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Molecular epidemiological study of Gram-positive cocci in Japan regarding novel resistance mechanisms to linezolid

Research Project

Project/Area Number 21K10401
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 58020:Hygiene and public health-related: including laboratory approach
Research InstitutionSapporo Medical University

Principal Investigator

Aung Meijisoe  札幌医科大学, 医学部, 講師 (10749584)

Co-Investigator(Kenkyū-buntansha) 小林 宣道  札幌医科大学, 医学部, 教授 (80186759)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsグラム陽性球菌 / メチシリン耐性黄色ブドウ球菌 / 腸球菌 / リネゾリド耐性 / optrA / cfr / リネゾリド / 耐性 / MRSA / 分子疫学
Outline of Research at the Start

リネゾリド(linezolid)はMRSA、VRE等の感染症に有効な薬剤の一つとして世界的に広く使用されているが、近年新規耐性遺伝子(optrA、cfr)を獲得したリネゾリド耐性菌が世界各国で報告されている。本研究では、日本において各種臨床材料から分離されるMRSA、腸球菌等を対象として新規耐性遺伝子(optrA、cfr)の存在および分布状況を解析する。合わせてリネゾリド耐性菌の菌種、各種薬剤感受性、病原因子の分布のほか、疾患・患者属性等の情報、遺伝子型、薬剤耐性の分子機序およびゲノム解析による分子疫学的情報をもとに、耐性菌株の特徴と耐性の機序を明らかにする。

Outline of Final Research Achievements

Linezolid is one of the antimicrobials used to treat infection with drug-resistant Gram-positive bacteria such as methicillin-resistant Staphylococcus aureus. In this study, we investigated the distribution of linezolid-resistant bacteria and resistance genes in Hokkaido. As a result, one isolate of enterococcus non-susceptible to linezolid was detected. This isolate had the resistance gene optrA and was genetically similar to previously reported Asian strains. Although linezolid resistance was not detected in Staphylococcus, there were differences in susceptibility to linezolid depending on the bacterial species/lineages. Some lineages of Staphylococcus aureus and some species of coagulase-negative staphylococci showed a tendency toward decreased susceptibility.

Academic Significance and Societal Importance of the Research Achievements

感染症の原因となる細菌の薬剤耐性は、人々の健康に対する重大な懸念であり、世界的な公衆衛生課題として認識されている。代表的な薬剤耐性菌にはメチシリン耐性黄色ブドウ球菌(MRSA)をはじめとするグラム陽性菌というグループに属する一群がある。リネゾリドはそれらに対する効果的な治療薬として用いられているが、近年それらに対する耐性菌や耐性機序が世界的に報告されている。本研究では、日本におけるグラム陽性菌のリネゾリド耐性の状況を明らかにすることで、今後の薬剤耐性菌対策の基礎資料として用いられることが期待される。

Report

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

    (14 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] Mymensingh Medical College(バングラデシュ)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Genetic characterization of methicillin-resistant / susceptible Staphylococcus aureus (MRSA/MSSA) and Staphylococcus argenteus clinical isolates in Bangladesh: dominance of ST6-MRSA-IV/t304 and detection of cfr/fexA in ST8-MSSA/t008.2024

    • Author(s)
      Roy S, Aung MS, Paul SK, Nasreen SA, Haque N, Mazid R, Khan MS, Barman TK, Arafa P, Sathi FA, Nila SS, Jahan A, Urushibara N, Kawaguchiya M, Ohashi N, Kobayashi N
    • Journal Title

      IJID Regions

      Volume: 10 Pages: 132-139

    • DOI

      10.1016/j.ijregi.2023.12.006

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Antimicrobial Resistance, Virulence Factors, and Genotypes of Enterococcus faecalis and Enterococcus faecium Clinical Isolates in Northern Japan: Identification of optrA in ST480 E. faecalis.2023

    • Author(s)
      Aung MS, Urushibara N, Kawaguchiya M, Ohashi N, Hirose M, Kudo K, Tsukamoto N, Ito M, Kobayashi N
    • Journal Title

