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Modular, noncovalent conjugate vaccines to prevent bacterial infection

In vitro and mouse studies suggest modular, noncovalent conjugate vaccines could be useful for preventing bacterial infections. A pneumococcal peptide antigen fused to the biotin-binding protein rhizavidin was co-incubated with a biotinylated bacterial polysaccharide to form a tightly associated noncovalent complex. Mice vaccinated with the complex had better B and T cell responses and survival than controls inoculated with conventional pneumococcal conjugate vaccine. Next steps include developing a multivalent version of the vaccine targeting other bacterial antigens.
GlaxoSmithKline plc's Synflorix and Pfizer Inc.'s Prevnar and
Prevnar 13 pneumococcal conjugate vaccines are marketed to prevent pneumococcal disease.

SciBX 6(35); doi:10.1038/scibx.2013.979
Published online Sept. 12, 2013

Method of construction of noncovalent conjugate vaccines subject to a pending patent; available for licensing

Zhang, F. et al. Proc. Natl. Acad. Sci. USA; published online July 29, 2013;
Contact: Richard Malley, Boston Children's Hospital, Boston, Mass.