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Studies on development of control measures of Cryptocaryon irritans infectios based on integrated pest management

Research Project

Project/Area Number 19H00948
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 40:Forestry and forest products science, applied aquatic science, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Yoshinaga Tomoyoshi  東京大学, 大学院農学生命科学研究科(農学部), 特任教授 (20345185)

Co-Investigator(Kenkyū-buntansha) 渡邊 勇歩  東京大学, 大学院農学生命科学研究科(農学部), 助教 (40895893)
白樫 正  近畿大学, 水産研究所, 准教授 (70565936)
伊藤 直樹  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (30502736)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥43,940,000 (Direct Cost: ¥33,800,000、Indirect Cost: ¥10,140,000)
Fiscal Year 2023: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2022: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2021: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2020: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2019: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Keywords海産白点虫 / Cryptocaryon irritans / ワクチン / 化学療法 / 生態 / 概日リズム / 培養 / 総合的病虫害管理 / 光反応性 / 産魚の白点虫 / イオノフォア / in vitro 培養 / 寄生性せん毛虫 / 海産白点病 / 病害防除 / 海産魚の白点虫 / 光受容 / プロテアーゼ / 魚類寄生虫 / 総合的病害虫管理
Outline of Research at the Start

海面網生け簀におけるCryptocaryon irritas(海産白点虫)の寄生による産業被害を統合的病害虫管理(IPM:Integrated Pest Management)を導入することによって防除あるは軽減するための手法開発にむけた研究を行う。具体的には、白点虫の生態学的特性に基づく発生予測技術の開発、有効かつ安全な薬剤療法の開発、有効な抗原の探索と免疫法選択によるワクチン開発を試みる。加えて、海産白点病の研究の飛躍的進展に資するために、新たなin vitro 培養法の開発にも挑む。

Outline of Final Research Achievements

Research on the white spot disease of marine fishes caused by the parasitic ciliate, Cryptocaryon irritans, was conducted from the following four perspectives (I. Investigation of techniques for predicting outbreaks based on the ecological characteristics of the ciliate, II. Exploration of chemotherapeutic agents and investigation of their efficacy and safety, III. Investigation of vaccines using parasite-associated proteolytic enzymes as antigens and IV. Development of new in vitro culture methods)
For I, the details of the circadian rhythm of the release of infected larvae from cysts were clarified. For II and III, oral administration of ionophore antibiotics and DNA vaccines using genes of proteolytic enzymes were found to be effective for treatment and prophylaxis to some extent. For IV, an attempt was made to develop a culture method using apoptotic cells, but no better results were obtained than with the conventional method.

Academic Significance and Societal Importance of the Research Achievements

海産白点虫症は海産魚の陸上養殖や与える光周期によって、感染幼虫の放出時間を変化させることによって、のコントロールによって被害を抑える手法の開発に資するものである。また、イオノフォア抗生物質による治療法やタンパク分解酵素を抗原としてDNAワクチン開発の試みは、今後の本病にの予防・治療の開発・確立に資するものである。

Report

(7 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Comments on the Screening Results   Annual Research Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021 2020

All Journal Article (7 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Effect of light exposure on circadian rhythm in theront excystment in Cryptocaryon irritans2024

    • Author(s)
      Kotake Maho、Watanabe Yuho、Itoh Naoki、Yoshinaga Tomoyoshi
    • Journal Title

      Parasitology International

      Volume: 98 Pages: 102812-102812

    • DOI

      10.1016/j.parint.2023.102812

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Target Protein Expression on Tetrahymena thermophila Cell Surface Using the Signal Peptide and GPI Anchor Sequences of the Immobilization Antigen of Cryptocaryon irritans2023

    • Author(s)
      Watanabe Yuho、Asada Masahito、Inokuchi Mayu、Kotake Maho、Yoshinaga Tomoyoshi
    • Journal Title

      Molecular Biotechnology

      Volume: N/A Issue: 8 Pages: 1907-1918

    • DOI

      10.1007/s12033-023-00824-w

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vaccine Development against Cryptocaryoniasis: A Review2022

