Development of dual toxoid-loaded layersomes for complete immunostimulatory response following peroral administration.

Aim: Present study reports the development of divalent vaccine with enhanced protection, permeation and presentation following peroral immunization.

Materials & Methods: Layersomes were prepared by layer-by-layer tuning of polyelectrolytes on liposomes template. The developed system was evaluated for in vitro stability of antigen and layersomes, cell-based assays and immunization experiments in mice.

Results: Layersomes exhibited enhanced stability in simulated biological fluids, still preserving the integrity, biological activity and conformational stability of toxoids. Layersomes also exhibited complete and protective (>0.1 IU/ml) immunostimulatory response include serum IgG titer, mucosal sIgA titer and cytokines (IL-2 and IFN-γ) levels following peroral administration.

Conclusion: The positive findings of proposed strategy are expected to contribute significantly in the field of stable liposomes technology and peroral immunization.