NCT06966700From ClinicalTrials.govRecruiting

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

A Phase 3, Randomized, Open-label Study to Evaluate the Efficacy and Safety of Sac-TMT (Sacituzumab Tirumotecan, MK-2870) Followed by Carboplatin/Paclitaxel vs Chemotherapy, Both in Combination With Pembrolizumab as Neoadjuvant Therapy for High-Risk, Early-Stage, Triple-Negative Breast Cancer or Hormone Receptor-low Positive/Human Epidermal Growth Factor Receptor-2 Negative Breast Cancer

Breast Neoplasms
Triple Negative Breast Neoplasms
HR Low-Positive/HER2-Negative Breast Neoplasms

At a glance

Phase: Phase 3
Study type: Interventional
Sponsor: Merck Sharp & Dohme LLC
Enrolment target: 2,400
Started: 30 June 2025
Main results due: 23 March 2033
Study sites: 325
Registry updated: 25 September 2026

Can you take part?

Aged 18 years and over.
Open to any sex.
You need the condition being studied — healthy volunteers are not accepted.

These are the headline rules only. Every study has a longer list, and whether you are eligible is decided by the research team at the site — never by this page.

Read the full eligibility criteria

Inclusion Criteria:

The main inclusion criteria include but are not limited to the following:

* Has previously untreated high-risk, early-stage, non-metastatic (M0) breast cancer (BC), defined as any of the following combined primary tumor (T) and regional lymph node (N) staging per AJCC 8th edition criteria as assessed by the physician investigator based on radiological and/or clinical assessment:

  * cT1c, N1-N2
  * cT2, N0-N2
  * cT3, N0-N2
  * cT4a-d, N0-N2
* The participant must have a centrally confirmed diagnosis of BC that is triple-negative or HR-low+/HER2- (defined as estrogen receptor (ER)-low+ expression in 1% to 10% cells and HER2- as by the most recent American Society of Clinical Oncology (ASCO)/College of American Pathologists (CAP) guidelines.
* Provides a core needle biopsy from the primary breast tumor at screening to the central laboratory.
* Has Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 performed within 28 days before Cycle1 Day 1 (C1D1).
* Demonstrates adequate organ function.

Exclusion Criteria:

The main exclusion criteria include but are not limited to the following:

* Metastatic (Stage IV) breast cancer or clinical node stage 3 (cN3) nodal involvement
* Has received any prior treatment, including radiation, systemic therapy,and/or definitive surgery for currently diagnosed breast cancer
* Has undergone excisional biopsy of the primary tumor, axillary lymph node dissection, and/or axillary sentinel lymph node biopsy prior to study treatment.
* Received prior systemic anticancer therapy including investigational agents within 4 weeks before C1D1.
* Received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent, or with an agent directed to another stimulatory or coinhibitory T-cell receptor (eg, CTLA-4, OX- 40, CD137).
* Received prior treatment with a TROP2-targeted antibody-drug conjugate (ADC).
* Received prior treatment with a topoisomerase I inhibitor-containing ADC.
* Received a live or live-attenuated vaccine within 30 days before the first dose of study intervention.
* Known additional malignancy that is progressing or has required active treatment within the past 5 years.
* Uncontrolled systemic disease.
* History of (noninfectious) pneumonitis/interstitial lung disease that required steroids, has current pneumonitis/interstitial lung disease or has suspected interstitial lung disease (ILD) or pneumonitis that cannot be ruled out by standard diagnostic assessments at Screening..

What this study is about

In the sponsor’s own words, from the registry.

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

Study sites(325)

