Abstract
Background: Anti-SARS-CoV-2 S antibodies prevent viral replication. Critically ill COVID-19 patients show viral material in plasma, associated with a dysregulated host response. If these antibodies influence survival and viral dissemination in ICU-COVID patients is unknown. Patients/Methods: We studied the impact of anti-SARS-CoV-2 S antibodies levels on survival, viral RNA-load in plasma, and N-antigenaemia in 92 COVID-19 patients over ICU admission. Results: Frequency of N-antigenaemia was >2.5-fold higher in absence of antibodies. Antibodies correlated inversely with viral RNA-load in plasma, representing a protective factor against mortality (adjusted HR [CI 95%], p): (S IgM [AUC ≥ 60]: 0.44 [0.22; 0.88], 0.020); (S IgG [AUC ≥ 237]: 0.31 [0.16; 0.61], <0.001). Viral RNA-load in plasma and N-antigenaemia predicted increased mortality: (N1-viral load [≥2.156 copies/ml]: 2.25 [1.16; 4.36], 0.016); (N-antigenaemia: 2.45 [1.27; 4.69], 0.007). Conclusions: Low anti-SARS-CoV-2 S antibody levels predict mortality in critical COVID-19. Our findings support that these antibodies contribute to prevent systemic dissemination of SARS-CoV-2.
Original language | English |
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Pages (from-to) | 232-240 |
Number of pages | 9 |
Journal | Journal of Internal Medicine |
Volume | 291 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2022 |
Bibliographical note
Funding Information:We would like to thank the IBSAL and CIBER for administrative support to perform this study.
Funding Information:
This work was supported by awards from the Canadian Institutes of Health Research, (CIHR OV2 – 170357), Research Nova Scotia, Atlantic Genome/Genome Canada, Li‐Ka Shing Foundation, Dalhousie Medical Research Foundation (David J. Kelvin), David J. Kelvin is a recipient of the Canada Research Chair in Translational Vaccinology and Inflammation, and the “Subvenciones de concesión directa para proyectos y programas de investigación del virus SARS‐CoV2, causante del COVID‐19”, FONDO ‐ COVID19, Instituto de Salud Carlos III (COV20/00110, CIBERES, 06/06/0028), (Antoni Torres) and finally by the “Convocatoria extraordinaria y urgente de la Gerencia Regional de Salud de Castilla y León, para la financiación de proyectos de investigación en enfermedad COVID‐19” (GRS COVID 53/A/20) (CA). Ana P. Tedim was funded by the Sara Borrell Research Grant CD018/0123 funded by Instituto de Salud Carlos III and co‐financed by the European Development Regional Fund (A Way to Achieve Europe programme). The funding sources did not play any role neither in the design of the study and collection, not in the analysis, in the interpretation of data or in writing the manuscript.
Publisher Copyright:
© 2021 The Association for the Publication of the Journal of Internal Medicine
ASJC Scopus Subject Areas
- Internal Medicine
PubMed: MeSH publication types
- Journal Article
- Research Support, Non-U.S. Gov't