Centelion

Aventis Pharma S.a.

Fabienne Soubrier

Joel Crouzet

Joël Crouzet

A circular DNA molecule, useful for gene therapy, comprising at least one nucleic acid sequence of interest, characterised in that the region allowing the replication thereof has an origin of replication with a functionality in a host cell that requires the presence of at least one specific protein foreign to said host cell. A method for preparing same, cells incorporating said DNA molecules and uses thereof in gene therapy are also described.

Circular DNA molecule having a conditional origin of replication, process for their preparation and their use in gene therapy

A prokaryotic recombinant host cell comprising a heterologous replication initiation protein that activates a conditional origin of replication and an extrachromosomal DNA molecule comprising a heterologous therapeutic gene and a conditional origin of replication whose functionality in the prokaryotic recombinant host cell requires a replication initiating protein which is foreign to the host cell is described. The host cell may comprise a pir gene having at least one mutation, which may occur in the pir gene copy number control region, the pir gene leucine zipper-like motif, or the pir gene DNA binding region.

A circular DNA molecule, useful for gene therapy, comprising at least one nucleic acid sequence of interest, characterized in that the region allowing the replication thereof has an origin of replication with a functionality in a host cell that requires the presence of at least one specific protein foreign to said host cell. A method for preparing same, cells incorporating said DNA molecules and uses thereof in gene therapy are also described.

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Thiais, France

Fabienne Soubrier