Journal article
A comprehensive analysis of prognostic signatures reveals the high predictive capacity of the Proliferation, Immune response and RNA splicing modules in breast cancer
Breast Cancer Research, Vol.10(6), R93
2008
Abstract
INTRODUCTION:
Several gene expression signatures have been proposed and demonstrated to be predictive of outcome in breast cancer. In the present article we address the following issues: Do these signatures perform similarly? Are there (common) molecular processes reported by these signatures? Can better prognostic predictors be constructed based on these identified molecular processes?
METHODS:
We performed a comprehensive analysis of the performance of nine gene expression signatures on seven different breast cancer datasets. To better characterize the functional processes associated with these signatures, we enlarged each signature by including all probes with a significant correlation to at least one of the genes in the original signature. The enrichment of functional groups was assessed using four ontology databases.
RESULTS:
The classification performance of the nine gene expression signatures is very similar in terms of assigning a sample to either a poor outcome group or a good outcome group. Nevertheless the concordance in classification at the sample level is low, with only 50% of the breast cancer samples classified in the same outcome group by all classifiers. The predictive accuracy decreases with the number of poor outcome assignments given to a sample. The best classification performance was obtained for the group of patients with only good outcome assignments. Enrichment analysis of the enlarged signatures revealed 11 functional modules with prognostic ability. The combination of the RNA-splicing and immune modules resulted in a classifier with high prognostic performance on an independent validation set.
CONCLUSIONS:
The study revealed that the nine signatures perform similarly but exhibit a large degree of discordance in prognostic group assignment. Functional analyses indicate that proliferation is a common cellular process, but that other functional categories are also enriched and show independent prognostic ability. We provide new evidence of the potentially promising prognostic impact of immunity and RNA-splicing processes in breast cancer.
Details
- Title
- A comprehensive analysis of prognostic signatures reveals the high predictive capacity of the Proliferation, Immune response and RNA splicing modules in breast cancer
- Authors/Creators
- F. Reyal (Author/Creator) - Institut CurieM.H. van Vliet (Author/Creator) - Delft University of TechnologyN.J. Armstrong (Author/Creator) - The Netherlands Cancer InstituteH.M. Horlings (Author/Creator) - The Netherlands Cancer InstituteK.E. de Visser (Author/Creator) - The Netherlands Cancer InstituteM. Kok (Author/Creator) - The Netherlands Cancer InstituteA.E. Teschendorff (Author/Creator) - Cancer Research UKS. Mook (Author/Creator) - The Netherlands Cancer InstituteL. Van't Veer (Author/Creator)C. Caldas (Author/Creator) - Cancer Research UKR.J. Salmon (Author/Creator) - Institut CurieM. Vijver (Author/Creator)L.F.A. Wessels (Author/Creator) - Delft University of Technology
- Publication Details
- Breast Cancer Research, Vol.10(6), R93
- Publisher
- BioMed Central
- Identifiers
- 991005539572707891
- Copyright
- © 2008 Reyal et al.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.119 Breast Cancer Scanning
- 1.119.259 HER2
- Web Of Science research areas
- Oncology
- ESI research areas
- Clinical Medicine