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The physiological roles of UFMylation in pancreatic beta cells

Research Project

Project/Area Number 21K16373
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionJuntendo University

Principal Investigator

Uzawa Hirotsugu  順天堂大学, 医学部, 助教 (50848174)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsUFM1 / UFMylation / 膵β細胞 / 糖尿病 / ERストレス / ER-RQC / インスリン分泌 / UFMylaton
Outline of Research at the Start

UFMylationはユビキチン様修飾因子 (UFM1) によるタンパク質修飾である。UFMylationと小胞体 (ER) ストレス応答やオートファジーの関係が注目される一方で、その生理的意義は未解明な点が多い。本研究では、膵β細胞特異的なUFM1ノックアウトマウスを用いた解析を進めることで、膵β細胞においてUFMylaitonが担う役割を解明し、糖尿病に対する新規治療標的の開拓を目指す。

Outline of Final Research Achievements

UFMylation is a ubiquitin-like modification essential for maintaining cellular homeostasis. We hypothesize that UFMylation contributes to preserving pancreatic beta cell function and aim to elucidate the role of UFMylation in pancreatic β cells, primarily through analyses of pancreatic β cell-specific UFM1 knockout (UFM1-βKO) mice. Compared to the control group, these mice exhibited glucose intolerance and reduced β cell volume, probably associated with apoptosis and trans-differentiation. In addition, electron microscopic analysis revealed that ER stress is increased in beta cells in UFM1-βKO, and UFM1-βKO interbred with Akita mice, a representative ER stress model in beta cells, showed significant glucose intolerance. These findings demonstrate that UFMylation is essential in protecting beta cell function through maintaining ER homeostasis.

Academic Significance and Societal Importance of the Research Achievements

UFM化が膵β細胞の恒常性維持機構に重要な役割を果たしていることを見出した。特に、UFM化がERストレスの制御を通じて膵β細胞恒常性を制御することが示唆された。本研究はUFM化の膵β細胞での病態生理学的意義を明らかにした初めての知見であり、極めて学術的な意義が高い。一方で、その詳細な分子機構は不明でありUFM化が関連するER品質管理機構として注目されているERファジーの関与なども未解明である。今後は、UFM化を受ける基質の同定を中心に研究を進め、UFM化による膵β細胞恒常性調節のメカニズムを明らかにする。その制御により、新しい糖尿病治療法の創出に結びつくという社会的意義は大きいと期待される。

Report

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

    (6 results)

All 2024 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Monitoring autophagic flux in vivo revealed its physiological response and significance of heterogeneity in pancreatic beta cells2023

    • Author(s)
      Aoyama Shuhei、Nishida Yuya、Uzawa Hirotsugu、Himuro Miwa、Kanai Akiko、Ueki Kyosei、Ito Minami、Iida Hitoshi、Tanida Isei、Miyatsuka Takeshi、Fujitani Yoshio、Matsumoto Masaki、Watada Hirotaka
    • Journal Title

      Cell Chemical Biology

      Volume: - Issue: 6 Pages: 658-671.e4

    • DOI

      10.1016/j.chembiol.2023.03.001

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 膵 β 細胞の恒常性維持において UFMylation が果たす役割の検討2024

    • Author(s)
      鵜澤博嗣、西田友哉、飯田雅、青山周平、金井晶子、植木響政、正岡駿、池田恒基、和栗聡、小松雅明、綿田裕孝
    • Organizer
      日本糖尿病学会年次学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] UFMylation in pancreatic beta cells plays an important role in maintaining cellular homeostasis and glucose tolerance2023

    • Author(s)
      Yuya Nishida, Hirotsugu Uzawa, Akiko Kanai, Kyosei Ueki, Masaaki Komatsu, Hirotaka Watada
    • Organizer
      59th EASD Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 膵β細胞におけるUFMylation の病態生理学的意義の検討2023

    • Author(s)
      鵜澤博嗣、西田友哉、青山周平、金井晶子、伊藤南、植木響政、和栗聡、小松雅明、綿田裕孝
    • Organizer
      日本糖尿病・肥満動物学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 膵β細胞におけるUFMylationの 病態生理学的意義の検討2023

    • Author(s)
      鵜澤博嗣、西田友哉、青山周平、金井晶子、伊藤南、植木響政、和栗聡、小松雅明、綿田裕孝
    • Organizer
      日本糖尿病学会年次学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] UFMylation is associated with maintaining function of Pancreatic Beta Cells2022

    • Author(s)
      Hirotsugu Uzawa, Yuya Nishida, Shuhei Aoyama, Akiko Kanai, Minami Ito, Kyosei Ueki, Satoshi Waguri, Masaaki Komatsu and Hirotaka Watada
    • Organizer
      The 10th International Symposium on Autophagy
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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

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