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Development of an animal model of post-stroke recrudescence and its imaging with diffusion tensor imaging

Research Project

Project/Area Number 20K09311
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55060:Emergency medicine-related
Research InstitutionIwate Medical University

Principal Investigator

Akamatsu Yosuke  岩手医科大学, 医学部, 講師 (70835280)

Co-Investigator(Kenkyū-buntansha) 千田 光平  岩手医科大学, 医学部, 助教 (30611016)
藤原 俊朗  岩手医科大学, 薬学部, 講師 (60405842)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords既往脳卒中症状の再燃 / 感染症 / 拡散テンソル / 脳卒中後疲労 / 脳卒中後認知機能障害 / neuroinflammation / stroke recruedscence / magnetic resonance image / diffusion tensor imaging / stroke / recrudescence / 脳卒中症状の再燃 / 炎症 / 脳卒中慢性期 / 白質障害
Outline of Research at the Start

脳卒中の既往を有する患者が、慢性期に感染を契機に既往の脳卒中症状の再燃を理由に救急受診することがあるが、これまで臨床経験に基づく報告があるのみで基礎研究は行われておらず病態は不明である。本研究では、マウス脳梗塞モデルの慢性期に全身性炎症を惹起して本病態を再現し、拡散テンソル画像を用いた病変の可視化と組織学的検討から神経障害の機序を解明し、本病態の予防法もしくは治療法の可能性を追求することである。

Outline of Final Research Achievements

In the present study, we aimed to develop animal model of post-stroke recrudescence (PSR) by inducing systemic inflammation at chronic stroke setting and detect white matter injury in the stroke model based on the value of fraction anisotropy calculated with diffusion tensor imaging at ultra-high field magnetic resonance imaging. In animal experiments, significant difference between the PSR group and non-PSR group in the value of fraction could not be detected, which might be related with unstable imaging condition. Besides that, by reviewing recent clinical and preclinical studies, correlation between upregulated immune responses to brain antigens and PSR, post-stroke fatigue, and dementia of which are associated with poor long-term stroke outcome were indicated. Therefore, the future of improving long-term stroke outcome could be bright with more accurate pre-clinical study focusing on the role of autoimmune response. Those contents were published as a review article.

Academic Significance and Societal Importance of the Research Achievements

既往脳卒中症状の再燃は、救急外来に脳卒中症状で来院する患者さんの10%を占めることが知られているが、病態は不明で治療法は確立していない。本研究では、動物モデルにおいて放射線画像上の大脳白質障害を指摘するに至らなかった。しかし、動物を用いた基礎研究や実際の患者さんの検体を用いた臨床研究から、脳卒中後の長期的な患者転帰に関わる脳卒中後疲労や認知症は脳細胞に対する免疫応答を介して起こることが示唆され、感染症を契機に起こることが多い既往脳卒中症状の再燃の病態に類似することは学術的意義がある。また、これらの病態の更なる解明が進むことで、脳卒中が後発する高齢者のADL改善が期待でき社会的な意義がある。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (16 results)

All 2024 2023 2022 2021 2020

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 9 results,  Open Access: 6 results) Presentation (7 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Correlation Between Low-Density Hematoma at 1-Week Post-Middle Meningeal Artery Embolization and Rapid Resolution of Chronic Subdural Hematoma2024

    • Author(s)
      Akamatsu Yosuke、Kashimura Hiroshi、Kojima Daigo、Yoshida Jun、Chika Kohei、Komoribayashi Nobukazu、Fujiwara Shunrou、Ogasawara Kuniaki
    • Journal Title

      World Neurosurgery

      Volume: 181 Pages: e1088-e1092

    • DOI

      10.1016/j.wneu.2023.11.045

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spontaneous middle meningeal arteriovenous fistula without cortical venous reflux presenting with acute subdural hematoma: illustrative case2023

    • Author(s)
      Yabuki Masahiro、Akamatsu Yosuke、Kashimura Hiroshi、Kubo Yoshitaka、Ogasawara Kuniaki
    • Journal Title

      Journal of Neurosurgery: Case Lessons

      Volume: 6 Issue: 6

    • DOI

      10.3171/case23306

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endovascular embolization and needle aspiration of a life-threatening cervical hematoma due to a neurofibromatosis type 1?associated arteriovenous fistula: illustrative case2023

    • Author(s)
      Kojima Daigo、Akamatsu Yosuke、Aso Kenta、Kimura Kazuto、Matsumoto Yoshiyasu、Sato Shinpei、Kashimura Hiroshi、Kubo Yoshitaka、Ogasawara Kuniaki
    • Journal Title

      Journal of Neurosurgery: Case Lessons

      Volume: 5 Issue: 4 Pages: 1-5

    • DOI

      10.3171/case22537

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Using a low-metal?density stent for thrombectomy-resistant vertebrobasilar occlusion due to thrombus migration from a thrombosed vertebral artery aneurysm: illustrative case2023

    • Author(s)
      Yoshida Koji、Akamatsu Yosuke、Tsutsui Shota、Ogasawara Yasushi、Misaki Toshinari、Konno Hiromu、Ogasawara Kuniaki
    • Journal Title

