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Elucidation of an autonomous and self-amplifying mechanism to explain the increased incidence and chronicity of atrial fibrillation in the elderly

Research Project

Project/Area Number 21H02909
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Furukawa Tetsushi  東京医科歯科大学, 難治疾患研究所, 教授 (80251552)

Co-Investigator(Kenkyū-buntansha) 井原 健介  東京医科歯科大学, 難治疾患研究所, 助教 (50770210)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Keywords心房細動 / ミトコンドリア / セルフリーDNA / バイオマーカー / 自然免疫 / マクロファージ / マイトファジー / 全エクソン相関解析 / 自律神経 / 炎症
Outline of Research at the Start

心房細動の病態発現機構として「慢性炎症」がある。この分子機構の鍵は、「高齢者における発症の指数関数的増加」・「AF beget AFが関与する慢性化・重症化」を説明できる『自律的・自己増幅的機構』にある、との仮説をたて、以下の2つの経路に着目した:
(A) Tks5機能異常による 自律的な単球のマクロファージ分化・組織浸潤
(B) 自己増幅的 vicious cycle「代謝ストレス→循環ミトコンドリアDNA→自然炎症」
本研究計画では、これらの経路の解析を通して、自律的・自己増幅的機構という視点から、心房細動の発症・重症化機構にブレークスルーをもたらすことを目的とする。

Outline of Final Research Achievements

Atrial fibrillation (AF) is the most common type of arrhythmia and is a major social issue in Japan as it frequently leads to cardioembolic stroke and accounts for approximately 20% of bedridden patients. In this clinical trial, we found that circulating mitochondrial DNA (mtDNA) levels were higher in patients with chronic AF than in healthy controls and patients with paroxysmal AF. In vitro and in vivo experiments using cultured cells and mice, we demonstrated that high-frequency stimulation induces the release of mitochondrial DNA (mtDNA) as a DAMP and that mtDNA triggers an inflammatory response via TLR9. These findings suggest that mtDNA links metabolic stress and inflammation, contributing to the development and progression of atrial fibrillation (AF).

Academic Significance and Societal Importance of the Research Achievements

心房細動はもっと頻度の多い不整脈であり、高頻度に脳梗塞(心原性脳塞栓)を合併し、本邦における寝たきりの約20%の原因となっている喫緊の社会程課題となっている。今回、循環ミトコンドリアフリーDNAが心房細動発症、及び慢性化のバイオマーカーとなること、そのメカニズムを明らかにしたことが学術的に高く評価できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (25 results)

All 2024 2023 2022 2021

All Journal Article (14 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 10 results,  Open Access: 8 results) Presentation (11 results) (of which Invited: 3 results)

  • [Journal Article] Sacubitril/valsartan attenuates atrial conduction disturbance and electrophysiological heterogeneity with ameliorating fibrosis in mice2024

    • Author(s)
      Iwamiya Satoshi、Ihara Kensuke、Furukawa Tetsushi、Sasano Tetsuo
    • Journal Title

      Frontiers in Cardiovascular Medicine

      Volume: 11 Pages: 1341601-1341601

    • DOI

      10.3389/fcvm.2024.1341601

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prediction of the Presence of Ventricular Fibrillation From a Brugada Electrocardiogram Using Artificial Intelligence2023

    • Author(s)
      Nakamura Tomofumi、Aiba Takeshi、Shimizu Wataru、Furukawa Tetsushi、Sasano Tetsuo
    • Journal Title

      Circulation Journal

      Volume: 87 Issue: 7 Pages: 1007-1014

    • DOI

      10.1253/circj.CJ-22-0496

    • ISSN
      1346-9843, 1347-4820
    • Year and Date
      2023-06-23
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Risk stratification of atrial fibrillation and stroke using single nucleotide polymorphism and circulating biomarkers2023

    • Author(s)
      Sasano Tetsuo、Ihara Kensuke、Tanaka Toshihiro、Furukawa Tetsushi
    • Journal Title

