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Fine structure and MRI image of the neurofluid drainage system in the human cerebral meninges, spinal nerve sheath

Research Project

Project/Area Number 22K09289
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56010:Neurosurgery-related
Research InstitutionOita University

Principal Investigator

Miura Masahiro  大分大学, 医学部, 講師 (50199957)

Co-Investigator(Kenkyū-buntansha) 山田 茂樹  名古屋市立大学, 医薬学総合研究院(医学), 講師 (40422969)
間瀬 光人  名古屋市立大学, 医薬学総合研究院(医学), 教授 (60238920)
内野 哲哉  大分大学, 医学部, 講師 (70423697)
高橋 浩一  国際医療福祉大学, 臨床医学研究センター, 非常勤講師 (90246413)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2024: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsNeurofluid / 髄液動態 / 脊髄神経根鞘 / MRI / 走査型電子顕微鏡 / 硬膜外リンパ系 / カニクイザル / 脈管外通液路 / 髄膜リンパ管 / MRI解析 / 脈管外液性通液路 / ガドリニウム髄注 / 脳脊髄液 / 走査電子顕微鏡解析 / ニューロフロイド / 脊髄神経根 / 髄膜-脈管外液性通液路 / 髄膜 / ガドリニウム / 髄膜バリア / グリンファティク システム / 脳血管周囲腔 / 神経関連液性成分 / 硬膜外リンパ管
Outline of Research at the Start

本申請課題は、脳・脊髄硬膜内リンパ管網に誘導される髄液ならびに脳内代謝産物・免疫細胞の(1)髄膜内侵入経路の解明、(2)硬膜線維内における髄膜リンパ管への脈管外通液路の機能的(注入トレーサー動態解析)・構造的特徴の全容解明(未解決の課題)、(3)髄液の脊髄神経根鞘への生理的漏出の本態解明、また、ヒト脳硬膜に潜在する髄膜-脈管外通液路の機能構造的特徴、さらに、サル・ヒト硬膜内リンパ管の形態学的特徴の解明も動物種差特異性に考慮して解析する。尚、得られた結果はマウス所見及び脊髄硬膜外リンパ管吸収路と比較検討することでヒト髄液循環再考の重要情報に反映(病態生理)する。

Outline of Final Research Achievements

Although the central nervous system (CNS) is an organ system with active neuronal metabolism and cerebrospinal fluid dynamics, the detailed site of extra-menigeal clearance in the CNS remains unclear. In this study, we re-examined the importance of a mechanism by which neurofluid is cleared from spinal nerve roots (lower CNS) via the meningeal lymphatic system, rather than the conventionally proposed pathway from the brain level to the main site of absorption. This was demonstrated by monitoring intrathecal gadolinium (Gd) dynamics using MRI in a monkey model. In addition, the dynamics of CH40 carbon particles throughout the central nervous system and laser Gd distribution analysis showed consistency with the MRI results, MRI results, suggesting that the neurofluid outflow pathway through each spinal nerve root is more important than the upper CNS. However, individual differences in CSF dynamics were also observed.

Academic Significance and Societal Importance of the Research Achievements

最近、産生機序が混在する脳脊髄液と脳間質液は同質の液体としてNeurofluidと呼ばれている。脳内では活発な神経代謝に伴う代謝産物と大量の間質液排出を担う非リンパ系排出機序、さらに脳室や髄腔におけるNeurofluid排液路はともに詳細は未だ明らかにされていない。本研究において、髄液循環異常に伴う正常圧水頭症、髄液漏出症、さらにアルツハイマー型痴呆症等の病態解明とそれらの治療戦略において、Neurofluidの脳レベルに潜在する排出機序の他に、髄液圧調節に関わる脊髄レベルに稼働する排出路の微細構造と生理的機能を明らかにしたことの学術的意義また社会学的意義は極めて大きいと考えられる。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (42 results)

All 2025 2024 2023 2022

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 8 results) Presentation (30 results) (of which Int'l Joint Research: 1 results,  Invited: 19 results) Book (2 results)

  • [Journal Article] 原著2024

    • Author(s)
      高橋浩一、三浦真弘
    • Journal Title

      日本頭痛学会誌

      Volume: 51 Pages: 72-78

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ヒト脳髄膜・脊髄神経根鞘内-Neurofluid排液システムの構造的特徴・MRI画像解析2024

