原发性肝癌中LncRNA OSER1-AS1与miR-612表达的相关性及生物学意义

目的 研究原发性肝细胞癌（HCC）中LncRNA OSER1-AS1与miR-612表达的相关性及生物学意义。方法 收集2017年3月-2020年3月华北理工大学附属医院手术切除并保存的HCC组织及对应的癌旁组织,培养HCC细胞株SMMC-7721、HepG2、BEL-7402及正常肝细胞株HL-7702,检测LncRNA OSER1-AS1、miR-612的表达水平。HepG2细胞分组并转染阴性对照（NC） siRNA、LncRNA OSER1-AS1 siRNA、NC miR、miR-612模拟物、miR-612抑制物,检测存活率、凋亡率及LncRNA OSER1-AS1、miR-612、叉头框转录因子M1(FOXM1)表达水平。结果 HCC组织中LncRNA OSER1-AS1的表达水平高于癌旁组织、miR-612的表达水平低于癌旁组织且LncRNA OSER1-AS1与miR-612呈负相关;肝癌细胞株SMMC-7721、HepG2、BEL-7402中LncRNA OSER1-AS1的表达水平高于正常肝细胞株HL-7702、miR-612的表达水平低于正常肝细胞株HL-7702...     

lncRNA PVT1通过靶向miR-761对缺氧复氧诱导的心肌细胞损伤的影响

目的 探讨lncRNA PVT1对缺氧复氧(H/R)诱导的心肌细胞凋亡、氧化应激的影响及其对miR-761的调控作用.方法 采用H/R诱导大鼠心肌细胞H9c2建立细胞损伤模型,分别将si-NC、si-PVT1、miR-mimics-NC、miR-761 mimics、si-PVT1与miR-inhibitor-NC、s...     

荞麦七水提物通过调控LncRNA SOX21-AS1/miR-451a通路抑制胃癌细胞增殖、迁移、侵袭的机制

目的 探索荞麦七水提物对胃癌细胞增殖、迁移、侵袭的影响及其分子机制。方法 实时荧光定量PCR(qPCR)检测胃癌组织长链非编码RNA(LncRNA)SOX21反义RNA1(SOX21-AS1)和miR-451a表达。用10 mg/ml、20 mg/ml、40 mg/ml荞麦七水提物处理胃癌细胞MKN45,qPCR检测LncRNA SOX21-AS1和miR-451a表达,噻唑蓝(MTT)检测细胞增殖,Transwell小室法检测细胞迁移、侵袭,Western印迹检测细胞周期蛋白(Cyclin)D1、p21、p27、基质金属蛋白酶(MMP)-2、MMP-9、MMP-14蛋白表达。在MKN45细胞中转染si-SOX21-AS1,评估抑制SOX21-AS1表达在细胞增殖、迁移、侵袭中的作用。生物信息学结合双荧光素酶报告实验分析LncRNA SOX21-AS1与miR-451a的靶向关系。在细胞中转染pcDNA-SOX21-AS,并使用40 mg/ml荞麦七水提物处理,观察LncRNA SOX21-AS1过表达对荞麦七水提物诱导的胃癌MKN45细胞增殖、迁移、侵袭的作用。结果 与癌旁组织比较,...     

干扰NCK1-AS1抑制乳腺癌细胞发生发展

目的 探索长链非编码RNA(lncRNA)NCK1-AS1在乳腺癌细胞增殖、迁移和侵袭中的作用和分子机制。方法 定量逆转录PCR(RT-qPCR)和Western印迹检测25例乳腺癌组织和癌旁组织中NCK1-AS1、miR-361-5p与Rho相关蛋白激酶(ROCK)1蛋白的表达。将乳腺癌细胞分为si-NCK1-AS1组、si-NC组、miR-361-5p组、miR-NC组、si-NCK1-AS1+anti-miR-361-5p组和si-NCK1-AS1+anti-miR-NC组,应用细胞计数试剂盒(CCK)-8检测细胞抑制率,集落形成实验检测细胞集落形成数,划痕实验检测细胞迁移距离,Transwell实验检测细胞侵袭。荧光素酶活性检测分析NCK1-AS1与miR-361-5p、miR-361-5p与ROCK1的靶向关系。结果 乳腺癌组织中NCK1-AS1、ROCK1蛋白的表达水平比癌旁组织高,miR-361-5p表达水平比癌旁组织低,差异有统计学意义(P<0.05)。si-NCK1-AS1组乳腺癌细胞miR-361-5p表达水平、抑制率比si-NC组升高,ROCK1蛋白的表达水...     

