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Erschienen in: Breast Cancer Research and Treatment 1/2008

01.09.2008 | Preclinical Study

Triple negative breast cancer: molecular profiling and prognostic impact in adjuvant anthracycline-treated patients

verfasst von: David S. P. Tan, Caterina Marchió, Robin L. Jones, Kay Savage, Ian E. Smith, Mitch Dowsett, Jorge S. Reis-Filho

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 1/2008

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Abstract

Background

We analysed the clinical features, distribution of basal markers, prevalence of oncogene amplification, and outcome of triple negative (TN) compared to those of non-TN cancers in a series of adjuvant-anthracycline treated breast cancer patients.

Methods

We examined the prognostic impact of the TN and BL phenotype in 245 breast cancer patients uniformly treated with adjuvant anthracycline-based chemotherapy following primary surgery, with regards to local relapse-free (LRFS), metastasis free (MFS), and breast cancer specific survival (BCSS). A comparative analysis of the clinicopathological characteristics, expression of basal markers (cytokeratins (Cks) 5/6, 14, 17, EGFR, and caveolin 1 and 2), MIB-1, p53 and topoisomerase II alpha, and prevalence of CCND1, MYC and TOP2A amplification in TN and non-TN breast tumours was performed.

Results

TN cancers were significantly associated with the expression of basal markers (all P < 0.0001). However 19.4% of TN tumours were negative for basal markers, whilst 7.3% of non-TN tumours expressed basal markers. TN phenotype was significantly associated with p53, MIB-1 and topoisomerase II alpha (all, P < 0.01) expression. No TN cancer harboured amplification of CCND1 or TOP2A. In univariate analysis, TN and BL phenotype were significantly associated with shorter MFS (both, P < 0.01) and BCSS (both, P < 0.005) but not LRFS.

Conclusions

Despite treatment with standard dose anthracycline-based chemotherapy, the clinical outcome of TN and BL cancers remains poor. Alternative chemotherapeutic regimens and/or novel therapeutic approaches are warranted. Although a significant phenotypic overlap exists between TN and basal-like tumours, the TN phenotype is not an ideal surrogate marker for basal-like breast cancers.
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Metadaten
Titel
Triple negative breast cancer: molecular profiling and prognostic impact in adjuvant anthracycline-treated patients
verfasst von
David S. P. Tan
Caterina Marchió
Robin L. Jones
Kay Savage
Ian E. Smith
Mitch Dowsett
Jorge S. Reis-Filho
Publikationsdatum
01.09.2008
Verlag
Springer US
Erschienen in
Breast Cancer Research and Treatment / Ausgabe 1/2008
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-007-9756-8

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