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Serum markers of B-cell activation in pregnancy during late gestation, delivery, and the postpartum period

Lima, J; Cambridge, G; Vilas-Boas, A; Martins, C; Borrego, L-M; Leandro, M; (2019) Serum markers of B-cell activation in pregnancy during late gestation, delivery, and the postpartum period. American Journal of Reproductive Immunology , 81 (3) , Article e13090. 10.1111/aji.13090. Green open access

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Abstract

Problem B cells are vital for the normal evolution of pregnancy due to their humoral and possible regulatory activities. Our group and others have documented that circulating B‐cell subsets undergo changes from normal late pregnancy to the postpartum period. However, the underlying mechanisms are poorly understood. Therefore, this study examined the degree of B‐cell activation in normal pregnancy by analyzing the levels of serum markers in healthy pregnant women during the third trimester of pregnancy, the day of delivery, and the postpartum period. Method of study A prospective study including pregnant and non‐pregnant women attending routine care was undertaken at a hospital clinic. Sociodemographic and clinical data were collected, along with peripheral blood samples. The serum levels of soluble CD23 (sCD23), B‐cell‐activating factor (BAFF), kappa (κ) and lambda (λ) free light chains (FLC), IgA, IgG, and IgM were quantified. Results Our study included 43 third trimester pregnant and 35 non‐pregnant women. In the pregnant women, the median levels of sCD23, BAFF, IgG, and κ FLC were significantly higher during the postpartum period than during the third trimester of pregnancy. Compared to the non‐pregnant women, the third trimester pregnant women had higher median BAFF levels and lower sCD23, IgA, IgG, and FLC levels. Conclusion Changes in serum markers of B‐cell kinetics that occur during pregnancy often persist into the postpartum period and affect the secretion of immunoglobulins from different classes. Further studies are needed to clarify the biological significance of our observations.

Type: Article
Title: Serum markers of B-cell activation in pregnancy during late gestation, delivery, and the postpartum period
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/aji.13090
Publisher version: https://doi.org/10.1111/aji.13090
Language: English
Additional information: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/
Keywords: B lymphocytes, B‐cell‐activating factor, biomarkers, female, free light chains, immunoglobulins, pregnancy, soluble CD23
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Medicine > Inflammation
URI: https://discovery.ucl.ac.uk/id/eprint/10072458
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