Breast Cancer Research and Treatment

, Volume 129, Issue 3, pp 767–776

Prediction of lymph node involvement in breast cancer from primary tumor tissue using gene expression profiling and miRNAs

Authors

    • Multidisciplinary Breast Centre University Hospital
  • A. Daemen
    • Department of Electrical EngineeringUniversity of Leuven
  • I. Vanden Bempt
    • Department of MicrobiologyUniversity Antwerp
  • O. Gevaert
    • Department of Electrical EngineeringUniversity of Leuven
    • Department of RadiologyStanford University School of Medicine
  • B. Claes
    • The Vesalius Research CentreVIB and University of Leuven
  • H. Wildiers
    • Multidisciplinary Breast Centre University Hospital
  • R. Drijkoningen
    • Department of PathologyJessa Hospital
  • P. Van Hummelen
    • Center for Cancer Genome Discovery (CCGD)Dana Farber Cancer Institute
  • D. Lambrechts
    • The Vesalius Research CentreVIB and University of Leuven
  • B. De Moor
    • Department of Electrical EngineeringUniversity of Leuven
  • P. Neven
    • Multidisciplinary Breast Centre University Hospital
  • C. Sotiriou
    • Department of Medical OncologyJules Bordet Institute
  • T. Vandorpe
    • Multidisciplinary Breast Centre University Hospital
  • R. Paridaens
    • Multidisciplinary Breast Centre University Hospital
  • M. R. Christiaens
    • Multidisciplinary Breast Centre University Hospital
Preclinical study

DOI: 10.1007/s10549-010-1265-5

Cite this article as:
Smeets, A., Daemen, A., Vanden Bempt, I. et al. Breast Cancer Res Treat (2011) 129: 767. doi:10.1007/s10549-010-1265-5

Abstract

The aim of this study was to investigate whether lymph node involvement in breast cancer is influenced by gene or miRNA expression of the primary tumor. For this purpose, we selected a very homogeneous patient population to minimize heterogeneity in other tumor and patient characteristics. First, we compared gene expression profiles of primary tumor tissue from a group of 96 breast cancer patients balanced for lymph node involvement using Affymetrix Human U133 Plus 2.0 microarray chip. A model was built by weighted Least-Squares Support Vector Machines and validated on an internal and external dataset. Next, miRNA profiling was performed on a subset of 82 tumors using Human MiRNA-microarray chips (Illumina). Finally, for each miRNA the number of significant inverse correlated targets was determined and compared with 1000 sets of randomly chosen targets. A model based on 241 genes was built (AUC 0.66). The AUC for the internal dataset was 0.646 and 0. 651 for the external datasets. The model includes multiple kinases, apoptosis-related, and zinc ion-binding genes. Integration of the microarray and miRNA data reveals ten miRNAs suppressing lymph node invasion and one miRNA promoting lymph node invasion. Our results provide evidence that measurable differences in gene and miRNA expression exist between node negative and node positive patients and thus that lymph node involvement is not a genetically random process. Moreover, our data suggest a general deregulation of the miRNA machinery that is potentially responsible for lymph node invasion.

Keywords

Breast cancer Microarrays miRNA Lymph node Prediction

Supplementary material

10549_2010_1265_MOESM1_ESM.xls (36 kb)
Supplementary material 1 (XLS 36 kb)
10549_2010_1265_MOESM2_ESM.xls (24 kb)
Supplementary material 2 (XLS 24 kb)

Copyright information

© Springer Science+Business Media, LLC. 2010