AstraZeneca’s Imfinzi (durvalumab) has been approved in the European Union for the first-line treatment of adults with extensive-stage small cell lung cancer (ES-SCLC) in combination with a choice of chemotherapies, etoposide plus either carboplatin or cisplatin.
SCLC is a highly aggressive, fast-growing form of lung cancer that typically recurs and progresses rapidly despite initial response to chemotherapy.
The approval by the European Commission was based on positive results from the Phase III CASPIAN trial showing Imfinzi plus chemotherapy demonstrated a statistically significant and clinically meaningful overall survival (OS) benefit for the first-line treatment of patients with ES-SCLC. It follows the recommendation for approval by the Committee for Medicinal Products for Human Use of the European Medicines Agency in July 2020.
Luis Paz-Ares MD, Chair, Medical Oncology Department, Hospital Universitario Doce de Octubre, Madrid, Spain and principal investigator in the Phase III CASPIAN trial said, “For the first time, patients with extensive-stage small cell lung cancer in Europe will have the option of an immunotherapy combination with cisplatin, a preferred chemotherapy for many European physicians in this setting. Today’s approval of Imfinzi provides physicians with an important new 1st-line treatment option that provides significant overall survival benefit with a well-tolerated treatment.”
Dave Fredrickson, Executive Vice President, Oncology Business Unit, said, “Imfinzi plus chemotherapy is becoming a new global standard of care for patients with extensive-stage small cell lung cancer, and we are pleased to bring this option to patients in Europe who urgently need it. This is the first immunotherapy regimen to offer both a sustained survival benefit and an improved response rate, as well as a choice of chemotherapies and convenient dosing every four weeks during maintenance.”
The CASPIAN trial met the primary endpoint of OS for Imfinzi plus chemotherapy in June 2019, reducing the risk of death by 27 per cent versus chemotherapy alone (based on a hazard ratio [HR] of 0.73; 95 per cent confidence interval [CI] 0.59-0.91; p=0.0047), with median OS of 13.0 months versus 10.3 months for chemotherapy alone. These results were published in The Lancet in 2019.3 Results also showed an increased confirmed objective response rate for Imfinzi plus chemotherapy (68 per cent versus 58 per cent for chemotherapy alone) and that Imfinzi added to chemotherapy delayed the time for disease symptoms to worsen.
An updated analysis recently showed sustained efficacy for Imfinzi plus chemotherapy after a median follow up of more than two years (OS HR: 0.75; 95% CI 0.62-0.91; nominal p=0.0032), with median OS of 12.9 months versus 10.5 months for chemotherapy alone. The safety and tolerability for Imfinzi plus chemotherapy were consistent with the known safety profile of these medicines. No patients tested positive for treatment-emergent anti-drug antibodies to Imfinzi.
The CASPIAN trial used a fixed dose of?Imfinzi?(1500mg) administered every three weeks for four cycles while in combination with chemotherapy and then every four weeks until disease progression.
Imfinzi in combination with etoposide and either carboplatin or cisplatin is also approved in the US, Japan and several other countries for the treatment of ES-SCLC in the first-line setting and is currently under regulatory review in other countries.
As part of a broad development programme, Imfinzi is also being tested following concurrent chemoradiation therapy in patients with limited-stage SCLC in the Phase III ADRIATIC trial.
AstraZeneca in lung cancer
AstraZeneca has a comprehensive portfolio of approved and potential new medicines in late-stage development for the treatment of different forms of lung cancer spanning different histologies, several stages of disease, lines of therapy and modes of action.
An extensive Immuno-Oncology (IO) development programme focuses on lung cancer patients without a targetable genetic mutation, which represent up to three quarters of all patients with lung cancer.7 Imfinzi, an anti-PDL1 antibody, is in development for patients with advanced disease (Phase III trials POSEIDON and PEARL) and for patients in earlier stages of disease, including potentially-curative settings (Phase III trials MERMAID-1, AEGEAN, ADJUVANT BR.31, PACIFIC-2, PACIFIC-4, PACIFIC-5, and ADRIATIC) both as monotherapy and in combination with tremelimumab and/or chemotherapy. Imfinzi is also in development in the Phase II trials NeoCOAST, COAST and HUDSON in combination with potential new medicines from the early-stage pipeline, including Enhertu.
AstraZeneca’s approach to IO
IO is a therapeutic approach designed to stimulate the body’s immune system to attack tumours. The Company’s IO portfolio is anchored by immunotherapies that have been designed to overcome anti-tumour immune suppression. AstraZeneca is invested in using IO approaches that deliver long-term survival for new groups of patients across tumour types.
The Company is pursuing a comprehensive clinical-trial programme that includes Imfinzi as a monotherapy and in combination with tremelimumab in multiple tumour types, stages of disease, and lines of therapy, and where relevant using the PD-L1 biomarker as a decision-making tool to define the best potential treatment path for a patient. In addition, the ability to combine the IO portfolio with radiation, chemotherapy, small targeted molecules from across AstraZeneca’s Oncology pipeline, and from research partners, may provide new treatment options across a broad range of tumours.
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 seven 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.
By harnessing the power of four scientific platforms – Immuno-Oncology, Tumour Drivers and Resistance, DNA Damage Response and Antibody Drug Conjugates – 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 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.
