Naturally Acquired Antibodies to Plasmodium vivax Duffy Binding Protein (DBP) in Rural Brazilian Amazon

Duffy binding protein (DBP), a leading malaria vaccine candidate, plays a critical role in Plasmodium vivax erythrocyte invasion. Sixty-eight of 366 (18.6%) subjects had IgG anti-DBP antibodies by enzyme-linked immunosorbent assay (ELISA) in a community-based cross-sectional survey in the Brazilian...

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Veröffentlicht in:The American journal of tropical medicine and hygiene 2010-02, Vol.82 (2), p.185-193
Hauptverfasser: Souza-Silva, Flavia A, Silva-Nunes, Monica da, Sanchez, Bruno A. M, Ceravolo, Isabela P, Malafronte, Rosely S, Brito, Cristiana F. A, Ferreira, Marcelo U, Carvalho, Luzia H
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container_issue 2
container_start_page 185
container_title The American journal of tropical medicine and hygiene
container_volume 82
creator Souza-Silva, Flavia A
Silva-Nunes, Monica da
Sanchez, Bruno A. M
Ceravolo, Isabela P
Malafronte, Rosely S
Brito, Cristiana F. A
Ferreira, Marcelo U
Carvalho, Luzia H
description Duffy binding protein (DBP), a leading malaria vaccine candidate, plays a critical role in Plasmodium vivax erythrocyte invasion. Sixty-eight of 366 (18.6%) subjects had IgG anti-DBP antibodies by enzyme-linked immunosorbent assay (ELISA) in a community-based cross-sectional survey in the Brazilian Amazon Basin. Despite continuous exposure to low-level malaria transmission, the overall seroprevalence decreased to 9.0% when the population was reexamined 12 months later. Antibodies from 16 of 50 (36.0%) subjects who were ELISA-positive at the baseline were able to inhibit erythrocyte binding to at least one of two DBP variants tested. Most (13 of 16) of these subjects still had inhibitory antibodies when reevaluated 12 months later. Cumulative exposure to malaria was the strongest predictor of DBP seropositivity identified by multiple logistic regression models in this population. The poor antibody recognition of DBP elicited by natural exposure to P. vivax in Amazonian populations represents a challenge to be addressed by vaccine development strategies.
doi_str_mv 10.4269/ajtmh.2010.08-0580
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subjects Biological and medical sciences
Infectious diseases
Medical sciences
title Naturally Acquired Antibodies to Plasmodium vivax Duffy Binding Protein (DBP) in Rural Brazilian Amazon
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