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Discovery of microorganism-derived anti-MRSA therapeutic seed compounds that inhibit drug resistance factors

Research Project

Project/Area Number 21K06616
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47050:Environmental and natural pharmaceutical resources-related
Research InstitutionKitasato University

Principal Investigator

Asami Yukihiro  北里大学, 感染制御科学府, 教授 (70391844)

Co-Investigator(Kenkyū-buntansha) 君嶋 葵  北里大学, 感染制御科学府, 講師 (10832404)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords薬剤耐性因子 / 生物活性物質 / MRSA / 微生物由来
Outline of Research at the Start

我が国はMRSAなどのグラム陽性菌における薬剤耐性の割合は高く、入院患者から分離されている黄色ブドウ球菌のおよそ50%をMRSAが占めている。院内でのMRSA分離率は6.48%を示し、耐性菌のなかでも最も高い割合を示している。我が国では「薬剤耐性に関するグローバル・アクションプラン」で推進されている創薬研究に取り組んでいる。そこで、MRSAの薬剤耐性機構の一つであるPBP2'を阻害する創薬研究の例が少ないことから、微生物培養液由来の天然活性成分から抗MRSA治療薬シーズを発掘し、PBP2'阻害剤の創製を目指す本研究は、オリジナリティーが高く、世の中に求められる研究に位置づけられると考えられる。

Outline of Final Research Achievements

The bacteria resistant to beta-lactam antibiotics are an increasing concern. Remarkably, Gram-positive bacteria, which resist beta-lactam antibiotics commonly express PBP2', a protein to which these antibiotics cannot bind, thus evading their antimicrobial effects. This represents the main mechanism of resistance. Tackling this issue, it is believed that the use of PBP2' inhibitors potentially restores the efficacy of beta-lactam antibiotics. We have re-discovered tetronomycin from microbial cultures as an active agent with potent antibacterial activity against MRSA and other major anti-Gram-positive bacteria from the past year. Furthermore, we discovered a novel derivative of tetronomycin and started to elucidate its structure-activity relationship with each other. We further isolated and structurally identified 11 compounds from filamentous fungal cultures that exhibit activity-enhancing effects of MEPM and discovered a novel compound, phomoidride H.

Academic Significance and Societal Importance of the Research Achievements

2050年にはAMRによる全世界での死亡者数が1,000万人以上になると予想されている。AMR対策に資する研究成果は、学術的意義や社会的意義が高いと考えられる。本研究課題はその問題解決の一つとして薬剤耐性因子を標的とした微生物創薬研究の基盤研究になると期待できる。今後も本研究課題を継続することで、新しい創薬シーズ化合物が取得できると期待している。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022

All Journal Article (5 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] A new tetronomycin analog, broad‐spectrum and potent antibiotic against drug‐resistant Gram‐positive bacteria2024

    • Author(s)
      Kimishima Aoi、Tsuruoka Iori、Tsutsumi Hayama、Honsho Masako、Honma Sota、Matsui Hidehito、Sugamata Miho、Wasuwanich Paul、Inahashi Yuki、Hanaki Hideaki、Asami Yukihiro
    • Journal Title

      Chemistry & Biodiversity

      Volume: 21 Issue: 2

    • DOI

      10.1002/cbdv.202301834

    • Related Report
      2023 Annual Research Report
  • [Journal Article] The potentiation activity of β-lactam by phomoidrides and oxasetin against methicillin-resistant Staphylococcus aureus2024

    • Author(s)
      Honsho Masako、Kimishima Aoi、Ikeda Akari、Iwatsuki Masato、Nonaka Kenichi、Matsui Hidehito、Hanaki Hideaki、Asami Yukihiro、Sunazuka Toshiaki
    • Journal Title

      The Journal of Antibiotics

      Volume: 77 Issue: 3 Pages: 185-188

    • DOI

      10.1038/s41429-023-00691-2

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Synergistic effect of secondary metabolites isolated from <i>Pestalotiopsis</i> sp. FKR-0115 in overcoming β-lactam resistance in MRSA2023

    • Author(s)
      Taba Kanako、Honsho Masako、Asami Yukihiro、Iwasaki Hiromu、Nonaka Kenichi、Watanabe Yoshihiro、Iwatsuki Masato、Matsui Hidehito、Hanaki Hideaki、Teruya Toshiaki、Ishii Takahiro
    • Journal Title

      The Journal of General and Applied Microbiology

      Volume: 69 Issue: 4 Pages: 234-238

    • DOI

      10.2323/jgam.2023.06.001

    • ISSN
      0022-1260, 1349-8037
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rediscovery of tetronomycin as a broad-spectrum and potent antibiotic against drug-resistant Gram-positive bacteria2023

    • Author(s)
      Aoi Kimishima, Iori Tsuruoka, Hiroki Kanto, Hayama Tsutsumi, Naoaki Arima, Kazunari Sakai, Miho Sugamata, Hidehito Matsui, Yoshihiro Watanabe, Masato Iwatsuki, Masako Honsho, Kamrun Naher, Yuki Inahashi, Hideaki Hanaki, Yukihiro Asami
    • Journal Title

      ACS Omega

      Volume: 8 Issue: 12 Pages: 11556-11563

    • DOI

      10.1021/acsomega.3c00651

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A new isomaneonene derivative from the red alga Laurencia cf. mariannensis2022

    • Author(s)
      Takahiro Ishii, Arisu Tahara, Kanako Taba, Masato Iwatsuki, Masako Honsho, Yukihiro Asami, Kenichi Nonaka, Hideaki Hanaki, Toshiaki Teruya
    • Journal Title

      Journal of Asian Natural Products Research

      Volume: - Issue: 7 Pages: 1-7

    • DOI

      10.1080/10286020.2022.2130266

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 抗薬剤耐性グラム陽性細菌物質テトロノマイシンの再発見とその作用機序解析2023

    • Author(s)
      鶴岡伊織, 君嶋葵, 菅藤裕貴, 堤隼馬, 有馬直明, 酒井一成, 菅又美穂, 松井秀仁, 渡邊善洋, 岩月正人, 本庄雅子, Naher Kamrun, 本間颯太, 稲橋佑起, 花木秀明, 浅見行弘
    • Organizer
      第65回 天然有機化合物討論会 2023年9月4日
    • Related Report
      2023 Annual Research Report
  • [Presentation] 薬剤耐性グラム陽性細菌に対する広域かつ強力な抗菌活性を示すテトロノマイシンの再発見2023

    • Author(s)
      鶴岡伊織, 君嶋葵, 菅藤裕貴, 堤隼馬, 有馬直明, 酒井 一成, 菅又美穂, 松井秀仁, 渡邊善洋, 岩月正人, 本庄雅子, Naher Kamrun, 稲橋佑起, 花木秀明, 浅見行弘
    • Organizer
      日本農芸化学会2023年度大会 2023年3月15日
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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