miR-338-3p靶向PTP1B抑制胃癌细胞迁移和侵袭

目的:探讨miR-338-3p和PTP1B对胃癌细胞迁移和侵袭的影响.方法:Western Blot法测定PTP1B在胃癌标本及癌旁组织中的表达.通过qRT-PCR检测miR-338-3p的表达.用PTP1B质粒和siRNA、miR-338-3p类似物转染SGC7901细胞,用Transwell法测定miR-338-3...     

miR-886-5p抑制肝细胞癌细胞侵袭与迁移

目的:探讨miR-886-5p在肝细胞癌(hepatocellular carcinoma,HCC)中的表达水平及其与临床病理特征的关系,并分析miR-886-5p对HCC细胞侵袭与迁移能力的影响.方法:应用Real-time PCR技术检测HCC组织和细胞系中miR-886-5p的表达水平;分析miR-886-5p的表达水平与HCC临床病理特征的关系;应用Transwell实验探究miR-886-5p对HCC细胞侵袭与迁移能力的影响.结果:miR-886-5p在HCC组织中的表达水平较癌旁组织明显降低(P＜0.05),miR-886-5p在HCC细胞系中(Hep3B、MHCC-97L、HepG2、SMMC-7721)的表达水平较正常肝细胞LO2显著下调(P＜0.05);miR-886-5p的表达水平与肿瘤数目、静脉侵犯、Edmondson病理分级及TNM分期显著相关(P＜0.05);Transwell小室实验表明miR-886-5p能够显著抑制HCC细胞的侵袭与迁移能力.结论:miR-886-5p在HCC中表达下调,其能够抑制HCC细胞的侵袭与迁移.     

miR-125a-5p通过下调BAG4表达抑制胃癌细胞迁移和侵袭

目的:探讨miR-125a-5p通过调控Bcl-2相关永生基因4(Bcl-2-associated athanogene 4,BAG4)的表达抑制胃癌细胞迁移和侵袭的分子机制.方法:选用2014年1月至2015年12月兰州大学第一医院手术切除的82例胃癌组织标本及配对的癌旁组织以及人胃癌细胞系MGC803、BGC823...     

miR-369-5p抑制肝细胞癌细胞增殖、迁移及侵袭

目的:探讨miR-369-5p在肝细胞癌(hepatocellular carcinoma,HCC)中的表达情况、临床意义,观察miR-369-5 p对HCC细胞增殖、迁移及侵袭的影响及其作用机制.方法:实时定量PCR检测miR-369-5p在HCC组织与相应癌旁组织、正常肝细胞(L02)与HCC细胞系中的表达情况;C...     

miR-1180-5p通过激活CDKN1A基因表达抑制前列腺癌细胞增殖、迁移和侵袭

目的：研究微小RNA-1180-5p（miR-1180-5p）对前列腺癌细胞株VCAP和LNCaP恶性生物行为的影响及可能的作用机制。方法：合成dsControl （dsControl 组）和miR-1180-5p（miR-1180-5p 组）,分别转染至两个前列腺癌细胞株VCAP和LNCaP。采用qPCR 和Western blotting 分析转染后各组细胞CDKN1A、Cyclin D1 和CDK6 mRNA及蛋白的表达变化,采用流式细胞术、MTT法、平板克隆实验和Transwell 实验分别检测细胞周期分布、增殖活力、克隆形成能力、细胞迁移和侵袭能力。结果：qPCR结果显示,相比dsControl,转染miR-1180-5p 后VCAP 和LNCaP 细胞中CDKN1A mRNA 表达明显上调(P<0.01);Cyclin D1 和CDK6 mRNA表达明显下调(P<0.05 或P<0.01)。Western blotting 与qPCR 结果相符。转染miR-1180-5p 后VCAP和LNCaP 位于G0/G1 期的细胞比例增加(P<0.01),而位于S 期和G2/M期的细胞比例减少(P<0.05),细胞周期被阻滞在G0/G1 期。转染miR-1180-5p 后,两种前列腺癌细胞增殖活力较dsControl 组明显降低(P<0.05),miR-1180-5p 组两种细胞的克隆数量明显较少（P<0.01）,同时miR-1180-5p 组两组细胞迁移和侵袭能力均下降（P<0.01）。结论：miR-1180-5p 能显著激活前列腺癌细胞中CDKN1A基因的表达,从而抑制前列腺癌细胞的增殖、迁移和侵袭等恶性生物行为。     

