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Rare disease: Enhertu of AstraZeneca and Daiichi Sankyo now with Orphan Drug Designation in the US for treatment of gastric cancer
(PRESS RELEASE) CAMBRIDGE, 22-May-2020 — /EuropaWire/ — Enhertu, jointly developed by British-Swedish multinational pharmaceutical and biopharmaceutical company AstraZeneca and the second-largest pharmaceutical company in Japan Daiichi Sankyo (Daiichi Sankyo Company, Limited), has just been granted Orphan Drug Designation (ODD) in the US for the treatment of patients with gastric cancer, including gastroesophageal junction cancer.
An estimated 27,600 new cases of gastric cancer will be diagnosed this year and the disease could lead to more than 11,000 deaths in the US in 2020.1
The Food and Drug Administration (FDA) grants ODD to medicines intended for the treatment, diagnosis or prevention of rare diseases or disorders that affect fewer than 200,000 people in the US.
In the Phase II DESTINY-Gastric01 trial, patients with HER2-positive metastatic gastric or gastroesophageal cancer who were treated with Enhertu, a HER2-directed antibody drug conjugate (ADC), demonstrated a statistically significant and clinically meaningful improvement in objective response rate (ORR), the primary endpoint, and overall survival (OS), a key secondary endpoint, versus patients treated with investigator’s choice of chemotherapy (irinotecan or paclitaxel monotherapy).
The overall safety and tolerability profile of Enhertu (6.4mg/kg) in DESTINY-Gastric01 was consistent with that seen in the Phase I gastric cancer trial. The most common adverse events were haematologic and gastrointestinal including neutrophil count decrease, anaemia, nausea and decreased appetite. There were cases of drug-related interstitial lung disease (ILD) and pneumonitis, the majority of which were Grade 1 and 2, with two Grade 3 and one Grade 4. No Grade 5 events (ILD-related deaths) occurred in patients with gastric cancer in the Phase I trial or in the Phase II DESTINY-Gastric01 trial.
The full results of DESTINY-Gastric-01 will be presented during the 2020 American Society of Clinical Oncology ASCO20 Virtual Scientific Program, 29 to 31 May 2020.
Earlier this month, Enhertu received two Breakthrough Therapy Designations for its potential use in HER2-positive unresectable or metastatic gastric cancer and HER2-mutant metastatic non-small cell lung cancer. Enhertu also received SAKIGAKE designation from Japan’s Ministry of Health Labour and Welfare (MHLW) for potential use in HER2-positive gastric cancer in March 2018. A supplemental New Drug Application was recently submitted to the MHLW.
Gastric cancer
Gastric (stomach) cancer is the fifth most common cancer worldwide and the third leading cause of cancer mortality with a five-year survival rate of 5% for metastatic disease. There were approximately one million new cases reported in 2018 and 783,000 deaths.2,3 In the US, it is estimated that 27,600 new cases of gastric cancer will be diagnosed in 2020 and more than 11,000 people will die from the disease.1
Approximately one in five gastric cancers are HER2 positive.4,5 HER2 is a tyrosine kinase receptor growth-promoting protein expressed on the surface of many types of tumours including gastric, breast and lung cancers. Gastric cancer is usually diagnosed in the advanced stage in the US, but even when diagnosed in earlier stages of the disease the survival rate remains modest.6 Recommended 1st-line treatment for HER2-positive advanced or metastatic gastric cancer is combination chemotherapy plus trastuzumab, an anti-HER2 medicine, which has been shown to improve survival outcomes when added to chemotherapy. For gastric cancer that progresses on 1st-line treatment, there are no other approved HER2-targeted medicines.7
DESTINY-Gastric01
DESTINY-Gastric01 is a Phase II, open-label, multi-centre trial testing the safety and efficacy of Enhertu in a primary cohort of 188 patients from Japan and South Korea with HER2-expressing, advanced gastric or gastroesophageal junction adenocarcinoma (defined as IHC3+ or IHC2+/ISH+) who have progressed on two or more prior treatment regimens including fluoropyrimidine and platinum chemotherapy and trastuzumab. Patients were randomised 2:1 to receive Enhertu or investigator’s choice of chemotherapy (paclitaxel or irinotecan monotherapy). Patients were treated with Enhertu 6.4mg/kg once every three weeks or chemotherapy. The primary endpoint of the trial is ORR, as assessed by an independent review committee. Secondary endpoints include OS, progression-free survival, duration of response, disease control rate and time to treatment failure as well as pharmacokinetic and safety endpoints.8
Enhertu
Enhertu (trastuzumab deruxtecan; fam-trastuzumab deruxtecan-nxki in the US) is a HER2-directed ADC and is the lead ADC in the oncology portfolio of Daiichi Sankyo and the most advanced programme in AstraZeneca’s ADC scientific platform. ADCs are targeted cancer medicines that deliver cytotoxic chemotherapy (“payload”) to cancer cells via a linker attached to a monoclonal antibody that binds to a specific target expressed on cancer cells.
