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从小鼠模型血液中改善小细胞外囊泡的隔离
Gloria Venturini1,2, Antonella Ferrante1, Nazzareno Di Carlo1
1National Centre for drug research and evaluation, Italian National Institute of Health, Rome 00161, Italy.
Extracellular vesicles and circulating nucleic acids
|January 20, 2026
概括
尺寸排除色谱 (SEC) 与超离心法相比,可以从小鼠血中优异地分离小细胞外囊泡 (sEVs). 这种方法通过提高sEV产量和纯度来增强临床前研究中的生物标志物发现.
科学领域:
- 生物化学 生物化学
- 纳米技术 纳米技术
- 生物标志物发现发现
背景情况:
- 小细胞外囊泡 (sEVs) 是各种疾病的关键生物标志物.
- 血液是用于非侵入性生物标志物检测的主要来源.
- 鼠标模型对于研究疾病机制和治疗策略至关重要.
研究的目的:
- 为了比较从小鼠血液中分离sEVs的两种方法:大小排除染色法 (SEC) 和超离心法与酸密度梯度 (UC-IDG).
- 为了优化从小量的血和血清中对sEV的隔离,用于临床前研究.
- 确定下游生物标志物发现的最有效的协议.
主要方法:
- 从小鼠血和血清中分离sEV的SEC和UC-IDG的比较.
- 对小样本体积的隔离协议的优化.
- 使用纳米粒子追踪分析,电子显微镜和HPLC-MS/MS蛋白质组学评估产量,纯度和蛋白质含量.
主要成果:
- 与UC-IDG相比,SEC产生了更多的sEV和与EV相关的标记物,污染蛋白更少.
- 血产生了比血清更清洁的sEV制剂,蛋白质聚合物比血清少.
- 在提高囊泡产量和纯度方面,SEC表现出卓越的性能.
结论:
- 血是EV隔离的更可靠来源,而不是小鼠模型中的血清.
- 对于生物标志物研究而言,SEC是一种比UC-IDG更适合的方法来分离高纯度的sEV.
- 这项研究为sEV隔离提供了一个优化的协议,在临床前研究中推进生物标志物发现.
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