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Elucidation of the pathogenic mechanism of taste disorder associated with amyloid beta accumulation, and development of the early diagnosis method for Alzheimer's disease.

Research Project

Project/Area Number 17K01416
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Medical systems
Research InstitutionKumamoto University

Principal Investigator

Hashimoto Koji  熊本大学, 大学院生命科学研究部(保), 助教 (20237936)

Co-Investigator(Kenkyū-buntansha) 米田 哲也  熊本大学, 大学院生命科学研究部(保), 准教授 (20305022)
國安 明彦  崇城大学, 薬学部, 教授 (90241348)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsアルツハイマー / 老人斑 / amyloid beta / PADRE / 味覚野 / リッキングテスト装置 / 認知症 / 味覚障害 / 味覚閾値 / リッキングテスト / 味覚行動学 / 大脳皮質味覚野 / 視床味覚野 / 扁桃体 / 逆行性投射 / 自家蛍光減弱法 / MRI / 鉄染色 / 味覚 / アミロイド / 嫌悪学習 / 嗅球切除
Outline of Final Research Achievements

This study aimed to establish a non-invasive and early detection method for diagnosis of taste disorder due to Alzheimer’s disease by amyloid beta deposition in the brain using a new MRI technique (phase difference enhanced imaging: PADRE). As a result of comparing the PADRE image of the human amyloid beta transgenic mouse brain with histological staining sections, a positive correlation was observed with regard to the amount and position of iron and amyloid plaques according to the age.
As a result of the tracer experiment, it was suggested that the rat cerebral gustatory cortex also had projections from the conventional gustatory cortex and the dorsal and caudal sites. We also investigated to improve the licking test device and the effective taste behavior experimental protocol.

Academic Significance and Societal Importance of the Research Achievements

アルツハイマー型認知症は根本的治療法はなく、発症すると短期間のうちに進行する。しかし、早期の発見は薬物治療により進行を緩やかにすることが次第に可能となってきている。従来のMRI撮像技術では出血部位、腫瘍など形態の観察に主眼が置かれていたが、磁性情報を従来のMRI撮像技術に加えたPADRE技術によりより鮮明に老人斑が描出できるようになり、平成25年頃よりMRIにPADREソフトウェアが実装されるようになってきている。一方、認知症の早期には味覚・嗅覚の異常が見られはじめることが指摘されているため、PADRE像での老人斑の量、位置情報を元に認知症の早期診断に利用できることが期待できる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2019 2017 Other

All Int'l Joint Research (3 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] Department of Psychology/Program in Neuroscience/Florida State University(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Department of Psychology/Program in Neuroscience/Florida State University(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Department of Psychology/Florida State University(米国)

    • Related Report
      2018 Research-status Report
  • [Presentation] Histological identification of the range of primary gustatory cortex in using the fluorescent retrograde neuronal tracer in rats.2019

    • Author(s)
      橋本弘司, Alan C. Spector
    • Organizer
      味と匂学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Histological identification of the range of primary gustatory cortex in using the fluorescent retrograde neuronal tracer in rats 2.2019

    • Author(s)
      橋本弘司, Alan C. Spector
    • Organizer
      第18回国際シンポジウム“味覚嗅覚の分子神経機構, ISMNTOP2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study on MR-Phase Distribution of Iron to Detect Amyloid-beta Plaque2017

    • Author(s)
      米田哲也
    • Organizer
      The 11th Australian and New Zealand Society for Magnetic Resonance Conference; 4th Dec. 2017;
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2022-01-27  

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