【摘要】 目的观察氨氯地平对氧化型低密度脂蛋白诱导的HUVEC-12内皮细胞中血小板源性生长因子BmRNA表达的影响,从一个新的角度探讨氨氯地平的抗动脉粥样硬化作用机制。方法预实验筛选出氧化型低密度脂蛋白对血小板源性生长因子B表达适宜的处理浓度(50 mg/L)与时间(24 h)。实验分为5组:对照组、氧化型低密度脂蛋白组和三个不同剂量(0.1、1.0和10.0μmol/L)氨氯地平组,用RT-PCR检测血小板源性生长因子BmRNA的表达。结果以50 mg/L氧化型低密度脂蛋白刺激HUVEC-12内皮细胞24 h。随着预处理氨氯地平浓度增加,细胞血小板源性生长因子B mRNA的表达逐渐降低,并呈现浓度依赖性,当浓度为10.0μmol/L时作用更明显。结论氧化型低密度脂蛋白可影响HUVEC-12内皮细胞中血小板源性生长因子B mRNA的表达,氨氯地平可下调氧化型低密度脂蛋白诱导的HUVEC-12内皮细胞中血小板源性生长因子B mRNA的表达。更多还原

【Abstract】 Aim To study the effect of amlodipine on platelet-derived growth factor-B(PDGF-B) mRNA expression in HUVEC-12 endothelial cells induced by oxidized low density lipoprotein(ox-LDL) to explore the new antiatherosclerotic role of amlodipine.Methods HUVEC-12 endothelial cells were treated with 50 mg/L ox-LDL for 24 hours through the preexperiment.The experiment groups included 5 groups: control group,ox-LDL group,different concentration(0.1,1.0 and 10.0μmol/L) of amlodipine pretreated for 0.5 h and treated with 50 mg/L ox-LDL for 24 h group.RT-PCR was used to detect the mRNA expression of PDGF-B.Results RT-PCR analysis showed that with ox-LDL and amlodipine treatment,the mRNA expression of PDGF-B was greatly decreased in a concentration-dependent manner.Conclusion Ox-LDL can affect the mRNA expression of PDGF-B in the HUVEC-12 endothelial cells.Amlodipine can down-regulate the mRNA expression of PDGF-B.更多还原