目的:观察不同剂量的氧化型低密度脂蛋白(Oxidized low-densitylipoprotein,ox-LDL)和烟酸对脂肪细胞参与胆固醇流出的转运体—B族Ⅰ型清道夫受体(Scavenger receptor class B type I,SR-BI)和三磷酸腺苷结合盒转运体A1(ATP binding cassette transporter A1,ABCA1)的影响,并探讨其可能的机制,由此揭示脂肪细胞在动脉粥样硬化发生中的作用。
方法:培养3T3-L1脂肪细胞,至促分化成熟后,在不同浓度的ox-LDL(0,12.5,25,50μg/ml)和烟酸(0,0.25,0.5,1.0 mmol/L)干预后,收集细胞,用逆转录聚合酶链式反应(Reverse transcriptionpolymerase chain reaction,RT-PCR)检测ABCA1、SR-BI、肝X受体α(Liver X receptorα,LXRα)和过氧化物酶增殖物激活受体γ(Peroxisome proliferator-activated receptor gamma,PPARγ)m...
【英文摘要】
Objectives To investigate the effects of various concentrations of oxidized low density lipoprotein (ox-LDL) and niacin on the expression of ATP binding cassette transporter A1 (ABCA1) and Scavenger receptor class B type I (SR-BI) ,which are the key transporters involved in cholesterol efflux in adipocytes; explore the possible mechanisms; and reveal the new atheroprotective action of adipocytes on atheroslcerosis.
Methods Fully differentiated 3T3-L1 cells were incubated in the medium co...