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2017 Fiscal Year Research-status Report

肺高血圧症の閉塞性病変進展における炎症誘導機構の解明および新規治療法の開発

Research Project

Project/Area Number 17K09591
Research InstitutionKyushu University

Principal Investigator

阿部 弘太郎  九州大学, 大学病院, 助教 (20588107)

Co-Investigator(Kenkyū-buntansha) 筒井 裕之  九州大学, 医学研究院, 教授 (70264017)
Project Period (FY) 2017-04-01 – 2020-03-31
Keywords肺高血圧症 / 炎症 / 閉塞性病変 / 血行動態ストレス
Outline of Annual Research Achievements

肺動脈性肺高血圧症の閉塞性血管病変の進展・維持には、腫瘍様異常細胞の増殖が主で、血行動態ストレスの病態的役割は非常に少ないと考えられていた。一方、申請者は、自身が開発した新生内膜・叢状病変(plexiform lesion)など閉塞性病変を示す疾患モデル(Abe K, et al. Circulation 2010)に、片肺動脈縮窄により血行動態ストレスを軽減すると、炎症が抑制され閉塞性病変が退縮することを報告した (Abe K, et al. Cardiovasc Res. 2016)。本研究は、血行動態ストレスが炎症を介し肺血管閉塞性病変の進展・維持するという新たなパラダイムのもと、炎症と閉塞性肺血管病変の進展・維持機構を解明し、新たな難治性肺高血圧症の治療戦略の確立を目的とする。
肺高血圧症ラットモデル(Su/Hx/Nxモデル)における血行動態ストレスを起点として誘導されるtoll-like receptor 9 (TLR9)の活性化、および無菌性炎症と閉塞性肺血管病変の進展・増悪機構を解明し、新たな難治性肺高血圧症の治療戦略を確立することを目的とする。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

当初の予定通り。肺高血圧症モデル動物に対して閉塞性血管病変の進展におけるサイトカイ、特にIL6の測定とその上流シグナルの解析を行った。研究成果は、国内外の主要学会のシンポジウム等で口述発表に採択された。

Strategy for Future Research Activity

TLR9活性化を介した閉塞性血管病変の進展における炎症誘導機構の解明を行う。重症化した肺高血圧モデルに対して、TLR9阻害剤を投与し、血漿・肺組織におけるサイトカインを測定し、無菌性炎症にミトコンドリア障害とTLR9活性化が直接的に関わっていることを明らかにする。現時点で研究計画遂行における問題点は特にない。

  • Research Products

    (14 results)

All 2018 2017

All Journal Article (9 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 9 results) Presentation (5 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results)

  • [Journal Article] Balloon Pulmonary Angioplasty Relieves Hemodynamic Stress towards Untreated-Side Pulmonary Vasculature and Ameliorates Its Resistance in Patients with Chronic Thromboembolic Pulmonary Hypertension.2018

    • Author(s)
      Hosokawa K, Abe K, Horimoto K, Yamasaki Y, Nagao M, Tsutsui H.
    • Journal Title

      EuroIntervention

      Volume: 13 Pages: 2069-2076.

    • DOI

      10.4244/EIJ-D-17-00888.

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inhibition of Nitric Oxide Synthase Unmasks Vigorous Vasoconstriction in Established Pulmonary Arterial Hypertension.2017

    • Author(s)
      Tanaka M, Abe K, Oka M, Saku K, Yoshida K, Ishikawa T, McMurtry IF, Sunagawa K, Hoka S, Tsutsui H.
    • Journal Title

      Physiol Rep

      Volume: 5 Pages: 275-276

    • DOI

      10.14814/phy2.13537.

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Delayed-onset Lung Injury After Balloon Pulmonary Angioplasty.2017

    • Author(s)
      Hosokawa K, Yamamoto T, Abe K, Tsutsui H.
    • Journal Title

      Eur Heart J Cardiovasc Imaging.

      Volume: 18(12) Pages: 1426

    • DOI

      10.1093/ehjci/jex210.

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Three Dimensional SPECT/CT Fusion Imaging Guided Balloon Pulmonary Angioplasty for Chronic Thromboembolic Pulmonary Hypertension.2017

    • Author(s)
      Hosokawa K, Abe K, Kashihara S, Tsutsui H.
    • Journal Title

      JACC Cardiovasc Interv.