    • Author(s)
      三浦真弘、内野哲哉、山田茂樹、渡邉嘉之
    • Journal Title

      Precision Medicine

      Volume: 7 Pages: 75-81

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ヒトNeurofluidの髄膜リンパ管を介する硬膜外排出システムの最新知見-微細構造学的・MRI画像解析を中心にして-2024

    • Author(s)
      三浦真弘、内野哲哉、高橋浩一、渡邉嘉之
    • Journal Title

      細胞

      Volume: 56 Pages: 43-49

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deep learning assessment of disproportionately enlarged subarachnoid-space hydrocephalus in Hakim’s disease or idiopathic normal pressure hydrocephalus2024

    • Author(s)
      Yamada Shigeki、Ito Hirotaka、Iseki Chifumi、Kondo Toshiyuki、Yamanaka Tomoyasu、Tanikawa Motoki、Otani Tomohiro、Ii Satoshi、Ohta Yasuyuki、Watanabe Yoshiyuki、Wada Shigeo、Oshima Marie、Mase Mitsuhito
    • Journal Title

      Radiology Advances

      Volume: 1 Issue: 3 Pages: 1-10

    • DOI

      10.1093/radadv/umae027

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cerebrospinal Fluid Production and Absorption and Ventricular Enlargement Mechanisms in Hydrocephalus2023

    • Author(s)
      Yamada Shigeki、Mase Mitsuhito
    • Journal Title

      Neurologia medico-chirurgica

      Volume: 63 Issue: 4 Pages: 141-151

    • DOI

      10.2176/jns-nmc.2022-0331

    • ISSN
      0470-8105, 1349-8029
    • Year and Date
      2023-04-15
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Case Report of Acute Cardiac Tamponade Creation in a Macaque: Echo-Guided Catheter Manipulation to Perforate Coronary Artery2023

    • Author(s)
      Takanari Hiroki、Okuyama Minami W、Kuroki Kohji、Kondo Hidekazu、Kira Shintaro、Miura Masahiro、Takahashi Naohiko、Okuda Takahisa
    • Journal Title

      Yonago Acta Medica

      Volume: 66 Issue: 1 Pages: 192-195

    • DOI

      10.33160/yam.2023.02.022

    • ISSN
      0513-5710, 1346-8049
    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sonographic diagnosis and evaluation in patients with superficial radial arteries.2023

    • Author(s)
      Uchino T, Miura M, Matsumoto S, Shingu C, Kitano T.
    • Journal Title

      J Vasc Access.

      Volume: 13 Issue: 6 Pages: 1786-1792

    • DOI

      10.1177/11297298231164661

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Development of Peritoneal Metastasis from Gastric Cancer and Rationale of Treatment According to the Mechanism.2022

    • Author(s)
      Yonemura Y., Ishibashi H., Mizumoto A., Tukiyama G., Liu Y., Wakama S., Sako S., Takao N., Kitai T., Katayama K., Kamada Y.,Taniguchi K., Fujimoto D., Endou Y., Miura M.
    • Journal Title

      J. Clin. Med.

      Volume: 11 Issue: 2 Pages: 1-25

    • DOI

      10.3390/jcm11020458

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of three obturator nerve block techniques for injectate spread into the obturator canal: a randomized controlled trial2022

    • Author(s)
      Uchino Tetsuya、Miura Masahiro、Matsumoto Shigekiyo、Shingu Chihiro、Shin Toshitaka、Tomonari Kenichiro、Kitano Takaaki
    • Journal Title

      Journal of Anesthesia

      Volume: ー Issue: 3 Pages: 383-389

    • DOI

      10.1007/s00540-022-03055-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 最新のNeurofluidの吸収機序 - extravascular fluid pathwaysと髄 膜リンパ管の連関吸収メカニズムを中心にして2022

    • Author(s)
      三浦真弘、内野哲哉、山田茂樹
    • Journal Title

      Journal of the Autonomic Nervous System

      Volume: 59 Pages: 110-124

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 演題タイトル:脳脊髄液bulk flow吸収概念が提唱されて100年 -最新のNeurofluidの経リンパ管-硬膜外排出メカニズム-2025

