Streamlined inactivation, amplification, and Cas13-based detection of SARS-CoV-2.

Nature Communications
Jon Arizti-SanzCameron Myhrvold

Abstract

The COVID-19 pandemic has highlighted that new diagnostic technologies are essential for controlling disease transmission. Here, we develop SHINE (Streamlined Highlighting of Infections to Navigate Epidemics), a sensitive and specific diagnostic tool that can detect SARS-CoV-2 RNA from unextracted samples. We identify the optimal conditions to allow RPA-based amplification and Cas13-based detection to occur in a single step, simplifying assay preparation and reducing run-time. We improve HUDSON to rapidly inactivate viruses in nasopharyngeal swabs and saliva in 10 min. SHINE's results can be visualized with an in-tube fluorescent readout - reducing contamination risk as amplification reaction tubes remain sealed - and interpreted by a companion smartphone application. We validate SHINE on 50 nasopharyngeal patient samples, demonstrating 90% sensitivity and 100% specificity compared to RT-qPCR with a sample-to-answer time of 50 min. SHINE has the potential to be used outside of hospitals and clinical laboratories, greatly enhancing diagnostic capabilities.

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Citations

Nov 22, 2020·Nature Communications·Jason QianMichael Springer
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Methods Mentioned

BETA
nucleic acid extraction
nucleic acid purification
Assay

Software Mentioned

Python
ADAPT
Adobe Illustrator
SHERLOCK
GISAID
seaborn
GraphPad
Prism
Biotek
SHERLOCK ( Specific High - sensitivity Enzymatic Reporter unLO...

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