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Molecular basis for cannibalism behavior

Research Project

Project/Area Number 21K18236
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionHiroshima University

Principal Investigator

CHIHARA Takahiro  広島大学, 統合生命科学研究科(理), 教授 (00431891)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Fiscal Year 2023: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2022: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2021: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Keywords共食い / 感覚 / ショウジョウバエ / 嗅覚 / 味覚
Outline of Research at the Start

共食いは無脊椎動物から脊椎動物まで様々な生物で観察され、進化の観点から理に適った行動と考えられています。多くの場合、種の繁栄に有利に働くとされており、共食いは生物がもつ生得的行動と捉えられています。しかし、共食いに関する研究の殆どは現象の観察・記載に留まっており、その分子機構については殆ど分かっていません。研究代表者はショウジョウバエを用いた神経遺伝学的研究を行う過程で、偶然にも、特定の化学受容変異体の幼虫が“共食い行動”を示すことを見出しました。本研究では、この“共食い変異体”を切り口に、共食い行動の分子基盤、特に化学受容による共食い行動制御の分子機構を解明します。

Outline of Final Research Achievements

First, I examined the developmental process of the ‘cannibalism mutant’ and found that the development of the cannibalism mutant was significantly delayed in the larval stage compared to the wild type. Interestingly, when the wild type and the cannibalism mutant were reared together under the same conditions, the developmental rate of the wild type was significantly delayed. The cannibalism mutants used in this study are ‘mutants with abnormal chemosensory reception’. Therefore, it is considered that cannibalistic behavior is suppressed by some kind of chemoreception.

Academic Significance and Societal Importance of the Research Achievements

共食いは多くの生物で観察される行動であることが知られているが、共食いを対象とした研究の歴史は浅い。共食いに関する研究のほとんどが博物学的な記載に留まり、分子生物学的・遺伝学的研究は皆無に近い。今回、ショウジョウバエを用いた共食い行動解析は、同種間の捕食行動である共食い行動の理解に留まらず、異種間での捕食行動を理解するきっかけにもなる。また、今回の共食い変異体は、化学感覚(嗅覚と味覚の双方)の変異体であることから、共食い行動が複数感覚の統合によって厳密に制御されていることを分子レベルで示す初めての研究となる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Comments on the Screening Results   Research-status Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (13 results) (of which Invited: 3 results)

  • [Journal Article] Akaluc/AkaLumine bioluminescence system enables highly sensitive, non-invasive and temporal monitoring of gene expression in Drosophila2023

    • Author(s)
      Ito Akira、Matsuda Nagisa、Ukita Yumiko、Okumura Misako、Chihara Takahiro
    • Journal Title

      Communications Biology

      Volume: 6 Issue: 1 Pages: 1270-1270

    • DOI

      10.1038/s42003-023-05628-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Systemic innate immune response induces death of olfactory receptor neurons in Drosophila2022

    • Author(s)
      Kenichi Takeuchi, Daichi Honda, Misako Okumura, Masayuki Miura, Takahiro Chihara
    • Journal Title

      Genes to Cells

      Volume: 27 Issue: 2 Pages: 113-123

    • DOI

      10.1111/gtc.12914

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 化学感覚受容によって抑制されるショウジョウバエ幼虫の共食い行動2024

    • Author(s)
      Nagisa Matsuda, Misako Okumura, Takahiro Chihara
    • Organizer
      第71回日本生態学会大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] ショウジョウバエ幼虫の化学感覚受容による共食い制御メカニズムの発見2023

    • Author(s)
      Nagisa Matsuda, Misako Okumura, Takahiro Chihara
    • Organizer
      日本動物学会 第94回山形大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Chemosensation inhibits cannibalistic behavior in Drosophila larvae2023

    • Author(s)
      Nagisa Matsuda, Misako Okumura, Takahiro Chihara
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] A chemosensory mutant exhibits cannibalism-like behavior in Drosophila2022

    • Author(s)
      Nagisa Matsuda, Misako Okumura, Takahiro Chihara
    • Organizer
      日本発生生物学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Chemosensation is necessary to control cannibalistic behavior in Drosophila larvae2022

    • Author(s)
      Nagisa Matsuda, Misako Okumura, Takahiro Chihara
    • Organizer
      日本ショウジョウバエ研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] Chemosensation is necessary to control cannibalistic behavior in Drosophila larvae2022

    • Author(s)
      Nagisa Matsuda, Misako Okumura, Takahiro Chihara
    • Organizer
      日本分子生物学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Exploring the extracellular functions of ALS-related protein VAP in Drosophila2021

    • Author(s)
      Kosuke Kamemura, Misako Okumura, Takahiro Chihara
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Identification and characterization of Hiat, a novel Hippo pathway- interacting amino acid transporter2021

    • Author(s)
      本田大智, 千原崇裕, 奥村美紗子
    • Organizer
      日本発生生物学会年会第54回大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Identification and characterization of Hiat, a novel Hippo pathway-interacting amino acid transporter2021

    • Author(s)
      本田大智, 千原崇裕, 奥村美紗子
    • Organizer
      14 th Japan Drosophila Research Conference
    • Related Report
      2021 Research-status Report
  • [Presentation] Hiat, a novel Hippo pathway-interacting amino acid transporter in the regulation of synapse formation and tissue growth in Drosophila2021

    • Author(s)
      本田大智, 千原崇裕, 奥村美紗子
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Investigating the extracellular functions of ALS-related ER protein VAP in Drosophila2021

    • Author(s)
      Kosuke KAMEMURA, Misako OKUMURA, Takahiro CHIHARA
    • Organizer
      14 th Japan Drosophila Research Conference
    • Related Report
      2021 Research-status Report
  • [Presentation] ALS関連小胞体タンパク質VAPの細胞内・外における生理機能2021

    • Author(s)
      千原崇裕
    • Organizer
      第 42 回日本基礎老化学会シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Intra- and extracellular functions of ALS-related ER protein VAP2021

    • Author(s)
      Takahiro Chihara
    • Organizer
      第64回日本神経化学会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-07-13   Modified: 2025-01-30  

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