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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Pinches, R. A. Roberts, D. J. Gardner, J. P. Newbold, C. I. |
| Description | Author Affiliation: Gardner JP ( Molecular Parasitology Group, Institue of Molecular Medicine, John Radcliffe Hospital, Oxford, England.); |
| Abstract | Parasite-derived proteins expressed on the surface of erythrocytes infected with Plasmodium falciparum are important virulence factors, since they mediate binding of infected cells to diverse receptors on vascular endothelium and are targets of a protective immune response. They are difficult to study because they undergo rapid clonal antigenic variation in vitro, which precludes the derivation of phenotypically homogeneous cultures. Here we have utilized sequence-specific proteases to dissect the role of defined antigenic variants in binding to particular receptors. By selection of protease-resistant subpopulations of parasites on defined receptors we (i) confirm the high rate of antigenic variation in vitro; (ii) demonstrate that a single infected erythrocyte can bind to intercellular adhesion molecule 1, CD36, and thrombospondin; (iii) show that binding to intercellular adhesion molecule 1 and CD36 are functions of the variant antigen; and (iv) suggest that binding to thrombospondin may be mediated by other components of the infected erythrocyte surface. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 93 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1996-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antigens, Protozoan Genetics Endothelium, Vascular Parasitology Plasmodium Falciparum Immunology Pathogenicity Animals Antigenic Variation Antigens, CD36 Metabolism Cell Adhesion Drug Effects Endopeptidases Pharmacology Erythrocyte Aggregation Erythrocytes In Vitro Techniques Intercellular Adhesion Molecule-1 Malaria, Falciparum Membrane Glycoproteins Models, Biological Phenotype Thrombospondins Virulence Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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