In:
PLOS ONE, Public Library of Science (PLoS), Vol. 18, No. 1 ( 2023-1-24), p. e0279779-
Abstract:
Despite the worldwide campaigns of COVID-19 vaccinations, the pandemic is still a major medical and social problem. The Ortho VITROS SARS-CoV-2 spike-specific quantitative IgG (VITROS S-IgG) assay has been developed to assess neutralizing antibody (NT antibody) against SARS-CoV-2 spike (S) antibodies. However, it has not been evaluated in Japan, where the total cases and death toll are lower than the rest of the world. Methods The clinical performance of VITROS S-IgG was evaluated by comparing with the NT antibody levels measured by the surrogate virus neutralizing antibody test (sVNT). A total of 332 serum samples from 188 individuals were used. Of these, 219 samples were from 75 COVID-19 patients: 96 samples from 20 severe/critical cases (Group S), and 123 samples from 55 mild/moderate cases (Group M). The remaining 113 samples were from 113 healthcare workers who had received 2 doses of the BNT162b2 vaccine. Results VITROS S-IgG showed good correlation with the cPass sVNT assay (Spearman rho = 0.91). Both VITROS S-IgG and cPass sVNT showed significantly higher plateau levels of antibodies in Group S compared to Group M. Regarding the humoral immune responses after BNT162b2 vaccination, individuals who were negative for SARS-CoV-2 nucleocapsid (N)-specific antibodies had statistically lower titers of both S-IgG and sVNT compared to individuals with a history of COVID-19 and individuals who were positive for N-specific antibodies without history of COVID-19. In individuals who were positive for N-specific antibodies, S-IgG and sVNT titers were similar to individuals with a history of COVID-19. Conclusions Although the automated quantitative immunoassay VITROS S-IgG showed a reasonable correlation with sVNT antibodies, there is some discrepancy between Vitros S-IgG and cPass sVNT in milder cases. Thus, VITROS S-IgG can be a useful diagnostic tool in assessing the immune responses to vaccination and herd immunity. However, careful analysis is necessary to interpret the results.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0279779
DOI:
10.1371/journal.pone.0279779.g001
DOI:
10.1371/journal.pone.0279779.g002
DOI:
10.1371/journal.pone.0279779.g003
DOI:
10.1371/journal.pone.0279779.g004
DOI:
10.1371/journal.pone.0279779.g005
DOI:
10.1371/journal.pone.0279779.g006
DOI:
10.1371/journal.pone.0279779.t001
DOI:
10.1371/journal.pone.0279779.t002
DOI:
10.1371/journal.pone.0279779.t003
DOI:
10.1371/journal.pone.0279779.t004
DOI:
10.1371/journal.pone.0279779.s001
DOI:
10.1371/journal.pone.0279779.s002
DOI:
10.1371/journal.pone.0279779.r001
DOI:
10.1371/journal.pone.0279779.r002
DOI:
10.1371/journal.pone.0279779.r003
DOI:
10.1371/journal.pone.0279779.r004
DOI:
10.1371/journal.pone.0279779.r005
DOI:
10.1371/journal.pone.0279779.r006
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2023
detail.hit.zdb_id:
2267670-3
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