Long non-coding RNA LINC01116 accelerates the progression of keloid formation by regulating miR-203/SMAD5 axis

BackgroundEmerging evidence reveals the importance of long non-coding RNAs (lncRNAs) in the development and progression of keloid formation. However, the roles and molecular mechanism of lncRNA LINC01116 in the progression of keloid formation remain largely unknown.MethodsThe expression levels of LINC01116, microRNA-203 (miR-203) and SMAD family member 5 (SMAD5) were measured by quantitative real-time polymerase chain reaction (qRT-PCR) and western blot. Cell proliferation, migration and invasion were detected by Cell counting Kit-8 (CCK-8) assay and transwell assay. Flow cytometry and western blot assay were used to examine cell apoptosis and extracellular matrix (ECM) production. The interaction between miR-203 and LINC01116 or SMAD5 was predicted by bioinformatics analysis and verified by dual-luciferase reporter and RNA Immunoprecipitation (RIP) and RNA pull-down assays.ResultsLINC01116 and SMAD5 were upregulated while miR-203 was downregulated in keloid tissues and keloid fibroblasts. LINC01116 knockdown suppressed the proliferation, migration, invasion, and ECM production but induced apoptosis in keloid fibroblasts through enhancing miR-203 and inhibiting SMAD5. Moreover, SMAD5 was identified as a direct target of miR-203 and miR-203 could directly bind to LINC01116. Besides, LINC01116 regulated SMAD5 expression by targeting miR-203.ConclusionDownregulation of LINC01116 inhibited the progression of keloid formation by regulating miR-203/SMAD5 axis, which might provide a novel target for keloid therapy.     

lncRNA FOXP4-AS1通过miR-507调控甲状腺乳头状癌细胞生物学行为的作用机制研究

背景与目的 长链非编码RNA（lncRNA）可通过结合mircoRNA（miRNA）来间接调控下游mRNA的转录及降解,从而调控肿瘤发生与发展。lncRNA FOXP4-AS1是近年来发现的一种新的肿瘤相关生物标志物,在不同的肿瘤中发挥着不同的调控作用,笔者前期研究发现,FOXP4-AS1在甲状腺乳头状癌（PTC）中呈低表达,发挥抑癌作用。此外,笔者通过数据库预测miR-507可与FOXP4-AS1互补结合。因此,本研究探讨FOXP4-AS1通过调控miR-507及其下游靶mRNA抑制PTC细胞的生长的作用与机制。方法 通过TCGA数据库分析miR-507在甲状腺癌（TC）中的表达水平及其在TC中的临床意义。qRT-PCR检测PTC细胞系（TPC-1、K1）和正常甲状腺滤泡上皮细胞（Nthy-ori3-1）中miR-507的表达水平,以及过表达及敲低FOXP4-AS1后检测miR-507表达水平的变化。用双荧光素酶报告基因实验验证FOXP4-AS1与miR-507靶向关系。分别在FOXP4-AS1过表达及敲低稳转株上转染miR-507的模拟物、抑制物,并分别用CCK-8实验、克隆形成实验、Transwell实验、划痕愈合实验以及流式细胞术检测细胞功能的变化。用生物信息学方法分析miR-507下游靶点并用qRT-PCR验证。结果 TCGA数据库分析结果显示,miR-507在TC中高表达,且其表达水平TC患者与临床病理分期、T分期、腺外浸润等临床病理特征有关（均P<0.05）。qRT-PCR结果显示,与Nthy-ori3-1细胞比较,miR-507在两种PTC细胞中呈高表达,且过表达和敲低FOXP4-AS1后,两种PTC细胞中miR-507的表达水平随之反向改变（均P<0.05）。双荧光素酶报告基因实验结果显示,FOXP4-AS1与miR-507靶向结合,并抑制miR-507的表达。细胞功能实验及功能回复实验显示,FOXP4-AS1过表达后,PTC细胞的增殖活力、迁移能力和抗凋亡能力明显减弱,同时加入miR-507的模拟物后,PTC细胞以上功能回复（均P<0.05）;敲低FOXP4-AS1后,PTC细胞的增殖活力、迁移能力和抗凋亡能力明显升高,同时加入miR-507的抑制物后,PTC细胞以上功能回复（均P<0.05）。数据库预测与GO、KEGG富集分析结果显示,miR-507下游可能涉及CAMK4,qRT-PCR验证结果显示,CAMK4的表达水平随FOXP4-AS1表达水平的上调、下调呈同向改变,且其表达水平随miR-507模拟物和抑制物的加入而反向改变（均P<0.05）。结论 FOXP4-AS1可以靶向结合miR-507,并可能通过海绵作用抑制miR-507表达水平调控PTC细胞的增殖、迁移及细胞凋亡。CAMK4可能是FOXP4-AS1/miR-507通路发挥抑癌作用的下游靶点之一。     

lncRNA XIST is associated with preeclampsia and mediates trophoblast cell invasion via miR-340-5p/KCNJ16 signaling pathway

