A Stable Biotin-Streptavidin Surface Enables Multiplex, Label-Free Protein Detection by Aptamer and Aptamer-Protein Arrays Using Arrayed Imaging Reflectometry.

A Stable Biotin-Streptavidin Surface Enables Multiplex, Label-Free Protein Detection by Aptamer and Aptamer-Protein Arrays Using Arrayed Imaging Reflectometry.
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DOI:
10.3390/s20205745
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发表时间:
2020-10-10
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Miller BL
Miller BL
中科院分区:
其他
文献类型:
--
作者:
Klose AM;Miller BL

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虽然无标记的多路传感器技术原则上能够实现不同捕获分子的“混合和匹配”,但在实践中这很少(如果有的话)被证明。为了填补这一空白,我们开发了在阵列成像反射计(AIR)传感平台上使用链霉亲和素作为生物素化蛋白质和适体的共同附着点制备混合适体-蛋白质阵列的方案。这样做需要克服表面上干燥的链霉亲和素单层的不稳定性。在表征这种降解后,使用商业微阵列产品获得稳定的表面。然后通过稳定剂层进行微阵列,提供混合的适体-抗体阵列。我们证明了以这种方式制备的传感器阵列适用于几种探针(凝血酶和TGF-β1适体; avi标记的蛋白质)和靶标。
While label-free multiplex sensor technology enables “mixing and matching” of different capture molecules in principle, in practice this has been rarely (if ever) demonstrated. To fill this gap, we developed protocols for the preparation of mixed aptamer-protein arrays on the arrayed imaging reflectometry (AIR) sensing platform using streptavidin as a common attachment point for both biotinylated proteins and aptamers. Doing so required overcoming the noted instability of dried streptavidin monolayers on surfaces. After characterizing this degradation, stable surfaces were obtained using a commercial microarray product. Microarraying through the layer of stabilizer then provided mixed aptamer-antibody arrays. We demonstrate that sensor arrays prepared in this manner are suitable for several probes (thrombin and TGF-β1 aptamers; avi-tagged protein) and targets.
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