目的探讨miR-25-3p靶向解整合素金属蛋白酶10(ADAM10)调控Notch信号通路对P19细胞向心肌细胞分化的影响。方法采用二甲基亚砜(DMSO)诱导P19细胞向心肌细胞分化,分别收集诱导分化第0、5、10天的细胞,实时荧光定量PCR检测诱导分化过程中...目的探讨miR-25-3p靶向解整合素金属蛋白酶10(ADAM10)调控Notch信号通路对P19细胞向心肌细胞分化的影响。方法采用二甲基亚砜(DMSO)诱导P19细胞向心肌细胞分化,分别收集诱导分化第0、5、10天的细胞,实时荧光定量PCR检测诱导分化过程中心肌分化标志物GATA结合蛋白4(GATA4)、心肌肌钙蛋白T(cTnT)、心房利钠尿多肽(ANP)的mRNA以及miR-25-3p水平, Western blot法检测诱导分化过程中ADAM10蛋白水平。通过逆转录病毒感染P19细胞过表达miR-25-3p,采用实时荧光定量PCR检测感染后P19细胞中miR-25-3p水平, Western blot法检测感染后P19细胞ADAM10蛋白水平。生物信息学软件预测并通过荧光素酶报告实验验证miR-25-3p与ADAM10之间的靶向结合作用。感染后的P19细胞经DMSO诱导分化10d后,免疫荧光实验检测细胞中心肌肌钙蛋白I(cTnI)蛋白的表达情况,并计算心肌细胞分化率;Western blot法检测GATA4、cTnT、ANP以及Notch信号通路相关蛋白Notch1、Hes家族bHLH转录因子1(Hes1)、Hairy相关转录因子1(Hey1)和Hey2蛋白水平。结果P19细胞向心肌细胞诱导分化的第0、5、10天过程中, GATA4、cTnT、ANP的mRNA水平及ADAM10蛋白水平均逐渐增加,而miR-25-3p水平逐渐降低;逆转录病毒感染后, P19细胞中miR-25-3p水平显著增加,而ADAM10蛋白水平显著降低;生物信息学分析证实ADAM10为miR-25-3p的靶基因;诱导分化10 d后,过表达miR-25-3p可显著降低心肌细胞分化率,下调GATA4、cTnT、ANP及Notch信号通路相关分子Notch1、Hes1、Hey1和Hey2的蛋白水平。结论miR-25-3p可显著抑制P19细胞向心肌细胞分化,其机制可能与其靶向抑制ADAM10表达,进而抑制Notch信号通路的激活有关。展开更多
Objective:To investigate the effects of miR-25-3p on the occurrence,development and proliferation of tongue squamous cell carcinoma cells.Methods:To establish tongue squamous cell carcinoma cell line Tca8113 that stab...Objective:To investigate the effects of miR-25-3p on the occurrence,development and proliferation of tongue squamous cell carcinoma cells.Methods:To establish tongue squamous cell carcinoma cell line Tca8113 that stably and highly express miR-25-3p using recombinant reiroviral vector-mediated gene transfer method.The proliferation of transfected Tca8113 was detected by thiazolyl blue tetrazolium bromide(MTT)and cell colony formation assays.eyclnD1,p21^(cipt)and p27^(kipt)mRNA expressions in the transfected Tca-8113 were detected by quantitative PCR.cyclinD1,p21^(cipt),p27^(kipt),AKT,p-AKT,FOXOt and p-FOX01 expressions in the transfected Tca8113 were detected by western blot analysis.In addition,miR-25-3p expression in the tongue squamous cell carcinoma cell line and tissue specimen was also detected by quantitative PCR.Results:Quantitative PCR showed that mitt-25-3p expression in the tongue squamous cell carcinoma cell lines and tissue specimen was significantly lower than that in the adjacent tissue.MTT and cell colony formation assays showed that after