Table 1.

Cytokines involved in the homing of MSCs to tumors

Category	Literature references
Inflammatory cytokines
TNF-α	[27,28]
IFN-γ	[27]
IL-1β	[27]
IL-6	[29,34]
IL-8	[35]
Growth factors
TGF-β	[36]
PGF	[33]
PDGF	[27]
HGF	[27]
Chemokines
SDF-1/CXCR4	[30,31]
MMP	[37]
VCAM-1	[38]
CXCL (GRO-a)	[29,35]
MCP-1	[39]
Other factors
HIF-1	[33]
LL-37	[40]