MMP9 and prostate cancer: Correlation analysis in prostate cancer samples from TCGA cohort using Tumor Immune Estimation Resource (TIMER) and Gene Expression Profiling Interactive Analysis (GEPIA) database demonstrated a positive correlation between mRNA levels of CARHSP1 and MMP2, MMP9, CDH2 (N-cadherin), SNAI1 (Snail), and VIM (vimentin) (Fig. S2A, S2B).