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Nanoassembly routes stimulate conflicting antibody quantity and quality for transmission-blocking malaria vaccines
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Nanoassembly routes stimulate conflicting antibody quantity and quality for transmission-blocking malaria vaccines
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Nanoassembly routes stimulate conflicting antibody quantity and quality for transmission-blocking malaria vaccines
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Journal Article
Nanoassembly routes stimulate conflicting antibody quantity and quality for transmission-blocking malaria vaccines
2017
Overview
Vaccine development efforts have recently focused on enabling strong immune responses to poorly immunogenic antigens, via display on multimerisation scaffolds or virus like particles (VLPs). Typically such studies demonstrate improved antibody titer comparing monomeric and nano-arrayed antigen. There are many such studies and scaffold technologies, but minimal side-by-side evaluation of platforms for both the amount and efficacy of antibodies induced. Here we present direct comparison of three leading platforms displaying the promising malaria transmission-blocking vaccine (TBV) target Pfs25. These platforms encompass the three important routes to antigen-scaffold linkage: genetic fusion, chemical cross-linking and plug-and-display SpyTag/SpyCatcher conjugation. We demonstrate that chemically-conjugated Qβ VLPs elicited the highest
quantity
of antibodies, while SpyCatcher-AP205-VLPs elicited the highest
quality
anti-Pfs25 antibodies for transmission blocking upon mosquito feeding. These quantative and qualitative features will guide future nanoassembly optimisation, as well as the development of the new generation of malaria vaccines targeting transmission.
