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How do nematodes evade insect cellular immunity?

Research Project

Project/Area Number 21K05618
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39050:Insect science-related
Research InstitutionSaga University

Principal Investigator

Yoshiga Toyoshi  佐賀大学, 農学部, 教授 (00312231)

Project Period (FY) 2021-04-01 – 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 2023: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords線虫 / 昆虫 / 自然免疫 / 血球 / 包囲反応
Outline of Research at the Start

線虫において寄生が進化してきた背景として、線虫に共通する、免疫を回避するための基盤的機構の存在が考えられる。本課題ではこの機構を解明するため、モデル線虫Caenorhabditis elegansの変異体をスクリーニングすることによって線虫側の宿主免疫からの回避に関する遺伝子の探索を行う。また、宿主としてチョウ目昆虫を用い、昆虫の線虫に対する反応を生化学的・分子生物学的手法によって解明することによって、宿主と寄生者の相互作用を理解しようとするものである。

Outline of Final Research Achievements

The existence of a basic mechanism common to nematodes to evade immunity is expected to be one of the reasons why various nematodes have acquired parasitism on insects. In this study, we sought to elucidate such basic mechanisms and their evolution in nematodes. We screened for C. elegans mutants that are more likely to enhance or suppress nematode encapsulation, but were unable to obtain mutants corresponding to these mutations. We focused on in vivo screening. The establishment of an in vitro experimental system for more efficient screening should be considered.

Academic Significance and Societal Importance of the Research Achievements

寄生虫病は20世紀にはほぼ解決したと考えられているが、完全に解決には至っておらず寄生虫に対するワクチンの開発などはいまだに成功していない。その原因の一つは、線虫をはじめとする真核生物の寄生虫に対する異物認識機構が解明されていない点である。本研究では、線虫に対する昆虫による異物認識機構を解明するとともに、線虫による宿主からの異物認識回避機構の解明を行う。これによって昆虫を含めた動物がいかにして線虫をはじめとする真核生物の寄生虫に対して異物認識の進化を解明し、将来的には脊椎動物における寄生虫に対する新たな解決方法の確立につながるものと期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 2021

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (1 results) Book (1 results)

  • [Journal Article] Highlighting potential physical and chemical cues involved in conspecific recognition system in a predator nematode, Seinura caverna2023

    • Author(s)
      Ekino Taisuke、Yoshiga Toyoshi、Takeuchi-Kaneko Yuko、Ichihara Yu、Kanzaki Natsumi、Shinya Ryoji
    • Journal Title

      Integrative And Comparative Biology

      Volume: 63 Issue: 4 Pages: 865-876

    • DOI

      10.1093/icb/icad105

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] First Record of Free-Living Nematode Mylonchulus hawaiiensis from Bondowoso Regency-Indonesia2023

    • Author(s)
      Pradana Ankardiansyah Pandu、Yoshiga Toyoshi
    • Journal Title

      Jurnal Sumberdaya Hayati

      Volume: 9 Issue: 1 Pages: 17-23

    • DOI

      10.29244/jsdh.9.1.17-23

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The <i>Aphelenchoides</i> genomes reveal substantial horizontal gene transfers in the last common ancestor of free‐living and major plant‐parasitic nematodes2023

    • Author(s)
      Lai Cheng‐Kuo、Lee Yi‐Chien、Ke Huei‐Mien、Lu Min R.、Liu Wei‐An、Lee Hsin‐Han、Liu Yu‐Ching、Yoshiga Toyoshi、Kikuchi Taisei、Chen Peichen J.、Tsai Isheng Jason
    • Journal Title

      Molecular Ecology Resources

      Volume: 23 Issue: 4 Pages: 905-919

    • DOI

      10.1111/1755-0998.13752

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct antagonistic effect of entomopathogenic nematodes and their symbiotic bacteria on root-knot nematodes migration toward tomato roots2022

    • Author(s)
      Li Jingjing、Li Yang、Wei Xianqin、Cui Yonghe、Gu Xinghui、Li Xingyue、Yoshiga Toyoshi、Abd-Elgawad Mahfouz M.、Shapiro-Ilan David、Ruan Weibin、Rasmann Sergio
    • Journal Title

      Plant and Soil

      Volume: 484 Issue: 1-2 Pages: 441-455

    • DOI

      10.1007/s11104-022-05808-4

    • Related Report
      2022 Research-status Report
  • [Journal Article] Cuticle ultrastructure differences among the four adult forms of Deladenus nitobei (Tylenchomorpha: Allantonematidae)2022

    • Author(s)
      Ekino Taisuke、Yoshiga Toyoshi、Kanzaki Natsumi
    • Journal Title

      Nematology

      Volume: 24 Issue: 5 Pages: 491-498

    • DOI

      10.1163/15685411-bja10144

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Low-oxygen tolerance of Ditylenchus destructor (Tylenchida: Anguinidae)2022

    • Author(s)
      Sugita Yoshitaka、Sobagaki Tomoo、Yoshiga Toyoshi
    • Journal Title

      Applied Entomology and Zoology

      Volume: 57 Issue: 2 Pages: 131-136

    • DOI

      10.1007/s13355-021-00769-z

    • Related Report
      2022 Research-status Report
  • [Journal Article] チョウ目昆虫に対する線虫の病原性と害虫防除などへの利用2021

    • Author(s)
      小野雅弥,吉賀豊司
    • Journal Title

      蚕糸・昆虫バイオテック

      Volume: 90 Pages: 67-72

    • Related Report
      2021 Research-status Report
  • [Presentation] Host-seeking behavior of Steinernema siamkayai in response to host-odorants2023

    • Author(s)
      Ta-oun, P. and Yoshiga, T.
    • Organizer
      日本線虫学会
    • Related Report
      2023 Annual Research Report
  • [Book] バイオロジカル・コントロール 第2版2022

    • Author(s)
      仲井 まどか、日本 典秀
    • Total Pages
      200
    • Publisher
      朝倉書店
    • ISBN
      9784254420463
    • Related Report
      2022 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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