Generation of an adenovirus-parvovirus chimera with enhanced oncolytic potential.
Fiche publication
Date publication
octobre 2012
Auteurs
Membres identifiés du Cancéropôle Est :
Dr DERYCKERE Francois, Dr MARCHINI Antonio, Dr DAEFFLER Laurent
Tous les auteurs :
El-Andaloussi N, Bonifati S, Kaufmann JK, Mailly L, Daeffler L, Deryckere F, Nettelbeck DM, Rommelaere J, Marchini A
Lien Pubmed
Résumé
In this study, our goal was to generate a chimeric adenovirus-parvovirus (Ad-PV) vector that combines the high-titer and efficient gene transfer of adenovirus with the anticancer potential of rodent parvovirus. To this end, the entire oncolytic PV genome was inserted into a replication-defective E1- and E3-deleted Ad5 vector genome. As we found that parvoviral NS expression inhibited Ad-PV chimera production, we engineered the parvoviral P4 early promoter, which governs NS expression, by inserting into its sequence tetracycline operator elements. As a result of these modifications, P4-driven expression was blocked in the packaging T-REx-293 cells, which constitutively express the tetracycline repressor, allowing high-yield chimera production. The chimera effectively delivered the PV genome into cancer cells, from which fully infectious replication-competent parvovirus particles were generated. Remarkably, the Ad-PV chimera exerted stronger cytotoxic activities against various cancer cell lines, compared with the PV and Ad parental viruses, while being still innocuous to a panel of tested healthy primary human cells. This Ad-PV chimera represents a novel versatile anticancer agent which can be subjected to further genetic manipulations in order to reinforce its enhanced oncolytic capacity through arming with transgenes or retargeting into tumor cells.
Référence
J Virol. 2012 Oct;86(19):10418-31