Plasmodium falciparum VAR2CSA-specific IgG subclass responses reflect protection against low birth weight and pregnancy-associated malaria
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- Plasmodium falciparum VAR2CSA-Specific IgG Subclass Responses Reflect Protection Against Low Birth Weight and Pregnancy-Associated Malaria
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Sequestration of Plasmodium falciparum-infected erythrocytes expressing the VAR2CSA antigen in the placenta results in poor pregnancy outcomes, including low birth weight and maternal anemia. Antigen-specific antibody-mediated immunity is acquired during successive pregnancies. Thus, evaluating VAR2CSA-specific IgG profiles among pregnant women will increase knowledge on the immunological mechanisms associated with protection, and help in the development of VAR2CSA-based placental malaria vaccines. Using the PAMVAC candidate vaccine antigen, we assessed anti-VAR2CSA IgG subclass responses of a cohort of pregnant Beninese, and analyzed their relationships with pregnancy outcomes. Cytophilic IgG1 and IgG3 responses were the most frequent, with prevalences ranging from 28% (IgG3) up to 50% (IgG1). Elevated levels of VAR2CSA-specific total IgG and cytophilic IgG3 during pregnancy were consistently associated with higher birth weights, whilst high levels of IgG4 were associated with a reduced risk of placental infections. This suggests that protective anti-VAR2CSA IgG responses are coordinated between both cytophilic and non-cytophilic antibodies.
Original language | English |
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Article number | 610305 |
Journal | Frontiers in Immunology |
Volume | 12 |
Number of pages | 8 |
ISSN | 1664-3224 |
DOIs | |
Publication status | Published - 2021 |
Bibliographical note
Copyright © 2021 Tornyigah, d’Almeida, Escriou, Viwami, Fievet, Luty, Massougbodji, Nielsen, Deloron and Tuikue Ndam.
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