title: Prognostic significance of MUC1 epithelial mucin expression in breast cancer.
abstract: The epithelial mucin produced by the MUC1 gene is present in the apical cell membrane of normal breast epithelial cells and is highly expressed in many breast cancers. Several studies have provided conflicting evidence regarding the relationship between MUC1 expression and survival in breast cancer patients. In this study a detailed immunohistological analysis of MUC1 expression was performed using monoclonal antibody BC2 and was related to other tumor characteristics and patient survival. Patients whose tumors showed MUC1 expression in greater than 75% of tumor cells had significantly poorer disease-free and overall survival (P < .05). The proportion of cells showing cytoplasmic MUC1 expression was prognostically significant, but the proportion of cells that lined gland spaces showing apical membrane staining was of no prognostic significance. A high level of MUC1 expression was significantly associated with the presence of axillary node metastases and estrogen receptors but not with other tumor characteristics.
authors.affiliation: Department of Obstetrics and Gynecology, University of Queensland, Royal Brisbane Hospital, Herston, Australia.
authors.forename: M A
authors.initials: MA
authors.lastname: McGuckin
authors.forename: M D
authors.initials: MD
authors.lastname: Walsh
authors.forename: B G
authors.initials: BG
authors.lastname: Hohn
authors.forename: B G
authors.initials: BG
authors.lastname: Ward
authors.forename: R G
authors.initials: RG
authors.lastname: Wright
mesh_terms: D000704:Analysis of Variance; D001365:Axilla; D001943:Breast Neoplasms / Q000737:chemistry* / Q000401:mortality / Q000473:pathology; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008562:Membrane Glycoproteins / Q000032:analysis* / Q000096:biosynthesis; D008593:Menopause; D018396:Mucin-1; D009077:Mucins / Q000032:analysis* / Q000096:biosynthesis; D009361:Neoplasm Invasiveness; D009363:Neoplasm Proteins / Q000032:analysis* / Q000096:biosynthesis; D011379:Prognosis; D011960:Receptors, Estrogen / Q000032:analysis; D012044:Regression Analysis; D012189:Retrospective Studies; D015996:Survival Rate
chemical_list: D008562:Membrane Glycoproteins; D018396:Mucin-1; D009077:Mucins; D009363:Neoplasm Proteins; D011960:Receptors, Estrogen