生物标志物 生物标志物
Maria Capdevila1, Raquel Puerta1, Rosanna Rossi2
1Ace Alzheimer Center Barcelona, Barcelona, Spain.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
血细胞外囊泡 (pEVs) 显示出作为早期阿尔茨海默病 (AD) 生物标志物的潜力. 对pEVs的蛋白质组分析揭示了与AD病理相关的特征,为轻度认知障碍阶段的早期诊断提供了希望.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物发现发现
- 蛋白质组学是指蛋白质组学.
背景情况:
- 阿尔茨海默病 (AD) 诊断通常发生在不可逆转的神经元损伤后.
- 轻度认知障碍 (MCI) 的早期诊断是一个重大挑战.
- 血细胞外囊泡 (pEVs) 正在成为早期AD生物标志物的有前途来源.
研究的目的:
- 评估pEVs在MCI和AD患者中的蛋白质组概况.
- 探索PEVs作为早期AD查工具的潜力.
- 为了确定新的基于血液的生物标志物用于AD检测.
主要方法:
- 通过超离心,将pEV从MCI Aβ(+) (n=50),MCI Aβ(-) (n=50) 和AD痴呆症 (n=43) 患者中分离出来.
- 使用纳米粒子追踪分析 (NTA) 和冷传输电子显微镜 (cryo-TEM) 进行pEV的表征.
- 使用Olink®蛋白质组 (炎症和神经学探索364个面板) 对脑脊液 (CSF),血清和PEV的蛋白质组分析.
主要成果:
- pEVs的表征证实了它们作为细胞外囊泡的身份.
- pEV生物标志物与已确立的AD标志物 (CSF Aβ42,p-tau181,血p-tau181,MMSE,年龄,qalb) 有相关性.
- 几个pEV神经学蛋白与他们的CSF对应物有显著的相关性,但不是血清对应物,表明中枢神经系统起源.
结论:
- pEV蛋白质签名可能表明在前期阶段的AD病理.
- pEV有潜力提供关于AD连续性的信息.
- 需要进一步的研究,以充分阐明电动汽车在AD发展和传播中的作用.
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