Document Detail

Immunogenicity of Plasmodium falciparum and Plasmodium vivax circumsporozoite protein repeat multiple antigen constructs (MAC).
MedLine Citation:
PMID:  9682348     Owner:  NLM     Status:  MEDLINE    
In this study we characterized the immunogenic properties of three different multispecies multiple antigen constructs (MACs) carrying the circumsporozoite protein (CSP) repeats of human malaria parasites, Plasmodium falciparum and P. vivax. We synthesized tetrameric MACs containing the antigenic repeats from the CSP of P. vivax-like parasite in two arms and CSP repeat sequences of either P. vivax type-1 (vivax-like/vivax type-1 MAC), P. vivax type-2 (vivax-like/vivax type-2 MAC), or P. falciparum (vivax-like/falciparum MAC) in the other two arms. Mice of four different genetic backgrounds (H-2a, H-2b, H-2d, and H-2k) were immunized with these MACs in Freund's adjuvant. All three MAC preparations were found to elicit antibodies to P. vivax-like CSP repeats in B10.BR, B10.A, and C57BL/6 mice. On the other hand, in B10.D2 mice only vivax-like/vivax type-1 MAC, but not the other two MACs induced antibodies to the P. vivax-like CSP repeats. In mice immunized with vivax-like/vivax type-1 MAC, antibodies to P. vivax type-1 CS repeat peptides were induced in B10.BR, B10.A, and C57BL/6 mice, but not in B10.D2 mice. Antibody responses to P. vivax type-2 repeats were not induced in any of the four strains of mice that were immunized with vivax-like/vivax type-2 MAC. While B10.BR, B10.A, and C57BL/6 mice produced antibodies to NANP repeats of P. falciparum CSP following immunization with vivax-like/falciparum MAC, B10.D2 mice failed to elicit antibodies to this repeat. All the sera that showed positive reactivity to peptides in enzyme-linked immunosorbent assay were found to react with sporozoites by IFA. In conclusion, these results showed that naturally immunogenic epitopes from different species of malaria parasites can be incorporated in a single vaccine construct to induce immune responses against multiple epitopes.
V Udhayakumar; A Saekhou; S Fang; D Jue; R M Wohlhueter; A A Lal
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Vaccine     Volume:  16     ISSN:  0264-410X     ISO Abbreviation:  Vaccine     Publication Date:    1998 May-Jun
Date Detail:
Created Date:  1998-10-09     Completed Date:  1998-10-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8406899     Medline TA:  Vaccine     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  982-8     Citation Subset:  IM    
Molecular Vaccine Section, Centers for Disease Control and Prevention, Atlanta, GA 30084, USA.
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MeSH Terms
Amino Acid Sequence
Antibodies, Protozoan / biosynthesis
Antigens, Protozoan / genetics*
Malaria Vaccines / genetics*,  immunology*
Mice, Inbred C57BL
Mice, Inbred Strains
Molecular Sequence Data
Plasmodium falciparum / genetics*,  growth & development,  immunology*
Plasmodium vivax / genetics*,  growth & development,  immunology*
Protozoan Proteins / genetics*,  immunology*
Recombinant Proteins / genetics,  immunology
Repetitive Sequences, Nucleic Acid
Vaccines, Synthetic / genetics*,  immunology*
Reg. No./Substance:
0/Antibodies, Protozoan; 0/Antigens, Protozoan; 0/Malaria Vaccines; 0/Protozoan Proteins; 0/Recombinant Proteins; 0/Vaccines, Synthetic; 0/circumsporozoite protein, Protozoan

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