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Exploration of long-term expansion methods for pancreatic islets

Research Project

Project/Area Number 22K20925
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0904:Internal medicine of the bio-information integration and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Hirano Michitada  東京大学, 大学院医学系研究科(医学部), 客員研究員 (10965726)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsリプログラミング / 糖尿病 / MYCL / 再生医療 / 膵島 / β細胞 / 遺伝子改変マウス / マウスモデル / 細胞増殖 / 再生
Outline of Research at the Start

本研究では、膵島細胞の発生過程におけるMYCLに紐づいた増殖機構を理解することで、膵島細胞の効率的かつ永続的な増殖誘導方法を探索する。また、増幅させた膵島細胞の機能性や安全性については組織学的解析や移植実験を用いて評価する。さらに、マウス膵島細胞で得られた知見をヒト膵島細胞においても適応させることで、より効率的な膵島増幅を試みるとともに、糖尿病の再生医療への応用を目指す。

Outline of Final Research Achievements

The number of patients with diabetes worldwide continues to increase rapidly due to changes in lifestyle and social environment. Although islet transplantation is the ideal approach to improve diabetes, it is not widely common as a treatment due to shortage of donors. In previous report, we focused on the MYC family genes, and showed that the induction of MYCL alone provokes the endogenous expansion of functional INS-producing cells through the division of mature β cells.

In this study, we focused on the metabolic mechanisms that are changed in the proliferative process. It was showed that glucose stimulation with MYCL expression induced drastic proliferation both in vivo and in vitro. In particular, we found that insulin-producing cells were dominantly proliferated in this condition. In the future, this expandable approach of mature islet cells represents a potential therapeutic approach for diabetes.

Academic Significance and Societal Importance of the Research Achievements

糖尿病根治を目指した膵島移植治療の大きな課題は機能性の高い膵島の安定供給にある。 研究代表者は以前に世界で初めて機能的な膵島細胞の増幅に成功している。当時は膵島細胞の長期培養は困難であったが、本研究での培養環境の検討や増殖期膵島細胞の特性を解析することで、その問題点が大きく改善された。成熟膵島細胞の増幅誘導方法を最適化し、効率的かつ永続的な膵島増幅技術を開発することは、糖尿病根治を目指した再生医療の発展に意義のある研究であると言える。

Report

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

    (3 results)

All 2023

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Invited: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Reprogramming of pancreatic islet cells for regeneration and rejuvenation2023

    • Author(s)
      Hirano Michitada、Yamada Yasuhiro
    • Journal Title

      Current Opinion in Genetics & Development

      Volume: 82 Pages: 102099-102099

    • DOI

      10.1016/j.gde.2023.102099

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] リプログラミング技術を用いた成熟膵島細胞の増幅誘導2023

    • Author(s)
      平野利忠
    • Organizer
      第11回 Academy of Aging and CArdiovascular-diabetes Research
    • Related Report
      2022 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] グルコース経路活性化による膵島細胞の増殖活性化2023

    • Inventor(s)
      平野利忠、山田泰広
    • Industrial Property Rights Holder
      平野利忠、山田泰広
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-079704
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report

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Published: 2022-09-01   Modified: 2025-01-30  

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