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A multimodal imaging study on gadolinium deposition in the brain caused by the contrast agent for MR imaging

Research Project

Project/Area Number 19K12872
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90140:Medical technology assessment-related
Research InstitutionNational Center for Geriatrics and Gerontology (2020-2021)
Fujita Health University (2019)

Principal Investigator

Yamada Masayuki  国立研究開発法人国立長寿医療研究センター, 認知症先進医療開発センター, 研究員 (40383773)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsMRI / 直鎖型GBCA / Gd脳組織沈着 / EPMA / AQP4 / Gd / GBCA / rat / brain / ガドリニウム造影剤 / ガドリニウム沈着 / Glymphatic system
Outline of Research at the Start

本研究は、生体ラット脳を対象に反復投与された直鎖型Gdキレート造影剤が、どのように脳内に移行し、脳内でどのように特定脳領域に集積するのか、またどのような化合状態で脳組織に沈着するのかについて、MRIや電子線マイクロアナライザーなど種々の画像解析法を組み合わせて解明に挑むマルチモーダル画像解析研究である。
MRIでは、生体ラット脳におけるGd造影剤の挙動や経時的に脳組織に蓄積するGdを高感度に検出して可視化し、電子線マイクロアナライザでは凍結薄切したラット脳組織について、Gdの特異的同定とその微視画像解析を実現して、上記課題の解明に挑む。

Outline of Final Research Achievements

Recent reported studies showed that gadolinium (Gd) deposition in rodent brain caused after successive administration of a gadolinium (Gd)-chelated contrast agent over few weeks. Our study both used temporal magnetic resonance imaging (MRl) and an electron probe micro analyzer (EPMA) to identify the deposited Gd in the regional brain of rats received the administration.
The microstructure image analysis of the brain tissues by EPMA revealed more detail information of localization among Gd, Ca, and P in the brain tissue structure than MRI. In addition, the results of this study clarified the mechanism of GBCA migration in the brain in relation to the functionality of aquaporin 4 water channels.

Academic Significance and Societal Importance of the Research Achievements

本研究では実験動物(ラット)を対象に他の画像診断検査用造影剤と比べて安全とされてきたGdキレート造影剤の頻回投与がもたらす脳組織でのGd残存沈着を再現し、その詳細を解析した。Gd造影剤がどのような生理学的機序により脳内に移行し、どのような状態で脳組織に残存蓄積しているのか等、本研究を開始する時点で十分に明らかにされていなかった学術的課題の解明に向け、重要な手がかりを得ることができた。
本研究により得られたGdの脳内残存蓄積に関わる基礎的な知見は、今後の安全なGd造影剤の開発や医療での利用における安全性の向上に寄与すると考える。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (5 results)

All 2021 2020 2019

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

  • [Journal Article] Contrast-enhanced magnetic resonance imaging evidence for the role of astrocytic aquaporin-4 water channels in glymphatic influx and interstitial solute transport2020

    • Author(s)
      Takano Kazuki、Yamada Masayuki
    • Journal Title

      Magnetic Resonance Imaging

      Volume: 71 Pages: 11-16

    • DOI

      10.1016/j.mri.2020.05.001

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Development of a Positioner for Taking an MRI of an Experimental Mouse’s Lumbar Spine2021

    • Author(s)
      hirohisa Narita, Masayuki Yamada
    • Organizer
      The 10th International Conference on Leading Edge Manufacturing in 21st Century
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Integrated image analysis of structure and intracerebral perfusion of mice brain using a combined DKI-based IVIM analysis with DTI on preclinical MRI.2019

    • Author(s)
      Yamada M, Yamamoto H, Takano K, et al.
    • Organizer
      第47回日本磁気共鳴医学会大会. 2019.09.20-22. 熊本.
    • Related Report
      2019 Research-status Report
  • [Presentation] Detection of freqency-dependent activation of stress responces in the emotional nervous system by MEMRI.2019

    • Author(s)
      Harada S, Takano K, Miyake K, Hayashi K, Yamamoto H, Shirakawa S, Yamada M.
    • Organizer
      第47回日本磁気共鳴医学会大会. 2019.09.20-22. 熊本.
    • Related Report
      2019 Research-status Report
  • [Presentation] A method to detect coherent flows using diffusion weighted image intensity.2019

    • Author(s)
      Umezawa E, Fukuba T, Murayama K, Yamada M, et al.
    • Organizer
      第47回日本磁気共鳴医学会大会. 2019.09.20-22. 熊本.
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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