Visual detection of microRNA with lateral flow nucleic acid biosensor.

Visual detection of microRNA with lateral flow nucleic acid biosensor.
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DOI:
10.1016/j.bios.2013.10.055
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发表时间:
2014-04-15
影响因子:
12.6
通讯作者:
Liu, Guodong
Liu, Guodong
中科院分区:
工程技术1区
文献类型:
--
作者:
Gao, Xuefei;Xu, Hui;Baloda, Meenu;Gurung, Anant S.;Xu, Li-Ping;Wang, Tao;Zhang, Xueji;Liu, Guodong

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我们报告了一种基于 DNA-金纳米粒子 (DNA-GNP) 的侧流核酸生物传感器,用于以低成本和短分析时间视觉检测水溶液和生物样品中的 microRNA (miRNA)-215。 GNP标记的DNA探针、miRNA-215和生物素修饰的DNA探针之间的夹心型杂交反应在侧流装置上进行。 GNP 在生物传感器测试区的积累使得 miRNA-215 的视觉检测成为可能。经过系统优化,生物传感器能够检测到最低浓度为 60 pM 的 miRNA-215。应用该生物传感器直接检测A549细胞裂解液中的miRNA-215,无需复杂的样品处理,获得了14.8万个细胞的检测限。该研究为水溶液和生物样品中的miRNA检测提供了一种简单、快速、特异且低成本的方法,在一些恶性疾病的临床应用和生物医学诊断方面显示出巨大的前景。
We report a DNA-gold nanoparticle (DNA-GNP) based lateral flow nucleic acid biosensor for visual detection of microRNA (miRNA)-215 in aqueous solutions and biological samples with low-cost and short analysis time. Sandwich-type hybridization reactions among GNP-labeled DNA probe, miRNA-215 and biotin-modified DNA probes were performed on the lateral flow device. The accumulation of GNPs on the test zone of the biosensor enables the visual detection of miRNA-215. After systematic optimization, the biosensor was able to detect a minimum concentration of 60 pM miRNA-215. The biosensor was applied to detect miRNA-215 from A549 cell lysate directly without complex sample treatment, and the detection limit of 0.148 million cells was obtained. This study provides a simple, rapid, specific and low-cost approach for miRNA detection in aqueous solutions and biological samples, showing great promise for clinical application and biomedical diagnosis in some malignant diseases.
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