h)的A490值显著降低(P 0. 01)。在单纯的SGC7901细胞株中,随着时间的推移,miR-570-3p的表达量逐渐下降(P 0. 05)。si-MALAT1组lncRNA-MALAT1的表达水平显著降低,而miR-570-3p表达显著升高(P 0. 01)。双萤光素酶报告基因检测显示,与miR-570-3p模拟物阴性对照组相比,miR-570-3p模拟物组MALAT1野生型报告基因的萤光素酶活性显著降低(P 0. 01),而miR-570-3p抑制剂组MALAT1野生型报告基因的萤光素酶活性较miR-570-3p模拟物组明显增高(P 0. 01); miR-570-3p模拟物、miR-570-3p抑制剂、miR-570-3p模拟物阴性对照及miR-570-3p抑制剂阴性对照对MALAT1突变型的表达均无明显影响。结论:lncRNA MALAT1能够通过靶向结合并下调miR-570-3p促进胃癌细胞增殖。     

miR-146b-5p promotes VSMC proliferation and migration

Vascular smooth muscle cells (VSMCs) play pivotal roles in the development of vascular diseases. While microRNAs are important in vascular pathologies, a few is known about their functional roles in VSMC phenotypes. We profiled microRNA expression in PDGF-BB treated VSMCs and found microRNA-146b-5p (miR-146b-5p) was upregulated. Inhibition of miR-146b-5p blocked in response to PDGF while reducing VSMC proliferation and migration. These studies implicate miR-146b-5p as necessary for PDGF-induced VSMC phenotype transition. Downstream miR-146b-5p targets modulating VSMC phenotypes will be further identified. Our study will help to understand the role of VSMCs in the pathology of vascular diseases.     

MicroRNA-146b-5p suppresses cholangiocarcinoma cells by targeting TRAF6 and modulating p53 translocation

BackgroundIn view of the poor prognosis and high mortality of cholangiocarcinoma, there is a need for new therapeutic strategies. This study aims to reveal the biological function of miR-146b-5p in cholangiocarcinoma cell and its possible mechanism.MethodsThe expression level and prognostic information on miR-146b-5p in cholangiocarcinoma were obtained in TCGA database. The biological function of miR-146b-5p on proliferation and vitality of cholangiocarcinoma cell HUCCT-1 was examined by EdU and MTT assay, and the apoptosis of HUCCT-1 cells transfected with miR-146b-5p mimic, mimic control, inhibitor, inhibitor control was detected by flow cytometry analysis. The western blot was done to evaluate the effect of miR-146b-5p targeting substrate and the expression of p53 in whole-cell protein and mitochondria fractions.ResultsOur finding revealed that miR-146b-5p expression in patients with CHOL was lower than the normal group(p＜0.001). MiR-146b-5p expression was down-regulated in human cholangiocarcinoma HUCCT-1 and RBE cells compared to normal control HIBEC and other cancer cells. The miR-146b-5p mimic could inhibit HUCCT-1 cell proliferation (p＜0.05) and promote HUCCT-1 cell apoptosis significantly (p＜0.05). The results of western blot showed that miR-146b-5p mimic could directly target TRAF6 3′UTR region and up-regulate the expression of p53 in mitochondria and miR-146b-5p inhibitor could down-regulated the level of p53 in mitochondria.ConclusionMiR-146b-5p is a cholangiocarcinoma suppressor by inhibiting cell proliferation and promoting cell apoptosis with targeting TRAF6, possibly via modulating p53 translocation to mitochondria.     

miR-128-3p过表达靶向MAPK1抑制膀胱癌5637细胞株的侵袭，迁移和上皮间质转化

目的　研究miR-128-3p过表达对膀胱癌5637细胞株的侵袭,迁移和上皮间质转化影响。 方法　基因预测软件TargetScan筛选出miR-128-3p的靶基因,荧光素酶报告实验验证;RT-PCR检测miR-128-3p和MAPK1的表达,Transwell检测细胞侵袭情况,划痕实验检测细胞迁移能力,Western blot检测E-cadherin、N-cadherin、ERK1/2、c-Myc和c-fos的表达,免疫荧光检测Vimentin的表达;裸鼠皮下注射建立移植瘤模型,30 d后检测瘤重量,绘制存活曲线,检测移植瘤中Vimentin、miR-128-3p、MAPK1、ERK1/2、c-Myc和c-fos的量。 结果　miR-128-3p靶向抑制MAPK1表达;miR-128-3p过表达后,侵袭细胞数目、伤口愈合率降低,E-cadherin表达上调,N-cadherin表达下调,Vimentin阳性率减少,p-ERK1/2、c-Myc和c-fos表达下调。经miR-128-3p干预,裸鼠体内移植瘤重量减轻,存活率增加,miR-128-3p表达上调,MAPK1的表达下调,Vimentin阳性率减少,p-ERK1/2、c-Myc和c-fos表达下调。 结论　过表达miR-128-3p通过靶向抑制MAPK1表达来抑制膀胱癌细胞5637的侵袭能力、迁移能力、上皮-间充质转化和ERK1/2、c-Myc和c-fos通路。     

