Impact of Omicron BA.1 infection on BA.4/5 immunity in transplant recipients

Copyright © 2022 American Society of Transplantation & American Society of Transplant Surgeons. Published by Elsevier Inc. All rights reserved..

Mutations in the spike protein of SARS-CoV-2 have allowed Omicron subvariants to escape neutralizing antibodies. The degree to which this occurs in transplant recipients is poorly understood. We measured BA.4/5 cross-neutralizing responses in 75 mostly vaccinated transplant recipients who recovered from BA.1 infection. Sera were collected at 1 and 6 months post-BA.1 infection, and a lentivirus pseudovirus neutralization assay was performed using spike constructs corresponding to BA.1 and BA.4/5. Uninfected immunized transplant recipients and health care worker controls were used for comparison. Following BA.1 infection, the proportion of transplant recipients with neutralizing antibody responses was 88.0% (66/75) against BA.1 and 69.3% (52/75) against BA.4/5 (P = .005). The neutralization level against BA.4/5 was approximately 17-fold lower than that against BA.1 (IQR 10.6- to 45.1-fold lower, P < .0001). BA.4/5 responses declined over time and by ≥0.5 log10 (approximately 3-fold) in almost half of the patients by 6 months. BA.4/5-neutralizing antibody titers in transplant recipients with breakthrough BA.1 infection were similar to those in immunized health care workers but significantly lower than those in uninfected triple-vaccinated transplant recipients. These results provide evidence that transplant recipients are at ongoing risk for BA.4/5 infection despite vaccination and prior Omicron strain infection, and additional mitigation strategies may be required to prevent severe disease in this cohort.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:23

Enthalten in:

American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons - 23(2023), 2 vom: 15. Feb., Seite 278-283

Sprache:

Englisch

Beteiligte Personen:

Ferreira, Victor H [VerfasserIn]
Hu, Queenie [VerfasserIn]
Kurtesi, Alexandra [VerfasserIn]
Solera, Javier T [VerfasserIn]
Ierullo, Matthew [VerfasserIn]
Gingras, Anne-Claude [VerfasserIn]
Kumar, Deepali [VerfasserIn]
Humar, Atul [VerfasserIn]

Links:

Volltext

Themen:

Antibodies, Neutralizing
Antibodies, Viral
Clinical research/practice
Complication: infectious, infection, and infectious agents – viral: SARS-CoV-2/COVID-19
Infectious disease
Journal Article
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 23.02.2023

Date Revised 03.04.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.ajt.2022.10.004

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM352546107