Short report: differential evolution of immunoglobulin G1/G3 antibody responses to Plasmodium falciparum MSP1(19) over time in malaria-immune adult Senegalese patients.
This study examined the evolution of immunoglobulin (Ig) G1 and IgG3 antibodies against the asexual stage Plasmodium falciparum protein, MSP1(19), before and after a heavy malaria transmission period in clinically immune Senegalese subjects living under different epidemiological conditions. Plasma was tested for antibodies to a yeast-produced, recombinant PfMSP1(19) antigen (the Q-KNG allelic variant) that has previously been demonstrated to react with IgG1, IgG3, or both in the majority of these people. Anti-P. falciparum antibodies of the IgG1 and IgG3 subclasses, previously reported to be associated with protection, were shown to evolve independently one from another after the transmission period in both settings. These results suggest differential regulation of MSP1(19)-specific IgG1 and IgG3. The precise role of these antibody isotypes in maintaining malaria immunity remains to be determined.
Unité d'Immunologie, Institut Pasteur, Dakar, Senegal.
Tamsir O
TO
Diallo
Andre
A
Spiegel
Ababacar
A
Diouf
Laurence
L
Lochouarn
David C
DC
Kaslow
Adama
A
Tall
Ronald
R
Perraut
Olivier
O
Garraud
D000328:Adult; D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood*; D019353:Endemic Diseases; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood*; D016778:Malaria, Falciparum / Q000453:epidemiology / Q000276:immunology*; D008297:Male; D020066:Merozoite Surface Protein 1 / Q000276:immunology*; D010963:Plasmodium falciparum / Q000276:immunology*; D012621:Seasons; D012675:Senegal / Q000453:epidemiology
D000913:Antibodies, Protozoan; D007074:Immunoglobulin G; D020066:Merozoite Surface Protein 1