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Riboflavin photo-transformation of genistein and changes in radical scavenging activities of photo-transformed genistein derivatives

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Abstract

Genistein was treated with riboflavin photosensitization and the radical scavenging activities of mixtures of genistein and riboflavin were determined using DPPH and ABTS assays. For a period of light irradiation of 100 min, the initial concentration of genistein decreased by 79.1% for riboflavin photosensitization. New peaks were formed and the peak areas increased for a mixture of riboflavin photosensitized genistein. Genistein derivatives were tentatively identified as trihydroxy isoflavones or genisteins with an additional hydroxyl groups. The radical scavenging abilities of photo-sensitized genistein derivatives were significantly (p<0.05) increased, based on DPPH and ABTS results, compared to samples without visible light irradiation for 100 min of photosensitization. Riboflavin photo-transformation can enhance antioxidant activities in isoflavone aglycones.

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Authors and Affiliations

  1. Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Gyeonggi, 440-746, Korea

    Nam Gyu Seol, Mi-Ja Kim, BoRa Yi & JaeHwan Lee

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  1. Nam Gyu Seol
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  2. Mi-Ja Kim
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  3. BoRa Yi
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  4. JaeHwan Lee
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Correspondence to JaeHwan Lee.

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Seol, N.G., Kim, MJ., Yi, B. et al. Riboflavin photo-transformation of genistein and changes in radical scavenging activities of photo-transformed genistein derivatives. Food Sci Biotechnol 23, 1055–1059 (2014). https://doi.org/10.1007/s10068-014-0144-y

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  • DOI: https://doi.org/10.1007/s10068-014-0144-y

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