Banner MD Anderson Cancer Center ( Site 0066)
Gilbert, Arizona, United States
Recruiting
Mayo Clinic Cancer Center ( Site 0034)
Phoenix, Arizona, United States
Recruiting
University of Arizona Cancer Center ( Site 0035)
Tucson, Arizona, United States
Recruiting
Roy and Patricia Disney Family Cancer Center ( Site 0055)
Burbank, California, United States
Recruiting
Community Cancer Institute ( Site 0100)
Clovis, California, United States
Recruiting
Providence Medical Foundation ( Site 0080)
Fullerton, California, United States
Recruiting
MemorialCare Health System - Long Beach Medical Center ( Site 9556)
Long Beach, California, United States
Recruiting
El Camino Hospital Cancer Center ( Site 0096)
Mountain View, California, United States
Recruiting
Hoag Memorial Hospital Presbyterian ( Site 0010)
Newport Beach, California, United States
Recruiting
Helios Clinical Research ( Site 0061)
Whittier, California, United States
Recruiting
Intermountain Health Cancer Center Saint Joseph ( Site 0062)
Denver, Colorado, United States
Recruiting
Rocky Mountain Cancer Centers (RMCC) ( Site 8006)
Denver, Colorado, United States
Recruiting
Intermountain Health St. Mary's Regional Hospital ( Site 0054)
Grand Junction, Colorado, United States
Recruiting
AdventHealth Medical Group Oncology and Hematology at Altamonte ( Site 0044)
Altamonte Springs, Florida, United States
Recruiting
Florida Cancer Specialists - South ( Site 7004)
Fort Myers, Florida, United States
Recruiting
Bioresearch Partner ( Site 0072)
Hialeah, Florida, United States
Recruiting
Mayo Clinic Hospital ( Site 0013)
Jacksonville, Florida, United States
Recruiting
Florida Cancer Specialists - North ( Site 7002)
St. Petersburg, Florida, United States
Recruiting
City of Hope Cancer Center - Atlanta ( Site 0102)
Newnan, Georgia, United States
Recruiting
Fort Wayne Medical Oncology and Hematology ( Site 0084)
Fort Wayne, Indiana, United States
Recruiting
Franciscan Health ( Site 0077)
Indianapolis, Indiana, United States
Recruiting
Ochsner Clinic Foundation ( Site 0021)
New Orleans, Louisiana, United States
Recruiting
Louisiana State University Health Sciences Shreveport ( Site 0053)
Shreveport, Louisiana, United States
Recruiting
New England Cancer Specialists ( Site 0051)
Westbrook, Maine, United States
Recruiting
Mercy Medical Center - Baltimore ( Site 0015)
Baltimore, Maryland, United States
Recruiting
Massachusetts General Hospital Cancer Center ( Site 0091)
Boston, Massachusetts, United States
Recruiting
Dana Farber Cancer Institute ( Site 0090)
Boston, Massachusetts, United States
Recruiting
Saint Luke's Cancer Institute ( Site 0059)
Kansas City, Missouri, United States
Recruiting
Washington University Siteman Cancer Center ( Site 0031)
St Louis, Missouri, United States
Recruiting
Cancer Partners of Nebraska ( Site 0068)
Lincoln, Nebraska, United States
Recruiting
Optum Care Cancer Center ( Site 0050)
Las Vegas, Nevada, United States
Recruiting
Renown Regional Medical Center ( Site 0041)
Reno, Nevada, United States
Recruiting
Hackensack Univ Medical Center (HUMC) ( Site 0007)
Hackensack, New Jersey, United States
Recruiting
Rutgers Cancer Institute of New Jersey ( Site 0076)
New Brunswick, New Jersey, United States
Recruiting
Altru Health System ( Site 0057)
Grand Forks, North Dakota, United States
Recruiting
Good Samaritan Hospital-TriHealth Cancer institute ( Site 0027)
Cincinnati, Ohio, United States
Recruiting
Northwest Cancer Specialists (Compass Oncology) ( Site 8010)
Tigard, Oregon, United States
Recruiting
Medical University of South Carolina-Hollings Cancer Center ( Site 0016)
Charleston, South Carolina, United States
Recruiting
St Francis Cancer Center ( Site 0093)
Greenville, South Carolina, United States
Recruiting
Avera McKennan Hospital ( Site 0002)
Sioux Falls, South Dakota, United States
Recruiting
Avera Cancer Institute - Yankton ( Site 0089)
Yankton, South Dakota, United States
Recruiting
Tennessee Cancer Specialists ( Site 7001)
Knoxville, Tennessee, United States
Recruiting
SCRI Oncology Partners ( Site 7005)
Nashville, Tennessee, United States
Recruiting
Nashville General Hospital ( Site 0017)
Nashville, Tennessee, United States
Recruiting
Vanderbilt-Ingram Cancer Center ( Site 0038)
Nashville, Tennessee, United States
Recruiting
Hendrick Medical Center ( Site 0009)
Abilene, Texas, United States
Recruiting
Texas Oncology - DFW ( Site 8009)
Dallas, Texas, United States
Recruiting
UT Southwestern ( Site 0092)
Dallas, Texas, United States
Recruiting
Texas Oncology - Northeast Texas ( Site 8002)
Flower Mound, Texas, United States
Recruiting
JPS Oncology and Infusion Center ( Site 0083)
Fort Worth, Texas, United States
Recruiting
Kelsey-Seybold Clinic ( Site 0042)
Houston, Texas, United States
Recruiting
Kelsey-Seybold Clinic ( Site 0088)
Houston, Texas, United States
Recruiting
Oncology Consultants P.A. ( Site 0073)
Houston, Texas, United States
Recruiting
Texas Tech University Health Sciences Center ( Site 0087)
Lubbock, Texas, United States
Recruiting
Texas Oncology - San Antonio ( Site 8004)
San Antonio, Texas, United States
Recruiting
Intermountain Medical Center ( Site 0074)
Murray, Utah, United States
Recruiting
Bon Secours Cancer Institute at St. Francis ( Site 0048)
Midlothian, Virginia, United States
Recruiting
Virginia Oncology Associates (VOA) ( Site 8008)
Norfolk, Virginia, United States
Recruiting
Oncology and Hematology Associates of Southwest Virginia (BRCC) ( Site 8005)
Roanoke, Virginia, United States
Recruiting
Fred Hutchinson Cancer Center ( Site 0069)
Seattle, Washington, United States
Recruiting

Showing 60 of 325 sites — filter to narrow it down. 322 of the 325 sites on this study are recruiting right now — a site can stop enrolling while the study as a whole is still open.

Source: ClinicalTrials.gov record NCT06966700. Trialion does not run this study, is not paid to refer anyone to it, and cannot enrol you. Eligibility is always decided by the research team at the site.

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