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Involvement of microglial lipid signaling in the pathomechanism of Alzheimer disease

Research Project

Project/Area Number 17K15446
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Biological pharmacy
Research InstitutionThe University of Tokyo

Principal Investigator

Takatori Sho  東京大学, 大学院薬学系研究科(薬学部), 助教 (80624361)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsアルツハイマー病 / ミクログリア / ホスホイノシチド / 脂質 / 電子顕微鏡
Outline of Final Research Achievements

In the pathomechanism of Alzheimer disease (AD), microglia cluster around amyloid β (Aβ) plaques and mitigate the neurotoxicity of Aβ. TREM2, an AD risk gene that encodes a microglial receptor, is crucially important in this process, although its downstream signals remain unknown. Here we investigated the involvement of INPP5D, another AD risk gene that encodes a lipid phosphatase and is specifically expressed in microglia in the brain. We found that heterodeficiency of Inpp5d partially reverted impaired microglial clustering in TREM2 loss-of-function mice, suggesting that INPP5D has an inhibitory role in the TREM2 signaling pathway.

Academic Significance and Societal Importance of the Research Achievements

アルツハイマー病病態におけるミクログリアの役割については不明の点が多く、特にミクログリアがAβ斑に集簇し神経保護作用を発揮するメカニズムに関しては分子レベルの知見が不足していた。本研究では、この過程に必須の受容体であるTREM2の下流にINPP5Dが関与する可能性を提示したという点で意義が大きい。また本研究では、ミクログリアによる神経保護作用の発現においてINPP5Dに依存しない経路が重要である可能性を提唱した。この事実は、これまで同一視されてきた、Aβ斑への集簇と神経保護作用の2つの事象がそれぞれ異なる分子経路により制御されている可能性を示唆するものであり新規性が高い。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (14 results)

All 2019 2018 2017 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 1 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Journal Article] Genetic Risk Factors for Alzheimer Disease: Emerging Roles of Microglia in Disease Pathomechanisms2019

    • Author(s)
      Takatori Sho、Wang Wenbo、Iguchi Akihiro、Tomita Taisuke
    • Journal Title

      Adv Exp Med Biol

      Volume: 1118 Pages: 83-116

    • DOI

      10.1007/978-3-030-05542-4_5

    • ISBN
      9783030055417, 9783030055424
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Definition of phosphoinositide distribution in the nanoscale2019

    • Author(s)
      Tsuji Takuma、Takatori Sho、Fujimoto Toyoshi
    • Journal Title

      Current Opinion in Cell Biology

      Volume: 57 Pages: 33-39

    • DOI

      10.1016/j.ceb.2018.10.008

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] AP180 N-Terminal Homology (ANTH) and Epsin N-Terminal Homology (ENTH) Domains: Physiological Functions and Involvement in Disease2018

    • Author(s)
      Takatori Sho、Tomita Taisuke
    • Journal Title

      Adv Exp Med Biol

      Volume: in press Pages: 1-22

    • DOI

      10.1007/5584_2018_218

    • ISBN
      9783030143381, 9783030143398
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Loss of kallikrein-related peptidase 7 exacerbates amyloid pathology in Alzheimer’s disease model mice2018

    • Author(s)
      Kidana K, Tatebe T, Ito K, Hara N, Kakita A, Saito T, Takatori S, Ouchi Y, Ikeuchi T, Makino M, Saido TC, Akishita M, Iwatsubo T, Hori Y, Tomita T
    • Journal Title

      EMBO Molecular Medicine

      Volume: 10 Issue: 3

    • DOI

      10.15252/emmm.201708184

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Niemann-Pick type C proteins promote microautophagy by expanding raft-like membrane domains in the yeast vacuole2017

    • Author(s)
      Tsuji T, Fujimoto M, Tatematsu T, Cheng J, Orii M, Takatori S, Fujimoto T
    • Journal Title

      eLife

      Volume: 6

    • DOI

      10.7554/elife.25960

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A New Electron Microscopic Method to Observe the Distribution of Phosphatidylinositol 3,4-bisphosphate2017

    • Author(s)
      Aktar S, Takatori S, Tsuji T, Orii M, Ohsaki Y, Cheng J, Fujimoto T
    • Journal Title

      ACTA HISTOCHEMICA ET CYTOCHEMICA

      Volume: 50 Issue: 5 Pages: 141-147

    • DOI

      10.1267/ahc.17025

    • NAID

      130006179489

    • ISSN
      0044-5991, 1347-5800
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] アルツハイマー病リスク遺伝子RIN3のミクログリアにおける病的機能の解明2018

    • Author(s)
      藤田隆弘, 王文博, 高鳥翔, 富田泰輔
    • Organizer
      第40回神経組織培養研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] アルツハイマー病リスク遺伝子INPP5Dの病理学的役割の解明2018

    • Author(s)
      井口明優, 高鳥翔, 木村新伍, 佐々木純子, 斉藤貴志, 西道隆臣, 高井俊行, 佐々木雄彦, 富田泰輔
    • Organizer
      第40回神経組織培養研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 層板小体の恒常性維持におけるLRRK2の役割2018

    • Author(s)
      荒木美保, 高鳥翔, 伊藤弦太, 富田泰輔
    • Organizer
      第41回日本分子生物学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] バルプロ酸母体投与自閉症モデルマウスにおいて興奮性シナプス形成異常をもたらす分子メカニズムの解明2018

    • Author(s)
      吉田文明, 長友亮太, 木村美咲, 伊藤弦太, 高鳥翔, 富田泰輔
    • Organizer
      第41回日本分子生物学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Analysis of the effects of INPP5D/SHIP1 deficiency on amyloid pathology in Alzheimer model mice2017

    • Author(s)
      Takatori S
    • Organizer
      EMBO/EMBL Symposium: Mechanisms of Neurodegeneration
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 東京大学大学院薬学系研究科機能病態学教室

    • URL

      http://www.f.u-tokyo.ac.jp/~neuropsc/tomita/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 東京大学大学院薬学系研究科機能病態学教室

    • URL

      http://www.f.u-tokyo.ac.jp/~neuropsc/tomita/index.html

    • Related Report
      2017 Research-status Report
  • [Patent(Industrial Property Rights)] 自閉症発症機構に関連する接着分子2019

    • Inventor(s)
      富田泰輔、伊藤弦太、高鳥翔、長友亮太、吉田文明
    • Industrial Property Rights Holder
      富田泰輔、伊藤弦太、高鳥翔、長友亮太、吉田文明
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2018 Annual Research Report
    • Overseas

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Published: 2017-04-28   Modified: 2020-03-30  

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