lncRNA CCDC183-AS1通过靶向miR-1301-3p调控胃癌AGS细胞的增殖、迁移和侵袭

背景长链非编码RNA(long non-coding RNA, lnc RNA)CCDC183-AS1在肝细胞癌中表达上调,促进肝细胞癌进展.但lnc RNA CCDC183-AS1对胃癌的影响及其分子机制还未知. Star Base预测显示, lnc RNA CCDC183-AS1可能靶向结合miR-1301-3p.本研究假设lnc RNA CCDC183-AS1可靶向调控miR-1301-3p影响胃癌细胞的增殖、迁移和侵袭,进而影响胃癌发展进程.目的探讨lnc RNA CCDC183-AS1对胃癌AGS细胞增殖、迁移和侵袭的影响以及其分子机制.方法选取本院30例胃癌组织及匹配的癌旁组织;实时荧光定量PCR(real-time fluorescence quantitative PCR,RT-q PCR)检测lnc RNACCDC183-AS1和miR-1301-3p表达及变化;四甲基偶氮唑盐比色法(methy l thiazolyetelrazlium,MTT)检测细胞增殖, Transwell检测细胞迁移侵袭,蛋白质印迹(Western blot)检测细胞周期素D1(Cyclin D1)、基质金属蛋白酶2(matrix metalloproteinase 2, MMP-2)、基质金属蛋白酶9(matrix metalloproteinase9,MMP-9)和p21蛋白的表达; AGS细胞中分别转染si-CCDC183-AS1、miR-1301-3p,并利用上述检测细胞增殖、迁移侵袭能力的变化;Star Base预测显示lnc RNACCDC183-AS1的序列中含有与miR-1301-3p互补的核苷酸序列,双荧光素酶报告实验鉴定其靶向关系.结果与癌旁组织比较,胃癌组织中lnc RNA CCDC183-AS1和miR-1301-3p的表达水平分别显著升高和降低(P 0.05).抑制lnc RNACCDC183-AS1表达或过表达miR-1301-3p后, AGS细胞的增殖和迁移侵袭能力下降, Cyclin D1、MMP-2和MMP-9表达水平降低, p21表达水平升高(P0.05). lnc RNA CCDC183-AS1靶向调控miR-1301-3p表达(P 0.05).下调miR-1301-3p表达逆转了抑制lnc RNA CCDC183-AS1表达对胃癌AGS细胞增殖、迁移和侵袭的影响.结论抑制lnc RNA CCDC183-AS1通过靶向上调miR-1301-3p表达调控胃癌AGS细胞的增殖、迁移和侵袭.     

LncRNA NNT-AS1通过靶向miR-496调控卵巢癌细胞增殖、迁移及侵袭的分子机制

目的 探讨长链非编码RNA NNT-AS1(LncRNA NNT-AS1)靶向微小核糖核酸(miR)-496抑制卵巢癌细胞增殖、迁移及侵袭的分子机制.方法 实时荧光定量聚合酶链反应(qRT-PCR)检测LncRNA NNT-AS1与miR-496在卵巢癌细胞及正常卵巢上皮细胞中的表达;双荧光素酶报告基因检测LncRNA...     

lncRNA FGD5-AS1靶向miR-421对缺氧/复氧诱导的心肌细胞损伤的影响

目的 探讨长链非编码RNA(lncRNA)FGD5-AS1与微小RNA-421(miR-421)的靶向调控关系及其对缺氧/复氧(H/R)诱导的心肌细胞损伤的影响.方法 利用H/R诱导心肌细胞H9C2损伤,采用实时荧光定量PCR检测lncRNA FGD5-AS1和miR-421表达.在心肌细胞中转染pcDNA-FGD5-...     