BackgroundPreeclampsia (PE) is a syndrome commonly occurring among the pregnant. Shallow trophoblast invasion is considered to be closely related to PE. Therefore, in trophoblast cells, we explored the potential mechanisms of lncRNA XIST in the modulation of trophoblast invasion and proliferation.MethodsGEO online analyzer was used to screen the abnormally expressed RNAs in placenta tissues from patients with severe PE and healthy controls. The prediction of target bindings was performed on TargetScan and starBase. Transfection was conducted to regulate the RNA expression levels in trophoblast cells, HTR-8/SVneo. RT-qPCR measured expression of lncRNA XIST, miR-340-5p and KCNJ16. The CCK-8 assay examined cell viability. Flow cytometer analyzed apoptosis and luciferase assay determined the luciferase activity. Transwell assays detected the invasion and western blot verified the changes in protein expression of MMP2, MMP9 and KCNJ16 in trophoblast cells.ResultslncRNA XIST expression was enhanced in PE patients. Upregulation of lncRNA XIST in HTR-8/SVneo cells inhibited the cell proliferation and invasion, and induced apoptosis. XIST upregulation inhibited MMP2 and MMP9 protein expression. lncRNA XIST/ KCNJ16 interplayed as ceRNAs of miR-340-5p. Specifically,miR-340-5p overexpression reversed the effect of XIST upregulation on the cell apoptosis, proliferation and invasive ability and the knockdown of KCNJ16 could add to the effect of miR-340-5p overexpression in HTR-8/SVneo.ConclusionlncRNA XIST was upregulated in PE. Upregulation of lncRNA XIST exerted the inhibitory effects on the proliferation and invasion of trophoblast cells through the interactions with miR-340-5p/KCNJ16, which suggests that the lncRNA XIST/miR-340-5p/KCNJ16 axis might play a role in PE.     

Circ_0008450 regulates keloid-derived fibroblast proliferation,migration, invasion and apoptosis with increased IGFBP5 through sponging miR-1224-5p

BackgroundKeloids (KD) are benign fibroproliferative tumors and circular RNAs (circRNAs) may participate in KD progression. At present, whether circ_0008450 regulates keloid-derived fibroblast phenotypes remains unclear. This study aimed to explore the functions of circ_0008450 in keloid (KD)-derived fibroblast phenotypes and the underlying mechanism.MethodsQuantitative real-time polymerase chain reaction (qRT-PCR) or western blot assay was performed to determine the expression of circ_0008450, miR-1224-5p, insulin like growth factor binding protein 5 (IGFBP5) and extracellular matrix (ECM)-related markers. 5-Ethynyl-2′-deoxyuridine (EdU) assay was conducted to assess cell proliferation ability. Flow cytometry analysis was used to analyze cell cycle and cell apoptosis. Scratch assay and transwell assay were utilized to examine cell migration and invasion. Mechanism assays were executed to verify the relations of circ_0008450, miR-1224-5p and IGFBP5.ResultsCirc_0008450 was highly expressed in KD tissues and KD-derived fibroblasts. Circ_0008450 silencing inhibited KD-derived fibroblast proliferation, cell cycle, and motility and promoted apoptosis. The effect of circ_0008450 knockdown on KD-derived fibroblast processes was ameliorated by miR-1224-5p downregulation. IGFBP5 was a target gene of miR-1224-5p. IGFBP5 upregulation abated miR-1224-5p-mediated effects on KD-derived fibroblast processes.ConclusionCirc_0008450 promoted KD-derived fibroblast proliferation, migration, and invasion and repressed apoptosis via sponging miR-1224-5p and elevating IGFBP5.     

