A synapsin Ⅰ cleavage fragment contributes to synaptic dysfunction in Alzheimer's disease.
A synapsin Ⅰ cleavage fragment contributes to synaptic dysfunction in Alzheimer's disease.
复制标题
突触蛋白→裂解片段导致阿尔茨海默病的突触功能障碍
作者:
Synaptic dysfunction is a key feature of Alzheimer's disease (AD). However, the molecular mechanisms underlying synaptic dysfunction remain unclear. Here, we show that synapsin Ⅰ, one of the most important synaptic proteins, is fragmented by the cysteine proteinase asparagine endopeptidase (AEP). AEP cleaves synapsin at N82 in the brains of AD patients and generates the C‐terminal synapsin Ⅰ (83–705) fragment. This fragment is abnormally distributed in neurons and induces synaptic dysfunction. Overexpression of AEP in the hippocampus of wild‐type mice results in the production of the synapsin Ⅰ (83–705) fragment and induces synaptic dysfunction and cognitive deficits. Moreover, overexpression of the AEP‐generated synapsin Ⅰ (83–705) fragment in the hippocampus of tau P301S transgenic mice and wild‐type mice promotes synaptic dysfunction and cognitive deficits. These findings suggest a novel mechanism of synaptic dysfunction in AD. Asparagine endopeptidase is activated in an age‐dependent manner in the brain. Active AEP cleaves synapsin I and generates the synapsin I C83 fragment, which affects the recycling of synaptic vesicles and causes synaptic dysfunction and cognitive impairment, promoting the onset of AD.
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影响因子:
34.7
作者:
Morrison, John H.;Baxter, Mark G.
通讯作者:
Baxter, Mark G.
影响因子:
14
作者:
Bereczki, Erika;Francis, Paul T.;Aarsland, Dag
通讯作者:
Aarsland, Dag
DOI:
10.1073/pnas.0600948103
发表时间:
2006-03-28
影响因子:
11.1
作者:
Jacobsen, JS;Wu, CC;Bloom, FE
通讯作者:
Bloom, FE
影响因子:
14.5
作者:
Bereczki, Erika;Branca, Rui M.;Aarsland, Dag
通讯作者:
Aarsland, Dag
影响因子:
56.9
作者:
Selkoe, DJ
通讯作者:
Selkoe, DJ