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Study identifier: NCT06966700 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A Clinical Study of Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in People With Breast Cancer (MK-2870-032)

Condition: Breast Neoplasms · Triple Negative Breast Neoplasms · HR Low-Positive/HER2-Negative Breast Neoplasms  ·  Sponsor: Merck Sharp & Dohme LLC

PhasePhase 3
Planned participants2400
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Researchers are looking for new ways to treat types of breast cancer that are both: * High-risk, which means the cancer may have a higher chance of getting worse or coming back after treatment * Early-stage, which means the cancer is in the breast or the lymph nodes around the breast The 2 types of breast cancer in this study are triple-negative breast cancer (TNBC) and hormone receptor (HR)-low positive/human epidermal growth factor receptor-2 (HER2) negative breast cancer. These cancers have zero or a low amount of a protein called HER2 and other proteins that attach to the hormones estrogen or progesterone. Sacituzumab tirumotecan (also known as sac-TMT or MK-2870), the study medicine, is a type of targeted therapy. A targeted therapy is a treatment that works to control how specific types of cancer cells grow and spread. The main goals of this study are to learn if people who receive sac-TMT, pembrolizumab, and chemotherapy: * Have fewer cancer cells found in the tumors and lymph nodes removed during surgery compared to those who receive only pembrolizumab and chemotherapy * Live longer without the cancer growing, spreading, or coming back compared to people who receive only pembrolizumab with chemotherapy

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

Talk to the study team

Toll Free Number  ·  1-888-577-8839  ·  Trialsites@msd.com

Always discuss trial participation with your own doctor first.

Locations (317)

Banner MD Anderson Cancer Center ( Site 0066)Gilbert, Arizona, United StatesRecruiting
Mayo Clinic Cancer Center ( Site 0034)Phoenix, Arizona, United StatesRecruiting
University of Arizona Cancer Center ( Site 0035)Tucson, Arizona, United StatesRecruiting
Roy and Patricia Disney Family Cancer Center ( Site 0055)Burbank, California, United StatesRecruiting
Community Cancer Institute ( Site 0100)Clovis, California, United StatesRecruiting
Providence Medical Foundation ( Site 0080)Fullerton, California, United StatesRecruiting
MemorialCare Health System - Long Beach Medical Center ( Site 9556)Long Beach, California, United StatesRecruiting
El Camino Hospital Cancer Center ( Site 0096)Mountain View, California, United StatesRecruiting
Hoag Memorial Hospital Presbyterian ( Site 0010)Newport Beach, California, United StatesRecruiting
Helios Clinical Research ( Site 0061)Whittier, California, United StatesRecruiting
Intermountain Health Cancer Center Saint Joseph ( Site 0062)Denver, Colorado, United StatesRecruiting
Rocky Mountain Cancer Centers (RMCC) ( Site 8006)Denver, Colorado, United StatesRecruiting

+ 305 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT06966700