Long non-coding RNA H19 promotes the proliferation,migration and invasion while inhibits apoptosis of hypertrophic scarring fibroblasts by targeting miR-3187-3p/GAB1 axis

BackgroundIt had been reported that long non-coding RNA (lncRNA) H19 was associated with the proliferation of fibroblasts. However, the regulatory mechanism of H19 remains unclear. Thus, the study was designed to explore the underlying mechanism of H19 in the process of Hypertrophic scarring (HS).MethodsThe expression levels of H19, miR-3187-3p, and growth factor receptor binding 2-associated binding protein 1 (GAB1) in HS tissues and HS fibroblasts were measured by real-time quantitative polymerase chain reaction (RT-qPCR) assay. The biological behaviors of HS fibroblasts, such as cell proliferation, apoptosis, migration, and invasion were assessed by 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl-2H-tetrazol-3-ium bromide (MTT), colony formation, flow cytometry, and transwell assays, respectively. The protein expression level was quantified by western blot assay. The interaction association between miR-3187-3p and H19 or GAB1 was predicted by Starbase database analysis and confirmed by dual-luciferase reporter assay, respectively.ResultsH19 was significantly increased in HS tissues and HS fibroblasts. Loss-of-functional experiments revealed that knockdown of H19 inhibited the development of HS. Moreover, silencing of H19 impeded the proliferation, migration, and invasion, while enhanced apoptosis of HS fibroblasts by increasing miR-3187-3p expression. In addition, overexpression of GAB1 could abolish miR-3187-3p overexpression-induced effects on cell proliferation, apoptosis, migration, and invasion of HS fibroblasts. Mechanistically, H19 could act as a sponge of miR-3187-3p to upregulate the expression of GAB1 in HS fibroblasts.ConclusionCollectively, our results revealed that H19 promoted the proliferation, migration, and invasion, while impeded apoptosis of HS fibroblasts by targeting miR-3187-3p/GAB1 axis.     

CircCOL5A1 inhibits proliferation,migration, invasion,and extracellular matrix production of keloid fibroblasts by regulating the miR-877-5p/EGR1 axis

BackgroundCircular RNA (circRNA) has been proved to mediate the biological functions of fibroblasts to participate in the regulation of keloid formation. However, the role of circCOL5A1 in keloid formation remains to be further confirmed.MethodsPrimary keloid fibroblasts were isolated form keloid tissues. The expression of circCOL5A1, microRNA (miR)? 877–5p, and early growth response 1 (EGR1) were determined by quantitative real-time PCR. Transfection experiments were carried out to explore the effects of circCOL5A1, miR-877–5p, and EGR1 on cell functions. Cell proliferation, migration, invasion and apoptosis were detected using cell counting kit 8 assay, colony formation assay, transwell assay and flow cytometry. The protein levels of apoptosis markers, extracellular matrix (ECM) markers and EGR1 were measured by western blot analysis. The mechanism of circCOL5A1 was confirmed by RNA pull-down assay, dual-luciferase reporter assay and RIP assay.ResultsOur data showed that circCOL5A1 was upregulated in keloid tissues and fibroblasts. Silencing of circCOL5A1 had an inhibition effect on proliferation, migration, invasion and ECM production, while had a promotion effect on apoptosis in keloid fibroblasts. MiR-877–5p could be sponged by circCOL5A1, and its overexpression could repress the biological functions of keloid fibroblasts. The rescue experiments showed that miR-877–5p inhibitor could reverse the suppressive effect of circCOL5A1 knockdown on the biological functions of keloid fibroblasts. In addition, EGR1 was a target of miR-877–5p, and its expression was positively regulated by circCOL5A1. The inhibition effect of miR-877–5p on the biological functions of keloid fibroblasts could be abolished by EGR1 overexpression.ConclusionIn summary, circCOL5A1 facilitates keloid fibroblast proliferation, migration, invasion and ECM production through the miR-877–5p/EGR1 axis, thereby potentially promoting keloid formation.     

LncRNA ZBED3-AS1/miR-339-5p/Notch 1轴调控骨质疏松大鼠成骨细胞增殖分化

目的探究LncRNA ZBED3-AS1调控miR-339-5p/Notch 1在骨质疏松大鼠成骨细胞增殖分化中的作用。方法构建假手术(Sham)组和模型(Model)组大鼠模型,对大鼠的骨密度进行检查观测大鼠建模情况。分离大鼠成骨细胞,qRT-PCR检测细胞中ZBED3-AS1、miR-339-5p的表达。对Sham组和Model组大鼠成骨细胞进行分组后转染。CCK8、茜素红(AR-S)染色、碱性磷酸酶(ALP)染色检测各组细胞增殖分化能力。FISH实验测定ZBED3-AS1在细胞中的分布。双荧光素酶报告证实ZBED3-AS1与miR-339-5p及miR-339-5p和Notch 1之间的关系。Western blot检测Notch通路相关因子的表达。结果检测股骨骨密度发现,Model组大鼠骨密度明显低于Sham组大鼠(P=0.0 057)。与Sham组大鼠比较,Model组大鼠成骨细胞中ZBED3-AS1呈低表达,而miR-339-5p呈高表达(均P<0.05)。过表达ZBED3-AS1能促进成骨细胞的增殖分化;而敲减ZBED3-AS1则能抑制成骨细胞增殖分化(均P<0.05)。ZBED3-AS1作为ceRNA调控miR-339-5p(均P<0.05)。过表达miR-339-5p能抑制成骨细胞的增殖分化能力,而该作用可被ZBED3-AS1过表达部分挽救。Notch 1被证实为miR-339-5p的作用靶点,且干预ZBED3-AS1/miR-339-5p的表达能影响Notch 1的蛋白表达,ZBED3-AS1/miR-339-5p对成骨细胞的调控可能是通过Notch通路实现的。结论 ZBED3-AS1能作为ceRNA调控miR-339-5p,进而影响骨质疏松大鼠成骨细胞增殖分化。     

