AstraZeneca and Daiichi Sankyo’s supplemental Biologics License Application (sBLA) for Enhertu (trastuzumab deruxtecan) has been accepted and granted Priority Review in the US for the treatment of adult patients with unresectable or metastatic HER2-positive (immunohistochemistry [IHC] 3+) solid tumours who have received prior treatment or who have no satisfactory alternative treatment options.
The sBLA is based on data from the ongoing DESTINY-PanTumor02 Phase II trial where Enhertu demonstrated clinically meaningful and durable responses leading to a clinically meaningful survival benefit in previously treated patients across HER2-expressing metastatic solid tumours, including biliary tract, bladder, cervical, endometrial, ovarian cancers, and other tumours. Data from other supporting trials in patients with HER2-positive IHC3+ tumours in the Enhertu clinical development programme, including DESTINY-Lung01 and DESTINY-CRC02, were also included in the submission.
Enhertu is a specifically engineered HER2-directed antibody drug conjugate (ADC) being jointly developed and commercialised by AstraZeneca and Daiichi Sankyo.
The Food and Drug Administration (FDA) grants Priority Review to applications for medicines that, if approved, would offer significant improvements over available options by demonstrating safety or efficacy improvements, preventing serious conditions or enhancing patient compliance.1 The Prescription Drug User Fee Act date, the FDA action date for their regulatory decision, is during the second quarter of 2024.
Susan Galbraith, Executive Vice President, Oncology R&D, AstraZeneca, said: “Today’s Priority Review for the first tumour-agnostic submission for Enhertu reflects the potential of this medicine to redefine the treatment of HER2-expressing cancers. Biomarkers for HER2 expression are already established in breast and gastric cancers, but we must now define them across tumour types. We will continue working closely with the FDA to bring this potential first tumour-agnostic HER2-targeted medicine and biomarker to patients as quickly as possible.”
