lncRNA SNHG3 acts as oncogene in ovarian cancer through miR-139-5p and Notch1

Ovarian cancer (OC) is a common malignant tumor of the female reproductive system. Long non-coding RNAs (lncRNAs) play an important role in OC occurrence and development. Thus, the function and potential mechanism of lncRNA small nucleolar RNA host gene 3 (SNHG3) was explored in the development of OC. The expression of SNHG3, microRNA (miR)-139-5p and Notch homolog 1, translocation-associated (Drosophila) (Notch1) in OC were detected by RT-qPCR or western blot assay. In addition, CCK-8 and wound-healing assays were used to detect OVCAR3 proliferation and migration ability. The targeting relationship of miR-139-5p with SNHG3 or Notch1 was verified through luciferase reporter assay. Rescue experiments were performed to confirm whether SNHG3 could mediate OVCAR3 proliferation and migration through miR-139-5p and Notch1. In OC tissues and cell lines, the expression of SNHG3 and Notch1 were significantly increased, and the expression of miR-139-5p was significantly decreased. SNHG3 inhibition suppressed the proliferation and migration of OVCAR3 cells. Luciferase reporter experiment confirmed that miR-139-5p could target SNHG3 and Notch1. Transfection of miR-139-5p inhibitor significantly reversed the inhibitory effect of SNHG3 knockdown on OVCAR3 proliferation and migration. Moreover, SNHG3 inhibition or miR-139-5p mimic abolished the promotion of Notch1 overexpression on OVCAR3 proliferation and migration. In conclusion, SNHG3 could accelerate the proliferation and migration of OC cells by regulating miR-139-5p and Notch1.     

LncRNA SNHG20通过miR-520f-3p调控胆管癌细胞增殖和侵袭

目的 探讨lncRNA SNHG20和miR-520f-3p对胆管癌细胞增殖和侵袭的影响及其潜在的作用机制.方法 收集2012年3月至2014年3月在哈尔滨医科大学附属第二医院手术切除的20例胆管癌患者肿瘤组织及相应癌旁组织,利用脂质体转染技术分别将si-SNHG20、miR-520f-3p mimics和miR-52...     

lncRNA SNHG11通过吸附miR-193a-5p促进NSCLC细胞A549的恶性生物学行为

目的：探讨lncRNA SNHG11对非小细胞肺癌（NSCLC）A549细胞增殖、侵袭和迁移的影响及其可能机制。方法:qPCR检测人胚肺细胞HEL-1和NSCLC细胞A549、H1299、HCC827中lncRNA SNHG11和miR-193a-5p的表达水平,向A549细胞中转染SNHG11小干扰RNA(si-SNHG11)、miR-193a模拟物（miR-193a mimic）或miR-193a抑制剂（miR-193a inhibitor）后,CCK-8法检测其对细胞增殖的影响,Transwell小室和细胞划痕实验检测对细胞侵袭和迁移的影响,WB法检测对细胞增殖抗原Ki67、细胞周期蛋白D1(cyclin D1)表达的影响,双荧光素酶报告实验验证lncRNA SNHG11与miR-193a-5p的靶向关系。结果：与人胚肺细胞HEL-1相比,NSCLC细胞A549、H1299、HCC827中lncRNA SNHG11均呈高表达、miR-193a-5p呈低表达（均P<0.05）;沉默lncRNA SNHG11可抑制A549细胞的增殖、侵袭和迁移,降低细胞中Ki67和Cyclin...     