长链非编码RNA RUSC1-AS1对肝细胞癌恶性生物学行的影响及其与微小RNA-326的关系

背景与目的:有研究表明长链非编码RNARUSC1-AS1(lnc RNARUSC1-AS1)与肿瘤的恶性生物学行为密切相关,但其对肝细胞癌(肝癌)的影响尚不清楚。笔者前期研究显示,lnc RNARUSC1-AS1与微小RNA-326(mi R-326)存在结合位点,因此本研究探讨lnc RNARUSC1-AS1在肝癌中的表达,以及是否通过靶向mi R-326调控肝癌细胞生物学行为。方法:用q RT-PCR检测41例肝癌组织和对应癌旁组织中lnc RNARUSC1-AS1与mi R-326的表达。以lnc RNARUSC1-AS1表达抑制质粒/阴性对照质粒、mi R-326模拟物/阴性对照序列、mi R-326抑制物/阴性对照序列为工具,采用MTT法、Transwell法、流式细胞术、Westernblot法观察接受不同转染处理的MHCC97-H细胞的增殖能力、迁移和侵袭能力、凋亡以及相关蛋白表达的变化。采用荧光素酶报告实验分析lnc RNARUSC1-AS1和mi R-326的靶向关系,并用q RT-PCR验证。结果:与癌旁组织比较,肝癌组织中lnc RNARUSC1-AS1表达水平明显升高,mi R-326表达水平明显降低(均P0.05)。转染lnc RNARUSC1-AS1表达抑制质粒或mi R-326模拟物后,肝癌MHCC97-H细胞的增殖能力以及迁移与侵袭能力明显降低,细胞凋亡率明显升高,cyclinD1、MMP-2、MMP-9、Bcl-2蛋白表达水平明显降低,P21、Bax蛋白表达水平明显升高(均P0.05)。MHCC97-H细胞转染lnc RNARUSC1-AS1表达抑制质粒的同时mi R-326抑制物,前者对MHCC97-H细胞以上作用被取消(均P0.05)。双荧光素酶报告实验及q RT-PCR验证结果显示,mi R-326为lnc RNARUSC1-AS1的靶分子。结论:lnc RNARUSC1-AS1在肝癌中表达上调,其可通过靶向调控mi R-326的表达促进肝癌细胞的恶性生物学行。     

