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KMID : 1007520230320020221
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Food Science and Biotechnology
2023 Volume.32 No. 2 p.221 ~ p.228
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Screening of antioxidant capacity of Nepali medicinal plants with a novel singlet oxygen scavenging assay
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Seo Chan
An Hyun-Woo
Han Won
Lee Joo-Won
Krishna K. Shrestha
Jung Won-Kyo
Shin Joong-Ho
Lee Sang-Gil
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Abstract
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Pollutant exposure due to industrial development increases oxidative stress in human bodies. Dietary intake of antioxidant shows a protective effect against oxidative damage induced by oxidative stress. Therefore, the development of natural antioxidants is needed. In this study, the antioxidant activities of some Nepali medicinal plant extracts were measured. Using Rose bengal and 3,3′,5,5′-tetramethylbenzidine, a novel assay was utilized to evaluate the singlet oxygen scavenging capacity, and showed a strong correlation with other antioxidant assays. Also, antioxidant capacities based on four assays including the singlet oxygen scavenging assay were highly correlated (≥?0.858) with the total phenolic contents in the medicinal plant extracts. Among the selected extracts, Persicaria capitata, Elaphoglossum marginatum and Eurya acuminata showed the highest antioxidant capacities. Overall, this study presents a novel approach for evaluating singlet oxygen scavenging capacity, and performed a screening of antioxidant capacities of 54 Nepali herbal medicines.
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KEYWORD
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Singlet oxygen scavenging capacity, Medicinal plant, Antioxidant, Total phenolic content, Rose bengal
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