目的检测膀胱癌中长链非编码RNA(long non-coding RNA,lncRNA)烟酰胺核苷酸转氢酶反义RNA1(nicotinamide nucleotide transhydrogenase antisense RNA 1,NNT-AS1)表达情况,研究其对膀胱癌细胞增殖、迁移、侵袭及肿瘤干细胞干性的影响及...目的检测膀胱癌中长链非编码RNA(long non-coding RNA,lncRNA)烟酰胺核苷酸转氢酶反义RNA1(nicotinamide nucleotide transhydrogenase antisense RNA 1,NNT-AS1)表达情况,研究其对膀胱癌细胞增殖、迁移、侵袭及肿瘤干细胞干性的影响及可能分子机制。方法实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)法检测膀胱癌组织标本及细胞中LncRNA NNT-AS1表达情况;将膀胱癌细胞转染分为sh-NC组,sh-NNT-AS1组,sh-NNT-AS1+inh-582-5p组和sh-NNT-AS1+inh-582-5p+si-NCKAP1组。采用CCK-8法检测细胞增殖吸光度值(A值);Transwell实验检测细胞迁移、侵袭穿膜数;细胞成球实验检测干细胞干性。检索starBase和TargetScan数据库,并通过双荧光素酶报告基因实验预测验证LncRNA NNT-AS1和miR-582-5p,miR-582-5p与NCKAP1的靶向结合关系。Western blot检测膀胱癌干细胞标志蛋白(CD44,ALDH1A1,Oct4,Nanog)及Hippo-YAP/TAZ信号通路相关蛋白表达灰度值。结果与癌旁组织相比,膀胱癌组织中LncRNA NNT-AS1表达水平(0.34±0.07 vs 1.15±0.21)明显升高,差异有统计学意义(t=16.364,P<0.001)。与人正常膀胱上皮SV-HUC-1细胞(1.00±0.01)相比,膀胱癌细胞T24,5637,UM-UC-3和TCC-SUP中LncRNA NNT-AS1表达(6.03±0.17,4.66±0.36,5.47±0.26,3.02±0.20)明显升高,差异有统计学意义(t=17.472~51.160,均P<0.001)。与sh-NC组相比,在24,48和72 h时sh-NNT-AS1组细胞增值能力(A值)均显著降低(0.80±0.01 vs 1.07±0.06,1.18±0..07 vs 1.83±0.03,1.89±0.07 vs 2.53±0.06),差异有统计学意义(t=7.688,14.783,12.024,均P<0.05);sh-NNT-AS1组细胞迁移穿膜数(55.00±2.65个vs 354.30±7.84个)、细胞侵袭穿膜数(45.67±2.33个vs 303.00±9.07个)及膀胱癌干细胞成球数(20.85±2.17个vs 41.35±3.67个)显著降低,差异具有统计学意义(t=-62.641,-47.596,8.328,均P<0.001)。与sh-NC组相比,sh-NNT-AS1组细胞中CD44(0.04±0.01 vs 1.12±0.02),ALDH1A1(0.23±0.01 vs 1.16±0.05),Oct4(0.17±0.02 vs 1.10±0.04),Nanog(0.49±0.03 vs 1.24±0.03)的蛋白表达灰度值显著降低,差异具有统计学意义(t=83.656,31.591,36.019,30.619,均P<0.001)。与si-NC组相比,sh-NNT-AS1组CD44+CD133+细胞比例(9.30%±0.79%vs 88.50%±2.77%)明显降低,差异有统计学意义(t=-47.624,P<0.001)。双荧光素酶报告基因检测结果显示miR-582-5p为LncRNANNT-AS1靶基因,NCKAP1为miR-582-5p靶基因;LncRNA NNT-AS1靶向调控miR-582-5p/NCKAP1轴。与sh-NNT-AS1组相比,在24,48,72 h时sh-NNT-AS1+inh-582-5p组细胞增值能力(A值)均明显升高(0.98±0.03 vs 0.73±0.06,1.74±0.04 vs 1.22±0.05,2.33±0.16 vs 1.69±0.14),差异有统计学意义(t=5.977~11.628,均P<0.001)。与sh-NNT-AS1+inh-582-5p组相比,在24,48,72 h时sh-NNT-AS1+inh-582-5p+si-NCKAP1组细胞增值能力(A值)显著降低(0.69±0.04,1.01±0.07,1.39±0.08),差异有统计学意义(t=7.877~16.323,均P<0.001)。与sh-NNT-AS1组相比,sh-NNT-AS1+inh-582-5p组细胞迁移穿膜数(322.31±28.45个vs 81.42±13.22个)、细胞侵袭穿膜数(316.07±30.21个vs 92.13±12.65个)及膀胱癌干细胞成球数(38.55±2.20个vs 18.98±1.16个)显著增加,差异具有统计学意义(t=15.115,13.158,14.592,均P<0.001)。与sh-NNT-AS1组相比,sh-NNT-AS1+inh-582-5p组细胞CD44(1.05±0.08 vs 0.10±0.01),ALDH1A1(1.20±0.16 vs 0.22±0.02),Oct4(1.32±0.14 vs 0.19±0.03),Nanog(0.97±0.12 vs 0.15±0.04),YAP(1.29±0.11 vs 0.42±0.07)和TAZ(1.41±0.16 vs 0.35±0.05)蛋白表达灰度值均显著增加,差异具有统计学意义(t=10.650~21.243,均P<0.001)。