Separation of flavonoids from Millettia griffithii with high‐performance counter‐current chromatography guided by anti‐inflammatory activity. Issue 3 (28th December 2014)

• Record Type: Journal Article
• Authors: Tang, Huan; Wu, Bo; Chen, Kai; Pei, Heying; Wu, Wenshuang; Ma, Liang; Peng, Aihua; Ye, Haoyu; Chen, Lijuan
• Is Part Of: Journal of separation science. Volume 38:Issue 3(2015:Feb.)
• Page Start: 523
• Page End: 529
• Publication Date: 2014-12-28
• Subjects: Separation (Technology) -- Periodicals; Chromatographic analysis -- Periodicals; 543.089
• DOI: 10.1002/jssc.201401068
• Languages: English
• ISSNs: 1615-9306

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <italic>Millettia griffithii</italic> is a unique Chinese plant located in the southern part of Yunnan Province. Up to now, there is no report about its phytochemical or related bioactivity research. In our previous study, the <italic>n</italic>‐hexane crude extract of <italic>Millettia griffithii</italic> revealed significant anti‐inflammatory activity at 100 μg/mL, inspiring us to explore the anti‐inflammatory constituents. Four fractions (I, II, III, and A) were fractionated from <italic>n</italic>‐hexane crude extract by high‐performance counter‐current chromatography with solvent system composed of <italic>n</italic>‐hexane/ethyl acetate/methanol/water (8:9:8:9, v/v) and then were investigated for the potent anti‐inflammatory activity. Fraction A, with the most potent inhibitory activity was further separated to give another four fractions (IV, V, VI, and B) with solvent system composed of <italic>n</italic>‐hexane/ethyl acetate/methanol/water (8:4:8:4, v/v). Compound V and fraction B exhibited remarkable anti‐inflammatory activity with nitric oxide inhibitory rate of 80 and 65%, which was worth further fractionation. Then, three fractions (VII, VIII, and IX) were separated from fraction B with a solvent system composed of <italic>n</italic>‐hexane/ethyl acetate/methanol/water (8:1:8:1, v/v), with compound VIII demonstrating the most potent inhibitory activity (80%). Finally, the IC<sub>50</sub> values of compound V and VIII were tested as 38.2 and 14.9 μM. The structures were identified by electrospray ionization mass spectrometry and<sup>1</sup>H and <sup>13</sup>C NMR spectroscopy.</p> </abstract>