Objective:Myocardial infarction(MI)remains the leading cause of morbidity and mortality due partly to the limited regenerative capacity of cardiomyocytes to replace cardiomyocyte lost due to apoptosis.Inhibiting cardi...Objective:Myocardial infarction(MI)remains the leading cause of morbidity and mortality due partly to the limited regenerative capacity of cardiomyocytes to replace cardiomyocyte lost due to apoptosis.Inhibiting cardiomyocyte apoptosis is recognized as an effective therapeutic approach for MI.MicroRNAs(miRNAs,miRs),which regulate target genes at the post-transcriptional level,play a significant role in the regulation of cardiovascular diseases such as MI.MicroRNA-135b(miR-135b)has a protective effect on cardiomyocytes.However,the role of miR-135b in cardiomyocyte apoptosis in infarct myocardium needs further clarification.Methods:We generatedα-MHC-miR-135b transgenic mice to investigate the role of miR-135b in myocardial injury after MI.MiR-135b mimic and negative control(NC)were transfected into H2O2-induced cardiomyocytes to evaluate the effect of overexpression of miR-135b on the levels of reactive oxygen species(ROS)and apoptosis.Results:Our results showed that overexpression of miR-135b had protective effect on cardiomyocyte injury both in vivo and in vitro.MiR-135b inhibited cardiomyocyte apoptosis and ROS generation,downregulated pro-apoptosis proteins(cleaved-caspase-3 and Bax),and increased anti-apoptosis protein(Bcl-2).Moreover,miR-135b showed an inhibitory effect on apoptosis-related protein target transient receptor potential vanilloid-type 4(TRPV4)cation channel.Conclusion:MiR-135b might be considered a new molecular target for potential replacement therapy as antiapoptotic cardioprotection in the setting of MI.展开更多
AIM:To determine the in vitro protective effect of recombinant prominin-1(Prominin-1)+microRNA-29b(P1M29)on N-methyl-D-aspartate(NMDA)-induced excitotoxicity in retinal ganglion cells(RGCs).METHODS:RGC-5 cells were cu...AIM:To determine the in vitro protective effect of recombinant prominin-1(Prominin-1)+microRNA-29b(P1M29)on N-methyl-D-aspartate(NMDA)-induced excitotoxicity in retinal ganglion cells(RGCs).METHODS:RGC-5 cells were cultured,and NMDAinduced excitotoxicity at the range of 100–800μmol/L was assessed using the MTT assay.NMDA(800μmol/L)was selected as the appropriate concentration for preparing the cell model.To evaluate the protective effect of P1M29 on the cell model,Prominin-1 was added at the concentration of 1–6 ng/mL for 48h,and the cell survival was investigated with/without microRNA-29b.After obtaining the appropriate concentration and time of P1M29 at 48h,real-time polymerase chain reaction(PCR)was utilized to detect the relative mRNA expression of vascular endothelial growth factor(VEGF)and transforming growth factor(TGF)-β2.Western blot detection was applied to measure the phosphorylation levels of protein kinase B(AKT)and extracellular