长链非编码RNA肿瘤蛋白翻译控制反义RNA 1对结肠癌细胞增殖和侵袭能力的影响

目的探讨长链非编码RNA(lncRNA)肿瘤蛋白翻译控制反义RNA 1(TPT1-AS1)在结肠癌组织中的表达和临床意义,及其对结肠癌细胞增殖、细胞周期、迁移和侵袭的影响。方法收集2016年7月至2017年9月于天津医科大学总医院胃肠外科进行结肠癌根治术的72例结肠癌患者的癌组织标本及相应的癌旁组织,采用实时定量反转录聚合酶链反应(RT-qPCR)检测lncRNA TPT1-AS1在结肠癌组织的相对表达量,并分析其表达与结肠癌临床病理特征的相关性。构建lncRNA TPT1-AS1敲低和对照载体(si-TPT1-AS1、si-NC),分别设为敲低组和对照组,采用细胞计数试剂盒(CCK-8)细胞增殖实验、细胞周期分析实验、Transwell迁移侵袭实验检测结肠癌细胞SW620的增殖、细胞周期阻滞、迁移和侵袭能力。计量资料组间比较采用t检验,计数资料采用χ²检验。结果LncRNATPT1-AS1在结肠癌组织中的相对表达量显著高于对应的癌旁组织(3.99±0.21比1.78±0.09,t=35.433,P<0.05),且其表达与TNM分期(χ²=9.000,P<0.05)和远处转移(χ²=4.600,P<0.05)呈正相关,差异均有统计学意义。CCK-8实验结果显示,敲低TPT1-AS148 h(0.47±0.02比0.83±0.05,t=10.543,P<0.05)、72 h后(0.69±0.02比1.23±0.09,t=10.145,P<0.05),SW620细胞的增殖能力均显著低于对照组,差异均有统计学意义。细胞周期分析显示,敲低TPT1-AS1可使G0/G1期细胞比例高于对照组[(68.47±2.79)%比(44.69±1.26)%,t=14.672,P<0.05],S期细胞比例低于对照组[(22.87±1.96)%比(37.48±1.57)%,t=17.246,P<0.05],G2/M期细胞比例低于对照组[(8.22±0.87)%比(20.78±0.45)%,t=18.772,P<0.05],差异均有统计学意义。Transwell迁移侵袭实验结果表明,敲低TPT1-AS1可使SW620细胞的迁移能力显著低于对照组[[(87±8)个比(177±10)个,t=15.237,P<0.05],侵袭能力显著低于对照组[(47±5)个比(122±8)个,t=19.578,P<0.05],差异均有统计学意义。结论lncRNA TPT1-AS1在结肠癌组织中表达升高,敲低TPT1-AS1可抑制结肠癌细胞增殖、细胞周期G1/S期转换、迁移和侵袭。     

Role and mechanism of Circ-PDE7B in the formation of keloid

The excessive proliferation of keloid fibroblasts is one of the important reasons leading to the formation of keloids. Circular RNA (circRNA) is an important regulator that regulates the biological functions of cells. However, the role and mechanism of circ-PDE7B in keloid formation have not been studied yet. QRT-PCR was used to detect the circ-PDE7B, miR-331-3p and cyclin-dependent kinase 6 (CDK6) expression. The biological functions of keloid fibroblasts were determined by MTT assay, flow cytometry, transwell assay and wound healing assay. Western blot analysis was used to measure the protein levels of extracellular matrix (ECM) markers and CDK6. The interaction between miR-331-3p and circ-PDE7B or CDK6 was confirmed by dual-luciferase reporter assay and RIP assay. Circ-PDE7B was found to be upregulated in keloid tissues and fibroblasts. Downregulation of circ-PDE7B could suppress the proliferation, invasion, migration, ECM accumulation and accelerate the apoptosis of keloid fibroblasts. Circ-PDE7B could serve as a sponge of miR-331-3p, and the regulation of silenced circ-PDE7B on the biological functions of keloid fibroblasts could be abolished by miR-331-3p inhibitor. Additionally, CDK6 was a target of miR-331-3p, and its overexpression could reverse the negative regulation of miR-331-3p on the biological functions of keloid fibroblasts. Circ-PDE7B sponged miR-331-3p to positively regulate CDK6 expression. Taken together, circ-PDE7B promoted the proliferation, invasion, migration and ECM accumulation of keloid fibroblasts by regulating the miR-331-3p/CDK6 axis, suggesting that circ-PDE7B might be a potential target for keloid treatment.     

长链非编码 RNA SOX21-AS1调控 miR-31-5p/MMP-16轴对胰腺癌细胞活性与增殖的影响

背景与目的:胰腺癌是一种常见的消化系统恶性肿瘤,也是癌症死亡的常见病因.长链非编码RNA(lncRNA)已在多种恶性肿瘤中被鉴定为调节因子和特异度生物标志物.最新研究表明,lncRNA SOX21-AS1在多种恶性肿瘤的发生、发展中起重要作用.但其在胰腺癌中的作用尚未明确.因此,本研究探讨SOX21-AS1在胰腺癌中的...     

长链非编码RNA GAS8-AS1与微小RNA 135b在肝细胞癌中的表达及临床意义

背景和目的：大量研究表明,长链非编码RNA (lncRNA)与微小RNA (miRNA)及其靶基因之间内源性竞争的调控模式与恶性肿瘤的发生发展密切相关。笔者团队前期通过软件预测发现,lncRNA GAS8-AS1和miR-135b之间存在结合位点,但两者在肝细胞癌（HCC）中是否存在竞争关系及其作用尚不清楚。因此,本研究探讨lncRNA GAS8-AS1和miR-135b在HCC组织中的表达及其临床意义。方法：收集2017年2月—2019年2月在青海大学附属医院行手术切除的110例HCC患者的癌组织及癌旁组织标本,通过qRT-PCR检测lncRNA GAS8-AS1和miR-135b的表达,分析两者与患者临床病理特征及预后的关系。结果：lncRNA GAS8-AS1在HCC组织中的表达明显低于癌旁组织,而miR-135b在HCC组织中的表达明显高于癌旁组织（均P<0.05）。两者的表达水平均与HCC患者的Edmondson分期、TNM分期、分化程度及淋巴结转移情况有关（均P<0.05）。lncRNA GAS8-AS1低表达患者与miR-135b高表达患者的3年总生存率分别明...     

