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2015 Fiscal Year Annual Research Report

細胞外タウ除去機構の破綻に基づくアルツハイマー病の病態解明と新規抗糖化療法の開発

Research Project

Project/Area Number 15H04271
Research InstitutionNational Cardiovascular Center Research Institute

Principal Investigator

猪原 匡史  国立研究開発法人国立循環器病研究センター, 病院, 医長 (00372590)

Co-Investigator(Kenkyū-buntansha) 周 びん  公益財団法人先端医療振興財団, その他部局等, その他 (00598774)
飯田 秀博  国立研究開発法人国立循環器病研究センター, 研究所, 部長 (30322720)
植田 初江  国立研究開発法人国立循環器病研究センター, 病院, 部長 (40522983)
Project Period (FY) 2015-04-01 – 2018-03-31
Keywords脳アミロイド血管症 / シロスタゾール / 抗糖化薬 / アミロイドβ / タウ
Outline of Annual Research Achievements

認知症の治療法開発において、これまでアミロイド仮説に則った治療法、すなわち、アミロイドβ(Aβ)の産生抑制やTauのリン酸化抑制を企図した治療法開発の試みはすべて失敗している。単剤での認知症抜本治療薬の開発が理想であるが、高齢認知症患者はAβやTauの異常のみならず、加齢や脳血管障害などの複合的な要因を伴っているため、単剤での治療は困難である可能性がある。従って抗がん剤や降圧薬と同様、多剤での認知症治療が現実的な目標である。米国ではゲノム情報に加え、ライフスタイル・環境要因の観点から患者をサブグループし、適切な医療を実現するPrecision Medicineが進められつつある。治療介入可能な新規危険因子の同定は、認知症治療に直結する確実性の高い研究戦略であると捉えられている。
そこで、神経変性と血管変性の両者の性質を備える脳アミロイド血管症(CAA)が認知症発症にどのような影響を与えるか、という課題についてモデル動物を用いて解析した。Tau過剰発現マウスと血管指向性Aβ過剰発現マウス(CAAモデル)を交配した結果、CAAは脳梗塞や脳出血の原因となるのみならず、Tau病理、神経細胞脱落を促進し、認知機能障害を増悪させることを明らかにした。また、CAAモデル動物に対するシロスタゾール投与はAβクリアランスを改善することを先行研究で明らかにしているが、新たに今回の実験で用いた抗糖化剤drug XがAβ凝集を抑制し、CAAを改善させ、空間認知能力を改善させることを明らかにした (特許申請中)。脳血流や脳血管予備能に対する効果はシロスタゾールとdrug Xで相補的であったことから、作用点の異なる2種類の薬剤による多剤併用療法の可能性が示唆された。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

抗糖化薬drug Xが認知症モデル動物(Aβ過剰発現マウス)の認知機能を改善することが明らかとなったため。

Strategy for Future Research Activity

抗糖化薬Drug Xの認知症疾患への臨床応用を目指し、動物モデルを用いたメカニズム解明を進めていく。

  • Research Products

    (24 results)

All 2016 2015 Other

All Int'l Joint Research (3 results) Journal Article (13 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 13 results,  Open Access: 2 results,  Acknowledgement Compliant: 3 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 4 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] Newcastle University/Edinburgh University/Southampton University(United Kingdom)

    • Country Name
      United Kingdom
    • Counterpart Institution
      Newcastle University/Edinburgh University/Southampton University
  • [Int'l Joint Research] Institute of Primate Research(Kenya)

    • Country Name
      Kenya
    • Counterpart Institution
      Institute of Primate Research
  • [Int'l Joint Research] Louisville University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Louisville University
  • [Journal Article] Frontal White Matter Hyperintensities, Clasmatodendrosis and Gliovascular Abnormalities in Ageing and Post-stroke Dementia2016

    • Author(s)
      13.Chen A, Akinyemi RO, Hase Y, Firbank MJ, Ndung’u MN, Foster V, Craggs LJL, Washida K, Okamoto Y, Thomas AJ, Polvikosk TM, Allan JM, Oakley AE, O’Brien JT, Horsburgh K, Ihara M, Kalaria RN
    • Journal Title

