AMPK(AMP-activated protein kinase,腺苷酸活化蛋白激酶)是一种异源三聚体酶,存在于多种组织,如肝脏、骨骼肌、心肌、脑等。AMPK对调节体内能量平衡起到至关重要的作用,被称为"细胞能量感受器"。当机体受到生理或病理刺激导致能量消耗时,AMPK被激活,关闭合成代谢途径,抑制ATP消耗;开启分解代谢途径,维持细胞内ATP总水平。研究表明,AMPK的激活能够通过一些生理和药理作用因子,对心血管疾病产生积极的调节。因此,进一步深入对AMPK调节作用的研究,将为治疗心血管疾病提供新的治疗靶点。
Objective To study the chemical constituents from Desmodium triquetrum and their antihyperlipidemic activities. Methods The constituents of D. triquetrum were isolated and purified using various column chromatographies. Their chemical structures were elucidated using extensive spectroscopic methods. The lipid-lowering effects of the isolates were evaluated in HepG2 cells. Results Nine compounds were obtained from the ethanol extract of D. triquetrum and determined to be 6′-O-cis-p-coumaroyl-3,5-dihydroxyphenyl-β-D-glucopyranoside(1), tadehaginoside(2), rutin(3), quercetin-3-O-β-D-glucopyranoside(4), quercetin-3-O-β-D-galactopyranoside(5), 6-O-(E)-p-hydroxy-cinnamoyl-β-glucose(6), 6-O-(E)-p-hydroxy-cinnamoyl-α-glucose(7), kaempferol-3-O-β-D-rutinoside(8), and 3-O-β-D-galacopyranosyl(6-1)-α-L-rhamnosyl quercetin(9). Compounds 1 and 2 significantly reduced the intracellular content of total cholesterols and triglycerides. Conclusion Compound 1 is a new phenolic compound and exhibits potent anti-hyperlipidemic activity. Additionally, compounds 6 and 7 are isolated from D. triquetrum for the first time.
