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Development of quorum sensing inhibition technology by capturing autoinducing peptides of gram-positive bacteria

Research Project

Project/Area Number 18K04844
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 27040:Biofunction and bioprocess engineering-related
Research InstitutionUtsunomiya University

Principal Investigator

Kato Norihiro  宇都宮大学, 工学部, 教授 (00261818)

Co-Investigator(Kenkyū-buntansha) 奈須野 恵理  宇都宮大学, 工学部, 助教 (80709329)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsクオラムセンシング / 自己誘導ペプチド / 機能性高分子 / グラム陽性細菌 / 水晶振動子マイクロバランス法 / 細胞間情報伝達機構 / シクロデキストリン / 高分子ミクロスフェア
Outline of Final Research Achievements

Autoinducing peptides secreted by gram-positive bacteria activate the expression of target genes. This project proposed an extracellular inhibition method for this intercellular signaling system called quorum sensing. Staphylococcus aureus and Streptococcus mutans were studied as the model bacteria that produce cyclic- and straight-chain peptides as quorum sensing signals. The virulence factor expression involved in quorum sensing was effectively inhibited by forming a complex between autoinducing peptide and the molecule added extracellularly. The relationship between the added inhibitor and pathogenicity expression level was quantitatively determined by the quartz crystal microbalance method.

Academic Significance and Societal Importance of the Research Achievements

細菌による病原性因子の発現に伴う感染症の発症、水と接触する固体表面に形成するバイオフィルムの形成過程などに、細胞間情報伝達機構であるクオラムセンシング機構の関与が多く報告されている。物理的な相互作用に起因する固体表面への細菌の初期付着を抑制することは難しいことから、本研究では関連遺伝子の発現を細胞外部から遠隔操作し病原性を封じ込める手法を着想し、その効果を実証した。試験した黄色ブドウ球菌は薬剤耐性遺伝子を有する例も多く病原性の封じ込め技術は重要となる。ミュータンス連鎖球菌は口腔内でう蝕を誘導することからバイオフィルムの形成阻害、病原性の封じ込めの技術は良好な口腔衛生状態の維持に寄与する。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (6 results)

All 2020 2019 2018

All Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Staphylococcus aureusのクオラムセンシングに依存した病原性発現に対する酸性多糖ゲルの抑制効果2020

    • Author(s)
      稲垣瑠妃、織茂裕太、奈須野恵理、加藤紀弘
    • Organizer
      第30回日本MRS年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ミュータンス連鎖球菌の膜受容体とクオラムセンシング阻害剤γ-シクロデキストリンのQCM相互作用解析2020

    • Author(s)
      稲葉香乃、圓通賢隆、坂井稜平、奈須野恵理、加藤紀弘
    • Organizer
      第30回日本MRS年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] シクロデキストリンを用いたヒドロゲル表面のSwarming運動性制御2020

    • Author(s)
      山口瑞稀、清水あかり、高山友理子、奈須野恵理、加藤紀弘
    • Organizer
      第30回日本MRS年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Interaction Analysis of a Quorum Sensing Signal in Streptococcus mutans with Polymer Assemblies Using a Quartz Crystal Microbalance2019

    • Author(s)
      Ryohei Sakai, Kota Sawaguchi, Yuriko Takayama, Eri Nasuno, and Norihiro Kato
    • Organizer
      Federation of Asian Polymer Societies Polymer Congress, Polymers for Cutting-Edge Technological Innovations (FAPS2019 Polymer Congress)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Inhibitory Effects of Pectin Gel for Hemolysis Activity in Staphylococcus aureus2019

    • Author(s)
      Tsukasa Hirose, Yuta Orimo, Ryohei Sakai, Yuriko Takayama, Eri Nasuno, and Norihiro Kato
    • Organizer
      Federation of Asian Polymer Societies Polymer Congress, Polymers for Cutting-Edge Technological Innovations (FAPS2019 Polymer Congress)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ポリビニルアルコール会合体を用いるStaphylococcus aureusの病原性抑制2018

    • Author(s)
      高山友理子、上村卓美、織茂裕太、奈須野恵理、加藤紀弘
    • Organizer
      第28回日本MRS年次大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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