lncRNASNHG10靶向调控miR-532-3p促进结直肠癌SW620细胞的侵袭和迁移

目的： 探讨lncRNA SNHG10在结直肠癌组织和细胞中的表达情况及其对结直肠癌细胞侵袭和迁移的影响与可能的机制。 方法： 收集2018年1月至2019年12月在河南省人民医院行根治性结直肠癌切除术的78例患者的癌组织及对应癌旁组织标本,采用qPCR法检测结直肠癌组织、结直肠癌细胞（SW480、SW620、HT-29和LoVo）及人正常结直肠黏膜细胞FHC中lncRNA SNHG10和miR-532-3p的表达水平,并分析其与结直肠癌患者临床病理特征的关系及在组织中表达的相关性。采用双荧光素酶报告基因实验验证lncRNA SNHG10和miR-532-3p间的靶向关系。向SW620细胞中转染si-SNHG10或miR-532-3p mimic或共转染si-SNHG10+miR-532-3p inhibitor,采用Transwell实验检测其侵袭和迁移能力的改变,采用WB法检测E-cadherin,N-cadherin和vimentin蛋白表达水平变化。 结果： SNHG10 在结直肠癌组织和细胞中呈高表达（P<0.05 或 P<0.01）,其表达水平与TNM分期和远处转移有关（均P<0.05）;miR-532-3p在结直肠癌组织和细胞中呈低表达,其表达水平与TNM分期、淋巴结转移和远处转移有关（P<0.05或P<0.01）,SNHG10和miR-532-3p在结直肠癌组织中的表达呈负相关（r=-0.225, P=0.048）。双荧光素酶报告基因实验证实SNHG10靶向调节miR-532-3p的表达。下调 SNHG10 或上调 miR-532-3p 的表达后,SW620 细胞的侵袭和迁移能力显著降低（P<0.01）,E-cadherin蛋白表达水平升高（P<0.05）、N-cadherin和vimentin蛋白表达水平降低（均P<0.05）。抑制miR-532-3p表达后,敲低lncRNA SNHG10表达对结直肠癌细胞侵袭和迁移的抑制作用被逆转（均P<0.05）。 结论： lncRNA SNHG10在结直肠癌中高表达并与TNM分期和远处转移相关,lncRNASNHG10靶向调控miR-532-3p表达并通过EMT途径影响结直肠癌细胞的侵袭和转移。     

lncRNA SNHG14通过靶向miR-433-3p调控甲状腺癌SW579细胞的恶性生物学行为

目的:探讨lncRNA SNHG14对甲状腺癌SW579细胞恶性生物学行为的影响及其分子机制。方法:收集2017年10月至2018年12月青海省人民医院收治的20例甲状腺癌患者的癌组织及癌旁组织标本,用qPCR检测甲状腺癌组织和对应癌旁组织中SNHG14与miR-433-3p的表达;根据转染物的不同,将SW579细胞分为si-NC组(转染si-NC)、si-SNHG14组(转染si-SNHG14)、miR-NC组(转染miR-NC)、miR-433-3p mimic组(转染miR-433-3p mimic)、si-SNHG14+anti-miR-NC组(共转染si-SNHG14与anti-miR-NC)和si-SNHG14+anti-miR-433-3p组(共转染si-SNHG14与anti-miR-433-3p)。MTT法、FCM、Transwell实验分别检测转染后SW579细胞的增殖能力、细胞周期、细胞凋亡率、迁移及侵袭能力的改变;利用双荧光素酶报告基因实验检测SNHG14是否可结合miR-433-3p,qPCR法检测SNHG14与miR-433-3p之间的相互调控关系。结果:S...     

LncRNA SNHG5 affects cell proliferation,metastasis and migration of colorectal cancer through regulating miR-132-3p/CREB5

We aimed at the effects of long non-coding RNA (lncRNA) SNHG5 on proliferation, metastasis and migration of colorectal cancer (CRC) cells. We also investigated regulatory relationships among miR-132-3p, SNHG5 and CREB5 and their roles in CRC. 25 pairs of samples containing CRC tissues and matched para-tumor tissues were obtained to examine SNHG5, miR-132-3p and CREB5 expression by qRT-PCR or Western blot. The targeted relationship between miR-132-3p and SNHG5 or CREB5 was confirmed by dual luciferase report assay as well as RNA pull down assay. The expression of SNHG5, miR-132-3p and CREB5 in CRC cells were regulated by cell transfection. CRC cellular proliferation was assayed by CCK-8 and meanwhile flow cytometry was adopted to observe apoptosis. Metastasis and migration of CRC cells were determined respectively by means of Transwell assay and scratch test. The effects of SNHG5 on CRC were researched in vivo, too. SNHG5 or CREB5 was up-regulated in CRC tissues and cells, whereas miR-132-3p was down-regulated. Overexpression of SNHG5 and CREB5 resulted in the enhancement of proliferation, metastasis, migration and the inhibition of apoptosis in CRC cells, while miR-132-3p led to the opposite result. LncRNA SNHG5 promoted proliferation, migration and metastasis of CRC cells but inhibited apoptosis by modulating miR-132-3p/CERB5.     

