When lung cancer cells in which FGFRL1 had been silenced with siRNA were compared with lung cancer cells, migratory and invasive potential were enhanced; expression levels of N‐cadherin, vimentin, MMP‐9 and MMP‐1 increased; and E‐cadherin expression decreased (Figure 7A‐D). This evidence concerns the gene MMP9 and lung carcinoma.