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Folding Paper-Based Aptasensor Platform Coated with Novel Nanoassemblies for Instant and Highly Sensitive Detection of 17β-Estradiol.
ACS Sensors ( IF 8.2 ) Pub Date : 2019-12-11 , DOI: 10.1021/acssensors.9b01633
Tao Ming 1, 2 , Yang Wang 1, 2 , Jinping Luo 1, 2 , Juntao Liu 1, 2 , Shuai Sun 1, 2 , Yu Xing 1, 2 , Guihua Xiao 1, 2 , Hongyan Jin 3 , Xinxia Cai 1, 2
Affiliation  

Owing to its critical role in the development of female reproductive tissues and as a clinical biomarker, there is an urgent need to develop a rapid and cost-effective method to sensitively detect 17β-estradiol (E2). In this work, a folding aptasensor platform with microfluidic channels for the label-free electrochemical detection of E2 is described. The platform, designed with a delicate folding structure, integrating filter holes, microfluidic channels, reaction chambers, and a three-electrode system, is extremely easy to use. To increase the detection sensitivity and immobilize the aptamer, we synthesized a novel nanoassembly consisting of amine-functionalized single-walled carbon nanotube/new methylene blue/gold nanoparticles (AuNPs) and modified the working electrode with this nanoassembly. The calibration curve obtained from the experimental results exhibited a linear range between 10 pg mL-1 and 500 ng mL-1 (R2 = 0.993), and a detection limit of 5 pg mL-1 was achieved (S/N = 3). Furthermore, experiments to detect E2 in clinical serum were conducted, and the results were highly similar to those obtained using a large electrochemical luminescence apparatus. By integrating multiple functional components, adopting novel nanoassemblies, and using a folding structure, this paper-based platform not only has great potential as a simple and convenient integrated device for point-of-care testing of E2, but also as a portable, low-cost, and highly sensitive aptasensor platform capable of detecting many diagnostic biomarkers with the appropriate aptamers.

中文翻译:

折叠式纸质Aptasensor平台,涂层的新型纳米组件可用于即时和高度灵敏的17β-雌二醇检测。

由于其在女性生殖组织发育中的关键作用以及作为临床生物标记物,迫切需要开发一种快速且经济高效的方法来灵敏地检测17β-雌二醇(E2)。在这项工作中,描述了具有微流体通道的折叠适体传感器平台,用于E2的无标记电化学检测。该平台采用精致的折叠结构设计,集成了滤孔,微流体通道,反应室和三电极系统,非常易于使用。为了提高检测灵敏度并固定适体,我们合成了由胺官能化的单壁碳纳米管/新的亚甲基蓝/金纳米颗粒(AuNPs)组成的新型纳米组件,并用该纳米组件修饰了工作电极。从实验结果获得的校准曲线显示出10 pg mL-1和500 ng mL-1之间的线性范围(R2 = 0.993),并且达到了5 pg mL-1的检出限(S / N = 3)。此外,进行了检测临床血清中E2的实验,其结果与使用大型电化学发光设备获得的结果高度相似。通过集成多个功能组件,采用新颖的纳米组件并使用折叠结构,该基于纸张的平台不仅具有作为E2即时检验的简单便捷的集成设备的巨大潜力,而且还具有便携式,低成本的特点。低成本,高度灵敏的适体传感器平台,能够使用适当的适体来检测许多诊断性生物标志物。并达到了5 pg mL-1的检出限(S / N = 3)。此外,进行了检测临床血清中E2的实验,其结果与使用大型电化学发光设备获得的结果高度相似。通过集成多个功能组件,采用新颖的纳米组件并使用折叠结构,该基于纸张的平台不仅具有作为E2即时检验的简单便捷的集成设备的巨大潜力,而且还具有便携式,低成本的特点。低成本,高度灵敏的适体传感器平台,能够使用适当的适体来检测许多诊断性生物标志物。并达到了5 pg mL-1的检出限(S / N = 3)。此外,进行了检测临床血清中E2的实验,其结果与使用大型电化学发光设备获得的结果高度相似。通过集成多个功能组件,采用新颖的纳米组件并使用折叠结构,该基于纸张的平台不仅具有作为E2即时检验的简单便捷的集成设备的巨大潜力,而且还具有便携式,低成本的特点。低成本,高度灵敏的适体传感器平台,能够使用适当的适体来检测许多诊断性生物标志物。结果与使用大型电化学发光设备获得的结果高度相似。通过集成多个功能组件,采用新颖的纳米组件并使用折叠结构,该基于纸张的平台不仅具有作为E2即时检验的简单便捷的集成设备的巨大潜力,而且还具有便携式,低成本的特点。低成本,高度灵敏的适体传感器平台,能够使用适当的适体来检测许多诊断性生物标志物。结果与使用大型电化学发光设备获得的结果高度相似。通过集成多个功能组件,采用新颖的纳米组件并使用折叠结构,该基于纸张的平台不仅具有作为E2即时检验的简单便捷的集成设备的巨大潜力,而且还具有便携式,低成本的特点。低成本,高度灵敏的适体传感器平台,能够使用适当的适体来检测许多诊断性生物标志物。
更新日期:2019-12-11
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