Publication: Are extensive T cell epitope polymorphisms in the Plasmodium falciparum circumsporozoite antigen, a leading sporozoite vaccine candidate, selected by immune pressure
Issued Date
2005-09-15
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ISSN
00221767
Other identifier(s)
2-s2.0-24744464566
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Immunology. Vol.175, No.6 (2005), 3935-3939
Suggested Citation
Chutima Kumkhaek, Kooruethai Phra-Ek, Laurent Rénia, Pratap Singhasivanon, Sornchai Looareesuwan, Chakrit Hirunpetcharat, Nicholas J. White, Alan Brockman, Anne Charlotte Grüner, Nicolas Lebrun, Ali Alloueche, François Nosten, Srisin Khusmith, Georges Snounou Are extensive T cell epitope polymorphisms in the Plasmodium falciparum circumsporozoite antigen, a leading sporozoite vaccine candidate, selected by immune pressure. Journal of Immunology. Vol.175, No.6 (2005), 3935-3939. doi:10.4049/jimmunol.175.6.3935 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/16553
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Title
Are extensive T cell epitope polymorphisms in the Plasmodium falciparum circumsporozoite antigen, a leading sporozoite vaccine candidate, selected by immune pressure
Abstract
Protective cellular immune responses depend on MHC presentation of pathogen-derived Ag fragments. MHC diversity renders this process sensitive to point mutations coding for altered amino acid sequence of the short target Ag-derived peptides epitopes. Thus, in a given host, a pathogen with an altered epitope sequence will be more likely to escape detection and elimination by the immune system. At a population level, selection by immune pressure will increase the likelihood of polymorphism in important pathogen antigenic epitopes. This mechanism of immune evasion is found in viruses and other pathogens. The detection of polymorphic hot spots in an Ag is often taken as a strong indication of its role in protective immunity. We provide evidence that polymorphisms in the T cell epitopes of a malaria vaccine candidate are unlikely to have been selected by immune pressure in the human host. Copyright © 2005 by The American Association of Immunologists, Inc.