Amcenestrant (SAR439859) Plus Palbociclib as First Line Therapy for Patients With ER (+) HER2(-) Advanced Breast Cancer (AMEERA-5)
Breast Cancer

About this trial
This is an interventional treatment trial for Breast Cancer
Eligibility Criteria
Inclusion criteria :
- Adult participants with loco-regional recurrent or metastatic disease not amenable to curative treatment
- Confirmed diagnosis of ER+/HER2- breast cancer
- No prior systemic treatment for loco-regional recurrent or metastatic disease
- Measurable disease evaluable per Response Evaluation Criterion in Solid Tumors (RECIST) v.1.1 or non-measurable bone-only disease
- Eastern Cooperative Oncology Group (ECOG) performance status 0-2
- Participants should be willing to provide tumor tissue
- Capable of giving informed consent
Exclusion criteria:
- Known active brain metastases
- Prior neo (adjuvant) treatment with any selective estrogen receptor degrader (SERD)
- Inadequate organ and marrow function
- Disease recurrence while on, or within 12 months of completion of (neo)adjuvant endocrine therapy
- Pregnant, breastfeeding, or woman of child bearing potential unwilling to use recommended contraception methods
- Male participants who disagree to follow contraception
- Participants with advanced, symptomatic visceral spread, that are at risk of life-threatening complications in the short term
- Participants with significant concomitant illness
The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.
Sites / Locations
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Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Amcenestrant with Letrozole-matching placebo Arm
Letrozole with Amcenestrant matching placebo Arm
Participants in Amcenestrant with Letrozole-matching placebo Arm will be administered: Amcenestrant dose, once daily, continuously. Letrozole-matching placebo, once daily, continuously. Palbociclib dose once daily, days 1-21 of every 28-day cycle. Goserelin once every 4 weeks in pre/peri menopausal women and men
Participants in Letrozole with Amcenestrant-matching placebo Arm will be administered: Letrozole dose, once daily, continuously. Amcenestrant-matching placebo, once daily, continuously. Palbociclib dose once daily, days 1-21 of every 28-day cycle Goserelin once every 4 weeks in pre/peri menopausal women and men