It has been necessary to use methods that can detect the specificity of a virus during virus screening. In this study, we use a dual platform to identify any spiked virus and specific SARS-CoV-2 antigen, sequentially. We introduce a natural bed-receptor surface as Microparticle Vesicle-Galactins1 (MV-gal1) with the ability of glycan binding to screen every spiked virus. MV are the native vesicles which may have the gal-1receptor. Gal-1 is the one of lectin receptor which can bind to glycan. After dropping the MV-gal1 on the SCPE/GNP, the sensor is turned on due to the increased electrochemical exchange with [Fe(CN) 6 ] -3/-4 probe. Dropping the viral particles of SARS-CoV-2 cause to turn off the sensor with covering the sugar bond (early screening). Then, with the addition of Au /Antibody-SARS-CoV-2 on the MV-gal1@ SARS-CoV-2 Antigen, the sensor is turned on again due to the electrochemical amplifier of AuNP (specific detection). As a result, our sensor has the capacity of screening of every spike virus, and the specific detection of covid-19 (LOD: 4.57 × 10 2 copies/mL) by using the natural bed-receptor and a specific antibody in the solid biosensor, for the first time.
Dual Electrochemical Sensing of Spiked Virus and SARS-CoV-2 Using Natural Bed-Receptor (MV-gal1)