与sh-NNT-AS1+inh-582-5p组相比,sh-NNT-AS1+inh-582-5p+si-NCKAP1组细胞迁移穿膜数(65.33±12.60个)、细胞侵袭穿膜数(71.08±15.19个)、膀胱癌干细胞成球数(11.36±1.05个)均显著降低,差异具有统计学意义(t=16.125,14.395,21.365,均P<0.001)。与sh-NNT-AS1+inh-582-5p组相比,sh-NNT-AS1+inh-582-5p+si-NCKAP1组细胞CD44(0.25±0.05),ALDH1A1(0.61±0.11),Oct4(0.22±0.08),Nanog(0.44±0.07),YAP(0.25±0.09)和TAZ(0.30±0.04)蛋白表达灰度值显著降低,差异具有统计学意义(t=6.412~17.889,均P<0.001)。结论膀胱癌中LncRNA NNT-AS1表达上调,其对膀胱癌细胞增殖、侵袭及肿瘤干细胞干性的影响,可能是通过调控miR-582-5p/NCKAP1分子轴,激活Hippo-YAP/TAZ信号通路完成。展开更多
以霉菌几丁质合酶Ⅲ保守序列作为靶序列设计引物,合成分子信标探针;以黑曲霉菌ATCC(16404)DNA为模板,通过PCR、分子克隆、转录构建靶标RNA,进而建立实时荧光核酸恒温扩增技术(simultaneous amplification and testing,SAT),并对体系内...以霉菌几丁质合酶Ⅲ保守序列作为靶序列设计引物,合成分子信标探针;以黑曲霉菌ATCC(16404)DNA为模板,通过PCR、分子克隆、转录构建靶标RNA,进而建立实时荧光核酸恒温扩增技术(simultaneous amplification and testing,SAT),并对体系内相应成分进行优化;最后利用优化的SAT体系检测食品污染中常见的病原微生物,评价SAT方法的特异性;针对不同浓度的黑曲霉菌孢子悬液,提取RNA进行SAT检测,评价SAT方法的灵敏性。结果表明,SAT检测体系中引物浓度为10μmol·L^-1及探针浓度为10μmol·L^-1时,反应曲线最佳;扩增过程中累计荧光量达到设定的荧光阈值所需循环数与培养的黑曲霉菌孢子量的对数存在线性相关关系(y=-7.061x+59.567,R^2=0.961 1),该方法的灵敏度为10^3个·mL^-1孢子,用该方法检测食品中常见污染菌,发现仅黑曲霉菌出现荧光信号。初步建立了黑曲霉菌的SAT检测体系,可与食品常见污染细菌相鉴别,特异性达100%,进一步提高灵敏度后,可成为食品中黑曲霉菌检测的新方法。展开更多
AIM:To evaluate the effect of RNA interference (RNAi) mediated silence of signal transduction and activation of transcription (STAT)3 on the growth of human pancreatic cancer cells both in vitro and in vivo.METHODS:ST...AIM:To evaluate the effect of RNA interference (RNAi) mediated silence of signal transduction and activation of transcription (STAT)3 on the growth of human pancreatic cancer cells both in vitro and in vivo.METHODS:STAT3 specific shRNA was used to silence the expression of STAT3 in pancreatic cancer cell line SW1990.The anti-growth effects of RNAi against STAT3 were studied in vitro and in experimental cancer xenografts in nude mice.The potential pathways involved in STAT3 signaling were detected using reverse transcription polymerase chain reaction and western blotting.RESULTS:The expression of the STAT3 was inhibited using RNAi in SW1990 cells.RNAi against STAT3 inhibited cell proliferation,induced cell apoptosis and significantly reduced the levels of CyclinD1 and Bcl-xL when compared with parental and control vector-transfected cells.In vivo experiments showed that RNAi against STAT3 inhibited the tumorigenicity of SW1990 cells and significantly suppressed tumor growth when it was directly injected into tumors.CONCLUSION:STAT3 signaling pathway plays an important role in the progression of pancreatic cancer,and silence of STAT3 gene using RNAi technique may be a novel therapeutic option for treatment of pancreatic cancer.展开更多
