“…In several human tumors, including colorectal cancer, breast cancer, prostate cancer, pancreatic cancer, Merkel cell carcinoma, hepatocellular carcinoma, up-regulated levels of MMP-21 have been found, generally in association with poor prognosis (Bister et al, 2007;Hegedüs et al, 2008;Huang et al, 2011;Suomela et al, 2009;Wu et al, 2011b).…”