Fig. 6

hLC-MSCs effects on tumor cell growth in an in vitro contact system. hLC-MSCs did not affect the kinetics of CT-26, MC-38, A549, or HepG2 tumor cells in vitro after 24 h (A) or 48 h (B) of exposure in the contact system. The histograms show the luciferase activity of the indicated cells cultured for 24 h or 48 h in vitro in the presence or absence of hLC-MSCs (n = 5). *P ≤ 0.05, **P ≤ 0.001, n.s. > 0.05 by Student’s t-test. The error bars represent the SD of three independent experiments. hLC-MSC human lung cancer-derived mesenchymal stem cells; CT-26 an undifferentiated colon carcinoma cell line; MC-38 a murine colon adenocarcinoma cell line; A549 lung carcinoma epithelial cell line; HepG2 a human liver cancer cell line; n.s. not significant; SD standard deviation