regulated protein kinases(ERK)in RGC-5 cells after treatment with Prominin-1.Apoptosis study of the cell model was conducted by flow cytometry for estimating the anti-apoptotic effect of P1M29.Immunofluorescence analysis was used to analyze the expression levels of VEGF and TGF-β2.RESULTS:MTT cytotoxicity assays demonstrated that P1M29 group had significantly higher cell survival rate than Prominin-1 group(P<0.05).Real-time PCR data indicated that the expression levels of VEGF were significantly increased in both Prominin-1 and P1M29 groups compared NMDA and microRNA-29b group(P<0.05),while TGF-β2 were significantly decreased in both microRNA-29b and P1M29 groups compared NMDA and Prominin-1 group(P<0.05).Western blot results showed that both Prominin-1 and P1M29 groups significantly increased the phosphorylation levels of AKT and ERK compared to NMDA and microRNA-29b groups(P<0.05).Flow cytometry analysis revealed that P1M29 could prevent RGC-5 cell apoptosis in the early stage of apoptosis,while immunofluorescence results showed that P1M29 group had higher expression of VEGF and lower expression of TGF-β2 with a stronger green fluorescence than NMDA group.CONCLUSION:Prominin-1 combined with microRNA-29b can provide a suitable therapeutic option for ameliorating NMDA-induced excitotoxicity in RGC-5 cells.展开更多
目的 观察心房颤动(atrial fibrillation,AF)患者血清微小核糖核酸(micro RNA,miRNA,miR)-29b和miR-135b的表达变化,探讨二者表达与心房纤维化程度及射频消融术后复发的关系。方法 选取2019年7月~2022年7月于沧州市人民医院心血管内科...目的 观察心房颤动(atrial fibrillation,AF)患者血清微小核糖核酸(micro RNA,miRNA,miR)-29b和miR-135b的表达变化,探讨二者表达与心房纤维化程度及射频消融术后复发的关系。方法 选取2019年7月~2022年7月于沧州市人民医院心血管内科住院诊治并接受射频消融术治疗的AF患者(病例组,n=158)以及同期体检的健康者(对照组,n=126)。收集AF患者的一般临床资料及生化指标,采用实时荧光定量PCR法检测血清miR-29b和miR-135b相对表达水平。采用多因素Logistic回归分析AF患者术后复发的影响因素;绘制受试者工作特征(receiver operating characteristic,ROC)曲线分析血清miR-29b和miR-135b水平对AF患者术后复发的预测价值,曲线下面积(area under the curve,AUC)比较采用Z检验。结果 与对照组比较,病例组血清miR-29b(0.64±0.13 vs 1.04±0.24)和mi R-135b水平(0.45±0.08 vs 1.00±0.14)均降低,差异均有统计学意义(t=17.916,41.604,均P<0.05);与低纤维化组比较,高纤维化组血清miR-29b(0.51±0.11 vs 0.76±0.15)和miR-135b水平(0.34±0.07 vs 0.55±0.09)均降低,差异有统计学意义(t=11.896,16.314,均P<0.05)。与未复发组比较,复发组左心房内径(45.34±3.56 mm vs35.23±2.89 mm)和血清尿酸(uric acid,UA)水平(478.15±68.45μmol/L vs 421.75±61.76μmol/L)均升高,血清miR-29b(0.54±0.12 vs 0.72±0.14)和miR-135b水平(0.36±0.06 vs 0.53±0.10)均降低,差异有统计学意义(t=19.702,5.441,8.584,12.642,均P<0.05)。Logistic回归分析显示,左心房直径(OR=1.603,95%CI:1.054~2.439),UA(OR=1.527,95%CI:1.202~1.939),miR-29b(OR=0.657,95%CI:0.515~0.835)和miR-135b(OR=0.318,95%CI:0.141~0.719)水平是影响AF患者术后复发的影响因素(均P<0.05);血清miR-29b和miR-135b预测AF患者射频消融术后复发的AUC分别为0.843(95%CI:0.783~0.902),0.901(95%CI:0.852~0.949),最佳阈值分别为0.43和0.64,灵敏度分别为65.1%和80.2%,特异度分别为88.9%和91.7%,两者联合预测术后复发的AUC为0.947(95%CI:0.914~0.981),灵敏度和特异度分别为90.75%,83.1%。结论 血清miR-29b和miR-135b水平异常表达与AF患者心房纤维化程度及射频消融术后复发有关,二者联合预测AF患者术后复发具有一定的价值。展开更多
