miR-218-5p靶向B细胞淋巴瘤因子3表达影响白血病K562细胞的增殖和凋亡

目的 探讨微小RNA-218-5p(miR-218-5p)靶向B细胞淋巴瘤因子3(BCL3)基因对白血病细胞增殖和凋亡的影响.方法 反转录及荧光定量PCR(RT-qPCR)和蛋白质印迹法(Western blotting)检测正常人骨髓细胞和白血病骨髓细胞中miR-218-5p和BCL3的表达水平.以白血病细胞K562...     

长链非编码RNA OPA相互作用蛋白5反向转录序列1靶向调控微RNA-128-3p对结直肠癌细胞增殖、侵袭和转移的影响

目的 探究长链非编码RNA OPA相互作用蛋白5反向转录序列1(lncRNA OIP5-AS1)在结直肠癌中的表达情况及靶向调控微RNA-128-3p(miR-128-3p)对结直肠癌细胞增殖、侵袭和转移的影响。方法 采用实时荧光定量PCR(qPCR)定量分析2017年1月至2018年12月在郑州大学人民医院住院并进行手术治疗的38例结直肠癌病人癌组织及相应癌旁组织、结直肠癌细胞系（SW480、SW620、HT-29和LoVo）及人正常结直肠黏膜细胞FHC中lncRNA OIP5-AS1和miR-128-3p的表达。将SW620细胞设为si-OIP5-AS1组、si-NC组、miR-128-3p mimic组、mimic-NC组、miR-128-3p inhibitor+si-OIP5-AS1组和inhibitor-NC+siOIP5-AS1组,采用细胞计数试剂盒（CCK-8）实验和克隆形成实验检测细胞增殖能力,采用划痕实验和transwell实验检测细胞侵袭与迁移能力,采用蛋白质印迹法检测E2F1、细胞周期蛋白D1(Cyclin D1)、波形蛋白（Vimentin）、N-钙黏蛋白（N...     

微小RNA-152-3p 对结肠癌细胞增殖、迁移和侵袭的影响及其作用机制研究

目的探讨微小RNA(miR)-152-3p对结肠癌细胞的增殖、迁移和侵袭的影响及机制。方法2019年2月至2020年4月,将结肠癌SW480细胞分为miR-152-3p模拟物阴性对照(miR-NC)组、miR-152-3p模拟物(miR-152-3p)组、抑制物(anti-miRNC)组、miR-152-3p抑制物(anti-miR-152-3p)组、阴性对照(si-NC)组、沉默转移相关蛋白2(si-MTA2)组、miR-152-3p模拟物+空载体(miR-152-3p+pcDNA3.1)组、miR-152-3p模拟物+过表达MTA2(miR-152-3p+pcDNA3.1-MTA2)组,均用脂质体法转染至结直肠癌SW480细胞中,另取未转染结直肠癌SW480细胞记为Control组。采用实时荧光定量逆转录聚合酶链反应(qRT-PCR)检测miR-152-3p和MTA2 mRNA的表达水平;蛋白质印迹法测定蛋白的表达;MTT法检测细胞活性;Transwell检测细胞迁移和侵袭;双荧光素酶报告基因检测实验检测荧光活性。结果结肠癌HCT116、SW480及LoVo细胞中miR-152-3p表达分别为0.72±0.04、0.29±0.02、0.49±0.01,人正常结肠上皮细胞NCM460中miR-152-3p表达为1.06±0.12,与正常结肠上皮细胞NCM460相比,结肠癌细胞HCT116、LoVo、SW480中MTA2 mRNA和蛋白较高,miR-152-3p较低(P<0.05);Control组、miR-NC组、miR-152-3p组、si-NC组及si-MTA2组结肠癌SW480细胞吸光度分别为0.92±0.22、0.96±0.17、0.31±0.07、0.99±0.17及0.32±0.09,细胞迁移数分别为(172.00±23.52)个、(169.00±20.66)个、(53.67±12.22)个、(155.67±16.8)个及(54.33±8.74)个,细胞侵袭数分别为(124.67±10.02)个、(122.33±9.45)个、(26.00±5.00)个、(108.33±10.02)个及(42.00±4.00)个,与miR-NC 组相比,miR-152-3p 组SW480细胞中细胞周期蛋白D1(cyclin D1)、基质金属蛋白酶(MMP)-2及SW480细胞活性、迁移和侵袭数量均较低,周期素依赖激酶抑制剂p21(P21)及上皮钙黏素(E-cadherin)较高(P<0.05);与si-NC组相比,si-MTA2组SW480细胞中cyclin D1、MMP-2及SW480细胞活性、迁移和侵袭数量均较低,P21及E-cadherin较高(P<0.05)。转染miR-152-3p和MTA2野生型表达载体的结肠癌SW480细胞荧光素酶活性显著降低(P<0.05)。相比miR-152-3p+pcDNA3.1组,miR-152-3p+pcDNA3.1-MTA2组SW480细胞中P21、E-cadherin的表达较低,MTA2、cyclin D1、MMP-2蛋白的表达较高,SW480细胞活性、迁移、侵袭数量较高(P<0.05)。结论miR-152-3p可能通过下调MTA2抑制结肠癌细胞的增殖、迁移和侵袭。     

