Gene expression profiling predicts clinical outcome of breast cancer

Nature
Laura J van 't VeerStephen H Friend

Abstract

Breast cancer patients with the same stage of disease can have markedly different treatment responses and overall outcome. The strongest predictors for metastases (for example, lymph node status and histological grade) fail to classify accurately breast tumours according to their clinical behaviour. Chemotherapy or hormonal therapy reduces the risk of distant metastases by approximately one-third; however, 70-80% of patients receiving this treatment would have survived without it. None of the signatures of breast cancer gene expression reported to date allow for patient-tailored therapy strategies. Here we used DNA microarray analysis on primary breast tumours of 117 young patients, and applied supervised classification to identify a gene expression signature strongly predictive of a short interval to distant metastases ('poor prognosis' signature) in patients without tumour cells in local lymph nodes at diagnosis (lymph node negative). In addition, we established a signature that identifies tumours of BRCA1 carriers. The poor prognosis signature consists of genes regulating cell cycle, invasion, metastasis and angiogenesis. This gene expression profile will outperform all currently used clinical parameters in predicting diseas...Continue Reading

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Related Concepts

Tumor Cells, Uncertain Whether Benign or Malignant
Microarray Analysis
DNA Microarray Format
Angiogenic Process
Immunologic Adjuvants
Adjuvant
Neoplasms
Tumor Lysis Syndrome
Tumor Angiogenesis
DNA, Neoplasm

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