Figure 4.
Effects of VSCC-SCs, SCC-SCs and HDFs on the invasion of HSC-3 cells in bone invasion regions. IHC was used to determine the expression levels of (A) MMP9 and (B) MT1-MMP. Semi-quantification of (C) MMP9 and (D) MT1-MMP expression levels in bone invasion regions of HSC-3 cells. Data are shown as the median and IQR, n=4. Statistical analysis was performed by Kruskal-Wallis test followed by Dunn's test. nsP>0.05, *P<0.05, **P<0.01, ****P<0.0001 vs. HSC-3 or as indicated. HDFs, human dermal fibroblasts; MMP, matrix metalloproteinase; IHC, immunohistochemistry; MT1-MMP, membrane-type 1 MMP; SCC-SC, squamous cell carcinoma-associated stromal cells; VSCC-SC, verrucous squamous cell carcinoma-associated stromal cells.