CircSLC8A1 targets miR-181a-5p/HIF1AN pathway to inhibit the growth,migration and extracellular matrix deposition of human keloid fibroblasts

BackgroundCircular RNAs (circRNAs) are identified as important regulators in human diseases, including keloid. The purpose of this study is to reveal the role and molecular mechanism of circSLC8A1 in keloid formation.MethodsExpression of circSLC8A1, microRNA (miR)-181a-5p, and hypoxia inducible factor 1 alpha inhibitor (HIF1AN) were detected by quantitative real-time PCR. Protein expression of extracellular matrix (ECM) deposition markers and HIF1AN was detected by western blot analysis. Furthermore, the interaction between miR-181a-5p and circSLC8A1 or HIF1AN was confirmed by dual-luciferase reporter assay, RIP assay and RNA pull-down assay.ResultsExpression of circSLC8A1 was downregulated in keloid tissues and HKFs. Overexpression of circSLC8A1 suppressed HKFs proliferation, migration, ECM deposition, and promoted apoptosis. MiR-181a-5p is targeted by circSLC8A1, and its mimic reversed the effect of circSLC8A1 on the biological function of HKFs. HIF1AN was a target of miR-181a-5p, and it was positively regulated by circSLC8A1. Knockdown of HIF1AN also reversed the negatively regulation of circSLC8A1 on the biological functions of HKFs.ConclusionOur data showed that circSLC8A1 regulates the miR-181a-5p/HIF1AN axis to restrain HKFs biological functions, confirming that circSLC8A1 might serve as a novel therapeutic target for keloids.     

Circ_0000069 contributes to the growth,metastasis and glutamine metabolism in renal cell carcinoma (RCC) via regulating miR-125a-5p-dependent SLC1A5 expression

BackgroundCircular RNAs (circRNAs) have emerged as critical mediators in various cancers, including renal cell carcinoma (RCC). In the present research, the functions of circ_0000069 in RCC were explored.MethodsQuantitative real-time polymerase chain reaction (qRT-PCR) assay, western blot assay and immunohistochemistry (IHC) assay were performed for the expression of circ_0000069, microRNA-125a-5p (miR-125a-5p) and solute carrier family 1 member 5 (SLC1A5). Cell Counting Kit-8 (CCK-8) assay and 5′-ethynyl-2′-deoxyuridine (EdU) assay were performed for cell proliferation. Flow cytometry assay was manipulated for cell apoptosis. Transwell assay and wound-healing assay were utilized for cell invasion and migration. Glutamine metabolism level was evaluated by examining glutamine consumption, α-ketoglutarate production and glutamate production. Dual-luciferase reporter assay was used to analyze the relationships of circ_0000069, miR-125a-5p and SLC1A5. Murine xenograft model assay was conducted to analyze the function of circ_0000069 in vivo.ResultsCirc_0000069 level was abnormally upregulated in RCC tissues and cells. Knockdown of circ_0000069 inhibited the proliferation, invasion, migration and glutamine metabolism and promoted the apoptosis in RCC cells in vitro and restrained tumor growth in vivo. Circ_0000069 served as the sponge for miR-125a-5p. MiR-125a-5p inhibition ameliorated the effects of circ_0000069 knockdown on RCC cell malignant behaviors. SLC1A5 was identified as the target gene of miR-125a-5p. Moreover, miR-125a-5p overexpression repressed the progression of RCC cells, while SLC1A5 elevation abrogated the effect.ConclusionCirc_0000069 knockdown inhibited the carcinogenesis of RCC by regulating miR-125a-5p/SLC1A5 axis.     

