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Elucidation of the involvement of the cardiovascular mechanosensor TRPV2 in hypoxia-induced pulmonary hypertension and development of a therapeutic approach

Research Project

Project/Area Number 21K08108
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionOkayama University

Principal Investigator

Kazufumi Nakamura  岡山大学, 医歯薬学域, 准教授 (10335630)

Co-Investigator(Kenkyū-buntansha) 鵜殿 平一郎  岡山大学, 医歯薬学域, 教授 (50260659)
片野坂 友紀  金城学院大学, 薬学部, 准教授 (60432639)
赤木 達  岡山大学, 医歯薬学域, 助教 (60601127)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords肺高血圧症 / 低酸素性肺血管攣縮 / 肺血管リモデリング / TRPV2 / メカノセンサー / 肺動脈平滑筋細胞 / Ca2+応答 / ストレッチ / 低酸素症 / 血管平滑筋特異的TRPV2欠損マウス / IGFBP3 / MTTアッセイ / 肺動脈性肺高血圧症 / 心血管メカノセンサー
Outline of Research at the Start

低酸素性肺血管攣縮とその後ひきおこされる肺血管リモデリングによる肺動脈性肺高血圧症発症の機序はよく分かっていない。慢性閉塞性肺疾患(COPD)・間質性肺疾患などの肺疾患における肺高血圧症・右心不全の原因の一つと考えられており、その現象の機序の解明とそれをターゲットとした治療の開発が望まれている。本研究では「血管平滑筋において伸展等により活性化される心血管メカノセンサー(機械受容体)分子である TRPV2 が低酸素誘発性肺高血圧症に関与し、その制御が治療につながるのではないか?」と考え検討を行うこととした。

Outline of Final Research Achievements

Persistent hypoxia causes pulmonary vasoconstriction, leading to pulmonary hypertension, and TRPV2, a Ca2+-permeable cation channel, is a mechanosensor that responds to membrane stretch of vascular smooth muscle. The purpose of this study was to determine the role of TRPV2 in the pathogenesis of hypoxia-induced pulmonary hypertension.
We observed that pulmonary arteries from vascular smooth muscle-specific TRPV2-deficient and control mice exhibited reduced hypoxic pulmonary vasoconstriction in TRPV2-deficient mice, while Ca2+ responses to cell stretch and hypoosmotic stimuli were attenuated in TRPV2-deficient mice. Furthermore, hypoxia-induced pulmonary hypertension was improved in TRPV2-deficient mice compared to controls.

Academic Significance and Societal Importance of the Research Achievements

低酸素性肺血管攣縮とその後ひきおこされる肺血管リモデリングによる肺動脈性肺高血圧症発症の機序はよく分かっていない。慢性閉塞性肺疾患(COPD)・間質性肺疾患などの肺疾患における肺高血圧症・右心不全の原因の一つと考えられており、その現象の機序の解明とそれをターゲットとした治療の開発が望まれている。本研究ではTRPV2が低酸素性肺血管攣縮と肺血管リモデリングによる肺動脈性肺高血圧症発症に関与することが判明し、ノックアウトすることにより肺高血圧が改善することがわかった。すなわちTRPV2は治療標的であり、今後創薬などの展開が期待される。

Report

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

    (21 results)

All 2024 2023 2022 2021 2020

All Journal Article (15 results) (of which Peer Reviewed: 10 results,  Open Access: 5 results) Presentation (6 results) (of which Invited: 2 results)

  • [Journal Article] Feasibility of Treat and Repair Strategy in?Congenital Heart Defects With Pulmonary Arterial Hypertension2024

    • Author(s)
      Akagi Satoshi、Kasahara Shingo、Akagi Teiji、Ejiri Kentaro、Mitsuhashi Toshiharu、Nakagawa Koji、Nakamura Kazufumi、Ito Hiroshi
    • Journal Title

      JACC: Advances

      Volume: 3 Issue: 4 Pages: 100887-100887

    • DOI

      10.1016/j.jacadv.2024.100887

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Shear Wave Dispersion Slope of the Liver Can Predict Adverse Outcomes in Patients with Pulmonary Hypertension2023

    • Author(s)
      Urabe Chikara、Takaya Yoichi、Nakayama Rie、Nakamura Kazufumi、Ito Hiroshi
    • Journal Title

      International Heart Journal

      Volume: 64 Issue: 2 Pages: 230-236

    • DOI

      10.1536/ihj.22-574

    • ISSN
      1349-2365, 1349-3299
    • Year and Date
      2023-03-31
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evidence for Hypoxia-Induced Shift in ATP Production from Glycolysis to Mitochondrial Respiration in Pulmonary Artery Smooth Muscle Cells in Pulmonary Arterial Hypertension2023

    • Author(s)
      Akagi Satoshi、Nakamura Kazufumi、Kondo Megumi、Hirohata Satoshi、Udono Heiichiro、Nishida Mikako、Saito Yukihiro、Yoshida Masashi、Miyoshi Toru、Ito Hiroshi
    • Journal Title

      Journal of Clinical Medicine

      Volume: 12 Issue: 15 Pages: 5028-5028

    • DOI

      10.3390/jcm12155028

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Use of the index of pulmonary vascular disease for predicting long-term outcome of pulmonary arterial hypertension associated with congenital heart disease2023

    • Author(s)
      Chida-Nagai Ayako、Masaki Naoki、Ohashi Naoki、Saiki Yoshikatsu、他
    • Journal Title

      Frontiers in Cardiovascular Medicine

      Volume: 10 Pages: 1-9

    • DOI

      10.3389/fcvm.2023.1212882

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of malnutrition on prognosis in patients with pulmonary arterial hypertension2023

