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2022 Fiscal Year Final Research Report

regulation of glucose metabolism by the Inter and intra organ networks

Research Project

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Project/Area Number 19K18012
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Hodaka yamada  自治医科大学, 医学部, 講師 (70807247)

Project Period (FY) 2019-04-01 – 2023-03-31
Keywords臓器間ネットワーク / 耐糖能障害 / インスリン分泌 / 膵β細胞 / 糖尿病合併症
Outline of Final Research Achievements

The renal denervation group showed improved glucose tolerance on transperitoneal glucose tolerance (ipGTT) compared to db/db mice. Systemic administration of Imeglimin improved glucose tolerance and augmented insulin secretion (first phase) in GK rats. In isolated pancreatic β-cells, Imeglimin activated mitochondrial NAD+ metabolism, TRPM2 function, and membrane potential depolarization, but these effects were attenuated in TRPM2 knockout mice.

Free Research Field

糖代謝

Academic Significance and Societal Importance of the Research Achievements

糖尿病状態(db/dbマウス)におけるSGLT2阻害や機械的除神経は高血糖の腎障害を軽減する可能性が示唆された。またそのメカニズムの一旦に神経伝達物質アドレナリンによるSGLT2機能亢進の関与が考えられた。また膵β細胞にNAD産生刺激をImegliminで行うと、グルコース濃度依存性インスリン分泌が亢進し、TRPM2チャネル活性化が関与していた。腎交感神経活性化→腎SGLT2機能制御、腎細胞アポトーシスによる腎障害、imeglimin→NAD代謝(膵β細胞)→インスリン分泌経路の存在が示唆された。

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Published: 2024-01-30  

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