2023 Fiscal Year Final Research Report
The role of the specific tau sequence on the formation of tau strain
Project/Area Number |
20K16160
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 49010:Pathological biochemistry-related
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Research Institution | Juntendo University |
Principal Investigator |
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Project Period (FY) |
2020-04-01 – 2024-03-31
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Keywords | tau / tauopathy / tau凝集 / strain |
Outline of Final Research Achievements |
It is important to understand how tau protein forms aggregate with different structures and properties in different tauopathy in order to elucidate the pathogenesis of neurodegenerative diseases and to develop new drugs. We found that Asn-368 residue of tau is important for the formation of tau aggregate structure, which is unique to Alzheimer's disease (AD). Mutations in this residue have little effect in non-AD tauopathies such as corticobasal degeneration (CBD), thus Asn-368 is a specific site for AD-tau aggregation. Elucidation of the role of Asn-368 in AD-tau aggregation may lead to a better understanding of the molecular mechanisms of disease-specific differences in tau aggregate structure.
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Free Research Field |
生化学
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Academic Significance and Societal Importance of the Research Achievements |
Tauが疾患ごとに異なる構造を取りながら凝集する分子機構は未だに不明である。しかし本研究では、ADにおけるtau凝集においてのみ重要な役割を果たしているtauの部位としてAsn-368を初めて同定した。今後、Asn-368がAD-tau凝集においてどのように働き、また非AD tau凝集においてはなぜ積極的な役割を持たないかを解明することが、tauの凝集多型形成の分子機構の理解へとつながるところに学術的意義がある。加えて、こうしたtau凝集の分子機構の解明は、tau凝集阻害薬のデザインにも資するものであり、認知症克服のための創薬基盤としての社会的意義も持つ。
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