Shankara Narayanan Varadarajan

Dr. Shankara Narayanan Varadarajan


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 January 2018 in European Journal of Cell Biology
Verified
Journal Article
Closed access
DIDeepa Indira
Deepa Indira
SVShankara Narayanan Varadarajan
Shankara Narayanan Varadarajan
SLSanthik Subhasingh Lupitha
Santhik Subhasingh Lupitha
ALAsha Lekshmi
Asha Lekshmi
KMKrupa Ann Mathew
Krupa Ann Mathew
SRSanthoshkumar T R
Santhoshkumar T R

17 March 2022 in Antibody Therapeutics
Verified
Journal Article
Open access
PDF file
SLSanthik Subhasingh Lupitha
Santhik Subhasingh Lupitha
PDPramod Darvin
Pramod Darvin
ACAneesh Chandrasekharan
Aneesh Chandrasekharan
SVShankara Narayanan Varadarajan
Shankara Narayanan Varadarajan
SDSOUMYA JAYA DIVAKARAN
SOUMYA JAYA DIVAKARAN
SRSanthoshkumar T R
Santhoshkumar T R
Quantitative determination of neutralizing antibodies against Severe Acute Respiratory Syndrome Corona Virus-2 (SARS-CoV-2) is paramount in immunodiagnostics, vaccine efficacy testing, and immune response profiling among the vaccinated population. Cost-effective, rapid, easy-to-perform assays are essential to support the vaccine development process and immunosurveillance studies. We describe a bead-based screening assay for S1-neutralization using recombinant fluorescent proteins of hACE2 and SARS-CoV2-S1, immobilized on solid beads employing nanobodies/metal-affinity tags. Nanobody-mediated capture of SARS-CoV-2-Spike (S1) on agarose beads served as the trap for soluble recombinant ACE2-GFPSpark, inhibited by neutralizing antibody. The first approach demonstrates single-color fluorescent imaging of ACE2-GFPSpark binding to His-tagged S1-Receptor Binding Domain (RBD-His) immobilized beads. The second approach is dual-color imaging of soluble ACE2-GFPSpark to S1-Orange Fluorescent Protein (S1-OFPSpark) beads. Both methods showed a good correlation with the gold standard pseudovirion assay and can be adapted to any fluorescent platforms for screening.