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Attempt to develop bio-targeting dental materials through the integration of materials science and molecular biology approaches

Research Project

Project/Area Number 21K19593
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 57:Oral science and related fields
Research InstitutionOsaka University

Principal Investigator

Imazato Satoshi  大阪大学, 大学院歯学研究科, 教授 (80243244)

Co-Investigator(Kenkyū-buntansha) 北川 晴朗  大阪大学, 大学院歯学研究科, 助教 (50736246)
Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords歯学 / 歯科材料学 / バイオフィルム / 細胞外DNA / バイオターゲティング
Outline of Research at the Start

本研究では、材料学的アプローチに分子生物学のエレメントを加え、バイオフィルム内の細胞外マトリックスに存在する細胞外DNAをターゲットとして、歯科材料へのバイオフィルム制御能の付与を試みる。すなわち、細胞外DNAを分解する酵素を薬剤徐放用キャリアであるポリマー粒子に担持させ、DNA分解酵素の徐放によるバイオフィルム抑制能を検討する。さらに、DNA分解酵素担持粒子を添加した歯科材料上でのバイオフィルム抑制効果を評価することで、細胞外マトリックスの制御により抗バイオフィルム効果を発現できる「バイオターゲティング歯科材料」の開発を目指す。

Outline of Final Research Achievements

Aiming to endow dental materials with biofilm control capabilities by targeting extracellular DNA (eDNA) in the extracellular matrix of oral biofilms, we successfully established a technology to achieve sustained release of DNA-degrading enzyme (DNase) by loading the DNase onto polyHEMA/TMPT particles. By incorporating these DNase-loaded particles into dental resins, it was demonstrated that the sustained release of DNase promoted the degradation of eDNA, effectively inhibiting the formation of oral biofilms on the surface of the dental resins.

Academic Significance and Societal Importance of the Research Achievements

口腔バイオフォルムの制御を目的として歯科材料への抗菌性付与に関する研究が国内外で盛んに行われている。これらの研究では、材料に含まれる抗菌成分が口腔細菌を攻撃し、材料表面への細菌の初期付着を抑制することを目指している。しかし、一旦細菌が材料に付着して細胞外マトリックスを形成すると、バイオフィルム内での抗菌成分の浸透や細菌との接触が妨げられ、抗菌効果が減弱することが課題である。本研究により、DNA分解酵素担持粒子を添加した歯科材料上でのバイオフィルム形成抑制効果を確認できたことで、細胞外マトリックスの制御により抗バイオフィルム効果を発揮する新たな歯科材料の開発が期待される。

Report

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

    (11 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results)

  • [Journal Article] Metal-doped silicate and phosphate glasses for antibacterial dental biomaterials2023

    • Author(s)
      Kitagawa H、Kohno T、Deng F、Abe GL、Sakai H、Fan YS、Wu T、Sasaki JI、Imazato S
    • Journal Title

      Biomaterial Investigations in Dentistry

      Volume: 10 Issue: 1 Pages: 2284372-2284372

    • DOI

      10.1080/26415275.2023.2284372

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the long-term antibiofilm effect of a surface coating with dual functionality of antibacterial and protein-repellent effects2022

    • Author(s)
      Thongthai P, Kitagawa H, Noree S, Iwasaki Y, Liu YH, Abe GL
    • Journal Title

      Dental Materials Journal

      Volume: 41 Issue: 2 Pages: 189-196

    • DOI

      10.4012/dmj.2021-205

    • NAID

      130008115590

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2022-03-25
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Development of endodontic sealers containing antimicrobial-loaded polymer particles with long-term antibacterial effects2021

    • Author(s)
      Kitagawa H、Kitagawa R、Tsuboi R、Hirose N、Thongthai P、Sakai H、Ueda M、Ono S、Sasaki JI、Ooya T、Imazato S
    • Journal Title

      Dental Materials

      Volume: 37 Issue: 8 Pages: 1248-1259

    • DOI

      10.1016/j.dental.2021.04.008

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Immobilizing bactericides on dental resins via electron beam irradiation2021

    • Author(s)
      Thongthai P、Kitagawa H、Iwasaki Y、Noree S、Kitagawa R、Imazato S
    • Journal Title

      Journal of Dental Research

      Volume: 100 Issue: 10 Pages: 1055-1062

    • DOI

      10.1177/00220345211026569

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Smart bio-active restorative materials - Designing the next-generation materials for restorative dentistry-2023

    • Author(s)
      Imazato S
    • Organizer
      7th International Congress on Adhesive Dentistry
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Bio-active restorative materials -What are they and their clinical benefits?2023

    • Author(s)
      Imazato S
    • Organizer
      FDI World Dental Congress 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fabrication of polymer particles loaded with eDNA-degrading enzyme2023

    • Author(s)
      Kitagawa H, Jakubovics NS, Wu T, Tsuiki K, German MJ, Imazato S
    • Organizer
      2023 IADR/LAR General Session & Exhibition with WCPD
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 歯科材料への抗菌性付与のアプローチ2023

    • Author(s)
      北川晴朗,今里 聡
    • Organizer
      第45回日本バイオマテリアル学会大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Evaluation of long-term antibacterial effects of resin composite incorporating poly(METAC)2022

    • Author(s)
      Kohno T, Kitagawa H, Tsuboi R, Deng F, Sakai H, Imazato S
    • Organizer
      2022 International Association for Dental Research General Session & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Giomer containing S-PRG filler: overview as scientifically proven “bio-active” materials.2021

    • Author(s)
      Imazato S
    • Organizer
      99th General Session & Exhibition of the International Association for Dental Research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Immobilization of antibacterial component using electron-beam irradiation on dental resins2021

    • Author(s)
      Thongthai P, Kitagawa H, Imazato S
    • Organizer
      99th General Session & Exhibition of the International Association for Dental Research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2025-01-30  

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