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A Phase 3 study of MK2870 with or without pembrolizumab with in patients with Metastatic Breast Cancer

An Open-label, Randomized Phase 3 Study of MK-2870 as a Single Agent and in combination with Pembrolizumab Versus Treatment of Physicianâ??s Choice in Participants with HR+/HER2- Unresectable Locally Advanced or Metastatic Breast Cancer - MK2870-010

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2024/11/076326
Enrollment
1200
Registered
2024-11-06
Start date
Unknown
Completion date
Unknown
Last updated
2025-05-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Condition 1: C50- Malignant neoplasm of breast

Interventions

Intervention1: MK-2870 (4 mg/kg): Dose: Adults, intravenous (IV), once every 2 weeks (q2w) Intervention2: Pembrolizumab (400 mg): Dose: Adults, intravenous (IV), once every 6 weeks (q6w) Control Inte

Sponsors

Merck Sharp Dohme LLC a subsidiary of Merck and Co Inc
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: Is an individual of any sex/gender, from at least 18 years of age at the time of providing the informed consent. Has unresectable locally advanced or metastatic centrally-confirmed hormone receptor positive (HR+)/human epidermal growth factor receptor 2 negative (HER2-) breast cancer Has radiographic disease progression on one or more lines of endocrine therapy for unresectable locally advanced/metastatic HR+/HER2- breast cancer, with one in combination with a CDK4/6 inhibitor Is a chemotherapy candidate Has an eastern cooperative oncology group (ECOG) performance status of 0 to 1 assessed within 7 days before randomization Has adequate organ function Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on antiretroviral therapy Participants who are Hepatitis B surface antigen (HBsAg) positive are eligible if they have received HBV antiviral therapy for at least 4 weeks, and have undetectable HBV viral load Participants with a history of Hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable

Exclusion criteria

Exclusion criteria: Has breast cancer amenable to treatment with curative intent Has symptomatic advanced/metastatic visceral spread at risk of rapidly evolving into life-threatening complications Has received prior chemotherapy for unresectable locally advanced or metastatic breast cancer Active autoimmune disease that has required systemic treatment in the past 2 years History of (noninfectious) pneumonitis/interstitial lung disease that requires steroids, or has current pneumonitis/interstitial lung disease Has breast cancer amenable to treatment with curative intent Has symptomatic advanced/metastatic visceral spread at risk of rapidly evolving into life-threatening complications Has received prior chemotherapy for unresectable locally advanced or metastatic breast cancer Active autoimmune disease that has required systemic treatment in the past 2 years History of (noninfectious) pneumonitis/interstitial lung disease that requires steroids, or has current pneumonitis/interstitial lung disease

Design outcomes

Primary

MeasureTime frame
Progression-Free Survival PFS sacituzumab tirumotecan versus treatment of physicians choice TPC pembrolizumab + sacituzumab tirumotecan versus TPCTimepoint: From time of signing the informed consent form

Secondary

MeasureTime frame
Change from baseline in physical functioning score, on the EORTC QLQ-C30Timepoint: Baseline & upto 77 months;Overall SurvivalTimepoint: upto 77 months;Objective Response RateTimepoint: Up to 57 months;Progression-Free Survival PFS sacituzumab tirumotecan versus treatment of physicians choice TPC pembrolizumab + sacituzumab tirumotecan versus TPCTimepoint: Up to 57 months;Duration of Response (DOR)Timepoint: Up to 57 months;Change from baseline in physical functioning score, on the EORTC QLQ-C30 Timepoint: Baseline & upto 77 months;Change from baseline in emotional functioning score, on the EORTC QLQ-C30Timepoint: upto 77 months;Change from baseline in fatigue score, on the EORTC QLQ-C30Timepoint: Baseline & upto 77 months;Change from baseline in diarrhea score, on the EORTC QLQ-C30Timepoint: Baseline & upto 77 months;Time to first Deterioration (TTD) in global health status/quality of life scores, on the EORTC QLQ-C30Timepoint: upto 77 months;TTD in physical functioning score, on the EORTC QLQ-C30Timepoint: upto 77 months;TTD in emotional functioning score, on the EORTC QLQ-C30Timepoint: upto 77 months;TTD in fatigue score, on the EORTC QLQ-C30Timepoint: upto 77 months;TTD in diarrhea score, on the EORTC QLQ-C30Timepoint: upto 77 months;Number of participants who experience one or more adverse events (AEs)Timepoint: upto 77 months;Number of participants who discontinue study treatment due to an AETimepoint: Up to 77 months

Countries

Argentina, Australia, Belgium, Brazil, Chile, China, Colombia, Costa Rica, Czech Republic, Denmark, Finland, France, Germany, Greece, Guatemala, Hong Kong, Hungary, India, Ireland, Israel, Italy, Japan, Malaysia, Mexico, Netherlands, New Zealand, Peru, Philippines, Poland, Portugal, Republic of Korea, Romania, Singapore, South Africa, Spain, Sweden, Switzerland, Taiwan, Turkey, United Kingdom, United States of America

Contacts

Public ContactDr Monisha Sharma

MSD Pharmaceuticals Pvt Ltd

monisha_sharma@merck.com01244647300

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026