Multi-compartmental vaccine delivery system for enhanced immune response to gp100 peptide antigen in melanoma immunotherapy

Pharmaceutical Research
Mayurkumar KalariyaMansoor Amiji


To develop a multi-compartmental vaccine delivery system for safe and efficient delivery of the gp100 peptide antigen in melanoma immunotherapy. Water-in-oil-in-water (W/O/W) multiple emulsion-based multi-compartmental vaccine delivery system containing the gp100 peptide was prepared by a two-step emulsification method. In vivo prophylactic and active immunization effectiveness of the novel squalane oil-containing gp100 vaccine was evaluated in the murine B16 melanoma model and compared with that of an incomplete Freund's adjuvant (IFA)-based vaccine. Morphological evaluation of the W/O/W multiple emulsions showed that the oil-droplets were homogenously dispersed with the gp100 peptide encapsulated in an inner aqueous phase. Immunization with the gp100 peptide delivered in the W/O/W multiple emulsions-based vaccine resulted in increased protection against tumor challenge compared to IFA-based vaccine (p < 0.05, n = 8) signifying induction of enhanced anti-tumor immunity. In addition, serum Th1 cytokine levels and immuno-histochemistry of excised tumor tissues indicated activation and local infiltration of antigen specific cytotoxic T-lymphocytes into and/or surrounding the tumor mass. Moreover, the newly developed vaccine formu...Continue Reading


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