The present invention relates to a triple hybrid vector amplicon system comprising genetic elements derived from Herpes Simplex Virus (HSV), Epstein-Barr Virus (EBV) or Adeno-Associated Virus (AAV), and a retrovirus. The vector was developed to stably transform cells, both in culture or in vivo, into retrovirus packaging cells in a single step. This step can be accomplished both by transfection using liposomes, electroporation, calcium phosphate, or any other methodology used to transfer naked or complexed DNA into cells or by infection when the vector is packaged as an amplicon vector in HSV virions.
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