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- Title
COMPARISON OF FIVE COMMERCIAL ANTI-SARS-COV-2 TOTAL ANTIBODIES AND IgG IMMUNOASSAYS AFTER VACCINATION WITH BNT162B2 MRNA.
- Authors
Danese, Elisa; Montagnana, Martina; SaMagno, Gian Luca; Gelati, Matteo; Peserico, Denise; Pighi, Laura; De Nitto, Simone; Henry, Brandon M.; Porru, Stefano; Lippi, Giuseppe
- Abstract
Background: Since universal vaccinations represents the most effective strategy to mitigate coronavirus disease 2019 (COVID-19), baseline assessment and post-vaccine monitoring of anti-SARS-CoV-2 neutralizing antibodies are essential to vaccination programs. Therefore, this study aimed to compare data of five commercial anti-SARS-CoV-2 immunoassays after administration of an mRNA vaccine. Methods: Venous blood was collected from three healthcare workers, receiving a double (30 pg) dose of BNT162b2 mRNA Covid-19 vaccine (Comirnaty, Pfizer), on the day of the first vaccine dose and then at fixed intervals for the following 2 months. Anti-SARS-CoV-2 neutralizing antibody response was assayed with Roche Total Ig anti-RBD (receptor binding domain), DiaSorin TrimericS IgG (spike trimer), Beckman Coulter IgG anti-RBD, SNIBE IgG anti-RBD and Technogenetics IgG anti-N/S1. Results: A total number of 45 samples were drawn at the end of the 2-month study period. The Spearman's correlations of absolute anti-SARS-CoV-2 antibodies were always excellent (all p<0.001), comprised between 0.967-0.994. Satisfactory results were also observed when absolute anti-SARS-CoV-2 antibodies values of the five methods were compared with the mean consensus value, with correlations always higher than 0.979 (all p<0.001). The agreement of anti-SARS-CoV-2 antibodies positivity versus the consensus median positivity ranged between 0.764 and 1.000 (always p<0.001), but become always >0.900 after readjustment of one assay cutoff. Conclusions: All the immunoassays evaluated in this study appear suitable for monitoring anti-SARS-CoV-2 neutralizing antibodies response in subjects undergoing mRNA COVID-19 vaccination.
- Subjects
BECKMAN Coulter Inc.; IMMUNOGLOBULIN G; MEDICAL personnel; COVID-19; IMMUNOASSAY; MESSENGER RNA
- Publication
Journal of Medical Biochemistry, 2021, Vol 40, Issue 4, p335
- ISSN
1452-8258
- Publication type
Article
- DOI
10.5937/jomb0-31475