右美托咪定通过调控LncRNA HOXA11-AS/miR-515-5p抑制膀胱癌细胞增殖并诱导细胞凋亡

目的 探讨右美托咪定(Dex)通过调控长链非编码RNA HOXA11-AS(LncRNA HOXA11-AS)/微小RNA-515-5p(miR-515-5p)对膀胱癌细胞增殖、凋亡的影响及作用机制。方法 采用不同浓度(25、50、100、200 ng/ml)的Dex处理膀胱癌T24细胞,四甲基偶氮唑蓝(MTT)比色法检测细胞存活率;流式细胞术检测Dex对T24细胞凋亡率的影响;实时荧光定量聚合酶链反应(qRT-PCR)检测Dex对HOXA11-AS、miR-515-5p表达水平的影响。利用脂质体方法分别将si-HOXA11-AS及阴性对照(si-NC)、miR-515-5p模拟物(mimics)及阴性对照(miR-NC)转染至T24细胞,通过MTT、流式细胞术检测细胞增殖与凋亡能力变化。双荧光素酶报告实验确定HOXA11-AS与miR-515-5p的靶向关系。Western印迹检测细胞周期蛋白(Cyclin)D1、活化的含半胱氨酸的天冬氨酸蛋白水解酶(C-caspase)-3表达量。结果 Dex可明显提高细胞凋亡率及C-caspase-3、miR-515-5p的表达水平(P<0...     

牡荆苷上调FGD5-AS1抑制缺氧复氧诱导的心肌细胞氧化应激和凋亡

[目的]探究牡荆苷对缺氧复氧(H/R)诱导的心肌细胞损伤的影响及其与FGD5-AS1的调控关系。[方法]大鼠心肌细胞H9c2分为对照组,H/R组,H/R+牡荆苷低、中、高剂量组,H/R+pcDNA组,H/R+pcDNA-FGD5-AS1组,H/R+牡荆苷+si-NC组和H/R+牡荆苷+si-FGD5-AS1组。流式细胞术检测细胞凋亡,Western blot检测Caspase-3、cleaved Caspase-3蛋白表达,试剂盒检测SOD活性和MDA含量,RT-PCR检测FGD5-AS1表达。[结果]与H/R组比较,H/R+牡荆苷低、中、高剂量组凋亡率各降低13%、25%、48%,Caspase-3蛋白表达量各下降21%、38%、56%,cleaved Caspase-3蛋白表达各下降17%、40%、65%,MDA含量各下降15%、36%、52%,SOD活性升高0.88、2.73、3.86倍,FGD5-AS1表达各升高0.84、1.84、3.00倍(均P<0.05),呈浓度依赖性。与H/R+pcDNA组比较,H/R+pcDNA-FGD5-AS1组凋亡率、Caspase-3和cl...     

lncRNA SLC8 A1-AS1在脓毒症大鼠心肌组织中的表达及其对心肌细胞凋亡和炎症因子分泌的影响

目的 研究lncRNA SLC8A1-AS1在脓毒症大鼠心肌组织中表达及其对心肌细胞凋亡和炎症因子分泌的影响.方法 qRT-聚合酶链反应(PCR)检测脓毒症大鼠心肌组织中SLC8A1-AS1表达水平.心肌H9C2细胞分成Control组(正常培养)、脂多糖(LPS)组(LPS诱导处理)、Vector+LPS组(转染阴性...     

Long chain noncoding RNA-ROR promotes hypoxic injury of cardiomyocytes by targeting the miR-145/HAX-1 axis

