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Neuro-immunological mechanism of retrogradely-transported peptides in oral diseases

Research Project

Project/Area Number 20K09893
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57010:Oral biological science-related
Research InstitutionKyushu Dental College

Principal Investigator

Kentaro Ono  九州歯科大学, 歯学部, 教授 (40316154)

Co-Investigator(Kenkyū-buntansha) 人見 涼露  日本大学, 歯学部, 講師 (70548924)
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 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsヘプシジン / 三叉神経節ニューロン / 口内炎 / 歯周炎 / 下歯槽神経障害 / 抗菌ペプチド / 疼痛 / Hamp / 口内炎疼痛 / 神経ペプチド / 神経軸索
Outline of Research at the Start

本研究では、神経系から免疫系への逆の経路の解明を目指し、口内炎モデルの三叉神経節に対するマイクロアレイ解析にて著明な発現増加を示したHamp、Reg3bおよびSerpina3nの3遺伝子(抗菌・免疫関連ペプチドをコード)に注目する。インビトロおよびインビボの実験系を用いて末梢神経での転写経路、軸索輸送、末梢ペプチド放出について包括的に検討を行う。末梢神経からの抗菌・免疫関連ペプチド分泌による免疫系調整が明らかとなれば、将来、新規の治療法や新薬の開発に繋がるかもしれない。

Outline of Final Research Achievements

The purpose of this study was to elucidate the effects of antimicrobial peptides induced in a nerve-specific manner in oral diseases such as oral ulcer, periodontitis, and inferior alveolar nerve injury. In a validation of the effect of steroid drug in a rat model of oral ulcer, the drug suppressed pain although the rate of healing was not changed. In a comprehensive genetic analysis from the trigeminal ganglion of the model, the gene for hepcidin, an antimicrobial peptide, was most elevated. The gene was specifically elevated at the site of disease and in the innervating ganglion, as was the case in the periodontitis and nerve injury models. Electrophysiological analysis showed that hepcidin enhanced the neural response to nociceptive mechanical stimulation in the oral mucosa. The present study demonstrate the involvement of hepcidin in oral neuroimmunological mechanisms.

Academic Significance and Societal Importance of the Research Achievements

口腔内には常在細菌がいるため、疾患発生には感染が付きものである。本研究にて抗菌ペプチドのヘプシジンが発現上昇する反応は種々の口腔内疾患モデルで共通して観察されており、口腔内疾患の成立機序を考えると理にかなった生体防御機構であると考えられる。また、ヘプシジンは疼痛を増強する作用を持っており、疼痛発生にて疾患部位を個体に認知・警告している可能シ性がある。本研究にて明らかにしたヘプシジン作用機構は種々の口腔疾患で共通しているため、口腔疾患の包括的治療を計画する際に非常に有用な情報を提供し、ヘプシジンは治療標的の1つとなり得る。

Report

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

    (2 results)

All 2023 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Hepcidin expression in the trigeminal ganglion and the oral mucosa in an oral ulcerative mucositis rat model2023

    • Author(s)
      Hitomi Suzuro、Nodai Tomotaka、Kokabu Shoichiro、Shikayama Takemi、Sago-Ito Misa、Nakatomi Chihiro、Terawaki Kiyoshi、Omiya Yuji、Shinoda Masamichi、Ono Kentaro
    • Journal Title

      PLOS ONE

      Volume: 18 Issue: 4 Pages: 0284617-0284617

    • DOI

      10.1371/journal.pone.0284617

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Expression and functional analysis of hamp/hepcidin in the trigeminal ganglion of the oral ulcerative mucositis rat model2021

    • Author(s)
      Suzuro Hitomi, Masamichi Shinoda and Kentaro Ono
    • Organizer
      歯科基礎医学会
    • Related Report
      2021 Research-status Report

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

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