Chemical composition and glucose uptake effect on 3T3-L1 adipocytes of Ligustrum lucidum Ait. flowers

Ligustri lucidi Fructus is a traditional Chinese medicine and possesses various bioactivities,including hypoglycemic effect.Ligustrum lucidum Ait flowers are poorly investigated.Thus,we hypothesized that L.lucidum flowers also could have hypoglycemic effect.Chemical composition and glucose uptake effect of L.lucidum flowers on 3T3-L1 adipocytes were investigated.In this study,the components of L.lucidum flowers were investigated by various chromatographic and spectroscopic methods and the effects of L.lucidum flowers on the induction of glucose uptake were investigated by 3T3-L1 adipocytes.Seven compounds were isolated and identified from L.lucidum flowers,including ursolic acid(1),kaempferol-7-O-α-Lrhamnoside(2,KR),β-sitosterol(3),β-daucosterol(4),kaempferitrin(5,KF),10-hydroxy oleuropein(6,HO),and kaempferol-3-O-β-D-glucopyranoside-7-α-L-rhamnopyranoside(7,KGR).The results of glucose uptake showed that total extract(TE),KR,KF and HO from L.lucidum flowers significantly enhanced glucose uptake.This study demonstrated that compounds 2,5-7 were isolated for the first time from this plant and compounds 2 and 7 were isolated for the first time in genus Ligustrum,L.lucidum flowers,KR,KF and HO may possess potential hypoglycemic effect.

女贞子化学成分的UPLC-ESI-Q-TOF-MS分析

目的:采用UPLC-ESI-Q-TOF-MS技术对女贞子中的化学成分进行定性分析。方法:采用ACQUITY UPLC BEHC18色谱柱(2.1 mm×100 mm,1.7μm),以乙腈-0.1%甲酸溶液为流动相梯度洗脱;质谱使用ESI离子源,正离子与负离子模式下采集数据。结果:通过正、负离子质谱信息及元素组成分析并结合对照品与相关文献数据对照,共鉴定出14个化合物。结论:通过超高效液相色谱分离,质谱测定相对分子质量及相关文献数据信息检索确定女贞子中的化学成分,为阐明女贞子的药效物质基础提供有力的证据。

女贞果实不同成熟期多指标化学成分动态积累的分析与评价

目的对女贞果实不同成熟期化学成分动态积累进行分析评价。方法采用高效液相色谱法、可见分光光度法对女贞果实不同成熟期三萜类、裂环环烯醚萜苷类、苯乙醇类及糖类等成分进行测定,利用主成分分析的综合评分法对测定结果进行评价。结果不同成熟期各类型化学成分含量变化较大,主成分分析结果表明齐墩果酸、熊果酸、女贞苷可能同为影响女贞子药材质量的重要因子。结论综合评价提示10月下旬可作为江苏南京产女贞子药材的适宜采收期。