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Stable transduction of actively dividing cells via a (...)

Mol Ther. 2000 Apr ;1(4):314-22
Stable transduction of actively dividing cells via a novel adenoviral/episomal vector.
Leblois H, Roche C, Di Falco N, Orsini C, Yeh P, Perricaudet M.

Many gene therapy indications would benefit from vectors capable of achieving efficient in vivo delivery and long-term transgene expression in either dividing or nondividing cells. Such vector systems are not yet available. To achieve both goals, we have used noncytotoxic E1- and E4-deleted adenoviral vectors as vehicles for delivering an Epstein-Barr virus-based self-replicating episome (replicon) via Cre/loxP site-specific recombination. Co-infection of human cells with a proreplicon-encoded and a Cre-expressing adenovirus resulted in efficient delivery and excision of a functional replicon in the absence of vector-induced cytotoxicity. In addition, replication and nuclear retention of the replicon in the cell progeny translated into a prolonged transgene expression in actively dividing cells, both in vitro and in vivo. Combining desired features from different viruses within a single hybrid vector system should expand the range of clinical indications currently amenable to gene transfer.


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