NCT07060807 · Merck Sharp & Dohme LLC
A Clinical Study of Patritumab Deruxtecan to Treat Breast Cancer (MK-1022-016)
What this study is about
Researchers are looking for other ways to treat breast cancer (BC) that is hormone receptor-positive and human epidermal growth factor receptor 2-negative (HR+/HER2-) and either unresectable locally advanced or metastatic.
View original scientific description
Researchers are looking for other ways to treat breast cancer (BC) that is hormone receptor-positive and human epidermal growth factor receptor 2-negative (HR+/HER2-) and either unresectable locally advanced or metastatic.
Interventions
BIOLOGICAL
Patritumab deruxtecan
Administered via intravenous (IV) infusion
DRUG
Paclitaxel
Administered via IV infusion
DRUG
Nab-paclitaxel
Administered via IV infusion
DRUG
Capecitabine
Administered via oral tablets
DRUG
Liposomal doxorubicin
Administered via IV infusion
BIOLOGICAL
Trastuzumab deruxtecan
Administered via IV infusion
Primary outcome measures
Progression Free Survival (PFS)
Time frame: Up to approximately 45 months
PFS is defined as the time from first day of study intervention to the first documented progressive disease (PD) or death due to any cause, whichever occurs first as assessed by blinded independent central review (BICR). Per Response Evaluation Criteria In Solid Tumors (RECIST) 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions is also considered PD. The appearance of one or more new lesions is also considered PD. PFS as assessed by BICR will be presented.
Overall Survival (OS)
Time frame: Up to approximately 85 months
OS is the length of time from when the participant starts treatment until death from any cause.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- The main inclusion criteria include but are not limited to the following:
- Has a diagnosis of hormone receptor positive (HR+)/human epidermal growth factor receptor 2 (HER2)- invasive breast carcinoma that is either locally advanced disease not amenable to resection with curative intent (herein called unresectable) or metastatic disease not treatable with curative intent
- Has centrally-confirmed HR+ and HER2- results and human epidermal growth factor receptor 3 (HER3) evaluable results from a biopsy obtained from a distant metastatic site on or after the most recent line of therapy (with certain exceptions)
- Must have had progression or recurrence on prior cyclin-dependent kinase (CDK)4/6 inhibitor + endocrine therapy (ET) with one of the following:
- Radiographic disease progression, as assessed by the investigator, on CDK4/6 inhibitor + ET as 1L for treatment of unresectable locally advanced or metastatic HR+/HER2- breast cancer. CDK4/6 inhibitor + ET must
Where
- Daphne, Alabama
- Tucson, Arizona
- Los Angeles, California
- Newport Beach, California
- Grand Junction, Colorado
- Newark, Delaware
- Altamonte Springs, Florida
- St. Petersburg, Florida
- Lexington, Kentucky
- Hackensack, New Jersey
- New Brunswick, New Jersey
- Albuquerque, New Mexico
And 18 more locations — see the full list below.
Collaborators
Daiichi Sankyo
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jul 10, 2026 · Source of record for eligibility and locations