Clinical Report: Evaluation of HRSV Pre-F Protein with Various Adjuvants

Overview

This study evaluates the protective efficacy of the human respiratory syncytial virus (HRSV) prefusion protein (Pre-F) in BALB/c mice using different adjuvants.

Background

Human respiratory syncytial virus (HRSV) is a significant cause of respiratory infections, particularly in infants and the elderly. The development of effective vaccines is crucial due to the high morbidity and mortality associated with HRSV infections. Understanding the efficacy of various adjuvants in enhancing vaccine responses is essential for improving HRSV vaccine formulations.

Data Highlights

Key Findings

• Mice immunized with Pre-F+BFA03 had the highest neutralizing antibody titre (1716).
• The Pre-F+AlOH group exhibited the most severe lung pathological injury (score: 2.83).
• Pre-F+AlOH had the highest viral load in the lung (Ct value: 32.2).
• Pre-F+AlOH+CpG provided similar protection to BFA03 with less pathological damage (score: 2.16).
• AlOH adjuvant induced a Th2-biased humoral immune response compared to BFA03.

Clinical Implications

The study discusses the selection of appropriate adjuvants for HRSV vaccine development.

Conclusion

The findings indicate that certain adjuvant combinations with HRSV Pre-F protein can improve vaccine efficacy in mouse models.

Related Resources & Content

1. Author(s)/Org, Source, Year -- Evaluation of a strain Long human respiratory syncytial virus with M2–2 gene deletion in intranasally vaccinated BALB/c mice
2. Author(s)/Org, Source, Year -- A Novel Unadjuvanted Subunit Respiratory Syncytial Virus Prefusion F Vaccine Induces Potent and Differentiated Functional Immune Responses Compared to AS01-Adjuvanted Arexvy in Older Adults
3. Frontiers in Immunology — Long-term protective potency of AAV vector-based SARS-CoV-2 prophylaxis in mice and non-human primates
4. The Journal of Infectious Diseases — Respiratory Syncytial Virus Humoral Antibody Responses in Older Adults After Vaccination or Infection
5. RSV Vaccine Guidance for Adults | RSV | CDC
6. Respiratory Syncytial Virus Prefusion F Protein Vaccine in Older Adults | New England Journal of Medicine
7. Package Insert - AREXVY