Abstract
Lonicera caerulea L. fruit is an excellent source of bioactive compounds. An efficient separation method of cyanins is important for the development of many value-added products and functional food ingredients. High-speed counter-current chromatography (HSCCC) was applied to isolate cyanins from Lonicera caerulea fruits with a biphasic solvent system composed of methyl tert-butyl ether/n-butanol/acetonitrile/water/trifluoroacetic acid (2:2:1:5:0.01, volume ratio). 1.41 mg of cyanidin 3, 5-O-diglucoside, 1.08 mg of cyanidin 3-O-rutinoside and 6.38 mg of cyanidin 3-O-glucoside were obtained from 40 mg of crude extract. The purities of these compounds were 95.8%, 92.4% and 97.6%, respectively, as identified by high-performance liquid chromatography–diode array detection (HPLC-DAD) and high-performance liquid chromatography-electrospray ionization mass spectrometryn (HPLC-ESI/MSn). In addition, the dominant anthocyanin, cyanidin 3-O-glucoside was demonstrated cytotoxic response of human hepatocarcinoma SMMC-7721 cells, inducing live cancer cell apoptotic by flow cytometric analysis.
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