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Novel interventional therapy improves collateral development and outcome after stroke

Research Project

Project/Area Number 20K09366
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56010:Neurosurgery-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Miki Kazunori  東京医科歯科大学, 大学院医歯学総合研究科, 非常勤講師 (00536823)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords脳動脈新生 / 脳血管障害 / arteriogenesis / スフィンゴシン1リン酸受容体1 / microRNA / 側副血行 / mRNA / 脳梗塞 / 動脈新生
Outline of Research at the Start

生来ヒトの脳では、普段は活用されていない多くの側副血行経路があり、主幹動脈閉塞による脳梗塞の場合、脳動脈側副血行路の発達した症例では梗塞に陥る領域が小さく、機能予後が良好であることが知られている。このため脳梗塞治療においては側副血行路を介した血流で脳梗塞拡大を防ぎ予後を改善させることは重要な治療ストラテジーの一つとなりうる。本研究の目的は、脳主幹動脈閉塞時に脳内で生じている側副血行活性化のメカニズムを解明し、脳軟膜動脈の発達を促す人為的側副血行賦活治療薬の経動脈投与を行うことにより、従来のバイパス治療などに取って代わる、新しいストラテジーの脳梗塞治療法を開発することである

Outline of Final Research Achievements

Collateral glows after acute ischemic stroke are triggered by shear stress, and sphingosine-1-phosphate receptor 1 (S1PR1) on endothelial cells was reported to sense shear stress and transduce its signaling pathways. We investigated the effect of an S1P1-selective agonist (SEW2871) on leptomeningeal collateral arteries in acute stroke model. Neurological functions, leptomeningeal arteries, and infarct volume were compared after treatment. S1P1 expression in endothelial cells was increased after CCAO and pMCAO. The number of leptomeningeal collateral arteries was significantly increased, and neurological outcome improved. Endothelial nitric oxide synthase (eNOS) phosphorylation and the expression of tight junction proteins was increased in the SEW2871 group. S1PR1 selective agonist has a role in promoting collateral growth and preventing of ischemic damage and neurological dysfunction after subsequent stroke in patients with intracranial major artery stenosis or occlusion.

Academic Significance and Societal Importance of the Research Achievements

脳梗塞治療として再開通療法と同時に、脳血流の低下を防ぎ、いかに梗塞に陥らせないかという治療戦略は重要であり、多くの脳梗塞症例に適応しうる。実際に我々は脳表の動脈新生の発達したヒト脳梗塞でが梗塞体積が少なく、機能予後が良好であること確認してきた。成体脳であっても脳梗塞後に新たな血管が形成される現象が認められ、特に血管内皮細胞だけでなく平滑筋、基底膜よりなる大口径の機能動脈のリモデリングを意味するArteriogenesis (動脈新生)が制御できれば、脳主幹動脈閉塞の場合に側副血行路を介した脳血流の保持が可能となるため動脈新生の発達を促す方法の開発が期待されているが、未だ開発されていない。

Report

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

    (5 results)

All 2023 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results)

  • [Journal Article] A case of ruptured dissecting aneurysm of middle cerebral artery treated with stent-assist coil embolization in subacute phase2023

    • Author(s)
      Miki Kazunori、Uketa Hiroto、Matsubara Keisuke、Kanenaka Naosuke、Abe Hajime、Yoshino Masanori、Sato Hiroaki
    • Journal Title

      Japanese Journal of Stroke

      Volume: 45 Issue: 2 Pages: 175-180

    • DOI

      10.3995/jstroke.11082

    • ISSN
      0912-0726, 1883-1923
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cerebral infarction due to arterial dissection and cerebral venous sinus thrombosis secondary to moderate COVID-19 infection in a young man: A case report2023

    • Author(s)
      Sato Yukitaka、Uketa Hiroto、Miki Kazunori、Matsubara Keisuke、Abe Hajime、Hinata Satoshi、Chiba Kaoru、Okabayashi Ken、Asato Yuko、Sato Hiroaki、Aono Hiromi
    • Journal Title

      Japanese Journal of Stroke

      Volume: 45 Issue: 5 Pages: 407-413

    • DOI

      10.3995/jstroke.11095

    • ISSN
      0912-0726, 1883-1923
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Combined Technique Thrombectomy with a Long Balloon-Guiding Catheter and Long Sheath Aids in Rapid and Stable Recanalization in Patients with Anterior Circulation Acute Ischemic Stroke2021

    • Author(s)
      Miki Kazunori、Aizawa Yuki、Fujii Shoko、Karakama Jun、Fujita Kyohei、Sasaki Yoshiyuki、Nemoto Shigeru、Sumita Kazutaka
    • Journal Title

      Journal of Neuroendovascular Therapy

      Volume: 15 Issue: 5 Pages: 281-287

    • DOI

      10.5797/jnet.oa.2020-0041

    • NAID

      130008040604

    • ISSN
      1882-4072, 2186-2494
    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Case of Idiopathic Intracranial Hypertension Treated by Transverse Sinus Stenting2021

    • Author(s)
      Miki Kazunori、Sumita Kazutaka、Fujii Shoko、Fujita Kyohei、Aizawa Yuki、Karakama Jun、Yoshino Yoshikazu、Emoto Hirofumi、Nemoto Shigeru
    • Journal Title

      Journal of Neuroendovascular Therapy

      Volume: 15 Issue: 10 Pages: 653-658

    • DOI

      10.5797/jnet.cr.2020-0145

    • NAID

      130008106350

    • ISSN
      1882-4072, 2186-2494
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effective silencing of miR-126 after ischemic stroke by means of intravenous α-tocopherol?conjugated heteroduplex oligonucleotide in mice2021

    • Author(s)
      Suzuki Motohiro、Ishibashi Satoru、Iwasawa Eri、Oguma Takahiro、Saito Yasuhiro、Li Fuying、Otsu Shinichi、Ichinose Keiko、Yoshioka Kotaro、Nagata Tetsuya、Yokota Takanori
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 14237-14237

    • DOI

      10.1038/s41598-021-93666-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2020-04-28   Modified: 2024-01-30  

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