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Mechanism of augmented phagocytic activity in liver by pioglitazone treatment

Research Project

Project/Area Number 17K08611
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General pharmacology
Research InstitutionNational Defense Medical College

Principal Investigator

NAKASHIMA Masahiro  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 免疫・微生物学, 助教 (70738103)

Co-Investigator(Kenkyū-buntansha) 中島 弘幸  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 免疫・微生物学, 助教 (10574064)
石塚 俊晶  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 薬理学, 教授 (30399117)
木下 学  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 免疫・微生物学, 准教授 (70531391)
関 修司  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 免疫・微生物学, 教授 (80531392)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsピオグリタゾン / 肝臓 / 貪食細胞 / 解糖 / Kupffer細胞 / アセトアミノフェン / 細菌 / マクロファージ / 好中球 / 貪食能
Outline of Final Research Achievements

Pioglitazone significantly prevented from septic death and improved bacterial elimination in the peripheral blood. Pioglitazone lowered serum proinflammatory cytokines and enhanced bacterial elimination in the liver, by increasing the phagocytic and bactericidal activities of liver F4/80+CD11b+ recruited macrophages (Mφ). Of note, CD206 expression and reactive oxygen species production in F4/80+CD11b+ recruited Mφ were enhanced.
Quantitative PCR revealed that hepatic CD11b+ cells (including Gr-1+CD11b+ neutrophils and recruited Mφ) augmented gene expression of rate-limiting enzymes for glycolysis by pioglitazone, and their improved phagocytic and bactericidal activities were abolished by glycolysis inhibiting reagents. Pioglitazone might strengthen the phagocytic and bactericidal activities of liver recruited Mφ and that these immunological activities are closely associated with their glucose catabolism.

Academic Significance and Societal Importance of the Research Achievements

多剤耐性菌の脅威が深刻さを増しつつある我が国の医療機関において、細菌感染に対する新たな治療法の確立は急務といえる。本研究は、糖尿病治療薬ピオグリタゾンを予め腹腔内投与したマウスでは、その後に大腸菌を経静脈投与することで誘発される敗血症の予後を改善させることができることを示したものである。
現在、細菌感染に対する抗生剤の開発は減少傾向にあると報告されている。そうした状況において、ピオグリタゾン投与による糖代謝の改善が細菌感染に対する防御能を向上させるとの知見は、社会的にも貢献できる知見であると考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (4 results)

All 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] The reduced bactericidal activity of neutrophils as an incisive indicator of water-immersion restraint stress and impaired exercise performance in mice2019

    • Author(s)
      Kinoshita M, Nakashima, H, Nakashima M, Koga M, Toda H, Koiwi K, Morimoto Y, Miyazaki H, Saitoh D, Suzuki H, Seki S
    • Journal Title

      Sci Rep

      Volume: 9 Issue: 1 Pages: 4662-4662

    • DOI

      10.1038/s41598-019-41077-5

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pioglitazone improves phagocytic activity of liver recruited macrophages in elderly mice possibly by promoting glucose catabolism2019

    • Author(s)
      Nakashima M, Kinoshita M, Nakashima H, Kotani A, Ishikiriyama T, Kato S, Hiroi S, Seki S
    • Journal Title

      Innate Immun

      Volume: 25 Issue: 6 Pages: 356-368

    • DOI

      10.1177/1753425919849620

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Pioglitazone reinforces liver innate immunity against bacterial infection in aged mice.2020

    • Author(s)
      Nakashima Masahiro, Kinoshita Manabu, Nakashima Hiroyuki, Seki Shuhji.
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Pioglitazone prevents sepsis in old mice by enhancing liver innate immunity2018

    • Author(s)
      Nakashima Masahiro
    • Organizer
      第47回日本免疫学会
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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