Immunoglobulin G antibodies to merozoite surface antigens are associated with recovery from chloroquine-resistant Plasmodium falciparum in Gambian children.

Infection and Immunity
M PinderP J Milligan

Abstract

We examined the hypothesis that recovery from uncomplicated malaria in patients carrying drug-resistant Plasmodium falciparum is a measure of acquired functional immunity and may therefore be associated with humoral responses to candidate vaccine antigens. Gambian children with malaria were treated with chloroquine in 28-day trials, and recovery was defined primarily as the absence of severe clinical malaria at any time and absence of parasitemia with fever after 3 days. Plasma samples from these children were assayed by enzyme-linked immunosorbent assay for immunoglobulin G (IgG) to recombinant merozoite antigens: apical membrane antigen 1 (AMA-1) and the 19-kDa C-terminal region of merozoite surface protein 1 (MSP-1(19)), including antigenic variants of MSP-1(19) with double and triple substitutions. Antigen-specific IgG was more frequent in children who recovered, particularly that for MSP-1(19) (age-adjusted odds ratios: 0.32 [95% confidence interval, 0.05, 1.87; P = 0.168] for AMA-1, 0.19 [0.03, 1.11; P = 0.019] for recombinant MSP-1(19), 0.24 [0.04, 1.31; P = 0.032] for the recombinant MSP-1(19) double variant, and 0.18 [0.03, 0.97; P = 0.013] for the triple variant). IgG titers to MSP-1(19) and to the triple variant were...Continue Reading

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Citations

Jan 16, 2007·Clinical Microbiology Reviews·David J Conway
Feb 5, 2010·The Lancet Infectious Diseases·Stephen J RogersonSteven R Meshnick
Oct 19, 2006·Vaccine·Marc P GirardMarie Paule Kieny
Mar 16, 2017·Proceedings of the National Academy of Sciences of the United States of America·Ricardo AtaideFreya J I Fowkes
Apr 22, 2017·Malaria Journal·Katherine O'FlahertyFreya J I Fowkes

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