Liposomal Co-Entrapment of CD40mAb Induces Enhanced IgG Responses against Bacterial Polysaccharide and Protein CD40 Liposome Vaccines
Author Information
Author(s): Hatzifoti Caterina, Bacon Andrew, Marriott Helen, Laing Peter, Heath Andrew W.
Primary Institution: Adjuvantix Ltd, Sheffield, United Kingdom
Hypothesis
Can co-encapsulation of CD40 antibody and antigens in liposomal vehicles enhance immune responses to vaccines?
Conclusion
Liposomal co-encapsulation with CD40 antibody may represent a practical means of producing more immunogenic multivalent vaccines and inducing IgG responses against polysaccharides without the need for conjugation.
Supporting Evidence
- Co-entrapped CD40 antibody enhanced antibody responses against both polysaccharide and protein antigens.
- Liposomal encapsulation reduced the toxicity of high doses of CD40 antibody.
- Significant enhancement in responses to Tetanus toxoid was observed with co-entrapped CD40 antibody.
- High entrapment efficiencies for all antibody materials were achieved.
- Responses to polysaccharide antigens were significantly improved with CD40 antibody co-encapsulation.
Takeaway
This study shows that putting a special antibody inside tiny bubbles called liposomes can help vaccines work better and make our bodies fight off germs more effectively.
Methodology
Mice were immunized with liposomal preparations containing CD40 antibody and antigens, and immune responses were measured by ELISA.
Potential Biases
Potential conflicts of interest due to authors' affiliations with companies involved in the study.
Limitations
The study did not compare the liposomal method with existing human vaccination methods, and the immunogenicity of different antigens varied.
Participant Demographics
BALB/c female mice, aged 8–10 weeks.
Statistical Information
P-Value
p=0.0011
Confidence Interval
95% CI limits
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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