摘要目的 探讨女贞子总黄酮对HepG2细胞脂代谢调节作用的分子靶点.方法 通过MTT、LDH确定女贞子总黄酮处理细胞的适宜刺量.逆转录-多聚酶链反应(RT-PCR)检测HepG2细胞中脂蛋白脂酶(LPL)、过氧化物酶体增殖物激活受体α(PPARα)及羟甲戊二酰辅酶A还原酶(HMGCR)mRNA的表达水平.结果 10-5g/ml的女贞子总黄酮上调LPL mRNA表达,10-6～10-4g/ml的女贞子总黄酮上调PPARα mRNA表达,10-5、10-4g/ml的女贞子总黄酮则下调HMGCR mRNA的表达.结论 女贞子总黄酮可能通过调控PPARα-LPL通路、HMGCR表达实现降脂作用.

abstractsObjective To study molecular target of total flavonoid in Ligustrum Lucidum Ait(TFL) on lipometabolism regulation of HepG2 cell.Methods Treatment doses of total flavonoid in Ligustrum Lucidum Ait were determined by MTT and LDH.The expression of lipoprotein lipase(LPL),3-hydroxy-3-methylglutary-coenzyme A redutasein(HMGCR)and peroxisome proliferator-actived receptorsα(PPARα)mRNA of HepG2 cell were determined by reversed transcription polymerase chain reaction(RT-PCR).Results Increased expression of LPL mRNA and PPARαmRNA with TFL(10-6～10-4g/ml)were found in HepG2 cells after treated with TFL(10-5g/ml),but decreased expression of HMGCR mRNA was found after treated with TFL(10-5,10-4 g/ml).Conclusion The potential mechanisms of total flavonoid in Ligustrum Lucidum Ait's hypolipidmic effects may be with its functions of regulating lipoprotein degradation through PPARα-LPL pathway,or regulating steroid biosynthesis by reducing HMGCR.