FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (13 ): 154-157.doi: 10.7506/spkx1002-6630-201013036

• Basic Research • Previous Articles     Next Articles

in vitro Antioxidant and Anti-microbial Activities of Lignan Compounds from Gynostemma pentaphyllum

WANG Xiao-wen1 ZHANG Hua-ping2 CHEN Feng2 WANG Xi3 WEN Wei-ye4   

  1. 1. Food Science and Engineering College, Shanxi Agricultural University, Taigu 030801, China
    2. Department of Food Science and Human Nutrition, Clemson University, Clemson South Carolina 29634, USA
    3. Department of Genetics and Biochemistry, Clemson University, Clemson South Carolina 29634, USA
    4. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China
  • Received:2010-06-25 Online:2010-07-01 Published:2010-12-29

Abstract:

Chemical investigations of the EtOH extract of Gynostemma pentaphyllum (Cucurbitaceae) led to the isolation of 3 lignans, named compounds Ⅰ, Ⅱ and Ⅲ. Compound Ⅲ showed stronger DPPH free radical scavenging activity when compared to BHT at the same concentrations, while compound Ⅰ had only very little DPPH free radical scavenging activity and compound Ⅱ failed to scavenge DPPH free radicals within the experimental concentration range. All the compounds had a weaker ability to chelate Fe2+ when compared to EDTA. Compound Ⅱ inhibited Streptococcus mutans to a certain extent and strongly inhibited Staphylococcus aureus, while had very little inhibitory effect against Salmonella enteritidis and Escherichia coli; also, compound Ⅲ could weakly inhibit Staphylococcus aureus, Salmonella enteritidis and Escherichia coli; and compound Ⅰ had the same but weaker antimicrobial spectrum as that of compound Ⅲ.

Key words: Gynostemma pentaphyllum, liganins, antioxidant activity, anti-microbial activity

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