miR-25-3p overexpression,the proliferation of transfected Tca8113 was obviously attenuated.Western blot analysis and quantitative PCR showed that after miR-25-3p overexpression.p21^(cipt)and p27^(kipt)expressions were upregulated,while cyclinD1,AKT,FOXO1 expressions were downregulated,and AKT and FOXO1 phosphorylation was inactivated in the transfected Tca8113 cells.Conclusions:MiR-25-3p inhibited the proliferation of tongue squamous cell carcinoma cells and regulated cell cycle-related protein expression,playing an important role in the occurrence and development of squamous cell carcinoma of the tongue.展开更多
目的研究微小RNA(microRNA,miRNA)miR-25-3p对心肌成纤维细胞纤维化表型的调控及机制。方法血管紧张素Ⅱ(AngⅡ)灌注小鼠构建心肌纤维化模型。用miRNA表达谱芯片检测纤维化的小鼠心肌中表达水平有差异的miRNA。原代分离法获得C57BL/6小...目的研究微小RNA(microRNA,miRNA)miR-25-3p对心肌成纤维细胞纤维化表型的调控及机制。方法血管紧张素Ⅱ(AngⅡ)灌注小鼠构建心肌纤维化模型。用miRNA表达谱芯片检测纤维化的小鼠心肌中表达水平有差异的miRNA。原代分离法获得C57BL/6小鼠心肌成纤维细胞(mCF),建立AngⅡ处理mCF的心肌纤维化细胞模型。mCF转染miR-25-3p mimic后检测纤维化相关基因的表达。双荧光素酶报告基因实验验证miR-25-3p与B细胞易位基因2(BTG2)的3′端非翻译区(3′UTR)的结合作用。放线菌素D实验验证BTG2对超氧化物歧化酶2(SOD2)稳定性的作用。结果miR-25-3p在AngⅡ灌注诱导的小鼠心肌和AngⅡ处理的mCF中表达升高。转染miR-25-3p mimic可使mCF中的Ⅰ型胶原α1(COL1A1)、Ⅲ型胶原α1(COL3A1)和α-平滑肌肌动蛋白(α-SMA)基因表达显著增加。双荧光素酶报告基因实验和功能实验证实BTG2是miR-25-3p的下游靶基因,并参与介导miR-25-3p促进mCF中纤维化相关基因表达的作用。机制研究证实BTG2可通过增加SOD2 m RNA的稳定性而上调其表达。结论miR-25-3p通过抑制BTG2的表达来下调SOD2的水平进而增强纤维化相关基因的表达,发挥促进心肌纤维化的作用。展开更多
文摘目的探讨miR-25-3p靶向解整合素金属蛋白酶10(ADAM10)调控Notch信号通路对P19细胞向心肌细胞分化的影响。方法采用二甲基亚砜(DMSO)诱导P19细胞向心肌细胞分化,分别收集诱导分化第0、5、10天的细胞,实时荧光定量PCR检测诱导分化过程中心肌分化标志物GATA结合蛋白4(GATA4)、心肌肌钙蛋白T(cTnT)、心房利钠尿多肽(ANP)的mRNA以及miR-25-3p水平, Western blot法检测诱导分化过程中ADAM10蛋白水平。通过逆转录病毒感染P19细胞过表达miR-25-3p,采用实时荧光定量PCR检测感染后P19细胞中miR-25-3p水平, Western blot法检测感染后P19细胞ADAM10蛋白水平。生物信息学软件预测并通过荧光素酶报告实验验证miR-25-3p与ADAM10之间的靶向结合作用。感染后的P19细胞经DMSO诱导分化10d后,免疫荧光实验检测细胞中心肌肌钙蛋白I(cTnI)蛋白的表达情况,并计算心肌细胞分化率;Western blot法检测GATA4、cTnT、ANP以及Notch信号通路相关蛋白Notch1、Hes家族bHLH转录因子1(Hes1)、Hairy相关转录因子1(Hey1)和Hey2蛋白水平。结果P19细胞向心肌细胞诱导分化的第0、5、10天过程中, GATA4、cTnT、ANP的mRNA水平及ADAM10蛋白水平均逐渐增加,而miR-25-3p水平逐渐降低;逆转录病毒感染后, P19细胞中miR-25-3p水平显著增加,而ADAM10蛋白水平显著降低;生物信息学分析证实ADAM10为miR-25-3p的靶基因;诱导分化10 d后,过表达miR-25-3p可显著降低心肌细胞分化率,下调GATA4、cTnT、ANP及Notch信号通路相关分子Notch1、Hes1、Hey1和Hey2的蛋白水平。结论miR-25-3p可显著抑制P19细胞向心肌细胞分化,其机制可能与其靶向抑制ADAM10表达,进而抑制Notch信号通路的激活有关。
基金Supported by Key Disciplines Group Construetion Project of Pudong Health Bureau of Shanghai(Grant No.PWZxk2010-12)
