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Understanding of embryonic nutrition in oophagous sharks: what are nutrition eggs?

Research Project

Project/Area Number 18K05838
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40040:Aquatic life science-related
Research InstitutionOkinawa Churashima Foundation

Principal Investigator

Nozu Ryo  一般財団法人沖縄美ら島財団(総合研究センター), 総合研究センター 動物研究室, 主任研究員 (70774397)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords板鰓類 / 卵食共食い / 栄養卵 / 性ホルモン / 卵食型サメ類 / 胎仔栄養摂取 / 卵巣 / 排卵
Outline of Final Research Achievements

Transcriptome analysis of the ovaries of the oophagous shark, Lamna ditropis, was conducted at each reproductive stage. As a result, only the gene expression patterns of ovaries during the gestation period (during the formation of nutrient eggs) were divided into different groups. In addition, nutrient eggs and pre-pregnant developed follicles were subjected to proteomic analysis and compared. As a result, more than 300 proteins were not detected in nutrient eggs. These results suggest that the nutrient eggs formed during gestation is not just “unfertilized” eggs, but a material specialized for nutrient supply.

Academic Significance and Societal Importance of the Research Achievements

卵食共食い型のサメ類において観察される栄養卵が単なる未受精卵ではなく、胎仔への栄養供給に特化した物質である可能性が示された。人工的に胎仔の育成をサポートすることが可能な胎内環境の再現が試みられている(サメ類の人工子宮)。本研究は人工子宮環境下における栄養供給に関する新たな知見の提供に寄与することが期待される。特に本研究から得られた情報を基に、詳細な成分分析等を行うことでこのことにより、胎仔の栄養供給方法の確立の基盤になると予想される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report

Research Products

(2 results)

All 2021 2019

All Presentation (1 results) (of which Invited: 1 results) Book (1 results)

  • [Presentation] 板鰓類の繁殖統御に向けたオミクスデータの活用2019

    • Author(s)
      野津 了、村雲 清美、松本 瑠偉、辰見 香織、工樂 樹洋、佐藤 圭一
    • Organizer
      日本動物学会第90回大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Book] 魚類の性決定・性分化・性転換2021

    • Author(s)
      菊池 潔、井尻成保、北野 健
    • Total Pages
      258
    • Publisher
      恒星社厚生閣
    • ISBN
      9784769916635
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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