    • Author(s)
      三浦真弘、高橋浩一
    • Organizer
      日本脳脊髄液漏出症学会総会2025
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Human ACE points and Parasagittal dural space - An anatomical and histological analyses-2024

    • Author(s)
      Masahiro Miura
    • Organizer
      Kyoto Neurofluid Forum 2024
    • Related Report
      2024 Annual Research Report
  • [Presentation] リンパ浮腫に合併する「蜂窩織炎」は皮下間質においてリンパ管機能・脈管外-通液路閉塞を誘発する2024

    • Author(s)
      三浦真弘
    • Organizer
      第8回日本リンパ浮腫治療学会総会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Dynamics and function of cerebrospinal fluid for differences between spontaneous intracranial hypotension (SIH) and idiopathic normal pressure hydrocephalus (iNPH)2024

    • Author(s)
      Koichi Takahashi, Masahiro Miura,
    • Organizer
      日本脳脊髄液漏出症学会総会2024
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] The classical concept of CSF bulk flow absorption underwent a major transformation in 2024  : epidural drainage mechanism of the latest neurofluid via the meningeal lymphatics.2024

    • Author(s)
      三浦真弘、山田茂樹、間瀬光人
    • Organizer
      第67回日本脳循環代謝学会学術集会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 生理的髄液吸収に関する脈管外液性通路の走査電子顕微鏡学的検討 -脊髄硬膜外リンパ系に排導される髄液吸収メカニズム-2024

    • Author(s)
      三浦真弘、山田茂樹、間瀬光人
    • Organizer
      第25回日本正常圧水頭症学会総会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 神経疼痛性疼痛に必要な臨床解剖学2024

    • Author(s)
      三浦真弘
    • Organizer
      第11回日本区域麻酔学会総会サテライト
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Scanning electron microscopic analysis of the spinal meningeal-extravascular fluid pathway related to physiological cerebrospinal fluid absorption: neurofluid drainage system via the spinal epidural lymphatic vessel2024

    • Author(s)
      Masahiro Miura, Tetsuya Uchino
    • Organizer
      第129回日本解剖学会総会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 脳脊髄液の硬膜外排出には髄膜リンパ管が重要な役割を担う -最新のneurofluid吸収システム-2024

    • Author(s)
      三浦真弘
    • Organizer
      第40回日本脳神経血管内治療学会学術集会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Re-evaluation of the innervation pattern of the articular branches in the hip joint - With special reference to the anatomical relationship with the obturator nerve2024

    • Author(s)
      Masahiro Miura, Tetsuya Uchino
    • Organizer
      第11回日本区域麻酔学会総会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Scanning electron microscopic analysis of the spinal meningeal extravascular fluid pathways in the cerebrospinal fluid absorption: neurofluid drainage via the epidural lymphatic system2024

    • Author(s)
      Miura M, Yamada S, Masae M
    • Organizer
      The 24th Annual Meeting of the Japanese Society of NPH
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Scanning electron microscopic analysis of the spinal meningeal-extravascular fluid pathway related to physiological cerebrospinal fluid absorption : neurofluid drainage system via the spinal epidural lymphatic vessel2024

    • Author(s)
      Miura M, Uchino T
    • Organizer
      第129回日本解剖学会総会
    • Related Report
      2023 Research-status Report
  • [Presentation] 神経疼痛性疼痛に必要な臨床解剖学 - 体壁・体肢の層構造と神経走行との関係について-2024

    • Author(s)
      三浦 真弘
    • Organizer
      神経障害性疼痛と治療を考える研究会
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] New mechanisms for the efflux of neurofluids and neurometabolites: key relationships between the functions of meningeal lymphatic vessels and extravascular fluid pathways2023

    • Author(s)
      Miura M
    • Organizer
      4th Congress of Asian-Australasian Society for Pediatric Neurosurgery
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Latest knowledge of the clearance mechanism of the neurofluid and metabolic products to epidural vascular system with special reference to the absorptive pathway of trans-lymphatic neurofluid delivery system2023

    • Author(s)
      Miura M, Yamada S
    • Organizer
      STROKE 2023, SAH symposium
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] 最新のNeurofluidと神経代謝産物の硬膜外排出機序について-髄膜関連リンパ管吸収路を中心にして-2023