目的探究血清miR-135b和miR-145在未破裂颅内动脉瘤(unruptured intracranial aneurysm,UIA)患者中的表达水平及临床价值。方法选取2018年5月~2020年3月邯郸市第一医院神外三科收治的102例UIA患者作为研究组,另选同期健康体检者95例作...目的探究血清miR-135b和miR-145在未破裂颅内动脉瘤(unruptured intracranial aneurysm,UIA)患者中的表达水平及临床价值。方法选取2018年5月~2020年3月邯郸市第一医院神外三科收治的102例UIA患者作为研究组,另选同期健康体检者95例作为对照组,同时收集受试者一般资料进行比较。实时荧光聚合酶链反应(qRT-PCR)法检测血清中miR-135b和miR-145表达水平;ROC曲线分析血清miR-135b和miR-145对UIA的诊断价值;Logistic回归分析UIA形成的影响因素。结果研究组中高血压(62.75%)、高血脂(60.00%)、吸烟史(64.76%)、饮酒史(70.59%)患者所占比例高于对照组(46.72%,44.21%,47.37%,53.68%),差异均有统计学意义(χ^(2)=5.361,4.986,6.139,5.993,均P<0.05);研究组患者血清miR-135b(0.79±0.20)表达水平低于对照组(1.03±0.27),血清miR-145水平(1.28±0.24)高于对照组(0.99±0.22),差异均有统计学意义(t=7.122,8.821,均P<0.05);与动脉瘤个数为1及动脉瘤直径<7mm的患者相比,动脉瘤个数≥2及动脉瘤直径≥7mm的患者血清中miR-135b表达水平(0.68±0.18 vs 0.84±0.21,0.71±0.17mm vs 0.85±0.22mm)降低,miR-145水平(1.37±0.31mm vs 1.24±0.21mm,1.37±0.30mm vs 1.21±0.19mm)升高,差异均有统计学意义(t=2.472~3.689,均P<0.05);血清miR-135b,miR-145以及二者联合诊断UIA的曲线下面积(AUC)分别为0.788,0.836和0.907,二者联合的诊断效能优于其各自单独检测(Z=4.236,3.226,均P<0.05);Logistic回归分析结果显示,高血压(OR=1.326,95%CI=1.044~1.684)、吸烟史(OR=1.457,95%CI=1.077~1.970)、饮酒史(OR=1.879,95%CI=1.113~3.171)、血清miR-135b水平<0.94(OR=0.758,95%CI=0.612~0.939)、血清miR-145水平≥1.22(OR=1.433,95%CI=1.113~1.845)均是UIA的影响因素(均P<0.05)。结论UIA患者血清miR-135b水平下调,miR-145水平上调,二者与UIA的形成和发展存在相关性,且二者联合检测对UIA形成的诊断效能较高。展开更多
基金supported by CAMS Innovation Fund for Medical Sciences of China(2019-I2M-5-078)National Natural Science Foundation of China(Grant No.81861128022)Natural Science Foundation of Heilongjiang Province(Grant No.LH2019H003).
文摘Objective:Myocardial infarction(MI)remains the leading cause of morbidity and mortality due partly to the limited regenerative capacity of cardiomyocytes to replace cardiomyocyte lost due to apoptosis.Inhibiting cardiomyocyte apoptosis is recognized as an effective therapeutic approach for MI.MicroRNAs(miRNAs,miRs),which regulate target genes at the post-transcriptional level,play a significant role in the regulation of cardiovascular diseases such as MI.MicroRNA-135b(miR-135b)has a protective effect on cardiomyocytes.However,the role of miR-135b in cardiomyocyte apoptosis in infarct myocardium needs further clarification.Methods:We generatedα-MHC-miR-135b transgenic mice to investigate the role of miR-135b in myocardial injury after MI.MiR-135b mimic and negative control(NC)were transfected into H2O2-induced cardiomyocytes to evaluate the effect of overexpression of miR-135b on the levels of reactive oxygen species(ROS)and apoptosis.Results:Our results showed that overexpression of miR-135b had protective effect on cardiomyocyte injury both in vivo and in vitro.MiR-135b inhibited cardiomyocyte apoptosis and ROS generation,downregulated pro-apoptosis proteins(cleaved-caspase-3 and Bax),and increased anti-apoptosis protein(Bcl-2).Moreover,miR-135b showed an inhibitory effect on apoptosis-related protein target transient receptor potential vanilloid-type 4(TRPV4)cation channel.Conclusion:MiR-135b might be considered a new molecular target for potential replacement therapy as antiapoptotic cardioprotection in the setting of MI.
