Visual detection of microRNAs using gold nanorod-based lateral flow nucleic acid biosensor and exonuclease III-assisted signal amplification

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2024-07-27 DOI:10.1007/s00604-024-06557-0

Jing Zhang, Chao Yan, Guodong Liu

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Abstract

An ultrasensitive method for the visual detection of microRNAs (miRNAs) in cell lysates using a gold nanorod-based lateral flow nucleic acid biosensor (GN-LFNAB) and exonuclease III (Exo III)-assisted signal amplification. The Exo III-catalyzed target recycling strategy is employed to generate a large number of single-strand DNA products, which can be detected by GN-LFNAB visually. With the implementation of a unique recycling strategy, we have demonstrated that the miRNA in the concentration as low as 0.5 pM can be detected without the need for instrumentation, providing a detection limit that surpasses previous reports. The new biosensor is ultrasensitive and can be applied to the reliable monitoring of miRNAs in cell lysates with high accuracy. The approach offers a simple and rapid tool for cancer diagnosis and clinical biomedicine, thanks to its flexibility, simplicity, cost-effectiveness, and convenience. This new method has the potential to significantly improve the detection and monitoring of cancer biomarkers, ultimately contributing to more effective cancer diagnosis and treatment.

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利用基于金纳米棒的横向流核酸生物传感器和外切酶 III 辅助信号放大技术，对 microRNA 进行可视化检测

利用基于金纳米棒的横向流核酸生物传感器（GN-LFNAB）和外切酶 III（Exo III）辅助信号放大技术，建立了一种超灵敏的细胞裂解物中 microRNA（miRNA）的可视检测方法。Exo III 催化的目标再循环策略可生成大量单链 DNA 产物，GN-LFNAB 可以直观地检测到这些产物。通过实施独特的回收策略，我们证明了无需仪器就能检测到浓度低至 0.5 pM 的 miRNA，检测限超过了之前的报道。这种新型生物传感器具有超灵敏度，可用于可靠、高精度地监测细胞裂解液中的 miRNA。这种方法灵活、简单、经济、方便，为癌症诊断和临床生物医学提供了一种简单、快速的工具。这种新方法有可能大大改善癌症生物标志物的检测和监测，最终有助于更有效地诊断和治疗癌症。

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.