    • Author(s)
      Yuho Watanabe, Tomoyoshi Yoshinaga
    • Journal Title

      Fish Pathology

      Volume: 57 Issue: 1 Pages: 1-10

    • DOI

      10.3147/jsfp.57.1

    • ISSN
      0388-788X, 1881-7335
    • Year and Date
      2022-03-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of the protective effects of DNA vaccines encoding an infection-related cysteine protease from Cryptocaryon irritans, the pathogenic organism of cryptocaryoniasis2022

    • Author(s)
      Yuho Watanabe, Yuzo Takada, Maho Kotake, Kosuke Zenke, Naoki Itoh, Tomoyoshi Yoshinaga
    • Journal Title

      Aquaculture

      Volume: 548 Pages: 737641-737641

    • DOI

      10.1016/j.aquaculture.2021.737641

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Functional analysis of the proteases overexpressed during the invasive and parasitic stages of Cryptocaryon irritans and their potential as vaccine antigens2021

    • Author(s)
      Yuho Watanabe, Kosuke Zenke, Naoki Itoh, TomoyoshiYoshinaga
    • Journal Title

      Aquaculture

      Volume: 540 Pages: 736657-736657

    • DOI

      10.1016/j.aquaculture.2021.736657

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stable an quantitative small-scale laboratory propagation on Cryptoccaryon irritans2020

    • Author(s)
      Watanabe,Y, How K, Zenke K, Itoh N, Yoshinaga T.
    • Journal Title

      Method X

      Volume: 7 Pages: 101000-101000

    • DOI

      10.1016/j.mex.2020.101000

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Control of the daily rhythms by photoperiods in protomont detachment and theront excystment of the parasitic ciliate Cryptocaryon irritans2020

    • Author(s)
      Watanabe Y, How K, Zenke K, Itoh N, Yoshinaga T.
    • Journal Title

      Fish Pathology

      Volume: 55 Pages: 38-41

    • NAID

      130007881539

    • Related Report
      2020 Annual Research Report
  • [Presentation] 和歌山県で分離した海産白点虫 3 株の遺伝子配列と性質の比較2024

    • Author(s)
      松岡大海, 小竹真帆, 本領智記, 白樫 正, 良永知義, 伊藤直樹, 渡邊勇歩
    • Organizer
      令和6年度日本魚病学会春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Target protein expression on Tetrahymena cell-surface using the signal peptide and GPI-anchor sequences of a immobilization antigen of Cryptocaryon irritans2023

    • Author(s)
      Yuho Watanabe, Masahito Asada, Mayu Inokuchi, Maho Kotake, Tomoyoshi Yoshinaga
    • Organizer
      21st International Conference on Diseases of Fish and Shellfish
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 海産白点虫の日周性形成に関わる光強度と光受容体の探索2023

    • Author(s)
      小竹真帆、渡邊勇歩、伊藤直樹、良永知義
    • Organizer
      令和5年度日本魚病学会秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Effect of light exposure on the circadian pattern in theront excystment of Cryptocaryon irritans2023

    • Author(s)
      Maho Kotake, Yuho Watanabe, Naoki Itoh, Tomoyoshi Yoshinaga
    • Organizer
      21st International Conference on Diseases of Fish and Shellfish
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of light exposure on the circadian pattern in theront excystment of Cryptocaryon irritans2023

    • Author(s)
      Maho Kotake, Yuho Watanabe, Naoki Itoh, Tomoyoshi Yoshinaga
    • Organizer
      Sixth FRDC Australasian Scientific Conference on Aquatic Animal Health & Biosecurity Conference
    • Related Report
      2023 Annual Research Report
  • [Presentation] テトラヒメナを用いた偽海産白点虫の作製に向けた研究2023

    • Author(s)
      渡邊勇歩・麻田正仁・井ノ口繭・小竹真帆・ 伊藤直樹・良永知義
    • Organizer
      令和5年度日本魚病学会春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 海産白点虫プロテアーゼの感染防御抗原としての有効性2021

    • Author(s)
      渡邊勇歩・How Kah Hui・善家孝介・今城雅之・白樫正・伊藤直樹・良永知義
    • Organizer
      令和3年度日本魚病学会春季大会
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 海産魚スクーチカ症予防治療剤2023

    • Inventor(s)
      良永知義・虞晶晶
    • Industrial Property Rights Holder
      東京大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report

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Published: 2019-04-18   Modified: 2025-01-30  

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