尼卡司汀
体内
老年斑
化学
体外
神经炎症
阿尔茨海默病
早老素
淀粉样蛋白(真菌学)
细胞生物学
生物化学
生物
内科学
疾病
医学
遗传学
无机化学
作者
Chaeyoung Kim,Dong Woo Nam,Soo‐Jin Park,Hyung Geun Song,Hyun Seok Hong,Jung Hyun Boo,Eun Sun Jung,Yoonhee Kim,Ju Yuel Baek,Kwan Soo Kim,Jin Won Cho,Inhee Mook‐Jung
标识
DOI:10.1016/j.neurobiolaging.2012.03.001
摘要
Deposition of β-amyloid (Aβ) as senile plaques and disrupted glucose metabolism are two main characteristics of Alzheimer's disease (AD). It is unknown, however, how these two processes are related in AD. Here we examined the relationship between O-GlcNAcylation, which is a glucose level-dependent post-translational modification that adds O-linked β-N-acetylglucosamine (O-GlcNAc) to proteins, and Aβ production in a mouse model of AD carrying 5XFAD genes. We found that 1,2-dideoxy-2'-propyl-α-d-glucopyranoso-[2,1-D]-Δ2'-thiazoline (NButGT), a specific inhibitor of O-GlcNAcase, reduces Aβ production by lowering γ-secretase activity both in vitro and in vivo. We also found that O-GlcNAcylation takes place at the S708 residue of nicastrin, which is a component of γ-secretase. Moreover, NButGT attenuated the accumulation of Aβ, neuroinflammation, and memory impairment in the 5XFAD mice. This is the first study to show the relationship between Aβ generation and O-GlcNAcylation in vivo. These results suggest that O-GlcNAcylation may be a suitable therapeutic target for the treatment of AD.
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