Allelic forms of pg195, a major blood-stage antigen of plasmodium falciparum, are expressed in liver stages
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Date
1988
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Experimental Medicine
Abstract
Mature exoerythrocytic (EE) forms of two cloned lines (3D7 and HB3) of Plasmodium falciparum were obtained in the livers of splenectomized chimpanzees. Sectioned preparations were examined by immunofluorescence (IFA) using mAbs that distinguished allelic variants of the blood-form antigen gp195 and mAbs that recognized multiple conserved epitopes of gp195. EE forms and blood schizonts exhibited identical IFA reactions for each respective clone, showing that the antigen was expressed identically in liver and blood-stage parasites. A third chimpanzee was infected with sporozoites derived from a mixture of 3D7 and HB3 gametocytes that had undergone cross-fertilization in the mosquitoes. IFAs on the EE forms in this animal showed that segregation of each gp195 allele had occurred earlier in the life cycle, providing evidence that the parasite is haploid for the whole of its mammalian development.
Description
Keywords
EMTREE drug terms: monoclonal antibody; parasite antigen, EMTREE medical terms: allele; animal cell; animal experiment; chimpanzee; cytochemistry; immunofluorescence; mammal; merozoite; nonhuman; plasmodium falciparum; protozoon; schizont; sporozoite; animal; article; biosynthesis; fluorescent antibody technique; gene expression regulation; genetics; genotype; growth, development and aging; immunology; liver; malaria; Pan troglodytes; parasitology; Plasmodium falciparum, MeSH: Alleles; Animal; Antigens, Protozoan; Fluorescent Antibody Technique; Gene Expression Regulation; Genotype; Liver; Malaria; Pan troglodytes; Plasmodium falciparum; Support, Non-U.S. Gov't; Support, U.S. Gov't, Non-P.H.S
Citation
Szarfman, A., Walliker, D., McBride, J. S., Lyon, J. A., Quakyi, I. A., & Carter, R. (1988). Allelic forms of pg195, a major blood-stage antigen of plasmodium falciparum, are expressed in liver stages. Journal of Experimental Medicine, 167(1), 231-236.