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Epigenomic analysis of MRSA outbreak strains to establish preventive methods

Research Project

Project/Area Number 22K16278
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53050:Dermatology-related
Research InstitutionOsaka University

Principal Investigator

Yamazaki Yuriko  大阪大学, 免疫学フロンティア研究センター, 特任助教(常勤) (70915272)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsMRSA / アウトブレイク / 多剤耐性菌 / NICU / エピゲノム / 院内感染
Outline of Research at the Start

メチシリン耐性黄色ブドウ球菌(MRSA)は皮膚の重症感染症の原因となる他、アトピー性皮膚炎を悪化させるなど皮膚に悪影響を及ぼす細菌の代表であり、アウトブレイクがしばしば問題となっている。一般的な対策として現在行われている医療従事者の接触感染対策や抗生剤使用ではアウトブレイクを十分に予防・制御することはできていない。代表者は最近、MRSA株がエピゲノム進化によって抗生剤寛容性、外来遺伝子取り込み能、バイオフィルム産生能を獲得しつつアウトブレイクを引き起こしたことを突き止めた。本研究ではアウトブレイクを起こす細菌の特徴を明らかにし、アウトブレイクの予防や制御につなげるという新しいアプローチを行う。

Outline of Final Research Achievements

Methicillin-resistant Staphylococcus aureus (MRSA) is a worldwide problem not only because it causes severe skin infections but also causes outbreaks in hospitals in immunocompromised patients. We found that a single MRSA strain in a single institution caused an outbreak while acquiring antibiotic tolerance, foreign gene incorporation ability, and biofilm production ability through epigenomic modification. By analyzing hospital-adapted strains deficient in genes involved in methylation patterns, this study elucidated the genes that caused the clinical characteristics of the outbreak strain and the genes responsible for driving the epigenomic evolution of the outbreak strain.

Academic Significance and Societal Importance of the Research Achievements

本研究ではMRSAのゲノム、エピゲノム解析技術によって、アウトブレイクを起こす細菌側の特徴を明らかにするという新しいアプローチを行った。複数のエピゲノム解析を組み合わせた結果、アウトブレイクを起こした株のメチル化の特徴を同定することができた。また、そのエピゲノムパターンを促すメチル化遺伝子を一部特定することもできた。本研究の知見により今後、アウトブレイクを起こしやすい株をモニタリングするシステムを構築することや、進化の獲得を促した環境因子を明らかにして細菌学的根拠のある予防法や治療法の確立に繋げることが期待できる。

Report

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

    (6 results)

All 2023 Other

All Int'l Joint Research (1 results) Presentation (3 results) (of which Int'l Joint Research: 3 results) Funded Workshop (2 results)

  • [Int'l Joint Research] National Institute of Health(米国)

    • Related Report
      2023 Annual Research Report
  • [Presentation] Staphylococcus aureus reversibly regulates Agr quorum sensing to cause an outbreak in a hospital2023

    • Author(s)
      Yuriko Yamazaki
    • Organizer
      International Societies for Investigative Dermatology Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Staphylococcus aureus reversibly regulates Agr quorum sensing to colonize hosts and cause an outbreak in a hospital2023

    • Author(s)
      Yuriko Yamazaki
    • Organizer
      第52回日本免疫学会学術集会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Staphylococcus aureus reversibly regulates Agr quorum sensing to cause an outbreak in a hospital2023

    • Author(s)
      Yuriko Yamazaki, Hiroki Takahashi, Akiko Takaya, Yumi Matsuoka-Nakamura, Manabu Fujimoto
    • Organizer
      INTERNATIONAL SOCIETIES FOR INVESTIGATIVE DERMATOLOGY MEETING
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Funded Workshop] 第52回日本免疫学会学術集会2023

    • Related Report
      2023 Annual Research Report
  • [Funded Workshop] International Societies for Investigative Dermatology Meeting 20232023

    • Related Report
      2023 Annual Research Report

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Published: 2022-04-19   Modified: 2025-01-30  

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