Background: Left ventricular hypertrophy (LVH) is a common cardiovascular complication and an independent risk factor for cardiovascular death in hemodialysis (HD) patients. Previous studies have shown that fibroblast...Background: Left ventricular hypertrophy (LVH) is a common cardiovascular complication and an independent risk factor for cardiovascular death in hemodialysis (HD) patients. Previous studies have shown that fibroblast growth factor 23 (FGF23), which has an important role in phosphate metabolism, is elevated in HD patients. Objectives: The aim of this study was to determine the association of FGF23 and LVH and the prognostic value of serum FGF23 level in HD patients. One hundred seven HD patients were evaluated for LVH by echocardiography. Serum FGF23 levels were measured using a commercial enzyme-linked immunosorbent assay kit. Results: Patients with LVH were more likely to have higher systolic blood pressure (BP) and LVH was significantly associated with female gender and higher serum levels of phosphate and calcium ×phosphate products. LVH was also associated with higher serum FGF23 level. Multivariate analysis indicated that serum FGF23 level, systolic BP, and serum phosphate level remained correlated with LVH. This suggested that serum FGF23 level is independently associated with LVH in our HD patients. Cox analysis indicated no significant difference in risk of death for patients with elevated serum FGF23 level. Conclusion: LVH has a high prevalence in HD patients, and FGF23 is independently associated with LVH but is not a predictor for prognosis during a 4-year follow-up period.展开更多
目的探讨微小核糖核酸125b(miR-125b)对成人心脏成纤维细胞(HCF-a)合成胶原、增殖、活化、迁移、凋亡的调控作用及对转化生长因子β1(TGF-β1)通路的影响。方法体外培养HCF-a细胞,分为空白对照组和miR-125b模拟物转染组。采用RT-PCR和We...目的探讨微小核糖核酸125b(miR-125b)对成人心脏成纤维细胞(HCF-a)合成胶原、增殖、活化、迁移、凋亡的调控作用及对转化生长因子β1(TGF-β1)通路的影响。方法体外培养HCF-a细胞,分为空白对照组和miR-125b模拟物转染组。采用RT-PCR和Western blot法检测胶原-Ⅰ、胶原Ⅲ、α-平滑肌肌动蛋白(α-SMA)、TGF-β1、p-Smad2、p-Smad3基因和蛋白表达情况;采用MTT法检测HCF-a细胞增殖情况;采用Transwell细胞迁移实验检测细胞迁移能力;采用流式细胞术检测细胞凋亡情况。结果与空白对照组相比,miR-125b过表达可明显上调Col-Ⅰ和Col-Ⅲ、α-SMA m RNA和蛋白的表达,促进细胞增殖、迁移和凋亡(P<0.05)。另外,经RT-PCR检测,与空白对照组比较,miR-125b过表达可明显促进TGF-β1 m RNA的表达水平(P<0.05);经Western blot检测,与空白对照组比较,miR-125b过表达对HCF-a细胞Smad2/Smad3蛋白磷酸化水平均有明显上调作用(P<0.05)。结论Mi R-125b可以通过调控TGF-β1/Smad通路参与心肌纤维化进程。展开更多
文摘Background: Left ventricular hypertrophy (LVH) is a common cardiovascular complication and an independent risk factor for cardiovascular death in hemodialysis (HD) patients. Previous studies have shown that fibroblast growth factor 23 (FGF23), which has an important role in phosphate metabolism, is elevated in HD patients. Objectives: The aim of this study was to determine the association of FGF23 and LVH and the prognostic value of serum FGF23 level in HD patients. One hundred seven HD patients were evaluated for LVH by echocardiography. Serum FGF23 levels were measured using a commercial enzyme-linked immunosorbent assay kit. Results: Patients with LVH were more likely to have higher systolic blood pressure (BP) and LVH was significantly associated with female gender and higher serum levels of phosphate and calcium ×phosphate products. LVH was also associated with higher serum FGF23 level. Multivariate analysis indicated that serum FGF23 level, systolic BP, and serum phosphate level remained correlated with LVH. This suggested that serum FGF23 level is independently associated with LVH in our HD patients. Cox analysis indicated no significant difference in risk of death for patients with elevated serum FGF23 level. Conclusion: LVH has a high prevalence in HD patients, and FGF23 is independently associated with LVH but is not a predictor for prognosis during a 4-year follow-up period.
文摘目的探讨微小核糖核酸125b(miR-125b)对成人心脏成纤维细胞(HCF-a)合成胶原、增殖、活化、迁移、凋亡的调控作用及对转化生长因子β1(TGF-β1)通路的影响。方法体外培养HCF-a细胞,分为空白对照组和miR-125b模拟物转染组。采用RT-PCR和Western blot法检测胶原-Ⅰ、胶原Ⅲ、α-平滑肌肌动蛋白(α-SMA)、TGF-β1、p-Smad2、p-Smad3基因和蛋白表达情况;采用MTT法检测HCF-a细胞增殖情况;采用Transwell细胞迁移实验检测细胞迁移能力;采用流式细胞术检测细胞凋亡情况。结果与空白对照组相比,miR-125b过表达可明显上调Col-Ⅰ和Col-Ⅲ、α-SMA m RNA和蛋白的表达,促进细胞增殖、迁移和凋亡(P<0.05)。另外,经RT-PCR检测,与空白对照组比较,miR-125b过表达可明显促进TGF-β1 m RNA的表达水平(P<0.05);经Western blot检测,与空白对照组比较,miR-125b过表达对HCF-a细胞Smad2/Smad3蛋白磷酸化水平均有明显上调作用(P<0.05)。结论Mi R-125b可以通过调控TGF-β1/Smad通路参与心肌纤维化进程。