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SARS-CoV-2 proteins

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    Functionalized TiO2 nanotube-based Electrochemical Biosensor for Rapid Detection of SARS-CoV-2

    Authors: Bhaskar Sravan Vadlamani; Timsy Uppal; Subhash C Verma; Manoranjan Misra

    doi:10.1101/2020.09.07.20190173 Date: 2020-09-09 Source: medRxiv

    The coronavirus disease ( COVID-19 MESHD) is a newly emerging viral disease MESHD caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Rapid increase in the number of COVID-19 MESHD cases worldwide led the WHO declare pandemic within a few month after the first case of infection. Due to the lack of a prophylactic measure to control the virus infection MESHD and spread, early diagnosis and quarantining of infected as well as the asymptomatic individuals are necessary for the containment of this pandemic. However, the current methods for SARS-CoV-2 diagnosis are expensive and time consuming although some promising and inexpensive technologies are coming out for emergency use. In this work, we report the synthesis of a cheap yet highly sensitive cobalt-functionalized TiO2 nanotubes (Co-TNTs)-based electrochemical biosensor and its efficacy for rapid detection of spike glycoprotein PROTEIN of SARS-CoV-2 by examining S-RBD protein as the reference material. A simple, low-cost, and one-step electrochemical anodization route was used to synthesize TNTs, followed by an incipient wetting method for cobalt functionalization of the TNTs platform, which is connected to a potentiostat for data collection. The sensor specifically detected the S-RBD protein of SARS-CoV-2 even at very low concentration (range of 14 nM to 1400 nM). Additionally, our sensor showed linear response in the detection of viral protein with concentration. In summary, our Co- TNT HGNC sensor is highly effective in detecting SARS-CoV-2 S-RBD MESHD protein in approximately 30 seconds, which can be explored for developing a point of care diagnostics for rapid detection of SARS-CoV-2 in nasal secretions or saliva samples.

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MeSH Disease
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