Fiche publication
Date publication
juin 2006
Auteurs
Membres identifiés du Cancéropôle Est :
Pr DOLIVET Gilles
,
Dr LEROUX Agnès
,
Pr MERLIN Jean-Louis
Tous les auteurs :
Ndoye A, Dolivet G, Hogset A, Leroux A, Fifre A, Erbacher P, Berg K, Behr JP, Guillemin F, Merlin JL
Lien Pubmed
Résumé
Photochemical internalization (PCI) technology has been used for PEI-mediated p53 gene transfer in mice bearing head and neck squamous cell carcinoma (HNSCC) xenografts. Using luciferase as a reporter gene, PCI led to a 20-fold increase in transgene expression 48 h after transfection and sustained transgene expression for 7 days. Therefore, iterative p53 gene transfer was performed by means of a weekly single injection of PEIGlu4/p53 complexes alone or with PCI for 5 (group A) or 7 (group B) weeks. The efficiency of p53 gene therapy was evaluated by following tumor growth and expression of P53-related downstream proteins (P21, MDM2, Bcl2, Bax). Apoptosis induction was evidenced through caspase-3 activation and PARP cleavage. Using PCI, tumor growth inhibition was observed in all transfected animals. Further, successful tumor cure was achieved in 17% (group A) and 83% (group B) of animals. PCI-mediated p53 gene transfer led to higher P53 protein expression that was correlated with induction of Bax and P21 proapoptotic proteins, repression of Bcl2 as well as activation of caspase-3, and cleavage of PARP. The present study demonstrates that PCI enhances the in vivo efficiency of PEI-mediated p53 gene transfer and can be proposed for p53 gene therapy in HNSCC.
Référence
Mol Ther. 2006 Jun;13(6):1156-62
