纳米颗粒
纤维
淀粉样蛋白(真菌学)
纳米技术
解聚
神经毒性
P3肽
淀粉样变性
小胶质细胞
疾病
阿尔茨海默病
化学
生物物理学
材料科学
生物化学
淀粉样前体蛋白
医学
生物
炎症
病理
免疫学
无机化学
有机化学
毒性
作者
Qianhua Feng,Ning Wang,Xueli Zhang,Yongxia Mei,Rongkun Fu,Jing Chen,Xiying Yuan,Shuaiqi Yang,Zhenzhong Zhang,Hongjuan Zhao,Lei Wang
出处
期刊:Nano Today
[Elsevier]
日期:2023-02-01
卷期号:48: 101756-101756
被引量:8
标识
DOI:10.1016/j.nantod.2023.101756
摘要
Aberrant amyloid-β (Aβ) fibrillation is the key event in Alzheimer’s disease (AD), the depolymerization and removal of which are being pursued with enthusiasm. Herein, a nanoparticle cluster is designed for amyloid-matching based on point-to-point strategy to prevent amyloid fibrillation. After reaching AD nidus, this cluster decomposes into ultra-small nanoparticles, and exposes more binding sites in different types to match with Aβ sequence via multivalent binding. Notably, AD microenvironment sensitive nucleophilic substitution reaction generates strong covalent linkage between nanoparticle and amyloid, which ensures high binding specificity/affinity. The strong binding event competitively reduces amyloid-amyloid interactions thereby disintegrating amyloid fibrils. Not only that, monomeric Aβ after fibrils depolymerization and nanoparticles reassemble into nanoparticle&Aβ composite. Such composite realizes Aβ receptor mediated precise rapamycin delivery into microglia, further normalizing microglial immunologic dysfunction for Aβ removal and brain-friendly environment. This system interferes with amyloid fate, rescues memory deficits in AD.
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