miR-875-5p通过靶向USF2抑制胃癌细胞的增殖、迁移和侵袭

目的:探讨miR-875-5p对胃癌细胞增殖、迁移和侵袭的影响及其机制。方法:采用qPCR法检测胃癌细胞BGC-823、HGC-27、MGC-803、SGC-7901、AGS、MKN-45和胃黏膜上皮细胞GES-1中miR-875-5p的表达水平。利用脂质体转染技术,分别将miR-875-5p模拟物/抑制剂(mimic/inhibitor)及其阴性对照质粒(miR-NC/Anti-miR-NC)转染至AGS细胞/MKN-45细胞,构建过表达/抑制miR-875-5p的细胞模型,空白对照组(Control组)不转染。通过CCK-8、克隆形成、Transwell等实验分别检测miR-875-5p表达变化对细胞增殖、克隆形成、迁移和侵袭的影响。采用双荧光素酶报告基因实验验证miR-875-5p与上游刺激因子2(USF2)的靶向关系,WB实验验证miR-875-5p对USF2的调控作用并检测USF2蛋白的表达。构建MKN-45细胞裸鼠移植瘤模型,验证miR-875-5p过表达对MKN-45细胞成瘤能力的影响。结果:miR-875-5p在6种胃癌细胞中表达水平显著低于胃黏膜上皮细胞GES-1(均P<0.01)。与Control组和miR-NC组相比,miR-875-5p mimic组AGS细胞的增殖、克隆形成率、迁移和侵袭细胞数,以及USF2蛋白的表达均显著降低(P<0.05或P<0.01);miR-875-5p inhibitor组MKN-45细胞的增殖、克隆形成率、迁移和侵袭细胞数,以及USF2蛋白的表达均显著提高(P<0.05或P<0.01)。双荧光素酶报告基因实验证明,miR-875-5p能够直接靶向USF2基因。体内成瘤实验结果表明,过表达miR-875-5p显著抑制MKN-45细胞移植瘤的生长(均P<0.01)。结论:miR-875-5p通过靶向USF2抑制胃癌细胞的增殖、迁移和侵袭。     

microRNA let-7f-5p对胃癌细胞系GC9811迁移和侵袭能力的影响

目的:探讨转染let-7f-5p mimics/inhibitor对胃癌细胞系GC9811迁移和侵袭能力的影响 。方法:用实时定量聚合酶链反应(RT-PCR)的方法在mRNA水平测定转染let-7f-5p mimics/inhibitor及其阴性对照后let-7f-5p表达水平的变化;以Transwell实验检测转染let-7f-5p mimics/inhibitor后迁移和侵袭能力有无变化。结果:RT-PCR结果显示:转染let-7f-5p mimics可明显上调GC9811细胞let-7f-5p的表达;转染let-7f-5p inhibitor可明显下调GC9811细胞let-7f-5p的表达。Transwell实验结果显示与对照组相比转染let-7f-5p mimics的GC9811细胞迁移和侵袭能力明显减弱;与对照组相比转染let-7f-5p inhibitor的GC9811细胞迁移和侵袭能力明显增强。结论:microRNA let-7f-5p能够抑制胃癌细胞GC9811的迁移和侵袭能力。     

miRNA423-5p regulates cell proliferation and invasion by targeting trefoil factor 1 in gastric cancer cells

TFF1 is a small, secreted protein in the TFF family that has a pivotal role as a motogenic factor in epithelial restitution and cell motility, and as a tumor suppressor gene in the stomach. In this study, we identified TFF1 as a novel target gene of miRNA-423-5p. miRNA-423-5p negatively regulated the expression of TFF1 by binding to its 3′UTR and participated in proliferation/invasion-related processes via a TFF1-dependent manner in gastric cancer cells. Our findings suggested that miR-423-5p may be a novel target for the future development of specific therapeutic interventions for gastric cancer.     

