Enhancing antibody responses by multivalent antigen display on thymus-independent DNA origami scaffolds

Eike Christian Wamhoff, Larance Ronsard, Jared Feldman, Grant A. Knappe, Blake M. Hauser, Anna Romanov, James Brett Case, Shilpa Sanapala, Evan C. Lam, Kerri J.St Denis, Julie Boucau, Amy K. Barczak, Alejandro B. Balazs, Michael S. Diamond, Aaron G. Schmidt, Daniel Lingwood, Mark Bathe

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Protein-based virus-like particles (P-VLPs) are commonly used to spatially organize antigens and enhance humoral immunity through multivalent antigen display. However, P-VLPs are thymus-dependent antigens that are themselves immunogenic and can induce B cell responses that may neutralize the platform. Here, we investigate thymus-independent DNA origami as an alternative material for multivalent antigen display using the receptor binding domain (RBD) of the SARS-CoV-2 spike protein, the primary target of neutralizing antibody responses. Sequential immunization of mice with DNA-based VLPs (DNA-VLPs) elicits protective neutralizing antibodies to SARS-CoV-2 in a manner that depends on the valency of the antigen displayed and on T cell help. Importantly, the immune sera do not contain boosted, class-switched antibodies against the DNA scaffold, in contrast to P-VLPs that elicit strong B cell memory against both the target antigen and the scaffold. Thus, DNA-VLPs enhance target antigen immunogenicity without generating scaffold-directed immunity and thereby offer an important alternative material for particulate vaccine design.

Original languageEnglish
Article number795
JournalNature communications
Volume15
Issue number1
DOIs
StatePublished - Dec 2024

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