BACKGROUND Diabetic kidney disease(DKD),characterized by increased urinary microalbumin levels and decreased renal function,is the primary cause of end-stage renal di-sease.Its pathological mechanisms are complicated ...BACKGROUND Diabetic kidney disease(DKD),characterized by increased urinary microalbumin levels and decreased renal function,is the primary cause of end-stage renal di-sease.Its pathological mechanisms are complicated and multifactorial;Therefore,sensitive and specific biomarkers are needed.Urinary exosome originate from diverse renal cells in nephron segments and partially mirror the pathological changes in the kidney.The microRNAs(miRNAs)in urinary exosome are remark-ably stable and highly tissue-specific for the kidney.METHODS Type 2 diabetic mellitus(T2DM)patients were recruited from the Second Hospital of Hebei Medical University and were divided into two groups:DM,diabetic pa-tients without albuminuria[urinary albumin to creatinine ratio(UACR)<30 mg/g]and DKD,diabetic patients with albuminuria(UACR≥30 mg/g).Healthy subjects were the normal control(NC)group.Urinary exosomal miR-145-5p,miR-27a-3p,and miR-29c-3p,were detected using real-time quantitative polymerase chain reaction.The correlation between exosomal miRNAs and the clinical in-dexes was evaluated.The diagnostic values of exosomal miR-145-5p and miR-27a-3p in DKD were determined using receiver operating characteristic(ROC)analysis.Biological functions of miR-145-5p were investigated by performing RESULTS Urinary exosomal expression of miR-145-5p and miR-27a-3p was more upregulated in the DKD group than in the DM group(miR-145-5p:4.54±1.45 vs 1.95±0.93,P<0.001;miR-27a-3p:2.33±0.79 vs 1.71±0.76,P<0.05)and the NC group(miR-145-5p:4.54±1.45 vs 1.55±0.83,P<0.001;miR-27a-3p:2.33±0.79 vs 1.10±0.51,P<0.001).The exosomal miR-145-5p and miR-27a-3p positively correlated with albuminuria and serum creatinine and negatively correlated with the estimated glomerular filtration rate.miR-27a-3p was also closely related to blood glucose,gly-cosylated hemoglobin A1c,and low-density lipoprotein cholesterol.ROC analysis revealed that miR-145-5p had a better area under the curve of 0.88[95%confidence interval(CI):0.784-0.985,P<0.0001]in diagnosing DKD than miR-27a-3p with 0.71(95%CI:0.547-0.871,P=0.0239).Bioinformatics analysis revealed that the target genes of miR-145-5p were located in the actin filament,cytoskeleton,and extracellular exosome and were involved in the pathological processes of DKD,including apoptosis,inflammation,and fibrosis.CONCLUSION Urinary exosomal miR-145-5p and miR-27a-3p may serve as novel noninvasive diagnostic biomarkers or promising therapeutic targets for DKD.展开更多
目的:探讨microRNA(miR)-145是否通过调控c-Myc参与肝癌行为的调控.方法:实时定量PCR检测肝组织及细胞系miR-145表达水平;检测不同肝组织c-Myc的mRNA和蛋白表达量;通过转染上调miR-145在HepG2细胞表达后,检测转染前后空白组、实验组、...目的:探讨microRNA(miR)-145是否通过调控c-Myc参与肝癌行为的调控.方法:实时定量PCR检测肝组织及细胞系miR-145表达水平;检测不同肝组织c-Myc的mRNA和蛋白表达量;通过转染上调miR-145在HepG2细胞表达后,检测转染前后空白组、实验组、阴性对照组HepG2中c-Myc的mRNA和蛋白表达量;应用流式细胞仪检测转染前后各组HepG2的凋亡情况.结果:miR-145mRNA在正常肝组织中表达明显高于癌旁和肝癌组织(0.878±0.146vs0.265±0.084,0.271±0.096,均P<0.05);癌旁和肝癌组织中miR-145mRNA的表达量差别无统计学意义.miR-145mRNA在LO-2中的表达明显高于HepG2(0.755±0.185vs0.471±0.074,P<0.05).c-Myc mRNA和蛋白在癌旁和肝癌中表达均高于正常肝组织(mRNA:0.136±0.071,0.451±0.026vs0.029±0.023;蛋白:0.301±0.022,0.445±0.018vs0.137±0.011,均P<0.05),且在肝癌组织中表达量较癌旁组织中明显升高(P<0.05).转染miR-145mim-i c s后空白组、实验组、阴性对照组c-M y cmRNA表达差异无统计学意义;而相对于空白组和阴性对照组,实验组c-Myc蛋白表达量表达明显下降(0.146±0.011vs0.366±0.014,0.350±0.013,均P<0.05),空白组和阴性对照组之间差异无统计学意义.流式细胞术检测发现,在HepG2中上调miR-145的表达后,细胞的凋亡明显增多,实验组与空白组和阴性对照组之间有明显差异(3.000±0.100vs1.167±0.153,0.933±0.208,均P<0.05).结论:miR-145反向调节c-Myc的表达;表达下调的miR-145丧失对c-Myc的抑制可能是肝癌发生的重要机制;miR-145能够作为抑癌基因促进细胞凋亡.展开更多
基金Supported by the Nature Science Foundation of Hebei Province,No.H2023104011.
