Timing of SARS-CoV-2 vaccination during the third trimester of pregnancy and transplacental antibody transfer : a prospective cohort study

Copyright © 2021 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved..

OBJECTIVE: We aimed to assess the impact of early versus late third-trimester maternal severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination on transplacental transfer and neonatal levels of SARS-CoV-2 antibodies.

METHODS: Maternal and cord blood sera were collected following term delivery after antenatal SARS-CoV-2 BNT162b2 mRNA vaccination, with the first vaccine dose administered between 27 and 36 weeks of gestation. SARS-CoV-2 spike protein (S) and receptor-binding domain (RBD) -specific, IgG levels and neutralizing potency were evaluated in maternal and cord blood samples.

RESULTS: The study cohort consisted of 171 parturients-median age 31 years (interquartile range (IQR) 27-35 years); median gestational age 39+5 weeks (IQR 38+5-40+4 weeks)-83 (48.5%) were immunized in early thrird-trimester (first dose at 27-31 weeks) and 88 (51.5%) were immunized in late third trimester (first dose at 32-36 weeks). All mother-infant paired sera were positive for anti S- and anti-RBD-specific IgG. Anti-RBD-specific IgG concentrations in neonatal sera were higher following early versus late third-trimester vaccination (median 9620 AU/mL (IQR 5131-15332 AU/mL) versus 6697 AU/mL (IQR 3157-14731 AU/mL), p 0.02), and were positively correlated with increasing time since vaccination (r = 0.26; p 0.001). Median antibody placental transfer ratios were increased following early versus late third-trimester immunization (anti-S ratio: 1.3 (IQR 1.1-1.6) versus 0.9 (IQR 0.6-1.1); anti-RBD-specific ratio: 2.3 (IQR 1.7-3.0) versus 0.7 (IQR 0.5-1.2), p < 0.001). Neutralizing antibodies placental transfer ratio was greater following early versus late third-trimester immunization (median 1.9 (IQR 1.7-2.5) versus 0.8 (IQR 0.5-1.1), p < 0.001), and was positively associated with longer duration from vaccination (r = 0.77; p < 0.001).

CONCLUSIONS: Early compared with late third-trimester maternal SARS-CoV-2 immunization enhanced transplacental antibody transfer and increased neonatal neutralizing antibody levels. Our findings highlight that vaccination of pregnant women early in the third trimester may enhance neonatal seroprotection.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:28

Enthalten in:

Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases - 28(2022), 3 vom: 01. März, Seite 419-425

Sprache:

Englisch

Beteiligte Personen:

Rottenstreich, Amihai [VerfasserIn]
Zarbiv, Gila [VerfasserIn]
Oiknine-Djian, Esther [VerfasserIn]
Vorontsov, Olesya [VerfasserIn]
Zigron, Roy [VerfasserIn]
Kleinstern, Geffen [VerfasserIn]
Wolf, Dana G [VerfasserIn]
Porat, Shay [VerfasserIn]

Links:

Volltext

Themen:

Antibodies, Viral
BNT162 Vaccine
COVID-19 Vaccines
Cord blood
Coronavirus disease 2019
Immunoglobulin G
Journal Article
N38TVC63NU
Passive immunity
Pregnancy
Serology
Severe acute respiratory syndrome coronavirus 2
Spike Glycoprotein, Coronavirus
Spike protein, SARS-CoV-2
Vaccination

Anmerkungen:

Date Completed 15.03.2022

Date Revised 07.02.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.cmi.2021.10.003

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM332788385