文摘Objective:To investigate the effects of miR-25-3p on the occurrence,development and proliferation of tongue squamous cell carcinoma cells.Methods:To establish tongue squamous cell carcinoma cell line Tca8113 that stably and highly express miR-25-3p using recombinant reiroviral vector-mediated gene transfer method.The proliferation of transfected Tca8113 was detected by thiazolyl blue tetrazolium bromide(MTT)and cell colony formation assays.eyclnD1,p21^(cipt)and p27^(kipt)mRNA expressions in the transfected Tca-8113 were detected by quantitative PCR.cyclinD1,p21^(cipt),p27^(kipt),AKT,p-AKT,FOXOt and p-FOX01 expressions in the transfected Tca8113 were detected by western blot analysis.In addition,miR-25-3p expression in the tongue squamous cell carcinoma cell line and tissue specimen was also detected by quantitative PCR.Results:Quantitative PCR showed that mitt-25-3p expression in the tongue squamous cell carcinoma cell lines and tissue specimen was significantly lower than that in the adjacent tissue.MTT and cell colony formation assays showed that after miR-25-3p overexpression,the proliferation of transfected Tca8113 was obviously attenuated.Western blot analysis and quantitative PCR showed that after miR-25-3p overexpression.p21^(cipt)and p27^(kipt)expressions were upregulated,while cyclinD1,AKT,FOXO1 expressions were downregulated,and AKT and FOXO1 phosphorylation was inactivated in the transfected Tca8113 cells.Conclusions:MiR-25-3p inhibited the proliferation of tongue squamous cell carcinoma cells and regulated cell cycle-related protein expression,playing an important role in the occurrence and development of squamous cell carcinoma of the tongue.
文摘目的研究微小RNA(microRNA,miRNA)miR-25-3p对心肌成纤维细胞纤维化表型的调控及机制。方法血管紧张素Ⅱ(AngⅡ)灌注小鼠构建心肌纤维化模型。用miRNA表达谱芯片检测纤维化的小鼠心肌中表达水平有差异的miRNA。原代分离法获得C57BL/6小鼠心肌成纤维细胞(mCF),建立AngⅡ处理mCF的心肌纤维化细胞模型。mCF转染miR-25-3p mimic后检测纤维化相关基因的表达。双荧光素酶报告基因实验验证miR-25-3p与B细胞易位基因2(BTG2)的3′端非翻译区(3′UTR)的结合作用。放线菌素D实验验证BTG2对超氧化物歧化酶2(SOD2)稳定性的作用。结果miR-25-3p在AngⅡ灌注诱导的小鼠心肌和AngⅡ处理的mCF中表达升高。转染miR-25-3p mimic可使mCF中的Ⅰ型胶原α1(COL1A1)、Ⅲ型胶原α1(COL3A1)和α-平滑肌肌动蛋白(α-SMA)基因表达显著增加。双荧光素酶报告基因实验和功能实验证实BTG2是miR-25-3p的下游靶基因,并参与介导miR-25-3p促进mCF中纤维化相关基因表达的作用。机制研究证实BTG2可通过增加SOD2 m RNA的稳定性而上调其表达。结论miR-25-3p通过抑制BTG2的表达来下调SOD2的水平进而增强纤维化相关基因的表达,发挥促进心肌纤维化的作用。
