离子交换色谱作为一种简单且可扩展的方法,可以从条件介质中分离出生物活性的小细胞外囊泡
Ricardo Malvicini1,2,3,4, Diego Santa-Cruz1, Anna Maria Tolomeo3,4,5
1Laboratorio de Regulación Génica y Células Madre, Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMeTTyB), Universidad Favaloro-CONICET, Buenos Aires, Argentina.
PloS one
|September 15, 2023
概括
研究人员开发了一种可扩展的染色学方法,以从细胞培养基中分离细胞外囊泡 (EV). 这种方法产生了纯粹的,生物活跃的EV,适合临床应用和治疗用途.
科学领域:
- 生物技术和生物医学工程 生物技术和生物医学工程
- 细胞生物学和细胞外囊泡
背景情况:
- 细胞外囊泡 (EVs) 显示出作为生物标志物,药物输送系统和治疗药物的前景.
- 目前的EV隔离方法缺乏临床应用的标准化和可扩展性.
- 隔离技术的选择至关重要,取决于原材料和预期用途.
研究的目的:
- 开发一种简单,快速,可扩展和临床兼容的方法,以从条件介质中分离EV.
- 描述孤立的EV并评估它们的生物活性.
主要方法:
- 使用离子交换色谱 (Q Sepharose) 从条件介质中分离EV.
- 通过蛋白质/脂质度,CD63 ELISA,免疫类型定型,西斑 (TSG101,calnexin,cytochrome C),纳米粒子追踪分析 (NTA) 和传输电子显微镜 (TEM) 来表征化分数.
- 在体外评估免疫调节活性.
主要成果:
- 确定了含有缩EVs的单个峰值分数,平均颗粒大小<150nm.
- 孤立的EV表达了以下特征标记:CD9,CD63,CD81和TSG101.
- 第4部分的小EV (sEV) 在LPS刺激的巨细胞中表现出抗炎活性.
结论:
- 成功建立了一种染色学,可扩展和临床兼容的方法,用于从条件介质中分离和缩小型EV.
- 开发的方法保留了EVs的生物活性,使它们适合治疗应用.
- 该协议为EVs的临床生产提供了一个有前途的方法.
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