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- W1988778489 abstract "The circumsporozoite protein is a predominant surface antigen present on Plasmodium sporozoites. In Plasmodium falciparum circumsporozoite protein (PfCSP), two cysteine residues (396 and 401) are present adjacent to two overlapping cytotoxic T-lymphocyte epitopes of the protein and are involved in the formation of disulfide bridges. We investigated the role of these cysteines on the cellular and antibody responses towards the CS protein because disruption of disulfide linkages and the presence of cysteine residues in the flanking region of an epitope has been shown to significantly alter the immune responses to various proteins. Mice were immunized with variant forms of PfCSP DNA vaccine plasmids where these cysteine residues were individually mutated to alanine. The plasmid vaccines induced antigen specific antibody and cytotoxic T lymphocyte responses. While no alterations of cysteine influenced the CTL responses to P. falciparum CS protein, vaccine pVRCS4, containing an altered cysteine at position 401, dramatically improved the antibody response to the carboxyl-terminal region of the protein. This work indicates that sequence alterations of genes in an anti-malarial vaccine could enhance the response towards the native protein. Given the fact that long term natural immunity to the pathogen has not been documented, it may be important to challenge the immune system with non-native proteins." @default.
- W1988778489 created "2016-06-24" @default.
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- W1988778489 date "2001-11-01" @default.
- W1988778489 modified "2023-10-18" @default.
- W1988778489 title "Disruption of disulfide linkages of the Plasmodium falciparum circumsporozoite protein: effects on cytotoxic and antibody responses in mice" @default.
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- W1988778489 doi "https://doi.org/10.1016/s0166-6851(01)00369-3" @default.
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- W1988778489 hasPublicationYear "2001" @default.
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