Somatic mutation load of estrogen receptor-positive breast tumors predicts overall survival: an analysis of genome sequence data

Breast cancer is one of the most commonly diagnosed cancers in women. While there are several effective therapies for breast cancer and important single gene prognostic/predictive markers, more than 40,000 women die from this disease every year. The increasing availability of large-scale genomic dat...

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Veröffentlicht in:Breast cancer research and treatment Jg. 146; H. 1; S. 211 - 220
Hauptverfasser: Haricharan, Svasti, Bainbridge, Matthew N., Scheet, Paul, Brown, Powel H.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Boston Springer US 01.07.2014
Springer
Springer Nature B.V
Schlagworte:
Adult
Aged
Analysis
Biomarkers, Tumor
Breast cancer
Breast Neoplasms - genetics
Breast Neoplasms - mortality
Breast Neoplasms - pathology
Brief Report
Cancer
Cancer research
Computational Biology - methods
Databases, Nucleic Acid
DNA Damage
DNA Repair
Estrogen
Estrogens
Female
Genetic aspects
Genetic Association Studies
Genomes
Genomics
Humans
Medical diagnosis
Medicine
Medicine & Public Health
Middle Aged
Mutation
Neoplasm Metastasis
Neoplasm Staging
Oncology
Patient outcomes
Phenols
Prognosis
Proportional Hazards Models
Receptors, Estrogen - genetics
Tumor Burden
Tumors
DNA damage repair
Estrogen receptor
Breast cancer
Mutation load
ISSN:0167-6806, 1573-7217, 1573-7217
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Zusammenfassung:Breast cancer is one of the most commonly diagnosed cancers in women. While there are several effective therapies for breast cancer and important single gene prognostic/predictive markers, more than 40,000 women die from this disease every year. The increasing availability of large-scale genomic datasets provides opportunities for identifying factors that influence breast cancer survival in smaller, well-defined subsets. The purpose of this study was to investigate the genomic landscape of various breast cancer subtypes and its potential associations with clinical outcomes. We used statistical analysis of sequence data generated by the Cancer Genome Atlas initiative including somatic mutation load (SML) analysis, Kaplan–Meier survival curves, gene mutational frequency, and mutational enrichment evaluation to study the genomic landscape of breast cancer. We show that ER + , but not ER − , tumors with high SML associate with poor overall survival (HR = 2.02). Further, these high mutation load tumors are enriched for coincident mutations in both DNA damage repair and ER signature genes. While it is known that somatic mutations in specific genes affect breast cancer survival, this study is the first to identify that SML may constitute an important global signature for a subset of ER + tumors prone to high mortality. Moreover, although somatic mutations in individual DNA damage genes affect clinical outcome, our results indicate that coincident mutations in DNA damage response and signature ER genes may prove more informative for ER + breast cancer survival. Next generation sequencing may prove an essential tool for identifying pathways underlying poor outcomes and for tailoring therapeutic strategies.
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ISSN:0167-6806
1573-7217
1573-7217
DOI:10.1007/s10549-014-2991-x