BackgroundLong non-coding RNAs (lncRNAs) are a class of non-protein coding RNAs greater than 200 nucleotides (nt) in length which have been shown to be significantly highly expressed in the heart tissue of mice undergoing thoracic aortic arch constriction (TAC). Micro RNAs (miRNAs) are a class of non-protein-coding RNAs. Many miRNAs have been reported to play a key role in the progression of myocardial hypertrophy. In this study, we aimed to investigate whether lncRNA reprogramming regulators (ROR) promotes hypoxic injury in cardiomyocytes by targeting and regulating the miR-145/HS1-associated protein X-1 (HAX-1) axis.MethodsA mouse model of myocardial hypertrophy was established by conventional TAC method, and the cardiomyocytes were isolated. We transfected pcDNA3.0-ROR vector, pcDNA3.0-HAX-1 vector plasmid, and miR-145 simulant into cardiomyocytes with Lipofectamine 2000. Luciferase reporter gene was used to analyze the targeting relationship between genes.ResultsThe expression of ROR in hypertrophic myocardium was significantly increased after phenylephrine (PE) intervention. After transfection with si-ROR, the ROR expression in hypertrophic cardiomyocytes treated with PE decreased significantly. Levels of lactate dehydrogenase (LDH), malondialdehyde (MDA), creatine kinase (CK) decreased and superoxide dismutase (SOD) increased. The expression of miR-145 in cardiomyocytes was significantly down-regulated after PE treatment. In hypertrophic cardiomyocytes, after up-regulating the expression of miR-145, the relative messenger ribonucleic acid (mRNA) and protein expressions of atrial natriuretic peptide (ANP) and B-type natriuretic peptide (BNP) induced by PE decreased. Compared with the miR-NC group, wild type (WT)-ROR activity in the miR-145 group was significantly inhibited (P<0.05), and mutant (MUT)-ROR activity had no significant change (P>0.05). When cardiomyocytes were transfected with HAX-1 3''URT WT vector along with miR-145 simulant, miR-145 inhibitor, and their respective controls. Compared with the control groups, the luciferase activity of cells transfected with simulant was significantly decreased (P<0.05), and increased in inhibitor group (P<0.05). Transfection of HAX-1 3''URT mutant vector did not show this phenomenon. ROR was negatively correlated with miR-145 expression and positively correlated with HAX-1 mRNA.ConclusionsThe lncRNA ROR can promote the expression of HAX-1 by competitive binding with miR-145, so as to promote the pathophysiological process of myocardial hypertrophy.     

miR-499a-5p通过靶向APC减轻氧化应激对心肌细胞的损伤

目的研究miR-499a-5p对过氧化氢(H_2O_2)诱导的心肌细胞H9c2增殖、凋亡的影响,并探讨其作用机制。方法用细胞计数试剂盒(CCK-8)检测不同浓度H_2O_2(100、200、400、800μmol/L)处理6 h的H9c2细胞的存活率,筛选400μmol/L H_2O_2处理的H9c2细胞作为模型组。将模型组细胞分为miR-NC组、miR-499a-5p组、si-NC组、si-APC组、miR-499a-5p+pcDNA组、miR-499a-5p+pcDNA-APC组,用流式细胞术、免疫印迹(Western blot)、酶联免疫吸附试验(ELISA)检测各组细胞的存活率、凋亡率、活性氧(ROS)、超氧化物歧化酶(SOD)、丙二醛(MDA)及增殖凋亡相关蛋白增殖细胞核抗原(PCNA)、细胞周期蛋白依靠性激酶抑制剂(P21)、B淋巴细胞瘤-2基因(Bcl-2)、Bcl-2相关的X基因(Bax)的表达。结果 H_2O_2(100、200、400、800μmol/L)呈浓度依赖性抑制H9c2细胞的存活,最适浓度为400μmol/L。模型组细胞中miR-499a-5p表达显著降低,APC表达显著升高;过表达miR-499a-5p、抑制APC均可明显减轻H_2O_2诱导的H9c2细胞的增殖抑制、凋亡促进和氧化应激作用,并且miR-499a-5p还可靶向抑制APC。过表达APC逆转了miR-499a-5p对H_2O_2诱导的心肌细胞损伤。结论 miR-499a-5p可调控H_2O_2诱导的心肌细胞增殖、凋亡和氧化应激,其机制与靶向抑制APC有关,将可为氧化应激引起的心肌细胞损伤的治疗提供新靶点。     

Insulin protects cardiomyocytes against reoxygenation-induced hypercontracture by a survival pathway targeting SR Ca2+ storage