长链非编码RNA母系表达基因8靶向微小RNA-497-5p调控血管瘤血管内皮细胞的增殖和凋亡

目的 探讨长链非编码RNA母系表达基因8(MEG8)靶向微小RNA(miR)-497-5p对血管瘤血管内皮细胞的增殖和凋亡的影响.方法 实时荧光定量逆转录聚合酶链反应(qRT-PCR)检测河南中医药大学第一附属医院2017年1月至2018年6月收集的52例血管瘤组织和与其对应的瘤旁正常皮肤组织中MEG8和miR-497...     

LncRNA PTCSC3 inhibits the proliferation,invasion and migration of cervical cancer cells via sponging miR-574-5p

Dysregulation of long non-coding RNA papillary thyroid carcinoma susceptibility candidate 3 (lncRNA PTCSC3) has been found to correlate with various types of cancers. Quantitative RT-PCR showed a down-regulation of PTCSC3 in cervical cancer tissues compared with normal cervical tissues. The present study aimed to investigate the role of lncRNA PTCSC3 in cervical cancer and the underlying mechanisms. PTCSC3 was overexpressed in cervical cancer cell lines C-33A and Hela by transfection with pcDNA3.1-lncRNA PTCSC3 expressing plasmid. Overexpression of lncRNA PTCSC3 inhibited cell proliferation, induced cell cycle arrest, and suppressed cell invasion and migration using CCK8 assay, flow cytometry, Transwell assay and wound healing examination, respectively. Western blotting analysis showed that PTCSC3 overexpression decreased the expression of cyclinD1, matrix metalloproteinases 9 (MMP9), N-cadherin and β-catenin and increased E-cadherin expression. Further, PTCSC3 negatively regulated miR-574-5p expression and dual-luciferase assay verified the binding activity between miR-574-5p and lncRNA PTCSC3. Enforced up-regulation of miR-574-5p abolished the inhibitory effect of lncRNA PTCSC3 on cervical cancer cell proliferation, invasiveness and mobility. Taken together, lncRNA PTCSC3 inhibited cell growth and metastasis via sponging miR-574-5p in cervical cancer. Therefore, we demonstrate the tumour-suppressive function of lncRNA PTCSC3 in cervical cancer and suggest that PTCSC3 is a potential therapeutic target for cervical cancer.     

