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Journal of Virology, November 2007, p. 12704-12708, Vol. 81, No. 22
0022-538X/07/$08.00+0 doi:10.1128/JVI.01483-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Biotherapeutics Research Group, Robarts Research Institute, and Department of Microbiology and Immunology, University of Western Ontario, London, Ontario N6G 2V4, Canada,1 Department of Microbiology, State University of New York, Buffalo, New York 14214,2 Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida 326103
Received 6 July 2007/ Accepted 20 August 2007
Myxoma virus (MV) is a candidate for oncolytic virotherapy due to its ability to selectively infect and kill tumor cells, yet MV is a species-specific pathogen that causes disease only in European rabbits. To assess the ability of MV to deliver cytokines to tumors, we created an MV (vMyxIL-12) that expresses human interleukin-12 (IL-12). vMyxIL-12 replicates similarly to wild-type MV, and virus-infected cells secrete bioactive IL-12. Yet, vMyxIL-12 does not cause myxomatosis, despite expressing the complete repertoire of MV proteins. Thus, vMyxIL-12 exhibits promise as an oncolytic candidate and is safe in all known vertebrate hosts, including lagomorphs.
Published ahead of print on 29 August 2007.
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