Gene expression analysis of cancer pathways. Gene expression analysis was performed using the RT2 Profiler PCR Array PAHS-033R SABioscience. Volcano plots of MSC-SAR samples (n = 4) compared to MSC-CTRL (n = 4) at early (A) and late (B) passages are reported. The volcano plot of the U2OS tumor cells versus MSC-CTRL samples is shown in (C). Also see Table 3.