长链非编码RNA氧化应激反应丝氨酸丰富1反义RNA 1对肾癌细胞增殖、迁移及侵袭的影响

目的探讨长链非编码RNA氧化应激反应丝氨酸丰富1反义RNA 1(lncRNA OSER1-AS1)对肾癌ACHN细胞的增殖、迁移、侵袭的影响及其对微小RNA(microRNA,miR)-612的调控作用。方法2017年1月至2020年3月,采用实时定量反转录聚合酶链反应(RT-qPCR)法检测肾癌组织、癌旁组织中OSER1-AS1、miR-612的表达量;体外培养肾癌细胞ACHN,分别将OSER1-AS1小分子干扰RNA(si-OSER1-AS1)及其阴性对照(si-NC)、miR-612寡核苷酸模拟物(miR-612 mimics)及阴性对照mimic NC序列(miR-NC)、si-OSER1-AS1与miR-612特异性寡核苷酸抑制剂的阴性对照(anti-miR-NC)、si-OSER1-AS1与miR-612特异性寡核苷酸抑制剂(anti-miR-612)转染至ACHN细胞;采用RT-qPCR法检测细胞中OSER1-AS1、miR-612的表达量;采用噻唑蓝(MTT)、Transwell小室实验分别检测细胞增殖、迁移及侵袭能力;双荧光素酶报告实验检测OSER1-AS1、miR-612的靶向关系;蛋白质印迹法(Western blot)检测细胞周期蛋白1(Cyclin D1)、基质金属蛋白酶(MMP)-2、MMP-9、p21蛋白表达量。两组间比较采用独立样本t检验,多组间比较采用单因素方差分析。结果肾癌组织OSER1-AS1的表达水平(1.00±0.08比3.37±0.28)高于癌旁组织(t=52.113,P<0.05),miR-612的表达水平(1.00±0.06比0.47±0.04)低于癌旁组织(t=47.062,P<0.05);si-OSER1-AS1组细胞活力(0.66±0.05比0.31±0.03)与Cyclin D1(0.63±0.05比0.25±0.02)、MMP-2(0.82±0.07比0.35±0.03)、MMP-9(0.76±0.06比0.28±0.03)蛋白水平低于si-NC组(t=18.007、21.169、18.514、21.466,P<0.05),si-OSER1-AS1组迁移细胞数[(115.56±9.52)个比(55.99±5.59)个]、侵袭细胞数[(93.41±6.09)个比(46.05±4.35)个]低于si-NC组(t=16.188、18.984,P<0.05),si-OSER1-AS1组p21蛋白水平(0.15±0.02比0.57±0.05)高于si-NC组(t=23.398,P<0.05);miR-612组细胞活力(0.68±0.05比0.39±0.03)与Cyclin D1(0.66±0.05比0.28±0.03)、MMP-2(0.85±0.06比0.46±0.03)、MMP-9(0.78±0.05比0.34±0.02)蛋白水平低于miR-NC组(t=14.920、19.551、17.441、24.512,P<0.05),miR-612组迁移细胞数[(118.76±9.87)个比(64.39±4.65)个]、侵袭细胞数[(99.65±9.12)个比(53.57±3.67)个]低于miR-NC组(t=14.950、14.062,P<0.05),miR-612组p21蛋白水平(0.14±0.02比0.51±0.04)高于miR-NC组(t=24.820,P<0.05);双荧光素酶报告实验证实OSER1-AS1可靶向结合miR-612;抑制miR-612表达可明显逆转干扰OSER1-AS1对细胞增殖、迁移及侵袭的作用。结论干扰OSER1-AS1可通过上调miR-612的表达从而抑制肾癌ACHN细胞增殖、迁移及侵袭。     

miR-181a-5p通过HOXB4抑制骨肉瘤细胞HOS增殖和迁移

目的：研究miR-181a-5p对HOS骨肉瘤细胞增殖、周期和迁移的影响及其机制。方法 ：采用实时定量PCR检测hFOB1.19成骨细胞和HOS、U2OS、MG63骨肉瘤细胞系中miR-181a-5p及HOXB4的表达情况。利用Lipofectamine 2000将miR-181a-5p mimics和miR-181a-5p inhibitor分别转染至人骨肉瘤HOS细胞中（分别为过表达组和抑制剂组）,并设置miR阴性对照组;CCK-8法检测各组细胞的增殖能力变化,流式细胞术检测各组细胞的细胞周期变化,划痕愈合实验以及Transwell迁移实验检测各组细胞的迁移能力变化。Targetscan网站预测miR-181a-5p的靶向基因,并通过双荧光素酶报告基因系统及Western blot验证靶向关系。结果：与成骨细胞hFOB1.19相比,miR-181a-5p在骨肉瘤细胞HOS、U2OS和MG63中低表达（P<0.05）,而HOXB4在骨肉瘤中高表达（P<0.05）。与阴性对照组相比,过表达miR-181a-5p抑制骨肉瘤HOS细胞的增殖和迁移能力,并且处于细胞周期S期的细胞...     

