Item type |
共通(1) |
公開日 |
2017-12-18 |
タイトル |
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タイトル |
Mutation-induced loss of APP function causes GABAergic depletion in recessive familial Alzheimer's disease : analysis of Osaka mutation-knockin mice |
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言語 |
en |
作成者 |
梅田, 知宙
木村, 哲也
吉田, 佳世
高雄, 啓三
藤田, 有紀
松山, 正剛
酒井, 亜由美
山下, 港
en |
Yamashita, Minato
Osaka City University
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ja-Kana |
ヤマシタ, ミナト
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ja |
山下, 港
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Search repository
山下, 優希
en |
Yamashita, Yuki
Osaka City University
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ja-Kana |
ヤマシタ, ユキ
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ja |
山下, 優希
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Search repository
大西, 紀陽久
en |
Ohnishi, Kiyouhisa
Osaka City University
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ja-Kana |
オオニシ, キヨヒサ
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ja |
大西, 紀陽久
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Search repository
鈴木, 真美子
詫間, 浩
宮川, 剛
高島, 明彦
森田, 隆
森, 啓
富山, 貴美
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権利情報 |
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言語 |
ja |
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権利情報Resource |
https://creativecommons.org/licenses/by/4.0/ |
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権利情報 |
クリエイティブ・コモンズ 表示 4.0 国際 |
権利情報 |
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言語 |
en |
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権利情報Resource |
https://creativecommons.org/licenses/by/4.0/ |
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権利情報 |
Creative Commons Attribution 4.0 International |
権利情報 |
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言語 |
en |
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権利情報 |
© The Author(s). 2017 |
主題 |
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言語 |
ja |
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主題Scheme |
Other |
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主題 |
アルツハイマー病 |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Alzheimer's disease |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Recessive mutation |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Knockin mouse |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Loss of function |
主題 |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
GABA |
内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
The E693Δ (Osaka) mutation in APP is linked to familial Alzheimer's disease. While this mutation accelerates amyloid β (Aβ) oligomerization, only patient homozygotes suffer from dementia, implying that this mutation is recessive and causes loss-of-function of amyloid precursor protein (APP). To investigate the recessive trait, we generated a new mouse model by knocking-in the Osaka mutation into endogenous mouse APP. The produced homozygous, heterozygous, and non-knockin littermates were compared for memory, neuropathology, and synaptic plasticity. Homozygotes showed memory impairment at 4 months, whereas heterozygotes did not, even at 8 months. Immunohistochemical and biochemical analyses revealed that only homozygotes displayed intraneuronal accumulation of Aβ oligomers at 8 months, followed by abnormal tau phosphorylation, synapse loss, glial activation, and neuron loss. These pathologies were not observed at younger ages, suggesting that a certain mechanism other than Aβ accumulation underlies the memory disturbance at 4 months. For the electrophysiology studies at 4 months, high-frequency stimulation evoked long-term potentiation in all mice in the presence of picrotoxin, but in the absence of picrotoxin, such potentiation was observed only in homozygotes, suggesting their GABAergic deficit. In support of this, the levels of GABA-related proteins and the number of dentate GABAergic interneurons were decreased in 4-month-old homozygotes. Since APP has been shown to play a role in dentate GABAergic synapse formation, the observed GABAergic depletion is likely associated with an impairment of the APP function presumably caused by the Osaka mutation. Oral administration of diazepam to homozygotes from 6 months improved memory at 8 months, and furthermore, prevented Aβ oligomer accumulation, indicating that GABAergic deficiency is a cause of memory impairment and also a driving force of Aβ accumulation. Our findings suggest that the Osaka mutation causes loss of APP function, leading to GABAergic depletion and memory disorder when wild-type APP is absent, providing a mechanism of the recessive heredity. |
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言語 |
en |
内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
This study was supported by the Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan (no. 20023026, 21390271, 23110514, 25290018, 16K15132); by the Grant-in-Aid for Scientific Research on Innovative Areas (Comprehensive Brain Science Network) from the Ministry of Education, Culture, Sports, Science and Technology of Japan; by the Grants-in-Aid for Comprehensive Research on Dementia from the Ministry of Health, Labour, and Welfare, Japan; and in part by the Alzheimer's Association (IIRG-09-132,098). |
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言語 |
en |
出版者 |
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出版者 |
BioMed Central |
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言語 |
en |
言語 |
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言語 |
eng |
記事種別等 |
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内容記述タイプ |
Other |
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内容記述 |
Research |
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言語 |
en |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
識別子 |
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識別子 |
https://doi.org/10.1186/s40478-017-0461-5 |
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識別子タイプ |
DOI |
書誌情報 |
en : Acta Neuropathologica Communications
巻 5,
p. 59,
発行日 2017-07-31
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収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2051-5960 |