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

  • STATUS
    Recruiting
  • End date
    Sep 12, 2026
  • participants needed
    810
  • sponsor
    Sanofi
Updated on 19 February 2024
cancer
breast cancer
measurable disease
metastasis
solid tumour
palbociclib
solid tumors
letrozole
advanced breast cancer
goserelin
her2-negative breast cancer
her2/neu-negative breast cancer
HER2

Summary

Primary Objective:

To determine whether SAR439859 in combination with palbociclib improves progression free survival (PFS) when compared with letrozole in combination with palbociclib in participants with ER+, HER2- advanced breast cancer who have not received any prior systemic anticancer therapies for advanced disease.

Secondary Objective:

  • To compare the overall survival in both treatment arms
  • To evaluate the objective response rate in both treatment arms
  • To evaluate the duration of response in both treatment arms
  • To evaluate the clinical benefit rate in both treatment arms
  • To evaluate the pharmacokinetics of SAR439859, goserelin, and palbociclib
  • To evaluate health-related quality of life in both treatment arms
  • To evaluate the time to first chemotherapy in both treatment arms
  • To evaluate safety in both treatment arms

Description

Study duration per participant is approximately 57 months, which includes a 24-month treatment period

Details
Condition Breast Cancer, Breast Cancer
Age 18years - 100years
Treatment Goserelin, Letrozole, SAR439859, Letrozole-matching placebo, SAR439859-matching placebo, Ibrance
Clinical Study IdentifierNCT04478266
SponsorSanofi
Last Modified on19 February 2024

Eligibility

Yes No Not Sure

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 or non-measurable disease evaluable per Response Evaluation Criterion in Solid Tumors (RECIST) v.1.1
Eastern Cooperative Oncology Group (ECOG) performance status 0-1
Participants should be willing to provide tumor tissue
Capable of giving informed consent

Exclusion Criteria

Known brain metastases that are untreated, symptomatic or require treatment to control symptoms
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 aromatase inhibitor-containing 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
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