Breast Cancer Research and Treatment

, 119:315

Relationship between oestrogen receptor status and proliferation in predicting response and long-term outcome to neoadjuvant chemotherapy for breast cancer

  • Robin L. Jones
  • Janine Salter
  • Roger A’Hern
  • Ash Nerurkar
  • Marina Parton
  • Jorge S. Reis-Filho
  • Ian E. Smith
  • Mitchell Dowsett
Preclinical Study

DOI: 10.1007/s10549-009-0329-x

Cite this article as:
Jones, R.L., Salter, J., A’Hern, R. et al. Breast Cancer Res Treat (2010) 119: 315. doi:10.1007/s10549-009-0329-x

Abstract

Oestrogen receptor (ER) negative breast cancers are more likely to achieve a pathological complete response (pCR) to neoadjuvant chemotherapy compared to those with ER positive tumours. ER positive tumours exhibit low proliferation and ER negative cancers high proliferation. The aim of this study was to determine to what extent the better response of ER negative cancers correlates with proliferation rate. A retrospective analysis of a prospectively maintained database identified 175 neoadjuvant chemotherapy patients with tissue available for Ki67 analysis. On univariate analysis, pre-therapy Ki67 (P = 0.04), ER status (P = 0.002), HER2 status (P = 0.004) and grade (P = 0.0009) were associated with a pCR. In a multivariate model, HER2 was the only significant predictor of pCR. No significant relationship between pre-therapy Ki67 and relapse-free and overall survival was demonstrated. Ki67 is not an independent predictor of clinical CR or pCR. Aspects of ER status beyond its inverse relationship with proliferation may contribute to its predictive value for pCR.

Keywords

Breast cancerNeoadjuvant chemotherapyProliferationERPathological complete response

Copyright information

© Springer Science+Business Media, LLC. 2009

Authors and Affiliations

  • Robin L. Jones
    • 1
  • Janine Salter
    • 1
  • Roger A’Hern
    • 1
  • Ash Nerurkar
    • 2
  • Marina Parton
    • 2
  • Jorge S. Reis-Filho
    • 3
  • Ian E. Smith
    • 2
  • Mitchell Dowsett
    • 1
  1. 1.Academic Department of BiochemistryRoyal Marsden HospitalLondonUK
  2. 2.Breast UnitRoyal Marsden HospitalLondonUK
  3. 3.Breakthrough Breast Cancer Research CentreInstitute of Cancer ResearchLondonUK