Microorganisms (May 2022)

Evaluation of the Kinetics of Antibody Response to COVID-19 Vaccine in Solid Organ Transplant Recipients: The Prospective Multicenter ORCHESTRA Cohort

  • Maddalena Giannella,
  • Elda Righi,
  • Renato Pascale,
  • Matteo Rinaldi,
  • Natascia Caroccia,
  • Chiara Gamberini,
  • Zaira R. Palacios-Baena,
  • Giulia Caponcello,
  • Maria Cristina Morelli,
  • Mariarosa Tamè,
  • Marco Busutti,
  • Giorgia Comai,
  • Luciano Potena,
  • Elena Salvaterra,
  • Giuseppe Feltrin,
  • Umberto Cillo,
  • Gino Gerosa,
  • Mara Cananzi,
  • Salvatore Piano,
  • Elisa Benetti,
  • Patrizia Burra,
  • Monica Loy,
  • Lucrezia Furian,
  • Gianluigi Zaza,
  • Francesco Onorati,
  • Amedeo Carraro,
  • Fiorella Gastaldon,
  • Maurizio Nordio,
  • Samir Kumar-Singh,
  • Mahsa Abedini,
  • Paolo Boffetta,
  • Jesús Rodríguez-Baño,
  • Tiziana Lazzarotto,
  • Pierluigi Viale,
  • Evelina Tacconelli,
  • on behalf of The ORCHESTRA Study Group Workpackage

DOI
https://doi.org/10.3390/microorganisms10051021
Journal volume & issue
Vol. 10, no. 5
p. 1021

Abstract

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Previous studies assessing the antibody response (AbR) to mRNA COVID-19 vaccines in solid organ transplant (SOT) recipients are limited by short follow-up, hampering the analysis of AbR kinetics. We present the ORCHESTRA SOT recipients cohort assessed for AbR at first dose (t0), second dose (t1), and within 3 ± 1 month (t2) after the first dose. We analyzed 1062 SOT patients (kidney, 63.7%; liver, 17.4%; heart, 16.7%; and lung, 2.5%) and 5045 health care workers (HCWs). The AbR rates in the SOTs and HCWs were 52.3% and 99.4%. The antibody levels were significantly higher in the HCWs than in the SOTs (p p p = 0.02) and a less pronounced decrease between 76 and 118 days (p = 0.04) in the HCWs. Upon multivariable analysis, liver transplant, ≥3 years from SOT, mRNA-1273, azathioprine, and longer time from t0 were associated with a positive AbR at t2. Older age, other comorbidities, mycophenolate, steroids, and impaired graft function were associated with lower AbR probability. Our results may be useful to optimize strategies of immune monitoring after COVID-19 vaccination and indications regarding timing for booster dosages calibrated on SOT patients’ characteristics.

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