小胶质细胞
发病机制
促炎细胞因子
转基因小鼠
神经科学
先天免疫系统
转基因
阿尔茨海默病
神经炎症
神经退行性变
免疫学
免疫系统
生物
医学
炎症
疾病
病理
基因
生物化学
作者
Amy K.Y. Fu,Kwok-Wang Hung,Michael Y. F. Yuen,Xiaopu Zhou,D.S.Y. Mak,I.C.W. Chan,Tom H. Cheung,Baorong Zhang,Wing‐Yu Fu,Foo Y. Liew,Nancy Y. Ip
标识
DOI:10.1073/pnas.1604032113
摘要
Alzheimer's disease (AD) is a devastating condition with no known effective treatment. AD is characterized by memory loss as well as impaired locomotor ability, reasoning, and judgment. Emerging evidence suggests that the innate immune response plays a major role in the pathogenesis of AD. In AD, the accumulation of β-amyloid (Aβ) in the brain perturbs physiological functions of the brain, including synaptic and neuronal dysfunction, microglial activation, and neuronal loss. Serum levels of soluble ST2 (sST2), a decoy receptor for interleukin (IL)-33, increase in patients with mild cognitive impairment, suggesting that impaired IL-33/ST2 signaling may contribute to the pathogenesis of AD. Therefore, we investigated the potential therapeutic role of IL-33 in AD, using transgenic mouse models. Here we report that IL-33 administration reverses synaptic plasticity impairment and memory deficits in APP/PS1 mice. IL-33 administration reduces soluble Aβ levels and amyloid plaque deposition by promoting the recruitment and Aβ phagocytic activity of microglia; this is mediated by ST2/p38 signaling activation. Furthermore, IL-33 injection modulates the innate immune response by polarizing microglia/macrophages toward an antiinflammatory phenotype and reducing the expression of proinflammatory genes, including IL-1β, IL-6, and NLRP3, in the cortices of APP/PS1 mice. Collectively, our results demonstrate a potential therapeutic role for IL-33 in AD.
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