通过大小排除色谱和密度梯度超离心法从小量的血中分离小的细胞外囊:一项比较研究
Fang Kong1, Megha Upadya1, Andrew See Weng Wong2
1School of Biological Sciences, Nanyang Technological University, SINGAPORE.
bioRxiv : the preprint server for biology
|November 14, 2023
概括
从血中优化小细胞外囊泡 (sEV) 隔离对于生物标志物发现至关重要. SEC-DGUC方法提供了一种高效且可重复的方法,可以从小样本体积中获得纯SEV.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 纳米技术 纳米技术
背景情况:
- 小细胞外囊泡 (sEVs) 是血液中发现的关键生物标志物.
- 从血中分离高纯度的sEV是具有挑战性的,因为干扰蛋白和脂蛋白.
- 需要有效的隔离方法用于诊断和预后应用.
研究的目的:
- 优化尺寸排除染色法 (SEC) 和密度梯度超离心法 (DGUC) 的组合和序列,以隔离sEV.
- 为了提高sEV从小体积的血中分离的效率和纯度.
- 为了比较SEC-DGUC与DGUC-SEC协议的疗效.
主要方法:
- 两个协议进行了比较:SEC跟随DGUC (SEC-DGUC) 和DGUC跟随SEC (DGUC-SEC).
- 这两种方法都应用于小量的 (500微升) 人类血.
- 分离的sEVs使用流动细胞计和质谱学进行了表征.
主要成果:
- 无论是SEC-DGUC还是DGUC-SEC协议都产生了高纯度的SEV.
- SEC-DGUC组合显示出优异的性能,导致SEV蛋白和RNA含量更高.
- 鉴定证实了通过SEC-DGUC分离的sEV的质量和纯度.
结论:
- 优化的SEC-DGUC协议是高效和高度可复制的,用于隔离纯SEVs.
- 这种方法适用于处理小血量,促进生物标志物研究.
- SEC-DGUC为推进基于sEV的诊断和预后提供了一种有前途的方法.
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