      Brain

      Volume: 139 Pages: 242-258

    • DOI

      http://dx.doi.org/10.1093/brain/awv328

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gradual cerebral hypoperfusion in spontaneously hypertensive rats induces slowly evolving white matter abnormalities and impairs working memory2016

    • Author(s)
      Kitamura A, Saito S, Maki A, Ayaki T, Oishi N, Kalaria RN, Hattori Y, Yamamoto Y, Urushitani M, Horsburgh K, Fukuyama H, Takahashi R, Ihara M
    • Journal Title

      J Cereb Blood Flow Metab

      Volume: - Pages: 印刷中

    • DOI

      10.1177/0271678X15606717

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hemisphere asymmetry of response to treatment in an Alzheimer’s disease mouse model2016

    • Author(s)
      Manousopoulou A, Saito S, Yamamoto Y, Al-Daghri NM, Ihara M, Carare RO, Garbis SD
    • Journal Title

      J Alzheimers Dis

      Volume: 21 Pages: 333-338

    • DOI

      10.3233/JAD-151078

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Interaction between cerebrovascular disease and Alzheimer pathology2016

    • Author(s)
      Saito S, Ihara M
    • Journal Title

      Curr Opin Psychiatry

      Volume: 29 Pages: 168-173

    • DOI

      10.1097/YCO.0000000000000239

    • Peer Reviewed
  • [Journal Article] Stroke Injury, cognitive Impairment and vascular dementia2016

    • Author(s)
      Kalaria RN, Akinyemi R, Ihara M
    • Journal Title

      Biochim Biophys Acta

      Volume: - Pages: 印刷中

    • DOI

      10.1016/j.bbadis.2016.01.015

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Gradual Carotid Artery Stenosis in Mice Closely Replicates Hypoperfusive Vascular Dementia in Humans2016

    • Author(s)
      6.Hattori Y, Enmi J, Iguchi S, Saito S, Yamamoto Y, Tsuji M, Nagatsuka K, Kalaria RN, Iida H, Ihara M
    • Journal Title

      J Am Heart Assoc

      Volume: 5 Pages: e002757

    • DOI

      10.1161/JAHA.115.002757

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Emerging evidence for pathogenesis of sporadic cerebral small vessel disease2016

    • Author(s)
      Ihara M, Yamamoto Y
    • Journal Title

      Stroke

      Volume: 47 Pages: 554-560

    • DOI

      10.1161/STROKEAHA.115.009627

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Influence of low-dose aspirin on cerebral amyloid angiopathy in mice2016

    • Author(s)
      Hattori Y, Maki T, Saito S, Yamamoto Y, Nagatsuka K, Ihara M
    • Journal Title

      J Alzheimers Dis

      Volume: - Pages: 印刷中

    • DOI

      10.3233/JAD-160013

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Immunolocalisation of PDGFRβ and pericytes in CADASIL2015

    • Author(s)
      Craggs LJL, Fenwick R, Oakley AE, Ihara M, Kalaria RN
    • Journal Title

      Neuropath Appl Neurobiol

      Volume: 41 Pages: 557-570

    • DOI

      10.1111/nan.12188

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mild cognitive impairment: at the crossroad of neurodegeneration and vascular dysfunction2015

    • Author(s)
      Saito S, Yamamoto Y, Ihara M
    • Journal Title

      Curr Alzheimer Res

      Volume: 12 Pages: 507-512

    • DOI

      10.2174/1567205012666150530202508

    • Peer Reviewed
  • [Journal Article] Translation of pre-clinical studies into successful clinical trials for Alzheimer’s disease: what are the roadblocks and how can they be overcome?2015

    • Author(s)
      Banik A, Brown RE, Bamburg J, Lahiri DK, Khurana D, Friedland RP, Chen W, Ding Y, Mudher A, Padjen AL, Mukaetova-Ladinska E, Ihara M, Srivastava E, Srivastava MVP, Masters CL, Kalaria RN, Anand A
    • Journal Title

