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Investigation of the mechanism of immune function reduction by diabetes mellitus

Research Project

Project/Area Number 20K17799
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55050:Anesthesiology-related
Research InstitutionKindai University

Principal Investigator

KITAURA Atsuhiro  近畿大学, 医学部, 助教 (20716485)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords糖化最終産物 / 糖尿病 / 免疫 / マクロファージ / 敗血症
Outline of Research at the Start

本研究は糖尿病による免疫低下の病因として、AGEsに着目したところに独自性がある。AGEsによる免疫を担当する細胞の機能変化のメカニズムが解明できれば、これまでの血糖コントロールとは異なる介入ポイントの探索につながる可能性がある。本研究では、まずマウス由来細胞においてメカニズムを検討ののち、実験動物や臨床症例から得られた検体における検討に進む予定である。

Outline of Final Research Achievements

Diabetes mellitus causes a decrease in immunity, leading to the development of infections and worsening prognosis. To understand the mechanism of immunocompromised immunity caused by diabetes, we focused on a substance called advanced glycation end products (AGEs), which are highly bioactive and are produced and accumulated after prolonged exposure to high blood glucose. AGEs have various effects on the immune system. Among them, we investigated the effects on the activity of macrophages, which are an important command post of the immune system. As a result, we found that AGEs suppress the normal immune response to bacteria by inhibiting the uptake of an inflammation-producing substance called lipopolysaccharide (LPS), which is derived from Gram-negative rods, into macrophages.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、糖化最終産物(AGEs)が、マクロファージのエンドサイトーシス抑制と、その下流経路にあたるマクロファージのサイトカイン分泌抑制を明らかにした。糖化最終産物は免疫系の中で中心的役割を担うマクロファージの機能を抑制する。本研究によって、糖尿病の免疫低下における新たなメカニズムを明らかにしたことは、in vitro 研究でまだ臨床応用にはほど遠いが、今後の糖尿病管理および糖尿病合併症管理において、新たな治療ターゲットを提供する可能性がある。糖尿病は日本でも有病率が高く、また脳血管疾患や血液透析の最も強い誘因となりうるので、もし将来的に臨床応用がかなった場合には、その波及効果は大きい。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (1 results)

All 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] Advanced glycation end-products reduce lipopolysaccharide uptake by macrophages2021

    • Author(s)
      Kitaura Atsuhiro、Nishinaka Takashi、Hamasaki Shinichi、Hatipoglu Omer Faruk、Wake Hidenori、Nishibori Masahiro、Mori Shuji、Nakao Shinichi、Takahashi Hideo
    • Journal Title

      PLOS ONE

      Volume: 16 Issue: 1 Pages: 0245957-0245957

    • DOI

      10.1371/journal.pone.0245957

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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