ArticleMolecular therapy. Methods & clinical development2024
mRNA vaccines encoding membrane-anchored RBDs of SARS-CoV-2 mutants induce strong humoral responses and can overcome immune imprinting.
Article in Molecular therapy. Methods & clinical development, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Age-related differences in mRNA vaccine immunogenicity and adjuvancy.Immunology and cell biology · 2026Article
- Targeting a malaria merozoite surface protein with mRNA vaccine generates multifunctional antibodies.Frontiers in immunology · 2026Article
- Structuring of lipid nanoparticle mRNA formulations at acidic and neutral pH: X-ray scattering and molecular dynamics studies.Molecular therapy. Methods & clinical development · 2025Article
- IL-1β drives SARS-CoV-2-induced disease independently of the inflammasome and pyroptosis signalling.Cell death and differentiation · 2025Article
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26 authors.
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Abstract
We investigated mRNA vaccines encoding a membrane-anchored receptor-binding domain (RBD), each a fusion of a variant RBD, the transmembrane (TM) and cytoplasmic tail fragments of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein. In naive mice, RBD-TM mRNA vaccines against SARS-CoV-2 variants induced strong humoral responses against the target RBD. Multiplex surrogate viral neutralization (sVNT) assays revealed broad neutralizing activity against a range of variant RBDs. In the setting of a heterologous boost, against the background of exposure to ancestral whole-spike vaccines, sVNT studies suggested that BA.1 and BA.5 RBD-TM vaccines had the potential to overcome the detrimental effects of immune imprinting. A subsequent heterologous boost study using XBB.1.5 booster vaccines was evaluated using both sVNT and authentic virus neutralization. Geometric mean XBB.1.5 neutralization values after third-dose RBD-TM or whole-spike XBB.1.5 booster vaccines were compared with those after a third dose of ancestral spike booster vaccine. Fold-improvement over ancestral vaccine was just 1.3 for the whole-spike XBB.1.5 vaccine, similar to data published using human serum samples. In contrast, the fold-improvement achieved by the RBD-TM XBB.1.5 vaccine was 16.3, indicating that the RBD-TM vaccine induced the production of antibodies that neutralize the XBB.1.5 variant despite previous exposure to ancestral spike protein.
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