title: Immunogold localization of circumsporozoite protein of the malaria parasite Plasmodium falciparum during sporogony in Anopheles stephensi midguts.
abstract: The occurrence of the circumsporozoite (CS) proteins of Plasmodium falciparum sporozoites was monitored during sporogonic development in Anopheles stephensi mosquitoes. Using a monoclonal anti-CS protein antibody (3Sp2) and immunogold labeling on ultrathin cryosections it was found that CS protein is synthesized in immature oocysts from day 6 onwards when there are not yet signs of sporozoite formation. The CS protein is rapidly incorporated in the oocyst plasmalemma, which subsequently invaginates into the parasite. In the oocyst only the external sporozoite membrane contains CS protein. The inner pellicle membranes, rhoptries and micronemes do not react with monoclonal antibody (MoAb) 3Sp2.
authors.affiliation: Department of Cell Biology, University of Utrecht Medical School, The Netherlands.
authors.forename: G
authors.initials: G
authors.lastname: Posthuma
authors.forename: J F
authors.initials: JF
authors.lastname: Meis
authors.forename: J P
authors.initials: JP
authors.lastname: Verhave
authors.forename: M R
authors.initials: MR
authors.lastname: Hollingdale
authors.forename: T
authors.initials: T
authors.lastname: Ponnudurai
authors.forename: J H
authors.initials: JH
authors.lastname: Meuwissen
authors.forename: H J
authors.initials: HJ
authors.lastname: Geuze
mesh_terms: D000818:Animals; D000852:Anopheles / Q000469:parasitology*; D000911:Antibodies, Monoclonal; D000953:Antigens, Protozoan / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis*; D007150:Immunohistochemistry; D008854:Microscopy, Electron / Q000379:methods; D010963:Plasmodium falciparum / Q000254:growth & development / Q000648:ultrastructure*; D015800:Protozoan Proteins
chemical_list: D000911:Antibodies, Monoclonal; D000953:Antigens, Protozoan; D000954:Antigens, Surface; D015800:Protozoan Proteins; C041595:circumsporozoite protein, Protozoan