Abstract
Polyomavirus virus-like particles (VLPs) can be produced free from viral genes and used as vectors for gene and immune therapy and as vaccines. For large-scale VLP manufacture, the major viral capsid protein (VP)1, is produced in a baculovirus insect cell system, Escherichia coli or yeast, and will self-assemble into VLPs under appropriate conditions. Murine polyomavirus (MPyV) VLP vaccination prevents primary MPyV infection and outgrowth of some MPyV-tumors in mice. Furthermore, MPyV-VLPs bind and introduce eukaryotic DNA into various cells in vitro and in vivo, while MPyV-VLPs containing fusion proteins between capsid proteins VP1, -2 or -3 and selected antigens can be used as vaccines. Similar findings apply to other polyomavirus VLPs. In summary, polyomavirus VLPs are useful vectors for immune and gene therapy and as vaccines, and different polyomavirus VLPs can be used for prime-boost therapy.
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