Proteome-wide analysis of a malaria vaccine study reveals personalized humoral immune profiles in Tanzanian adults
Tanzanian adult male volunteers were immunized by direct venous inoculation with radiation-attenuated, aseptic, purified, cryopreserved Plasmodium falciparum (Pf) sporozoites (PfSPZ Vaccine) and protective efficacy assessed by homologous controlled human malaria infection (CHMI). Serum immunoglobulin G (IgG) responses were analyzed longitudinally using a Pf protein microarray covering 91% of the proteome, providing first insights into naturally acquired and PfSPZ Vaccine-induced whole parasite antibody profiles in malaria pre-exposed Africans. Immunoreactivity was identified against 2,239 functionally diverse Pf proteins, showing a wide breadth of humoral response. Antibody-based immune 'fingerprints' in these individuals indicated a strong person-specific immune response at baseline, with little changes in the overall humoral immunoreactivity pattern measured after immunization. The moderate increase in immunogenicity following immunization and the extensive and variable breadth of humoral immune response observed in the volunteers at baseline suggest that pre-exposure reduces vaccine-induced antigen reactivity in unanticipated ways.
All data analyzed during this study are included in the manuscript and supporting files, or sited accordingly when published elsewhere
Article and author information
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PP00P3_170702)
- Melissa A Penny
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
- Urszula Krzych, Walter Reed Army Institute of Research, United States
- Received: October 26, 2019
- Accepted: July 10, 2020
- Accepted Manuscript published: July 14, 2020 (version 1)
- Version of Record published: July 28, 2020 (version 2)
© 2020, Camponovo et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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