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KMID : 1160620120170020136
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Preventive Nutrition and Food Science
2012 Volume.17 No. 2 p.136 ~ p.140
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Bioactivity of Trifoliate Orange (Poncirus trifoliate) Seed Extracts
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Kim Seong-Yeong
Shin Kwang-Soon
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Abstract
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Trifoliate orange seed extracts (TSEs) were made using either distilled water (TW), ethanol (TE), or n-hexane (TH), to measure total polyphenol contents, DPPH and ABTS radical scavenging activities, and anti-complementary activity. The results showed that the total polyphenol content showed higher value at TE (235.24 μg/mL, p 0.05) than those of TW (132.65 μg/mL) and TH (165.44 μg/mL) at 10 mg/mL and TE exerted the highest DPPH radical scavenging activity (61.77%, p 0.05), which occurred in the following order: TE TW (56.87%) TH (39.78%). The results of ABTS radical scavenging activity showed that TW (34.26%) and TE (31.81%) showed similar activities, which were higher than TH (12.74%, p 0.05). Anti-complementary activity of TE (61% at 500 μg/mL) showed a higher activity when compared with the positive control (60% at 1,000 μg/mL) polysaccharide-K (PSK), a known immuno-active polysaccharide from Coriolus versicolor. Consequently, among TSEs, TE is a byproduct from trifoliate orange and could be an important source of dietary polyphenolic antioxidant compounds and immunopotentiating activity, including complement activation.
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KEYWORD
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trifoliate orange seed extract, polyphenol, antioxidant activity, DPPH radical scavenging activity, anti-complementary activity
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