miR-138-5p通过靶向TCF3实现对胃癌细胞SGC-7901侵袭和迁移的调控

目的:探讨miR-138-5p 与T细胞因子3 基因（T cell factor 3, TCF3）的靶向关系及其对人胃癌细胞SGC-7901 侵袭和迁移能力的影响。方法：miR-138-5p 模拟物转染SGC-7901 细胞后,实时荧光定量PCR（qRT-PCR）检测miR-138-5p 和TCF3 mRNA的相对表达;生物信息学方法预测miR-138-5p 与TCF3 基因的靶向匹配关系,采用荧光素酶报告基因系统鉴定该关系。miR-138-5p 转染正常胃癌细胞和TCF3 高表达胃癌细胞后,Western blotting 检测TCF3、神经钙黏蛋白（N-cadherin）、波形蛋白（Vimentin）、锌指转录因子（Slug）和上皮型钙黏蛋白（E-cadherin）的表达,Transwell 小室检测胃癌细胞侵袭能力,划痕实验检测细胞迁移能力。结果：miR-138-5p 过表达抑制TCF3 mRNA的表达;生物信息学软件预测显示miR-138-5p 与TCF3 mRNA有靶向结合区域,miR-138-5p mimic 降低TCF3 野生型质粒的荧光素酶活性,不影响TCF3 突变型质粒的荧光素酶活性。miR-138-5p 抑制TCF3 蛋白表达,miR-138-5p 减弱TCF3 过表达对SGC-7901 细胞侵袭和迁移能力的促进作用,同时其下调N-cadherin、Vimentin 和Slug 蛋白表达、上调E-cadherin 蛋白表达。结论：miR-138-5p 抑制胃癌细胞SGC-7901 的侵袭和迁移,与直接靶向调控TCF3 的表达有关。     

microRNA-627-5p inhibits colorectal cancer cell proliferation,migration and invasion by targeting Wnt2

BACKGROUND microRNA-627-5p(miR-627-5p) dysregulation has been observed in several cancer types, such as hepatocellular carcinoma, oral squamous cell carcinoma,glioblastoma multiforme, and gastric cancer. The biological function of miR-627-5p in colorectal cancer(CRC) growth and metastasis is yet unclear.AIM To investigate the effects of miR-627-5p on the malignant biological properties of colorectal malignant tumour cells by targeting Wnt2.METHODS The levels of miR-627-5p in colorectal tumour ti...     

MiR-873-5p targets THUMPD1 to inhibit gastric cancer cell behavior and chemoresistance

BackgroundGastric cancer is one of the most common gastrointestinal tumors. Evidence has pointed to the fact that miRNAs play critical roles in the occurrence, development, and metastasis of gastric cancer by regulating cell proliferation, differentiation, apoptosis, and invasion.MethodsIn this study, first the relationship of miR-873-5p level and tissues types/LN(+/-)/metastasis(+/-)/tumor size was analysis, respectively. Second, the CCK8 and Transwell assay was used to determine the proliferation, invasion and migration of GC cells transfected with overexpression-/low expression-miR-873-5p. Third, the cell viability were analysis in the GC cells transfected with overexpression-/low expression-miR-873-5p treatment with different chemotherapy drugs. Fourth, the target gene of miR-873-5p was predicted using bioinformation methods. Fifth, the relationship of miR-873-5p with target gene-THUMPD1 were explored by using Wb and luciferase activity assay, et al.ResultsWe confirmed that miR-873-5p was negatively correlated with GC including tumor size, LN metastasis, distant metastasis. The miR-873-5p enhanced the sensitivity of Doxorubicin/Fluorouracil and cisplatin. The THUMPD1 was the target gene of miR-873-5p. Moreover, miR-873-5p could target the THUMPD1 axis so as to inhibit gastric cancer cell behavior as well as chemoresistance.ConclusionsMiR-873-5p plays a role in regulating cell behavior as well as regulating chemoresistance in gastric cancer. In addition, THUMPD1, as a downstream molecule of miR-873-5p, plays an important role in the cell behavior and chemoresistance of gastric cancer. The research first confirmed that miR-873-5p could inhibit gastric cancer cell behavior and chemoresistance by targeting the THUMPD1.     