      Journal of Neurosurgery: Case Lessons

      Volume: 5 Issue: 19

    • DOI

      10.3171/case23107

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Delayed blink R1 latency in a patient with trigeminal neuralgia due to a contralateral vestibular schwannoma: An illustrative case2023

    • Author(s)
      Oshida Sotaro、Saura Hiroaki、Akamatsu Yosuke、Yanagihara Wataru、Fujimoto Kentaro、Nagasawa Kazuki、Takahashi Kodai、Ogasawara Kuniaki
    • Journal Title

      Surgical Neurology International

      Volume: 14 Pages: 284-284

    • DOI

      10.25259/sni_422_2023

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endovascular intervention for bilateral paramedian thalamic stroke due to occlusion of the unilateral P1 segment of the posterior cerebral artery: illustrative cases2022

    • Author(s)
      Jun Yoshida, Yosuke Akamatsu, Daigo Kojima, Kenya Miyoshi, Hiroshi Kashimura, Kuniaki Ogasawara
    • Journal Title

      Journal of Neurosurgery Case Lessons

      Volume: 4(2) Issue: 2

    • DOI

      10.3171/case22152

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Post-stroke recrudescence-a possible connection to autoimmunity?2021

    • Author(s)
      Yosuke Akamatsu, Hersh J. Chaitin, Khalid A. Hanafy
    • Journal Title

      Reviews in the neurosciences

      Volume: 6 Issue: 2 Pages: 207-212

    • DOI

      10.1515/revneuro-2021-0062

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The role of TLR4 and HO-1 in neuroinflammation after subarachnoid hemorrhage2020

    • Author(s)
      Yosuke Akamatsu, Vicente A Pagan, Khalid A Hanafy
    • Journal Title

      Journal of Neuroscience Research

      Volume: 98 Issue: 3 Pages: 549-556

    • DOI

      10.1002/jnr.24515

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cell Death and Recovery in Traumatic Brain Injury2020

    • Author(s)
      Yosuke Akamatsu, Khalid A Hanafy
    • Journal Title

      Neurotherapeutics

      Volume: 17 Issue: 2 Pages: 446-456

    • DOI

      10.1007/s13311-020-00840-7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] クラゾセンタンとループ利尿薬を併用したくも膜下出血術後の水分管理2024

    • Author(s)
      赤松洋祐、千田光平、*小島大吾、幸治孝裕、藤原俊朗、*樫村博史、久保慶高、小笠原邦昭
    • Organizer
      STROKE2024 (第40回SAH/スパズム・シンポジウム)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Particleを用いた中硬膜動脈塞栓術1週間後の慢性硬膜下血腫low densityは早期血腫減少に関連する2023

    • Author(s)
      赤松洋祐、樫村博史、小島大吾、千田光平、藤原俊朗、小守林靖一、三﨑俊斎、久保慶高、小笠原邦昭
    • Organizer
      第39回日本脳神経血管内治療学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Safety and feasibility of using 8-French balloon guiding catheter through the radial artery for treating cerebrovascular disease.2023

    • Author(s)
      Akamatsu Y., Chida K., *Kojima D., *Kashimura H., Ogasawara K.
    • Organizer
      The 16th Korea-Japan Joint Conference on Surgery for Cerebral Stroke(KJJC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Feasibility of high-order signal model for assessing cerebrospinal fluid dynamics using diffusion-weighted imaging.2023

    • Author(s)
      Fujiwara S, Ogasawara K, Chida K, Akamatsu Y, Koji T, Miyoshi K, Oikawa K, Yoshida J, Kubo Y, Yoshioka Y.
    • Organizer
      European Society of Neuroradiology 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Diffusion-weighted imaging-based fluidography for assessing cerebrospinal fluid dynamics in the brains.2023

    • Author(s)
      Fujiwara S, Ogasawara K, Chida K, Akamatsu Y, Koji T, Miyoshi K, Oikawa K, Yoshida J, Kubo Y, Yoshioka Y.
    • Organizer
      International Society for Magnetic Resonance in Medicine 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] PARTIAL REMOVAL OF THE ANTERIOR INSULAR CORTEX FOR CLIPPING OF MIDDLE CEREBRAL ARTERY ANEURYSMS LOCATED IN THE LIMEN RECESS2022

    • Author(s)
      Yosuke Akamatsu, Hiroshi Kashimura, Shunrou Fujiwara, Yoshitaka Kubo, Kuniaki Ogasawara
    • Organizer
      10th European-Japanese Cerebrovascular Congress(10th EJCVC)
    • Related Report
      2022 Research-status Report
  • [Presentation] 慢性硬膜下血腫に対する中硬膜動脈塞栓術後の画像・臨床転帰2022

    • Author(s)
      赤松洋祐、三﨑俊斎、千田光平、樫村博史、小守林靖一、久保慶高、小笠原邦昭
    • Organizer
      第38回NPO法人日本脳神経血管内治療学会学術集会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-12-26  

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