Accelerated Hybridization Chain Reaction Kinetics Using Poly DNA Tetrahedrons and Its Application in Detection of Aflatoxin B1

文献类型： 外文期刊

第一作者： Li, Xuesong

作者： Li, Xuesong;Zeng, Kun;Xiao, Jiaxuan;Lu, Yanyan;Zhu, Fang;Wu, Xiangyang;Zhang, Zhen;Cheng, Jie;Wei, Shulin;Wang, Zhanhui;Wang, Kun

作者机构：

关键词： Immunoassay; nanobody; signal amplification; rapid detection; aflatoxin B1; hybridizationchain reaction

期刊名称：ACS APPLIED MATERIALS & INTERFACES （ 影响因子：9.5； 五年影响因子：9.6 ）

ISSN： 1944-8244

年卷期： 2023 年 15 卷 35 期

页码：

收录情况： SCI

摘要： Traditional hybridization chain reaction (HCR) as a popular isothermal amplification technique shows some inevitable disadvantages in bioanalysis due to its relatively slow kinetics, which could be markedly promoted when the HCR initiator occurs under tension. Herein, a poly DNA tetrahedrons (pTDNs)-mediated HCR was successfully constructed to make its initiator in a stretched state by long-range electrostatic forces owing to the superimposed electrostatic interactions derived from the synthesized pTDNs, and it was hypothesized that it could remarkably enhance HCR performance, which was testified by theoretical simulations and experimental studies. Consequently, pTDNs-mediated HCR was applied to develop a novel immunoassay for rapid and sensitive detection of aflatoxin B1 as a proof-of-concept, and its signal amplification was attributed to the increased G(4) DNAzyme that loaded on the second antibody. Our work paves a promising way using simple DNA frameworks alone to heighten HCR kinetics for reaction speed improvement and signal amplification in bioanalysis.

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