Anastrozole or Fulvestrant in Treating Postmenopausal Patients With Breast Cancer

Summary

RATIONALE: Estrogen can cause the growth of breast cancer cells. Hormone therapy using anastrozole may fight breast cancer by lowering the amount of estrogen the body makes. Fulvestrant may fight breast cancer by blocking the use of estrogen by the tumor cells. Given the lack of clinical data on fulvestrant in patients with large operable or locally advanced hormone-receptor-positive breast cancer, and the potential to identify differences in the mechanism of resistance using the neoadjuvant model,we decided to perform a multicentre randomised phase II clinical trial of anastrozole and fulvestrant. PURPOSE: The aim of this study was to assess the efficacy of neoadjuvant anastrozole and fulvestrant treatment of large operable or locally advanced hormone-receptor-positive breast cancer not eligible for initial breast-conserving surgery, and to identify genomic changes occurring after treatment.

Timeline

Start

2008-03-18

Primary completion

2013-11-30

Completion

2018-07-02

Publications

• Results Quenel-Tueux N, Debled M, Rudewicz J, MacGrogan G, Pulido M, Mauriac L, Dalenc F, Bachelot T, Lortal B, Breton-Callu C, Madranges N, de Lara CT, Fournier M, Bonnefoi H, Soueidan H, Nikolski M, Gros A, Daly C, Wood H, Rabbitts P, Iggo R. Clinical and genomic analysis of a randomised phase II study evaluating anastrozole and fulvestrant in postmenopausal patients treated for large operable or locally advanced hormone-receptor-positive breast cancer. Br J Cancer. 2015 Aug 11;113(4):585-94. doi: 10.1038/bjc.2015.247. Epub 2015 Jul 14.
• Lerebours F, Pulido M, Fourme E, Debled M, Becette V, Bonnefoi H, Rivera S, MacGrogan G, Mouret-Reynier MA, de Lara CT, Pierga JY, Breton-Callu C, Venat-Bouvet L, Mathoulin-Pelissier S, de la Motte Rouge T, Dalenc F, Sigal B, Bachelot T, Lemonnier J, Quenel-Tueux N. Predictive factors of 5-year relapse-free survival in HR+/HER2- breast cancer patients treated with neoadjuvant endocrine therapy: pooled analysis of two phase 2 trials. Br J Cancer. 2020 Mar;122(6):759-765. doi: 10.1038/s41416-020-0733-x. Epub 2020 Jan 31.

Drugs

Indications