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The diagnostic usefulness of 11C-ITMM, a newly developed mGluR1 ligand, in patients with spinocerebellar ataxia

Research Project

Project/Area Number 15K19503
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Neurology
Research InstitutionTokyo Metropolitan Geriatric Hospital and Institute of Gerontology

Principal Investigator

Ishibashi Kenji  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究員 (50469962)

Research Collaborator Ishii Kenji  
Miura Yoshiharu  
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords代謝型グルタミン酸受容体1型 / PET / 脊髄小脳変性症 / 脊髄小脳変性
Outline of Final Research Achievements

Imaging of type 1 metabotropic glutamate receptor (mGluR1) in living human brains has become possible using ITMM-PET. Because mGluR1 is expressed in Purkinje cells, ITMM-PET can estimate cerebellar function by targeting Purkinje cells.
ITMM-PET studies in patients with spinocerebellar ataxia suggest that mGluR1 expression in the cerebellum can correlate with the degree of ataxia, that ITMM-PET can detect abnormality in the cerebellum with higher sensitivity than MRI, that ITMM-PET can be more useful for estimating cerebellar function than FDG-PET, and that ITMM-PET may be a candidate biomarker for estimating future disease severity and also for the preclinical or early diagnosis of hereditary spinocerebellar ataxia.

Academic Significance and Societal Importance of the Research Achievements

ITMM-PETは、代謝型グルタミン酸受容体1型を介して小脳機能を測定する。脊髄小脳変性症患者を対象とした研究により、ITMM-PETは、既存の検査と比べて優れた検査であることが示された。
一般臨床において、小脳疾患が疑われても、従来の検査では小脳に異常を指摘できないことがある。このような場合に、ITMM-PETが小脳機能を測定することにより、小脳疾患の診断に有用となる可能性がある。また、ITMM-PETはプルキンエ細胞イメージングに相当する。プルキンエ細胞の脱落が病態の中心である遺伝性脊髄小脳変性症等の小脳疾患では、ITMM-PETが病期の判定に有用となる可能性がある。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (10 results)

All 2019 2018 2017 2016 2015

All Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Unchanged type 1 metabotropic glutamate receptor availability in patients with Alzheimer's disease: A study using 11C-ITMM positron emission tomography2019

    • Author(s)
      Ishibashi Kenji、Miura Yoshiharu、Toyohara Jun、Ishiwata Kiichi、Ishii Kenji
    • Journal Title

      NeuroImage: Clinical

      Volume: 22 Pages: 101783-101783

    • DOI

      10.1016/j.nicl.2019.101783

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparison of imaging using 11C-ITMM and 18F-FDG for the detection of cerebellar ataxia.2017

    • Author(s)
      Ishibashi K, Miura Y, Toyohara J, Ishii K, Ishiwata K.
    • Journal Title

      J. Neurol. Sci.

      Volume: 375 Pages: 97-102

    • DOI

      10.1016/j.jns.2017.01.036

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Relationship between type 1 metabotropic glutamate receptors and cerebellar ataxia.2016

    • Author(s)
      Ishibashi K, Miura Y, Ishikawa K, Zhang MR, Toyohara J, Ishiwata K, Ishii K.
    • Journal Title

      J Neurol.

      Volume: 263 Issue: 11 Pages: 2179-2187

    • DOI

      10.1007/s00415-016-8248-3

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Decreased metabotropic glutamate receptor type 1 availability in a patient with spinocerebellar ataxia type 6: A 11C-ITMM PET study2015

    • Author(s)
      Kenji Ishibashia, Yoshiharu Miura, Kinya Ishikawa, Kenji Ishii, Kiichi Ishiwata
    • Journal Title

      Journal of the Neurological Sciences

      Volume: 355 Issue: 1-2 Pages: 202-205

    • DOI

      10.1016/j.jns.2015.05.041

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] SCA6における代謝型グルタミン酸受容体1型の経時的変化2018

    • Author(s)
      石橋賢士、三浦義治、我妻慧、豊原潤、石井賢二
    • Organizer
      第58回日本核医学回学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Type 1 metabotropic glutamate receptors measured with a novel PET ligand, 11C-ITMM, in patients with cerebellar ataxia2018

    • Author(s)
      Ishibashi K, Tago T, Wagatsuma K, Sakata M, Toyohara J, Ishii K
    • Organizer
      Society of Nuclear Medicine and Molecular Imaging Annual Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Short-term follow-up of type 1 metabotropic glutamate receptor availability in patients with spinocerebellar ataxia type 62018

    • Author(s)
      Ishibashi K, Miura Y, Wagatsuma K, Toyohara J, Ishii K
    • Organizer
      Society for Neuroscience Annual Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] PET imaging of type 1 metabotropic glutamate receptors in a family with spinocerebellar ataxia type 62017

    • Author(s)
      Kenji Ishibashi, Yoshiharu Miura, Kei Wagatsuma, Jun Toyohara, Kenji Ishi
    • Organizer
      The 23th World Congress of Neurology 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Type 1 metabotropic glutamate receptor availability in hereditary ataxia2017

    • Author(s)
      Kenji Ishibashi, Yoshiharu Miura, Kei Wagatsuma, Jun Toyohara, Kenji Ishii
    • Organizer
      The 12th Asia Oceania Congress of Nuclear Medicine and Biology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Type 1 metabotropic glutamate receptors in patients with sporadic spinocerebellar ataxia2016

    • Author(s)
      Kenji Ishibashi, Yoshiharu Miura, Kinya Ishikawa, Ming-Rong Zhang, Jun Toyohara, Kiichi Ishiwata, Kenji Ishii
    • Organizer
      第56回日本核医学会学術総会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-11-03
    • Related Report
      2016 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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