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2021 Fiscal Year Final Research Report

Analysis of the progression mechanism of neurodegenerative diseases

Research Project

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Project/Area Number 19K07860
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

MASUDA-SUZUKAKE Masami (増田雅美)  公益財団法人東京都医学総合研究所, 脳・神経科学研究分野, 主任研究員 (20583751)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywordsタウ / αシヌクレイン / 伝播 / モデルマウス
Outline of Final Research Achievements

Accumulation of assembled tau protein in the central nervous system is characteristic of Alzheimer’s disease and several other neurodegenerative diseases, called tauopathies. We developed a new mouse model of tau accumulation and propagation in brain. Single intracerebral injection of synthetic tau filaments induced by dextran sulphate into wild-type mice caused seeding of endogenous tau, followed by spreading to distinct areas in a time-dependent manner.
This study revealed that intracerebral injection of synthetic full-length wild-type tau seeds prepared in the presence of dextran sulphate caused tau propagation in non-transgenic mice. These findings establish that propagation of tau assemblies does not require tau to be either mutant and/or overexpressed.

Free Research Field

生化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、アルツハイマー病などのタウタンパク質の蓄積を伴う神経変性疾患の新規モデルマウスを確立した。このモデルは疾患早期の進行過程を再現しており、この系を用いた解析からアルツハイマー病の危険因子である「加齢」が病態の進行に促進的に働くことが明らかとなった。
この系はアルツハイマー病の進行過程の解明や進行過程を標的とした新規治療法開発への応用が期待できる。既に複数の研究室、製薬企業に導入されており、学術的需要の高いモデルである。

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Published: 2023-01-30  

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