3-O-methylfunicone produced by Penicillium pinophilum affects cell motilità of breast cancer cells, downregulating avb5 integrin and inhibiting metalloproteinase-9 secretion.

Recent evidence assigns integrins and metalloproteinases (MMPs) an important role in regulating tumor cell progression. Here, we demonstrate that 3-O-methylfunicone (OMF), a secondary metabolite produced by Penicillium pinophilum, affects cell proliferation and motility of breast cancer MCF-7 cells, downregulating avb5 integrin, and inhibiting MMP-9 secretion. This effect was absent when the non-tumoral MCF-10 cell line was used. Inhibition of cell motility was also associated to modifications in cell shape and in the distribution of tubulin fibers of OMF-treated MCF- 7 cells. In addition, a possible effect on survivin and hTERT was also investigated. We found that OMF strongly inhibits survivin and hTERT gene expression. The results of this study indicate that OMF-induced inhibition of cell motility may be mediated through the modulation of avb5 integrin and MMP-9 secretion. In addition, the inhibition of typical markers of tumor progression such as hTERT and survivin in MCF-7 and their inactivity towards MCF10 provide strong evidence for a potential use of OMF in anticancer therapy.