      PLOS ONE

      Volume: 18 Issue: 10 Pages: e0292118-e0292118

    • DOI

      10.1371/journal.pone.0292118

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Genetic risk score of cerebral infarction in atrial fibrillation genome‐wide association study2023

    • Author(s)
      Ebana Yusuke、Liu Lian、Ihara Kensuke、Abe Keiko、Terao Chikashi、Kamatani Yoichiro、Sasano Tetsuo、Furukawa Tetsushi
    • Journal Title

      European Journal of Clinical Investigation

      Volume: 53 Issue: 12

    • DOI

      10.1111/eci.14084

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Seeking a Better Experimental Model of Atrial Fibrillation2022

    • Author(s)
      Ihara Kensuke、Sasano Tetsuo
    • Journal Title

      Circulation Journal

      Volume: 86 Issue: 2 Pages: 330-331

    • DOI

      10.1253/circj.CJ-21-0770

    • NAID

      130008144187

    • ISSN
      1346-9843, 1347-4820
    • Year and Date
      2022-01-25
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Local Injection of Hydroxyapatite Electret Ameliorated Infarct Size After Myocardial Infarction2022

    • Author(s)
      Yamaguchi Junji、Chiba Risako、Komuro Hiroaki、Ihara Kensuke、Nozaki Kosuke、Nagai Akiko、Furukawa Tetsushi、Sasano Tetsuo
    • Journal Title

      Circulation Reports

      Volume: 4 Issue: 1 Pages: 38-47

    • DOI

      10.1253/circrep.CR-21-0100

    • NAID

      130008140051

    • ISSN
      2434-0790
    • Year and Date
      2022-01-07
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] <scp>JCS</scp> / <scp>JHRS</scp> 2020 Guideline on Pharmacotherapy of Cardiac Arrhythmias2022

    • Author(s)
      Ono Katsushige、Iwasaki Yu‐ki、Hiroshige Murata et al.
    • Journal Title

      Journal of Arrhythmia

      Volume: 38 Issue: 6 Pages: 833-973

    • DOI

      10.1002/joa3.12714

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of Inflammation in the Pathogenesis of Atrial Fibrillation2022

    • Author(s)
      Ihara Kensuke、Sasano Tetsuo
    • Journal Title

      Frontiers in Physiology

      Volume: 13 Pages: 862164-862164

    • DOI

      10.3389/fphys.2022.862164

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 遺伝性不整脈・心筋疾患の遺伝子診断の現状と未来2022

    • Author(s)
      井原健介、古川哲史
    • Journal Title

      循環器内科

      Volume: 91 Pages: 260-264

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Cholesterol-functionalized DNA/RNA heteroduplexes cross the blood-brain barrier and knock down genes in the rodent CNS.2021

    • Author(s)
      Nagata T, Dwyer CA, Yoshida-Tanaka K, Ihara K, Ohyagi M, Kaburagi H, Miyata H, Ebihara S, Yoshioka K, Ishii T, Miyata K, Miyata K, Powers B, Igari T, Yamamoto S, Arimura N, Hirabayashi H, Uchihara T, Hara RI, Wada T, Bennett CF, Seth PP, Rigo F, Yokota T
    • Journal Title

      Nat Biotechnol

      Volume: 39 Issue: 12 Pages: 1529-1536

    • DOI

      10.1038/s41587-021-00972-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] DNA/RNA heteroduplex oligonucleotide technology for regulating lymphocytes in vivo2021

    • Author(s)
      Ohyagi Masaki、Nagata Tetsuya、Ihara Kensuke、Yoshida-Tanaka Kie、Nishi Rieko、Miyata Haruka、Abe Aya、Mabuchi Yo、Akazawa Chihiro、Yokota Takanori
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 7344-7344

    • DOI

      10.1038/s41467-021-26902-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 12誘導心電図2021

