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Nat Med. 2019 Apr;25(4):591-596. doi: 10.1038/s41591-019-0392-8. Epub 2019 Mar 18.

The repertoire of maternal anti-viral antibodies in human newborns.

Author information

1
Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
2
Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.
3
Department of Newborn Medicine, Karolinska University Hospital, Stockholm, Sweden.
4
Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden. petter.brodin@ki.se.
5
Department of Newborn Medicine, Karolinska University Hospital, Stockholm, Sweden. petter.brodin@ki.se.

Abstract

All circulating immunoglobulin G (IgG) antibodies in human newborns are of maternal origin1 and transferred across the placenta to provide passive immunity until newborn IgG production takes over 15 weeks after birth2. However, maternal IgG can also negatively interfere with newborn vaccine responses3. The concentration of IgG increases sharply during the third trimester of gestation and children delivered extremely preterm are believed to largely lack this passive immunity1,2,4. Antibodies to individual viruses have been reported5-12, but the global repertoire of maternal IgG, its variation in children, and the epitopes targeted are poorly understood. Here, we assess antibodies against 93,904 epitopes from 206 viruses in 32 preterm and 46 term mother-child dyads. We find that extremely preterm children receive comparable repertoires of IgG as term children, albeit at lower absolute concentrations and consequent shorter half-life. Neutralization of the clinically important respiratory syncytial virus (RS-virus) was also comparable until three months of age. These findings have implications for understanding infectious disease susceptibility, vaccine development, and vaccine scheduling in newborn children.

PMID:
30886409
DOI:
10.1038/s41591-019-0392-8

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