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The establishment of novel root canal therapy by activation of immune response and bone metabolism

Research Project

Project/Area Number 20K09952
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

Itoh Shousaku  大阪大学, 大学院歯学研究科, 准教授 (90360495)

Co-Investigator(Kenkyū-buntansha) 阿部 真土  大阪大学, 大学院歯学研究科, 講師 (40448105)
成瀬 陽菜  大阪大学, 歯学部附属病院, 医員 (60823515)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords根管貼薬剤 / Wnt/β-catenin シグナル伝達経路 / 炭酸リチウム / Wntシグナル / 炭酸カルシウム / リチウムイオン / 組織再生
Outline of Research at the Start

先行研究により,根尖性歯周炎モデルマウスにLiClを根管貼薬剤として用いたところ,根尖病変の治癒を促進するという結果が得られている。そこで,すでに抗うつ剤として処方され,安全性が担保されている炭酸リチウムを根管貼薬剤として用いた場合,同等の効果を有するのか検証する。予備実験的ではあるが,同等の効果があるという結果は既に得ている。また,骨髄から調整した間葉系幹細胞は,拡大した根尖病変の再生に適しているのかどうかも検証したい。具体的には,申請者らが開発した方法にて濃縮された幹細胞集団(HipOP)を根管から根尖病変内に填入し,経時的に組織再生の状態を病変体積変化および病理組織学的観察にて評価する。

Outline of Final Research Achievements

The application of Li2CO3 into root canals showed the healing ability for apical periodontitis. The application of Li2CO3 into root canal induced the appearance of CD68/CD206-double positive cells and Foxp3-positive cells in the rats’ periapical lesions at an early stage of inflammation. After 24 h of Li2CO3 application, Axin2-positive cells were observed in the periapical lesions. Our findings demonstrated that Li2CO3 activates the Wnt/β-catenin signaling pathway and immediately induces the healing process. From our results, we propose that Li2CO3 could be used as an effective novel root canal medicament for apical periodontitis.

Academic Significance and Societal Importance of the Research Achievements

これまでの根管貼薬剤は, 主に起炎細菌の殺菌・静菌を目的に開発されてきたのに対し,本研究は,宿主細胞内シグナル伝達経路を活性化して, 病変の治癒を賦活化する根管貼薬剤を開発するというものである。研究の結果,炭酸リチウムはWnt/β-catenin シグナル伝達経路を活性化し,M1 マクロファージの分化抑制,M2 マクロファージの分化促進,制御性 T 細胞の分化誘導がおこり,治癒に適した環境が整えられた。そして,硬組織の形成も誘導された結果,根尖病変体積が縮小した。本研究成果により,歯根端切除術を回避できる症例が増えることが予測され,超高齢社会において,大きなメリットをもたらすと考えている。

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 (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] Pregnane X receptor (PXR) represses osteoblast differentiation through repression of the Hedgehog signaling pathway.2022

    • Author(s)
      Saeki N., Itoh Y., Kanai R., Itoh S., Inubushi T., Akiyama S., Inui-Yamamoto C., Abe M.
    • Journal Title

      Exp Cell Res

      Volume: 416(1) Issue: 1 Pages: 113156-113156

    • DOI

      10.1016/j.yexcr.2022.113156

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In-air micro-proton-induced X-ray/gamma-ray emission analysis of the acid resistance of root dentin after applying fluoride-containing materials incorporating calcium2021

    • Author(s)
      YAGI Kyoko、UEMURA Reo、YAMAMOTO Hiroko、ISHIMOTO Takuya、NAITO Katsuaki、ITOH Shousaku、MATSUDA Yasuhiro、OKUYAMA Katsushi、NAKANO Takayoshi、HAYASHI Mikako
    • Journal Title

      Dental Materials Journal

      Volume: 40 Issue: 5 Pages: 1142-1150

    • DOI

      10.4012/dmj.2020-273

    • NAID

      130008093772

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2021-09-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intracellular density is a novel indicator of differentiation stages of murine osteoblast lineage cells2021

    • Author(s)
      Itoh Yuki、Itoh Shousaku、Naruse Haruna、Kagioka Takumi、Hue Mai Thi、Abe Makoto、Hayashi Mikako
    • Journal Title

      Journal of Cellular Biochemistry

      Volume: 122 Issue: 12 Pages: 1805-1816

    • DOI

      10.1002/jcb.30135

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The Wnt/β-catenin signaling pathway has a healing ability for periapical periodontitis2021

    • Author(s)
      Naruse Haruna、Itoh Shousaku、Itoh Yuki、Kagioka Takumi、Abe Makoto、Hayashi Mikako
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 19673-19673

    • DOI

      10.1038/s41598-021-99231-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Senescence-accelerated mouse prone 8 (SAMP8) mice exhibit reduced entoconid in the lower second molar2021

    • Author(s)
      Saeki Naoya、Inui-Yamamoto Chizuko、Kuraki Moe、Itoh Shousaku、Inubushi Toshihiro、Okamoto Motoki、Akiyama Shigehisa、Wakisaka Satoshi、Abe Makoto
    • Journal Title

      Archives of Oral Biology

      Volume: 128 Pages: 105172-105172

    • DOI

      10.1016/j.archoralbio.2021.105172

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Kruppel-like factor 4 upregulates matrix metalloproteinase 13 expression in chondrocytes via mRNA stabilization.2020

    • Author(s)
      Takeuchi Y, Tatsuta S, Kito A, Fujikawa J, Itoh S, Itoh Y, Akiyama S, Yamashiro T, Wakisaka S, Abe M
    • Journal Title

      Cell and Tissue Research

      Volume: 282(2) Issue: 2 Pages: 307-319

    • DOI

      10.1007/s00441-020-03228-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 炭酸リチウム根管貼薬による根尖病変治癒促進メカニズムの解析2021

    • Author(s)
      鍵岡琢実、伊藤祥作、成瀬陽菜、伊藤勇紀、林美加子
    • Organizer
      日本歯科保存学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Effect of Lithium Carbonate on the Healing of Apical Periodontitis2020

    • Author(s)
      Kagioka T, Itoh S, Naruse H, Itoh Y, Hayashi M.
    • Organizer
      第68回国際歯科研究学会日本部会(JADR)総会・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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