简介:AbstractBackground:Long non-coding RNA (lncRNA) actin filament-associated protein 1 antisense RNA 1 (AFAP1-AS1) functions as a competing endogenous RNA to regulate target genes expression by sponging microRNAs (miRs) to play cancer-promoting roles in cancer stem cells. However, the regulatory mechanism of AFAP1-AS1 in cervical cancer (CC) stem cells is unknown. The present study aimed to provide a new therapeutic target for the clinical treatment of CC.Methods:Hyaluronic acid receptor cluster of differentiation 44 variant exon 6 (CD44v6)(+) CC cells were isolated by flow cytometry (FCM). Small interfering RNAs of AFAP1-AS1 (siAFAP1-AS1) were transfected into the (CD44v6)(+) cells. The levels of AFAP1-AS1 were measured by quantitative real-time PCR (qRT-PCR). Sphere formation assay, cell cycle analysis, and Western blotting were used to detect the effect of siAFAP1-AS1. RNA pull-down and luciferase reporter assay were used to verify the relationship between miR-27b-3p and AFAP1-AS1 or vascular endothelial growth factor (VEGF)-C.Results:CD44v6(+) CC cells had remarkable stemness and a high level of AFAP1-AS1. However, AFAP1-AS1 knockdown with siAFAP1-AS1 suppressed the cell cycle transition of G(1)/S phase and inhibited self-renewal of CD44v6(+) CC cells, the levels of the stemness markers octamer-binding transcription factor 4 (OCT4), osteopontin (OPN), and cluster of differentiation 133 (CD133), and the epithelial-mesenchymal transition (EMT)-related proteins Twist1, matrix metalloprotease (MMP)-9, and VEGF-C. In the mechanism study, miR-27b-3p/VEGF-C signaling was demonstrated to be a key downstream of AFAP1-AS1 in the CD44v6(+) CC cells.Conclusions:LncRNA AFAP1-AS1 knockdown inhibits the CC cell stemness by upregulating miR-27b-3p to suppress VEGF-C.
简介:目的:探究miR-766-3p是否可通过调节靶基因SIRT6影响肝细胞癌(HCC)的发生与发展进程。方法:RT-PCR及Westernblot检测miR-766-3p及SIRT6在HCC组织及癌旁组织中的表达;CCK-8、流式凋亡检测技术、划痕实验及Transwell小室检测miR-766-3p/SIRT6对HCC细胞生长、凋亡、转移及侵袭能力的影响;荧光报告基因实验及westernblot技术检测miR-766-3p对SIRT6表达的影响。结果:miR-766-3p在HCC组织中低表达,而SIRT6高表达。过表达miR-766-3p通过与SIRT6的3’UTR区结合降低SIRT6的表达。上调miR-766-3p明显抑制HepG2细胞增殖、转移及侵袭能力,促进细胞凋亡;但SIRT6过表达后终止miR-766-3p的以上作用。结论:miR-766-3p通过靶向负调控SIRT6的表达抑制HCC进展。
简介:目的探讨microRNA199a3p对膀胱肿瘤细胞增殖的影响及其作用机制。方法应用逆转录实时定量PCR检测膀胱肿瘤新鲜组织中miR199a3p及CDK7的表达水平,并对二者的表达进行相关分析。逆转录实时定量PCR验证转染体系的有效性;增殖实验明确miR-199a-3P对膀胱肿瘤细胞的影响;荧光素酶报告系统证实miR-199a-3p对CDK73’UTR的靶向作用;免疫印迹实验验证miR199a3P对CDK7蛋白水平的影响;最后行功能回复实验。结果膀胱肿瘤新鲜组织中miR-199a-3p的表达较正常对照明显降低,CDK7的表达则明显增加,两者呈负相关关系;miR-199a-3P类似物和抑制剂转染成功后能明显上调或下调miR-199a-3P的表达;miR-199a-3P可以明显抑制膀胱肿瘤细胞的增殖,而miR-199a-3p抑制剂可以促进其增殖;荧光素酶报告系统证实miR-199a-3P与CDK7的3’UTR靶向结合,同时miR-199a-3P可以明显抑制膀胱肿瘤细胞CDK7的表达;CDK7可以回复或者部分回复miR-199a-3P对膀胱肿瘤细胞的增殖抑制作用。结论microRNA-199a-3p可通过靶标基因CDK7实现其对膀胱肿瘤细胞的增殖抑制作用。
