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VIDE Oct 12 2020 FINAL.pdf (4.17 MB)
Detection of SARS-CoV-2 Viral Particles using Direct, Reagent-Free Electrochemical Sensing
Preprints are manuscripts made publicly available before they have been submitted for formal peer review and publication. They might contain new research findings or data. Preprints can be a draft or final version of an author's research but must not have been accepted for publication at the time of submission.
submitted on 16.10.2020, 17:23 and posted on 19.10.2020, 10:18by Hanie Yousefi, alam mahmud, Dingran Chang, Jagotamoy Das, Surath Gomis, Jenise B. Chen, Hansen Wang, Terek Been, Lily Yip, Eric Coomes, Zhijie Li, Samira Mubareka, Allison McGeer, Natasha Christie, Scott Gray-Owen, Alan Cochrane, James M. Rini, Edward H. Sargent, Shana
This manuscript describes a new method that enables direct analysis of viral particles in unprocessed samples.Using an electrochemical readout method that requires no external reagents, we detect the SARS-CoV-2 virus in the saliva of infected patients.The approach relies on a molecular sensor tethered to the surface of a gold electrode that contains an antibody, specific to the targetof interest, which here is the SARS-CoV-2 S1 spike protein that is displayed on the viral capsule. The antibody is attached to the electrode using a negatively charged linker that is composed of DNA. When a positive potential is applied to the electrode, the sensor complex is attracted to the electrode surface. The kinetics of transport is measured using chronoamperometry and readout is possible based on the absense or precense of virus and its effect on the complex movevment on electrode surface.