MiR-625-3p promotes cell migration and invasion via inhibition of SCAI in colorectal carcinoma cells

MicroRNAs (miRNAs) play a critical role in controlling tumor invasion and metastasis via regulating the expression of a variety of targets, which act as oncogenes or tumor suppressor genes. Abnormally expressed miR-625-3p has been observed in several types of human cancers. However, the molecular mechanisms of miR-625-3p-mediated tumorigenesis are largely elusive. Therefore, the aim of this study was to evaluate the biological function and molecular insight on miR-625-3p-induced oncogenesis in colorectal carcinoma (CRC). The effects of miR-625-3p in cell migration and invasion were analyzed by wound healing assay and transwell assay, respectively. In addition, the expression of miR-625-3p and its targets was detected in five human CRC cell lines. In the present study, we found that overexpression of miR-625-3p promoted migration and invasion in SW480 cells, whereas downregulation of miR-625-3p inhibited cell motility in SW620 cells. More importantly, we observed potential binding sites for miR-625-3p in the 3′-untranslated region of suppressor of cancer cell invasion (SCAI). Notably, we identified that overexpression of miR-625-3p inhibited the expression of SCAI, while depletion of miR-625-3p increased SCAI level, suggesting that SCAI could be a target of miR-625-3p. Additionally, we revealed that miR-625-3p exerts its oncogenic functions through regulation of SCAI/E-cadherin/MMP-9 pathways. Our findings indicate the pivotal role of miR-625-3p in invasion that warrants further exploration whether targeting miR-625-3p could be a promising approach for the treatment of CRC.     

miR-885-5p通过靶向CTNNB1抑制胰腺癌细胞增殖、迁移和侵袭

目的:探讨miR-885-5p对胰腺癌细胞增殖、迁移和侵袭的影响,并阐明miR-885-5p和CTNNB1基因在胰腺癌细胞中的作用机制。方法:MTT、细胞划痕和Transwell实验测定各组细胞增殖、迁移与侵袭能力。双荧光素酶报告基因实验分析CTNNB1是否为miR-885-5p的靶基因。使用胰腺癌TCGA数据进行预后分析,并进行miR-885-5p与CTNNB1表达的相关性分析。结果:下调miR-885-5p明显促进胰腺癌细胞增殖、迁移与侵袭,而过表达miR-885-5p则相反。miR-885-5p可靶向CTNNB1 3' UTR并抑制其转录后表达。在下调miR-885-5p的细胞中进行回复性实验,结果表明,miR-885-5p对胰腺癌细胞增殖、迁移与侵袭的抑制作用部分依赖于CTNNB1。TCGA数据库结果显示,miR-885-5p高表达的胰腺癌患者有较好的预后,且与CTNNB1表达呈负相关。结论:miR-885-5p通过靶向CTNNB1抑制胰腺癌细胞增殖、迁移与侵袭,miR-885-5p有望成为胰腺癌治疗的新靶点。     

miR-122-5p通过靶向CREB1抑制食管癌细胞及移植瘤的生长

背景与目的:miR-122在多种肿瘤中表达异常,参与肿瘤细胞增殖、凋亡等,而cAMP反应元件结合蛋白1(cAMP response element-binding protein 1,CREB1)参与食管癌发展过程,研究miR-122-5p通过靶向CREB1对食管癌细胞及移植瘤生长的作用及机制.方法:选取2017年11...     

miR-383-5p通过下调MSH6抑制小儿髓母细胞瘤的增殖和侵袭

目的：探究miR-383-5p通过调控DNA错配修复基因MSH6对小儿髓母细胞瘤（medulloblastoma,MB）增殖和侵袭的影响。方法：选取2014年7月至2017年5月于我院肿瘤外科手术切除并经病理确诊为MB的15例患者癌组织及相应的癌旁组织标本,qPCR检测MB组织和细胞系中miR-383-5p的表达水平。将实验分为对照组（NC组）、miR-383-5p过表达组（miR-383-5p组）、MSH6 敲降组（si-MSH6 组）及 MSH6+miR-383-5p 同时敲降组（miR-383-5p inhibitor+si-MSH6）,采用 CCK-8 法检测 UW473细胞的增殖活性,Transwell法检测UW473细胞侵袭和迁移能力,双荧光素酶报告基因验证miR-383-5p与MSH6的靶向关系,Western blotting（WB）法检测 MSH6 的表达水平。结果：miR-383-5p 在 MB 组织和细胞系中表达水平显著低于癌旁组织（均P<0.05或P<0.01）;过表达miR-383-5p显著抑制UW473细胞增殖、迁移和侵袭（均P<0.05或P<0.01）,且下调MSH6在UW473细胞中的表达水平（P<0.01）。双荧光素酶报告基因结果证实 miR-383-5p 靶向结合 MSH6 的 3''UTR,敲降 MSH6 可抑制UW473 细胞增殖、侵袭和迁移（均P<0.01）。进一步实验证明,同时敲降miR-383-5p和MSH6能够恢复敲降MSH6对UW473细胞增殖、侵袭和迁移的抑制作用（均P<0.01）。结论：miR-383-5p在MB组织和细胞系中低表达,其通过靶向下调MSH6表达水平进而抑制UW473细胞的增殖、迁移及侵袭。     

