• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Role of host polyamines in Salmonella pathogenesis

Research Project

Project/Area Number 21K07011
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Okada Nobuhiko  北里大学, 薬学部, 教授 (80194364)

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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsポリアミン / サルモネラ / マウス感染モデル / 病原因子 / 病原性 / 感染性 / 遺伝子発現 / 細菌
Outline of Research at the Start

サルモネラは我が国における主要な食中毒の原因菌であり、本感染症に対する新たな制御法の開発が必要とされている。一方、ポリアミンは2つ以上のアミノ基をもつ低分子の炭化水素であり、細菌の遺伝子発現レベルに影響を及ぼす。そこで、本研究ではポリアミンによるサルモネラ下痢症の新たな制御法の開発を目的とし、その可能性を探るため、サルモネラ感染におけるポリアミンの役割の解明を目指す。

Outline of Final Research Achievements

Polyamines are aliphatic polycations that are ubiquitous in almost all living organisms, including animals and microbes. Earlier studies have demonstrated that, in addition to pivotal physiological functions, polyamines are also involved in multiple aspects of bacterial pathogenesis. Salmonella enterica serovar Typhimurium is an entero- and intracellular-pathogenic bacterium causing life-threatening infections ranging from gastroenteritis to systemic infection. Polyamines have been reported to contribute to S. Typhimurium pathogenesis, however, the role of polyamines is not fully understood. In this study, we clarify that S. Typhimurium utilizes the polyamines of its hosts in order to infect them. Polyamine homeostasis in S. Typhimirum is required for functional expression of virulence factors. These results also suggest that controlling the host polyamine levels could be a promising avenue for treatment of Salmonella infection.

Academic Significance and Societal Importance of the Research Achievements

病原細菌サルモネラの病原性発現に関わるポリアミン恒常性は宿主からの取り込みに依存しており、エフロルニチン(ジフルオロメチルオルニチン)による宿主ポリアミンの阻害はサルモネラの感染性を抑制した。エフロルニチンはアフリカ睡眠病の治療薬として用いられている承認された薬剤であることから、本研究結果はその適応をサルモネラ感染に拡大する可能性を示唆した。さらに、ポリアミンよる病原因子の制御機構が明らかにすることは、ポリアミンおよびそれに関連した分子をターゲットとした新たな抗菌薬(抗感染症薬)の開発における分子基盤になると期待される。

Report

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

    (5 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Possible link between colonization of the gastrointestinal tract by <i>Citrobacter rodentium</i> in C57BL/6 mice and microbiota composition2024

    • Author(s)
      Miki Tsuyoshi、Haneda Takeshi、Okada Nobuhiko、Ito Masahiro
    • Journal Title

      Microbiology and Immunology

      Volume: na Issue: 6 Pages: 206-211

    • DOI

      10.1111/1348-0421.13128

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The CpxRA two-component system of adherent and invasive <i>Escherichia coli</i> contributes to epithelial cell invasion and early-stage intestinal fitness in a dysbiotic mouse model mediated by type 1 fimbriae expression2024

    • Author(s)
      Miki Tsuyoshi、Ito Masahiro、Okada Nobuhiko、Haneda Takeshi
    • Journal Title

      Infection and Immunity

      Volume: na Issue: 6

    • DOI

      10.1128/iai.00132-24

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fatty acid homeostasis tunes flagellar motility by activating phase 2 flagellin expression, contributing to Salmonella gut colonization2022

    • Author(s)
      Yusuke Hoshino, Taro Sakamoto, Naoki Sudo, Masahiro Ito, Takeshi Haneda, Nobuhiko Okada, Tsuyoshi Miki
    • Journal Title

      Infection and Immunity

      Volume: 90 (7) Issue: 7

    • DOI

      10.1128/iai.00184-22

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] <i>uvrY<I> Deletion and Acetate Reduce Gut Colonization of Crohn’s Disease-Associated Adherent-Invasive Escherichia coli by Decreasing Expression of Type 1 Fimbriae2022

    • Author(s)
      Miki Tsuyoshi、Hoshino Yusuke、Sudo Naoki、Ito Masahiro、Haneda Takeshi、Okada Nobuhiko
    • Journal Title

      Infection and Immunity

      Volume: 90 Issue: 3

    • DOI

      10.1128/iai.00662-21

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Fatty acid homeostasis tubes flagellar motility, contributing to Salmonella gut colonization2023

    • Author(s)
      Tsuyoshi Miki, Yusuke Hoshino, Taro Sakamoto, Naoki Sudo, Masahiro Ito, Takeshi Haneda, Nobuhiko Okada
    • Organizer
      日本細菌学会総会
    • Related Report
      2022 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi