High-throughput fluorescence correlation spectroscopy enables analysis of surface components of cell-derived vesicles.

High-throughput fluorescence correlation spectroscopy enables analysis of surface components of cell-derived vesicles.
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DOI:
10.1007/s00216-020-02485-z
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发表时间:
2020-04
影响因子:
4.3
通讯作者:
Richards CI
Richards CI
中科院分区:
化学2区
文献类型:
--
作者:
Fu X;Song Y;Masud A;Nuti K;DeRouchey JE;Richards CI

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细胞外囊泡(EV)和细胞衍生的囊泡(CDV),通过破碎细胞膜产生的,都已被探索作为治疗递送载体。这些囊泡上的表面蛋白是非常重要的,因为它们是起源细胞的特征并且调节囊泡与靶细胞的相互作用。在这里,我们介绍了一种高通量的荧光相关光谱(ht-FCS)的方法,能够表征囊泡表面蛋白在大量的样品。我们使用自动化筛选和采集FCS数据,以基于抗体-囊泡相互作用后扩散时间的变化高保真地分析细胞衍生囊泡的表面蛋白。我们使用已知外泌体生物标志物的抗体对4种细胞类型产生的囊泡进行了表征。本文提出的ht-FCS技术提供了针对表面标志物文库筛选EV或细胞衍生的囊泡或以高速筛选细胞衍生的囊泡文库的特异性鉴定标志物的能力。
Extracellular vesicles (EVs) and cell-derived vesicles (CDVs), generated by fragmenting cellular membranes, have both been explored as therapeutic delivery vehicles. Surface proteins on these vesicles are of great importance as they are characteristic to the cell of origin and modulate vesicle interactions with target cells. Here we introduced a high throughput fluorescence correlation spectroscopy (ht-FCS) approach capable of characterizing vesicle surface proteins across a large number of samples. We used automated screening and acquisition of FCS data to profile surface proteins of cell-derived vesicles with high fidelity based on changes in diffusion time upon antibody-vesicle interactions. We characterized vesicles generated from 4 cell types using antibodies for known exosome biomarkers. The ht-FCS technique presented here offers the capability to screen EVs or cell derived vesicles against a library of surface markers or to screen a library of cell-derived vesicles for a specific identifying marker at a high speed.
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