生物标志物 生物标志物
Rafaela Luiza Costa Franco1,2, Debora Afonso Silva Rocha2, Thaís Lopes Pinheiro2
1Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
通过比较血细胞外囊泡 (EV) 隔离方法,ExoQuick ULTRA和尺寸排除色谱 (SEC),在检测神经退行性疾病生物标志物方面表现优越. 这些发现推动了针对阿尔茨海默病等疾病的基于血液的生物标志物发现.
科学领域:
- 生物化学 生物化学
- 纳米技术纳米技术
- 神经科学是一个神经科学.
背景情况:
- 血中的细胞外囊泡 (EVs) 是神经退行性疾病的有希望的非侵入性生物标志物.
- 从复杂等离子体中隔离EV的挑战阻碍了生物标志物检测.
- 优化EV隔离对于诊断工具的临床翻译至关重要.
研究的目的:
- 为了比较不同的血细胞外囊泡 (EV) 隔离技术.
- 确定检测神经退行性疾病生物标志物的最有效方法.
- 使用Simoa HD-X平台评估电动汽车隔离方法.
主要方法:
- 使用超离心,沉 (ExoQuick ULTRA),尺寸排除色谱 (SEC) 和SmartSEC,分离了等离子EV.
- 纳米粒子跟踪分析 (NTA) 和传输电子显微镜 (TEM) 描述了EV的大小,度和形态.
- 超敏感的Simoa HD-X免疫测试用于检测EV货物中的神经退行性生物标志物 (NfL,GFAP).
主要成果:
- SEC产生了最高的颗粒度 (10^14颗粒/毫升),而ExoQuick ULTRA和超级离心法产生了10^13颗粒/毫升.
- TEM显示,SEC提供了具有大小异质性的高颗粒产量 (100-1000纳米),而ExoQuick ULTRA提供了更高的纯度 (30-150纳米外体).
- 更高纯度的方法没有产生可检测的生物标志物水平与标准血体积,需要进一步评估.
结论:
- 埃克索奎克ULTRA和SEC在血EV隔离方面表现出卓越的性能.
- 这些方法正在进一步评估,以加强神经退行性生物标志物检测.
- 这些发现支持开发高效的EV隔离技术,以血液为基础的生物标志物.
相关概念视频
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These markers indicate stress or strain on the heart muscle:
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Cardiac myocytes produce these hormones in response to ventricular stretching...
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Cardiac myocytes produce these hormones in response to ventricular stretching...
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