鄂西清风藤化学成分及其α-葡萄糖苷酶抑制活性研究
2021-09-12丁同同邓颖邓璐璐李江穆淑珍
丁同同 邓颖 邓璐璐 李江 穆淑珍



摘 要: 为了研究鄂西清风藤在降低血糖方面的物质基础,该研究采用硅胶柱色谱、Sephadex LH-20 凝胶柱色谱、半制备型高效液相色谱和重结晶等分离纯化方法从鄂西清风藤中提取分离化合物,并采用PNPG法筛选体外活性。结果表明:从鄂西清风藤95%乙醇提取物中分离得到10个单体化合物,分别为Pronuciferine(1)、(6R, 6aS, P)-Isocorydine(2)、N-methylhernovine(3)、N-formyldehydroanonain(4)、Roemerine(5)、(-)-Tetrahydropalmatine(6)、N-feruloyltyramine(7)、N-p-coumaroyltyramine(8)、Quercetin(9)、Dibutylphthalate(10)。所有化合物均為首次从该植物中分离得到。采用PNPG法筛选体外活性,研究结果显示化合物7、8、9具有明显的α-葡萄糖苷酶抑制活性,IC50值为6.1~38.8 μmol·L-1,其中化合物7、8的活性是阳性药阿卡波糖的40倍。该研究结果丰富了鄂西清风藤化学成分研究,为该植物在降血糖方面的开发提供了科学依据。
关键词: 鄂西清风藤, 物质基础, 生物碱, 体外活性,α-葡萄糖苷酶
中图分类号: Q946.91 文献标识码: A 文章编号: 1000-3142(2021)07-1070-07
Abstract: In order to investigate the material basis of Sabia campanulata subsp. ritchieae in reducing blood sugar. A total of 10 monomer compounds were isolated from 95% ethanol extracts of S. campanulata subsp. ritchieae by gel column chromatography, Sephadex LH-20 gel column chromatography, semi-preparative high performance liquid chromatography and recrystallization. Ten compounds were Pronuciferine (1), (6R, 6aS, P)-Isocorydine (2), N-methylhernovine (3), N-formyldehydroanonain (4), Roemerine (5), (-)-Tetrahydropalmatine (6), N-feruloyltyramine (7), N-p-coumaroyltyramine (8), Quercetin (9) and Dibutylphthalate (10). All compounds were isolated from the plant for the first time. In vitro activity results showed that compounds 7, 8 and 9 had significant α-glucosidase inhibitory activity with IC50=6.1-38.8 μmol·L-1 by the method of PNPG. Expecially, the activities of compounds 8 and 9 were 40 times more than the positive drug acarbose. This study enriched the chemical constituents of S. campanulata subsp. ritchieae, and also provided a scientific basis for the development of this plant resource in reducing blood sugar.
Key words: Sabia campanulata subsp. ritchieae, material basis, alkaloid, in vitro activity, α-glucosidase
鄂西清风藤(Sabia campanulata subsp. ritchieae)为清风藤科(Sabiaceae)清风藤属(Sabia)植物,落叶灌木,主要分布于江苏、湖南、贵州等长江以南地区。该植物具有缓解风湿痹痛、脊髓炎、水肿、脚气、骨折、脊髓炎、跌打肿痛等功效(温迪等,2016),药理作用主要表现在抗炎、免疫调节、保肝、抗病毒、降血压、抗心率失常等方面(熊力群等,2017)。保肝活性主要是五环三萜类化合物,这类化合物也是人们研究的热点(李曼姝等,2018)。
鄂西清风藤作为清风藤属植物的一个种,该植物化学成分的研究主要包括五环三萜类和苯衍生物,药理学研究表明该植物所含的五环三萜类化合物对ConA造成的免疫性肝损伤具有一定的保护作用(王莉云等,2019)。但是关于该植物中含有的生物碱类化合物及其可能的降糖活性未有报道。……
