Steroidal glycosides from the roots of Cynanchum stauntonii and their effects on the expression of iNOS and COX-2
作者:Chang-Zhi Lai、Jian-Xin Liu、Shu-Wen Pang、Yi Dai、Hua Zhou、Zhen-Qiang Mu、Jun Wu、Jin-Shan Tang、Liang Liu、Xin-Sheng Yao
DOI:10.1016/j.phytol.2016.02.016
日期:2016.6
Six new steroidal glycosides, named stauntosides O-T (1–6), along with eight known compounds (7–14), were obtained from the 95% aqueous ethanol extract of the roots of Cynanchum stauntonii. Their chemical structures were elucidated by IR, HR ESI-MS/MS, 1H- and 13C NMR, 1H-1H COSY, HSQC, HSQC-TOCSY, and HMBC spectroscopic analyses, which showed interesting 13,14:14,15-disecopregnane-type or 14,15-secopregnane-type
六个新的甾体糖苷,命名stauntosides OT(1 - 6)中,用8种已知化合物(沿7 - 14),从根的95%乙醇水溶液的提取物得到柳叶白前。通过IR,HR ESI-MS / MS,1 H-和13 C NMR,1 H- 1 H COSY,HSQC,HSQC-TOCSY和HMBC光谱分析阐明了它们的化学结构,结果显示有趣的13,14:14, 15-二癸基癸二烯型或14,15-二癸基癸烷型C 21类固醇糖苷。通过检测诱导型一氧化氮合酶(iNOS)和环氧合酶2(COX-2)对脂多糖(LPS)刺激的RAW246.7鼠巨噬细胞的抑制作用,研究了糖苷的抗炎作用。我们的结果表明,化合物1,5,8,9,11,和13可以显著抑制iNOS的表达,和化合物5和7可以清楚地减少RAW246.7细胞的COX-2表达LPS刺激的细胞相比,用LPS刺激和未经其他化合物处理。因此,化合物1,5,7-9,11,和1