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http://dx.doi.org/10.11002/kjfp.2017.24.6.879

Radical scavenging and α-glucosidase inhibitory effects of Mongolian Iris bungei extract  

Jeong, Yun Hee (Department of Food Science and Biotechnology, Daegu University)
Jeong, Gyeong Han (Department of Food Science and Biotechnology, Daegu University)
Kim, Tae Hoon (Department of Food Science and Biotechnology, Daegu University)
Publication Information
Food Science and Preservation / v.24, no.6, 2017 , pp. 879-884 More about this Journal
Abstract
In a continuing screening of selected medicinal plants native to Mongolia, the antioxidant and ${\alpha}$-glucosidase inhibitory activities of methanol extract of Iris bungei were investigated. After extraction with 80% of methanol, the methanol fraction was further extracted with n-hexane, EtOAc and n-BuOH in order to obtain four different solvent-soluble fractions, namely n-hexane-soluble, EtOAc-soluble, n-BuOH-soluble and $H_2O$ residue. The antioxidant properties were evaluated by radical scavenging assay using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) ($ABTS^+$) radicals. The anti-diabetic efficacy of I. bungei extract was investigated by ${\alpha}$-glucosidase assay. All tested samples showed dose-dependent radical scavenging and ${\alpha}$-glucosidase inhibitory activities. Among the tested extracts, the EtOAc-soluble fractions showed the greatest radical scavenging activity and ${\alpha}$-glucosidase inhibitory properties among other solvent-soluble fractions. This result suggested that there was a significant relationship between the total phenolic content and biological efficacy. Thus, I. bungei extract might be considered as a new potential source of natural antioxidant and as a ${\alpha}$-glucosidase inhibitory source. A more systematic investigation of this biomass sill be performed for further investigation of activity against antioxidative and anti-diabetic effects.
Keywords
Mongolian Iris bungei; total phenolic contents; DPPH; $ABTS^+$; ${\alpha}$-glucosidase;
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