Official Title: Prevention of Breast Cancer by Letrozole in Post-menopausal Women Carrying a BRCA1BRCA2 Mutation
Status: COMPLETED
Status Verified Date: 2024-06
Last Known Status: None
Delayed Posting: No
If Stopped, Why?: Not Stopped
Has Expanded Access: False
If Expanded Access, NCT#: N/A
Has Expanded Access, NCT# Status: N/A
Acronym: LIBER
Brief Summary: RATIONALE Letrozole may prevent breast cancer in postmenopausal women with a BRCA1 or BRCA2 mutation
PURPOSE This randomized phase III trial is studying letrozole to see how well it works compared with a placebo in preventing breast cancer in postmenopausal women with a BRCA1 or BRCA2 mutation
Detailed Description: OBJECTIVES
Primary
Evaluate the reduction of the incidence of invasive breast cancer in postmenopausal women with the BRCA1BRCA2 mutation treated with letrozole
Secondary
Determine the reduction of the incidence of in situ breast cancer in these women Determine the recurrence rate of local or metastatic disease in women who have had breast cancer Determine the incidence of non-breast cancer especially ovarian colon or endometrial cancer Assess the tolerance of this drug in terms of lipid cardiovascular and bone effects Determine the quality of life of women treated with this drug Identify serological markers that allow early diagnosis of hereditary predisposition for breast cancer Conduct pharmacogenetic analysis Identify biomarkers or genes involved in the occurrence of cardiovascular and rheumatologic metabolic aromatase inhibitors Study the phenotypic characteristics of cancers that occur during treatment with letrozole in particular hormonal markers estrogen and progesterone receptor and expression profiles of resistance to therapy
OUTLINE This is a multicenter study Patients are stratified according to nature of mutation BRCA1 vs BRCA2 oophorectomy in premenopausal state yes vs no and prior breast cancer yes vs no Patients are randomized to 1 of 2 treatment arms
Arm I Patients receive oral letrozole once daily Arm II Patients receive oral placebo once daily Treatment in both arms continues for 5 years in the absence of unacceptable toxicity or development of cancer or recurrent disease
Blood samples are collected periodically for pharmacogenetic studies and analysis of biomarkers or genes associated with hereditary predisposition for breast cancer toxicities and resistance to therapy
After completion of study treatment patients are followed for 5 years