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SARS-CoV-2 antibody responses in infection-naive or previously infected peritoneal dialysis patients after 2 doses of the BNT162b2 vaccine

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Resumo:ABSTRACT Dialysis-associated immune dysfunction makes chronic kidney disease patients both susceptible to severe Coronavirus disease 19 (Covid19) and to a weaker response to vaccination. Previously infected patients are thought to sustain stronger and more durable humoral responses than vaccinated patients. Four months after a two dose-regimen of the Pfizer/BioNTech SARS-CoV-2 mRNA vaccine (BNT162b2), we evaluated the SARS-CoV-2 spike immunoglobin G (IgG-S1) antibody levels in previously infected peritoneal dialysis patients and compared them with infection naïve PD patients. A total of 79 peritoneal dialysis patients were analyzed, of which 11 had a previous history of Covid19. We have verified that the median titer of the IgG-S1 in previously infected patients (14310 AU/mL) was significantly superior to that in infection naïve patients (760,05 AU/mL) (p < 0,001). Previous Covid19 was the only significant predictor of IgG-S1 levels in a multivariate linear regression model (p < 0,001). These results may impact vaccination strategies for peritoneal dialysis patients regarding the future administration of BNT162b2 booster doses. In conclusion, previously infected peritoneal dialysis patients who have completed a two-dose regimen of the BNT162b2 may be well suited without a third, booster dose for longer than infection naïve peritoneal dialysis patients. This strategy could make additional doses available around the world.
Autores principais:Silva,Rui
Outros Autores:Silva,Filipa; Mendonça,Luís; Pereira,Luciano; Oliveira,Ana; Ramos,Angélica; Cardoso,Maria João; Malheiro,Ana; Guimarães,João Tiago
Assunto:antibodies Covid-19 humoral immunity peritoneal dialysis vaccine
Ano:2022
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Fundação para a Ciência e Tecnologia
Idioma:inglês
Origem:SciELO Portugal

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