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Analysis of the periodontal pocket epithelium barrier destruction mechanism caused by dental calculus and periodontopathic bacteria

Research Project

Project/Area Number 20K18540
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ziauddin SM  長崎大学, 医歯薬学総合研究科(歯学系), 客員研究員 (80868141)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords歯石 / 歯周病原細菌 / 上皮 / 歯周病 / 歯周ポケット / 歯石結晶
Outline of Research at the Start

歯石中のリン酸カルシウム結晶はNLRP3インフラマソームを活性化してマクロファージのIL-1β産生を誘導し、さらに歯肉上皮細胞にピロトーシスと呼ばれるインフラマソーム依存性細胞死を誘導することが明らかとなった。歯肉上皮細胞にピロトーシスが誘導されると歯肉溝/歯周ポケットにおける上皮バリアが破壊され、プラーク中の細菌の侵入を許し、歯周組織破壊がさらに進行する。本研究では、歯肉上皮細胞を歯石および歯周病原細菌で刺激し、細胞傷害性試験および細胞シート透過性試験を行うことにより、歯周ポケット上皮バリア破壊における歯石および歯周病原細菌の役割を明らかにする。

Outline of Final Research Achievements

It is known that calculus aggravates periodontal disease, but the mechanism has not been elucidated. In this study, we have clarified that calcium phosphate crystals in dental calculus activate the NLRP3 inflammasome to induce IL-1β production in macrophages, and induce inflammasome-dependent cell death called pyroptosis in gingival epithelial cells that enhances the permeability of the epithelial cell sheet. These results suggest that calculus particles are involved in the destruction of the gingival epithelial barrier and the exacerbation of inflammation in the periodontal tissue.

Academic Significance and Societal Importance of the Research Achievements

歯周病患者では歯石沈着により症状が悪化することは広く知られているが、歯石はプラークリテンション因子と考えられ、歯石自体の為害作用はあまり知られていない。本研究では、歯石中のリン酸カルシウム結晶が、NLRP3インフラマソームの活性化を介して歯周組織の破壊と歯周組炎症拡大に関与することを示したものであり、学術的に重要な意味を持つと同時に、今後の新たな歯周病の診断、治療法の開発へ寄与することが期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Biological characteristics and pulp regeneration potential of stem cells from canine deciduous teeth compared with those of permanent teeth2022

    • Author(s)
      Ziauddin S. M.、Nakashima Misako、Watanabe Hideto、Tominaga Michiyo、Iohara Koichiro
    • Journal Title

      Stem Cell Research & Therapy

      Volume: 13 Issue: 1 Pages: 1-13

    • DOI

      10.1186/s13287-022-03124-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Long-term clinical and radiographic evaluation of the effectiveness of direct pulp capping materials: A meta-analysis2021

    • Author(s)
      MATSUURA Takashi、ZIAUDDIN S. M.、KAWATA-MATSUURA Viviane K. S.、SUGIMOTO Kouji、YAMADA Shizuka、YOSHIMURA Atsutoshi
    • Journal Title

      Dental Materials Journal

      Volume: 40 Issue: 1 Pages: 1-7

    • DOI

      10.4012/dmj.2020-043

    • NAID

      130007978375

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2021-01-25
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cytotoxic effects of dental calculus particles and freeze‐dried Aggregatibacter actinomycetemcomitans and Fusobacterium nucleatum on HSC‐2 oral epithelial cells and THP‐1 macrophages2021

    • Author(s)
      Ziauddin S.M.、Alam Mohammad Ibtehaz、Mae Megumi、Oohira Masayuki、Higuchi Kanako、Yamashita Yasunori、Ozaki Yukio、Yoshimura Atsutoshi
    • Journal Title

      Journal of Periodontology

      Volume: - Issue: 6

    • DOI

      10.1002/jper.21-0196

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The Role of Cytokines Produced via the NLRP3 Inflammasome in Mouse Macrophages Stimulated with Dental Calculus in Osteoclastogenesis2021

    • Author(s)
      Mae Megumi、Alam Mohammad Ibtehaz、Yamashita Yasunori、Ozaki Yukio、Higuchi Kanako、Ziauddin S. M.、Montenegro Raudales Jorge Luis、Sakai Eiko、Tsukuba Takayuki、Yoshimura Atsutoshi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 22 Pages: 12434-12434

    • DOI

      10.3390/ijms222212434

    • NAID

      120007186852

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Role of quiescent osteoclast precursors in occlusal trauma in mice2020

    • Author(s)
      Yasunori Yamashita*, Yukio Ozaki, Kanako Higuchi, Masayuki Oohira, Megumi Mae, Ziauddin S.M., Atsutoshi Yoshimura
    • Organizer
      The 106th Annual Meeting of the American Academy of Periodontology in collaboration with the Japanese Society of Periodontology, the Japanese Academy of Clinical Periodontology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 直接覆髄材の有効性に関する長期臨床評価:メタアナリシス2020

    • Author(s)
      松裏貴史,S. M. Ziauddin,松裏恵子,杉本浩司,山田志津香,吉村篤利
    • Organizer
      日本歯科保存学会2020年度春季学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ペプチドグリカンおよびリポ多糖投与マウス歯槽骨面上の破骨細胞形成におけるIL-10の役割2020

    • Author(s)
      尾崎幸生、山下恭徳、前めぐみ、大平真之、Ziauddin SM、Alam IM、樋口賀奈子、金子高士、吉村篤利
    • Organizer
      日本歯科保存学会2020年度春季学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 音波振動歯ブラシの臨床的有用性の評価2020

    • Author(s)
      山下 恭徳,前 めぐみ,大平 真之,樋口 賀奈子,Ziauddin S.M.,尾崎 幸生,吉村 篤利
    • Organizer
      第63回日本歯周病学会春季学術大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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