Imfinzi granted FDA Priority Review for the treatment of patients with extensive-stage small cell lung cancer

AstraZeneca today announced that the US Food and Drug Administration (FDA) has accepted a supplemental Biologics License Application (sBLA) and granted Priority Review for Imfinzi (durvalumab) for the treatment of patients with previously untreated extensive-stage small cell lung cancer (SCLC). SCLC is an aggressive, fast-growing form of lung cancer that recurs and progresses rapidly despite initial response to platinum-based chemotherapy.(1) A Prescription Drug User Fee Act date is set for the first quarter of 2020. The sBLA was based on positive results from the Phase III CASPIAN trial published in The Lancet, showing Imfinzi in combination with standard-of-care (SoC) chemotherapy (etoposide with either cisplatin or carboplatin) demonstrated a statistically significant and clinically meaningful improvement in overall survival (OS) vs. SoC. The risk of death was reduced by 27% (equal to a hazard ratio of 0.73), with median OS of 13.0 months for Imfinzi plus chemotherapy vs. 10.3 months for SoC. Results showed an estimated 33.9% of patients were alive at 18 months following treatment with Imfinzi plus chemotherapy vs. 24.7% of patients receiving SoC. Imfinzi is approved in the curative-intent setting of unresectable, Stage III non-small cell lung cancer (NSCLC) after chemoradiation therapy in 54 countries, including the US, Japan and the EU, based on the Phase III PACIFIC trial. About CASPIAN CASPIAN is a randomised, open-label, multi-centre, global, Phase III trial in the 1st-line treatment of patients with extensive-stage SCLC. The trial compared Imfinzi in combination with etoposide and either cisplatin or carboplatin chemotherapy, or Imfinzi, tremelimumab and chemotherapy vs. chemotherapy alone. In the experimental arms, patients were treated with up to four cycles of chemotherapy. In comparison, the control arm allowed up to six cycles of chemotherapy and prophylactic cranial irradiation. The trial will continue to the final analysis of OS for the combination of Imfinzi, tremelimumab and chemotherapy. The trial is being conducted in more than 200 centres across 23 countries, including the US, Europe, South America, Asia and the Middle East. The primary endpoint is OS. About small cell lung cancer Lung cancer is the leading cause of cancer death among both men and women and accounts for about one-fifth of all cancer deaths.(2) Lung cancer is broadly split into NSCLC and SCLC, with about 15% classified as SCLC.(3) About three quarters of SCLC patients are diagnosed with extensive-stage disease, in which the cancer has spread widely through the lung or to other parts of the body. Prognosis is particularly poor, as only 6% of all SCLC patients will be alive five years after diagnosis.(4) About Imfinzi Imfinzi (durvalumab) is a human monoclonal antibody that binds to PD-L1 and blocks the interaction of PD-L1 with PD-1 and CD80, countering the tumour's immune-evading tactics and releasing the inhibition of immune responses. Imfinzi is also approved for previously treated patients with advanced bladder cancer in 11 countries, including the US. As part of a broad development programme, Imfinzi is also being tested as a monotherapy and in combination with tremelimumab, an anti-CTLA4 monoclonal antibody and potential new medicine, as a treatment for patients with NSCLC, SCLC, bladder cancer, head and neck cancer, liver cancer, biliary tract cancer, cervical cancer and other solid tumours. About AstraZeneca in lung cancer AstraZeneca has a comprehensive portfolio of approved and potential new medicines in late-stage clinical development for the treatment of different forms of lung cancer spanning several stages of disease, lines of therapy and modes of action. We aim to address the unmet needs of patients with EGFR-mutated tumours as a genetic driver of disease, which occur in 10-15% of NSCLC patients in the US and EU and 30-40% of NSCLC patients in Asia, with our approved medicines Iressa (gefitinib) and Tagrisso (osimertinib), and ongoing Phase III trials ADAURA, LAURA, and FLAURA2 as well as the Phase II combination trials SAVANNAH and ORCHARD.(5-7) Our extensive late-stage Immuno-Oncology programme focuses on lung cancer patients without a targetable genetic mutation which represents approximately three-quarters of all patients with lung cancer.(8) Imfinzi, an anti-PDL1 antibody, is in development for patients with advanced disease (Phase III trials POSEIDON, PEARL, and CASPIAN) and for patients in earlier stages of disease including potentially-curative settings (Phase III trials AEGEAN, ADJUVANT BR.31, PACIFIC-2, PACIFIC-4, PACIFIC-5, and ADRIATIC) both as monotherapy and in combination with tremelimumab and/or chemotherapy. About AstraZeneca’s approach to Immuno-Oncology (IO) Immuno-oncology (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 believes that IO-based therapies offer the potential for life-changing cancer treatments for the majority of patients. 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, 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 our 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.

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