However, there appears to be an obvious decrease in TGF-β-1 levels compared with their respective control levels, as shown in Figures 4A,B and C. Interestingly, opposite trends were observed when comparing the production of TGF-β-1 and IL-8 from human dermal fibroblasts (Figure 4B) and from Saos-2 human osteosarcoma cells (Figure 4C). Here, TGFB1 is linked to osteosarcoma.