简介:摘要目的观察微小RNA(microRNA,miR)-27b-3p与干扰素调节因子4(IRF4)的靶向关系,分析其对结肠癌细胞B细胞淋巴瘤分子-6(bcl-6)表达的影响。方法2015年12月至2017年1月在南昌大学第二附属医院确诊为结肠癌患者共53例,以肿瘤组织作为研究组,以正常结肠黏膜组织作为对照组。应用实时荧光定量聚合酶链反应(qPCR)检测miR-27b-3p的表达。应用免疫组织化学法检测结肠癌中干扰素调节因子4(IRF4)和B细胞淋巴瘤-6(bcl-6)的表达。选择人结肠癌细胞系116,构建阴性对照组、miR-27b-3p转染组、miR-27b-3p和IRF4共转染组,应用免疫印迹实验检测各组中IRF4和bcl-6的表达。应用双荧光素酶报告基因实验观察miR-27b-3p与IRF4的结合情况。组间比较采用t检验、配对t检验及方差分析。结果结肠癌中miR-27b-3p的表达(2.67±0.40)明显低于对照组(3.68±0.45,t=6.180,P<0.01),miR-27b-3p的表达在不同肿瘤最大径(≥5 cm为2.49±0.39,<5 cm为2.87±0.36)、浸润深度(浆膜及以外为2.44±0.34,未及浆膜为2.88±0.36)、脉管癌栓(有癌栓为2.28±0.42,无癌栓为2.77±0.31)、片状坏死(有坏死为2.36±0.42,无坏死为2.79±0.39)和淋巴结转移(有转移为2.37±0.41,无转移为2.81±0.22)分组的表达中差异有统计学意义(t=4.250、5.180、5.690、5.110、5.190,P值均<0.05)。miR-27b-3p与生存时间有关(χ2=5.080,P<0.05),差异有统计学意义。miR-27b-3p与IRF4(r=-0.600,P<0.05)、miR-27b-3p与bcl-6(r=-0.690,P<0.05)均呈负相关性。双荧光素酶报告基因实验显示miR-27b-3p与IRF4具有靶向关系。miR-27b-3p转染组中IRF4和bcl-6的表达低于阴性对照组(t=3.240、4.330,P<0.05),差异有统计学意义,共转染组能逆转上述改变。结论miR-27b-3p靶向负调控IRF4调节结肠癌细胞bcl-6的表达,miR-27b-3p低表达是肿瘤形成和进展的重要事件,检测miR-27b-3p的表达可能与生存时间有关。
简介:目的:主要是探讨Galectin-3蛋白及P27蛋白在正常胃黏膜、不典型增生、早期胃癌进展期胃癌中的表达与临床病理特征的相关性。方法:采用免疫组织化学S-P法检测正常胃黏膜组(40例)、不典型增生组(45例)、早期胃癌组(35例)、进展期胃癌(50例)的Galectin-3、P27蛋白表达情况。结果:Galectin-3蛋白胃癌组织中阳性表达率为71.8%,在分化较高与分化较低的胃癌中的阳性率分别为72.6%和69.8%。结论:Galectin-3蛋白及P27蛋白在胃癌组织中的表达没有明显相关性,但能通过检测两者会大大提高早期胃癌早诊率,进一步提高患者生存率。
简介:AbstractBackground:MicroRNA-20a (miR-20a) is dysregulated in many types of malignancies, including human hepatocellular carcinoma (HCC), but its expression level and functional significance in HCC are still disputed. We aimed to study the role of miR-20a-5p in HCC and its downstream molecular mechanisms.Methods:We used real-time polymerase chain reaction to detect the expression of miR-20a-5p and runt-related transcription factor 3 (RUNX3) in HCC and paraneoplastic tissue, transfected Huh7 and highly metastatic human hepatocellular carcinoma (MHCC97H) cells. A live cell workstation was used to observe the proliferation and migration of transfected cells. The invasiveness of transfected cells was verified by Transwell assay. Cell apoptosis was detected by flow cytometry. The expression levels of proteins after transfection were measured using simple western immunoblot measurements. Gene expression profiles between HCC and normal samples were obtained from The Cancer Genome Atlas. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment results were processed by the database for annotation, visualization and integrated discovery. Potential target genes of miR-20a-5p were predicted to further investigate how miR-20a-5p regulates epithelial-mesenchymal transition (EMT) in HCC.Results:MiR-20a-5p was significantly highly expressed in HCC tissues, and overexpression of miR-20a-5p significantly promoted HCC cell proliferation, migration, and invasion and inhibited apoptosis in vitro. The protein expression of E-cadherin was decreased and that of vimentin was increased after overexpression of miR-20a-5p in HCC cells. We discovered the intersection of genes from miRDB, miR TarBase, and TargetScan, obtained 397 target genes and finally focused on RUNX3. RUNX3 was not only reduced in HCC specimens but also drastically reduced in HCC cells overexpressing miR-20a-5p. RUNX3 expression decreased with elevated miR-20a-5p, which activated downstream EMT signaling and promoted cell proliferation, migration, and invasion.Conclusions:Since RUNX3 is involved in EMT in HCC, as proven by previous research, our findings provide further evidence for a novel regulatory pathway comprising the miR-20a/RUNX3/EMT axis that upregulates EMT signaling and enhances the migration of HCC cells.
