Decreased transport of orally administered protein into the blood circulation of developing juveniles of Japanese eel Anguilla japonica.

DOI Web Site 参考文献42件
  • NAKAMURA OSAMU
    School of Fisheries Sciences, Kitasato University
  • SUZUKI YUZURU
    Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • AIDA KATSUMI
    Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • HATTA HAJIME
    Department of Food and Nutrition, Kyoto Women's University

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To clarify the quantitative changes in the transport of orally intubated protein into the blood circulation as macromolecules in development, immunoglobulin Y (IgY) extracted from chicken eggs was administered orally to juvenile Japanese eel, Anguilla japonica. For the first experiment, which was performed before the commencement of artificial feeding, the oral delivery of 2.0 μg/0.1 g bodyweight of IgY resulted in a rapid increase in plasma IgY to a maximum of 2.30 μg/mL. However, the transport of IgY into the blood decreased significantly in the experiments that followed, which were performed after 12, 25 and 42 days. During this period, bodyweight increased approximately by a factor of eight, and rapid growth of the stomach was observed histologically. Possible contributions for the development of the alimentary canal to the diminishment of intestinal protein assimilation are discussed.

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