A biomimetic 3D DNA nanoplatform for enhanced capture and high-purity isolation of stem cell exosomes†

IF 2.7 3区 化学 Q2 CHEMISTRY, ANALYTICAL
Lingxia Meng, Tingting Zhao, Shuaiying Wang and Wenxiao Wang
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Abstract

Exosomes are uniformly sized vesicle-like bodies that cells secrete. Researchers now believe that exosomes can mediate various health and pathological processes. However, because the biophysical properties of exosomes are similar to those of other cell secretion products and biological fluids are rich and diverse, their separation and purification have always been challenging. Inspired by the adhesive domains in the tentacles of marine organisms that effectively capture and release mobile food particles, we have built a biomimetic 3D DNA nanoplatform. This platform not only captures exosomes efficiently but also allows for light-controlled exosome release. The surface of the 3D DNA nanoplatform can grow multivalent aptamers via rolling circle amplification. Aptamers fold into specific secondary structures that bind to CD63, a protein expressed on the surface of exosomes, enabling efficient exosome capture. As a photothermal reagent, the temperature of the DNA nanoplatform increases under near-infrared light irradiation, destroying the secondary structure of the CD63 aptamer and releasing the exosomes. Additionally, we have demonstrated that a 3D DNA nanoplatform with multivalent CD63 aptamer structures achieves more efficient and convenient stem cell exosome separation compared to ultracentrifugation. This strategy provides an efficient and high-purity way to capture and reversibly separate exosomes, and the separated ultrapure exosomes are used for enhancing wound healing by modulating migration and angiogenesis.

Abstract Image

用于增强捕获和高纯度分离干细胞外泌体的仿生3D DNA纳米平台。
外泌体是细胞分泌的均匀大小的囊泡状体。研究人员现在认为外泌体可以介导各种健康和病理过程。然而,由于外泌体的生物物理性质与其他细胞分泌产物相似,且生物体液丰富多样,其分离纯化一直具有挑战性。受海洋生物触手中有效捕获和释放移动食物颗粒的粘附域的启发,我们建立了一个仿生3D DNA纳米平台。该平台不仅有效地捕获外泌体,而且还允许光控外泌体释放。三维DNA纳米平台表面通过滚圈扩增可以生长多价适体。适配体折叠成特定的二级结构,与CD63结合,CD63是外泌体表面表达的一种蛋白质,能够有效地捕获外泌体。作为光热试剂,DNA纳米平台在近红外光照射下温度升高,破坏CD63适配体的二级结构,释放外泌体。此外,我们已经证明,与超离心相比,具有多价CD63适体结构的3D DNA纳米平台可以实现更有效和方便的干细胞外泌体分离。该策略为捕获和可逆分离外泌体提供了一种高效、高纯度的方法,分离的超纯外泌体可通过调节迁移和血管生成来促进伤口愈合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Analytical Methods
Analytical Methods CHEMISTRY, ANALYTICAL-FOOD SCIENCE & TECHNOLOGY
CiteScore
5.10
自引率
3.20%
发文量
569
审稿时长
1.8 months
期刊介绍: Early applied demonstrations of new analytical methods with clear societal impact
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