CD40LG and infection: To investigate infection efficiency of Ad5-PK in immature dendritic cells (iDCs), the gene transfer assay was performed with a panel of genetically modified adenoviruses that are currently undergoing study for clinical application: Ad5Luc1 (wild type), DC infectivity enhanced Ad5/3Luc1, DC targeted Ad5Luc.FF/CD40L, and Ad5Luc1-PK.