肿瘤蛋白翻译控制 1的反义 RNA 1在肺癌中的表达及其对肺癌细胞增殖、迁移和侵袭的影响

目的探讨肿瘤蛋白翻译控制 1的反义 RNA 1(TPT1-AS1)在肺癌中的表达及其对肺癌细胞增殖、迁移和侵袭的影响和作用机制。方法收集于 2017年1月至 2018年12月在信阳市中心医院心胸外科行手术治疗的 46例肺癌组织和对应的癌旁组织,实时荧光定量 PCR(RT-qPCR)检测组织中 TPT1-AS1和微小 RNA-671-5p(miR-671-5p)表达, Pearson相关性分析肺癌组织中 TPT1-AS1和miR671-5p表达的相关性。同时,于2019年5月至 2020年4月期间,通过体外培养肺癌细胞 A549,双荧光素酶报告基因实验验证了细胞中 TPT1-AS1和 miR-671-5p调控关系。另将 A549细胞分为对照组、小干扰 RNA阴性序列(si-NC)组、 TPT1-AS1小干扰 RNA(si-TPT1AS1)组、 si-TPT1-AS1+抑制剂阴性序列(anti-miR-NC)组和 si-TPT1-AS1+miR-671-5p抑制剂(anti-miR-671-5p)组,甲基噻唑蓝染色法(MTT)检测细胞增殖, Transwell检测细胞迁移和侵袭,蛋白质印迹实验检测细胞周期蛋白 D1(CyclinD1)基质金属蛋白酶(MMP)-2和 MMP-9蛋白表达。结果肺癌组织中 TPT1-AS1表达量较癌旁组织显著升高［(1.88±0.12)(1.01±0.08)、P<0.05］,miR-671-5p表达量较癌旁组织显著降低［(0.45±0.04)(1.01±0.06)P<0.05］。Pearson相关性分析显示,肺癌组比织中TPT1-A,S1和 miR-671-5p呈负相(r= 0.63,P<0.05)。TPT1-AS1在A5比49细胞中负调,控 miR-671-5p表达。 si-TPT1-AS1组 A549细胞存活率、迁移数和侵袭数分别为(关53.24±2.81)%、(63.11±6.51)个和( 33.78±3.23)个,均低于 si-NC组［分别为( 98.78±2.57)%、(147.44±11.08)个和(101.67±9.95)个,均P<0.05］。CyclinD1、MMP-2和MMP-9蛋白在 si-TPT1-AS1组的表达量分别为(0.43±0.05)(0.21±0.03)(0.43±0.04),较si-NC组均降低［分别为(0.86±0.04)(0.55±0.05)(0.48±0.07)均P<0.05］。si-TPT1-AS1+anti-miR-671-、5p组A549细、胞存活率、迁移数和侵袭数及 CyclinD1、MMP-2和M、MP-9蛋白表、达分别为(8,5.43±2.94)%、(125.78±10.59)个、(88.78±7.19)个、(0.75±0.03)、(0.48±0.03)、(0.43±0.04),较 si-TPT1-AS1+anti-miR-NC组均升高［分别为(54.36±2.95)%、(63.78±6.48)个、(33.56±3.54)个、(0.41±0.03)、(0.22±0.03)、(0.21±0.04),均P<0.05］。对照组与 si-NC组、 si-TPT1-AS1组与 si-TPT1-AS1+anti-miR-NC组各检测指标比较均差异无统计学意义(P>0.05)。结论肺癌组织中 TPT1-AS1表达升高, miR-671-5p表达降低,且两者呈负相关。 TPT1-AS1可能通过靶向下调 miR-671-5p的表达促进肺癌细胞增殖、迁移和侵袭。     

Differentially expressed mRNAs and their upstream miR-491-5p in patients with coronary atherosclerosis as well as the function of miR-491-5p in vascular smooth muscle cells

MicroRNAs (miRNAs) regulate gene expression and are biomarkers for coronary atherosclerosis (AS). A novel miRNA-mRNA regulation network of coronary AS still needs to be disclosed. The aim of this study was to analyze potential mRNAs in coronary AS patients and the role of their upstream miR-491-5p in vascular smooth muscle cells (VSMCs). We first confirmed top ten mRNAs according to the analysis from Gene Expression Omnibus database ({"type":"entrez-geo","attrs":{"text":"GSE132651","term_id":"132651"}}GSE132651) and examined the expression levels of them in the plaques and serum from AS patients. Five mRNAs (UBE2G2, SLC16A3, POLR2C, PNO1, and AMDHD2) presented significantly abnormal expression in both plaques and serum from AS patients, compared with that in the control groups. Subsequently, they were predicted to be targeted by 11 miRNAs by bioinformatics analysis. Among all the potential upstream miRNAs, only miR-491-5p was abnormally expressed in the plaques and serum from AS patients. Notably, miR-491-5p overexpression inhibited viability and migration, and significantly increased the expression of contractile markers (α-SMA, calponin, SM22α, and smoothelin) in VSMCs. While silencing miR-491-5p promoted viability and migration, and significantly suppressed the expression of α-SMA, calponin, SM22α, and smoothelin. Overall, miR-491-5p targeted UBE2G2, SLC16A3, and PNO1 and regulated the dysfunctions in VSMCs.     

下调微小 RNA-425-5p靶向第 10号染色体同源缺失性磷酸酶-张力蛋白调控宫颈癌细胞侵袭和迁移的分子机制

目的研究下调微小 RNA(miR)-425-5p靶向第 10号染色体同源缺失性磷酸酶 -张力蛋白( PTEN)调控宫颈癌 Caski细胞侵袭和迁移的分子机制。方法本研究起止时间为 2018年 12月至 2019年 11月。以宫颈癌 Caski细胞为探讨对象,转染 miR-425-5p抑制剂( inhibitor),PTEN siRNA和 miR-425-5p inhibitor共转染到宫颈癌 Caski细胞; MTT法测定细胞增殖, Transwell小室测定细胞侵袭和迁移;在线靶基因预测软件发现 PTEN与 miR-425-5p可能互为靶向关系,荧光素酶报告系统鉴定靶向关系;蛋白质印迹法( Western blotting)测定上皮钙黏素( E-cadherin)、神经钙黏素( N-cadherin)蛋白表达。结果转染 miR-425-5p inhibitor后的宫颈癌 Caski细胞 miR-425-5p表达量降低［( 0.96±0.15)比( 0.32±0.04)］,增殖［( 0.47±0.05)比( 0.23±0.04)］、侵袭［( 95.32±7.86)比( 63.17±5.22)］及迁移［( 140.88±13.94)比( 89.64±9.57)］能力降低, E-cadherin表达上调［( 0.29±0.05)比( 0.65±     

