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Synergistic malaria vaccine combinations identified by systematic antigen screening.

Published version
Peer-reviewed

Type

Article

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Authors

Bustamante, Leyla Y 
Powell, Gareth T 
Lin, Yen-Chun 
Macklin, Michael D 
Cross, Nadia 

Abstract

A highly effective vaccine would be a valuable weapon in the drive toward malaria elimination. No such vaccine currently exists, and only a handful of the hundreds of potential candidates in the parasite genome have been evaluated. In this study, we systematically evaluated 29 antigens likely to be involved in erythrocyte invasion, an essential developmental stage during which the malaria parasite is vulnerable to antibody-mediated inhibition. Testing antigens alone and in combination identified several strain-transcending targets that had synergistic combinatorial effects in vitro, while studies in an endemic population revealed that combinations of the same antigens were associated with protection from febrile malaria. Video microscopy established that the most effective combinations targeted multiple discrete stages of invasion, suggesting a mechanistic explanation for synergy. Overall, this study both identifies specific antigen combinations for high-priority clinical testing and establishes a generalizable approach that is more likely to produce effective vaccines.

Description

Keywords

Plasmodium falciparum, antigen combinations, erythrocyte invasion, malaria, vaccine, Antibodies, Protozoan, Antigens, Protozoan, Cell Line, Erythrocytes, HEK293 Cells, Humans, Malaria Vaccines, Malaria, Falciparum, Plasmodium falciparum, Prospective Studies, Protozoan Proteins

Journal Title

Proc Natl Acad Sci U S A

Conference Name

Journal ISSN

0027-8424
1091-6490

Volume Title

114

Publisher

Proceedings of the National Academy of Sciences

Rights

Publisher's own licence