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Author:
Date:
2020-06-05
[Abstract] Exosomes, a subtype of extracellular vesicles, are nanovesicles of endocytic origin. Exosomes contain a plethora of proteins, lipids, and genetic materials of parent cells to facilitate intercellular communications. Tracking exosomes in vivo is fundamentally important to understand their biodistribution pattern and the mechanism of biological actions in experimental models. Until now, a number of tracking protocols have been developed, including fluorescence labeling, bioluminescence imaging, magnetic resonance imaging, and computed tomography (CT) tracking of exosomes. Recently, we have shown the tracking and quantification of exosomes in a spinal cord injury model, by using two tracking approaches. More specifically, following intranasal administration of gold ...
[摘要] [摘要 ] 外泌体是细胞内囊泡的一种亚型,是内吞起源的纳米囊泡。外泌体含有过多的蛋白质,脂质和亲代细胞的遗传物质,可促进细胞间的通讯。在体内追踪外泌体对于了解其生物分布模式和分子结构至关重要。迄今为止,已经开发出了许多跟踪方案,包括荧光标记,生物发光成像,磁共振成像以及外泌体的计算机断层扫描(CT)跟踪。通过两种追踪方法对脊髓损伤模型中的外泌体进行定量分析。更具体地说,在将金纳米颗粒包裹的外泌体鼻内给药于完全脊髓损伤的大鼠后,使用microCT 追踪整个中枢神经系统的外泌体,并通过使用电感耦合等离子体和fla定量 另外,进行了荧光标记的外泌体的光学成像,以了解与健康对照相比,在脊髓病变中迁移的外泌体的丰度,并进一步检查它们对病变中不同细胞类型的亲和力。因此,本文提出的方案有助于研究脊髓损伤情况下细胞和器官水平上的外泌体生物分布。该协议还将使研究人员能够在其他感兴趣的模型中更好地阐明外来体的命运。
[背景 ]外泌体是内体来源的天然纳米囊泡(直径为30-150 nm),由间充质干细胞(MSCs)等多种细胞分泌(Yang 等,2018)。外泌体携带蛋白质,脂质和遗传物质。亲本细胞,并且能够对邻近或远端的细胞和组织产生多种生物学效应(Valadi 等,2007;van Niel ...
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