简介:摘要目的探讨学龄期儿童认知功能事件相关电位(event-related potentials,ERPs)P300的发展特征。方法180例7~12岁学龄期儿童按年龄分为7~8岁组(n=48)、9~10岁组(n=44)和11~12岁组(n=48),并进行Oddball任务检测,采用SPSS 21.0软件对行为学结果及P300的亚成分P3a、P3b波幅、潜伏期进行分析。结果(1)7~8岁组、9~10岁组、11~12岁组儿童击中数[49(47.25,50)个,50(49,50)个,50(50,50)个]、正确反应时[(533.37±56.94) ms,(486.91±61.12)ms,(411.55±51.97) ms]、虚报数[2(1,4)个,2(1,3)个,1(0,2)个]差异均有统计学意义(F值/χ2=20.635,54.477,13.169,均P<0.01)。(2)P3a波幅的年龄主效应(F=3.884,P=0.023)、年龄×刺激类型交互效应(F=3.314,P=0.038)显著,刺激类型主效应不显著(F=0.111,P=0.740)。11~12岁组靶P3a波幅[(11.02±6.00)μV]较7~8岁组[(7.36±4.48)μV]与9~10岁组[(7.76±5.17)μV]增高,差异有统计学意义(均P<0.05)。而P3a潜伏期、P3b波幅与潜伏期分组×条件交互效应均不显著(P>0.05)。结论P3a可能是学龄期儿童认知功能的敏感监测指标,11~12岁是儿童注意定向、选择能力发展的关键时期,可能与脑网络发育程度有关。
简介:摘要目的探讨微小RNA-23b-3p(miR-23b-3p)对高糖诱导的人晶状体上皮细胞自噬和凋亡的调控作用。方法纳入2019年9月至2020年10月在西安医学院第一附属医院眼科收治的糖尿病性白内障(DC)患者30例为DC组,同期就诊的单纯白内障患者30例为单纯白内障组。2个组均行常规晶状体超声乳化及人工晶状体植入术,术中收集晶状体前囊膜组织。实时荧光定量PCR检测各组晶状体前囊膜组织中miR-23b-3p表达。体外培养人晶状体上皮细胞系HLEB3细胞,将其分为正常对照组、高糖组,分别于正常和高糖培养基中培养。根据生物信息学数据库预测原钙黏附蛋白17(PCDH17)与miR-23b-3p的靶向关系,双荧光素酶报告基因实验验证两者的靶向关系;取高糖培养的HLEB3细胞,分为miR-23b-3p拟似物组、阴性对照(NC)拟似物组、NC-siRNA组、PCDH17-siRNA组、miR-23b-3p拟似物+Vector组、miR-23b-3p拟似物+pcDNA-PCDH17组,分别转染相应试剂后实时荧光定量PCR法检测miR-23b-3p和PCDH17 mRNA表达;Western blot法检测哺乳动物ATG6同源蛋白(Beclin-1)、微管相关蛋白1轻链3(LC3B)、c-Jun氨基末端激酶(JNK)、磷酸化(p-)JNK、c-Jun、p-c-Jun、B淋巴细胞瘤基因-2相关X蛋白(Bax)、B淋巴细胞瘤基因-2蛋白(Bcl-2)蛋白的表达;流式细胞术检测细胞凋亡率。结果DC组晶状体前囊膜组织中miR-23b-3p相对表达量为0.35±0.15,明显低于单纯白内障组的1.00±0.09,差异有统计学意义(t=44.627,P<0.01);正常对照组、高糖组、高糖+NC拟似物组、高糖+miR-23b-3p拟似物组细胞中miR-23b-3p,LC3B Ⅱ/Ⅰ、Beclin-1、Bcl-2、Bax蛋白相对表达量以及细胞凋亡率总体比较,差异均有统计学意义(F=21.325、28.318、17.634、15.482、22.325、26.537,均P<0.01);其中与正常对照组比较,高糖组细胞凋亡率、LC3B Ⅱ/Ⅰ、Beclin-1、Bax蛋白表达量显著升高,Bcl-2蛋白表达量下降,与NC拟似物组比较,miR-23b-3p拟似物组细胞凋亡率、LC3B Ⅱ/Ⅰ、Beclin-1、Bax蛋白表达量显著下降,Bcl-2蛋白表达量显著升高,差异均有统计学意义(均P<0.05);生物信息学和双荧光素酶报告基因实验结果显示,PCDH17是miR-23b-3p的靶基因,miR-23b-3p拟似物组中PCDH17 mRNA相对表达量较NC拟似物组显著降低(P<0.05)。与NC-siRNA组相比,PCDH17-siRNA组细胞凋亡率、LC3B-Ⅱ/Ⅰ、Beclin-1以及Bax蛋白表达量显著下降,Bcl-2蛋白表达量显著升高,差异均有统计学意义(t=9.116、12.413、5.349、3.273、8.419,均P<0.01)。