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CT imaging to detect fibrosis in epicardial fat and identify patients at high risk for atrial fibrillation

Research Project

Project/Area Number 21K19658
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 58:Society medicine, nursing, and related fields
Research InstitutionOita University

Principal Investigator

Takahashi Naohiko  大分大学, 医学部, 教授 (30263239)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords心外膜脂肪 / 心房細動 / CT値減衰度
Outline of Research at the Start

心房細動患者は数百万人にのぼり脳梗塞を高率に発症する。申請者は心房細動に関する基礎研究を15年以上にわたって行ってきた。最近では心臓手術時に得られた59例の心房細動患者の左心耳切片を検討し“心外膜脂肪そのものの線維化が顕著であるほど,隣接する心房筋に炎症性心房線維化が強く生じる”という新事実を明らかにし,これを“Fibrotic EAT”と名付けた。このFibrotic EATには悪玉サイトカイン(IL-6,MCP-1,TNF-α)が多く含まれ心房細動を進行させることも突き止めた。本研究の目的は,このFibrotic EATを検出可能な新たなCT画像診断テクノロジーを開発することである。

Outline of Final Research Achievements

We found that SGLT2 molecules are expressed in mesenchymal stem cells in the stroma of adipose tissue (= preadipocytes) and that their expression decreases as they differentiate into adipocytes. When adipogenic progenitor cells were induced to differentiate while treated with empagliflozin, the expression of PPARγ and CABPA, which are involved in adipogenesis, was not affected, but the expression of FABP4, a marker of adipogenesis, was decreased, and the amount of fat droplets formed was also reduced. In addition, several inflammatory cytokine genes were also suppressed, and oxidative stress in cardiomyocytes given via paracrine effects was reduced in the co-culture experiments.

Academic Significance and Societal Importance of the Research Achievements

我々はSGLT2阻害薬が脂肪前駆細胞に作用して脂肪成熟を抑制することを示した。これまでに臨床所見として報告されているEAT量の減少効果は、脂肪組織のターンオーバーを遅延させることで生じている可能性がある。また、本研究によってSGLT2阻害薬は脂肪細胞における炎症性を改善し、隣接する心筋の酸化ストレスを軽減させることも明らかとなった。臨床で認められているSGLT2阻害薬のEAT減少効果を解明した点で学術的意義がある。SGLT2阻害薬は既に市販されており,今後EATの量を減らし質を改善する薬剤として有効である可能性を示した点で社会的意義がある。

Report

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

    (8 results)

All 2024 2023 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (4 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Empagliflozin Suppresses the Differentiation/Maturation of Human Epicardial Preadipocytes and Improves Paracrine Secretome Profile2023

    • Author(s)
      Takano Masayuki、Kondo Hidekazu、Harada Taisuke、Takahashi Masaki、Ishii Yumi、Yamasaki Hirochika、Shan Tong、Akiyoshi Kumiko、Shuto Takashi、Teshima Yasushi、Wada Tomoyuki、Yufu Kunio、Sako Hidenori、Anai Hirofumi、Miyamoto Shinji、Takahashi Naohiko
    • Journal Title

      JACC: Basic to Translational Science

      Volume: 8 Issue: 9 Pages: 1081-1097

    • DOI

      10.1016/j.jacbts.2023.05.007

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Histological validation of atrial structural remodelling in patients with atrial fibrillation2023

    • Author(s)
      Yuya Takahashi, Takanori Yamaguchi, Toyokazu Otsubo, Kana Nakashima, Kodai Shinzato, Ryosuke Osako, Shigeki Shichida, Yuki Kawano, Akira Fukui, Atsushi Kawaguchi, Shinichi Aishima, Tsunenori Saito, Naohiko Takahashi, Koichi Node
    • Journal Title

      European Heart Journal

      Volume: 44 Issue: 35 Pages: 3339-3353

    • DOI

      10.1093/eurheartj/ehad396

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of epicardial adipose tissue in human atrial fibrillation2023

    • Author(s)
      Naohiko Takahashi, Ichitaro Abe, Shintaro Kira, Yumi Ishii
    • Journal Title

      Journal of Arrhythmia

      Volume: Feb 19;39(2) Issue: 2 Pages: 93-110

    • DOI

      10.1002/joa3.12825

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of fibrotic remodeling of epicardial adipose tissue in patients with atrial fibrillation: Imaging approach based on histological observation2021

    • Author(s)
      Ishii Yumi、Abe Ichitaro、Kira Shintaro、Harada Taisuke、Takano Masayuki、Oniki Takahiro、Kondo Hidekazu、Teshima Yasushi、Yufu Kunio、Shuto Takashi、Wada Tomoyuki、Nakagawa Mikiko、Shimada Tatsuo、Asayama Yoshiki、Miyamoto Shinji、Takahashi Naohiko
    • Journal Title

      Heart Rhythm O2

      Volume: 2 Issue: 4 Pages: 311-323

    • DOI

      10.1016/j.hroo.2021.05.006

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Promotion of Atrial Lymphangiogenesis Attenuates AngiotensinII-Induced Atrial Fibrosis and Fibrillation2024

    • Author(s)
      Takahashi M, et al.
    • Organizer
      日本循環器学会学術大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Novel Role of Human Epicardial Adipocyte-derived SPARCL1 in Patients with Postoperative2024

    • Author(s)
      Harada M, et al.
    • Organizer
      日本循環器学会学術大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Qualitative alteration of Epicardial adipose tissue and Atrial myocardial fibrosis as a substrate of Atrial fibrillation2023

    • Author(s)
      Takahashi N
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Detecting Fibrotic Remodeling of Epicardial Adipose Tissue in Patients with Atrial Fibrillation2021

    • Author(s)
      Ishii Y, Abe I, harada T, Takano M, Kira S, Kondo H, Teshima Y, yufu K, Nakagawa M, Shimada T, Miyamoto S, Takahashi N.
    • Organizer
      第85回日本循環器学会学術集会 3.26-28,2021. 横浜web
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2025-01-30  

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