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Development of a Novel Evaluation System Useful for Determining Periodontitis Grading Classification

Research Project

Project/Area Number 21K10272
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57080:Social dentistry-related
Research InstitutionOtemae Junior College

Principal Investigator

SEKINE SHINICHI  大手前短期大学, 歯科衛生学科, 教授 (70506344)

Co-Investigator(Kenkyū-buntansha) 久保庭 雅恵  大阪大学, 大学院歯学研究科, 准教授 (00303983)
山口 佳則  大阪大学, 工学(系)研究科(研究院), その他 (20386634)
竹内 洋輝  大阪大学, 歯学部附属病院, 講師 (40572186)
笠川 あや  大阪大学, 歯学部附属病院, 医員 (40876679)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords歯周炎グレード / バイオフィルム / POCT / CF-PCR / 歯周病の分類 / グレード / 歯周炎の分類
Outline of Research at the Start

「歯周病の新分類」では、歯周炎が4つのステージ(1~4)と3つのグレード(A~C)に分けられた。ステージは「進行度」、グレードは「進行リスク」を示す。本邦の歯周病治療において、全歯を対象とした歯周ポケット測定や「骨吸収の評価」は行われているが、グレードを決定する「バイオフィルムと組織の破壊程度」、「炎症マーカー」および「バイオマーカー」の評価が十分行われているとはいえない。本研究課題では、「バイオフィルムの高病原化」と「バイオマーカー」を簡易に評価できる新規システムを構築し、歯周炎のグレード判定に応用する。

Outline of Final Research Achievements

In the 2021 study, multi-PCR was performed using a CF-PCR microfluidic chip targeting red complexes (P.g, T.d, and T.f), which are strongly associated with periodontitis. We found the optimal combination of primers and showed that the amplification time of amplicons can be significantly shortened. In the 2022 study, CF-PCR array microfluidic chip was fabricated and multiple genes were amplified simultaneously. Amplification was successfully achieved in as short as 2'07'', and the effectiveness of this method as a POCT was confirmed. In the FY2023 study, we proposed a bilayer water droplet CF-PCR chip to minimize air bubbles and evaporation, and succeeded in amplifying the target gene of P.g. within 11'16''.

Academic Significance and Societal Importance of the Research Achievements

本研究は、CF-PCRマイクロ流体チップを用いた歯周病菌の迅速診断法を開発し、歯周病のグレード分類決定に応用可能なポイントオブケア(POCT)検査法としての実用性を示した。令和3年度では、P.g、T.d、T.fの標的遺伝子を短時間で増幅する方法を確立し、その有効性を確認した。令和4年度では、CF-PCRアレイマイクロ流体チップを用いて複数の遺伝子を同時に迅速かつ正確に増幅できることを確認し、偽陽性の問題にも対処した。令和5年度では、二重層の水滴CF-PCRチップを提案し、気泡や蒸発の問題を最小限に抑えながら、P.gの遺伝子を11分16秒以内に増幅する技術を確立した。

Report

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

    (5 results)

All 2023 2022 2021

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

  • [Journal Article] Lower fluidic resistance of double-layer droplet continuous flow PCR microfluidic chip for rapid detection of bacteria2023

    • Author(s)
      Zhenqing Li, Yifei Wang, Zehang Gao, Shinichi Sekine, Qingxiang You, Songlin Zhuang, Dawei Zhang, Shilun Feng, Yoshinori Yamaguchi
    • Journal Title

      Anal Chim Acta .

      Volume: - Pages: 340995-340995

    • DOI

      10.1016/j.aca.2023.340995

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of <i>Q</i>-switched Er:YAG laser irradiation on bonding performance to dentin surface2022

    • Author(s)
      Kasakawa A, Sekine S, Tanaka K, Murakami J, Kondo S, Hazama H, Awazu K, Akiyama S.
    • Journal Title

      Dental Materials Journal

      Volume: 41 Issue: 4 Pages: 616-623

    • DOI

      10.4012/dmj.2021-281

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2022-07-25
    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A continuous flow PCR array microfluidic chip applied for simultaneous amplification of target genes of periodontal pathogens2022

    • Author(s)
      Bo Yang, Ping Wang, Zhenqing Li, Chunxian Tao, Qingxiang You, Shinichi Sekine, Songlin Zhuang, Dawei Zhang, Yoshinori Yamaguchi
    • Journal Title

      Lab Chip

      Volume: 22(4) Issue: 4 Pages: 733-737

    • DOI

      10.1039/d1lc00814e

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multiplex amplification of target genes of periodontal pathogens in continuous flow PCR microfluidic chip2021

    • Author(s)
      Li Zhenqing、Liu Jiahui、Wang Ping、Tao Chunxian、Zheng Lulu、Sekine Shinichi、Zhuang Songlin、Zhang Dawei、Yamaguchi Yoshinori
    • Journal Title

      Lab on a Chip

      Volume: 21 Issue: 16 Pages: 3159-3164

    • DOI

      10.1039/d1lc00457c

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inhibitory effects of curcumin against cytotoxicity of Porphyromonas gingivalis outer membrane vesicles2021

    • Author(s)
      Izui Shusuke、Sekine Shinichi、Murai Hiroki、Takeuchi Hiroki、Amano Atsuo
    • Journal Title

      Archives of Oral Biology

      Volume: 124 Pages: 105058-105058

    • DOI

      10.1016/j.archoralbio.2021.105058

    • Related Report
      2021 Research-status Report
    • Peer Reviewed

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

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