Production of the subdomains of the Plasmodium falciparum apical membrane antigen 1 ectodomain and analysis of the immune response.
The apical membrane antigen 1 of Plasmodium falciparum is one of the leading candidate antigens being developed as a vaccine to prevent malaria. This merozoite transmembrane protein has an ectodomain that can be divided into three subdomains (D I, D II, and D III). We have previously expressed a major portion of this ectodomain and have shown that it can induce antibodies that prevent merozoite invasion into red blood cells in an in vitro growth and invasion assay. To analyze the antibody responses directed against the individual subdomains, we constructed six different genes that express each of the domains separately (D I, D II, or D III) or in combination with another domain (D I+II, D II+III, or D I+III). These proteins were purified and used to immunize rabbits to raise construct-specific antibodies. We demonstrated that D I+II induced a significant amount of the growth-inhibitory antibodies active in the growth and invasion assay.
Lalitha
P V
PV
Department of Immunology, Walter Reed Army Institute of Research, 503 Robert Grant Ave., Silver Spring, MD 20910-7500, USA.
Ware
Lisa A
LA
Barbosa
Arnoldo
A
Dutta
Sheetij
S
Moch
J Kathleen
JK
Haynes
J David
JD
Fileta
Bader B
BB
White
Charles E
CE
Lanar
David E
DE
D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood* / Q000276:immunology; D000953:Antigens, Protozoan / Q000737:chemistry* / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D004912:Erythrocytes / Q000469:parasitology; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D007114:Immunization; D017780:Malaria Vaccines / Q000008:administration & dosage / Q000276:immunology; D016778:Malaria, Falciparum / Q000517:prevention & control; D008565:Membrane Proteins / Q000737:chemistry* / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D010963:Plasmodium falciparum / Q000737:chemistry / Q000254:growth & development / Q000276:immunology* / Q000472:pathogenicity*; D015800:Protozoan Proteins / Q000737:chemistry* / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D011817:Rabbits; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism
D000913:Antibodies, Protozoan; D000953:Antigens, Protozoan; D017780:Malaria Vaccines; D008565:Membrane Proteins; D015800:Protozoan Proteins; D011994:Recombinant Proteins; C090077:apical membrane antigen I, Plasmodium