      Volume: 10 Pages: e193-e194

    • DOI

      10.1016/j.jcin.2017.07.038.

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effectiveness and Outcome of Pulmonary Arterial Hypertension-Specific Therapy in Japanese Patients With Pulmonary Arterial Hypertension.2017

    • Author(s)
      Tamura Y, Kumamaru H, Satoh T, Miyata H, Ogawa A, Tanabe N, Hatano M, Yao A, Abe K, Tsujino I, Fukuda K, Kimura H, Kuwana M, Matsubara H, Tatsumi K
    • Journal Title

      Circ J.

      Volume: 25 Pages: 275-282

    • DOI

      10.1253/circj.CJ-17-0139.

    • Peer Reviewed
  • [Journal Article] Three-dimensional fractal analysis of 99mTc-MAA SPECT images in chronic thromboembolic pulmonary hypertension for evaluation of response to balloon pulmonary angioplasty: association with pulmonary arterial pressure.2017

    • Author(s)
      Maruoka Y, Nagao M, Baba S, Isoda T, Kitamura Y, Yamazaki Y, Abe K, Sasaki M, Abe K, Honda H.
    • Journal Title

      Nucl Med Commun.

      Volume: 38 Pages: 480-486

    • DOI

      10.1097/MNM.0000000000000673.

    • Peer Reviewed
  • [Journal Article] Three-dimensional phase contrast magnetic resonance imaging validated to assess pulmonary artery flow in patients with chronic thromboembolic pulmonary hypertension.2017

    • Author(s)
      Kawakubo M, Akamine H, Yamasaki Y, Takemura A, Abe K, Hosokawa K, Morishita J, Nagao M.
    • Journal Title

      Radiol Phys Technol.

      Volume: 10 Pages: 249-255

    • DOI

      10.1007/s12194-016-0383-0.

    • Peer Reviewed
  • [Journal Article] Subcutaneous Treprostinil was Effective and Tolerable in a Patient with Severe Pulmonary Hypertension Associated with Chronic Kidney Disease on Hemodialysis.2017

    • Author(s)
      Watanabe N, Abe K, Horimoto K, Hosokawa K, Ohtani K, Tsutsui H.
    • Journal Title

      Heart Lung

      Volume: 46 Pages: 129-130

    • DOI

      10.1016/j.hrtlng.2017.01.004.

    • Peer Reviewed
  • [Journal Article] Energy efficiency and pulmonary artery flow after balloon pulmonary angioplasty for inoperable, chronic thromboembolic pulmonary hypertension: Analysis by phase-contrast MRI.2017

    • Author(s)
      Nagao M, Yamasaki Y, Abe K, Hosokawa K, Kawanami S, Kamitani T, Yamanouchi Y, Yabuuchi H, Fukushima K, Honda H.
    • Journal Title

      European Journal of Radiology.

      Volume: 87 Pages: 99-104

    • DOI

      10.1016/j.ejrad.2016.12.015.

    • Peer Reviewed
  • [Presentation] Hemodynamic Stress Is the Most Important Driver in the Pathogenesis of Occlusive Neointimal Lesions in PAH.2017

    • Author(s)
      Abe K
    • Organizer
      2017 American Thoracic Society International Conference
    • Int'l Joint Research / Invited
  • [Presentation] (Plenary Session) Update on management of Pulmonary Hypertension2017

    • Author(s)
      Abe K
    • Organizer
      The 26th Annual Scientific meeting of the Indonesian Heart Association
    • Int'l Joint Research / Invited
  • [Presentation] (ASMIHA-JCS Joint Symposium) Balloon Pulmonary Angioplasty in Patients with CTEPH2017

    • Author(s)
      Abe K
    • Organizer
      The 26th Annual Scientific meeting of the Indonesian Heart Association
    • Int'l Joint Research / Invited
  • [Presentation] Vasoconstriction Plays a Crucial Role in Severe Pulmonary Arterial Hypertension2017

    • Author(s)
      Abe K
    • Organizer
      第82回日本循環器学会学術集会
    • Invited
  • [Presentation] Inhibition of nitric oxide synthase unmasks potent vasoconstriction in established pulmonary arterial hypertension2017

    • Author(s)
      Abe K
    • Organizer
      2018 6th World Symposium on Pulmonary Hypertension
    • Int'l Joint Research

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Published: 2018-12-17  

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