The present invention concerns the field of gene therapy and in particular the use of specific adenoviral vector systems for gene therapy, said vector systems offering enhanced efficiency and specificity for gene delivery. More specifically, the present invention provides replicating-competent adenoviral vector systems carrying one or more inserted heterologous gene. The adenoviral vectors system according to the invention are characterized by high binding efficiency and infectivity to cells of neural origin, endothelial cells, carcinoma cells and dendritic cells.
