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Deprecated: Implicit conversion from float 298.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Commun+Biol 2021 ; 4 (1): 486 Nephropedia Template TP
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Sensitive detection of SARS-CoV-2 seroconversion by flow cytometry reveals the presence of nucleoprotein-reactive antibodies in unexposed individuals #MMPMID33879833
Egia-Mendikute L; Bosch A; Prieto-Fernandez E; Lee SY; Jimenez-Lasheras B; Garcia Del Rio A; Antonana-Vildosola A; Bruzzone C; Bizkarguenaga M; Embade N; Gil-Redondo R; Martinez-Chantar ML; Lopez-Hoyos M; Abrescia NGA; Mato JM; Millet O; Palazon A
Commun Biol 2021[Apr]; 4 (1): 486 PMID33879833show ga
There is an ongoing need of developing sensitive and specific methods for the determination of SARS-CoV-2 seroconversion. For this purpose, we have developed a multiplexed flow cytometric bead array (C19BA) that allows the identification of IgG and IgM antibodies against three immunogenic proteins simultaneously: the spike receptor-binding domain (RBD), the spike protein subunit 1 (S1) and the nucleoprotein (N). Using different cohorts of samples collected before and after the pandemic, we show that this assay is more sensitive than ELISAs performed in our laboratory. The combination of three viral antigens allows for the interrogation of full seroconversion. Importantly, we have detected N-reactive antibodies in COVID-19-negative individuals. Here we present an immunoassay that can be easily implemented and has superior potential to detect low antibody titers compared to current gold standard serology methods.