M1 muscarinic acetylcholine receptor interacts with BACE1 and regulates its proteosomal degradation

M1 muscarinic acetylcholine receptor interacts with BACE1 and regulates its proteosomal degradation
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M1 毒蕈碱乙酰胆碱受体与 BACE1 相互作用并调节其蛋白体降解

DOI:
10.1016/j.neulet.2012.03.026
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发表时间:
2012-05
影响因子:
2.5
通讯作者:
Zhang, Yun-wu
Zhang, Yun-wu
中科院分区:
医学4区
文献类型:
--
作者:
Jiang, Shangtong;Wang, Yan;Ma, Qilin;Zhou, Aina;Zhang, Xian;Zhang, Yun-wu

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阿尔茨海默病(AD)发病的罪魁祸首之一是β-淀粉样蛋白(A-β)的过度产生/聚集,它是由β-淀粉样前体蛋白通过β位点APP裂解蛋白1(BACE1)和γ-分泌酶顺序切割而产生的。散发性AD患者BACE1水平/活性升高,识别影响BACE1的蛋白在AD研究中具有重要意义。在这里,我们发现M1mAChR是一种重要的G蛋白偶联受体,参与胆碱能神经元的活动,它可以与BACE1相互作用并介导其蛋白酶体的降解。此外,M1mAChR的过表达和下调可以分别降低和增加BACE1的水平,以及Aβ的产生。这些发现表明,在AD和可能的精神分裂症中,BACE1和M1 mAChR存在一种新的偶联。
A prime culprit in the pathogenesis of Alzheimer's disease (AD) is overproduction/aggregation of β-amyloid (Aβ), which is derived from β-Amyloid Precursor Protein through sequential cleavages by β-site APP cleaving protein 1 (BACE1) and γ-secretase. The level/activity of BACE1 is elevated in sporadic AD and identification of proteins that affect BACE1 is important in AD research. Here we found that M1 Muscarinic acetylcholine receptor (M1 mAChR), an important G protein-coupled receptor involved in cholinergic neuronal activity, can interact with BACE1 and mediate its proteosomal degradation. Moreover, overexpression and downregulation of M1 mAChR can decrease and increase the levels of BACE1, as well as the generation of Aβ, respectively. These findings point to a novel coupling of BACE1 and M1 mAChR in AD and possibly schizophrenia.
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