Squalane-based emulsion vaccine delivery system: composition with murabutide activate Th1 response |
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| Authors: | Ravi Kantipakala Srinivasa Reddy Bonam Sravanthi Vemireddy Sreekanth Miryala |
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| Affiliation: | 1. Vaccine Immunology Laboratory, NPC Division, CSIR — Indian Institute of Chemical Technology, Hyderabad, India;2. Academy of Scientific and Innovative Research CSIR???Indian Institute of Chemical Technology, Hyderabad, India |
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| Abstract: | Emulsions play an important role in present-day subunit vaccine delivery. Squalane-based emulsion was formulated using surfactants viz., Pluronic F68, Span 85 along with Murabutide (MB) as immunepotentiator. Particle size and zetapotential of the final optimized emulsion was found to be 134?nm and ?13?mV, respectively. The in vitro cellular uptake studies performed using fluorescein isothiocyanate (FITC)-labeled ovalbumin (OVA) clearly revealed the rapid uptake of antigen in the presence of emulsion. The in vivo subcutaneous studies involving measurement of OVA-specific IgG antibody titers, Th1/Th2 cytokines were performed and a marked up regulation in IL-2, IL-12 and IFN-γ cytokines indicate Th1 immune response. Results supported that the squalane-based delivery system enhanced the uptake of the antigen by immune cells and elicited humoral as well as cell-mediated immune response in mice. These results indicate the promising application of the new squalane based oil-in-water (O/W) emulsion as capable vaccine delivery system useful for vaccine development. |
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| Keywords: | Squalane vaccine delivery antigen uptake IgG Th1/Th2 cytokines |
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