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Pathophysiological analysis of pancreatic alpha cell function targeting DPP-4 expression for future development of therapeutic strategies for diabetes

Research Project

Project/Area Number 21K08576
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionOsaka University

Principal Investigator

Kawamori Dan  大阪大学, 医学部附属病院, 准教授 (50622362)

Co-Investigator(Kenkyū-buntansha) 片上 直人  大阪大学, 大学院医学系研究科, 講師 (10403049)
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: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords糖尿病 / グルカゴン / 膵α細胞 / DPP-4 / GLP-1 / インクレチン
Outline of Research at the Start

全身に広く発現するペプチド分解酵素DPP-4 (DiPeptidyl Peptidase-4)は、特に糖代謝領域においてはGLP-1及びGIPというインクレチンの分解酵素として重要な病態的意義を有し、現在はDPP-4阻害薬が糖尿病治療に広く使用されている。しかしDPP-4の膵島内における意義は、これまで散見される研究報告からは未だ明らかな結論に至っていない。本研究はα細胞機能変化をDPP-4発現に着目して進め、現在定まっていないα細胞DPP-4の意義を明らかとするほか、これを標的とした新規グルカゴン・α細胞標的治療の開発につなげるものである。

Outline of Final Research Achievements

Diabetes mellitus is a major public health problem in Japan, with a wide variety of pathological conditions, complications and comorbidities, and this diversity often hinders clinicians in providing optimal care. In this project, we focused on functional changes in pancreatic α-cells with the aim of developing novel therapeutic strategies for diabetes in the future along with a better understanding of the disease. First, we found that the expression of DPP-4, an incretin-degrading enzyme, changes in glucagon-secreting cell lines in response to prolonged exposure to high glucose, as does glucagon secretion. In addition, DPP-4 expression was significantly upregulated in islet endocrine α-like cells induced from human iPS cells as differentiation progressed. These results suggest the importance of DPP-4 in α-cell function, islet development and cell differentiation, which has both academic significance in diabetology and societal importance in future public health.

Academic Significance and Societal Importance of the Research Achievements

大きな社会健康問題である糖尿病では、多彩な病態や合併症・併存症を有し、その病態の多様性から最適な治療法選択に難渋することも少なくない。本研究成果は糖尿病におけるα細胞機能変容やグルカゴン分泌異常の機序解明の糸口となり、インスリン偏重の糖尿病および代謝疾患の治療現状において、未来のα細胞・グルカゴン標的療法開発の学術的基盤となりうるものである。糖尿病学における学術的意義のみならず、将来の治療法開発に向けた基盤としての社会的意義を有するものと考えられる。

Report

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

    (14 results)

All 2024 2023 2022 2021

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (4 results)

  • [Journal Article] 糖尿病治療UPDATE2024「糖尿病治療薬・基礎研究・臨床評価が拓く、グルカゴンの重要性解明」2024

    • Author(s)
      河盛 段、河盛隆造
    • Journal Title

      CLINIC magazine

      Volume: 51 Pages: 26-36

    • Related Report
      2023 Annual Research Report
  • [Journal Article] 座談会 糖尿病病態研究と診療の未来2024

    • Author(s)
      大杉 満、田村好史、河盛 段
    • Journal Title

      Current Therapy

      Volume: 42 Pages: 164-169

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Newly discovered knowledge pertaining to glucagon and its clinical applications2023

    • Author(s)
      Kawamori D, Sasaki S
    • Journal Title

      J Diabetes Investig

      Volume: Online ahead of print Issue: 7 Pages: 829-837

    • DOI

      10.1111/jdi.14009

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Different post-pancreatectomy glucagon responses to a meal test between surgical approaches2023

    • Author(s)
      Matsuda Tsuguka、Himeno Natsumi、Nakashima Akira、Nakagawa Naoya、Kohashi Toshihiko、Kawamori Dan、Kamei Nozomu
    • Journal Title

