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Elucidation of the relationship between oral bacteria and atrial fibrosis

Research Project

Project/Area Number 21K20924
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0903:Organ-based internal medicine and related fields
Research InstitutionHiroshima University

Principal Investigator

Miyauchi Shunsuke  広島大学, 保健管理センター, 助教 (30910799)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords心房細動 / 歯周炎 / 心房線維化 / 危険因子 / 口腔細菌 / 口腔内細菌 / 線維化 / 左心耳 / カテーテルアブレーション
Outline of Research at the Start

高齢化の進む我が国において心房細動の有病率は増加し、80歳で約10人に1人が罹患しているとされる。心房筋線維化は心房細動の永続化や心原性脳塞栓症発症に関与し、心房細動患者の健康寿命を著しく低下させる。研究責任者は口腔内細菌血漿抗体価の上昇が心房細動アブレーション治療後の再発リスクとなることを初めて報告した。本研究はヒト左心耳組織を用いた基礎的研究および、心房細動患者を対象とした前向き臨床研究の両輪で展開し、歯周炎や口腔内細菌感染が心房筋線維化に関与する機序の解明および、これらを標的とした心房細動患者マネージメントの新たな治療戦略を提唱するための学術的エビデンスを創出することを目的とする。

Outline of Final Research Achievements

Periodontitis is associated with some systemic diseases such as atherosclerosis, but the relationship between periodontitis and atrial fibrillation (AF) has not been clarified. In this study, we focused on atrial fibrosis which is the substrate of the onset and perpetuation of AF, and clarified the following points: 1) Periodontal inflamed surface area (PISA), a quantification index of active inflammation in periodontitis, was positively correlated with the atrial fibrosis degree 2) PISA is higher in patients with persistent AF than in those with paroxysmal AF. These findings were published in a peer-reviewed international journal (JACC Clin Electrophysiol. 2023;9(1):43-53). In addition, DNAs of major periodontal bacteria (Porphyromonas gingivalis, Prevotella intermedia、Fusobacterium nucleatum、Actinobacillus actinomycetemcomitans、Treponema denticola) were detected in the atrial tissue.

Academic Significance and Societal Importance of the Research Achievements

心房細動は脳梗塞、心不全の原因となり、発症、重症化予防が重要である。加齢や遺伝的素因も心房細動に関与するが、肥満、運動不足、睡眠呼吸障害、糖尿病、高血圧、脂質異常、喫煙、飲酒、カフェイン摂取は心房細動の修正可能な危険因子とされ、多職種による包括的な心房細動リスク管理が推奨されている。本研究成果は歯周炎が心房細動の新規の修正可能な危険因子であることを明らかにするための基礎的エビデンスとなる。既知の危険因子と比較して治療が容易な歯周炎を危険因子と明らかにすることは重要であり、心房細動診療における医科歯科連携の重要性が示唆される。

Report

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

    (7 results)

All 2023 2022 Other

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

  • [Journal Article] Relationship Between Periodontitis and Atrial Fibrosis in Atrial Fibrillation2023

    • Author(s)
      Miyauchi Shunsuke、Nishi Hiromi、Ouhara Kazuhisa、Tokuyama Takehito、Okubo Yousaku、Okamura Sho、Miyamoto Shogo、Oguri Naoto、Uotani Yukimi、Takasaki Taiichi、Katayama Keijiro、Furusho Hisako、Miyauchi Mutsumi、Takahashi Shinya、Hiyama Toru、Nakano Yukiko
    • Journal Title

      JACC: Clinical Electrophysiology

      Volume: 9 Issue: 1 Pages: 43-53

    • DOI

      10.1016/j.jacep.2022.08.018

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relationship Between Fibrosis, Endocardial Endothelial Damage, and?Thrombosis of Left Atrial Appendage?in?Atrial Fibrillation2023

    • Author(s)
      Miyauchi Shunsuke、Tokuyama Takehito、Takahashi Shinya、Hiyama Toru、Okubo Yousaku、Okamura Sho、Miyamoto Shogo、Oguri Naoto、Takasaki Taiichi、Katayama Keijiro、Miyauchi Mutsumi、Nakano Yukiko
    • Journal Title

      JACC: Clinical Electrophysiology

      Volume: in press Issue: 7 Pages: 1158-1168

    • DOI

      10.1016/j.jacep.2023.01.029

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Association between left atrial appendage fibrosis and thrombus formation: A histological approach2022

    • Author(s)
      Miyauchi Shunsuke、Tokuyama Takehito、Uotani Yukimi、Miyamoto Shogo、Ikeuchi Yoshihiro、Okamura Sho、Okubo Yousaku、Katayama Keijiro、Takasaki Taiichi、Nakatani Nobuhiro、Matsudaira Yorisato、Furusho Hisako、Miyauchi Mutsumi、Takahashi Shinya、Nakano Yukiko
    • Journal Title

      Journal of Cardiovascular Electrophysiology

      Volume: 33 Issue: 4 Pages: 677-687

    • DOI

      10.1111/jce.15384

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Relationship Between Periodontitis and Atrial Fibrosis in Atrial Fibrillation: Histological Evaluation of Left Atrial Appendages2023

    • Author(s)
      Shunsuke Miyauchi, Takehito Tokuyama, Yousaku Okubo, Sho Okamura, Shogo Miyamoto, Naoto Oguri, Shinya Takahashi, Taiichi Takasaki, Keijiro Katayama, Yukiko Nakano
    • Organizer
      第87回日本循環器病学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Relationship Between Periodontitis and Atrial Fibrosis in Atrial Fibrillation: Histological Evaluation of Left Atrial Appendages2022

    • Author(s)
      Shunsuke Miyauchi, Takehito Tokuyama, Yousaku Okubo, Sho Okamura, Shogo Miyamoto, Naoto Oguri, Shinya Takahashi, Taiichi Takasaki, Keijiro Katayama, Yukiko Nakano
    • Organizer
      American Heart Association Scientific Sessions 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Remarks] Gum infection may be a risk factor for arrhythmia

    • URL

      https://www.hiroshima-u.ac.jp/en/news/75127

    • Related Report
      2022 Annual Research Report
  • [Remarks] 【研究成果】心房細動患者で歯周炎が心房組織の線維化に関連することを発見

    • URL

      https://www.hiroshima-u.ac.jp/news/75038

    • Related Report
      2022 Annual Research Report

URL: 

Published: 2021-10-22   Modified: 2024-12-25  

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