LncRNA HCP5 promotes neuroblastoma proliferation by regulating miR-186-5p/MAP3K2 signal axis

IntroductionNeuroblastoma (NB) is the most common solid tumor in children. Studies showed that long-chain noncoding RNA (lncRNA) HCP5 played an important role in tumorigenesis, but its role in NB remained unclear. This study aims to determine the role of HCP5 in NB and its possible molecular mechanism.MethodsWe analyzed the expression levels of miRNA-186-5p and HCP5 in neuroblastoma and neuroblastoma cell lines SHSY-5Y, Kelly, NBL-S and SK-N-AS, and explored their roles.ResultsWe found that the HCP5 expression was up-regulated in NB tissues and cells. The higher the HCP5 expression in NB cells, the stronger the ability of clone formation. Down regulation of the HCP5 expression inhibited the proliferation of NB cells and the growth of subcutaneous transplanted tumor in nude mice. HCP5 could competitively bind miR-186-5p, while miR-186-5p could target the 3′-UTR of MAP3K2. The expression level of miR-186-5p was down regulated while the expression level of MAP3K2 was up-regulated in NB tissues. The expression level of HCP5 and miR-186-5p, the expression level of miR-186-5p and MAP3K2 were negatively correlated. The decreased proliferation of NB cells induced by down-regulation of HCP5 expression can be counteracted by miR-186-5p inhibitor or MAP3K2, and vice versa.ConclusionThis study showed that lncRNA HCP5, as ceRNA, regulated MAP3K2 to promote NB progression through competitive binding of miR-186-5p. We revealed a new signaling pathway that mediates NB, which provided a new target for the diagnosis and treatment of NB.     

microRNA-671-5p在肝细胞癌中的表达及其负向调控丝切蛋白2与上皮细胞-间质转化的关系

背景与目的:近年研究发现,microRNA-671-5p(miR-671-5p)参与了多种恶性肿瘤的发生发展,同时与多种病毒介导的肝损伤相关,但其与肝细胞癌(HCC)之间的关系目前仍未见报道。本研究的目的为观察miR-671-5p在HCC中的表达情况,分析其功能及其与HCC生物学行为及临床病理特征的联系,并初步探讨作用机制。方法:用qRT-PCR检测80例HCC组织及癌旁组织样本、不同HCC细胞系(Hep3B、MHCC-97H、HepG2、SMMC-7721)及人正常肝细胞(L02)中miR-671-5p的表达,且在同时分析TCGA数据库中miR-671-5p在HCC组织与癌旁组织的表达差异。分析miR-671-5p表达量与临床病理因素的关系;用miR-671-5p抑制物敲低MHCC-97H细胞系中miR-671-5p的表后,分别采用CCK-8实验及Transwell实验分别检测HCC细胞转染miR-671-5p抑制物后增殖、侵袭及迁移能力的变化。利用TargetScan及Starbase网站预测miR-671-5p的靶基因,并通过Western blot、双荧光素酶实验及TCGA数据库分析验证。用Western blot观察降低miR-671-5p表达对HCC细胞中miR-671-5p靶基因及上皮细胞-间质转化(EMT)相关蛋白(E-cadherin、N-cadherin、vimentin)表达的影响,以及在此基础上同时敲低靶基因的表达后,以上蛋白表达的变化。结果:miR-671-5p的表达在HCC组织中明显高于其癌旁组织,在各种HCC细胞系中均明显高于正常肝细胞,且随着样本肿瘤分期与HCC细胞的侵袭力的增加而升高(均P0.05);TCGA数据库分析也显示,miR-671-5p在HCC组织中的表达量明显高于癌旁组织(P0.05)。miR-671-5p的表达水平与AFP水平、肿瘤数目、静脉侵犯、Edmondson-Steiner分级及TNM分期明显有关(均P0.05)。转染miR-671-5p抑制物后,MHCC-97H细胞的增殖、侵袭及迁移能力均明显降低(均P0.05)。生物信息学分析及双荧光素酶实验均显示丝切蛋白2(CFL2)是miR-671-5p潜在靶基因,TCGA数据库分析也显示miR-671-5p与CFL2的表达呈负相关(均P0.05)。降低MHCC-97H细胞中miR-671-5p的表达后,CFL2蛋白的表达水平升高,同时EMT相关蛋白表达明显降低(均P0.05),但同时干扰CFL2的表达后,以上变化均有明显程度的逆转(均P0.05)。结论:miR-671-5p在HCC中表达上调,且与HCC的不良临床病理特征密切相关。miR-671-5p可促进HCC细胞的增殖、侵袭、迁移,其机制可能与抑制CFL2的表达而促进EMT发生有关。