New dammarane-type glycosides from Gynostemma pentaphyllum and their lipid-lowering activity
作者:Xin Weng、Yun-Yun Lou、Yun-Shan Wang、Ya-Ping Huang、Jian Zhang、Zhi-Qi Yin、Ke Pan
DOI:10.1016/j.bioorg.2021.104843
日期:2021.6
compounds (15-20) were isolated from G. pentaphyllum. Their structures were elucidated by means of various spectroscopic techniques. Eight isolates were evaluated the inhibitory effect on PCSK9 in HepG2 cells. The results showed that three dammarane-type glycosides (2, 3, 15) remarkably reduced PCSK9 expression at 10 μM concentration. These findings suggested that G. pentaphyllum was worthy of further investigation
绞股蓝作为食品和日记补充剂在中国有着悠久的历史。目前,市场上有一些针对高脂血症的产品,包括五叶菊茶、保健酒、保健食品等。为了发现前蛋白转化酶枯草杆菌蛋白酶/kexin 9 型 (PCSK9) 抑制剂,从G. pentaphyllum中分离出 14 种新的三萜皂苷,命名为绞股蓝皂苷 LXXXVIII-CI ( 1-14 ) 以及 6 种已知化合物 ( 15-20 )。通过各种光谱技术阐明了它们的结构。评估了八个分离株对 HepG2 细胞中 PCSK9 的抑制作用。结果显示,三种达玛烷型苷(2、3、15 )在10μM浓度下显着降低PCSK9表达。这些发现表明G. pentaphyllum值得进一步研究,以寻找小分子 PCSK9 抑制剂并促进其作为功能性食品成分的利用。