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Analysis of the relationship between HMGB1 and necroptosis in dental pulpitis

Research Project

Project/Area Number 20K18499
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57030:Conservative dentistry-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Hashimoto Kentaro  東京医科歯科大学, 大学院医歯学総合研究科, 助教 (80825662)

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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
KeywordsHMGB1 / 歯髄
Outline of Research at the Start

歯髄炎・歯髄壊死は通常う蝕などの細菌感染に継発するが、明らかな細菌感染がない支台歯形成、外傷後などにも継発することがある。近年ネクローシスをおこした細胞より放出される核内タンパク質であるhigh mobility group box 1(HMGB1)と非感染性炎症疾患との関連が報告されている。さらにはアポトーシス、ネクローシス以外の細胞死としてネクロプトーシスと称される制御された壊死が報告されており、その際HMGB1などの放出が誘導される。本研究では以上の背景をもとに、歯髄疾患とHMGB1の関連を追究し、非感染性炎症やネクロプトーシスを介した歯髄疾患の新規病態機序の解明を図ることを目的とする。

Outline of Final Research Achievements

To investigate the induction of inflammatory mediator production by HMGB1 and the expression of HMGB1 in inflamed dental pulp, mouse dental papilla cells (MDP) were treated at various temperatures, and the resulting cell supernatants were added to MDP. As a result, an increase in the release of HMGB1 protein and the upregulation of Interleukin-6 (IL6), an inflammatory cytokine, gene expression were observed at 52°C treatment. Additionally, an enhancement of NF-κB p65 phosphorylation was observed. These findings suggest that even temporary exposure of dental pulp tissue to high temperatures induces the production of DAMPs, including HMGB1, and the produced HMGB1 may induce the production of inflammatory mediators through the phosphorylation of NF-κB.

Academic Significance and Societal Importance of the Research Achievements

健康寿命の伸ばすためには歯の保存が必要である。歯を長期にわたって口腔内で保存するためには歯髄の保存が重要である。歯髄炎・歯髄壊死は歯髄を失う原因である。通常の歯髄炎ではう蝕によっておこるが、う蝕のない歯においても歯髄炎や歯髄壊死を認めることがある。High mobility group box 1(HMGB1)と呼ばれる核内タンパク質はダメージを受けた細胞から放出され炎症を修飾する。この研究ではHMGB1と歯髄細胞の炎症との関連について調べた。この研究は歯髄における非感染性の炎症のメカニズムの一端を解明する一助となり将来歯髄炎を抑制する治療戦略の創生につながることが期待できる。

Report

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

    (4 results)

All 2023 2022 2020

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results)

  • [Journal Article] Hydraulic calcium silicate-based root canal sealers mitigate proinflammatory cytokine synthesis and promote osteogenesis in?vitro2023

    • Author(s)
      Alchawoosh Aseel、Hashimoto Kentaro、Kawashima Nobuyuki、Noda Sonoko、Nozaki Kosuke、Okiji Takashi
    • Journal Title

      Journal of Dental Sciences

      Volume: - Issue: 4 Pages: 1731-1739

    • DOI

      10.1016/j.jds.2022.12.019

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the anti-inflammatory effects of surface-reaction-type pre-reacted glass-ionomer filler containing root canal sealer in lipopolysaccharide-stimulated RAW264.7 macrophages2022

    • Author(s)
      THEIN Htoo Shwe Sin、HASHIMOTO Kentaro、KAWASHIMA Nobuyuki、NODA Sonoko、OKIJI Takashi
    • Journal Title

      Dental Materials Journal

      Volume: 41 Issue: 1 Pages: 150-158

    • DOI

      10.4012/dmj.2021-139

    • NAID

      130008150329

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2022-01-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biocompatibility and pro-mineralization effect of tristrontium aluminate cement for endodontic use2022

    • Author(s)
      Adel Sherif、Hashimoto Kentaro、Kawashima Nobuyuki、Wada Takahiro、Uo Motohiro、Okiji Takashi
    • Journal Title

      Journal of Dental Sciences

      Volume: 17 Issue: 3 Pages: 1193-1200

    • DOI

      10.1016/j.jds.2021.12.018

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Journal Article] A Novel Bioactive Endodontic Sealer Containing Surface-Reaction-Type Prereacted Glass-Ionomer Filler Induces Osteoblast Differentiation2020

    • Author(s)
      Kawashima Nobuyuki、Hashimoto Kentaro、Kuramoto Masashi、Bakhit Alamuddin、Wakabayashi Yasumiko、Okiji Takashi
    • Journal Title

      Materials

      Volume: 13 Issue: 20 Pages: 4477-4477

    • DOI

      10.3390/ma13204477

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access

URL: 

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

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