›› 2017, Vol. 2 ›› Issue (4): 1-5.

• 药学 •    下一篇

长果颈黄芪根中抑制α-葡萄糖苷酶活性成分研究

  

  1. (1.大理大学药物研究所,云南大理671000;2.大理大学药学与化学学院,云南大理671000)
  • 收稿日期:2016-08-16 修回日期:2016-12-23 出版日期:2017-04-15 发布日期:2017-04-15
  • 作者简介:邱琳,硕士研究生,主要从事天然产物研究.
  • 基金资助:

    国家自然科学基金资助项目(31170313)

Study on the Compounds with α-Glucosidase Inhibitory Activity from Roots of Astragalus englerianus

  1. (1. Institute of Materia Medica of Dali University, Dali, Yunnan 671000, China; 2. College of Pharmacy and Chemistry,
    Dali University, Dali, Yunnan 671000, China)
  • Received:2016-08-16 Revised:2016-12-23 Online:2017-04-15 Published:2017-04-15

摘要:

目的:对长果颈黄芪(Astragalus englerianus)根化学成分进行研究,并对分离得到的化合物进行α-葡萄糖苷酶抑制活性
测试。方法:利用Rp-18、Sephadex LH-20、硅胶等分离手段对长果颈黄芪根部分的甲醇提取物进行分离纯化,通过现代波谱
学技术对相关化合物进行结构鉴定,并以4-硝基酚-α-D-吡喃葡萄糖苷(PNPG)为底物的酶抑制剂筛选模型对各样品进行α-
葡萄糖苷酶抑制活性实验。结果:从该植物根甲醇提取物的乙酸乙酯部位分离得到6个化合物,分别鉴定为:十六烷酸单甘油
酯(1)、2,4'-二羟基-4-甲氧基二氢查耳酮(2)、胡萝卜苷(3)、5α,6β-二羟基胡萝卜苷(4)、(3R)-vestitol-7-O-glucoside(5)、
(2S,3S,4R,8E)-2-[(2'R)-2'-羟基-二十四烷酰胺]-8-十八烯-1,3,4-三醇(6)。α-葡萄糖苷酶抑制活性结果显示,化合物2
具有显著抑制活性,IC50显著小于阳性对照阿卡波糖;化合物5 及其苷元(3R)-vestitol也显示一定的抑制活性。结论:化合物
1~6 均为首次从长果颈黄芪根中分离得到,其中黄酮类成分对α-葡萄糖苷酶具有较好的抑制活性。

关键词: 长果颈黄芪, 根, 化学成分, &alpha, -葡萄糖苷酶, 抑制活性

Abstract:

Objective: To study the chemical components of Astragalus englerianus, and to explore the active compounds of α-
glucosidase's inhibiting from the roots of Astragalus englerianus. Methods: The compounds were isolated and purified by Rp-18,
Sephadex LH-20 and silica gel column chromatography. Their structures were identified by modern spectroscopy techniques.
The α -glucosidase's inhibiting experiment was performed by using enzyme inhibitor screening model with 4-nitrophenol α -
D-glucopyranoside(PNPG)as the substrate. Results: Six compounds were isolated from ethyl acetate fraction of methanol extract
of the roots of A. englerianus and identified as 1- O- hexadecanolenin(1), 2,4'- dihydroxy- 4- methoxy dihydrochalcone(2),
daucosterol(3), 5α,6β- dihydroxy- daucosterol(4),(3R)- vestitol- 7- O- glucoside(5), and(2S,3S,4R,8E)- 2-[(2'R)- 2-
hydroxytetracosanoylamino]- 1,3,4- octadecanetriol- 8- ene(6). All of these compounds were examined for their α- glucosidase
inhibitory activities. As a result, compound 2 showed significantly activity with the lower IC50 than the positive control, acarbose.
Compound 5 and its aglucon,(3R)-vestitol also showed some inhibitory activity. Conclusion: All of the compounds were isolated from
the roots of A. englerianus for the first time, and the flavonoids showed the better α-glucosidase inhibitory activity than the other
compounds.

Key words: Astragalus englerianus, root, compounds, α-glucosidase, inhibitory activity

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