NC拟似物组、miR-23b-3p拟似物组、miR-23b-3p拟似物+Vector组、miR-23b-3p拟似物+pcDNA-PCDH17组细胞中p-JNK/JNK、p-c-Jun/c-Jun、LC3B Ⅱ/Ⅰ、Beclin-1、Bcl-2、Bax蛋白相对表达量总体比较,差异均有统计学意义(F=24.724、19.319、23.418、17.562、20.263、15.249,均P<0.05);其中与miR-23b-3p拟似物+Vector组比较,miR-23b-3p拟似物+pcDNA-PCDH17组细胞中p-JNK/JNK、p-c-Jun/c-Jun、LC3B Ⅱ/Ⅰ、Beclin-1以及Bax蛋白表达量显著升高,Bcl-2蛋白表达量降低,差异均有统计学意义(均P<0.05)。结论miR-23b-3p对高糖环境下HLEB3细胞具有保护作用,其机制主要是通过靶向PCDH17调控JNK信号通路抑制高糖诱导HLEB3细胞的自噬和凋亡。
简介:摘要目的探讨AP患者血清miR-148a-3p和miR-551b-5p的表达水平及其临床价值。方法选取2017年1月至2020年9月间儋州市人民医院收治的152例AP患者的临床资料,根据病情严重程度将患者分为MAP组(70例)、MSAP组(40例)和SAP组(42例),SAP组又根据患者预后情况分成生存组(25例)和死亡组(17例)。另选取50例体检健康者作为对照组。于患者发病当天采集空腹静脉血,采用实时定量PCR法检测各组血清miR-148a-3p和miR-551b-5p表达水平。绘制受试者工作特征曲线(ROC),计算曲线下面积(AUC),分析血清miR-148a-3p和miR-551b-5p表达水平对SAP预后判断的价值。采用Pearson法分析SAP患者血清miR-148a-3p与miR-551b-5p表达水平的相关性。结果AP组患者血清miR-148a-3p和miR-551b-5p表达水平均明显高于对照组(3.18±1.27比0.96±0.28,1.94±0.85比0.51±0.12,P值均<0.001)。SAP组血清miR-148a-3p及miR-551b-5p表达水平均明显高于MSAP组、MAP组(4.36±1.70比2.84±1.10、2.50±0.92,2.80±1.04比1.68±0.53、1.42±0.45,P值均<0.001)。死亡组血清miR-148a-3p及miR-551b-5p表达水平均明显高于生存组(5.30±1.95比3.47±1.40,3.62±1.37比2.08±0.91,P值均<0.001)。ROC曲线分析显示,miR-148a-3p与miR-551b-5联合判断SAP预后的AUC值明显高于miR-148a-3p、miR-551b-5p单项指标[0.943(95%CI0.886~0.997)比0.860(95%CI0.797~0.924)、0.822(95%CI0.765~0.880)],其灵敏度为98.3%,特异度为84.6%。相关分析显示,SAP患者血清miR-148a-3p与miR-551b-5p表达水平呈正相关(r=0.835,P<0.001)。结论AP患者血清miR-148a-3p及miR-551b-5p表达水平明显升高,两者联合检测对判断SAP患者预后具有较好的价值。
简介:组蛋白甲基化是参予细胞的过程的一个多样的数组的重要epigenetic现象并且被发现了与癌症被联系。几的Recentidentification嘘一demethylases证明了那嘘一甲基化是一个可逆过程。通过一条候选人途径,我们化学上有简历作为H3K27demethylase识别了JMJD3。进HeLa房间的JMJD3的Transfection引起了整齐的乙醇H3K27的特定的减小,但是没在di-和单音的甲基H3K27上有效果,或嘘H3K4和H3K9上的一离氨酸methylations。Theenzymatic活动要求JmjC域和被建议了为余因子绑定重要的保存组氨酸。试管内生物化学的实验证明那JMJD3directly催化demethylation。另外,我们发现JMJD3起来在前列腺癌症,和它的表示调整了在变形前列腺癌症是更高的。因此,我们作为能够把整齐的乙醇组从移开的ademethylase识别了JMJD3嘘一H3离氨酸27并且起来在前列腺癌症调整了。