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Development of novel therapies for bacterial infections by linking the host immune mechanism with the action of the bacterial flora.

Research Project

Project/Area Number 20K08842
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54030:Infectious disease medicine-related
Research InstitutionYamaguchi University (2023)
Nagasaki University (2020-2022)

Principal Investigator

Sakamorto Kei  山口大学, 大学院医学系研究科, 教授 (10528300)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords細菌感染 / 敗血症 / 食中毒 / 病原因子 / インフラマソーム / 細菌叢 / 宿主免疫 / 免疫 / 感染症
Outline of Research at the Start

細菌の抗生物質への耐性獲得の早さと薬剤耐性菌の拡散のスピードは驚異的である。この問題に対処するためには、現在ほとんど抗生物質に依存している細菌感染症の治療法を変革する必要がある。そこで本研究では、抗生物質を使用しない、新規の抗菌療法の開発を行う。
本研究では宿主の免疫システムと腸内細菌叢による感染防御機能連携させた、感染症治療法を開発する。

Outline of Final Research Achievements

In this study, we sought to develop an antimicrobial-independent treatment for bacterial infections in order to increase treatment options for bacterial infections. Animal studies were conducted in mice and used Escherichia coli and its relatives Citrobacter rodentium, Klebsiella pneumoniae, and Staphylococcus aureus.
The Escherichia coli and Citrobacter rodentium infection models were primarily treated by oral administration of immunoglobulin. On the other hand, for Staphylococcus aureus infections, we developed an inflammasome-regulated therapy.
We also reported on the biological characteristics of the ST131 strain of E. coli.

Academic Significance and Societal Importance of the Research Achievements

抗菌薬に耐性をもつ細菌(薬剤耐性菌)による感染症が世界的に問題になっている。しかし細菌感染症に対する治療法は、抗菌薬に依存する他ないのが現状である。この状況を打開するため、抗菌薬非依存的な細菌感染に対する治療法を開発する必要に迫られている。
本研究はこの問題の解決を目指し、細菌や宿主の生物学的特性を利用した治療法の開発に取り組んだ。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (12 results) (of which Peer Reviewed: 11 results,  Open Access: 10 results) Presentation (5 results) (of which Invited: 2 results)

  • [Int'l Joint Research] University of Michigan(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Michigan(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Performance of the GeneSoC Rapid PCR System in Detection of SARS-CoV-2 from Saliva Specimens2023

    • Author(s)
      Ota Kenji、Kurahara Ryo、Tsukamoto Chie、Kawamoto Yasuhide、Akamatsu Norihiko、Sasaki Daisuke、Mitsumoto-Kaseida Fujiko、Sakamoto Kei、Kosai Kosuke、Hasegawa Hiroo、Yamamoto Kazuko、Izumikawa Koichi、Mukae Hiroshi、Yanagihara Katsunori
    • Journal Title

      Microbiology Spectrum

      Volume: 11 Issue: 2 Pages: 1-3

    • DOI

      10.1128/spectrum.03259-22

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Serological response to a third dose of SARS-CoV-2 vaccine according to previous infection history2023

    • Author(s)
      Ota Kenji、Murakami Satoshi、Ishihara Kaori、Sasaki Daisuke、Usui Tetsuya、Mitsumoto-Kaseida Fujiko、Sakamoto Ke、Mukae Hiroshi、Kohno Shigeru、Yanagihara Katsunori
    • Journal Title

      Vaccine: X

      Volume: 13 Pages: 100282-100282

    • DOI

      10.1016/j.jvacx.2023.100282

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] BioFire FilmArray Pneumonia Panel enhances detection of pathogens and antimicrobial resistance in lower respiratory tract specimens2022

    • Author(s)
      Kosai Kosuke、Akamatsu Norihiko、Ota Kenji、Mitsumoto-Kaseida Fujiko、Sakamoto Kei、Hasegawa Hiroo、Izumikawa Koichi、Mukae Hiroshi、Yanagihara Katsunori
    • Journal Title

      Annals of Clinical Microbiology and Antimicrobials

      Volume: 21 Issue: 1 Pages: 24-24

    • DOI

      10.1186/s12941-022-00512-8

    • Related Report
      2022 Research-status Report
  • [Journal Article] Escherichia coli ST131 isolated from urological patients can acquire plasmid-mediated extended spectrum β-lactamase from other bacteria with high frequency2022

    • Author(s)
      Kondo T, Sakamoto K, Morinaga Y, Miyata Y, Yanagihara K, Sakai H.
    • Journal Title

      Int J Urol.

      Volume: - Issue: 6 Pages: 587-594

    • DOI

      10.1111/iju.14845

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The surveillance of colistin resistance and mobilized colistin resistance genes in multidrug-resistant Enterobacteriaceae isolated in Japan.2022

    • Author(s)
      Kawamoto Y, Kaku N, Akamatsu N, Sakamoto K, Kosai K, Morinaga Y, Ohmagari N, Izumikawa K, Yamamoto Y, Mikamo H, Kaku M, Oishi K, Yanagihara K.
    • Journal Title

      Int J Antimicrob Agents.

