"Based on bioinformatic analysis MMP1 and FHL1 are potentially functional proteins associated with differences of highly-metastatic prostate cancer PC-3M-1E8 cell line and poorly-metastatic PC-3M-2B4 cell line. In addition functional analyses demonstrated that silencing MMP1 remarkably weakened the in vitro migratory and invasive capabilities of the PC-3M-1E8 cells."xsd:string