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Identification and functional analysis of molecules that regulate intracellular temperature

Research Project

Project/Area Number 20K21388
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 43:Biology at molecular to cellular levels, and related fields
Research InstitutionDoshisha University (2021-2022)
Kyoto University (2020)

Principal Investigator

Umeda Masato  同志社大学, 研究開発推進機構, 嘱託研究員 (10185069)

Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords細胞内温度 / 脂肪酸不飽和化酵素 / 膜脂質 / ミトコンドリア / ショウジョウバエ / 酸化的リン酸化 / ATP合成酵素 / 脂質
Outline of Research at the Start

従来、個々の培養細胞内の温度は、早い熱拡散により細胞外溶液と熱平衡にあり、細胞が自律的に細胞内温度を制御するとは考えられていなかった。申請者らは、ショウジョウバエの温度適応を解析する過程で、各種の細胞内温度計測プローブを駆使することにより、ショウジョウバエ細胞の細胞内温度が培養温度より3℃程高く維持されており、低温暴露によりATP合成酵素の活性化が促され、細胞内温度の恒常性維持応答が起こることを見出した。本研究では、細胞内温度の受容と温度制御に関わる分子群を同定することにより細胞内温度制御を司る分子経路を明らかにし、「温度」を介した新たな情報伝達機構の実体を把握し、その生物学的機能を解明する。

Outline of Final Research Achievements

Intracellular temperature affects a wide range of cellular functions in living organisms. However, it remains unclear whether temperature in individual animal cells is controlled autonomously as response in fluctuations in environmental temperature. We find that the intracellular temperature of steady-state Drosophila S2 cells is maintained in a manner dependent on delta9-fatty acid desaturase DESAT1.The DESAT1-mediated increase of intracellular temperature is caused by the enhancement of F1Fo-ATPase-dependent mitochondrial respiration that is coupled with thermogenesis. We also reveal that F1Fo-ATPase-dependent mitochondrial respiration is potentiated by cold exposure through the remodeling of mitochondrial cristae structure via DESAT1-dependent unsaturation of mitochondrial phospholipid acyl chains. Based on these findings, we propose a cell-autonomous mechanism for intracellular temperature control during environmental temperature changes.

Academic Significance and Societal Importance of the Research Achievements

温度は、分子の存在状態や反応性を規定する最も重要な物理量であり、生化学反応を始めとする全ての生命活動が温度により強く影響を受ける。従来、単培養した数十マイクロメーター程の細胞内温度は、早い熱拡散により細胞外溶液と熱平衡状態に達し、個々の細胞が自律的に細胞内温度の恒常性維持を図っているとは考えられて来なかった。本研究により、環境温の変動に対応して細胞内温度を制御する新たな分子機構が明らかにされ、「細胞内微小空間における細胞自律的な温度制御」と言う新たな概念を提出する点にその学術的意義がある。

Report

(3 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (4 results) (of which Invited: 4 results)

  • [Journal Article] Regulation of cell deformability by phospholipid transport2022

    • Author(s)
      塩見晃史, 長尾耕治郎, 梅田眞郷
    • Journal Title

      生化学

      Volume: 94 Issue: 1 Pages: 108-111

    • DOI

      10.14952/SEIKAGAKU.2022.940108

    • ISSN
      0037-1017
    • Year and Date
      2022-02-25
    • Related Report
      2021 Research-status Report
  • [Journal Article] Cell-autonomous control of intracellular temperature by unsaturation of phospholipid acyl chains2022

    • Author(s)
      Murakami A., Nagao K., Sakaguchi R., Kida K., Hara Y., Mori Y., Okabe K., Harada Y., Umeda M.
    • Journal Title

      Cell Reports

      Volume: 38 Issue: 11 Pages: 110487-110487

    • DOI

      10.1016/j.celrep.2022.110487

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Temperature sensitivity of Notch signaling underlies species-specific developmental plasticity and robustness in amniote brains2022

    • Author(s)
      Nomura Tadashi、Nagao Kohjiro、Shirai Ryo、Gotoh Hitoshi、Umeda Masato、Ono Katsuhiko
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 96-96

    • DOI

      10.1038/s41467-021-27707-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Extreme deformability of insect cell membranes is governed by phospholipid scrambling2021

    • Author(s)
      Shiomi A., Nagao K., Yokota N., Tsuchiya M., Kato U., Juni N., Hara Y., Mori M.X., Mori Y., Ui-Tei K., Murate M., Kobayashi T., Nishino Y., Miyazawa A., Yamamoto A., Suzuki R., Kaufmann S., Tanaka M., Tatsumi K., Nakabe K., Shintaku H., Yesylevsky S., Bogdanov M., Umeda M.
    • Journal Title

      Cell Reports

      Volume: 35 Issue: 10 Pages: 109219-109219

    • DOI

      10.1016/j.celrep.2021.109219

    • NAID

      120007052731

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] リン脂質スクランブラーゼにより昆虫細胞は高い変形能を獲得する2021

    • Author(s)
      塩見晃史, 長尾耕治郎, 梅田眞郷
    • Journal Title

      実験医学

      Volume: 39 Pages: 2928-2931

    • Related Report
      2021 Research-status Report
  • [Journal Article] Changes in the physicochemical properties of fish cell membranes during cellular senescence2020

    • Author(s)
      Akifumi Shiomi, Kohjiro Nagao, Hisae Kasai, Yuji Hara, Masato Umeda
    • Journal Title

      BIOSCIENCE, BIOTECHNOLOGY, AND BIOCHEMISTRY

      Volume: 84 Issue: 3 Pages: 583-593

    • DOI

      10.1080/09168451.2019.1695576

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Functional expression of Δ12 fatty acid desaturase modulates thermoregulatory behaviour in Drosophila2020

    • Author(s)
      Takuto Suito, Kohjiro Nagao, Kenichi Takeuchi, Naoto Juni, Yuji Hara, Masato Umeda
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 11798-11798

    • DOI

      10.1038/s41598-020-68601-2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of Phospholipid Flippase-mediated Activation of PIEZO1 Ion Channel in Myotube Formation2020

    • Author(s)
      原雄二、土谷正樹、平野航太郎、梅田眞郷
    • Journal Title

      Seibutsu Butsuri

      Volume: 60 Issue: 4 Pages: 222-226

    • DOI

      10.2142/biophys.60.222

    • NAID

      130007881669

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 動物におけるエネルギー代謝と熱産生の制御機構に関する研究2021

    • Author(s)
      梅田眞郷
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 生物の知、人間の知:Human Bumblebee2021

    • Author(s)
      梅田眞郷
    • Organizer
      京都技術士会講演会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 骨格筋再生における膜張力感知機構の役割2021

    • Author(s)
      原雄二、平野航太郎、森泰生、梅田眞郷
    • Organizer
      第73回日本細胞生物学会大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 膜脂質ダイナミクスの生物機能2020

    • Author(s)
      梅田眞郷
    • Organizer
      日本脂質生化学会 特別講演
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2020-08-03   Modified: 2024-12-25  

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