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The prospects of the brain tumor resection including awake surgery by the combination of new language function mapping method and fluorescence spectrometric analysis technique

Research Project

Project/Area Number 17K16621
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Neurosurgery
Research InstitutionAsahikawa Medical College

Principal Investigator

TAMURA YUKIE  旭川医科大学, 医学部, 助教 (30723879)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords定量 / 蛍光強度 / プロトポルフィリンⅨ / 5アミノレブリン酸 / 分光器 / 悪性度 / passive language mapping / glioma / 共焦点顕微鏡 / 5ALA / PpⅨ / 脳腫瘍学 / 機能脳神経外科学
Outline of Final Research Achievements

We cannot distinguish the neoplastic cell from normal cell because of a tumor permeating the normal organization.But if 5-ALA are administered orally before surgery, A metabolism product(PpⅨ) accumulates to the neoplastic cell and it is told to be identifiable in a thing with the fluorescence by excitation light. However, it is not found about the mechanism of the accumulation that is a tumor-specific of PpⅨ. In this study, I developed the system "Spectrum Insight", which could assay intensity of fluorescence in real time during the surgery by the spectroscope which put on a microscope. Furthermore, I assay an interstitial material particularly the PpⅨ, and I showed intensity of fluorescence and the stockpile of the PpⅨ, the association with the histopathological malignancy.

Academic Significance and Societal Importance of the Research Achievements

腫瘍細胞と正常組織は肉眼的に判別は難しいが、5-ALAの術前投与により、その代謝産物(PpⅨ)が腫瘍細胞に特異的に蓄積し、励起光により蛍光を呈することで腫瘍細胞の同定が可能とされている。また、蛍光強度と腫瘍細胞密度との相関関係もいわれているが、その蓄積のメカニズムについては、いまだ明らかにされていない。
本研究では、この蛍光強度を術中リアルタイムに定量化を可能としたシステム”Spectrum Insight”を開発した。さらに腫瘍組織内のPpⅨの定量も行い、蛍光強度との関連性を示せた。
本研究結果が、PpⅨ蓄積メカニズムの解明につながると考えられた。

Report

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

    (2 results)

All 2018

All Presentation (2 results)

  • [Presentation] 5ALA蛍光定量化による術中組織モニタリングへの展望2018

    • Author(s)
      田村 有希恵
    • Organizer
      第22回北海道脳腫瘍懇話会
    • Related Report
      2017 Research-status Report
  • [Presentation] 覚醒下手術における 新たな脳機能マッピング法 ”Passive language mapping”の展望2018

    • Author(s)
      田村 有希恵
    • Organizer
      第4回脳神経外科BMI懇話会
    • Related Report
      2017 Research-status Report

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

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