基金Supported by Zhejiang Provincial Natural Science Foundation of China(No.LY20H120003).
文摘AIM:To determine the in vitro protective effect of recombinant prominin-1(Prominin-1)+microRNA-29b(P1M29)on N-methyl-D-aspartate(NMDA)-induced excitotoxicity in retinal ganglion cells(RGCs).METHODS:RGC-5 cells were cultured,and NMDAinduced excitotoxicity at the range of 100–800μmol/L was assessed using the MTT assay.NMDA(800μmol/L)was selected as the appropriate concentration for preparing the cell model.To evaluate the protective effect of P1M29 on the cell model,Prominin-1 was added at the concentration of 1–6 ng/mL for 48h,and the cell survival was investigated with/without microRNA-29b.After obtaining the appropriate concentration and time of P1M29 at 48h,real-time polymerase chain reaction(PCR)was utilized to detect the relative mRNA expression of vascular endothelial growth factor(VEGF)and transforming growth factor(TGF)-β2.Western blot detection was applied to measure the phosphorylation levels of protein kinase B(AKT)and extracellular regulated protein kinases(ERK)in RGC-5 cells after treatment with Prominin-1.Apoptosis study of the cell model was conducted by flow cytometry for estimating the anti-apoptotic effect of P1M29.Immunofluorescence analysis was used to analyze the expression levels of VEGF and TGF-β2.RESULTS:MTT cytotoxicity assays demonstrated that P1M29 group had significantly higher cell survival rate than Prominin-1 group(P<0.05).Real-time PCR data indicated that the expression levels of VEGF were significantly increased in both Prominin-1 and P1M29 groups compared NMDA and microRNA-29b group(P<0.05),while TGF-β2 were significantly decreased in both microRNA-29b and P1M29 groups compared NMDA and Prominin-1 group(P<0.05).Western blot results showed that both Prominin-1 and P1M29 groups significantly increased the phosphorylation levels of AKT and ERK compared to NMDA and microRNA-29b groups(P<0.05).Flow cytometry analysis revealed that P1M29 could prevent RGC-5 cell apoptosis in the early stage of apoptosis,while immunofluorescence results showed that P1M29 group had higher expression of VEGF and lower expression of TGF-β2 with a stronger green fluorescence than NMDA group.CONCLUSION:Prominin-1 combined with microRNA-29b can provide a suitable therapeutic option for ameliorating NMDA-induced excitotoxicity in RGC-5 cells.
