2023 Fiscal Year Final Research Report
Elucidation of the molecular mechanism by which neurodegeneration caused by tooth loss initiates Alzheimer's disease
Project/Area Number |
20K10296
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 57080:Social dentistry-related
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Research Institution | Kagoshima University |
Principal Investigator |
GOTO Tetsuya 鹿児島大学, 医歯学域歯学系, 教授 (70253458)
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Co-Investigator(Kenkyū-buntansha) |
松本 信英 鹿児島大学, 医歯学域医学系, 助教 (40432950)
白方 良典 鹿児島大学, 医歯学域歯学系, 准教授 (60359982)
倉本 恵梨子 鹿児島大学, 医歯学域歯学系, 助教 (60467470)
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Project Period (FY) |
2020-04-01 – 2024-03-31
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Keywords | アルツハイマー病 / アミロイドβ / 三叉神経中脳路核 / 抜歯 / 認知機能 |
Outline of Final Research Achievements |
In a mouse model of Alzheimer's disease (AD), ATF3-immunopositive cells, indicating cytotoxicity, appeared in the trigeminal mesencephalic nucleus (Vmes) as a result of tooth extraction, followed by cleaved-caspase-3 immunopositive cells, indicating cell death. A decrease in the number of blue nucleus neurons was also observed. In addition, the time to dementia-like behavior was shortened by tooth extraction by about one-fourth compared to 3xTg-AD mice that did not undergo tooth extraction. Furthermore, autophagy-like membranes were found in Vmes neurons in another AD mouse, suggesting that autophagy is involved in the aging process of neurons.
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Free Research Field |
口腔解剖学
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Academic Significance and Societal Importance of the Research Achievements |
歯数の減少がアルツハイマー病(AD)のリスクファクターであることは、多くの臨床研究で示唆されているが、そのメカニズムはよくわかっていない。我々はADモデルマウスを抜歯することにより関連する神経にどのような神経変性が生じ、ADの進行を早めるか実験的に検証した。その結果、歯の喪失により三叉神経中脳路核―青班核―海馬という神経変性の連鎖が生じることによってADの進行が早まることが明らかとなった。
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