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Myocardial Fibrosis as an etiology and a predictor for prognosis in Atrial Fibrillation and

Research Project

Project/Area Number 19K17594
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53020:Cardiology-related
Research InstitutionKyoto University

Principal Investigator

Kawaji Tetsuma  京都大学, 医学研究科, 客員研究員 (50791761)

Project Period (FY) 2019-04-01 – 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: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords心房細動 / 線維化 / 炎症 / バイオマーカー
Outline of Research at the Start

心房細動(AF)アブレーションを受ける患者10人(screening cohort)を対象として線維化との関連が示唆されている各種バイオマーカー網羅的に測定し、AFにおける線維化に特異的なバイオマーカーの抽出を行う。さらに次年度以降では、200人のAF患者(validation cohort)を対象としてAF患者の線維化病態解明につとめ、さらには経時的な線維化進行の病態を明らかにする。

Outline of Final Research Achievements

We conducted comprehensive measurements of inflammatory biomarkers that suggest an association with fibrosis in a small sample of patients undergoing atrial fibrillation (AF) ablation. Among various biomarkers, we detected specific biomarkers that correlated with the extent of low-voltage areas (left atrial fibrosis), namely IL-17A (positive correlation) and IFN-γ (negative correlation), suggesting that the IL-17A/IFN-γ ratio is the most indicative value reflecting fibrosis. Subsequently, we immobilized the biomarkers to TGF-β and performed numerical quantification. An overall increase in TGF-β was observed over time. It was also found that this progression was particularly rapid in cases of atrial fibrillation recurrence.

Academic Significance and Societal Importance of the Research Achievements

AFと末梢血バイオマーカーとの関連としては、MRIで左心房の遅延造影が高度であった症例では末梢血TGF-β1が有意に高かったことや、左心房の低電位領域の重症度が末梢血やmicroRNA-21と相関することが報告されている。しかし、いずれも一つのバイオマーカーにおける線維化や予後との関連性の報告がほとんどであり、線維化に特異的なバイオマーカーの抽出やその変動や心筋代謝変化に関する詳細な検討がされていない。本研究は複数の末梢血バイオマーカーの変動や心筋代謝変化からAFの線維化のメカニズムを解明し、治療法の開発に寄与することができる可能性がある

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (3 results)

All 2021 2020

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

  • [Journal Article] Association between serum inflammatory biomarkers and atrial low voltage in patients with atrial fibrillation: A phase 1 FIB-MARK study2021

    • Author(s)
      Kawaji Tetsuma、Ono Koh、Sowa Naoya、Aizawa Takanori、Hojo Shun、Yaku Hidenori、Nakatsuma Kenji、Kaneda Kazuhisa、Kato Masashi、Yokomatsu Takafumi、Shizuta Satoshi、Miki Shinji、Kimura Takeshi
    • Journal Title

      IJC Heart & Vasculature

      Volume: 37 Pages: 100904-100904

    • DOI

      10.1016/j.ijcha.2021.100904

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Serum interleukin-17A/Interferon-gamma ratio As a Predictor for the Severity of Atrial Low Voltage in Atrial Fibrillation: from FIB-MARK study2021

    • Author(s)
      川治徹真
    • Organizer
      日本不整脈心電学会学術集会
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Serum Interleukin-17A/Interferon-gamma ratio As a Predictor for the Severity of Atrial Low Voltage in Atrial Fibrillation: from FIB-MARK study2020

    • Author(s)
      Tetsuma Kawaji
    • Organizer
      ESC Congress 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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