Cytokines present in the tumor microenvironment can promote the invasiveness and metastatic potential of cancer cells. We therefore investigated the effects of interleukin-1 beta (IL-1B) and transforming growth factor beta-3 (TGFB3) on the non-small cell lung carcinoma (NSCLC) cell line A549. We found that these cytokines synergistically activated matrix metalloproteinase (MMP)-1, MMP-3, and MMP-10 gene expression in these cells through mitogen-activated protein kinase (MAPK)-dependent pathways. Consistent with this, both cytokines stimulated epithelial to mesenchymal transition and MAPK-dependent invasion through Matrigel™. These studies identify IL-1B and TGFB3 as pro-invasive factors in NSCLC and potential therapeutic targets for tumor progression.
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| http://dx.doi.org/10.1016/j.canlet.2012.07.009 | DOI Listing |
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