在阿尔茨海默氏病中,底层的分子机制 氨基酸β介导血管细胞粘附分子-1的升调
Vrishali S Salian1, Xiaojia Tang1, Kevin J Thompson1
1Department of Pharmaceutics and Brain Barriers Research Center, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota (V.S.S., K.K.K.); Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota (G.L.C., V.J.L.); Department of Quantitative Health Sciences, Mayo Clinic, Rochester, Minnesota (X.T., K.J.T., K.R.K.); and Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota (L.L.).
阿尔茨海默病涉及到脑血管炎症. 胺β 42 (Aβ42) 暴露会通过 Src/p38/MEK 途径增加血管细胞粘附分子-1 (VCAM-1) 在血脑屏障上,从而提供新的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 病理学 病理学 病理学
背景情况:
- 阿尔茨海默病 (AD) 病理的特征是粉样β (Aβ) 和神经纤维细胞结.
- 大脑血管炎症在阿尔茨海默病患者中很普遍,这表明它作为核心病理特征的作用.
- 血管细胞粘附分子-1 (VCAM-1) 是血脑屏障 (BBB) 炎症的关键标志物.
研究的目的:
- 调查Aβ42暴露会增加BBB的VCAM-1表达的假设.
- 阐明了Aβ42诱导的VCAM-1表达背后的分子机制.
- 探索VCAM-1作为AD相关的脑血管炎症的潜在诊断和治疗点.
主要方法:
- 对AD患者大脑中的炎症信号通路和VCAM-1表达的分析.
- 在APP,PS1转基因小鼠中的动态SPECT/CT成像过度表达Aβ42.2.
- 使用人类大脑微血管内皮细胞单层的体外研究.
- 反相蛋白阵列和免疫细胞化学,以确定分子通路.
主要成果:
- 炎症信号通路受到上调,AD患者大脑中的VCAM-1表达增加.
- 在转基因小鼠中,Aβ42暴露在BBB上显示了VCAM-1表达的增加.
- 已经证明,Aβ42可以通过内皮细胞中的Src/p38/MEK信号通路来增加VCAM-1的表达.
结论:
- 暴露于Aβ42驱动了通过Src/p38/MEK通路在BBB的VCAM-1上调.
- 准Src/p38/MEK通路可能会减轻AD中脑血管炎症.
- 通过SPECT/CT成像检测的VCAM-1检测显示了在AD中诊断脑血管炎症的潜力.
相关概念视频
Alzheimer's Disease: Overview
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
Amyloid Fibrils
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Intracellular Signaling Affects Focal Adhesions
Some...
Regulation of Angiogenesis and Blood Supply
Immunoglobulin-like Cell Adhesion Molecules
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...


