Treatment of human tumors by genetic transformation of human...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/86 (2006.01) A61K 38/45 (2006.01) A61K 48/00 (2006.01) C12N 5/10 (2006.01) C12N 15/867 (2006.01)

Patent

CA 2169557

A method of treating a tumor in a human host wherein tumor cells are transduced in vivo with a nucleic acid sequence (DNA or RNA) encoding an agent which is capable of providing for the inhibition, prevention, or destruction of the growth of the tumor cells upon expression of the nucleic acid sequence encoding the agent. In one embodiment, such treatment is effected by administering to the tumor in vivo producer cells transducer with a retroviral vector including a gene encoding a negative selective marker. Once the producer cells are administered to the tumor, the producer cells generate infectious viral particles which infect the tumor cells. Upon subsequent administration of an interaction agent which interacts with the negative selective marker to produce an agent which is toxic to the tumor cells, the transduced tumor cells are killed. In a preferred embodiment, the method is used to treat human brain tumors.

Procédé de traitement d'une tumeur chez un hôte humain selon lequel on effectue la transduction in vivo des cellules tumorales avec une séquence d'acide nucléique (ADN ou ARN) codant un agent qui est capable d'assurer l'inhibition, la prévention ou la destruction du développement des cellules tumorales lors de l'expression de la séquence d'acide nucléique qui code ledit agent. Dans une forme d'exécution, on effectue ce traitement en administrant à la tumeur in vivo des cellules productrices transduites avec un vecteur retroviral comprenant un gène codant un marqueur sélectif négatif. Lorsque les cellules productrices sont administrées à la tumeur, elles génèrent des particules virales infectieuses qui infectent les cellules tumorales. Lorsqu'on administre ensuite un agent d'interaction qui interagit avec le marqueur sélectif négatif pour produire un agent qui est toxique pour les cellules tumorales, les cellules tumorales transduites sont détruites. Dans une forme d'exécution préférée, on utilise ce procédé pour traiter les tumeurs cérébrales chez l'homme.

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