一种可扩展的基于过的方法,用于隔离外聚物和其他纳米级的细胞外粒子
Thomas Scarborough1, Yuki Kawai-Harada2,3, Olivia Brennan1
1Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
触流过有效地分离出外体,一种提供治疗性RNA的非膀外细胞粒子 (NVEP). 外体miRNAs表现出了显著的稳定性,这表明了先进的RNA疗法的潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 细胞外粒子,包括细胞外囊泡 (EVs) 和非囊泡细胞外粒子 (NVEPs),通过生物分子转移调解细胞间通信.
- 异构体是NVEP的一类,由于有效的miRNA转移,它显示出治疗性RNA输送的前景.
- 目前对外体隔离的局限性阻碍了它们的治疗应用.
研究的目的:
- 评估触流过 (TFF) 作为一种可扩展的异构体隔离方法.
- 为了比较TFF分离的外体与通过超离心法获得的外体.
- 为了描述TFF分离的外体的稳定性和miRNA含量.
主要方法:
- 根据尺寸分离细胞外颗粒,研究了触流过法 (TFF).
- 使用差异超离心法作为基准隔离方法.
- 分析了分离的粒子组成,包括RNAi蛋白和miRNAs,并评估了miRNA对核酶,蛋白酶和表面活性剂的稳定性.
主要成果:
- 与EVs相比,TFF成功分离了外体,证明了与RNAi组件 (AGO2,HSP90AB1) 和独特的miRNAs的丰富.
- 外体miRNAs表现出显著的抵抗核酶降解,即使在蛋白质酶和表面活性剂处理后.
- TFF隔离的纯度和相同性与差异超离心法相当.
结论:
- 触流过是一种有效和可扩展的方法来隔离外聚物.
- 异构体代表稳定,非膀性复合体,有可能在体内延长半衰期.
- 基于TFF的外体隔离可以使新型RNA疗法的生物过程成为可能,可能会超过当前标准.
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