长链非编码RNA SNHG3在食管鳞状细胞癌中的表达及其对ECA-109细胞迁移和侵袭的影响

  目的  探究长链非编码RNA SNHG3在食管鳞状细胞癌（esophageal squamous cell carcinoma，ESCC）组织中的表达及其对ECA-109细胞迁移和侵袭的影响。  方法  收集安阳市肿瘤医院2011年6月到2014年6月收治的60例ESCC患者癌及对应癌旁组织样本，采用qRT-PCR检测ESCC癌与癌旁组织、ESCC细胞ECA-109和人正常食管上皮细胞HEEC中lncRNA SNHG3的表达水平，分析ESCC患者组织中lncRNA SNHG3的表达与ESCC患者临床特征的关系。采用siRNA-SNHG3质粒转染ECA-109细胞，以敲降lncRNA SNHG3的表达水平。采用Kaplan-Meier法分析lncRNA SNHG3表达与患者预后的关系。采用Transwell实验检测ECA-109细胞的迁移和侵袭能力。采用qRT-PCR和Western blot实验检测ECA-109细胞中SNAIL和TWIST的mRNA及蛋白的表达水平。  结果  ESCC肿瘤组织中lncRNA SNHG3的表达水平显著高于癌旁组织（P < 0.05），ECA-109细胞中lncRNA SNHG3的表达水平显著高于人正常食管上皮细胞HEEC（P < 0.05）。ESCC患者组织中lncRNA SNHG3的表达水平与肿瘤分化程度、TNM分期及淋巴结转移情况显著相关（P < 0.05）。siRNA-SNHG3质粒转染ECA-109细胞后，lncRNA SNHG3的表达水平显著降低（P < 0.05）。lncRNA SNHG3的高表达与ESCC患者预后不良显著相关。敲降lncRNA SNHG3后，ECA-109细胞的迁移和侵袭能力显著降低（P < 0.05），SNAIL和TWIST的mRNA及蛋白的表达水平显著降低（P < 0.05）。  结论  lncRNA SNHG3在ESCC肿瘤组织和细胞中高表达，通过调控SNAIL和TWIST蛋白的表达，促进ECA-109细胞的迁移和侵袭。      

Circ-RPPH1 knockdown retards breast cancer progression via miR-328-3p-mediated suppression of HMGA2

BackgroundCircular RNA Ribonuclease P RNA Component H1 (circ-RPPH1) was confirmed to act as an oncogene in many cancers to promote cancer progression. However, the exact function and mechanism of circ-RPPH1 in breast cancer (BC) remain vague.MethodsThe expression of circ-RPPH1, microRNA (miR)-328-3p and high-mobility group AT-hook 2 (HMGA2) was detected using quantitative real-time polymerase chain reaction and western blot. Cell viability, apoptosis, migration and invasion were determined using cell counting kit-8 assay, flow cytometry and transwell assay, respectively. Glucose metabolism was calculated by detecting glucose uptake and lactate production. The target correlations between miR-328-3p and circ-RPPH1 or HMGA2 were confirmed by dual-luciferase reporter assay. The murine xenograft model was established to conduct in vivo experiments.ResultsCirc-RPPH1 expression was elevated and miR-328-3p was decreased in BC tissues and cells. Circ-RPPH1 knockdown or miR-328-3p re-expression suppressed cell proliferation, migration, invasion and glycolysis but induced apoptosis in BC in vitro. Circ-RPPH1 was a sponge of miR-328-3p, and silencing of miR-328-3p reversed the inhibitory effects of circ-RPPH1 knockdown on BC cell malignant phenotypes and glycolysis. MiR-328-3p directly targeted HMGA2, and HMGA2 overexpression abolished the action of miR-328-3p in BC cells. Besides, circ-RPPH1 could regulate HMGA2 expression by miR-328-3p in BC cells. Moreover, murine xenograft model analysis suggested circ-RPPH1 knockdown inhibited tumor growth in vivo.ConclusionCirc-RPPH1 knockdown retarded cell malignant phenotypes and glycolysis via miR-328-3p/HMGA2 axis in BC, providing a potential therapeutic target for BC treatment.     

