Effect of emetine, a protein synthesis inhibitor, on larval tail resorption in the ascidian Halocynthia roretzi

DOI Web Site 参考文献16件
  • Matsumura Kiyotaka
    Fusetani Biofouling Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST) Present Address: Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry
  • Nagano Manami
    Fusetani Biofouling Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST)
  • Tsukamoto Sachiko
    Fusetani Biofouling Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST) Present Address: Graduate School of Natural Science and Technology, Kanazawa University
  • Kato Haruko
    Fusetani Biofouling Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST)
  • Fusetani Nobuhiro
    Fusetani Biofouling Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST) Present Address: Graduate School of Fisheries Sciences, Hokkaido University

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Ascidian tadpole larvae settle and metamorphose after a free-swimming period, and one of the typical morphological changes during metamorphosis is tail resorption. Halocynthia roretzi larvae cannot metamorphose for 6hrs after hatching even in the presence of metamorphosis inducers, which suggests that some internal changes occur in the larvae during this period. Larval protein synthesis was examined as one possibility by using a protein synthesis inhibitor, emetine. When tadpole larvae just after hatching were incubated with 5-10μM emetine, tail resorption did not occur. In contrast, larvae that were treated after a free-swimming period of 8 or 24hrs underwent tail resorption, although some were abnormal. These results suggest that protein synthesis during the swimming period is necessary for tail resorption.

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