VPS35 haploinsufficiency increases Alzheimer's disease neuropathology.
VPS35 haploinsufficiency increases Alzheimer's disease neuropathology.
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DOI:
10.1083/jcb.201105109
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发表时间:
2011-11-28
期刊:
影响因子:
--
通讯作者:
Xiong WC
中科院分区:
文献类型:
--
作者:
Wen L;Tang FL;Hong Y;Luo SW;Wang CL;He W;Shen C;Jung JU;Xiong F;Lee DH;Zhang QG;Brann D;Kim TW;Yan R;Mei L;Xiong WC
The retromer complex component VPS35 prevents activation of the BACE1 and Aβ production and thus plays an essential role in limiting Alzheimer’s disease neuropathology. VPS35, a major component of the retromer complex, is important for endosome-to-Golgi retrieval of membrane proteins. Although implicated in Alzheimer’s disease (AD), how VPS35 regulates AD-associated pathology is unknown. In this paper, we show that hemizygous deletion of Vps35 in the Tg2576 mouse model of AD led to earlier-onset AD-like phenotypes, including cognitive memory deficits, defective long-term potentiation, and impaired postsynaptic glutamatergic neurotransmission in young adult age. These deficits correlated well with an increase of β-amyloid peptide (Aβ) level in the mutant hippocampus. We further demonstrate that VPS35 is predominantly expressed in pyramidal neurons of young adult hippocampus and interacts with BACE1, a protease responsible for Aβ production. Loss of VPS35 function in the mouse hippocampus increased BACE1 activity. Suppression of VPS35 expression in culture decreased BACE1 trans-Golgi localization but enriched it in endosomes. These results demonstrate an essential role for VPS35 in suppression of AD neuropathology and in inhibition of BACE1 activation and Aβ production by promoting BACE1 endosome-to-Golgi retrieval.
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