SERS-based dual-mode DNA aptasensors for rapid classification of SARS-CoV-2 and influenza A/H1N1 infection.

SERS-based dual-mode DNA aptasensors for rapid classification of SARS-CoV-2 and influenza A/H1N1 infection.
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DOI:
10.1016/j.snb.2021.131324
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发表时间:
2022-03-15
期刊:
Sensors and actuators. B, Chemical
影响因子:
--
通讯作者:
Choo J
Choo J
中科院分区:
其他
文献类型:
--
作者:
Chen H;Park SK;Joung Y;Kang T;Lee MK;Choo J

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我们研制了一种基于表面增强拉曼散射(SERS)的双模适体传感器,可以同时准确诊断和区分严重急性呼吸综合征冠状病毒2 (SARS-CoV-2)和甲型H1N1流感。本研究将选择性结合SARS-CoV-2和甲型H1N1流感病毒的DNA适体一起固定在金纳米玉米粒底物上。拉曼报告蛋白(Cy3和RRX)附着在DNA适体末端,可以在金纳米玉米底物的纳米间隙中产生强烈的SERS信号。此外,将内部标准拉曼报告蛋白(4-MBA)与适体dna一起固定在金纳米玉米底物上,以减少测量环境变化引起的误差。当SARS-CoV-2或甲型流感病毒接近金纳米玉米粒底物时,由于相应的DNA适体与病毒具有显著的结合亲和力,相应的DNA适体选择性地从底物上分离。因此,相关SERS强度随着靶病毒浓度的增加而降低。因此,使用基于sers的DNA适体传感器可以确定疑似患者是否感染了SARS-CoV-2或甲型流感。此外,该传感器能够以高灵敏度定量评估目标病毒浓度,而不受交叉反应性的影响。因此,这种基于sers的诊断平台被认为是一种概念上新的诊断工具,可以快速区分这两种呼吸系统疾病,防止其传播。
We developed a dual-mode surface-enhanced Raman scattering (SERS)-based aptasensor that can accurately diagnose and distinguish severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and influenza A/H1N1 at the same time. Herein, DNA aptamers that selectively bind to SARS-CoV-2 and influenza A/H1N1 were immobilized together on Au nanopopcorn substrate. Raman reporters (Cy3 and RRX), attached to the terminal of DNA aptamers, could generate strong SERS signals in the nanogap of the Au nanopopcorn substrate. Additionally, the internal standard Raman reporter (4-MBA) was immobilized on the Au nanopopcorn substrate along with aptamer DNAs to reduce errors caused by changes in the measurement environment. When SARS-CoV-2 or influenza A virus approaches the Au nanopopcorn substrate, the corresponding DNA aptamer selectively detaches from the substrate due to the significant binding affinity between the corresponding DNA aptamer and the virus. As a result, the related SERS intensity decreases with increasing target virus concentration. Thus, it is possible to determine whether a suspected patient is infected with SARS-CoV-2 or influenza A using this SERS-based DNA aptasensor. Furthermore, this sensor enables a quantitative evaluation of the target virus concentration with high sensitivity without being affected by cross-reactivity. Therefore, this SERS-based diagnostic platform is considered a conceptually new diagnostic tool that rapidly discriminates against these two respiratory diseases to prevent their spread.
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