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Radical scavenging capacity and cytoprotective effect of enzymatic digests of Ishige okamurae

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Abstract

In order to obtain natural antioxidants of good quality from a marine bioresource, we selected the brown marine alga, Ishige okamurae, which is an abundant and unutilized source of biomass and grows near Jeju Island, South Korea. An enzymatic extraction technique was used in order to determine the antioxidant effects of I. okamurae using commercially available food-grade digestive enzymes. In the evaluation of the radical scavenging capacity of the enzymatic extracts from I. okamurae using an electron spin resonance (ESR) spectrophotometer, all of the enzymatic extracts showed profound dose-dependent radical scavenging abilities. The majority of enzymatic extracts generated by proteases (except for Neutrase) had stronger hydrogen peroxide scavenging effects than the carbohydrase extract. In particular, the cytoprotective effects of the Kojizyme extract against H2O2 - induced DNA damage increased significantly with increasing extract concentrations in our comet assay tests. These results showed that I. okamurae may prove to be a valuable natural source of antioxidants.

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Acknowledgements

This work was supported by the research grant of the Cheju National University in 2006.

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Authors and Affiliations

  1. Faculty of Applied Marine Science, Cheju National University, Jeju, 690 - 756, South Korea

    Soo-Jin Heo & You-Jin Jeon

  2. Marine and Environmental Research Institute, Cheju National University, Jeju, 695-814, South Korea

    You-Jin Jeon

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  1. Soo-Jin Heo
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  2. You-Jin Jeon
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Correspondence to You-Jin Jeon.

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Heo, SJ., Jeon, YJ. Radical scavenging capacity and cytoprotective effect of enzymatic digests of Ishige okamurae . J Appl Phycol 20, 1087–1095 (2008). https://doi.org/10.1007/s10811-008-9320-x

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  • DOI: https://doi.org/10.1007/s10811-008-9320-x

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