A Study of Sacituzumab Tirumotecan (MK-2870) as a Single Agent and in Combination With Pembrolizumab (MK-3475) Versus Treatment of Physician's Choice in Participants With HR+/HER2- Unresectable Locally Advanced or Metastatic Breast Cancer (MK-2870-010)

Study Summary

The purpose of this study is to compare sacituzumab tirumotecan as a single agent, and in combination with pembrolizumab, versus Treatment of Physician's Choice (TPC) in participants with hormone receptor positive/human epidermal growth factor receptor-2 negative (HR+/HER2-) unresectable locally advanced, or metastatic, breast cancer. The primary hypotheses are that sacituzumab tirumotecan as a single agent and sacituzumab tirumotecan plus pembrolizumab are superior to TPC with respect to progression-free survival (PFS) per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1) by blinded independent central review (BICR) in all participants.

Conditions

Breast Neoplasms

Interventions / Drugs

Sacituzumab tirumotecan Pembrolizumab Paclitaxel Nab-paclitaxel Capecitabine Liposomal doxorubicin

View on ClinicalTrials.gov ↗

Sponsor

Study Details

Enrollment1200 participants

Primary Completion—

Lead SponsorMerck Sharp & Dohme LLC

Data Retrieved2026-04-11 02:55:36.206032+00:00

Not financial advice. BiotechSigns data is sourced from ClinicalTrials.gov, SEC EDGAR, and other public databases for research and informational purposes only. It does not constitute investment recommendations. Always do your own due diligence before making investment decisions.