文摘BACKGROUND Diabetic kidney disease(DKD),characterized by increased urinary microalbumin levels and decreased renal function,is the primary cause of end-stage renal di-sease.Its pathological mechanisms are complicated and multifactorial;Therefore,sensitive and specific biomarkers are needed.Urinary exosome originate from diverse renal cells in nephron segments and partially mirror the pathological changes in the kidney.The microRNAs(miRNAs)in urinary exosome are remark-ably stable and highly tissue-specific for the kidney.METHODS Type 2 diabetic mellitus(T2DM)patients were recruited from the Second Hospital of Hebei Medical University and were divided into two groups:DM,diabetic pa-tients without albuminuria[urinary albumin to creatinine ratio(UACR)<30 mg/g]and DKD,diabetic patients with albuminuria(UACR≥30 mg/g).Healthy subjects were the normal control(NC)group.Urinary exosomal miR-145-5p,miR-27a-3p,and miR-29c-3p,were detected using real-time quantitative polymerase chain reaction.The correlation between exosomal miRNAs and the clinical in-dexes was evaluated.The diagnostic values of exosomal miR-145-5p and miR-27a-3p in DKD were determined using receiver operating characteristic(ROC)analysis.Biological functions of miR-145-5p were investigated by performing RESULTS Urinary exosomal expression of miR-145-5p and miR-27a-3p was more upregulated in the DKD group than in the DM group(miR-145-5p:4.54±1.45 vs 1.95±0.93,P<0.001;miR-27a-3p:2.33±0.79 vs 1.71±0.76,P<0.05)and the NC group(miR-145-5p:4.54±1.45 vs 1.55±0.83,P<0.001;miR-27a-3p:2.33±0.79 vs 1.10±0.51,P<0.001).The exosomal miR-145-5p and miR-27a-3p positively correlated with albuminuria and serum creatinine and negatively correlated with the estimated glomerular filtration rate.miR-27a-3p was also closely related to blood glucose,gly-cosylated hemoglobin A1c,and low-density lipoprotein cholesterol.ROC analysis revealed that miR-145-5p had a better area under the curve of 0.88[95%confidence interval(CI):0.784-0.985,P<0.0001]in diagnosing DKD than miR-27a-3p with 0.71(95%CI:0.547-0.871,P=0.0239).Bioinformatics analysis revealed that the target genes of miR-145-5p were located in the actin filament,cytoskeleton,and extracellular exosome and were involved in the pathological processes of DKD,including apoptosis,inflammation,and fibrosis.CONCLUSION Urinary exosomal miR-145-5p and miR-27a-3p may serve as novel noninvasive diagnostic biomarkers or promising therapeutic targets for DKD.
文摘目的:探讨microRNA(miR)-145是否通过调控c-Myc参与肝癌行为的调控.方法:实时定量PCR检测肝组织及细胞系miR-145表达水平;检测不同肝组织c-Myc的mRNA和蛋白表达量;通过转染上调miR-145在HepG2细胞表达后,检测转染前后空白组、实验组、阴性对照组HepG2中c-Myc的mRNA和蛋白表达量;应用流式细胞仪检测转染前后各组HepG2的凋亡情况.结果:miR-145mRNA在正常肝组织中表达明显高于癌旁和肝癌组织(0.878±0.146vs0.265±0.084,0.271±0.096,均P<0.05);癌旁和肝癌组织中miR-145mRNA的表达量差别无统计学意义.miR-145mRNA在LO-2中的表达明显高于HepG2(0.755±0.185vs0.471±0.074,P<0.05).c-Myc mRNA和蛋白在癌旁和肝癌中表达均高于正常肝组织(mRNA:0.136±0.071,0.451±0.026vs0.029±0.023;蛋白:0.301±0.022,0.445±0.018vs0.137±0.011,均P<0.05),且在肝癌组织中表达量较癌旁组织中明显升高(P<0.05).转染miR-145mim-i c s后空白组、实验组、阴性对照组c-M y cmRNA表达差异无统计学意义;而相对于空白组和阴性对照组,实验组c-Myc蛋白表达量表达明显下降(0.146±0.011vs0.366±0.014,0.350±0.013,均P<0.05),空白组和阴性对照组之间差异无统计学意义.流式细胞术检测发现,在HepG2中上调miR-145的表达后,细胞的凋亡明显增多,实验组与空白组和阴性对照组之间有明显差异(3.000±0.100vs1.167±0.153,0.933±0.208,均P<0.05).结论:miR-145反向调节c-Myc的表达;表达下调的miR-145丧失对c-Myc的抑制可能是肝癌发生的重要机制;miR-145能够作为抑癌基因促进细胞凋亡.
