Journal
FOOD & FUNCTION
Volume 6, Issue 8, Pages 2598-2606Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5fo00249d
Keywords
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Funding
- NSFC
- Guangdong Provincial Government [U1301211]
- National Basic Research Program of China [2012CB722904]
- International Science & Technology Cooperation Program of China [2012DFA31400]
- National 948 project [2012-S18]
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Three litchi polysaccharide fractions (LPFs), LP-4, LP-6 and LP-8, were obtained by fractional precipitation using 40%, 60% and 80% ethanol, respectively. The physicochemical properties, chemical antioxidant, and cellular antioxidant and antiproliferative activities of the three polysaccharide fractions were compared. LP-6 contained the highest contents of uronic acid and binding protein among the three fractions, whereas LP-8 contained the least. Amino acid composition analysis of the binding protein revealed that LP-6 contained the most acidic and aromatic amino acids. However, LP-8 contained more galactose and mannose than LP-4 and LP-6. LP-6 exhibited the highest chemical antioxidant activities, with an oxygen radical absorbance capacity of 28.14 mu mol TE per g DW. LP-8 exhibited higher cellular antioxidant activity and a greater inhibitory effect on the proliferation of A549, HepG2 and MGC-803 cells at a concentration of 100-800 mu g mL(-1) than LP-4 and LP-6. In summary, the different LPFs exhibited different antioxidant and antiproliferative activities with differential physicochemical properties.
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