文摘目的检测膀胱癌中长链非编码RNA(long non-coding RNA,lncRNA)烟酰胺核苷酸转氢酶反义RNA1(nicotinamide nucleotide transhydrogenase antisense RNA 1,NNT-AS1)表达情况,研究其对膀胱癌细胞增殖、迁移、侵袭及肿瘤干细胞干性的影响及可能分子机制。方法实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)法检测膀胱癌组织标本及细胞中LncRNA NNT-AS1表达情况;将膀胱癌细胞转染分为sh-NC组,sh-NNT-AS1组,sh-NNT-AS1+inh-582-5p组和sh-NNT-AS1+inh-582-5p+si-NCKAP1组。采用CCK-8法检测细胞增殖吸光度值(A值);Transwell实验检测细胞迁移、侵袭穿膜数;细胞成球实验检测干细胞干性。检索starBase和TargetScan数据库,并通过双荧光素酶报告基因实验预测验证LncRNA NNT-AS1和miR-582-5p,miR-582-5p与NCKAP1的靶向结合关系。Western blot检测膀胱癌干细胞标志蛋白(CD44,ALDH1A1,Oct4,Nanog)及Hippo-YAP/TAZ信号通路相关蛋白表达灰度值。结果与癌旁组织相比,膀胱癌组织中LncRNA NNT-AS1表达水平(0.34±0.07 vs 1.15±0.21)明显升高,差异有统计学意义(t=16.364,P<0.001)。与人正常膀胱上皮SV-HUC-1细胞(1.00±0.01)相比,膀胱癌细胞T24,5637,UM-UC-3和TCC-SUP中LncRNA NNT-AS1表达(6.03±0.17,4.66±0.36,5.47±0.26,3.02±0.20)明显升高,差异有统计学意义(t=17.472~51.160,均P<0.001)。与sh-NC组相比,在24,48和72 h时sh-NNT-AS1组细胞增值能力(A值)均显著降低(0.80±0.01 vs 1.07±0.06,1.18±0..07 vs 1.83±0.03,1.89±0.07 vs 2.53±0.06),差异有统计学意义(t=7.688,14.783,12.024,均P<0.05);sh-NNT-AS1组细胞迁移穿膜数(55.00±2.65个vs 354.30±7.84个)、细胞侵袭穿膜数(45.67±2.33个vs 303.00±9.07个)及膀胱癌干细胞成球数(20.85±2.17个vs 41.35±3.67个)显著降低,差异具有统计学意义(t=-62.641,-47.596,8.328,均P<0.001)。与sh-NC组相比,sh-NNT-AS1组细胞中CD44(0.04±0.01 vs 1.12±0.02),ALDH1A1(0.23±0.01 vs 1.16±0.05),Oct4(0.17±0.02 vs 1.10±0.04),Nanog(0.49±0.03 vs 1.24±0.03)的蛋白表达灰度值显著降低,差异具有统计学意义(t=83.656,31.591,36.019,30.619,均P<0.001)。与si-NC组相比,sh-NNT-AS1组CD44+CD133+细胞比例(9.30%±0.79%vs 88.50%±2.77%)明显降低,差异有统计学意义(t=-47.624,P<0.001)。双荧光素酶报告基因检测结果显示miR-582-5p为LncRNANNT-AS1靶基因,NCKAP1为miR-582-5p靶基因;LncRNA NNT-AS1靶向调控miR-582-5p/NCKAP1轴。与sh-NNT-AS1组相比,在24,48,72 h时sh-NNT-AS1+inh-582-5p组细胞增值能力(A值)均明显升高(0.98±0.03 vs 0.73±0.06,1.74±0.04 vs 1.22±0.05,2.33±0.16 vs 1.69±0.14),差异有统计学意义(t=5.977~11.628,均P<0.001)。与sh-NNT-AS1+inh-582-5p组相比,在24,48,72 h时sh-NNT-AS1+inh-582-5p+si-NCKAP1组细胞增值能力(A值)显著降低(0.69±0.04,1.01±0.07,1.39±0.08),差异有统计学意义(t=7.877~16.323,均P<0.001)。与sh-NNT-AS1组相比,sh-NNT-AS1+inh-582-5p组细胞迁移穿膜数(322.31±28.45个vs 81.42±13.22个)、细胞侵袭穿膜数(316.07±30.21个vs 92.13±12.65个)及膀胱癌干细胞成球数(38.55±2.20个vs 18.98±1.16个)显著增加,差异具有统计学意义(t=15.115,13.158,14.592,均P<0.001)。与sh-NNT-AS1组相比,sh-NNT-AS1+inh-582-5p组细胞CD44(1.05±0.08 vs 0.10±0.01),ALDH1A1(1.20±0.16 vs 0.22±0.02),Oct4(1.32±0.14 vs 0.19±0.03),Nanog(0.97±0.12 vs 0.15±0.04),YAP(1.29±0.11 vs 0.42±0.07)和TAZ(1.41±0.16 vs 0.35±0.05)蛋白表达灰度值均显著增加,差异具有统计学意义(t=10.650~21.243,均P<0.001)。