A rapid diagnosis of SARS-CoV-2 using DNA hydrogel formation on microfluidic pores.

A rapid diagnosis of SARS-CoV-2 using DNA hydrogel formation on microfluidic pores.
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DOI:
10.1016/j.bios.2021.113005
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发表时间:
2021-04-01
影响因子:
12.6
通讯作者:
Shin S
Shin S
中科院分区:
工程技术1区
文献类型:
--
作者:
Kim HS;Abbas N;Shin S

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2019冠状病毒病(COVID-19)疫情是2020年的重大公共卫生挑战。COVID-19的早期诊断是控制疾病传播和防止进一步死亡的最有效方法。因此,迫切需要一种高精度、快速且经济的测定方法。在此,我们提出了一种创新的方法来检测严重急性呼吸综合征冠状病毒2(SARS-CoV-2)使用等温扩增的核酸在含有多个微流控孔的网格。病原体DNA和固定化探针的杂交通过滚环扩增形成DNA水凝胶,并且因此阻塞孔以防止流体移动,如所观察到的。在优化了几个因素后,包括孔径大小、网格位置和精密微流体,SARS-CoV-2的检测限(LOD)在15分钟孵育时确定为0.7 aM。这些结果表明,通过远程护理点检测,在目标病原体的中等LOD下进行快速、简单和有效的检测,而不需要任何复杂的设备。
The coronavirus disease 2019 (COVID-19) pandemic has been a major public health challenge in 2020. Early diagnosis of COVID-19 is the most effective method to control disease spread and prevent further mortality. As such, a high-precision and rapid yet economic assay method is urgently required. Herein, we propose an innovative method to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) using isothermal amplification of nucleic acids on a mesh containing multiple microfluidic pores. Hybridization of pathogen DNA and immobilized probes forms a DNA hydrogel by rolling circle amplification and, consequently, blocks the pores to prevent fluid movement, as observed. Following optimization of several factors, including pore size, mesh location, and precision microfluidics, the limit of detection (LOD) for SARS-CoV-2 was determined to be 0.7 aM at 15-min incubation. These results indicate rapid, easy, and effective detection with a moderate-sized LOD of the target pathogen by remote point-of-care testing and without the requirement of any sophisticated device.
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