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Title: Natural Parasite Exposure Induces Protective Human Anti-Malarial Antibodies

Journal Article · · Immunity

Antibodies against the NANP repeat of circumsporozoite protein (CSP), the major surface antigen of Plasmodium falciparum (Pf) sporozoites, can protect from malaria in animal models but protective humoral immunity is difficult to induce in humans. Here we cloned and characterized rare affinity-matured human NANP-reactive memory B cell antibodies elicited by natural Pf exposure that potently inhibited parasite transmission and development in vivo. We unveiled the molecular details of antibody binding to two distinct protective epitopes within the NANP repeat. We report NANP repeat recognition was largely mediated by germline encoded and immunoglobulin (Ig) heavy-chain complementarity determining region 3 (HCDR3) residues, whereas affinity maturation contributed predominantly to stabilizing the antigen-binding site conformation. Combined, our findings illustrate the power of exploring human anti-CSP antibody responses to develop tools for malaria control in the mammalian and the mosquito vector and provide a molecular basis for the structure-based design of next-generation CSP malaria vaccines.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC); International Max Planck Research School for Infectious Diseases and Immunology (IMPRS-IDI); German National Academic Foundation; Canada Foundation for Innovation (CFI); Natural Sciences and Engineering Research Council of Canada (NSERC); University of Saskatchewan; Government of Saskatchewan; Western Economic Diversification Canada; National Research Council Canada (NRC); Canadian Institutes of Health Research (CIHR); National Institutes of Health (NIH)
Grant/Contract Number:
AC02-06CH11357; F32 AI 114113
OSTI ID:
1488319
Alternate ID(s):
OSTI ID: 1432855
Journal Information:
Immunity, Journal Name: Immunity Vol. 47 Journal Issue: 6; ISSN 1074-7613
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 93 works
Citation information provided by
Web of Science

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