OBJECTIVE: Experimental and clinical studies have shown that administration of insulin during reperfusion is cardioprotective, but the underlying mechanisms are still unknown. In this study, we investigated in isolated rat cardiomyocytes subjected to hypoxia and reoxygenation whether administration of insulin during reoxygenation reduces reoxygenation-induced hypercontracture, a hallmark of acute reperfusion injury. The effects of insulin on potential pro-survival kinases, i.e., PI 3-kinase, NO synthase (eNOS), and cGMP-dependent protein kinase (PKG), and on cytosolic Ca2+ control in reoxygenated cardiomyocytes were investigated. RESULTS: Administration of insulin (10 mU/L) during reoxygenation protected cardiomyocytes against hypercontracture development (cell length as % of end-hypoxic length: control 61.6+/-3.2; insulin 76.3+/-2.9; n=26; p<0.05 vs. control). Cytosolic [Ca2+] recovery during the first 2 min of reoxygenation was accelerated (fura-2 ratio after 2 min of reoxygenation; control 1.01+/-0.05; insulin 0.79+/-0.04; n=26; p<0.05 vs. control). The beneficial effects of insulin on cytosolic [Ca2+] recovery and hypercontracture were suppressed in the presence of inhibitors of PI 3-kinase (LY294002, 1 microM), eNOS (L-NMMA, 100 microM), PKG (KT 5823, 1 microM), or sarcoplasmic reticulum Ca2+ pump (SERCA) (thapsigargin, 150 nM). Insulin increased phosphorylation and activity of eNOS and augmented phospholamban phosphorylation in reoxygenated cardiomyocytes. Correlated with phospholamban phosphorylation, insulin also augmented SR Ca2+ load. CONCLUSIONS: Insulin protects cardiomyocytes against reoxygenation-induced hypercontracture. This is due to acceleration of cytosolic [Ca2+] recovery by enhanced Ca2+ sequestration into the sarcoplasmic reticulum via SERCA activation. This protective mechanism is activated through the survival pathway consisting of PI 3-kinase, eNOS, and PKG.     

miR-206 enhances nasopharyngeal carcinoma radiosensitivity by targeting IGF1

Radioresistance remains a major problem in nasopharyngeal carcinoma (NPC) treatment. However, the underlying molecular mechanisms of NPC radioresistance remain poorly understood. The present study aimed to investigate the potential role and mechanism of miR-206 in NPC radioresistance. We observed that miR-206 was down-regulated in radioresistant NPC cells. Furthermore, restoration of miR-206 in CNE2-IR cells suppressed enhanced radiosensitivity of NPC cells. In contrast, inhibition of miR-206 in CNE2 cells reduced the radiosensitivity. We also found that miR-206 directly targeted IGF1 and inhibited the PI3K/AKT pathway. Our data demonstrate that miR-206 sensitizes NPC cell to irradiation by targeting IGF1, highlighting the therapeutic potential of miR-206 in NPC radiosensitization.     

先天性心脏病相关性肺动脉高压患者血miR-18a、miR-27b、miR-130a、miR-204水平研究

目的 探索先天性心性脏病相关性肺动脉高压（PAH）患者血清中miR-18a、miR-27b、miR-130a和miR-204的表达水平,以及与PAH的相关性.方法 收集昆明医科大学附属延安医院心血管内科2012年4～12月被确诊为先天性心脏病的患者78例,其中肺动脉压正常组37例,合并轻、中度肺动脉高压组25例,重度肺动脉高压组16例;另设正常对照组20例.应用实时荧光定量PCR （Taqman探针法）检测miR-18a、miR-27b、miR-130a、miR-204在血液中的表达水平,分析先天性心脏病相关性肺动脉高压与miR-NA表达水平之间的关系.结果 先天性心脏病相关肺动脉高压患者血miR-18a、miR-27b、miR-130a表达水平显著上调,miR-204表达水平显著下调.随着肺动脉压力的不断增高,血miR-18a、miR-27b、miR-130a表达量明显升高,miR-204表达量显著下调.直线相关分析显示,先天性心脏病继发性肺动脉高压患者血miR-18a、miR-27b、miR-130a表达水平与肺动脉压力存在高度正相关关系（r=0.927,r=0.927,r=0.933,P＜0.01）,miR-204表达水平与肺动脉压力存在高度负相关关系（r=-0.773,P＜0.01）.结论 血miR-18a、miR-27b、miR-130a、miR-204水平可作为判断先天性心脏病合并肺动脉高压较好的临床血清学指标,预判价值较高.     

Remote ischemic preconditioning protects against cerebral ischemia injury in rats by upregulating miR-204-5p and activating the PINK1/Parkin signaling pathway

Metabolic Brain Disease - Remote ischemic preconditioning (RiPC) is the process where preconditioning ischemia protects the organs against the subsequent index ischemia. RiPC is a protective method...