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Mechanism of environmental response and micro-colony induction in uropathogenic E. coli

Research Project

Project/Area Number 19K07533
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionGunma University

Principal Investigator

Hirakawa Hidetada  群馬大学, 大学院医学系研究科, 准教授 (80431758)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords尿路感染症 / 薬剤耐性 / 病原性 / バイオフィルム / 環境応答 / 発現制御 / 抗菌薬
Outline of Research at the Start

尿路病原性大腸菌は、尿路感染症の最も主要な起因菌であり、治療には各種抗菌剤が用いられる。しかしながら近年は、薬剤耐性菌が増加傾向にあるため、本感染症に対する予防法や治療法の発展が期待されている。
本計画では、本菌の環境感知応答システムの解析を通して、感染部位における本菌の病原性発現の分子メカニズムについて明らかにすることを目指す。本研究により、尿路病原性大腸菌の病原性発現の条件や責任病原因子を同定することで、本菌による尿路感染症の難治化、慢性化予備軍のリスク予測や標的剤の設計、開発などに向けた応用研究への足掛かりとなる基盤を作製し、尿路感染症予防、治療法の発展に繋げたいと考えている。

Outline of Final Research Achievements

Urinary tract infection is one of the most common infectious diseases. Uropathogenic E. coli is a major pathogen that causes urinary tract infection, and it internalizes bladder and kidney epithelial cells. This bacterium colonizes within the host cells, which enables to establish and sustain the infection by evading from antimicrobial agents and host immune systems. In this study, we found that extracellular cytidine induces bacterial colonization and analyzed its mechanism. In addition, we found that the OmpX protein contributes to bacterial colonization.

Academic Significance and Societal Importance of the Research Achievements

尿路病原性大腸菌による感染症を治療するために、様々な抗菌薬が使用されているが、近年多くの既存の抗菌薬に対する耐性菌(薬剤耐性菌)が増加しており、本感染症に対する予防法や治療法の開発が期待されている。本研究成果は、尿路病原性大腸菌が病気を引き起こすメカニズムについてのさらなる理解に加えて、本菌による尿路感染症に対する治療法および、予防法の発展に貢献するものである。

Report

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

    (19 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] Instituto Mexicano del Seguro Social(メキシコ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Aix-Marseille University(フランス)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Roles of the Tol/Pal System in Bacterial Pathogenesis and Its Application to Antibacterial Therapy2022

    • Author(s)
      Hirakawa Hidetada、Suzue Kazutomo、Tomita Haruyoshi
    • Journal Title

      Vaccines

      Volume: 10 Issue: 3 Pages: 422-422

    • DOI

      10.3390/vaccines10030422

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elucidation of host diversity of the VanD-carrying genomic islands in enterococci and anaerobes2022

    • Author(s)
      Hashimoto Yusuke、Hisatsune Junzo、Suzuki Masato、Kurushima Jun、Nomura Takahiro、Hirakawa Hidetada、Kojima Naoko、Ono Yuichi、Hasegawa Yutaka、Tanimoto Koichi、Sugai Motoyuki、Tomita Haruyoshi
    • Journal Title

      JAC-Antimicrobial Resistance

      Volume: 4 Issue: 1 Pages: 189-189

    • DOI

      10.1093/jacamr/dlab189

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adsorption of Phenazines Produced by Pseudomonas aeruginosa Using AST-120 Decreases Pyocyanin-Associated Cytotoxicity2021

    • Author(s)
      Hirakawa Hidetada、Takita Ayako、Uchida Motoyuki、Kaneko Yuka、Kakishima Yuto、Tanimoto Koichi、Kamitani Wataru、Tomita Haruyoshi
    • Journal Title

      Antibiotics

      Volume: 10 Issue: 4 Pages: 434-434

    • DOI

      10.3390/antibiotics10040434

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Roles of OmpA in Type III Secretion System-Mediated Virulence of Enterohemorrhagic Escherichia coli2021

    • Author(s)
      Hirakawa Hidetada、Suzue Kazutomo、Takita Ayako、Tomita Haruyoshi
    • Journal Title

      Pathogens

      Volume: 10 Issue: 11 Pages: 1496-1496

    • DOI

      10.3390/pathogens10111496

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] cAMP Receptor Protein Positively Regulates the Expression of Genes Involved in the Biosynthesis of Klebsiella oxytoca Tilivalline Cytotoxin2021

