Novel Plasmodium antigens identified via genome-based antibody screen induce protection associated with polyfunctional T cell responses

Schussek, Sophie, Trieu, Angela, Apte, Simon h., Sidney, John, Sette, Alessandro, and Doolan, Denise L. (2017) Novel Plasmodium antigens identified via genome-based antibody screen induce protection associated with polyfunctional T cell responses. Scientific Reports, 7. 15053.

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The development of vaccines against complex intracellular pathogens, such as Plasmodium spp., where protection is likely mediated by cellular immune responses, has proven elusive. The availability of whole genome, proteome and transcriptome data has the potential to advance rational vaccine development but yet there are no licensed vaccines against malaria based on antigens identified from genomic data. Here, we show that the Plasmodium yoelii orthologs of four Plasmodium falciparum proteins identified by an antibody-based genome-wide screening strategy induce a high degree of sterile infection-blocking protection against sporozoite challenge in a stringent rodent malaria model. Protection increased in multi-antigen formulations. Importantly, protection was highly correlated with the induction of multifunctional triple-positive T cells expressing high amounts of IFN-gamma, IL-2 and TNF. These data demonstrate that antigens identified by serological screening are targets of multifunctional cellular immune responses that correlate with protection. Our results provide experimental validation for the concept of rational vaccine design from genomic sequence data.

Item ID: 51619
Item Type: Article (Research - C1)
ISSN: 2045-2322
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Funders: University of Queensland (UQ), Australian Centre for Vaccine Development (ACVD), National Health and Medical Research Council (NHMRC), National Institutes of Health (NIH), National Institute of Allergy and Infectious Diseases (NIH NIAID)
Projects and Grants: UQ International Research tuition Award, NHMRC Principal Research Fellowship, NHMRC Program Grant #1037304, NIH NIAID contract HHSN272200900044C, NIH Grant U19AI118626
Date Deposited: 22 Nov 2017 07:50
FoR Codes: 42 HEALTH SCIENCES > 4206 Public health > 420605 Preventative health care @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3204 Immunology > 320404 Cellular immunology @ 25%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3204 Immunology > 320405 Humoural immunology and immunochemistry @ 25%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920109 Infectious Diseases @ 100%
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