      Volume: 59 Issue: 1 Pages: 106480-106480

    • DOI

      10.1016/j.ijantimicag.2021.106480

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Performance of anti-SARS-CoV-2 antibody testing in asymptomatic or mild COVID-19 patients: A retrospective study in outbreak on a cruise ship.2021

    • Author(s)
      Kaku N, Nishimura F, Shigeishi Y, Tachiki R, Sakai H, Sasaki D, Ota K, Sakamoto K, Kosai K, Hasegawa H, Izumikawa K, Ariyoshi K, Mukae H, Yasuda J, Morita K, Kohno S, Yanagihara K.
    • Journal Title

      PLoS One

      Volume: 16 Issue: 9 Pages: e0257452-e0257452

    • DOI

      10.1371/journal.pone.0257452

    • NAID

      120007178567

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rapid detection and surveillance of cfiA-positive Bacteroides fragilis using matrix-assisted laser desorption ionization time-of-flight mass spectrometry.2021

    • Author(s)
      Kawamoto Y, Kosai K, Ota K, Uno N, Sakamoto K, Hasegawa H, Izumikawa K, Mukae H, Yanagihara K.
    • Journal Title

      Anaerobe.

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of SARS-CoV-2 using qRT-PCR in saliva obtained from asymptomatic or mild COVID-19 patients, comparative analysis with matched nasopharyngeal samples.2021

    • Author(s)
      Ota K, Yanagihara K, Sasaki D, Kaku N, Uno N, Sakamoto K, Kosai K, Miyazaki T, Hasegawa H, Fujita A, Tashiro M, Tanaka T, Izumikawa K, Ariyoshi K, Mukae H, Yasuda J, Morita K, Kohno S.
    • Journal Title

      PLoS One.

      Volume: 16 Issue: 6 Pages: e0252964-e0252964

    • DOI

      10.1371/journal.pone.0252964

    • NAID

      120007168840

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Had COVID-19 spread in the community before the first confirmed case in Nagasaki, Japan?2021

    • Author(s)
      Kaku N, Ota K, Sasaki D, Akamatsu N, Uno N, Sakamoto K, Kosai K, Hasegawa H, Izumikawa K, Mukae H, Yanagihara K.
    • Journal Title

      Microbes Infect .

      Volume: - Issue: 4-5 Pages: 104812-104812

    • DOI

      10.1016/j.micinf.2021.104812

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of a novel rapid TRC assay for the detection of influenza using nasopharyngeal swabs and gargle samples2021

    • Author(s)
      Kaku N, Hashiguchi K, Akamatsu N, Wakigawa F, Matsuda J, Komaru K, Nakao T, Harada Y, Hara A, Uno N, Sakamoto K, Morinaga Y, Kitazaki T, Hasegawa H, Miyazaki T, Fukuda M, Izumikawa K, Mukae H, Yanagihara K.
    • Journal Title

      Eur J Clin Microbiol Infect Dis

      Volume: - Issue: 8 Pages: 1743-1748

    • DOI

      10.1007/s10096-021-04193-7

    • NAID

      120007000285

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A novel macrolide, solithromycin suppresses mucin overexpression induced by Pseudomonas aeruginosa LPS in airway epithelial cells2020

    • Author(s)
      Yasuhide Kawamoto , Yoshitomo Morinaga , Norihito Kaku , Naoki Uno , Kosuke Kosai , Kei Sakamoto , Hiroo Hasegawa , Katunori Yanagihara
    • Journal Title

      J Infect Chemother .

      Volume: 9 Issue: 9 Pages: 1008-1010

    • DOI

      10.1016/j.jiac.2020.06.014

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Methodology for Assessing Tumor Clonality of Adult T Cell Leukemia/Lymphoma2020

    • Author(s)
      Yamakawa T, Uno N, Sasaki D, Kaku N, Sakamoto K, Kosai K, Hasegawa H, Miyazaki Y, Yanagihara K.
    • Journal Title

      Mol Ther Methods Clin Dev.

      Volume: 19 Pages: 463-473

    • DOI

      10.1016/j.omtm.2020.10.015

    • NAID

      120006980751

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 抗菌薬非依存的な新規治療戦略によるMRSA感染症に対する実験的治療2022

    • Author(s)
      坂本啓
    • Organizer
      MRSAフォーラム
    • Related Report
      2022 Research-status Report
  • [Presentation] 黄色ブドウ球菌によるインフラマソーム 活性化の新規経路の発見と 治療標的としての可能性について2022

    • Author(s)
      坂本啓
    • Organizer
      感染症学会西日本学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] 嫌気性菌 ~体内の Majority 達~2022

    • Author(s)
      坂本啓
    • Organizer
      感染症学会西日本学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 黄色ブドウ球菌の感染によるインフラマソーム活性化の新経路の探索2021

    • Author(s)
      坂本 啓
    • Organizer
      日本感染症学会西日本地方会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 腸内細菌叢による感染防御機構~基礎研究から臨床応用まで~2020

    • Author(s)
      坂本 啓
    • Organizer
      第90回日本感染症学会西日本地方会学術集会・第63回日本感染症学会中日本地方会学術集会・第68回日本化学療法学会西日本支部総会
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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