    • Author(s)
      Rodr?guez-Valverde Diana、Le?n-Montes Nancy、Soria-Bustos Jorge、Mart?nez-Cruz Jessica、Gonz?lez-Ugalde Ricardo、Rivera-Guti?rrez Sandra、Gonz?lez-y-Merchand Jorge A.、Rosales-Reyes Roberto、Garc?a-Morales L?zaro、Hirakawa Hidetada、Fox James G.、Gir?n Jorge A.、De la Cruz Miguel A.、Ares Miguel A.
    • Journal Title

      Frontiers in Microbiology

      Volume: 12 Pages: 743594-743594

    • DOI

      10.3389/fmicb.2021.743594

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Roles of OmpX, an outer membrane protein on virulence and flagellar expression in uropathogenic Escherichia coli2021

    • Author(s)
      Hirakawa Hidetada、Suzue Kazutomo、Takita Ayako、Kamitani Wataru、Tomita Haruyoshi
    • Journal Title

      Infection and Immunity

      Volume: 89 Issue: 6

    • DOI

      10.1128/iai.00721-20

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Progress Overview of Bacterial Two-Component Regulatory Systems as Potential Targets for Antimicrobial Chemotherapy2020

    • Author(s)
      Hirakawa Hidetada、Kurushima Jun、Hashimoto Yusuke、Tomita Haruyoshi
    • Journal Title

      Antibiotics

      Volume: 9 Issue: 10 Pages: 635-635

    • DOI

      10.3390/antibiotics9100635

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Roles of the Tol-Pal system in the Type III secretion system and flagella-mediated virulence in enterohemorrhagic Escherichia coli2020

    • Author(s)
      Hirakawa Hidetada、Suzue Kazutomo、Takita Ayako、Awazu Chikako、Kurushima Jun、Tomita Haruyoshi
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 15173-15173

    • DOI

      10.1038/s41598-020-72412-w

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Roles of CytR, an anti-activator of cyclic-AMP receptor protein (CRP) on flagellar expression and virulence in uropathogenic Escherichia coli2020

    • Author(s)
      Hirakawa Hidetada、Takita Ayako、Kato Mao、Mizumoto Hanano、Tomita Haruyoshi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 521 Issue: 3 Pages: 555-561

    • DOI

      10.1016/j.bbrc.2019.10.165

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] マクロ孔吸着炭を利用した腸管出血性大腸菌の志賀毒素と3型分泌蛋白質の吸着および、病原性抑制2021

    • Author(s)
      平川秀忠、富田治芳
    • Organizer
      第68回日本化学療法学会東日本支部総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ROLES OF THE TOL/PAL SYSTEM ON THE PRODUCTION OF FLAGELLAR AND THE TYPE III SECRETION SYSTEM MACHINERY2021

    • Author(s)
      Hidetada Hirakawa
    • Organizer
      BACTERIAL LOCOMOTION AND SIGNAL TRANSDUCTION - BLAST
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 腸管出血性大腸菌(EHEC) O157の腸管病原性におけるTol/Palシステムの役割2020

    • Author(s)
      平川秀忠
    • Organizer
      第103回日本細菌学会関東支部総会 2020年10月
    • Related Report
      2020 Research-status Report
  • [Presentation] 腸管出血性大腸菌の病原性におけるTol-Palシステムの役割2020

    • Author(s)
      平川秀忠
    • Organizer
      第67回日本化学療法学会東日本支部総会
    • Related Report
      2020 Research-status Report
  • [Presentation] 腸管出血性大腸菌 (EHEC)の病原性因子Tol/Palシステムの解析2020

    • Author(s)
      平川秀忠
    • Organizer
      第34回日本バイオフィルム学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] バイオフィルムを標的とした薬剤耐性大腸菌感染症に対する新たな治療戦略 創出のためのアプローチ2019

    • Author(s)
      平川秀忠、富田治芳
    • Organizer
      第93回日本感染症学会総会・学術講演会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 尿路病原性大腸菌(UPEC)のマイクロコロニー形成と鞭毛発現抑制因子CytRの解析2019

    • Author(s)
      平川秀忠、富田治芳
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] 細胞外シチジンによる尿路病原性大腸菌のマイクロコロニー形成と鞭毛遺伝子発現誘導機構の解析2019

    • Author(s)
      平川秀忠、滝田綾子、富田治芳
    • Organizer
      第102回日本細菌学会関東支部総会
    • Related Report
      2019 Research-status Report

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

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