In the context of NB, MSC-delivered chemotherapeutic agents (paclitaxel), soluble factors with an anti-cancer effect (TNF-related apoptosis-inducing ligand (TRAIL), IFN-β, IFN-γ, IL2), microRNAs (miR-124), and oncolytic viruses have been studied so far. This evidence concerns the gene IL2 and neuroblastoma.