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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
CCND1 amplification and cyclin D1 expression in breast cancer and their relation with proteomic subgroups and patient outcome
Breast Cancer Research and Treatment, Volume 109, No. 2, Year 2008
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Description
Introduction: Despite strong evidence regarding the role of CCND1 amplification and protein overexpression in breast carcinoma, the associations between CCND1 amplification/cyclin D1 overexpression and clinicopathological variables and clinical outcome remain controversial. Aims of the study: (1) to correlate cyclin D1 expression with gene amplification; (2) to analyse the correlations between CCND1 amplification and overexpression with clinicopathological features and patients' outcome in invasive breast cancer; (3) to define the prevalence and clinical significance of cyclin D1 overexpression and CCND1 amplification in ER positive breast carcinomas (4) to define the prevalence of cyclin D1 overexpression and CCND1 amplification in breast cancers with basal-like immunophenotype. Materials and methods: CCND1 amplification and protein expression were assessed on a tissue microarray containing 880 unselected invasive breast cancer cases, by means of chromogenic in situ hybridisation using the Spotlight CCND1 amplification probe and immunohistochemistry, using the rabbit monoclonal antibody SP4. Results: A total of 59/613 tumours (9.6%) showed CCND1 amplification and 224/514 (43.6%) showed strong cyclin D1 expression. A strong positive correlation between CCND1 amplification and higher levels of cyclin D1 expression was found (P < 0.001). Basal-like cancers showed infrequent CCND1 amplification and cyclin D1 overexpression (P < 0.001). Both CCND1 amplification and cyclin D1 expression were associated with positive ER status. CCND1 gene amplification was an independent prognostic factor for patients with ER positive breast cancer. Conclusion: Our results demonstrate a strong correlation between CCND1 amplification and its protein expression in breast cancer. However, protein expression is more pervasive than gene amplification and associated with ER expression. © 2007 Springer Science+Business Media, LLC.
Authors & Co-Authors
Elsheikh, Somaia Elbauomy
United Kingdom, Nottingham
Nottingham University Hospitals Nhs Trust
Green, Andew R.
United Kingdom, Nottingham
Nottingham University Hospitals Nhs Trust
Aleskandarany, Mohammed A.
United Kingdom, Nottingham
Nottingham University Hospitals Nhs Trust
Grainge, Matthew J.
United Kingdom, Nottingham
Nottingham University Hospitals Nhs Trust
Paish, Claire E.
United Kingdom, Nottingham
Nottingham University Hospitals Nhs Trust
Lambros, Maryou Ballo K.
United Kingdom, London
The Institute of Cancer Research
Reis-Filho, Jorge Sérgio
United Kingdom, London
The Institute of Cancer Research
Ellis, Ian O.
United Kingdom, Nottingham
Nottingham University Hospitals Nhs Trust
Statistics
Citations: 117
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1007/s10549-007-9659-8
ISSN:
01676806
Research Areas
Cancer
Genetics And Genomics
Health System And Policy
Study Design
Cross Sectional Study