文摘目的 观察心房颤动(atrial fibrillation,AF)患者血清微小核糖核酸(micro RNA,miRNA,miR)-29b和miR-135b的表达变化,探讨二者表达与心房纤维化程度及射频消融术后复发的关系。方法 选取2019年7月~2022年7月于沧州市人民医院心血管内科住院诊治并接受射频消融术治疗的AF患者(病例组,n=158)以及同期体检的健康者(对照组,n=126)。收集AF患者的一般临床资料及生化指标,采用实时荧光定量PCR法检测血清miR-29b和miR-135b相对表达水平。采用多因素Logistic回归分析AF患者术后复发的影响因素;绘制受试者工作特征(receiver operating characteristic,ROC)曲线分析血清miR-29b和miR-135b水平对AF患者术后复发的预测价值,曲线下面积(area under the curve,AUC)比较采用Z检验。结果 与对照组比较,病例组血清miR-29b(0.64±0.13 vs 1.04±0.24)和mi R-135b水平(0.45±0.08 vs 1.00±0.14)均降低,差异均有统计学意义(t=17.916,41.604,均P<0.05);与低纤维化组比较,高纤维化组血清miR-29b(0.51±0.11 vs 0.76±0.15)和miR-135b水平(0.34±0.07 vs 0.55±0.09)均降低,差异有统计学意义(t=11.896,16.314,均P<0.05)。与未复发组比较,复发组左心房内径(45.34±3.56 mm vs35.23±2.89 mm)和血清尿酸(uric acid,UA)水平(478.15±68.45μmol/L vs 421.75±61.76μmol/L)均升高,血清miR-29b(0.54±0.12 vs 0.72±0.14)和miR-135b水平(0.36±0.06 vs 0.53±0.10)均降低,差异有统计学意义(t=19.702,5.441,8.584,12.642,均P<0.05)。Logistic回归分析显示,左心房直径(OR=1.603,95%CI:1.054~2.439),UA(OR=1.527,95%CI:1.202~1.939),miR-29b(OR=0.657,95%CI:0.515~0.835)和miR-135b(OR=0.318,95%CI:0.141~0.719)水平是影响AF患者术后复发的影响因素(均P<0.05);血清miR-29b和miR-135b预测AF患者射频消融术后复发的AUC分别为0.843(95%CI:0.783~0.902),0.901(95%CI:0.852~0.949),最佳阈值分别为0.43和0.64,灵敏度分别为65.1%和80.2%,特异度分别为88.9%和91.7%,两者联合预测术后复发的AUC为0.947(95%CI:0.914~0.981),灵敏度和特异度分别为90.75%,83.1%。结论 血清miR-29b和miR-135b水平异常表达与AF患者心房纤维化程度及射频消融术后复发有关,二者联合预测AF患者术后复发具有一定的价值。
文摘目的探究血清miR-135b和miR-145在未破裂颅内动脉瘤(unruptured intracranial aneurysm,UIA)患者中的表达水平及临床价值。方法选取2018年5月~2020年3月邯郸市第一医院神外三科收治的102例UIA患者作为研究组,另选同期健康体检者95例作为对照组,同时收集受试者一般资料进行比较。实时荧光聚合酶链反应(qRT-PCR)法检测血清中miR-135b和miR-145表达水平;ROC曲线分析血清miR-135b和miR-145对UIA的诊断价值;Logistic回归分析UIA形成的影响因素。结果研究组中高血压(62.75%)、高血脂(60.00%)、吸烟史(64.76%)、饮酒史(70.59%)患者所占比例高于对照组(46.72%,44.21%,47.37%,53.68%),差异均有统计学意义(χ^(2)=5.361,4.986,6.139,5.993,均P<0.05);研究组患者血清miR-135b(0.79±0.20)表达水平低于对照组(1.03±0.27),血清miR-145水平(1.28±0.24)高于对照组(0.99±0.22),差异均有统计学意义(t=7.122,8.821,均P<0.05);与动脉瘤个数为1及动脉瘤直径<7mm的患者相比,动脉瘤个数≥2及动脉瘤直径≥7mm的患者血清中miR-135b表达水平(0.68±0.18 vs 0.84±0.21,0.71±0.17mm vs 0.85±0.22mm)降低,miR-145水平(1.37±0.31mm vs 1.24±0.21mm,1.37±0.30mm vs 1.21±0.19mm)升高,差异均有统计学意义(t=2.472~3.689,均P<0.05);血清miR-135b,miR-145以及二者联合诊断UIA的曲线下面积(AUC)分别为0.788,0.836和0.907,二者联合的诊断效能优于其各自单独检测(Z=4.236,3.226,均P<0.05);Logistic回归分析结果显示,高血压(OR=1.326,95%CI=1.044~1.684)、吸烟史(OR=1.457,95%CI=1.077~1.970)、饮酒史(OR=1.879,95%CI=1.113~3.171)、血清miR-135b水平<0.94(OR=0.758,95%CI=0.612~0.939)、血清miR-145水平≥1.22(OR=1.433,95%CI=1.113~1.845)均是UIA的影响因素(均P<0.05)。结论UIA患者血清miR-135b水平下调,miR-145水平上调,二者与UIA的形成和发展存在相关性,且二者联合检测对UIA形成的诊断效能较高。
