RT Journal Article SR Electronic T1 Urokinase-Plasminogen Activator, a New and Independent Prognostic Marker in Breast Cancer JF Cancer Research JO Cancer Res FD American Association for Cancer Research SP 6827 OP 6829 VO 50 IS 21 A1 Duffy, Michael J. A1 Reilly, David A1 O'Sullivan, Cathriona A1 O'Higgins, Niall A1 Fennelly, James J. A1 Andreasen, Peter YR 1990 UL http://cancerres.aacrjournals.org/content/50/21/6827.abstract AB Urokinase plasminogen activator (UK-PA) is a serine protease implicated in cancer invasion and metastasis. In this investigation, patients with breast cancers containing high levels of UK-PA antigen had significantly higher risk of early disease recurrence and shorter overall survival than did patients with low levels of the protein. In univariate analysis, UK-PA was a more powerful discriminator for disease-free interval than axillary node status, tumor size, or estradiol receptor. For overall survival, UK-PA as a prognostic marker, was of similar magnitude to axillary node status but stronger than that of tumor size or estradiol receptor. In multivariate analysis, for both disease-free interval and survival, UK-PA was an independent risk factor, being independent of tumor size, axillary node status, and estradiol receptor. UK-PA appears to be a new and independent prognostic marker in breast cancer. ©1990 American Association for Cancer Research.