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Development of enzyme-loaded fillers with the ability to control oral biofilm and their application to restorative materials

Research Project

Project/Area Number 21K09892
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57030:Conservative dentistry-related
Research InstitutionOsaka University

Principal Investigator

Kohno Tomoki  大阪大学, 大学院歯学研究科, 招へい教員 (10839202)

Co-Investigator(Kenkyū-buntansha) 北川 晴朗  大阪大学, 大学院歯学研究科, 助教 (50736246)
壷井 莉理子  大阪大学, 大学院歯学研究科, 特任助教(常勤) (20827430)
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: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsバイオフィルム / 酵素 / フィラー / 歯科材料 / 菌体外多糖
Outline of Research at the Start

本研究では、材質や粒径の異なる4種のフィラーに、各種反応性官能基を用いてデキストラナーゼまたはフルクタナーゼを固定化し、フィラーに担持された酵素活性を評価することで、各酵素の担持に適したフィラーおよび反応性官能基の種類および組み合わせを検証する。さらに、確定した条件で作製した各酵素担持フィラーをコンポジットレジンやグラスアイオノマーセメントに配合し、各試料表面でのバイオフィルム形成抑制効果を検証することで、口腔バイオフィルム制御能を備えた酵素担持フィラーの開発と修復材料への応用を目指す。

Outline of Final Research Achievements

In this study, we aimed to develop a novel filler loaded with dextranase and fructanase that degrade extracellular polysaccharides in oral biofilms and establish a biofilm control technology applicable to restorative materials. As a result, it was found that the enzymes dextranase and fructanase could be immobilized on the surface of a silica-based porous filler while maintaining their activity by reacting the filler with 3-aminopropyltriethoxysilane and modifying it with glutaraldehyde to introduce aldehyde groups. However, since the anti-biofilm effect was not observed on the surface of the resin-based coating material containing the enzyme-carrying filler, it suggested the need to immobilize a higher concentration of the enzymes on the filler surface.

Academic Significance and Societal Importance of the Research Achievements

固定化酵素は、一般的な化学触媒とは異なり、常温・常圧の条件下での反応性が高く、効率的で作用特異性の高い触媒として食品や繊維、医薬品製造などの工業化学の分野で応用されている。一方で、抗バイオフィルム効果の発現を目的とした各種酵素を担持させたフィラーの開発やそれを歯科修復材料に応用する試みはこれまで報告されていない。本研究により、デキストラナーゼやフルクタナーゼといったバイオフィルムの菌体外多糖を分解する酵素をフィラー表面に固定化する技術の確立に成功した。今後、これらの酵素を高濃度で固定化する手法を検討することで、臨床的に有用な口腔バイオフィルム制御技術の確立が期待できる。

Report

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

    (8 results)

All 2024 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Development of antibacterial resin composites incorporating poly(METAC) clusters2024

    • Author(s)
      Kohno T、Kitagawa H、Tsuboi R、Deng F、Sakai H、Wu T、Fan YS、Xiao L、Imazato S
    • Journal Title

      Materials

      Volume: 17 Issue: 4 Pages: 896-896

    • DOI

      10.3390/ma17040896

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fabrication of pH-Responsive Zn2+-Releasing Glass Particles for Smart Antibacterial Restoratives2022

    • Author(s)
      Deng Fan、Sakai Hirohiko、Kitagawa Haruaki、Kohno Tomoki、Thongthai Pasiree、Liu Yuhan、Kitagawa Ranna、Abe Gabriela L.、Sasaki Jun-ichi、Imazato Satoshi
    • Journal Title

      Molecules

      Volume: 27 Issue: 21 Pages: 7202-7202

    • DOI

      10.3390/molecules27217202

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Establishment of novel in vitro culture system with the ability to reproduce oral biofilm formation on dental materials2021

    • Author(s)
      Kohno Tomoki、Kitagawa Haruaki、Tsuboi Ririko、Nishimura Yuma、Imazato Satoshi
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 21188-21188

    • DOI

      10.1038/s41598-021-00803-8

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Development of antibacterial coating resins incorporating poly(METAC)2023

    • Author(s)
      Kohno Tomoki, Kitagawa Haruaki, Muraoka Riho, Imazato Satoshi
    • Organizer
      2023 IADR/LAR General Session & Exhibition with WCPD
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of long-term antibacterial effects of resin composite incorporating poly(METAC)2022

    • Author(s)
      Kohno Tomoki, Kitagawa Haruaki, Tsuboi Ririko, Deng Fan, Sakai Hirohiko, Imazato Satoshi
    • Organizer
      2022 IADR/APR General Session & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characterization of a strontium-releasing phosphate-based bioactive glass for bone regeneration2022

    • Author(s)
      Sakai Hirohiko, Deng Fan, Sasaki Jun-Ichi, Kitagawa Haruaki, Kohno Tomoki, Abe Gabriela, Xiao Linghao, Imazato Satoshi
    • Organizer
      International Dental Materials Congress 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fabrication of a lithium-releasing phosphate-based bioactive glass2022

    • Author(s)
      Abe Gabriela, Sakai Hirohiko, Kitagawa Haruaki, Kohno Tomoki, Xiao Linghao, Sasaki Jun-Ichi, Imazato Satoshi
    • Organizer
      International Dental Materials Congress 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of antibacterial resin composites containing a QAC-based monomer METAC2021

    • Author(s)
      Kohno T, Tsuboi R, Kitagawa H, Imazato S
    • Organizer
      ADM Virtual meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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