    • Author(s)
      井原健介、古川哲史
    • Journal Title

      診断と治療

      Volume: 109 Pages: 147-151

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Exosomeを心不全の診断に生かす2021

    • Author(s)
      井原健介、笹野哲郎
    • Journal Title

      Cardiac practice

      Volume: 31 Pages: 125-128

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 秒で見抜くヤバい心電図2021

    • Author(s)
      井原健介、中釜瞬
    • Journal Title

      EmerLog

      Volume: 34 Pages: 6-93

    • Related Report
      2021 Annual Research Report
  • [Presentation] Cytoplasmic RBM20 Granules Cause Atrial Arrhythmogenicity in Mice2024

    • Author(s)
      Ihara K、Iwamiya S、Hiraoka Y、Kuroyanagi H、Furukawa T、Sasano T
    • Organizer
      The 88th Annual Scientific Meeting of the Japanese Circulation Society
    • Related Report
      2023 Annual Research Report
  • [Presentation] The Electrophysiological Properties against Atrial Arrhythmogenicity in Murine Heart Failure Treated with Sacubitril/Valsartan2024

    • Author(s)
      Iwamiya S、Ihara K、Furukawa T、Sasano T
    • Organizer
      The 88th Annual Scientific Meeting of the Japanese Circulation Society
    • Related Report
      2023 Annual Research Report
  • [Presentation] Genome-wide association analysis and construction of polygenic risk score model for predicting paroxysmal atrial fibrillation using LightGBM model2024

    • Author(s)
      Shiomi M, Nagata Y, Sudo T, Ichikawa T, Ihara K, Asada K, Tanaka Y, Yamauchi Y, Sasaki T, Hachiya H, Imai Y, Fujita H, Sasano T, Furukawa T, Tanaka T
    • Organizer
      The 7th JCS Council Forum on Basic CardioVascular Research
    • Related Report
      2023 Annual Research Report
  • [Presentation] RBM20変異と心房性不整脈2023

    • Author(s)
      井原健介
    • Organizer
      日本心血管作動物質学会若手研究者交流シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Atrial Fibrillation in Cardiomyopathy Mice with Rbm20 Mutation2022

    • Author(s)
      Ihara K, Kuroyanagi H, Hiraoka Y, Sasano T, Furukawa T
    • Organizer
      The 86th Annual Scientific Meeting of the Japanese Circulation Society
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The effects of Sacubitril/Valsartan on murine atria with pressure overload2022

    • Author(s)
      Iwamiya S, Ihara K, Furukawa T, Sasano T
    • Organizer
      The 86th Annual Scientific Meeting of the Japanese Circulation Society
    • Related Report
      2021 Annual Research Report
  • [Presentation] 心不全モデルのマウス心房に対するSacubitril/Valsartanの電気生理学的効果2022

    • Author(s)
      岩宮賢、井原健介、古川哲史、笹野哲郎
    • Organizer
      第262回日本循環器学会関東甲信越地方会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 不整脈原性拡張型心筋症の新規発症機序2021

    • Author(s)
      井原健介、黒柳秀人、平岡優一、笹野哲郎、古川哲史
    • Organizer
      第25回日本心不全学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The effects of Sacubitril/Valsartan on electrophysiological properties of atria in murine hearts with pressure overload2021

    • Author(s)
      Iwamiya S, Ihara K, Furukawa T, Sasano T
    • Organizer
      The 5th JCS Council Forum on Basic CardioVascular Research
    • Related Report
      2021 Annual Research Report
  • [Presentation] 心房細動モデルマウスのoptical mapping による評価2021

    • Author(s)
      岩宮賢、井原健介、富井直輝、山崎正俊、黒柳秀人、佐久間一郎、古川哲史、笹野哲郎
    • Organizer
      心電学関連春季大会2021
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 心不全モデルマウスにおけるSacubitril/Valsartanの心房への電気生理学的効果2021

    • Author(s)
      岩宮賢、井原健介、古川哲史、笹野哲郎
    • Organizer
      心電学関連春季大会2021
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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