Jing et al. pretreated 2D-cultured BMMSC with IFNγ and TNFα to mimic the inflammation condition in tumor, and they found that the conditioned medium of MSC could promote the metastasis of HCC cell line SMMC-7721 and HeP-3B though the elevated expression of TGF-β, which induced the EMT of HCC cells [29]. Here, TNF is linked to hepatocellular carcinoma.