Tumor-promoting effect of CC-MSCs on SW48 cells is reduced by the addition of anti-IL-6 antibody and the inhibitor of STAT3. a Transwell migration assay of SW48 cells exposed to CC-MSC-CM with or without anti-IL-6 antibody treatment (×100). b Colony-formation assay of SW48 cells treated with CC-MSC-CM in the presence or absence of anti-IL-6 antibody. c Wound-healing assay of SW48 cells exposed to CC-MSC-CM was performed in the presence or absence of anti-IL-6 antibody (magnification, ×50; scale bar: 500 μm). d Transwell migration assay of SW48 cells exposed to CC-MSC-CM with or without the STAT3 inhibitor (Stattic) treatment (×100). e Colony-formation assay of SW48 cells treated with CC-MSC-CM in the presence or absence of the STAT3 inhibitor (Stattic). f Wound-healing assay of SW48 cells exposed to CC-MSC-CM was performed in the presence or absence of the STAT3 inhibitor (Stattic) (magnification, 50X; scale bar: 500 μm). * P