摘要
为了从中药中筛选降脂药物,本文构建了低密度脂蛋白受体/荧光素酶(LDLR/Luc)报告基因系统。将LDLR/Luc报告质粒转染至HepG2细胞,并优化细胞接种密度、细胞培养时间以及检测底物浓度等条件,获得较高荧光素酶活性;进一步选择普伐他汀作为阳性对照药物,可明显提高LDLR/Luc转录活性,表明成功地建立了靶向ldlr转录活性的报告基因筛选体系。应用该体系对500余种中药提取物进行了筛选,决明子、泽泻、穿龙薯蓣等提取物显示阳性,与过去报道采用动物模型研究的结果一致。
In order to screen cholesterol-lowering drug from Traditional Chinese Medicine, LDLR/Lucifrase(Luc) reporter system was constructed. The LDLR/Luc reporter plasmid was transfected into HepG2 cells and the luciferase expression under the control LDLR promoter/enhancer region were obtained by the optimization of various conditions including cell density, incubated time of transfected cells and substrate volume in the assay system. As a positive control in the screening model we used paravastatin, which is known cholesterol-lowering drug, we show that the LDLR promoter activity was strongly elevated by paravastatin. These results indicated that a screening model in vitro targeting the transactivity of ldlr was established. The model was used to screen cholesterol-lowering drug from about 500 Traditional Chinese Medicine (TCM), in which Semen cassiae, Rhizoma alismatis and Dioscorea nipponica Makino exhibit positive signal, consistent with previous studies in animal model.
出处
《天然产物研究与开发》
CAS
CSCD
2005年第3期316-319,共4页
Natural Product Research and Development