Frontiers in Immunology (Jun 2021)

Immunogenicity of COVID-19 Tozinameran Vaccination in Patients on Chronic Dialysis

  • Eva Schrezenmeier,
  • Eva Schrezenmeier,
  • Leon Bergfeld,
  • Leon Bergfeld,
  • Leon Bergfeld,
  • David Hillus,
  • Joerg-Detlev Lippert,
  • Ulrike Weber,
  • Pinkus Tober-Lau,
  • Irmgard Landgraf,
  • Tatjana Schwarz,
  • Tatjana Schwarz,
  • Tatjana Schwarz,
  • Kai Kappert,
  • Kai Kappert,
  • Ana-Luisa Stefanski,
  • Arne Sattler,
  • Katja Kotsch,
  • Thomas Dörner,
  • Leif Erik Sander,
  • Klemens Budde,
  • Fabian Halleck,
  • Florian Kurth,
  • Florian Kurth,
  • Victor Max Corman,
  • Victor Max Corman,
  • Victor Max Corman,
  • Mira Choi

DOI
https://doi.org/10.3389/fimmu.2021.690698
Journal volume & issue
Vol. 12

Abstract

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Patients with kidney failure have notoriously weak responses to common vaccines. Thus, immunogenicity of novel SARS-CoV-2 vaccines might be impaired in this group. To determine immunogenicity of SARS-CoV-2 vaccination in patients with chronic dialysis, we analyzed the humoral and T-cell response after two doses of mRNA vaccine Tozinameran (BNT162b2 BioNTech/Pfizer). This observational study included 43 patients on dialysis before vaccination with two doses of Tozinameran 21 days apart. Overall, 36 patients completed the observation period until three weeks after the second dose and 32 patients were further analyzed at week 10. Serum samples were analyzed by SARS-CoV-2 specific IgG and IgA antibodies ~1, ~3–4 and ~10 weeks after the second vaccination. In addition, SARS-CoV-2-specific T-cell responses were assessed at ~3–4 weeks by an interferon-gamma release assay (IGRA). Antibody and T cell outcomes at this timepoint were compared to a group of 44 elderly patients not on dialysis, after immunization with Tozinameran. Median age of patients on chronic dialysis was 74.0 years (IQR 66.0, 82.0). The proportion of males was higher (69.4%) than females. Only 20/36 patients (55.6%, 95%CI: 38.29–71.67) developed SARS-CoV-2-IgG antibodies at the first sampling, whereas 32/36 patients (88.9%, 95%CI: 73.00–96.38) demonstrated IgG detection at the second sampling. In a longitudinal follow-up at ~10 weeks after the second dose, the proportion of dialysis patients reactive for anti-SARS-CoV-2-IgG decreased to 27/32 (84.37%, 95%CI: 66.46–94.10) The proportion of anti-SARS-CoV-2 S1 IgA decreased from 33/36 (91.67%; 95%CI: 76.41–97.82) at weeks 3–4 down to 19/32 (59.38; 95%CI: 40.79–75.78). Compared to a cohort of vaccinees with similar age but not on chronic dialysis seroconversion rates and antibody titers were significantly lower. SARS-CoV-2-specific T-cell responses 3 weeks after second vaccination were detected in 21/31 vaccinated dialysis patients (67.7%, 95%CI: 48.53–82.68) compared to 42/44 (93.3%, 95%CI: 76.49–98.84) in controls of similar age. Patients on dialysis demonstrate a delayed, but robust immune response three to four weeks after the second dose, which indicates effective vaccination of this vulnerable group. However, the lower immunogenicity of Tozinameran in these patients needs further attention to develop potential countermeasures such as an additional booster vaccination.

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