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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Sequential, ordered acquisition of antibodies to Plasmodium falciparum erythrocyte membrane protein 1 domains
Journal of Immunology, Volume 183, No. 5, Year 2009
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Description
The binding of erythrocytes infected with mature blood stage parasites to the vascular bed is key to the pathogenesis of malignant malaria. The binding is mediated by members of Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) family. PfEMP1s can be divided into groups, and it has previously been suggested that parasites expressing group A or B/A PfEMP1s are most pathogenic. To test the hypothesis that the first malaria infections in infants and young children are dominated by parasites expressing A and B/A PfEMP1s, we measured the plasma Ab level against 48 recombinant PfEMP1 domains of different groupings in 1342 individuals living in five African villages characterized by markedly different malaria transmission. We show that children progressively acquire a broader repertoire of anti-PfEMP1 Abs, but that the rate of expansion is governed by transmission intensity. However, independently of transmission intensity, Abs are first acquired to particular duffy binding ligand-like domains belonging to group A or B/A PfEMP1s. The results support the view that anti-PfEMP1 Ab responses effectively structure the expenditure of the repertoire of PfEMP1 maintained by the parasite. Parasites expressing certain group A and B/A PfEMP1s are responded to first by individuals with limited previous exposure, and the resulting Abs reduce the fitness and pathogenicity of these parasites during subsequent infections. This allows parasites expressing less pathogenic PFEMP1s to dominate during later infections. The identification of PfEMP1 domains expressed by parasites causing disease in infants and young children is important for development of vaccines protecting against severe malaria. Copyright © 2009 by The American Association of Immunologists, Inc.
Authors & Co-Authors
Cham, Gerald K.K.
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Turner, Louise
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Lusingu, John Peter Andrea
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Tanzania, Tanga
National Institute for Medical Research Tanga
Vestergaard, Lasse Skafte
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Mmbando, Bruno P.
Tanzania, Tanga
National Institute for Medical Research Tanga
Kurtis, Jonathan D.
United States, Providence
The Warren Alpert Medical School
Jensen, Anja Ramstedt
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Salanti, Ali
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Lavstsen, Thomas
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
G. Theander, Thor Grundtvig
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Copenhagen University Hospital
Statistics
Citations: 116
Authors: 10
Affiliations: 4
Identifiers
Doi:
10.4049/jimmunol.0901331
ISSN:
00221767
e-ISSN:
15506606
Research Areas
Cancer
Infectious Diseases
Maternal And Child Health