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Designing a seed compound to inhibit inflammation-related molecules exacerbating infectious diseases

Research Project

Project/Area Number 20K21490
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 47:Pharmaceutical sciences and related fields
Research InstitutionAsahikawa Medical College (2022)
Keio University (2020-2021)

Principal Investigator

Hara Hideki  旭川医科大学, 医学部, 教授 (30456892)

Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords感染症 / 炎症 / 薬剤耐性菌 / 感染 / インフラマソーム
Outline of Research at the Start

抗生物質の多用に伴い薬剤耐性菌の出現が世界的に大きな問題となっており、感染症に対する新たな治療方策の立案が早急な課題となっている。この問題を打開すべくバクテリオファージや抗菌ペプチドなどを用いた新たな感染症治療法が考案されているが、将来的な耐性化が懸念されている。そこで本研究では、耐性化を回避するために菌体を標的としない免疫療法を模索することで新たな感染症療法の立案を目指す。

Outline of Final Research Achievements

The drug resistance of various pathogenic bacteria, such as Staphylococcus aureus, has become a significant medical problem, and the urgent development of new treatment methods is necessary. We found that the inflammasome, an innate immune system, exacerbates Gram-positive bacteria infection. Therefore, in this study, we investigated whether inhibiting the inflammasome response could improve the infection and designed a new inhibitory seed compound. When we infected inflammasome-deficient mice with methicillin-resistant Staphylococcus aureus clinical isolates, the bacterial growth in vivo decreased compared with wild-type mice. Since the aggregation of ASC is essential for the inflammasome activation, we designed an inhibiting compound and introduced it into macrophages, resulting in the observed inhibition of the inflammasome response.

Academic Significance and Societal Importance of the Research Achievements

抗生物質の頻用により黄色ブドウ球菌や結核菌などの薬剤耐性化が世界的な問題となっており、感染症に対する新規治療法の立案が早急な課題となっている。新規抗菌薬の開発も進められているが新たな耐性菌の出現が懸念されていることから、大きな治療方針の転換が求められている。われわれはグラム陽性菌感染においてインフラマソーム応答が負に働くことに着目し、感染治療に応用する挑戦的研究を立案した。その結果、インフラマソーム応答を阻害することで薬剤耐性黄色ブドウ球菌の感染病態を改善することができた。また、インフラマソームを標的とした新規阻害化合物の設計および合成も順調に進行していることから将来的な実用化が期待される。

Report

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

    (17 results)

All 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Book (3 results)

  • [Int'l Joint Research] ミシガン大学(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ミシガン大学(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ミシガン大学(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Listeria toxin promotes phosphorylation of the inflammasome adaptor ASC through Lyn and Syk to exacerbate pathogen expansion2022

    • Author(s)
      Tanishita Yuko、Sekiya Hisateru、Inohara Naohiro、Tsuchiya Kohsuke、Mitsuyama Masao、Nunez Gabriel、Hara Hideki
    • Journal Title

      Cell Reports

      Volume: 38 Issue: 8 Pages: 110414-110414

    • DOI

      10.1016/j.celrep.2022.110414

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Gasdermin D mediates the maturation and release of IL-1α downstream of inflammasomes2021

    • Author(s)
      Tsuchiya K, Hosojima S, Hara H, Kushiyama H, Mahib M. R., Kinoshita T, Suda T
    • Journal Title

      Cell Rep.

      Volume: 34 Issue: 12 Pages: 108887-108887

    • DOI

      10.1016/j.celrep.2021.108887

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Advances in research of innate immune sensors and diseases2022

    • Author(s)
      Hara H
    • Organizer
      第51回 日本免疫学会総会国際シンポジウム
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inflammasome-mediated exacerbation of infectious diseases and its application2022

    • Author(s)
      Hara H
    • Organizer
      第51回 日本免疫学会総会国際シンポジウム
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] インフラマソーム応答を介した感染重症化機構2022

    • Author(s)
      原 英樹、吉村 昭彦、Nunez Gabriel
    • Organizer
      第34回微生物シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Activation of inflammasomes exacerbates Gram-positive bacteria infection through IL-18 production2022

    • Author(s)
      Hara H, Yoshimura A, Nunez G
    • Organizer
      JSICR/MMCB 2022 Joint Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] LLO promotes phosphorylation of the inflammasome adaptor ASC through Lyn to exacerbate infection2022

    • Author(s)
      Yuko Tanishita, Hisateru Sekiya, Gabriel Nunez, Akihiko Yoshimura, Hideki Hara
    • Organizer
      第95回日本細菌学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] Recognition of Gram-positive bacteria infection in macrophages through NLRP6 inflammasome2021

    • Author(s)
      Hideki Hara, Gabriel Nunez, Akihiko Yoshimura
    • Organizer
      The 27th international symposium on molecular cell biology of macrophages
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Molecular mechanism of inflammasome activation induced by Gram-positive bacteria infection2021

    • Author(s)
      Hideki Hara, Yuko Tanishita, Hisateru Sekiya, Gabriel Nunez, Akihiko Yoshimura
    • Organizer
      第44回 日本分子生物学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Lyn kinase signaling promotes inflammasome activation in macrophages infected with Listeria monocytogenes2021

    • Author(s)
      Hideki Hara, Gabriel Nunez, Akihiko Yoshimura
    • Organizer
      第50回 日本免疫学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] Analysis of the mechanism by which Gram-positive bacteria activates NLRP6 inflammasome2021

    • Author(s)
      Hideki Hara, Gabriel Nunez, Akihiko Yoshimura
    • Organizer
      第94回日本細菌学会総会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Book] 尿酸結晶とインフラマソーム2022

    • Author(s)
      原 英樹
    • Total Pages
      120
    • Publisher
      科学評論社
    • Related Report
      2022 Annual Research Report
  • [Book] 新型コロナウイルスの感染とインフラマソーム2022

    • Author(s)
      原 英樹
    • Total Pages
      110
    • Publisher
      先端医学社
    • Related Report
      2022 Annual Research Report
  • [Book] 新型コロナウイルスの感染とインフラマソーム2022

    • Author(s)
      原 英樹
    • Total Pages
      119
    • Publisher
      先端医学社
    • ISBN
      9784865505306
    • Related Report
      2021 Research-status Report

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Published: 2020-08-03   Modified: 2024-01-30  

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