The Presence and Origin of an Apocarotenoid,Galloxanthin in Ayu Plecoglossus altivelis

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  • Yamashita Eiji
    Department of Natural Products Research, Kyoto Pharmaceutical University Fine Chemical Group, Itano Refrigerated Food Co., Ltd.
  • Maruyama Yutaka
    Department of Natural Products Research, Kyoto Pharmaceutical University
  • Katsuyama Masaaki
    Department of Natural Products Research, Kyoto Pharmaceutical University
  • Tsushima Miyuki
    Department of Natural Products Research, Kyoto Pharmaceutical University
  • Arai Shigeru
    Fish Nutrition Division, National Research Institute of Aquaculture
  • Matsuno Takao
    Department of Natural Products Research, Kyoto Pharmaceutical University

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タイトル別名
  • The Presence and Origin of an Apocarotenoid, Galloxanthin in Ayu <i>Plecoglossus altivelis</i>
  • Presence and Origin of an Apocarotenoid

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An apocarctenoid, (3R)-galloxanthin, (3R)-10'-apo-β-carotene-3, 10'-diol, (1.1% of total carotenoids) has been isolated and identified from the integuments of wild mature koayu Plecoglossus altivelis. This is the first report of the occurrence of galloxanthin in fish.<br> Feeding experiments were carried out on young koayu with β-carotene, canthaxanthin, (3R)-β-cryptoxanthin, (3R, 3'R)-astaxanthin, (3S, 3'S)-astaxanthin, (3R, 3'R)-zeaxanthin, lutein A, andfucoxanthin. In the integuments, canthaxanthin and (3R)-β-cryptoxanthin were directly accumulated, but neither β-carotene nor fucoxanthin were accumulated. Lutein A was metabolized to lutein B. (3R)-Gal-loxanthin was produced by eccentric cleavage from (3R, 3'R)-zeaxanthin which is the principal carotenoid in koayu. (3R, 3'R)-Astaxanthin was reductively metabolized to (3S, 3'S)-zeaxanthin and finally converted to a new apocarotenoid (3S)-galloxanthin.

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