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the relationship between branched-chain amino acid metabolism and glucagon secretion in diabetes mellitus.

Research Project

Project/Area Number 21K21213
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0909:Sports sciences, physical education, health sciences, and related fields
Research InstitutionNagoya University

Principal Investigator

Wada Eri  名古屋大学, 環境医学研究所, 特任助教 (90910307)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords2型糖尿病 / グルカゴン / 分岐鎖アミノ酸 / 代謝 / 糖尿病 / 栄養
Outline of Research at the Start

糖尿病の高血糖の一因として、高グルカゴン血症が知られている。我々は、糖尿病病態でグルカゴン過剰分泌を引き起こす栄養素として分岐鎖アミノ酸(BCAA)を特定した。そのメカニズムには、膵島のBCAA代謝異常が関与していることを発見した。本研究では、膵α細胞のBCAA代謝異常とグルカゴン過剰分泌の関連に着目し、膵α細胞特異的BCAA代謝関連酵素のノックアウトマウスを用いて、これらの因果関係を明らかにし、詳細なグルカゴン分泌亢進メカニズムの解明を目指す。

Outline of Final Research Achievements

Dysregulation of glucagon is associated with the pathophysiology of type 2 diabetes. We previously reported that postprandial hyperglucagonemia is more obvious than fasting hyperglucagonemia in type 2 diabetes patients. Among them, postprandial hypersecretion of glucagon in the diabetic state is attributable to disordered BCAA catabolism in pancreatic islet cells. Therefore, we generated mice deficient in pancreatic α-cell-specific BCAA metabolism-related enzymes (Glucagon Cre, BDK floxed mice were crossed: αBDK-KO mice) and evaluated their glucagon secretory ability.

Academic Significance and Societal Importance of the Research Achievements

糖尿病病態では、インスリンの分泌障害に着目されがちな中、グルカゴンの分泌障害も病態に強く影響を及ぼしている。本研究ではグルカゴンの分泌障害機序を代謝の観点から解明し、食事療法および薬物療法双方への応用が期待できる。

Report

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

    (4 results)

All 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Disordered branched chain amino acid catabolism in pancreatic islets is associated with postprandial hypersecretion of glucagon in diabetic mice2021

    • Author(s)
      Wada Eri、Kobayashi Masaki、Kohno Daisuke、Kikuchi Osamu、Suga Takayoshi、Matsui Sho、Yokota-Hashimoto Hiromi、Honzawa Norikiyo、Ikeuchi Yuichi、Tsuneoka Haruka、Hirano Touko、Obinata Hideru、Sasaki Tsutomu、Kitamura Tadahiro
    • Journal Title

      The Journal of Nutritional Biochemistry

      Volume: 97 Pages: 108811-108811

    • DOI

      10.1016/j.jnutbio.2021.108811

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The new finding of branched-chain amino acids catabolism in the metabolic disease2022

    • Author(s)
      Eri Wada, Takayoshi Suganami, Tadahiro Kitamura
    • Organizer
      22nd International Congress of Nutrition
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 膵α細胞における分岐鎖アミノ酸代謝異常は糖尿病のグルカゴン過剰分泌に関与する2021

    • Author(s)
      和田恵梨, 小林雅樹, 菊池司, 平野瞳子, 大日方英, 河野大輔, 北村忠弘
    • Organizer
      日本内分泌学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 膵島のBCAA代謝異常は食後のグルカゴン分泌亢進に関与する2021

    • Author(s)
      和田恵梨, 小林雅樹, 菊池司, 平野瞳子, 大日方英, 河野大輔, 北村忠弘
    • Organizer
      日本糖尿病学会
    • Related Report
      2021 Research-status Report

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Published: 2021-10-22   Modified: 2024-01-30  

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