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J. Virol., 12 1996, 8422-8430, Vol 70, No. 12
S Wang and JM Vos
We have developed a miniviral vector, pH300, based on the human
herpesviruses 1 and 4, herpes simplex virus type 1 (HSV-1), and Epstein-
Barr virus (EBV), carrying EBV sequences for plasmid episomal maintenance
and HSV-1 sequences for amplification and packaging in multimeric form into
HSV-1 capsids in the presence of a helper virus and helper cell line. A
reporter gene, the bacterial lacZ gene, which expressed beta-galactosidase,
was inserted into the multiple cloning site of pH300 to make pH300-lac. The
packaged pH300-lac DNA was very efficient in infecting human cells in
tissue culture. The pH300-lac miniviral stock was used to infect in vitro
various human cell types derived from breast cancer, lung cancer, and liver
cancer. Up to 95% of cells were infected and expressed beta-galactosidase
activity after exposure to viral stock at a multiplicity of infection of 3.
There was essentially no apparent cytotoxicity after infection of cultured
cells in vitro. To test in vivo gene delivery, human liver tumor cells
preimplanted subcutaneously in nude mice and injected in situ with
pH300-lac showed high efficiency of ectopic gene expression. The pH300
miniviral vector is a simple and effective gene transfer system which shows
potential for gene therapy of cancer and inherited diseases.
Copyright © 1996, American Society for Microbiology
A hybrid herpesvirus infectious vector based on Epstein-Barr virus and herpes simplex virus type 1 for gene transfer into human cells in vitro and in vivo
Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, 27599-7295, USA.
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