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COVID ‐19 convalescent plasma cohort study: Evaluation of the association between both donor and recipient neutralizing antibody titers and patient outcomes
Author(s) -
Yokoyama Ana Paula H.,
Wendel Silvano,
BonetBub Carolina,
Fachini Roberta M.,
Dametto Ana Paula F.,
Blumm Fernando,
Dutra Valeria F.,
Candelaria Gabriela T. P.,
Sakashita Araci M.,
Machado Rafael Rahal Guaragna,
FontãoWendel Rita,
Hamerschlak Nelson,
Achkar Ruth,
Assunção Murillo Santucci Cesar,
Scuracchio Patrícia,
Nudelman Victor,
Pastore Laerte,
Pinho João R. R.,
Ben Mirian Dal,
Filho Roberto Kalil,
Marra Alexandre R.,
Amano Mariane T.,
Kallás Esper G.,
Helito Alfredo Salim,
Carvalho Carlos Roberto Ribeiro,
Araujo Danielle Bastos,
Durigon Edison Luiz,
Camargo Anamaria A.,
Rizzo Luiz V.,
Reis Luiz F. L.,
Kutner Jose M.
Publication year - 2021
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/trf.16573
Subject(s) - medicine , convalescent plasma , mechanical ventilation , titer , neutralizing antibody , intensive care unit , cohort , covid-19 , antibody , prospective cohort study , abo blood group system , immunology , disease , infectious disease (medical specialty)
Background Current evidence regarding COVID‐19 convalescent plasma (CCP) transfusion practices is limited and heterogeneous. We aimed to determine the impact of the use of CCP transfusion in patients with previous circulating neutralizing antibodies (nAbs) in COVID‐19. Methods Prospective cohort including 102 patients with COVID‐19 transfused with ABO compatible CCP on days 0–2 after enrollment. Clinical status of patients was assessed using the adapted World Health Organization (WHO) ordinal scale on days 0, 5, and 14. The nAbs titration was performed using the cytopathic effect‐based virus neutralization test with SARS‐CoV‐2 (GenBank MT126808.1). The primary outcome was clinical improvement on day 14, defined as a reduction of at least two points on the adapted WHO ordinal scale. Secondary outcomes were the number of intensive care unit (ICU)‐free days and the number of invasive mechanical ventilation‐free days. Results Both nAbs of CCP units transfused ( p < 0.001) and nAbs of patients before CCP transfusions ( p = 0.028) were associated with clinical improvements by day 14. No significant associations between nAbs of patients or CCP units transfused were observed in the number of ICU or mechanical ventilation‐free days. Administration of CCP units after 10 days of symptom onset resulted in a decrease in ICU‐free days ( p < 0.001) and mechanical ventilation‐free days ( p < 0.001). Conclusion Transfusion of high titer nAbs CCP units may be a determinant in clinical strategies against COVID‐19. We consider these data as useful parameters to guide future CCP transfusion practices.