ArticleInternational journal of nanomedicine2025
Comparative Evaluation of Three Nanoparticle Vaccines Targeting the Prefusion F Protein of Respiratory Syncytial Virus: Immunogenicity and Protective Efficacy.
Article in International journal of nanomedicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- I53-50: Engineered icosahedral protein cage for modular vaccine nanoplatform.Journal of microbiology (Seoul, Korea) · 2026Review
- Nanodrug Delivery Systems for Lower Respiratory Infections: Pulmonary Targeting, Anti-Infective Applications, and Translational Challenges.International journal of nanomedicine · 2026Review
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: To evaluate the immunogenic potential of three different nanoparticle (NP) platforms for respiratory syncytial virus (RSV) prefusion (pre-F) protein vaccines. Methods: Three NP platforms-24-mer ferritin (Fe), 60-mer lumazine synthase (LuS), and 120-subunit I53-50-were engineered to display RSV pre-F trimers (DS2) via SpyTag-SpyCatcher (ST-SC) conjugation (DS2-Fe, DS2-LuS) or direct genetic fusion (DS2-I53-50). The assembled particles were characterized using size-exclusion chromatography (SEC), SDS-PAGE, electron microscopy (EM), and dynamic light scattering (DLS). Antigenicity was evaluated using enzyme-linked immunosorbent assay (ELISA) and surface plasmon resonance (SPR) with prefusion-specific neutralizing antibodies. Immunogenicity and protective efficacy were evaluated in BALB/c mice following a prime-boost immunization, with analyses of humoral and cellular immune responses as well as post-challenge protection. Results: All three NP platforms successfully displayed the DS2 antigen while preserving its prefusion conformation. Notably, DS2-I53-50 demonstrated superior assembly quality and particle homogeneity relative to DS2-Fe and DS2-LuS. Compared to soluble DS2, all three DS2-NPs exhibited enhanced binding affinity (7- to 12-fold increase) to prefusion-specific antibodies (D25, AM14). In vivo, all DS2-NPs elicited higher levels of RSV-specific neutralizing antibodies and induced a more balanced Th1/Th2 immune response, with DS2-I53-50 generating significantly greater neutralizing antibody titers (1.7- to 2.4-fold increase) against both prototype RSV strains (LONG, 18537) and circulating genotypes (ON1, BA9). Immune cell profiling further revealed that all three DS2-NPs enhanced germinal center formation, facilitated follicular dendritic cell recruitment, and expanded memory T cell populations. Following RSV challenge, all DS2-NPs vaccines conferred significant protection, evidenced by accelerated weight recovery, reduced lung viral loads, and mitigated pulmonary pathology. Among them, DS2-I53-50 provided the most robust protection, achieving a 3.7-log reduction in viral titers and minimal lung pathology. Conclusion: NP platforms significantly enhanced the immunogenicity of RSV DS2 antigens, with DS2-I53-50 eliciting the strongest immune responses and protective efficacy. These findings underscore the potential of rationally designed NP-based vaccines for RSV.
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