miR-128-3p过表达靶向MAPK1抑制膀胱癌5637细胞株的侵袭，迁移和上皮间质转化

目的　研究miR-128-3p过表达对膀胱癌5637细胞株的侵袭,迁移和上皮间质转化影响。 方法　基因预测软件TargetScan筛选出miR-128-3p的靶基因,荧光素酶报告实验验证;RT-PCR检测miR-128-3p和MAPK1的表达,Transwell检测细胞侵袭情况,划痕实验检测细胞迁移能力,Western blot检测E-cadherin、N-cadherin、ERK1/2、c-Myc和c-fos的表达,免疫荧光检测Vimentin的表达;裸鼠皮下注射建立移植瘤模型,30 d后检测瘤重量,绘制存活曲线,检测移植瘤中Vimentin、miR-128-3p、MAPK1、ERK1/2、c-Myc和c-fos的量。 结果　miR-128-3p靶向抑制MAPK1表达;miR-128-3p过表达后,侵袭细胞数目、伤口愈合率降低,E-cadherin表达上调,N-cadherin表达下调,Vimentin阳性率减少,p-ERK1/2、c-Myc和c-fos表达下调。经miR-128-3p干预,裸鼠体内移植瘤重量减轻,存活率增加,miR-128-3p表达上调,MAPK1的表达下调,Vimentin阳性率减少,p-ERK1/2、c-Myc和c-fos表达下调。 结论　过表达miR-128-3p通过靶向抑制MAPK1表达来抑制膀胱癌细胞5637的侵袭能力、迁移能力、上皮-间充质转化和ERK1/2、c-Myc和c-fos通路。     

微小RNA-513c-5p在宫颈癌中的表达及靶向组蛋白去乙酰化酶1调节宫颈癌细胞迁移和侵袭的机制

目的 探讨微小RNA（miR)-513c-5p在宫颈癌中的表达及靶向组蛋白去乙酰化酶1（HDAC1）调节宫颈癌细胞迁移和侵袭的机制。方法 临床收集宫颈癌患者86例,通过Real-time PCR检测肿瘤组织和癌旁组织中miR-513c-5p水平,分析其与宫颈癌病理特征的关系。通过双荧光素酶报告验证miR-513c-5p靶向HDAC1。将宫颈癌HeLa细胞系分为4组：对照组、类似物(mimic)组、mimic+HDAC1组和HDAC1组。通过质粒转染技术过表达miR-513c-5p和(或)HDAC1。Real-time PCR和Western blotting分别用于检测RNA或蛋白的表达水平。分别通过CCK-8法、细胞划痕实验和Transwell实验检测各组的细胞生长、迁移和侵袭能力。 结果 宫颈癌组织中miR-513c-5p水平显著低于癌旁组织。低水平的miR-513c-5p与更高的局部侵袭、淋巴转移和远端转移有关（P<0.05）。miR-513-5p靶向抑制HDAC1表达。过表达miR-513c-5p显著抑制宫颈癌细胞生长、迁移和侵袭（P<0.05）。过表达HDAC1促进细胞生长、迁移和侵袭（P<0.05）,并且可以逆转miR-513c-5p的抑制作用（P<0.05）。 结论 低水平的miR-513c-5p可能与宫颈癌转移有关,并且miR-513c-5p可通过靶向抑制HDAC1蛋白的表达抑制宫颈癌HeLa细胞生长、迁移和侵袭。     

miR-26b-5p suppresses proliferation and promotes apoptosis in multiple myeloma cells by targeting JAG1

Background

Though the levels of diagnosis and treatment of multiple myeloma (MM) have been largely improved recent years, the prognosis of these patients remain unacceptable. It is urgent for us to discover the exact mechanism and determine some new indicators for MM. MiRNAs play a critical role in the occurrence and progression of cancers, including MM. MiR-26b-5p has been reported to be closely related to cells proliferation in human pulmonary cancer, hepatocellular carcinoma and so on.