Molecules involved in MSCs homing to tumor microenvironments are mainly consisting of several inflammatory cytokines (TNF-α, IL-1β, IFN-γ, and IL-6), chemokines (CXCR4, CXCL7, CXCL6, and CXCL5) and growth factors (PDGF, HGF), [85, 86]. The gene discussed is IL1B; the disease is neoplasm.