title: Prognostic value of cell cycle regulator molecules in surgically resected stage I and II breast cancer.
abstract: Success in breast cancer treatment depends greatly upon early detection, and in the employment of prognostic markers able to anticipate the evolution of the disease, allowing a more rational management of the patient. A fundamental cause of cancer is the alteration of the genetic material, which may modify the expression of proteins that play key roles in cell cycle progression. The aim of this study was to analyze the expression of cyclins D1, E, and B1 and of the CDKIs p16 and p21 in a population of uniformly treated patients with stage I or II breast tumors (n=56) compared with patients with benign breast pathology (n=23). Malignant breast tumors showed higher cyclin E and lower p21 expression than benign breast pathology (NS), determined by immunohistochemistry (IHC). In breast cancer patients, overexpression of cyclins D1 and E was associated with the presence of ER and stage respectively independently of other prognostic variables (multivariate analysis). Kaplan-Meier curves demonstrated that only overexpression of cyclin E was associated with a longer recurrence-free survival. Cox analysis showed that neither cyclins nor CDKIs were independent prognostic markers. We demonstrated that several regulators of cell cycle progression were altered in a large number of breast tumor cases, however, these abnormalities were not indicators of a worse outcome in breast cancer patients of stages I and II.
authors.affiliation: Area Investigación, Instituto de Oncología Angel H. Roffo, (C1417DTB) Buenos Aires, Argentina. mgpeters@hotmail.com
authors.forename: Maria Giselle
authors.initials: MG
authors.lastname: Peters
authors.forename: Maria del Carmen C
authors.initials: Mdel C
authors.lastname: Vidal
authors.forename: Liliana
authors.initials: L
authors.lastname: Giménez
authors.forename: Laura
authors.initials: L
authors.lastname: Mauro
authors.forename: Eduardo
authors.initials: E
authors.lastname: Armanasco
authors.forename: Carlos
authors.initials: C
authors.lastname: Cresta
authors.forename: Elisa
authors.initials: E
authors.lastname: Bal de Kier Joffé
authors.forename: Lydia
authors.initials: L
authors.lastname: Puricelli
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000378:metabolism*; D015153:Blotting, Western; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000378:metabolism* / Q000601:surgery; D044584:Carcinoma, Ductal / Q000175:diagnosis / Q000378:metabolism / Q000601:surgery; D018275:Carcinoma, Lobular / Q000175:diagnosis / Q000378:metabolism / Q000601:surgery; D002453:Cell Cycle; D018797:Cell Cycle Proteins / Q000032:analysis / Q000378:metabolism; D019926:Cyclin B / Q000378:metabolism; D056744:Cyclin B1; D019938:Cyclin D1 / Q000378:metabolism; D019927:Cyclin E / Q000378:metabolism; D019941:Cyclin-Dependent Kinase Inhibitor p16 / Q000378:metabolism; D050759:Cyclin-Dependent Kinase Inhibitor p21; D050760:Cyclin-Dependent Kinase Inhibitor p27; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D015996:Survival Rate; D025521:Tumor Suppressor Proteins
chemical_list: D014408:Biomarkers, Tumor; C534699:CCNB1 protein, human; C493956:CDKN1A protein, human; D018797:Cell Cycle Proteins; D019926:Cyclin B; D056744:Cyclin B1; D019927:Cyclin E; D019941:Cyclin-Dependent Kinase Inhibitor p16; D050759:Cyclin-Dependent Kinase Inhibitor p21; D025521:Tumor Suppressor Proteins; D019938:Cyclin D1; D050760:Cyclin-Dependent Kinase Inhibitor p27