Sac-TMT (sacituzumab tirumotecan; also known as SKB264/MK-2870) is a human TROP2-directed antibody-drug conjugate targeting advanced solid tumors. Corporate regulatory disclosures report four approved and marketed indications in China and ongoing global Phase 3 development programs led by MSD. The ADC delivers a belotecan-derivative topoisomerase I inhibitor payload after TROP2-mediated internalization.
FDA approves AstraZeneca and Daiichi Sankyo's Datroway for first-line TNBC patients not eligible for PD-1/L1 inhibitors, based on Phase III TROPION-Breast02 data showing a 21% reduction in risk of death versus chemotherapy.
MSD said sacituzumab tirumotecan improved overall survival and progression-free survival in the Phase III TroFuse-005 trial in endometrial cancer. The study also met its objective response rate endpoint.
The antibody-drug conjugate sacituzumab tirumotecan demonstrated significant survival benefits in pretreated EGFR-mutated NSCLC, with median overall survival of 20.0 months versus 13.5 months for docetaxel. The treatment also showed superior progression-free survival and objective response rates with a favorable safety profile compared to chemotherapy.
Sacituzumab tirumotecan demonstrated a median overall survival of 20.0 months versus 13.5 months with docetaxel in pretreated EGFR-mutated NSCLC patients. The phase 2 OptiTROP-Lung03 study showed a hazard ratio of 0.63 for overall survival benefit with the TROP2-directed antibody-drug conjugate.
Kelun-Biotech reported 2025 revenue of RMB2.06 billion with four products now marketed in China. The company's TROP2 ADC received multiple regulatory approvals for breast and lung cancer indications. A Phase 3 trial combining the ADC with pembrolizumab met its primary endpoint in first-line NSCLC treatment.
Merck announced multiple data presentations at the 2026 ASCO GU Cancers Symposium, including results from trials evaluating pembrolizumab combinations in muscle-invasive bladder cancer and renal cell carcinoma.
Merck is diversifying its oncology pipeline beyond Keytruda as the blockbuster approaches patent cliffs, focusing on immune modulating therapies, antibody-drug conjugates, and tumor intrinsic treatments through strategic acquisitions and partnerships.
| NCT ID | Title | Status | Phase |
|---|---|---|---|
| NCT07077564 |
The Efficacy of TROP2-ADC in Advanced Extrapulmonary High-Grade Neuroendocrine Neoplasms Failure of Standard Therapy |
NOT_YET_RECRUITING | PHASE2 |
| NCT06422143 |
Pembrolizumab With or Without Maintenance Sacituzumab Tirumotecan (Sac-TMT; MK-2870) in Metastatic Squamous Non-small Cell Lung Cancer (NSCLC) [MK-2870-023] |
RECRUITING | PHASE3 |
