PMID: 7517517Apr 1, 1994Paper

Analysis of the high molecular weight rhoptry complex of Plasmodium falciparum using monoclonal antibodies

Parasitology
J C DouryO Mercereau-Puijalon

Abstract

Twenty-one monoclonal antibodies, obtained after immunization of mice with erythrocytic stages of Plasmodium falciparum, produced a double dot image in IFA. Immunoelectronmicroscopy indicated that the mAbs reacted with the rhoptries. Rhoptries are pear-shaped apical organelles, believed to be involved in invasion of the host cell by the parasite. The mAbs all immunoprecipitated the high molecular weight antigen complex. Some mAbs recognized on immunoblots only 1 protein of this complex, whereas others reacted with RhopH1 and RhopH3, or RhopH2 and RhopH3 or with the 3 proteins. An additional antigen of 52 kDa was also recognized by some of the mAbs. The epitopes defined by the mAbs were present in most of the 40 P. falciparum strains or isolates studied by IFA. Interestingly, the mAbs also reacted with high titres on P. vivax and P. ovale, but produced images that did not indicate an apical location. The mAbs failed to react on the non-human malaria parasites studied, P. cynomolgi and P. inui. On P. berghei or P. chabaudi parasites, only 5 mAbs gave a positive reaction, labelling a large network outside the parasite. Finally, the mAbs did not react with P. falciparum sporozoites, indicating that the rhoptries of merozoites and s...Continue Reading

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Citations

Dec 31, 2003·Molecular and Biochemical Parasitology·Dirk GeysenThomas T Dolan
Jun 15, 2005·Molecular and Biochemical Parasitology·Osamu KanekoMotomi Torii
May 1, 1997·International Journal for Parasitology·M K Shaw
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Jun 29, 2007·Parasitology International·Osamu Kaneko
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Nov 10, 1998·Experimental Parasitology·R HienneJ C Doury
Feb 5, 2021·Frontiers in Cellular and Infection Microbiology·Daisuke ItoTakafumi Tsuboi

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