Daiichi Sankyo announced that the European Medicines Agency (EMA) has validated the Type II Variation application for ENHERTU® (trastuzumab deruxtecan) as a monotherapy for treating adult patients with unresectable or metastatic HER2 low (IHC 1+ or IHC 2+/ISH-) or HER2 ultralow (IHC 0 with membrane staining) breast cancer who have previously received at least one endocrine therapy in the metastatic setting. ENHERTU, a HER2-directed DXd antibody-drug conjugate (ADC), was developed by Daiichi Sankyo in collaboration with AstraZeneca .
The validation signifies that the application is complete, initiating the EMA’s Committee for Medicinal Products for Human Use (CHMP) scientific review process. This submission is supported by data from the DESTINY-Breast06 phase 3 trial, presented during a late-breaking oral session at the 2024 American Society of Clinical Oncology (ASCO24) Annual Meeting.
“This submission extends our existing indication for ENHERTU in HER2 low metastatic breast cancer and could allow its use in an earlier disease setting, reaching a broader patient population that includes those with HER2 ultralow expression,” said Ken Takeshita, MD, Global Head of R&D at Daiichi Sankyo. The company is working closely with the EMA to potentially make this treatment available to more patients in the EU. Additional regulatory submissions for this indication are also underway globally.