MMP26 and Familial prostate cancer: MMP-15 and MMP-26: In a comprehensive survey of the expression of various MMPs, serine protease families, and their natural inhibitors in human prostate cancer and benign prostate specimens, expression of several MMPs (MMP-10, -15, -24, -25 and -26) was increased in malignant tissue compared to benign prostate tissue [38].