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Abstract

Biochemistry

从骨髓来源的巨噬细胞中鉴定小细胞外囊泡的肽

Published: June 30th, 2023

DOI:

10.3791/65521

1School of Basic Medical Sciences, Anhui Medical University, 2State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, 3School of Life Sciences, Hebei University

Abstract

小细胞外囊泡 (sEV) 通常由多泡体 (MVB) 的胞吐作用分泌。这些直径为<200nm的纳米囊泡存在于各种体液中。这些 sEV 通过其货物(如蛋白质、DNA、RNA 和代谢物)调节各种生物过程,例如基因转录和翻译、细胞增殖和存活、免疫和炎症。目前,已经开发了各种用于sEV分离的技术。其中,基于超速离心的方法被认为是金标准,广泛用于sEV分离。肽是天然生物大分子,长度少于50个氨基酸。这些肽参与具有生物活性的各种生物过程,如激素、神经递质和细胞生长因子。肽球用于通过液相色谱-串联质谱(LC-MS/MS)系统分析特定生物样品中的内源性肽。在这里,我们介绍了一种通过差示超速离心分离sEV的方案,并提取了肽球用于LC-MS / MS鉴定。该方法从骨髓来源的巨噬细胞中鉴定了数百种sEVs衍生的肽。

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