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Published on: April 16, 2016
Development of a Handheld Nano-centrifugal Device for Visual Virus Detection
Zi-Rong Bi1,2, Meng-Lu Hu2, Yong-Zhong Jiang3
1South China Normal University-Panyu Central Hospital Joint Laboratory of Basic and Translational Medical Research, Guangzhou Panyu Central Hospital, Guangzhou, 511400 China.
Abstract:
Gold nanoparticles (AuNPs) colorimetric assays based on distance-dependent optical characteristics have been widely employed for bioanalysis. However, this assay is not effective for visually detecting low-concentration targets due to the faint color change. Here, we developed a handheld nano-centrifugal device which could separate the crosslinked and non-crosslinked AuNPs. Results showed that the handheld nano-centrifugal device could easily reach more than 6000 r/min within 10 s simply by stretching and tightening the coiled rope in an appropriate rhythm. Further, combined with the CRISPR/Cas12a nucleic acids recognition system, a field-deployable colorimetric platform termed handheld nano-centrifugal device assisted CRISPR/Cas12a (Hand-CRISPR) has been validated. Moreover, clinical diagnostics applications for Epstein-Barr virus (EBV) and severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) detection with high sensitivity and accuracy (100% consistency with reverse transcription quantitative real-time polymerase chain reaction (RT-qPCR) test results) have been demonstrated. Overall, the Hand-CRISPR platform showed great promise in point-of-care-test (POCT) application, expected to become a powerful supplement to the standard nucleic acid testing method in remote or poverty-stricken areas.
Supplementary Information:
The online version contains supplementary material available at 10.1007/s41664-022-00232-0.
