"Our findings show that circPTK2 (hsa_circ_0008305) inhibits TGF-beta-induced EMT and metastasis by controlling TIF1gamma in NSCLC revealing a novel mechanism by which circRNA regulates TGF-beta-induced EMT and tumor metastasis and suggesting that circPTK2 overexpression could provide a therapeutic strategy for advanced NSCLC."xsd:string