大黄素对3T3-L1前脂肪细胞增殖分化及脂肪代谢的影响

目的　探讨大黄素对 3T3 L1小鼠前脂肪细胞增殖分化和对脂肪代谢的影响 ,以及探讨大黄素可能的减肥作用的药理机制。方法　MTT法测定细胞的增殖速度 ,油红O染色法测定细胞的分化速度 ,分光光度法测定脂肪酸合成酶活性。结果　大黄素在较低浓度下对 3T3 L1小鼠前脂肪细胞的增殖有一定的促进作用 ,但当浓度升高时 ,转化为剂量依赖性抑制作用 ;大黄素对 3T3 L1小鼠前脂肪细胞向脂肪细胞的分化以及对脂肪酸合成酶活性有剂量依赖性抑制作用。结论　本研究在国际上第一次报道大黄素对 3T3 L1小鼠前脂肪细胞增殖与分化及脂肪代谢有影响 ;大黄素可能具有潜在的减肥、降脂作用。

Effect of emodin on proliferation and differentiation of 3T3-L1 preadipocyte and FAS activity

Objective To study the effects of emodin on proliferation and differentiation of 3T3 L1 preadipocyte and the possible mechanism Methods Cell proliferation was determined by MTT spectrophotometry, cell differentiation was determined by Oil Red O staining, and fatty acid synthase (FAS) activity was determined by spectrophotometry Results Emodin promoted proliferation of 3T3 L1 preadipocyte at low concentration and inhibited the proliferation at high concentration in a dose related manner In contrast, it inhibited cell differentiation into adipocyte at low concentration in a dose related manner In vitro emodin inhibited the activity of FAS in a dose related manner Conclusions The effects of emodin on 3T3 L1 cell's proliferation and differentiation are dose dependent Emodin inhibits the activity of FAS Our results suggest that emodin should have a potential to serve as a fat reducing drug