Ultrasensitive and visual detection of SARS-CoV-2 using all-in-one dual CRISPR-Cas12a assay.

Ultrasensitive and visual detection of SARS-CoV-2 using all-in-one dual CRISPR-Cas12a assay.
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DOI:
10.1038/s41467-020-18575-6
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发表时间:
2020-09-18
影响因子:
16.6
通讯作者:
Liu C
Liu C
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Ding X;Yin K;Li Z;Lalla RV;Ballesteros E;Sfeir MM;Liu C

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近期导致新冠肺炎(COVID - 19)的新型冠状病毒(SARS - CoV - 2)在全球迅速传播。对SARS - CoV - 2进行快速早期检测有助于早期干预并防止疾病传播。在此,我们提出了一种一体化双重CRISPR - Cas12a(AIOD - CRISPR)检测方法,用于单管、超灵敏且可视化的SARS - CoV - 2检测。通过靶向SARS - CoV - 2的核蛋白基因,引入两种不受前间区序列邻近基序(PAM)位点限制的CRISPR RNA来开发AIOD - CRISPR检测方法,并能检测到几个拷贝的核酸,灵敏度极高。我们使用新冠肺炎临床拭子样本对该检测方法进行了验证,结果与逆转录聚合酶链式反应(RT - PCR)检测一致。此外,我们使用一个低成本的暖手宝(约0.3美元)作为AIOD - CRISPR检测的恒温器,在20分钟内检测临床样本,从而实现了在即时检测点无需仪器的可视化SARS - CoV - 2检测。因此,我们的方法具有为SARS - CoV - 2提供一种快速、灵敏、单管即时检测方法的巨大潜力。 对SARS - CoV - 2进行快速早期检测将有助于采取干预措施阻止疾病传播。在此,作者介绍了一种基于CRISPR的单管快速检测系统,该系统具有可视化读数。
The recent outbreak of novel coronavirus (SARS-CoV-2) causing COVID-19 disease spreads rapidly in the world. Rapid and early detection of SARS-CoV-2 facilitates early intervention and prevents the disease spread. Here, we present an All-In-One Dual CRISPR-Cas12a (AIOD-CRISPR) assay for one-pot, ultrasensitive, and visual SARS-CoV-2 detection. By targeting SARS-CoV-2’s nucleoprotein gene, two CRISPR RNAs without protospacer adjacent motif (PAM) site limitation are introduced to develop the AIOD-CRISPR assay and detect the nucleic acids with a sensitivity of few copies. We validate the assay by using COVID-19 clinical swab samples and obtain consistent results with RT-PCR assay. Furthermore, a low-cost hand warmer (~$0.3) is used as an incubator of the AIOD-CRISPR assay to detect clinical samples within 20 min, enabling an instrument-free, visual SARS-CoV-2 detection at the point of care. Thus, our method has the significant potential to provide a rapid, sensitive, one-pot point-of-care assay for SARS-CoV-2. Rapid and early detection of SARS-CoV-2 will aid intervention to stop disease spread. Here the authors present a one-pot CRISPR-based rapid detection system with visual readout.
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