BACKGROUND: Matrix metalloproteinases (MMPs) play an important role in invasion and metastatic spread of cancer cells. The objective of this study was to assess MMPs in plasma of Dunning tumor rats as indicators of the progression of prostate cancer and follow-up parameters after treatment. METHODS: Prostate cancer was induced in male Copenhagen rats by either subcutaneous or orthotopic implantation of R3327-MatLyLu cells. During the development of the tumor, plasma MMP-2, and MMP-9 were measured by gelatin-substrate zymography and Western blot technique with densitometry in untreated animals, rats treated with laser-induced hyperthermia, or with the new synthetic MMP inhibitor RO 28-2653. RESULTS: Normal prostatic tissue of the Copenhagen rats predominantly expressed proMMP-2 but not proMMP-9 whereas MMP-9 was only found in cancerous tissue. Elevated plasma MMP-9 values were demonstrated in rats with subcutaneous or orthotopic tumors. Animals with tumors and treated with the MMP inhibitor RO 28-2653 had both a lower tumor volume and a lower plasma MMP-9 concentration compared with controls. CONCLUSIONS: The determination of plasma MMP-9 in Dunning tumor rats is a useful tool to monitor the progression of prostate cancer and to assess the efficacy of drugs like MMP inhibitors or other treatment protocols. Copyright 2002 Wiley-Liss, Inc.
BACKGROUND: Matrix metalloproteinases (MMPs) play an important role in invasion and metastatic spread of cancer cells. The objective of this study was to assess MMPs in plasma of Dunning tumorrats as indicators of the progression of prostate cancer and follow-up parameters after treatment. METHODS:Prostate cancer was induced in male Copenhagen rats by either subcutaneous or orthotopic implantation of R3327-MatLyLu cells. During the development of the tumor, plasma MMP-2, and MMP-9 were measured by gelatin-substrate zymography and Western blot technique with densitometry in untreated animals, rats treated with laser-induced hyperthermia, or with the new synthetic MMP inhibitor RO 28-2653. RESULTS: Normal prostatic tissue of the Copenhagen rats predominantly expressed proMMP-2 but not proMMP-9 whereas MMP-9 was only found in cancerous tissue. Elevated plasma MMP-9 values were demonstrated in rats with subcutaneous or orthotopic tumors. Animals with tumors and treated with the MMP inhibitor RO 28-2653 had both a lower tumor volume and a lower plasma MMP-9 concentration compared with controls. CONCLUSIONS: The determination of plasma MMP-9 in Dunning tumorrats is a useful tool to monitor the progression of prostate cancer and to assess the efficacy of drugs like MMP inhibitors or other treatment protocols. Copyright 2002 Wiley-Liss, Inc.
Authors: Stefan Lorenzl; Noel Calingasan; Lichuan Yang; David S Albers; Shuei Shugama; Jason Gregorio; H W Krell; Jason Chirichigno; Tong Joh; M Flint Beal Journal: Neuromolecular Med Date: 2004 Impact factor: 3.843
Authors: Roopali Roy; Gwendolyn Louis; Kevin R Loughlin; Dmitri Wiederschain; Susan M Kilroy; Carolyn C Lamb; David Zurakowski; Marsha A Moses Journal: Clin Cancer Res Date: 2008-10-15 Impact factor: 12.531