    • Author(s)
      Nakashima Mitsutaka、Akagi Satoshi、Ejiri Kentaro、Nakamura Kazufumi、Ito Hiroshi
    • Journal Title

      Pulmonary Circulation

      Volume: 13 Issue: 3

    • DOI

      10.1002/pul2.12286

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantification of Lung Perfusion Blood Volume in Dual-Energy Computed Tomography in Patients with Pulmonary Hypertension2022

    • Author(s)
      Ugawa Satoko、Akagi Satoshi、Ejiri Kentaro、Nakamura Kazufumi、Ito Hiroshi
    • Journal Title

      Life

      Volume: 12 Issue: 5 Pages: 684-684

    • DOI

      10.3390/life12050684

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Efficacy of shear wave elasticity for predicting clinical outcomes in patients with significant tricuspid regurgitation2022

    • Author(s)
      Nakayama Rie、Takaya Yoichi、Nakamura Kazufumi、Takemoto Rika、Toh Norihisa、Ito Hiroshi
    • Journal Title

      Heart and Vessels

      Volume: 37 Issue: 11 Pages: 1866-1872

    • DOI

      10.1007/s00380-022-02084-1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] 低酸素性肺血管攣縮と肺高血圧症2022

    • Author(s)
      中村一文・赤木達・斎藤幸弘
    • Journal Title

      月刊「細胞」

      Volume: 54 Pages: 31-33

    • Related Report
      2022 Research-status Report
  • [Journal Article] 肺高血圧症における伸展活性化チャネルの関与2022

    • Author(s)
      中村一文・赤木達・片野坂友紀
    • Journal Title

      Precision Medicine

      Volume: 5 Pages: 63-65

    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Journal Article] 膠原病性肺動脈性肺高血圧症 専門家による私の治療2022

    • Author(s)
      中村一文
    • Journal Title

      日本医事新報

      Volume: 5116 Pages: 42-43

    • Related Report
      2022 Research-status Report
  • [Journal Article] 右心不全をひき起こす病態/疾患とは 特集 右心不全の話題2022

    • Author(s)
      中村一文、赤木達、岩﨑慶一朗、戸田洋伸
    • Journal Title

      循環器内科

      Volume: 91 Pages: 147-149

    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Journal Article] 肺循環の生理と肺動脈性肺高血圧症の病態生理からみたその治療2021

    • Author(s)
      中村一文、赤木 達、岩野貴之、江尻健太郎、杜 徳尚、伊藤 浩、清水一好、岩崎達雄
    • Journal Title

      Cardiovascular Anesthesia

      Volume: 25 Issue: 1 Pages: 7-12

    • DOI

      10.11478/jscva.2020-1-002

    • NAID

      130008104655

    • ISSN
      1342-9132, 1884-7439
    • Year and Date
      2021-08-01
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Efficacy of shear wave elastography for evaluating right ventricular myocardial fibrosis in monocrotaline-induced pulmonary hypertension rats2021

    • Author(s)
      Nakayama Rie、Takaya Yoichi、Nakamura Kazufumi、Kondo Megumi、Kobayashi Kaoru、Ohno Yuko、Amioka Naofumi、Akagi Satoshi、Yoshida Masashi、Miyoshi Toru、Ito Hiroshi
    • Journal Title

      Journal of Cardiology

      Volume: in press Issue: 1 Pages: 17-23

    • DOI

      10.1016/j.jjcc.2021.01.015

    • NAID

      120007189478

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 薬剤封入ナノ粒子を用いたDrug Delivery Systemによる肺動脈性肺高血圧の治療法開発2021

    • Author(s)
      中村一文、赤木 達、伊藤 浩
    • Journal Title

      Medical Science Digest

      Volume: 47 Pages: 43-45

    • Related Report
      2021 Research-status Report
  • [Journal Article] Inhibitory effects of RAGE-aptamer on development of monocrotaline-induced pulmonary arterial hypertension in rats2020

    • Author(s)
      Nakamura Kazufumi、Akagi Satoshi、Ejiri Kentaro、Yoshida Masashi、Miyoshi Toru、Sakaguchi Masakiyo、Amioka Naofumi、Suastika Luh Oliva Saraswati、Kondo Megumi、Nakayama Rie、Takaya Yoichi、Higashimoto Yuichiro、Fukami Kei、Matsubara Hiromi、Ito Hiroshi
    • Journal Title

      Journal of Cardiology

      Volume: - Issue: 1 Pages: 12-16

    • DOI

      10.1016/j.jjcc.2020.12.009

    • NAID

      120007182876

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Pivotal Role of TRPV2 in the Pathogenesis of Hypoxia-induced Pulmonary Hypertension2024

    • Author(s)
      Kazufumi Nakamura
    • Organizer
      第88回日本循環器学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] PoPHの診断と治療 -循環器内科医の立場から2022

    • Author(s)
      中村一文
    • Organizer
      心臓肝臓合同Webセミナー in Saitama
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Crucial Role of TRPV2 in the Development of Hypoxia-induced Pulmonary Hypertension2022

    • Author(s)
      Kazufumi Nakamura
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Crucial Role of TRPV2 in the Development of Hypoxia-induced Pulmonary Hypertension2022

    • Author(s)
      Nakamura K
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] TRPV2 Promotes Hypoxia-induced Pulmonary Hypertension2021

    • Author(s)
      Nakamura K
    • Organizer
      第85回日本循環器学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 病態生理からみた 肺高血圧症の診断と治療2021

    • Author(s)
      中村一文
    • Organizer
      第3回香川県肺高血圧症連携セミナー
    • Related Report
      2021 Research-status Report
    • Invited

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

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