Long non‐coding RNA SNHG1 stimulates ovarian cancer progression by modulating expression of miR‐454 and ZEB1

Ovarian cancer (OC) is highly prevalent and is associated with high mortality rates due to metastasis and relapse. In this study, we assessed the role of long non‐coding RNA (lncRNA) small nucleolar RNA host gene 1 (SNHG1) in OC to gain further insight into mechanisms that contribute to its aggressiveness. We analyzed the correlation between SNHG1, miR‐454 and zinc finger E‐box‐binding homeobox 1 (ZEB1) using a dual‐luciferase reporter assay. Alterations in cell metastasis and invasiveness were observed using wound‐healing and Transwell invasion assays, respectively. Tumor xenografts allowed us to monitor liver metastasis of mice injected with A2780 cells. We found that SNHG1 is overexpressed in OC. Downregulation of SNHG1 promoted miR‐454 expression and reduced ZEB1 levels. In addition, knockdown of SNHG1, also reduced the aggressiveness of A2780 and SK‐OV3 cells. Furthermore, SNHG1 downregulation by siRNA hindered cell migration and invasion; however, this effect was reversed by co‐transfection of miR‐454 into A2780 and SK‐OV3 cells. Moreover, SNHG1 increased ZEB1 expression by downregulating miR‐454 and activated Akt signaling, thereby promoting epithelial‐mesenchymal transition and enhancing the invasiveness of OC cells. Tumor xenograft analyses confirmed that SNHG1 affects OC proliferation and metastasis in vivo. In summary, our data demonstrate that SNHG1 plays crucial roles in tumor progression and may be a useful maker for OC prognosis.     

LncRNA SNHG1靶向miR-101-3p调控胃癌细胞奥沙利铂耐药性

目的 探讨长链非编码RNA(lncRNA)核内小RNA宿主基因1(small nucleolar RNA host gene l,SNHG1)靶向微小RNA-101-3p(miR-101-3p)在胃癌细胞BGC-823中对奥沙利铂(OXA)耐药性的影响及其可能的机制.方法 体外培养BGC-823细胞和耐奥沙利铂细胞BG...     

lncRNA MAFG-AS1通过调控miR-11181-3p/GLG1轴促进胃癌AGS细胞迁移、侵袭和有氧糖酵解

目的：探讨lncRNA MAFG-AS1/miR-11181-3p/GLG1分子轴对胃癌（gastric cancer,GC）细胞迁移、侵袭和有氧糖酵解的影响及其可能的机制。方法：选取 MAFG-AS1 相对高表达的 GC 细胞系 AGS 作为研究对象,采用 qPCR 法检测其 MAFGAS1、miR-11181-3p、GLG1的RNA表达水平,Transwell实验、糖酵解分析等检测细胞迁移、侵袭和有氧糖酵解的变化,利用生物信息学分析及双荧光素酶报告基因验证MAFG-AS1、miR-11181-3p、GLG1之间的相互作用关系。结果：敲减MAFG-AS1显著上调miR-11181-3p及下调GLG1的表达（均P<0.01）,并可显著抑制GC细胞迁移、侵袭和有氧糖酵解（均P<0.01）;荧光素酶报告基因证实MAFG-AS1竞争性吸附miR-11181-3p（P<0.01）;抑制miR-11181-3p或过表达GLG1可部分逆转敲减MAFG-AS1对GC细胞迁移、侵袭和有氧糖酵解的抑制作用（均P<0.05或P<0.01）。结论：MAFG-AS1通过miR-11181-3p/GLG1分子轴增强GC迁移、侵袭和有氧糖酵解,可能是GC诊疗的潜在分子靶点。     

Long non-coding RNA small nucleolar RNA host gene 7 facilitates the proliferation,migration, and invasion of esophageal cancer cells by regulating microRNA-625

