积累β-粉样蛋白导致海马体Lynx1和Lypd6B表达的减少,海马体和血清中炎症前导细胞因子的表达增加
M L Bychkov1, A V Kirichenko1, A S Paramonov1
1Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.
Doklady. Biochemistry and biophysics
|October 13, 2023
概括
阿尔茨海默病涉及粉样β的积累和炎症. 这项研究发现,在阿尔茨海默氏症模型小鼠中,关键蛋白质Lynx1和SLURP-1的水平降低,可能会恶化神经炎症和α7-nAChR受体功能障碍.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 阿尔茨海默病 (AD) 的特征是β-粉样类寡合体的积累,α7-尼古丁性乙胆受体 (α7-nAChR) 功能障碍和神经炎症.
- 神经调节器Lynx1,Ly6/uPAR蛋白家族的一部分,之前已经表明与β-粉样蛋白竞争α7-nAChR结合.
- Ly6/uPAR蛋白质在调节受体活性和炎症过程中发挥作用.
研究的目的:
- 为了研究Ly6/uPAR家族蛋白质在2xTg-AD小鼠海马中的表达和定位,阿尔茨海默病模型.
- 在AD的背景下探索Ly6/uPAR蛋白表达,α7-nAChR功能和神经炎症之间的关系.
- 在AD模型小鼠中评估与Ly6/uPAR蛋白水平相关的全身炎症标志物.
主要方法:
- 实时PCR用于量化Lynx1,Lypd6b,PSD95和TNFα的基因表达水平.
- 进行了血清化学分析,以确定Lynx1和α7-nAChR在海马中的局部化.
- 测量了SLURP-1和益炎性细胞因子 (TNFα,TNFβ) 的血清水平,以评估系统性炎症.
主要成果:
- 2xTg-AD小鼠表现出Lynx1,Lypd6b和PSD95基因的表达减少,以及海马中TNFα基因表达增加.
- 组织化学分析显示,2xTg-AD小鼠海马体中Lynx1和α7-nAChR之间缺乏局部化.
- 系统性炎症在2xTg-AD小鼠中明显,血清SLURP-1水平降低,TNFα和TNFβ细胞因子度升高.
结论:
- 在AD模型小鼠的海马体中减少Ly6/uPAR蛋白的表达,包括Lynx1和Lypd6b,可能会导致α7-nAChR功能障碍.
- 观察到Lynx1/α7-nAChR局部化的缺乏表明神经调节受损,可能会加剧β-粉样蛋白诱导的病理.
- 抗炎性SLURP-1的水平降低和促炎性细胞因子的增加表明Ly6/uPAR蛋白质失调与阿尔茨海默病的炎症微环境之间存在联系.
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