title: Human monoclonal IgG selection of Plasmodium falciparum for the expression of placental malaria-specific variant surface antigens.
abstract: Pregnancy-associated Plasmodium falciparum malaria (PAM) is a major cause of morbidity and mortality in African women and their offspring. PAM is characterized by accumulation of infected erythrocytes (IEs) that adhere to chondroitin sulphate A (CSA) in the placental intervillous space. We show here that human monoclonal IgG antibodies with specificity for variant surface antigens (VSA) specifically expressed by CSA-adhering IEs (VSAPAM) can be used in vitro to select parasites from nonpregnant donors to express VSAPAM and that this selection for VSAPAM expression results in preferential transcription of var2csa. The results corroborate current efforts to develop PAM-specific vaccines based on VAR2CSA.
authors.affiliation: Centre for Medical Parasitology, Department of International Health, Immunology and Microbiology, University of Copenhagen Denmark.
authors.forename: J
authors.initials: J
authors.lastname: Soerli
authors.forename: L
authors.initials: L
authors.lastname: Barfod
authors.forename: T
authors.initials: T
authors.lastname: Lavstsen
authors.forename: N L
authors.initials: NL
authors.lastname: Bernasconi
authors.forename: A
authors.initials: A
authors.lastname: Lanzavecchia
authors.forename: L
authors.initials: L
authors.lastname: Hviid
mesh_terms: D000349:Africa; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000913:Antibodies, Protozoan / Q000276:immunology*; D000953:Antigens, Protozoan / Q000235:genetics* / Q000276:immunology*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology; D016778:Malaria, Falciparum / Q000469:parasitology*; D010963:Plasmodium falciparum / Q000276:immunology*; D012641:Selection, Genetic
chemical_list: D000911:Antibodies, Monoclonal; D000913:Antibodies, Protozoan; D000953:Antigens, Protozoan; D007074:Immunoglobulin G; C512601:VAR2CSA protein, Plasmodium falciparum