BackgroundEsophageal cancer (EC) is a highly aggressive malignant tumor, of which esophageal squamous cell carcinoma (ESCC) constitutes the main subtype. Long non-coding RNA (lncRNA) small nucleolar RNA host gene 7 (SNHG7) has been extensively studied in many tumors and has been confirmed to be an oncogene; however, it has yet to be investigated in an ESCC study. Therefore, this study intended to uncover the role of SNHG7 in ESCC.MethodsQuantitative real-time polymerase chain reaction was applied to measure the expression levels of SNHG7 and miR-625 in ESCC tumor tissues and cell lines. Cell Counting Kit-8 assay, 5-Ethynyl-2''-deoxyuridine assay, scratch assay, and Transwell assay were conducted to assess the proliferation, migration, and invasion ESCC cell. We verified the interaction between SNHG7 and miR-625 by performing the dual luciferase reporter gene experiment.ResultsCompared to that in adjacent normal tissues and HET1A cell lines, the expression level of SNHG7 in ESCC tumor tissues and ESCC cell lines was up-regulated, while the expression level of miR-625 was down-regulated. ESCC cell proliferation, migration, and invasion were significantly promoted by SNHG7 overexpression but inhibited by silencing of SNHG7. Further, luciferase reporter gene experiments confirmed that SNHG7 interacted with miR-625, and rescue experiments showed that SNHG7 promoted the malignant phenotype by inhibiting miR-625.ConclusionsSNHG7 is up-regulated in ESCC tumor tissues and cell lines, while miR-625 is expressed at a low level. SNHG7 is able to facilitate the proliferation, migration, and invasion of ESCC cells by targeting miR-625.     

LncRNA NR2F2-AS1 induces epithelial-mesenchymal transition of non-small cell lung cancer by modulating BVR/ATF-2 pathway via regulating miR-545-5p/c-Met axis

Non-small cell lung cancer (NSCLC) is one type of the most common cancers, which results in the major death worldwide. This study focuses on the understanding of the molecular mechanism of lncRNA NR2F2-AS1 and its regulation on epithelial-mesenchymal transition (EMT) in the development of NSCLC. Expressions of lncRNA NR2F2-AS1, miR-545-5p, c-Met, biliverdin reductase (BVR), ATF-2 and EMT-related markers in NSCLC tissues and cells were measured by western blotting and RT-qPCR assays. The impact of lncRNA NR2F2-AS1 and miR-545-5p on the cell proliferation, migration, invasion and EMT were analyzed by CCK-8, colony formation, wound healing and transwell assays. The interactions among lncRNA NR2F2-AS1, miR-545-5p and c-Met predicted by bioinformatic analysis were evaluated through dual luciferase reporter assay and fluorescence in situ hybridization (FISH). After generating tumor xenografts, immunohistochemistry was utilized to measure the expression of Ki-67 and EMT-related proteins in vivo. Our results showed that lncRNA NR2F2-AS1, c-Met, BVR and ATF-2 were overexpressed while miR-545-5p was silenced in NSCLC tissues and cells. Silencing of lncRNA NR2F2-AS1 or upregulating miR-545-5p significantly inhibited the cell proliferation, migration, invasion and EMT process. The EMT process could be inhibited by suppressing c-Met/BVR/ATF-2 axis. The tumor xenograft experiments demonstrated that the tumor growth and EMT process were significantly inhibited by silencing lncRNA NR2F2-AS1 or overexpression of miR-545-5p in vivo. LncRNA NR2F2-AS1 promoted the NSCLC development through suppressing miR-545-5p to activate EMT process through c-Met/BVR/ATF-2 axis. Our study indicated that lncRNA NR2F2-AS1 and miR-545-5p could be used as potential therapeutic targets to improve NSCLC treatment.     

