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Study identifier: NCT04802759 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

A Study Evaluating the Efficacy and Safety of Multiple Treatment Combinations in Participants With Breast Cancer

Condition: Inoperable, Locally Advanced or Metastatic, ER-positive Breast Cancer  ·  Sponsor: Hoffmann-La Roche

PhasePhase 1/Phase 2
Planned participants316
Who can joinFemale, 18 Years to no upper limit
Healthy volunteersNo

About this study

This is a Phase Ib/II, open-label, multicenter, randomized umbrella study in participants with breast cancer. The study is designed with the flexibility to open new treatment arms as new treatments become available, close existing treatment arms that demonstrate minimal clinical activity or unacceptable toxicity, or modify the patient population. Cohort 1 will focus on participants with inoperable, locally advanced or metastatic, estrogen receptor-positive (ER+), HER2-negative breast cancer who had disease progression during or following treatment with a cyclin-dependent kinase 4/6 inhibitor (CDK4/6i; e.g., palbociclib, ribociclib, abemaciclib) in the first- or second-line setting. Cohort 2 will focus on inoperable, locally advanced or metastatic, ER+, HER2-positive breast cancer with previous progression to standard-of-care anti-HER2 therapies, of which one was a trastuzumab-and-taxane-based systemic therapy (including in the early setting if recurrence occurred within 6 months of finishing adjuvant therapy) and one was a HER2-targeting antibody-drug conjugate (ADC; e.g., ado-trastuzumab emtansine or trastuzumab-deruxtecan) or a HER2-targeting tyrosine kinase inhibitor (TKI; e.g., tucatinib, lapatinib, pyrotinib, or neratinib). Cohort 3 will focus on inoperable, locally advanced or metastatic, ER+, HER2-negative, PIK3CA-mutated breast cancer with resistance to adjuvant endocrine therapy.

This description comes directly from the study's public registry record.

Talk to the study team

Reference Study ID Number: CO42867 https://forpatients.roche.com/ No attachments to email below.  ·  888-662-6728 (U.S. Only)  ·  global-roche-genentech-trials@gene.com

Fastest response: use the inquiry form. https://www.gene.com/contact-us/submit-medical-inquiry

Always discuss trial participation with your own doctor first.

Locations (32)

City of HopeDuarte, California, United StatesRecruiting
City of Hope - Orange County Lennar Foundation Cancer CenterIrvine, California, United StatesRecruiting
University of California, San Francisco (UCSF)San Francisco, California, United StatesRecruiting
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical CenterSanta Monica, California, United StatesRecruiting
Stanford Cancer Institute (SCI)Stanford, California, United StatesRecruiting
Massachusetts General HospitalBoston, Massachusetts, United StatesRecruiting
Regional Cancer Care Associates LLC (RCCA) - Freehold LocationFreehold, New Jersey, United StatesWithdrawn
Regional Cancer Care Associates LLC ? Howell DivisionHowell Township, New Jersey, United StatesWithdrawn
Levine Cancer InstituteCharlotte, North Carolina, United StatesRecruiting
Thomas Jefferson University HospitalPhiladelphia, Pennsylvania, United StatesRecruiting
University of Pittsburgh Cancer InstitutePittsburgh, Pennsylvania, United StatesWithdrawn
West Cancer CenterGermantown, Tennessee, United StatesRecruiting

+ 20 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT04802759