Enhertu (5.4mg/kg) is approved in the US and Japan 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 DESTINY-Breast01 trial.
Enhertu clinical development
A comprehensive development programme is underway globally with six registrational trials evaluating the efficacy and safety of Enhertu monotherapy across multiple HER2-targetable cancers including breast, gastric and lung cancers. Trials in combination with other anticancer treatments, such as immunotherapy, are also underway.
Collaboration between AstraZeneca and Daiichi Sankyo
In March 2019, AstraZeneca and Daiichi Sankyo entered into a global collaboration to jointly develop and commercialise Enhertu worldwide, except in Japan where Daiichi Sankyo maintains exclusive rights. Daiichi Sankyo is solely responsible for manufacturing and supply.
AstraZeneca in oncology
AstraZeneca has a deep-rooted heritage in oncology and offers a quickly growing portfolio of new medicines that has the potential to transform patients’ lives and the Company’s future. With six new medicines launched between 2014 and 2020, and a broad pipeline of small molecules and biologics in development, the Company is committed to advance oncology as a key growth driver for AstraZeneca focused on lung, ovarian, breast and blood cancers. In addition to AstraZeneca’s main capabilities, the Company is actively pursuing innovative partnerships and investment that accelerate the delivery of our strategy, as illustrated by the investment in Acerta Pharma in haematology.
By harnessing the power of four scientific platforms – Immuno-Oncology, Tumour Drivers and Resistance, DNA Damage Response and ADCs – and by championing the development of personalised combinations, AstraZeneca has the vision to redefine cancer treatment and, one day, eliminate cancer as a cause of death.
AstraZeneca
AstraZeneca (LSE/STO/NYSE: AZN) is a global, science-led biopharmaceutical company that focuses on the discovery, development and commercialisation of prescription medicines, primarily for the treatment of diseases in three therapy areas – Oncology, 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. Please visit astrazeneca.com and follow the Company on Twitter @AstraZeneca.
Investor and Media Contacts
For details on how to contact the Investor Relations Team, please click here. For Media contacts, click here.
References
American Cancer Society. Stomach Cancer: About Stomach Cancer. Available at: https://www.cancer.org/cancer/stomach-cancer/about/key-statistics.html.
Bray F, et al. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J. Clin. 2018; 68:394-424.
American Cancer Society. Stomach Cancer: Early Detection, Diagnosis, and Staging. Available at: https://www.cancer.org/cancer/stomach-cancer/detection-diagnosis-staging/survival-rates.html.
American Cancer Society. Stomach Cancer: Treating Stomach Cancer. Available at: https://www.cancer.org/cancer/stomach-cancer/treating/targeted-therapies.html.
Iqbal N, Iqbal N. Human Epidermal Growth Factor Receptor 2 (HER2) in Cancers: Overexpression and Therapeutic Implications. Mol Biol Int. 2014;2014:852748. doi:10.1155/2014/852748.
Curea F.G, et al. Current Targeted Therapies in HER2-Positive Gastric Adenocarcinoma. Cancer Biotherapy & Radiopharmaceuticals. 2017;32 (10).
NCCN Guidelines® Gastric Cancer. Version 4.2019. December 20, 2019: MS-22-36.
ClinicalTrials.Gov. NCT03329690. Available at: https://www.clinicaltrials.gov/ct2/show/NCT03329690.
Adrian Kemp
Company Secretary
AstraZeneca PLC
SOURCE: AstraZeneca
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