    • Author(s)
      三浦 真弘
    • Organizer
      第15回日本水頭症脳脊髄液学会総会
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Gadolinium髄注-MRI解析からNeurofluid吸収路の検証・再考2023

    • Author(s)
      三浦 真弘、山田茂樹、間瀬光人
    • Organizer
      第30回日本神経内視鏡学会総会 ランチョンセミナー
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] 最新Neurofluidの硬膜外排出メカニズムについて2023

    • Author(s)
      三浦 真弘
    • Organizer
      第10回東京脈管神経血管内治療学会
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Pathogenesis and treatment modality for cerebrospinal fluid leak2023

    • Author(s)
      高橋 浩一, 三浦 真弘
    • Organizer
      第51回日本頭痛学会総会
    • Related Report
      2023 Research-status Report
  • [Presentation] カニクイザルGd髄注-MRI解析からNeurofluid吸収路の検証・再考2023

    • Author(s)
      三浦 真弘 、渡邊嘉之 、山田茂樹 、間瀬光人
    • Organizer
      京都髄液フォーラム2023
    • Related Report
      2023 Research-status Report
  • [Presentation] 神経放射線科医と共有したいNeurofluidの吸収メカニズム-髄膜リンパ管meningeal lymphaticsを介する髄液排液路の再考-2022

    • Author(s)
      三浦真弘
    • Organizer
      Neurofluid Imaging Seminar 2022
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Neurofluids吸収機序の最新知見: 神経関連液性成分の生理的排液には脈管外通液路と髄膜リンパ管が鍵を握る2022

    • Author(s)
      三浦 真弘、内野哲哉、山田茂樹
    • Organizer
      第1回日本脳脊髄液漏出症学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 最新のNeurofluidの硬膜外排泄メカニズム-Neurofluid経リンパ管吸収路を中心として2022

    • Author(s)
      三浦真弘
    • Organizer
      Stroke2023 (SAH spasm symposium)
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 脳脊髄液の吸収機序-r臨床から基礎研究の的見地からの考察2022

    • Author(s)
      高橋浩一、三浦真弘
    • Organizer
      第14回水頭症脳脊髄液学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 脳脊髄液減少症から髄液の機能と動態を考える2022

    • Author(s)
      高橋浩一、三浦真弘
    • Organizer
      第2回日本脳脊髄液漏出症学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 区域麻酔に必要な局所解剖学- 解剖学的ピットフォールの検討-2022

    • Author(s)
      三浦真弘
    • Organizer
      日本区域麻酔学会第9回学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Dynamics and function of cerebrospinal fluid for differences between iNPH and intracranial hypotension2022

    • Author(s)
      高橋浩一、三浦真弘
    • Organizer
      第24回日本正常圧水頭症学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] Scanning electron microscopic analysis of the spinal meningeal-extravascular fluid pathway related to physiological cerebrospinal fluid absorption2022

    • Author(s)
      三浦 真弘, 三浦 真子, 山田 茂樹, 高橋 浩一
    • Organizer
      第24回日本正常圧水頭症学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] 腋窩・頸部リンパ節に生じた癌関連線維化の3次元構造解析-走査電子顕微鏡学的検討-2022

    • Author(s)
      三浦崇太郎、三浦真弘、田平陽子、渡部功一
    • Organizer
      第128回日本解剖学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] 脳脊髄液の酸性と吸収メカニズムの正常と異常から健康を考える2022

    • Author(s)
      三浦 真弘
    • Organizer
      令和4年度大分大学医学部公開講座
    • Related Report
      2022 Research-status Report
  • [Book] Moore's Clinically Anatomy (9th ed)2024

    • Author(s)
      三浦 真弘
    • Total Pages
      1124
    • Publisher
      メディカルインターナショナルメディカルサイエンス
    • ISBN
      9784815730956
    • Related Report
      2024 Annual Research Report
  • [Book] Moor's Clinically Oriented Anatomy (Chapter 7: Lower limb) (Ninth Edition)2024

    • Author(s)
      Miura M
    • Publisher
      MEDSi
    • ISBN
      9784815730956
    • Related Report
      2023 Research-status Report

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Published: 2022-04-19   Modified: 2026-01-16  

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