miR-9-5p靶向FGF9抑制胃癌细胞迁移侵袭的作用机制

目的:探讨miR-9-5p在胃癌组织中的表达及对胃癌细胞株SGC7901、AGS细胞迁移和侵袭影响的作用机制。方法:real-time PCR和Western blot检测癌旁组织、胃癌组织及其细胞系中miR-9-5p和FGF9的表达；Transwell小室检测过表达miR-9-5p或敲除FGF9对SGC7901和AGS细胞迁移和侵袭能力的影响；TargetScan在线分析、双荧光素酶报告基因和Western blot实验验证miR-9-5p和FGF9的靶向关系；将转染后的SGC7901细胞分为对照（NC）组和实验（miR-9-5p）组接种于裸鼠右侧腋窝皮下，观察记录裸鼠成瘤情况并绘制生长曲线。结果:与癌旁组织相比，胃癌组织及其细胞系中miR-9-5p表达下调、FGF9表达上调（P＜0.05）；过表达miR-9-5p或敲除FGF9能抑制SGC7901、AGS细胞迁移和侵袭；TargetScan在线分析、双荧光素酶报告基因和Western blot实验表明miR-9-5p能调控FGF9表达；miR-9-5p组细胞成瘤速度较NC组慢（P＜0.05），肿瘤体积及重量小（P＜0.05）。结论:miR-9-5p在胃癌组织中表达下调，过表达miR-9-5p可抑制FGF9表达，从而抑制胃癌细胞的迁移和侵袭，减缓肿瘤生长。     

miR-139-5p通过靶向Notch1抑制上皮性卵巢癌细胞的增殖与侵袭

目的：探讨miR-139-5p靶向Notch1抑制上皮性卵巢癌（epithelial ovarian cancer,EOC）细胞增殖和侵袭的作用机制。方法：选取2018年1月至2018年12月在河南省南阳市中心医院妇科手术切除的24例EOC患者的癌和相应的癌旁组织标本,以及人卵巢癌细胞系SKOV3、ES2、HEY-T30和人卵巢上皮细胞株IOSE80,用qPCR检测EOC组织和细胞系中miR-139-5p和Notch1 mRNA的表达。将过表达miR-139-5p载体、重组质粒pLV-Notch1转染至SKOV3细胞,并设置空白对照组（Ctrl组）和阴性对照组（NC组）,用双荧光素酶报告基因实验验证miR-139-5p与Notch1 3’-UTR靶向关系,用CCK-8、Transwell、划痕愈合实验分别检测细胞的增殖、侵袭和迁移能力,用Western blotting检测细胞中增殖和迁移相关蛋白的表达。结果：与癌旁组织和IOSE80细胞比较,EOC组织和细胞系中miR-139-5p表达显著降低、Notch1 mRNA表达显著升高（均P<0.01）。双荧光素酶报告基因实验结果证实,Notch1是miR-139-5p的靶基因。与NC组比较,miR-139-5p mimic组3 d时SKOV3细胞的增殖、侵袭、迁移能力和Notch1、NICD、Cyclin D1、Cyclin A1、Snail1、β-catenin及N-cadherin表达水平均明显降低（均P<0.01）,E-cadherin表达水平明显升高（P<0.01）;同时过表达Notch1可逆转miR-139-5p抑制SKOV3细胞增殖、侵袭与迁移的作用。结论：miR-139-5p可靶向Notch1抑制EOC细胞的增殖、侵袭和迁移能力,可能与其下调NICD、Cyclin D1、Cyclin A1、Snail1、β-catenin、N-cadherin而上调E-cadherin的表达水平有关。