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Treatment for Alzheimer Disease based on Abnormal Protein Excretion and Propagation

Research Project

Project/Area Number 21K07423
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionOsaka Metropolitan University (2022-2023)
Osaka City University (2021)

Principal Investigator

Itoh Yoshiaki  大阪公立大学, 大学院医学研究科, 教授 (90265786)

Co-Investigator(Kenkyū-buntansha) 木村 裕子  大阪公立大学, 大学院医学研究科, 後期臨床研究医 (20815394)
三野 俊和  大阪公立大学, 大学院医学研究科, 講師 (60597566)
武田 景敏  大阪公立大学, 大学院医学研究科, 講師 (90445015)
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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsアミロイドβ / 血管周囲腔 / glymphatic system / 拡散 / 対流 / dextran / アルツハイマー病 / 動物モデル / 脳アミロイド血管症 / 治療 / 認知症 / 多光子顕微鏡 / アストロサイト / glymphatic系
Outline of Research at the Start

我々はこれまで、遺伝性アルツハイマー病(Osaka変異)を臨床モデルとし、アミロイドβ(Aβ)の集積・重合、代謝・排泄の基礎研究を行ってきた。このOsaka変異ではAβは重合してoligomerを形成、神経障害を惹起するが、さらに重合して神経原線維変化をきたすことはないこと報告した。一方、Aβの脳内播種spreadingについては病巣拡大の機序として重要視されているが、我々はここ数年glymphatic系の画像化に取り組んでいるうちに、Aβがアストロサイトのシンシチウムを介して脳内を伝播することを発見した。本研究では「Aβの脳内伝播機序を明らかにする」。

Outline of Final Research Achievements

Perivascular space, also known as Glymphatic system, is regarded as a cadidate mechanism involved in the transportation of large molecules including amyloid-β (Aβ), one of pathogens for Alzheimer disease. We observed dextran movement from the surface of the mouse cerebral cortex to the deep parenchyma through perivascula space with multi-photon microscopy under a closed cranial window. The transportation velocity was dependent on the size of dextran with no significant movement found in the largest dextran, suggesting that diffusion is the main mechanism involved. No convective flow was observed. Similarly Aβ is observed to travel through the perivascular space. Polymerization of Aβ reduced the transport speed, confirming the diffusion as the movement mechanism.
The present study revealed that the perivascular system is involved in the clearance of Aβ as well as amyloid angiopathy, a key pathology for anti Aβ antibody treatment.

Academic Significance and Societal Importance of the Research Achievements

アルツハイマー病の原因であるアミロイドβ(Aβ)の脳からの排出に、脳血管周囲腔におけるAβ拡散が重要であることが動物実験にて示された。排出機序として血管周囲腔の髄液対流(convection)を主たる機序とする過去の論文に対し、本研究ではデキストランを用いて拡散の存在を確認した一方、対流は観察されなかった。またAβが重合すると排出が低下し血管壁に付着しやすいことを観察、アミロイド血管症の原因や、抗Aβ療法の際の副作用である血管炎症(ARIA)の原因となることを示した。

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

All Journal Article (8 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Book (2 results)

  • [Journal Article] Diffusion Mediates Molecular Transport through the Perivascular Space in the Brain2024

    • Author(s)
      Tanaka Marie、Hirayoshi Yoko、Minatani Shinobu、Hasegawa Itsuki、Itoh Yoshiaki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 25 Issue: 5 Pages: 2480-2480

    • DOI

      10.3390/ijms25052480

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Correlation between Phase-difference-enhanced MR Imaging and Amyloid Positron Emission Tomography: A Study on Alzheimer’s Disease Patients and Normal Controls2023

    • Author(s)
      Takita Hirotaka、Doishita Satoshi、Yoneda Tetsuya、Tatekawa Hiroyuki、Abe Takato、Itoh Yoshiaki、Horiuchi Daisuke、Tsukamoto Taro、Shimono Taro、Miki Yukio
    • Journal Title

      Magnetic Resonance in Medical Sciences

      Volume: 22 Issue: 1 Pages: 67-78

    • DOI

      10.2463/mrms.mp.2021-0123

    • NAID

      130008144794

    • ISSN
      1347-3182, 1880-2206
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multiple Cerebral Infarctions Accompanied by Subcortical and Subarachnoid Hemorrhaging in Bilateral Border Zone Areas in a Patient with Eosinophilic Granulomatosis with Polyangiitis2022

    • Author(s)
      Mino Toshikazu、Sakaguchi Hiroka、Hasegawa Itsuki、Takeda Akitoshi、Yoshizaki Takahito、Abe Takato、Itoh Yoshiaki
    • Journal Title

      Internal Medicine

      Volume: 61 Issue: 6 Pages: 891-895

    • DOI

      10.2169/internalmedicine.7999-21

    • NAID

      130008084405

    • ISSN
      0918-2918, 1349-7235
    • Year and Date
      2022-03-15
    • Related Report
      2021 Research-status Report
  • [Journal Article] In Vivo Dynamic Movement of Polymerized Amyloid β in the Perivascular Space of the Cerebral Cortex in Mice2022

    • Author(s)
      Hasegawa Itsuki、Hirayoshi Yoko、Minatani Shinobu、Mino Toshikazu、Takeda Akitoshi、Itoh Yoshiaki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 12 Pages: 6422-6422

    • DOI

      10.3390/ijms23126422

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Impact of depression on mental fatigue and attention in patients with multiple sclerosis2021

    • Author(s)
      Takeda Akitoshi、Minatani Shinobu、Ishii Akira、Matsuo Takashi、Tanaka Masaaki、Yoshikawa Takahiro、Itoh Yoshiaki
    • Journal Title

      Journal of Affective Disorders Reports

      Volume: 5 Pages: 100143-100143

    • DOI

      10.1016/j.jadr.2021.100143

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Japanese Multicenter Study on PET and Other Biomarkers for Subjects with Potential Preclinical and Prodromal Alzheimer's Disease.2021

    • Author(s)
      Senda M, Ishii K, Ito K, Ikeuchi T, Matsuda H, Iwatsubo T, Iwata A, Ihara R, Suzuki K, Kasuga K, Ikari Y, Niimi Y, Arai H, Tamaoka A, Arahata Y, Itoh Y, Tachibana H, Ichimiya Y, Washizuka S, Odawara T, Ishii K, Ono K, Yokota T, Nakanishi A, Matsubara E, Mori H, Shimada H.
    • Journal Title

      J Prev Alzheimers Dis

      Volume: 8 Issue: 4 Pages: 495-502

    • DOI

      10.14283/jpad.2021.37

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Progression of cortical dysfunction in CSF1R-related leukoencephalopathy detected using single-photon emission computed tomography2021

    • Author(s)
      Sakaguchi Hiroka、Hasegawa Itsuki、Minatani Shinobu、Miyazawa Naotaka、Okamoto Kosuke、Mino Toshikazu、Takeda Akitoshi、Hatsuta Hiroyuki、Yoshizaki Takahito、Abe Takato、Kondo Yasufumi、Yoshida Kunihiro、Itoh Yoshiaki
    • Journal Title

      Neurology and Clinical Neuroscience

      Volume: 9 Issue: 5 Pages: 369-375

    • DOI

      10.1111/ncn3.12525

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020115

    • Related Report
      2021 Research-status Report
  • [Journal Article] Case of cortical superficial siderosis presenting with corticobasal syndrome2021

    • Author(s)
      Miyazawa Naotaka、Hasegawa Itsuki、Mino Toshikazu、Takeda Akitoshi、Hatsuta Hiroyuki、Yoshizaki Takahito、Takao Masaki、Itoh Yoshiaki
    • Journal Title

      Neurology and Clinical Neuroscience

      Volume: 10 Issue: 2 Pages: 95-97

    • DOI

      10.1111/ncn3.12572

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020116

    • Related Report
      2021 Research-status Report
  • [Presentation] Microcirculatory Disturbance in Dementia2023

    • Author(s)
      Yoshiaki Itoh
    • Organizer
      The 12th World Congress for Microcirculation
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Perivascular Flow Dynamics studied with Two Photon Microscopy.2022

    • Author(s)
      Marie TANAKA, Itsuki HASEGAWA, Yoko HIRAYOSHI, Shinobu MINATANI, Akitoshi TAKEDA, Yoshiaki ITOH
    • Organizer
      BRAIN&BRAIN PET2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Perivascular Flow Dynamics revealed with Two Photon Microscopy2022

    • Author(s)
      田中眞梨江, 長谷川樹, 平良庸子, 皆谷忍, 武田景敏, 伊藤義彰.
    • Organizer
      第47回日本微小循環学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] アルツハイマー病患者と健常者における11C-PiBと18F-PiB-PETイメージングの比較2022

    • Author(s)
      外川啓介, 皆谷忍, 田中眞梨江, 難波広人, 長谷川樹, 三野俊和, 武田景敏,東山滋明, 川邉譲治, 伊藤義彰.
    • Organizer
      第65回日本脳循環代謝学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] 非典型アルツハイマー病の診断における脳血流SPECT検査の有用性2022

    • Author(s)
      難波広人, 武田景敏, 皆谷忍, 東山滋明, 河邊譲治, 伊藤義彰.
    • Organizer
      第41回日本認知症学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] 剖検にてTDP-43蓄積を認めた大脳皮質基底核症候群の1例2022

    • Author(s)
      留永嵩文, 難波広人, 武田景敏, 長谷川樹, 三野俊和, 松原知康, 初田裕幸, 東山滋明, 河邉譲治, 伊藤義彰.
    • Organizer
      日本神経学会第123回近畿地方会
    • Related Report
      2022 Research-status Report
  • [Presentation] Glymphatic system を介したアミロイド重合体oligomer/fibrilの輸送についての検討2021

    • Author(s)
      長谷川樹, 田中眞梨江, 平良庸子, 皆谷忍, 武田景敏, 伊藤義彰
    • Organizer
      第64回日本脳循環代謝学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] MOG抗体関連疾患の臨床像2021

    • Author(s)
      宮澤直高, 武田景敏, 坂口裕香, 岡本光佑, 田上瑞記, 本田茂, 伊藤義彰
    • Organizer
      第118回日本内科学会講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] ロゴペニック型進行性失語症の髄液バイオマーカーとPET所見の関連2021

    • Author(s)
      武田景敏, 水田秀子, 皆谷忍, 東山滋明, 川邉譲治, 伊藤義彰
    • Organizer
      第62回日本神経学会学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] FHL1遺伝子変異を伴う筋原線維性ミオパチーにより四肢筋力低下の自覚なく呼吸不全を来した1例2021

    • Author(s)
      青原健太, 木村裕子, 武田景敏, 井上直人, 市川佳誉, 泉谷康宏, 西野一三, 伊藤義彰.
    • Organizer
      日本神経学会第119回近畿地方会
    • Related Report
      2021 Research-status Report
  • [Presentation] 失語症状で発症したレビー小体型認知症の一例2021

    • Author(s)
      武田景敏, 難波広人, 皆谷忍, 水田秀子, 東山滋明, 川邉譲治, 伊藤義彰
    • Organizer
      第40回日本認知症学会学術集会
    • Related Report
      2021 Research-status Report
  • [Book] 最新主要文献とガイドラインでみる 脳神経内科学レビュー 2022-’232022

    • Author(s)
      鈴木則宏
    • Total Pages
      456
    • Publisher
      総合医学社
    • ISBN
      9784883784646
    • Related Report
      2021 Research-status Report
  • [Book] 脳卒中治療ガイドライン20212021

    • Author(s)
      日本脳卒中学会脳卒中ガイドライン委員会
    • Total Pages
      299
    • Publisher
      協和企画
    • Related Report
      2021 Research-status Report

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

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