Gerlach Jared Q, Maguire Ciaran M, Krüger Anja, Joshi Lokesh, Prina-Mello Adriele, Griffin Matthew D
Advanced Glycoscience Research Cluster (AGRC), National Centre for Biomedical Engineering Science (NCBES), National University of Ireland, Galway, Ireland.
Laboratory for Biological Characterization of Advanced Materials (LBCAM), School of Medicine, Trinity College Dublin, Ireland.
Nanomedicine (Lond). 2017 Jun;12(11):1217-1229. doi: 10.2217/nnm-2017-0016. Epub 2017 May 18.
AIM: The use of carbohydrate-binding proteins (lectins) to isolate urinary extracellular vesicles (uEVs) was investigated and the captured subpopulations were characterized. METHODS: Pooled uEVs from multiple healthy donors were exposed to lectin-conjugated or antibody-conjugated beads. Recovered uEVs were evaluated by protein estimation, transmission electron microscopy, nanoparticle tracking analysis and lectin microarray profiling. RESULTS: uEVs isolated by lectin- and antibody-based affinity capture exhibited distinct variations in size and surface content. Transmission electron microscopy confirmed similar EV diameters to those established by nanoparticle tracking analysis, but total particle counts did not correlate closely with protein-based quantification. Lectin microarray profiling demonstrated capture-dependent differences in surface glycosylation. CONCLUSION: Selective, carbohydrate-mediated EV isolation by lectin affinity approaches may prove immediately useful for research and find eventual use in clinical applications.
目的:研究使用碳水化合物结合蛋白(凝集素)分离尿液细胞外囊泡(uEVs),并对捕获的亚群进行表征。 方法:将来自多个健康供体的混合uEVs与凝集素偶联或抗体偶联的磁珠接触。通过蛋白质定量、透射电子显微镜、纳米颗粒跟踪分析和凝集素微阵列分析对回收的uEVs进行评估。 结果:通过基于凝集素和抗体的亲和捕获分离的uEVs在大小和表面成分上表现出明显差异。透射电子显微镜证实EV直径与纳米颗粒跟踪分析确定的直径相似,但总颗粒数与基于蛋白质的定量分析没有密切相关性。凝集素微阵列分析显示表面糖基化存在捕获依赖性差异。 结论:通过凝集素亲和方法进行选择性的、碳水化合物介导的EV分离可能对研究立即有用,并最终用于临床应用。
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