FN1 and neoplasm: The expression of Col1 (COL1A1) and FN (FN1) were detected by western blotting (WB), quantitative real time-polymerase chain reaction (qRT-PCR), immunofluorescence (IF), and confocal laser scanning microscopy (CLSM) in cells and tumor tissue sections from mice xenografts, while the transcription of COL1A1 was detected by luciferase reporter gene assay.