与sh-NNT-AS1+inh-582-5p组相比,sh-NNT-AS1+inh-582-5p+si-NCKAP1组细胞迁移穿膜数(65.33±12.60个)、细胞侵袭穿膜数(71.08±15.19个)、膀胱癌干细胞成球数(11.36±1.05个)均显著降低,差异具有统计学意义(t=16.125,14.395,21.365,均P<0.001)。与sh-NNT-AS1+inh-582-5p组相比,sh-NNT-AS1+inh-582-5p+si-NCKAP1组细胞CD44(0.25±0.05),ALDH1A1(0.61±0.11),Oct4(0.22±0.08),Nanog(0.44±0.07),YAP(0.25±0.09)和TAZ(0.30±0.04)蛋白表达灰度值显著降低,差异具有统计学意义(t=6.412~17.889,均P<0.001)。结论膀胱癌中LncRNA NNT-AS1表达上调,其对膀胱癌细胞增殖、侵袭及肿瘤干细胞干性的影响,可能是通过调控miR-582-5p/NCKAP1分子轴,激活Hippo-YAP/TAZ信号通路完成。
文摘以霉菌几丁质合酶Ⅲ保守序列作为靶序列设计引物,合成分子信标探针;以黑曲霉菌ATCC(16404)DNA为模板,通过PCR、分子克隆、转录构建靶标RNA,进而建立实时荧光核酸恒温扩增技术(simultaneous amplification and testing,SAT),并对体系内相应成分进行优化;最后利用优化的SAT体系检测食品污染中常见的病原微生物,评价SAT方法的特异性;针对不同浓度的黑曲霉菌孢子悬液,提取RNA进行SAT检测,评价SAT方法的灵敏性。结果表明,SAT检测体系中引物浓度为10μmol·L^-1及探针浓度为10μmol·L^-1时,反应曲线最佳;扩增过程中累计荧光量达到设定的荧光阈值所需循环数与培养的黑曲霉菌孢子量的对数存在线性相关关系(y=-7.061x+59.567,R^2=0.961 1),该方法的灵敏度为10^3个·mL^-1孢子,用该方法检测食品中常见污染菌,发现仅黑曲霉菌出现荧光信号。初步建立了黑曲霉菌的SAT检测体系,可与食品常见污染细菌相鉴别,特异性达100%,进一步提高灵敏度后,可成为食品中黑曲霉菌检测的新方法。
基金Supported by A Grant from the Science and Technology Commission of Shanghai Municipality,No. 09QA1404600a grant from the Affiliated First People’s Hospital of ShanghaiJiao Tong University,No. 0801
文摘AIM:To evaluate the effect of RNA interference (RNAi) mediated silence of signal transduction and activation of transcription (STAT)3 on the growth of human pancreatic cancer cells both in vitro and in vivo.METHODS:STAT3 specific shRNA was used to silence the expression of STAT3 in pancreatic cancer cell line SW1990.The anti-growth effects of RNAi against STAT3 were studied in vitro and in experimental cancer xenografts in nude mice.The potential pathways involved in STAT3 signaling were detected using reverse transcription polymerase chain reaction and western blotting.RESULTS:The expression of the STAT3 was inhibited using RNAi in SW1990 cells.RNAi against STAT3 inhibited cell proliferation,induced cell apoptosis and significantly reduced the levels of CyclinD1 and Bcl-xL when compared with parental and control vector-transfected cells.In vivo experiments showed that RNAi against STAT3 inhibited the tumorigenicity of SW1990 cells and significantly suppressed tumor growth when it was directly injected into tumors.CONCLUSION:STAT3 signaling pathway plays an important role in the progression of pancreatic cancer,and silence of STAT3 gene using RNAi technique may be a novel therapeutic option for treatment of pancreatic cancer.