Cell-mediated delivery of drugs or nanoparticles has large potential in cancer therapy because they can cross the nearly impermeable biological barriers to reach many areas in the body that common drugs/nanoparticles cannot normally access [24e29]. In recent years, cell-mediated delivery has been widely used in the
therapy of many kinds of tumors, including glioma, head and neck carcinoma, breast cancer and so on [30e32]. Based on the mechanism, this method appears to be suitable for all kinds of tumors but in reality, not all cells can be treated by cell delivery.