Enhertu granted Priority Review in the US for patients with previously treated HER2-mutant metastatic non-small cell lung cancer

Based on pivotal DESTINY-Lung01 results showing AstraZeneca and Daiichi Sankyo’s Enhertu demonstrated a 54.9% tumour response rate

If approved, Enhertu to provide patients with a much-needed targeted therapy option

AstraZeneca and Daiichi Sankyo have received notification of acceptance of the supplemental Biologics License Application (sBLA) of Enhertu (trastuzumab deruxtecan) for the treatment of adult patients in the US with unresectable or metastatic non-small cell lung cancer (NSCLC) whose tumours have a HER2(ERBB2) mutation and who have received a prior systemic therapy. The application has also been granted Priority Review.

Enhertu is a HER2directed antibody drug conjugate (ADC) being jointly developed 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 (PDUFA) date, the FDA action date for their regulatory decision, is during the third quarter of 2022. The Priority Review follows Breakthrough Therapy Designation granted by the FDA for Enhertu in this cancer type in May 2020.

Lung cancer is the second most common form of cancer globally, with more than two million new cases diagnosed in 2020.2 For patients with metastatic NSCLC, prognosis is particularly poor, as only approximately 8% will live beyond five years after diagnosis.3 There are currently no HER2-directed therapies approved specifically for the treatment of HER2-mutant NSCLC,4 which occurs in approximately 2-4% of patients with non-squamous NSCLC.4,5

Susan Galbraith, Executive Vice President, Oncology R&D, AstraZeneca, said: “The DESTINY-Lung01 trial confirmed the HER2 mutation as an actionable biomarker in non-small cell lung cancer. If approved, Enhertu has the potential to become a new standard treatment in this patient population, offering a much-needed option for patients with HER2-mutant metastatic non-small cell lung cancer who currently have no targeted treatment options.”

The sBLA is based on data from the registrational DESTINY-Lung01 Phase II trial published in The New England Journal of Medicine, and is supported by the Phase I trial (DS8201-A-J101) published in Cancer Discovery.

Primary results from previously-treated patients with HER2-mutations (cohort 2) of DESTINY-Lung01 demonstrated a confirmed objective response rate (ORR) of 54.9% (95% confidence interval [CI]: 44.2-65.4) in patients treated with Enhertu (6.4mg/kg) as assessed by independent central review (ICR). One (1.1%) complete response (CR) and 49 (53.8%) partial responses (PR) were observed.

A confirmed disease control rate (DCR) of 92.3% was seen with a reduction in tumour size observed in most patients. After a median follow-up of 13.1 months, the median duration of response (DoR) for Enhertu was 9.3 months. The median progression-free survival (PFS) was 8.2 months and the median overall survival (OS) was 17.8 months.

The safety profile of the most common adverse events with Enhertu in DESTINY-Lung01 was consistent with previous clinical trials with no new safety concerns identified.

Enhertu is being further assessed in a comprehensive clinical development programme evaluating efficacy and safety across multiple HER2-targetable cancers, including breast, gastric, lung and colorectal cancers.
Enhertu
Enhertu is a HER2-directed ADC. Designed using Daiichi Sankyo’s proprietary DXd ADC technology, Enhertu is the lead ADC in the oncology portfolio of Daiichi Sankyo and the most advanced programme in AstraZeneca’s ADC scientific platform. Enhertu consists of a HER2 monoclonal antibody attached to a topoisomerase I inhibitor payload, an exatecan derivative, via a stable tetrapeptide-based cleavable linker.

Enhertu (5.4mg/kg) is approved in more than 40 countries for the treatment of adult patients with unresectable or metastatic HER2-positive breast cancer who have received two or more prior anti-HER2-based regimens based on the results from the DESTINY-Breast01 trial.

Enhertu (6.4mg/kg) is approved in several countries for the treatment of adult patients with locally advanced or metastatic HER2-positive gastric or gastroesophageal junction (GEJ) adenocarcinoma who have received a prior trastuzumab-based regimen based on the results from the DESTINY-Gastric01 trial.
Enhertu development programme
A comprehensive development programme is underway globally, evaluating the efficacy and safety of Enhertu monotherapy across multiple HER2-targetable cancers, including breast, gastric, lung and colorectal cancers. Trials in combination with other anticancer treatments, such as immunotherapy, are also underway.

Enhertu also is currently under review in Europe for the treatment of adult patients with locally advanced or metastatic HER2-positive gastric or GEJ adenocarcinoma who have received a prior anti-HER2-based regimen based on the DESTINY-Gastric01 and DESTINY-Gastric02 trials.
AstraZeneca in lung cancer
AstraZeneca is working to bring patients with lung cancer closer to cure through the detection and treatment of early-stage disease, while also pushing the boundaries of science to improve outcomes in the resistant and advanced settings. By defining new therapeutic targets and investigating innovative approaches, the Company aims to match medicines to the patients who can benefit most.

The Company’s comprehensive portfolio includes leading lung cancer medicines and the next wave of innovations, including Tagrisso (osimertinib) and Iressa (gefitinib); Imfinzi (durvalumab) and tremelimumab; Enhertu and datopotamab deruxtecan in collaboration with Daiichi Sankyo; Orpathys (savolitinib) in collaboration with HUTCHMED; as well as a pipeline of potential new medicines and combinations across diverse mechanisms of action.

AstraZeneca is a founding member of the Lung Ambition Alliance, a global coalition working to accelerate innovation and deliver meaningful improvements for people with lung cancer, including and beyond treatment.
AstraZeneca
AstraZeneca (LSE/STO/Nasdaq: AZN) is a global, science-led biopharmaceutical company that focuses on the discovery, development, and commercialisation of prescription medicines in Oncology, Rare Diseases, and BioPharmaceuticals, including Cardiovascular, Renal & Metabolism, and Respiratory & Immunology. Based in Cambridge, UK, AstraZeneca operates in over 100 countries and its innovative medicines are used by millions of patients worldwide.

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