Journal of Food, Agriculture and Environment

Antioxidant potentials of aqueous extracts from Rhus chinensis Mill leaves

Author(s):

Zhenyu Qiu ^1†, Mingli Tang ^1†, Guanjun Deng ^{1, 2}, Hao Yang ³, Xuan Zhang ^{1, 2}, Lifang Wu ^{1, 4}*

Recieved Date: 2013-05-22, Accepted Date: 2013-10-30

Abstract:

The gallnut and the Rhus chinensis Mill (RCM) plant was commonly used in traditional Chinese medicine. In the present study, the crude aqueous extract (CE) and polyphenol rich extract (PE) were obtained and evaluated for total polyphenol content and antioxidant capacity. The antioxidant activities were assessed using ferric-reducing antioxidant power (FRAP), 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2’-azinobis[3-ethylbenzthiazoline]-6-sulfonic (ABTS) and hydroxyl radical scavenging assay. Additionally, in order to verify the influence of the RCM extracts on biomolecules, a plasmid-DNA treatment was assayed. Our results showed that RCM extracts possessed important antioxidant characteristics which strongly correlated with their total phenolic content. Moreover, the antioxidant activity of PE was significantly higher than those of butylated hydroxytoluene (BHT) and Trolox in terms of DPPH and ABTS radical scavenging effects. PE was found to effectively inhibit the non site-specific DNA strand breakage through scavenging of free radicals. The plasmid DNA damage inhibition test in vitro further confirmed that aqueous extract from RCM rescued plasmid DNA injury from ROS produced by SnCl₂. Taken together, our findings suggest that the phenolic contents in RCM extracts could contribute to their antioxidant activity and pharmacological actions.

Keywords:

Rhus chinensis Mill, antioxidant, antimutagenic, polyphenols, hydroxyl radical, plasmid, DNA, ROS

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Food and Health
Pages: 496-501

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