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Immune Profiling of Polysaccharide Submicron Vesicles
Biomacromolecules ( IF 5.5 ) Pub Date : 2018-07-16 00:00:00 , DOI: 10.1021/acs.biomac.8b00832
Chiara C. Toma 1 , Alessandra Aloisi 1, 2 , Valentina Bordoni 3 , Riccardo Di Corato , Martina Rauner , Gianaurelio Cuniberti , Lucia G. Delogu 3, 4, 5 , Rosaria Rinaldi 2
Affiliation  

Alginate (ALG) and chitosan (CS) have been extensively used for biomedical applications; however, data relative to immune responses exerted by them are scarce. We synthesized a submicron vesicle system (SV) displaying a CS shell over an ALG core. Intravenous injection of these promising carriers could be a possible route of delivery; therefore, we evaluated their impact on human peripheral blood mononuclear cells (PBMCs). By this ex vivo approach, we established how SV chemical–physical characteristics affected the immune cells in terms of cellular uptake, viability, and state of activation. By flow cytometry, we demonstrated that SVs were internalized by PBMCs with differential trends. No substantial necrotic and apoptotic signals were recorded, and SVs weakly affected activation status of PBMCs (concerning the markers CD69, CD25, CD80, and the cytokines TNF-α and IL-6), showing high immune biocompatibility and low immunomodulating properties. Our findings gain particular value toward the biomedical applications of SVs and make these polymer-based structures more attractive for translation into clinical uses.

中文翻译:

多糖亚微米囊泡的免疫分析

海藻酸盐(ALG)和壳聚糖(CS)已被广泛用于生物医学应用。然而,关于它们所发挥的免疫反应的数据却很少。我们合成了在ALG核上显示CS壳的亚微米囊泡系统(SV)。静脉注射这些有希望的载体可能是一种可能的分娩途径。因此,我们评估了它们对人外周血单个核细胞(PBMC)的影响。通过这种离体方法,我们确定了SV的化学-物理特性如何在细胞摄取,生存能力和激活状态方面影响免疫细胞。通过流式细胞仪,我们证明了SVs被具有不同趋势的PBMC内化了。没有记录到实质性的坏死和凋亡信号,并且SV弱影响了PBMC的激活状态(关于标记CD69,CD25,CD80,细胞因子TNF-α和IL-6),具有较高的免疫生物相容性和较低的免疫调节特性。我们的发现对SV的生物医学应用具有特别的价值,并使这些基于聚合物的结构对于转化为临床用途更具吸引力。
更新日期:2018-07-16
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