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...     

lncRNA SBF2-AS1 通过调控miR-140-5p/VEGFA 分子轴促进宫颈癌HeLa细胞上皮间质转化

目的：探讨lncRNA SBF2-AS1 通过调控miR-140-5p/血管内皮生长因子A（VEGFA）分子轴对宫颈癌HeLa 细胞上皮间质转化（EMT）的影响。方法：细胞培养和转染后分为NC、miR-140-5p mimic、miR-140-5p mimic+pcDNA-VEGFA、si-lncRNASBF2-AS1+pcDNA-VEGFA及si-lncRNA SBF2-AS1+miR-140-5p mimic组5 组。采用qPCR检测lncRNA SBF2-AS1 在宫颈癌组织及细胞系中的表达水平,双荧光素酶报告基因验让lncRNA SBF2-AS1、miR-140-5p 与VEGFA的靶向关系,WB检测HeLa细胞中VEGFA及EMT标志物N-cadherin、Vimentin 和E-cadherin 的表达水平,Transwell 实验检测HeLa细胞侵袭和迁移能力。结果：lncRNASBF2-AS1 在宫颈癌组织及细胞系中高表达（P<0.05 或P<0.01）,lncRNA SBF2-AS1 靶向结合miR-140-5p,且VEGFA 是miR-140-5p 的靶基因（P<0.05）。敲降lncRNA SBF2-AS1 抑制HeLa细胞侵袭、迁移及EMT。进一步实验证实,lncRNA SBF2-AS1通过miR-140-5p 上调VEGFA的表达水平,从而促进HeLa 细胞侵袭、迁移及EMT（P<0.05 或P<0.01）。结论：lncRNA SBF2-AS1通过miR-140-5p/VEGFA分子轴促进HeLa细胞EMT。     

lncRNAXIST/miR-34a-5p/SIRT6 分子轴调控口腔鳞癌细胞的增殖及转移

[摘要] 目的：探究lncRNA XIST/miR-34a-5p/SIRT6 分子轴调控口腔鳞癌细胞增殖和转移及其分子机制。方法：收集2013年3 月至2018 年3 月在青岛市口腔医院就诊的OSCC患者47 例癌组织和癌旁组织标本,采用qPCR检测OSCC患者组织及细胞系中lncRNA XIST、miR-34a-5p、SIRT6 mRNA 的表达,WB检测OSCC 患者组织及细胞系中SIRT6、Ki67、pcDNA、cleaved-caspase3、cleaved-caspase8、E-cadherin、Vimentin 蛋白的表达,采用CCK-8 实验检测敲降lncRNA XIST对Cal-27 及Tca-8113 细胞增殖的影响,Transwell 小室法检测Cal-27 及Tca-8113 细胞迁移及侵袭;流式细胞术检测Cal-27 及Tca-8113 细胞凋亡情况,双荧光素酶报告基因检测lncRNA XIST与miR-34a-5p、miR-34a-5p 与SIRT6 靶向结合关系。结果：lncRNA XIST和SIRT6 在OSCC患者癌组织及细胞系中高表达（均P<0.05）,miR-34a-5p 则呈低表达（P<0.01）;敲降lncRNA XIST抑制OSCC细胞的增殖、迁移及侵袭并促进细胞凋亡（均P<0.01）,同时转染miR-34a-5p 抑制剂或pcDNA-SIRT6 载体作用则相反;敲降lncRNA XIST 促进OSCC细胞中增殖及转移相关蛋白表达（均P<0.01）,同时转染miR-34a-5p 抑制剂或pcDNA-SIRT6 载体作用则相反;lncRNA XIST 与miR-34a 靶向结合,miR-34a 与SIRT6 靶向结合;lncRNA XIST 通过靶向miR-34a-5p 上调SIRT6 表达（P<0.01）。结论：lncRNA XIST/miR-34a-5p/SIRT6 分子轴能够调控OSCC细胞增殖及转移,为OSCC治疗提供潜在靶点。     

SNHG11调控miR-154影响结直肠癌细胞增殖、凋亡、迁移和侵袭的机制研究

目的 探讨长链非编码RNA SNHG11对结直肠癌细胞增殖、凋亡、迁移和侵袭的影响及作用机制.方法 选取2014年2月至2017年10月于焦作市人民医院行手术治疗的50例结直肠癌患者的癌组织及对应癌旁组织,实时荧光定量PCR检测组织中SNHG11和miR-154的表达水平.转染SNHG11的小干扰RNA(si-SNHG...