• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

The mechanism of progression of Multiple sclerosis by periodontitis associated bacteria

Research Project

Project/Area Number 22K17011
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57020:Oral pathobiological science-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Okano Tokuju  東京医科歯科大学, 大学院医歯学総合研究科, 助教 (70886663)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords歯周炎 / 多発性硬化症 / インフラマソーム / HIF-1a / ROS / JAK / STAT / inflammasome / Porphyromonas gingivalis / 歯周炎関連細菌
Outline of Research at the Start

Pgは自己免疫疾患の一つ多発性硬化症(Multiple Sclerosis、MS)を増悪化させることが示唆されている。申請者は、PgによるMS増悪化に関わる宿主因子候補として低酸素誘導因子HIF-1αを同定し、さらにHIF-1αが低酸素依存的にPgによるインフラマソーム活性化 を制御していることを見出した。そこで申請者は、このHIF-1αによって制御されている細 胞内代謝産物および低酸素応答遺伝子が関連したインフラマソーム活性化こそがMS増悪化 を誘導しているのではないかという仮説を立てた。本研究ではこの仮説の検証を行い、PgによるMS増悪化機構の解明を 目指す。

Outline of Final Research Achievements

Previous studies demonstrated that Porphyromonas gingivalis (P. gingivalis, Pg), periodontitis associated bacteria can exacerbates Multiple Sclerosis (MS) in clinical study. In this study we investigated ROS production and TRIF expression level controls inflammasome activation under hypoxic condition by RNA sequencing analysis of bone marrow derived macrophages (BMDMs). Actually ROS inhibitor suppress the inflammasome activation by Pg infection in BMDMs. We also checked TRIF deficient BMDMs infected with Pg under normoxia and hypoxia. Inflammasome activation is low level compared to wild-type BMDMs. These tendency is same as HIF-1α deficiency.

Academic Significance and Societal Importance of the Research Achievements

この研究成果は、長年議論されてきた歯周炎とMSに関する研究に大きなインパクトを与えることができる。また、増悪化メカニズムを理解することによって、歯周炎とMSを併発した患者さんのための新たな抗歯周炎-MS薬の開発へとつなげられることが予想される。さらに本研究は、多発性硬化症のみならす、歯科学において長年議論され続けている様々な歯周炎と自己免疫疾患、または歯周炎と全身疾患の連関メカニズムを解明する足掛かりとなっていくことが期待される。

Report

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

    (5 results)

All 2024 2023 2022

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

  • [Journal Article] Inflammasome-triggered IL-18 controls skin inflammation in the progression of Buruli ulcer2023

    • Author(s)
      Suzuki Toshihiko、Boonyaleka Kotchakorn、Okano Tokuju、Iida Tamako、Yoshida Mitsunori、Fukano Hanako、Hoshino Yoshihiko、Iwakura Yoichiro、Ablordey Anthony S.、Ashida Hiroshi
    • Journal Title

      PLOS Pathogens

      Volume: 19 Issue: 11 Pages: e1011747-e1011747

    • DOI

      10.1371/journal.ppat.1011747

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] <i>Fusobacterium nucleatum</i> infection activates the noncanonical inflammasome and exacerbates inflammatory response in DSS‐induced colitis2023

    • Author(s)
      Boonyaleka Kotchakorn、Okano Tokuju、Iida Tamako、Leewananthawet Anongwee、Sasai Miwa、Yamamoto Masahiro、Ashida Hiroshi、Suzuki Toshihiko
    • Journal Title

      European Journal of Immunology

      Volume: 53 Issue: 11 Pages: 1-13

    • DOI

      10.1002/eji.202350455

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Tannerella forsythia induces inflammasome activation by triggering both NLRP3 and Caspase-4.2024

    • Author(s)
      Chenwei Hsu, Tokuju Okano, Toshihiko Suzuki.
    • Organizer
      第52回日本免疫学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Oral infection of P. gingivalis induces exacerbation of neurological manifestation in mice2023

    • Author(s)
      Tokuju Okano, Toshihiko Suzuki
    • Organizer
      第96回日本細菌学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] Porphyromnas gingivalis infection triggers enhancement of severity for EAE following inflammasome activation in macrophages.2022

    • Author(s)
      Tokuju Okano, Toshihiko Suzuki
    • Organizer
      第51回日本免疫学会学術集会
    • Related Report
      2022 Research-status Report

URL: 

Published: 2022-04-19   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi