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Pathophysiology of demyelinating diseases and epilepsy using microglia removal model by TRECK system

Research Project

Project/Area Number 19K08311
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

SAKUMA Hiroshi  公益財団法人東京都医学総合研究所, 脳・神経科学研究分野, プロジェクトリーダー (50425683)

Project Period (FY) 2019-04-01 – 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 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsミクログリア / アストロサイト / ジフテリア毒素受容体 / TRECK法 / ジフテリア毒素 / 実験的自己免疫性脳脊髄炎 / けいれん重積 / 小児神経疾患 / 脱髄性疾患 / てんかん
Outline of Research at the Start

神経疾患におけるグリア細胞の重要性が認識され、ミクログリアを標的とした神経疾患の治療が現実味を帯びてきている。そこでミクログリアが疾患にもたらす影響を知るために、小児神経疾患マウスモデルの脳からミクログリアを除去して影響を調べるという研究を計画した。ジフテリア毒素受容体遺伝子を導入したノックインマウスを用いて、ミクログリアを一過性かつ選択的に死滅させることができる。このマウスに実験的自己免疫性脳脊髄炎やけいれん重積を誘導し、疾患の様々な病相でミクログリアを除去して影響を観察する。さらに病態修飾の分子機構を解析し、脱髄性疾患とてんかんの病態におけるミクログリアの役割を解明する。

Outline of Final Research Achievements

Using knock-in mice for tissue-specific expression of the diphtheria toxin receptor (DTR-KI), we attempted to selectively eliminate microglia or astrocytes by administration of diphtheria toxin (DT). Although microglia were selectively eliminated by DT in vitro, DT administration did not produce expected changes in tissue-specific DTR-KI mice (in which CX3CR1-CreERT2 or GFAP-Cre mice were crossed with DTR-KI mice) in vivo, suggesting that for some reason the genetic recombination was not occurring in glial cells. We also validated the experimental autoimmune encephalomyelitis and pilocarpine-induced status epilepticus models.

Academic Significance and Societal Importance of the Research Achievements

ジフテリア毒素受容体を用いるTRECK法ではDT投与後1-2日という極めて短時間で標的細胞を除去することができる。病相特異的なグリア細胞の役割を明らかにするためには目的の時期に合わせて迅速かつ確実に除去する必要があるので、速効性というTRECK法の長所は大きな強みとなる。また組織特異的Creマウスを用いることで様々な組織の研究に幅広く応用が可能であり、疾患動物モデルと組み合わせることで特定の細胞が疾患において果たす役割を包括的に解析することができる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2021 2020 2019

All Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 5 results)

  • [Journal Article] Oxygen-Glucose Deprivation Increases NR4A1 Expression and Promotes Its Extranuclear Translocation in Mouse Astrocytes2024

    • Author(s)
      Moriyama Kengo、Horino Asako、Kohyama Kuniko、Nishito Yasumasa、Morio Tomohiro、Sakuma Hiroshi
    • Journal Title

      Brain Sciences

      Volume: 14 Issue: 3 Pages: 244-244

    • DOI

      10.3390/brainsci14030244

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complement-dependent cytotoxicity of human autoantibodies against myelin oligodendrocyte glycoprotein2023

    • Author(s)
      Kohyama Kuniko、Nishida Hiroya、Kaneko Kimihiko、Misu Tatsuro、Nakashima Ichiro、Sakuma Hiroshi
    • Journal Title

      Frontiers in Neuroscience

      Volume: 17 Pages: 1014071-1014071

    • DOI

      10.3389/fnins.2023.1014071

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elevated cytokine, chemokine, and growth and differentiation factor-15 levels in hemorrhagic shock and encephalopathy syndrome: A retrospective observational study2021

    • Author(s)
      Yamaguchi Hiroshi、Nishiyama Masahiro、Tokumoto Shoichi、Ishida Yusuke、Tomioka Kazumi、Aoki Kazunori、Seino Yusuke、Toyoshima Daisaku、Takeda Hiroki、Kurosawa Hiroshi、Sakuma Hiroshi、Tada Hiroko、Nozu Kandai、Maruyama Azusa、Tanaka Ryojiro、Iijima Kazumoto、Nagase Hiroaki
    • Journal Title

      Cytokine

      Volume: 137 Pages: 155324-155324

    • DOI

      10.1016/j.cyto.2020.155324

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Intrathecal dexamethasone therapy for febrile infection‐related epilepsy syndrome2021

    • Author(s)
      Horino Asako、Kuki Ichiro、Inoue Takeshi、Nukui Megumi、Okazaki Shin、Kawawaki Hisashi、Togawa Masao、Amo Kiyoko、Ishikawa Junichi、Ujiro Atsushi、Shiomi Masashi、Sakuma Hiroshi
    • Journal Title

      Annals of Clinical and Translational Neurology

      Volume: 8 Issue: 3 Pages: 645-655

    • DOI

      10.1002/acn3.51308

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interleukin-1β in peripheral monocytes is associated with seizure frequency in pediatric drug-resistant epilepsy.2021

    • Author(s)
      Yamanaka G, Takamatsu T, Morichi S, Yamazaki T, Mizoguchi I, Ohno K, Watanabe Y, Ishida Y, Oana S, Suzuki S, Kashiwagi Y, Takata F, Sakuma H, Yoshimoto T, Kato M, Kawashima H
    • Journal Title

      J Neuroimmunol.

      Volume: 352 Pages: 577475-577475

    • DOI

      10.1016/j.jneuroim.2021.577475

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Early-life stress induces the development of Alzheimer's disease pathology via angiopathy2021

    • Author(s)
      Tanaka Tomoko、Hirai Shinobu、Hosokawa Masato、Saito Takashi、Sakuma Hiroshi、Saido Takaomi、Hasegawa Masato、Okado Haruo
    • Journal Title

      Experimental Neurology

      Volume: 337 Pages: 113552-113552

    • DOI

      10.1016/j.expneurol.2020.113552

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Improvement in recurrent anti-myelin oligodendrocyte glycoprotein antibody - positive cerebral cortical encephalitis not requiring anti - inflammatory therapy following the decrease in cytokine/chemokine levels2020

    • Author(s)
      Takamatsu Tomoko、Yamanaka Gaku、Uryu Hideko、Takeshita Mika、Morishita Natsumi、Morichi Shinichiro、Ishida Yu、Oana Shingo、Terashi Hiroo、Shichino Hiroyuki、Sakuma Hiroshi、Kawashima Hisashi
    • Journal Title

      Multiple Sclerosis and Related Disorders

      Volume: 43 Pages: 102168-102168

    • DOI

      10.1016/j.msard.2020.102168

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extracellular ADP augments microglial inflammasome and NF‐κB activation via the P2Y12 receptor2019

    • Author(s)
      Suzuki Tomonori、Kohyama Kuniko、Moriyama Kengo、Ozaki Mariko、Hasegawa Setsuko、Ueno Taro、Saitoe Minoru、Morio Tomohiro、Hayashi Masaharu、Sakuma Hiroshi
    • Journal Title

      European Journal of Immunology

      Volume: 50 Issue: 2 Pages: 205-219

    • DOI

      10.1002/eji.201848013

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2019-04-18   Modified: 2025-01-30  

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