Abstract
Progression through the mammalian cell cycle is regulated by cyclin—cyclin-dependent kinase (CDKs) complexes that are activated throughout the cell cycle. Alteration in cell cycle control could lead to proliferation and tumourogenesis. This study was designed to analyse, at messenger RNA (mRNA) level, cyclins and CDKs involved in the retinoblastoma pathway, as well as cell division cycle 25a phosphatase (CDC25a), which activates some of the CDKs that were analysed. The aim of the study was to determine the possible prognostic relevance of these molecules in 73 women with peri- and post-menopausal breast cancer. Cyclins A, D1 and E; CDKs 2, 4 and 6 and phosphatase CDC25a expression status were analysed in primary tumours at mRNA level, by reverse transcriptase polymerase chain reaction analysis in paraffin-embedded primary breast cancers. High expression levels of CDK2, CDK4 and CDC25a were related to tumour recurrence. Over-expression of CDK2 and CDC25a was also associated with reduced overall survival; moreover, the CDK2 expression level was able to define a short-living cohort of patients with tumour-positive lymph nodes. CDK2, CDK4 and CDC25a can be used as reliable biomarkers to predict prognosis in women with peri- and post-menopausal breast cancer.
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The authors thank Dr. Georgine Faulkner for the English revision of the manuscript.
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Bonin, S., Brunetti, D., Benedetti, E. et al. Expression of cyclin-dependent kinases and CDC25a phosphatase is related with recurrences and survival in women with peri- and post-menopausal breast cancer. Virchows Arch 448, 539–544 (2006). https://doi.org/10.1007/s00428-005-0146-5
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DOI: https://doi.org/10.1007/s00428-005-0146-5