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. 1991 Apr;84(1):122–128. doi: 10.1111/j.1365-2249.1991.tb08134.x

Studies on the humoral immune response to a synthetic vaccine against Plasmodium falciparum malaria.

M Salcedo 1, L Barreto 1, M Rojas 1, R Moya 1, J Cote 1, M E Patarroyo 1
PMCID: PMC1535363  PMID: 2015702

Abstract

A synthetic vaccine against the asexual blood stages of P. falciparum, the SPf 66 synthetic hybrid polymer, composed of peptides derived from three merozoite membrane proteins as well as one peptide from the sporozoite CS protein, has been developed by our group and tested in different protection assays in Aotus monkeys as well as in human volunteers. This study evaluates the humoral immune response induced by the SPf 66 protein vaccination in adult human volunteers from the Colombian Pacific coast as follows: determination of specific IgG antibody levels against SPf 66 by FAST-ELISA after each immunization; analysis of antibody reactivity with P. falciparum schizont lysates by immunoblots; and determination of the in vitro parasite growth inhibition. A clear boosting effect, dependent on time and dose, was observed in the antibody production kinetics. These antibodies also specifically recognize three proteins of the P. falciparum schizont lysate corresponding to the molecular weights of the proteins from which the amino acid sequence was derived. These sera were also capable of markedly inhibiting in vitro parasite growth.

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Selected References

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