SIRT2
神经保护
乙酰化
海马结构
神经毒性
生物
细胞生物学
淀粉样前体蛋白
NAD+激酶
西妥因1
锡尔图因
化学
神经科学
下调和上调
阿尔茨海默病
生物化学
疾病
医学
内科学
毒性
基因
酶
有机化学
作者
Na Li,Ning Bai,Zhi‐Gang Xiong,Rong Cheng,Xuan Wu,Bo Jiang,Xiaoman Li,Mengyao Xue,Hongde Xu,Qiqiang Guo,Wendong Guo,Mengtao Ma,Sunrun Cao,Yanling Feng,Xiaoyu Song,Zhuo Wang,Xiaoyu Zhang,Yu Zhang,Difei Wang,Hua Liu,Liu Cao
出处
期刊:Aging Cell
[Wiley]
日期:2023-08-21
卷期号:22 (10)
被引量:2
摘要
Alzheimer's disease (AD) is an age-related neurodegenerative disorder characterized by amyloid-β (Aβ) deposition and neurofibrillary tangles. Although the NAD+ -dependent deacetylases SIRT1 and SIRT2 play pivotal roles in age-related diseases, their cooperative effects in AD have not yet been elucidated. Here, we report that the SIRT2:SIRT1 ratio is elevated in the brains of aging mice and in the AD mouse models. In HT22 mouse hippocampal neuronal cells, Aβ challenge correlates with decreased SIRT1 expression, while SIRT2 expression is increased. Overexpression of SIRT1 prevents Aβ-induced neurotoxicity. We find that SIRT1 impedes SIRT2-mediated APP deacetylation by inhibiting the binding of SIRT2 to APP. Deletion of SIRT1 reduces APP recycling back to the cell surface and promotes APP transiting toward the endosome, thus contributing to the amyloidogenic processing of APP. Our findings define a mechanism for neuroprotection by SIRT1 through suppression of SIRT2 deacetylation, and provide a promising avenue for therapeutic intervention of AD.
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