      Antibiotics

      Volume: 12 Issue: 1 Pages: 108-108

    • DOI

      10.3390/antibiotics12010108

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clonal diversity and molecular characteristics of methicillin-susceptible and -resistant Staphylococcus aureus from pediatric patients in Myanmar.2022

    • Author(s)
      Aung MS, San T, Urushibara N, San N, Hlaing MS, Soe PE, Htut WHW, Moe I, Mon WLY, Chan ZCN, Kobayashi N.
    • Journal Title

      Microbial Drug Resistance

      Volume: 28 Issue: 2 Pages: 191-198

    • DOI

      10.1089/mdr.2021.0051

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Antimicrobial Resistance and Molecular Epidemiological Characteristics of Methicillin-Resistant and Susceptible Staphylococcal Isolates from Oral Cavity of Dental Patients and Staff in Northern Japan.2021

    • Author(s)
      Hirose M, Aung MS, Fukuda A, Yahata S, Fujita Y, Saitoh M, Hirose Y, Urushibara N, Kobayashi N.
    • Journal Title

      Antibiotics 10: 1316-1330, 2021.

      Volume: 10 Issue: 11 Pages: 1316-1330

    • DOI

      10.3390/antibiotics10111316

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clonal diversity of methicillin-resistant Staphylococcus aureus (MRSA) from bloodstream infections in northern Japan : identification of spermidine N-acetyltransferase gene (speG) in staphylococcal cassette chromosomes (SCCs) associated with type II and IV SCCmec2021

    • Author(s)
      Aung MS, Urushibara N, Kawaguchiya M, Hirose M, Ito M, Habadera S, Kobayashi N
    • Journal Title

      J Glob Antimicrob Resist

      Volume: 21 Pages: 207-214

    • DOI

      10.1016/j.jgar.2020.12.008

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ミャンマーにおける黄色ブドウ球菌の分子疫学的解析2024

    • Author(s)
      アウン メイジソウ、小林宣道、チョウ ウィンカラヤ、サン ティダ
    • Organizer
      第94回日本衛生学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 北海道における血流感染症由来MRSAの分子疫学的解析2024

    • Author(s)
      小林宣道、アウン メイジソウ、漆原範子、川口谷充代、大橋伸英、荒木蕗羽、松原加奈、伊藤政彦
    • Organizer
      第94回日本衛生学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Molecular epidemiology of Staphylococcus aureus, Staphylococcus argenteus, and coagulase negative staphylococci colonizing healthy adults in northern Japan2023

    • Author(s)
      Meiji Soe Aung、漆原範子、川口谷充代、大橋 伸英、 廣瀬 弥奈、小林宣道
    • Organizer
      第88回日本細菌学会北海道支部学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] バングラデシュにおける腸球菌 Enterococcus faecalis の薬剤耐性と分子疫学的特徴2023

    • Author(s)
      小林宣道、ロイ サンジュクタ、アウンメイジソウ、漆原範子、川口谷充代
    • Organizer
      第93回日本衛生学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] 市販鶏・豚肉より分離されたブドウ球菌属細菌の性状解析2023

    • Author(s)
      漆原範子、アウンメイジソウ、川口谷充代、大橋伸英、小林宣道
    • Organizer
      第93回日本衛生学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] ペースメーカー関連菌血症患者から分離されたバンコマイシン中等度耐性 MRSA のゲノム解析2023

    • Author(s)
      漆原範子、Meiji Soe Aung、川口谷充代、小林宣道
    • Organizer
      第96回日本細菌学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] Molecular epidemiology of Methicillin-resistant Staphylococcus aureus and Staphylococcus argenteus clinical isolates in Japan.2022

    • Author(s)
      Meiji Soe Aung
    • Organizer
      26th Congress of the Latin American Federation of Parasitology, 15th Central American and Caribbean Congress of Parasitology and Tropical Medicine
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 北日本における血流感染由来MRSAの分子疫学.2022

    • Author(s)
      アウン メイジソウ、漆原範子、川口谷充代、伊藤政彦、幅寺敏、廣瀬弥奈、小林宣道.
    • Organizer
      第95回日本細菌学会総会
    • Related Report
      2021 Research-status Report

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

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