长链非编码RNA NR2F1-AS1靶向微小RNA-145-5p调控结肠癌细胞增殖、迁移和侵袭的分子机制

目的 探讨长链非编码RNA(lnc RNA)核受体亚族2F组成员1反义RNA(NR2F1-AS1)对结肠癌细胞增殖、迁移和侵袭的影响及作用机制.方法 收集2015年3月至2017年5月青海省第五人民医院外科手术切除并经病理证实为原发性结肠腺癌组织25例,另留取距肿瘤边缘3 cm的癌旁组织(正常结肠组织).实时荧光定量P...     

Influence of p53 and p21(WAF1) expression on sensitivity of cancer cells to cladribine

The present study was performed to gain insight into the role of p53 and p21(WAF1) on the cytotoxicity of the purine analogue cladribine (2-CdA) on cancer cells. Drug sensitivity, cell cycle distribution and drug-induced cell death were compared in three lines derived from the colorectal carcinoma HCT116: the p53+/+ cell line containing wild-type p53 and the p53-/- and p21(WAF1)-/- lines, in which both alleles of p53 or p21(WAF1) were deleted by homologous recombination, respectively. p53-/- and p21(WAF1)-/- cells were significantly more resistant to the cytotoxic effects of 2-CdA than the p53+/+ cells. p53+/+ cells and p21(WAF1)-/-, but not p53-/- cells, displayed wt-p53 protein accumulation and arrested in S-phase after exposure to 2-CdA. mRNA analysis of the transporter hENT1 and of enzymes involved in drug metabolism did not show alterations which might explain a drug-resistant phenotype in the p53-/- or p21(WAF1)-/- cells. Exposure of p53+/+ cells to 2-CdA resulted in expression of p21(WAF1) mRNA and protein, enhanced expression of uncleaved PARP-1, and a higher degree both of apoptosis and necrosis than in p53-/- and p21(WAF1)-/- cells exposed to 2-CdA. Addition of the specific PARP-1 inhibitor 3-AB to 2-CdA-treated cells rendered p53+/+ cells resistant to this drug. Bax levels were reduced in the p53-/- while they increased in the p53+/+ line and remained stable in the p21(WAF1)-/- cells. We conclude that p53 and p21(WAF1) status of cancer cells influences their sensitivity to 2-CdA cytotoxicity. This may involve alterations in the apoptotic cascade as well as in PARP-1-dependent cell death.     

Suppression of TRIM8 by microRNA-182-5p restricts tumor necrosis factor-α-induced proliferation and migration of airway smooth muscle cells through inactivation of NF-Κb

MicroRNAs (miRNAs) have emerged as critical modulators involved in the regulation of airway remodeling in asthma. MicroRNA-182-5p (miR-182-5p) has been reported as a key miRNA in regulating the proliferation and migration of various cell types, and its dysfunction contributes is implicated in a wide range of pathological processes. Yet, it remains unknown whether miR-182-5p modulates the proliferation and migration of airway smooth muscle (ASM) cells during asthma. In the present study, we aimed to determine the potential role of miR-182-5p in regulating the proliferation and migration of ASM cells induced by tumor necrosis factor (TNF)-α in vitro. We found that TNF-α stimulation markedly reduced miR-182-5p expression in ASM cells. Gain-of-function experiments showed that miR-182-5p upregulation suppressed the proliferation and migration of ASM cells induced by TNF-α. By contrast, miR-182-5p inhibition had the opposite effect. Notably, tripartite motif 8 (TRIM8) was identified as a target gene of miR-182-5p. TRIM8 expression was induced by TNF-α stimulation, and TRIM8 knockdown markedly impeded TNF-α-induced ASM cell proliferation and migration. Moreover, miR-182-5p overexpression or TRIM8 knockdown significantly downregulated the activation of nuclear factor-κB (NF-κB) induced by TNF-α. However, TRIM8 restoration partially reversed the miR-182-5p-mediated inhibitory effect on TNF-α-induced ASM cell proliferation and migration. In conclusion, our study indicates that miR-182-5p restricts TNF-α-induced ASM cell proliferation and migration through downregulation of NF-κB activation via targeting TRIM8. The results of our study highlight the potential importance of the miR-182-5p/TRIM8/NF-κB axis in the airway remodeling of asthma.