IL6 and hepatocellular carcinoma: In the present study, we first measured theconcentration of interleukin-6 (IL-6) in BMSC conditioned medium (BMSC-CM).Next, we assessed the changes of invasion ability in response to treatment ofBMSC-CM or recombinant IL-6 in two human HCC cell lines Bel-7404 and HepG2.