      Endocrine Journal

      Volume: 70 Issue: 11 Pages: 1077-1085

    • DOI

      10.1507/endocrj.EJ23-0032

    • ISSN
      0918-8959, 1348-4540
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Change in pharmacodynamic variables following once‐weekly tirzepatide treatment versus dulaglutide in Japanese patients with type 2 diabetes (SURPASS J‐mono substudy)2023

    • Author(s)
      Yabe Daisuke、Kawamori Dan、Seino Yusuke、Oura Tomonori、Takeuchi Masakazu
    • Journal Title

      Diabetes, Obesity and Metabolism

      Volume: 25 Issue: 2 Pages: 398-406

    • DOI

      10.1111/dom.14882

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characteristic changes in plasma glutamate levels and free amino acid profiles in Japanese patients with type 1 diabetes mellitus2023

    • Author(s)
      Kawamori Dan、Kageyama Yoko、Tanaka Takayuki、Ishizaka Yuko、Hosoe Shigero、Katakami Naoto、Shimomura Iichiro
    • Journal Title

      Journal of Diabetes Investigation

      Volume: 14 Issue: 1 Pages: 111-121

    • DOI

      10.1111/jdi.13911

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Soluble T-cadherin promotes pancreatic β-cell proliferation by upregulating Notch signaling2022

    • Author(s)
      Okita Tomonori、Kita Shunbun、Fukuda Shiro、Fukuoka Keita、Kawada-Horitani Emi、Iioka Masahito、Nakamura Yuto、Fujishima Yuya、Nishizawa Hitoshi、Kawamori Dan、Matsuoka Taka-aki、Norikazu Maeda、Shimomura Iichiro
    • Journal Title

      iScience

      Volume: 25 Issue: 11 Pages: 105404-105404

    • DOI

      10.1016/j.isci.2022.105404

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 特集「生理活性ペプチド」各論5「グルカゴンに関する新知見と臨床応用」2022

    • Author(s)
      河盛 段
    • Journal Title

      BIO Clinica

      Volume: 37 Pages: 336-40

    • Related Report
      2021 Research-status Report
  • [Journal Article] 糖尿病における膵α細胞機能条の実態は?“bi-hormonal disorder”から“bi-directional disorder”へ&2021

    • Author(s)
      河盛 段、細江重郎
    • Journal Title

      月刊糖尿病

      Volume: 131 Pages: 45-51

    • Related Report
      2021 Research-status Report
  • [Presentation] シンポジウム「臨床・基礎におけるグルカゴン研究の進歩 / Recent progress in glucagon research: clinical and basic」グルカゴン分泌異常機序の解明とその臨床的検証 / Exploring the molecular mechanisms underlying abnormal glucagon secretion and its verification: research from basic to clinical2022

    • Author(s)
      河盛 段
    • Organizer
      第65回日本糖尿病学会年次学術集会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 内分泌代謝・糖尿病 内科領域専門医研修ガイドブック2023

    • Author(s)
      日本内分泌学会・日本糖尿病学会 編
    • Total Pages
      516
    • Publisher
      診断と治療社
    • ISBN
      9784787826046
    • Related Report
      2023 Annual Research Report
  • [Book] 糖尿病専門医研修ガイドブック改訂第9版2023

    • Author(s)
      日本糖尿病学会 編
    • Total Pages
      616
    • Publisher
      診断と治療社
    • ISBN
      9784787825742
    • Related Report
      2023 Annual Research Report
  • [Book] 糖尿病治療の手引2023 改訂58版増補2023

    • Author(s)
      日本糖尿病学会 編
    • Total Pages
      168
    • Publisher
      南江堂
    • ISBN
      9784524210046
    • Related Report
      2023 Annual Research Report
  • [Book] 血糖だけにこだわらない!糖尿病治療薬の考え方・使い方2023

    • Author(s)
      野見山崇 編
    • Total Pages
      256
    • Publisher
      日本医事新報社
    • ISBN
      9784784903740
    • Related Report
      2023 Annual Research Report

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

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