Human Gene Set: WANG_METASTASIS_OF_BREAST_CANCER


Standard name WANG_METASTASIS_OF_BREAST_CANCER
Systematic name M2084
Brief description Genes whose expression in primary ER(-) [GeneID=2099] breast cancer tumors negatively correlates with developing distant metastases.
Full description or abstract BACKGROUND: Genome-wide measures of gene expression can identify patterns of gene activity that subclassify tumours and might provide a better means than is currently available for individual risk assessment in patients with lymph-node-negative breast cancer. METHODS: We analysed, with Affymetrix Human U133a GeneChips, the expression of 22000 transcripts from total RNA of frozen tumour samples from 286 lymph-node-negative patients who had not received adjuvant systemic treatment. FINDINGS: In a training set of 115 tumours, we identified a 76-gene signature consisting of 60 genes for patients positive for oestrogen receptors (ER) and 16 genes for ER-negative patients. This signature showed 93% sensitivity and 48% specificity in a subsequent independent testing set of 171 lymph-node-negative patients. The gene profile was highly informative in identifying patients who developed distant metastases within 5 years (hazard ratio 5.67 [95% CI 2.59-12.4]), even when corrected for traditional prognostic factors in multivariate analysis (5.55 [2.46-12.5]). The 76-gene profile also represented a strong prognostic factor for the development of metastasis in the subgroups of 84 premenopausal patients (9.60 [2.28-40.5]), 87 postmenopausal patients (4.04 [1.57-10.4]), and 79 patients with tumours of 10-20 mm (14.1 [3.34-59.2]), a group of patients for whom prediction of prognosis is especially difficult. INTERPRETATION: The identified signature provides a powerful tool for identification of patients at high risk of distant recurrence. The ability to identify patients who have a favourable prognosis could, after independent confirmation, allow clinicians to avoid adjuvant systemic therapy or to choose less aggressive therapeutic options.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 15721472   Authors: Wang Y,Klijn JG,Zhang Y,Sieuwerts AM,Look MP,Yang F,Talantov D,Timmermans M,Meijer-van Gelder ME,Yu J,Jatkoe T,Berns EM,Atkins D,Foekens JA
Exact source Table 2: ER-negative group, Cox < 0
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Source species Homo sapiens
Contributed by Arthur Liberzon (MSigDB Team)
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identifier namespace		 AFFY_HG_U133
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Version history 3.1: First introduced

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