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Assessing the Impact of Ascorbic Acid on Oxidative Stress in Fish Embryos Exposed to Chemicals

Research Project

Project/Area Number 18K14522
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 40040:Aquatic life science-related
Research InstitutionKagoshima University

Principal Investigator

KOKUSHI EMIKO  鹿児島大学, 農水産獣医学域水産学系, 助教 (90714866)

Project Period (FY) 2018-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsアスコルビン酸 / メダカ / 魚胚 / 含酸素多環芳香族 / 催奇形性 / ヒメダカ / 含酸素多環芳香族炭化水素類 / 形態異常 / 酸化ストレス / 発生毒性 / 環境汚染物質 / 胚 / PAHs / 農薬 / 奇形誘発 / 抗酸化作用 / 毒性試験 / 化学物質影響 / 魚類 / 奇形
Outline of Final Research Achievements

Ascorbic acid (AsA) functions as an antioxidant and is also involved in cartilage formation. Previous research showed that exposing medaka embryos to oxygenated polycyclic aromatic hydrocarbons (OxyPAHs) resulted in morphological abnormalities in hatched fry, suggesting the potential impact of OxyPAHs-induced oxidative stress and AsA deficiency on cartilage formation. Therefore, this study aimed to create AsA-deficient embryos and expose them to OxyPAHs to investigate how oxidative stress occurring during chemical exposure affects the embryos. As a result, increased susceptibility associated with decreased AsA concentration in embryos was observed. Moreover, there was a temporal increase in the incidence of abnormalities related to bone formation, blood vessels, and the heart, suggesting the involvement of oxidative stress.

Academic Significance and Societal Importance of the Research Achievements

これまで化学物質暴露による形態異常や発生毒性は観察されていたが、それらの酸化ストレスとAsAの胚中濃度を明らかにする研究は行われていなかった。我々は親魚にAsAを欠乏させた餌を作成し、AsA欠乏胚を作成することで、胚中AsAの変動を明らかにするとともに、化学物質への感受性が増大することを明らかにした。本研究結果は、親魚の栄養摂取が化学物質暴露などのストレスへの耐性を高める可能性を示唆しており、養殖魚への餌の工夫やストレス耐性の高い次世代を育成するうえでの技術への知見として貢献できたと考えられる。

Report

(7 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2023 2019 2018 Other

All Presentation (4 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Presentation] アスコルビン酸の抗酸化作用を低下させたヒメダカ胚で誘発される酸化ストレス由来の影響に関する研究2023

    • Author(s)
      北條裕也、内村未来、山﨑雅俊、國師恵美子、宇野誠一
    • Organizer
      第2回環境化学物質3学会合同大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Monitoringof parent and alkylated PAHs in sediments of Tokyo Bay, Japan2019

    • Author(s)
      Emiko Kokushi, Machi Kawano, Tamaki Seki, Chouji Kawai, Miyuki Naruse, Aya Maehara, Jyunta Furukawa, Seiichi Uno
    • Organizer
      9th International Conference on Marine Pollution and Ecotoxicology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Toxicity evaluations of sediments collected in Ariakesea using embryos of Java medaka(Oryziasjavanicus)2019

    • Author(s)
      Emiko Kokushi, Miki Yamashita, Machi Kawano, Miyuki Naruse, Tamaki Seki, Chouji Kawai and Seiichi Uno
    • Organizer
      9th International Conference on Marine Pollution and Ecotoxicology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Endogenous effects in embryos of Japanese medaka exposed to oxygenated polycyclic aromatic hydrocarbons2018

    • Author(s)
      Machi Kawano, Seiichi Uno, Emiko Kokushi, Jiro Koyama
    • Organizer
      SETAC North America 39th Annual Meeting
    • Related Report
      2018 Research-status Report
  • [Remarks] 鹿児島大学水産学部附属海洋資源環境教育研究センター 環境保全学研究室

    • URL

      http://aquatox-kagoshima.com/

    • Related Report
      2020 Research-status Report

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Published: 2018-04-23   Modified: 2025-01-30  

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