Journal
MICROBES AND INFECTION
Volume 11, Issue 1, Pages 83-91Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micinf.2008.10.009
Keywords
Malaria; Vaccine; Synthetic peptide; Recombinant chimera
Categories
Funding
- US National Institutes of Health
- NIAID [R01-AI052371, R01-AI064766]
- Yerkes National Primate Research Center Base [RR00165]
- National Center for Research Resources of the National Institutes of Health
- NATIONAL CENTER FOR RESEARCH RESOURCES [P51RR000165] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [R01AI064766, R01AI052371] Funding Source: NIH RePORTER
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Synthetic linear peptide chimeras (LPCscys +) show promise as delivery platforms for malaria subunit vaccines. Maximal immune response to LPCscys + in rodent malaria models depends upon formation of cross-linkages to generate homopolymers, presenting challenges for vaccine production. To replicate the immunogenicity of LPCscys + using a recombinant approach, we designed a recombinant LPC (rLPC) based on Plasmodium yoelii circumsporozoite protein-specific sequences of 208 amino acids consisting of four LPC subunits in series. BALB/c or CAF1/J mice were immunized with synthetic or recombinant LPCs. Antibody concentrations, cytokine production and protection against challenge were compared. Recombinant peptide replicated the robust, high avidity antibody responses obtained with the synthetic linear peptide chimera. After in vitro stimulation spleen cells from mice immunized with rLPC or synthetic LPCcys + produced gamma interferon and IL-4 suggesting the efficient priming of T cells. Immunization of mice with either recombinant or synthetic LPCcys+ provided comparable protection against experimental challenge with P. yoelii sporozoites. Recombinant LPCs reproduced the immunogenicity of synthetic LPCcys + without requiring polymerization, improving prospects for use as malaria, vaccines. (c) 2008 Elsevier Masson SAS. All rights reserved.
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