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Bio-imaging reveals mechanisms of host-dependent pathogenicity of zoonotic bacteria

Research Project

Project/Area Number 21H02727
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionTohoku University

Principal Investigator

Nakamura Shuichi  東北大学, 工学研究科, 准教授 (90580308)

Co-Investigator(Kenkyū-buntansha) 小泉 信夫  国立感染症研究所, 細菌第一部, 主任研究官 (10333361)
加藤 貴之  大阪大学, 蛋白質研究所, 教授 (20423155)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2023: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Keywordsスピロヘータ / 運動性 / レプトスピラ / 宿主選好性 / 病原性 / 人獣共通感染症 / 機械学習 / レプトスピラ症 / イメージング / 細菌 / 細菌べん毛 / 宿主特異性 / 細菌運動
Outline of Research at the Start

人獣共通感染症レプトスピラ症を題材に,細菌の病原性および宿主選好性を規定する因子を分子レベルで明らかにする。本症の病原体であるレプトスピラは様々な哺乳動物に感染するが,血清型と動物種の組み合わせによって症状は大きく異なる。本研究では,細菌の物性や動態を非病原性株および遺伝子破壊株と比較することにより病原因子を明らかにする。細菌感染で惹起される炎症性サイトカインの発現変動と重症度の関係を様々な細菌血清型-宿主種ペアで調べ,宿主選好性に関わる分子を同定する。最先端のバイオイメージング技術で細菌感染の現場を「観て測る」ことを研究の機軸として宿主-病原体相互作用の多様性と普遍性の理解につなげる。

Outline of Final Research Achievements

Leptospirosis is a worldwide zoonosis caused by the pathogenic Leptospira spp. The severity of the disease differs for the combination of the leptospiral strains and host species. We measured the dynamics of various leptospiral strains over the cultured kidney cells using machine-learning-based image analysis. Our results showed that fast crawling motility on kidney cells tends to result in severe symptoms. We also analyzed the crawling of mutant strains lacking outer membrane proteins (OMPs). The behavior of clinical isolates and OMP-deficient mutants showed the inverse correlation between adhesion and mobility, which could affect infection outcomes. Our computer vision technique eliminated the restriction on available bacterial strains and provided information that could help understand the mechanisms underlying motility-dependent bacterial pathogenicity.

Academic Significance and Societal Importance of the Research Achievements

本研究は,病原体の運動特性や付着性と病気の重症度を結び付け点,人獣共通感染症において重要な病原体の宿主選好性解明の手掛かりを示した点で,感染症研究としての大きな意義がある。本研究で発見した宿主細胞表面での病原体挙動に関する知見は,ユニバーサルワクチンの開発等,新しい治療・予防法の開発への貢献が期待されるものである。これに加えて,感染症研究におけるコンピュータービジョン技術の有用性を示すものであり,医学・生命科学分野と情報科学の双方の発展に寄与する。

Report

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

    (16 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (12 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results)

  • [Journal Article] It’s not all about flagella? Sticky invasion by pathogenic spirochetes2024

    • Author(s)
      Strnad Martin、Koizumi Nobuo、Nakamura Shuichi、Vancov Marie、Rego Ryan O.M.
    • Journal Title

      Trends in Parasitology

      Volume: - Issue: 5 Pages: 378-385

    • DOI

      10.1016/j.pt.2024.03.004

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Frontiers of microbial movement research2023

    • Author(s)
      Minamino Tohru、Nakane Daisuke、Nakamura Shuichi、Kiyama Hana、Morimoto Yusuke V.、Miyata Makoto
    • Journal Title

      Biophysics and Physicobiology

      Volume: 20 Issue: 3 Pages: n/a

    • DOI

      10.2142/biophysico.bppb-v20.0033

    • ISSN
      2189-4779
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Machine learning-based motion tracking reveals an inverse correlation between adhesivity and surface motility of the leptospirosis spirochete2023

    • Author(s)
      Abe Keigo、Koizumi Nobuo、Nakamura Shuichi
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 7703-7703

    • DOI

      10.1038/s41467-023-43366-0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Light dependent synthesis of a nucleotide second messenger controls the motility of a spirochete bacterium2022

    • Author(s)
      Xu Jun、Koizumi Nobuo、Morimoto Yusuke V.、Ozuru Ryo、Masuzawa Toshiyuki、Nakamura Shuichi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 6825-6825

    • DOI

      10.1038/s41598-022-10556-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Inverse correlation between adhesivity and crawling motility in Leptospira interrogans2024

    • Author(s)
      Shuichi Nakamura
    • Organizer
      Biology of Spirochetes, Gordon Research Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mechanism and biological significance of flagella-dependent bacterial motility2024

    • Author(s)
      Shuichi Nakamura
    • Organizer
      Active matter 2024
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] レプトスピラ症病原体の培養腎臓細胞に対する接着性と運動性の反相関関係2023

    • Author(s)
      阿部圭吾、小泉信夫、中村修一
    • Organizer
      第75回日本細菌学会東北支部総会・学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 培養腎臓細胞に対するレプトスピラの接着性とクロウリング運動の反相関関係2023

    • Author(s)
      阿部圭吾、小泉信夫、中村修一
    • Organizer
      第59回レプトスピラ・シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] レプトスピラ症の重症度と病原体の接着性・運動性・形態の関係2023

    • Author(s)
      中村修一,阿部圭吾,宇川聡一,高部響介,小泉信夫
    • Organizer
      グローバルヘルス合同大会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Biophysics of spirochetes2023

    • Author(s)
      Shuichi Nakamura
    • Organizer
      第61回日本生物物理学会年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Exploring Bacterial Flagella and Motility with Biophysical Approaches2023

    • Author(s)
      Shuichi Nakamura
    • Organizer
      IEEE-NANOMED 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 腎臓細胞上におけるスピロヘータの接着と運動の反相関関係2023

    • Author(s)
      阿部圭吾,小泉信夫,中村修一
    • Organizer
      2022年度べん毛研究交流会
    • Related Report
      2022 Annual Research Report
  • [Presentation] How fast? How flexible? Numbers gain our interest in bacteriology2023

    • Author(s)
      Shuichi Nakamura
    • Organizer
      第96回日本細菌学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of the outer membrane (OM) molecules on the motility, physical property, and pathogenicity of Leptospira2022

    • Author(s)
      Keigo Abe, Nobuo Koizumi, Shuichi Nakamura
    • Organizer
      第60回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Flagella-driven motility of bacteria2022

    • Author(s)
      Shuichi Nakamura
    • Organizer
      2022年度日本細菌学会関東支部インターラボセミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 背景分離法を利用した培養腎臓細胞上でのレプトスピラの運動解析2022

    • Author(s)
      阿部圭吾,小泉信夫,中村修一
    • Organizer
      第58回レプトスピラ・シンポジウム
    • Related Report
      2021 Annual Research Report

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

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