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Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (3): 73-81.doi: 10.3969/j.issn.0253-2417.2017.03.010

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Antioxidant Activity and Enzyme Inhibitory Activity of Proanthocyanidins from Sargentodoxa cuneata(Oliv) Rehd.et Wils.

LI Yan1, LI Xin1, LIU Jingling1, DENG Kaihang1, LIANG Zongsuo1,2   

  1. 1. College of Life Sciences, Northwest A & F University, Yangling 712100, China;
    2. College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
  • Received:2016-10-18 Online:2017-06-25 Published:2017-07-03

Abstract: Proanthocyanidins were extracted from Sargentodoxa cuneata (Oliv) Rehd. et Wils., and the crude extract was purified and isolated. The content of proanthocyanidins was determined by an improved vanillin-HCl colorimetric method. Meanwhile, the antioxidant activity and enzyme inhibitory activity of each sample were measured. The results showed that the contents of proanthocyanidins in the crude extract(CE), petroleum ether fraction(PE), ethyl acetate insoluble fraction(EIF), ethyl acetate fraction(EF), n-butanol fraction(BF) and water residue(WR) were (36.03±0.40)%, (1.19±0.11)%, (57.99±0.22)%, (32.40±0.07)%, (25.03±0.08)% and (41.32±0.37)%, respectively. Moreover, the proanthocyanidin content of the sample purified by Sephadex LH-20 was (98.35±0.72)%, which was 2.73 times of that of the crude extract. The DPPH free radical scavenging activity of the crude extract(IC50=178.10±2.67 mg/L) was 1.12 times of that of L-ascorbic acid(IC50=78.89±1.67 mg/L); the α-glucosidase inhibitory activity of purified sample was 120.71 times of that of acarbose and the corresponding acetylcholine inhibitory activity was 1.14 times of that of tacrine. It showed that there were abundant proanthocyanidins in S. cuneata and the proanthocyanidins had an obvious antioxidant activity and enzyme inhibitory activity in vitro.

Key words: proanthocyanidins, DPPH free radical scavenging activity, glycosidase inhibitory activity, cholinesterase inhibitory activity

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