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Research for comprehensive antibiotic resistance mechanism in urinary tract infection

Research Project

Project/Area Number 19K09670
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56030:Urology-related
Research InstitutionKobe University

Principal Investigator

Shigemura Katsumi  神戸大学, 保健学研究科, 准教授 (00457102)

Co-Investigator(Kenkyū-buntansha) 大澤 佳代  神戸常盤大学, 保健科学部, 教授 (50324942)
宮良 高維  神戸大学, 医学部附属病院, 特命教授 (50368304)
白川 利朗  神戸大学, 科学技術イノベーション研究科, 教授 (70335446)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords尿路感染症 / 薬剤耐性菌
Outline of Research at the Start

本研究では主にカルバペネムなど多剤耐性腸内細菌科細菌や非発酵菌について、染色体性のみならずプラスミド性も含めた網羅的な耐性機構ならびに耐性遺伝子伝播形式の研究を行う。さらに日本国内のみならず、他のアジア諸国も含めた薬剤耐性細菌の出現、院内感染の状況ならびに抗菌薬投与歴などの患者背景因子との関連を解析することにより、各国間の耐性菌伝播様式の相違点を見極め、各国における効果的な分子疫学対策手法・感染制御対策の確立を目指す。

Outline of Final Research Achievements

Escherichia coli and Klebsiella pneumoniae, resistant to the broad-spectrum antimicrobials that carbapenems, cephems and quinolones, were investigated and differences in their characteristics from existing resistant strains were reported. In particular, a new resistance trend was found in the survey of carbapenem-resistant E. coli. In Japanese carbapenem-resistant bacteria, the production of IMP-6, a drug- hydrolyzing enzyme, is considered to be the main mechanism of resistance. But in this study, we found that changes in outer membrane permeability overlap with IMP-6 production, and are involved in advanced resistance. We also analysed the molecular epidemiological characteristics of K. pneumoniae isolated in Japan that showed both high virulence and resistance to cephems, and the high rate of quinolone resistance among K. pneumoniae isolated in Indonesia.

Academic Significance and Societal Importance of the Research Achievements

IMP-6産生株における外膜透過性変化の、カルバペネム耐性への寄与を報告したのは本研究が初めてであり、この結果はAntibiotics. (2022) に掲載された。また近年検出が増加している、高い病原性を保持しながら薬剤耐性を示す肺炎桿菌では、非病原性の株と比較して高度な薬剤耐性をもち、その危険性が示された。加えてインドネシアの肺炎桿菌を解析した結果、本邦の同種菌と比較してキノロン系抗菌薬への高い耐性率を保有しており、その動向をモニタリングする必要性を示された。これらの研究結果は今後の耐性菌対策、治療薬の開発への貢献が期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 Other

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

  • [Int'l Joint Research] アイルランガ大学/ガジャマダ大学(インドネシア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 台北医学大学(台湾)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] アイルランガ大学(インドネシア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 台北医学大学(その他の国・地域)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Differential effects of chromosome and plasmid bla<sub>CTX-M-15</sub> genes on antibiotic susceptibilities in extended-spectrum beta-lactamase-producing Escherichia coli isolates from patients with urinary tract infection2021

    • Author(s)
      Yang Young‐min、Osawa Kayo、Kitagawa Koichi、Hosoya Samiko、Onishi Reo、Ishii Aya、Shirakawa Toshiro、Hirai Itaru、Kuntaman Kuntaman、Tanimoto Hiroshi、Shigemura Katsumi、Fujisawa Masato
    • Journal Title

      International Journal of Urology

      Volume: 28 Issue: 6 Pages: 623

    • DOI

      10.1111/iju.14498

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Antimicrobial Resistance Characteristics of Imipenem-Non-Susceptible, Imipenemase-6-Producing Escherichia coli2021

    • Author(s)
      Onishi Reo、Shigemura Katsumi、Osawa Kayo、Yang Young-Min、Maeda Koki、Fang Shiuh-Bin、Sung Shian-Ying、Onuma Kenichiro、Uda Atsushi、Miyara Takayuki、Fujisawa Masato
    • Journal Title

      Antibiotics

      Volume: 11 Issue: 1 Pages: 32-32

    • DOI

      10.3390/antibiotics11010032

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Genetic analysis of ESBL-producing Klebsiella pneumoniae isolated from UTI patients in Indonesia2021

    • Author(s)
      Yamasaki Saya、Shigemura Katsumi、Osawa Kayo、Kitagawa Koichi、Ishii Aya、Kuntaman K.、Shirakawa Toshiro、Miyara Takayuki、Fujisawa Masato
    • Journal Title

      Journal of Infection and Chemotherapy

      Volume: 27 Issue: 1 Pages: 55

    • DOI

      10.1016/j.jiac.2020.08.007

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 基質拡張型βラクタマーゼ産生過粘稠性Klebsiella pneumoniaeの薬剤感受性と遺伝子解析2021

    • Author(s)
      谷本啓、重村克巳、大澤 佳代、北川孝一、大西玲於、梁英敏、前田光毅、三浦真希子、宮良高維、中野雄造、藤澤正人
    • Organizer
      第69回日本化学療法学会西日本支部総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] メロペネム耐性Escherichia coliの遺伝子解析2021

    • Author(s)
      大西玲於、重村克巳、大澤佳代、北川孝一、谷本啓、梁英敏、前田光毅、三浦真希子、大沼健一郎、宮良高維、中野雄造、藤澤正人
    • Organizer
      第69回日本化学療法学会西日本支部総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] インドネシア尿路感染症患者より検出されたCTX-M-15型ESBL産生E.coliの染色体性もしくはプラスミド性における薬剤感受性の比較2020

    • Author(s)
      細谷 砂美子, 重村 克巳, 宮良 高維, 北川 孝一, 中西 典子, 木下 承晧, 大澤 佳代, Kuntaman Kuntaman, 白川 利朗, 藤澤 正人
    • Organizer
      第68回日本化学療法学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Acquisition of antimicrobial-resistant variants in repeated infections caused by Pseudomonas aeruginosa2020

    • Author(s)
      Kayo Osawa, Noriko Nakanishi, Mari Kusuki, Katsumi Shigemura, Takayuki Miyara
    • Organizer
      第94回日本感染症学会総会・学術講演会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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