      J Alzheimer Dis

      Volume: 47 Pages: 815-843

    • DOI

      10.3233/JAD-150136

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Structure-Activity Relationship Study of Heterocyclic Phenylethenyl and Pyridinylethenyl Derivatives as Tau-Imaging Agents That Selectively Detect Neurofibrillary Tangles in Alzheimer's Disease Brains2015

    • Author(s)
      16.Matsumura K, Ono M, Kitada A, Watanabe H, Yoshimura M, Iikuni S, Kimura H, Okamoto Y, Ihara M, Saji H
    • Journal Title

      J Med Chem

      Volume: 58 Pages: 7241-7257

    • DOI

      10.1021/acs.jmedchem.5b00440

    • Peer Reviewed
  • [Journal Article] microRNA-33 Regulates ApoE Lipidation and Amyloid-β Metabolism in the Brain2015

    • Author(s)
      14.Kim J, Yoon H, Horie T, Burchett J, Restivo J, Rotllan N, Ramírez C, Verghese P, Ihara M, Hoe HS, Esau C, Fernández-Hernando C, Holtzman D, Cirrito J, Ono K, Kim J
    • Journal Title

      J Neurosci

      Volume: 35 Pages: 14717-14726

    • DOI

      10.1523/JNEUROSCI.2053-15.2015

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ドラッグ・リポジショニングの手法を用いた軽度認知障害に対する創薬戦略2015

    • Author(s)
      猪原匡史
    • Organizer
      第38回分子生物学会年会・第88回生化学会大会合同大会
    • Place of Presentation
      神戸
    • Year and Date
      2015-12-01 – 2015-12-01
    • Invited
  • [Presentation] 血管病を標的とした認知症治療2015

    • Author(s)
      猪原匡史
    • Organizer
      第5回認知症予防学会
    • Place of Presentation
      神戸
    • Year and Date
      2015-09-27 – 2015-09-27
    • Invited
  • [Presentation] Animal Model of VCI2015

    • Author(s)
      Masafumi Ihara
    • Organizer
      Vas-Cog International
    • Place of Presentation
      Tokyo
    • Year and Date
      2015-09-16 – 2015-09-16
    • Int'l Joint Research / Invited
  • [Presentation] Vascular Cognitive Impairment2015

    • Author(s)
      猪原匡史
    • Organizer
      第20回認知神経科学会
    • Place of Presentation
      東京
    • Year and Date
      2015-08-09 – 2015-08-09
    • Invited
  • [Presentation] Bone morphogenetic protein‐4 expression by pericytes correlates with white matter damage in dementing disorders2015

    • Author(s)
      Masafumi Ihara
    • Organizer
      Annual Meeting of the Japan Neuroscience Society
    • Place of Presentation
      Kobe
    • Year and Date
      2015-07-28 – 2015-07-28
  • [Presentation] Experimental evidence linking vascular factors to Alzheimer's disease2015

    • Author(s)
      Masafumi Ihara
    • Organizer
      Alzheimer's Association International Conference (AAIC)
    • Place of Presentation
      Washington DC, USA
    • Year and Date
      2015-07-18 – 2015-07-18
    • Int'l Joint Research
  • [Remarks] 脳血管研究グループについて

    • URL

      http://www.ncvc.go.jp/hospital/pro/info/neurovascular/

  • [Patent(Industrial Property Rights)] 放射性ハロゲン標識ピリド[1,2-a]ベンゾイミダゾール誘導体化合物2015

    • Inventor(s)
      小野 正博、佐治 英郎、猪原匡史、松本博樹、関育也
    • Industrial Property Rights Holder
      小野 正博、佐治 英郎、猪原匡史、松本博樹、関育也
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      特願2015-161472
    • Filing Date
      2015-08-19

URL: 

Published: 2017-01-06   Modified: 2022-09-26  

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