On March 9, 2023 AstraZeneca reported Positive high-level results from a planned interim analysis of the AEGEAN Phase III, placebo- controlled trial showed that treatment with Imfinzi (durvalumab) in combination with neoadjuvant chemotherapy before surgery and as adjuvant monotherapy after surgery demonstrated a statistically significant and clinically meaningful improvement in event-free survival (EFS) versus neoadjuvant chemotherapy alone followed by surgery for patients with resectable early-stage (IIA-IIIB) non-small cell lung cancer (NSCLC) (Press release, AstraZeneca, MAR 9, 2023, View Source [SID1234628457]).
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Results from the final pathologic complete response (pCR) and major pathologic response (mPR) analyses were consistent with previously announced positive results. The trial will continue as planned to assess key secondary endpoints including disease-free survival (DFS) and overall survival (OS).
Each year there are an estimated 2.2 million people diagnosed with lung cancer globally with 80-85% of patients diagnosed with NSCLC, the most common form of lung cancer.1-3 Approximately 25-30% of all patients with NSCLC are diagnosed early enough to have surgery with curative intent.4-5 However, only around 56-65% of patients with Stage II disease will survive for five years.6 This decreases to 41% for patients with Stage IIIA and 24% for patients with Stage IIIB disease, reflecting a high unmet medical need.6
John V. Heymach, MD, PhD. Professor and Chair Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, said: "Treating patients early with durvalumab both before and after surgery delivers a significant and clinically meaningful benefit in resectable non-small cell lung cancer, where new options are urgently needed to offer patients the best chance of long-term survival. The AEGEAN results provide compelling evidence that this novel durvalumab regimen can drive improved outcomes in this curative-intent setting."
Susan Galbraith, Executive Vice President, Oncology R&D, AstraZeneca, said: "Patients with resectable non-small cell lung cancer face unacceptably high rates of recurrence, despite treatment with chemotherapy and surgery. We have shown that adding Imfinzi both before and after surgery significantly increased the time patients live without recurrence or progression events. We will continue to follow patients for overall survival."
Imfinzi was well tolerated and no new safety concerns were observed in the neoadjuvant and adjuvant settings. Further, adding Imfinzi to neoadjuvant chemotherapy was consistent with the known profile for this combination and did not increase complications or adverse events, or compromise patients’ ability to undergo surgery versus chemotherapy alone.
These data will be presented at a forthcoming medical meeting and shared with global health authorities.
AstraZeneca has a comprehensive portfolio of approved and potential new medicines in development for patients with lung cancer. In addition to these results, the Company is also announcing today that Tagrisso (osimertinib) met a secondary endpoint of OS in the ADAURA Phase III trial in early-stage (IB, II and IIIA) epidermal growth factor receptor-mutated (EGFRm) NSCLC after complete tumour resection with curative intent.
Notes
Lung cancer
Lung cancer is the leading cause of cancer death among both men and women, accounting for about one-fifth of all cancer deaths.1 Lung cancer is broadly split into NSCLC and small cell lung cancer (SCLC).2 The majority of NSCLC patients are diagnosed with advanced disease while approximately 25-30% present with resectable disease at diagnosis.4-5 Early-stage lung cancer diagnoses are often only made when the cancer is found on imaging for an unrelated condition.7-8
For patients with resectable tumours, the majority eventually develop recurrence despite complete tumour resection and adjuvant chemotherapy.9
AEGEAN
AEGEAN is a randomised, double-blind, multi-centre, placebo-controlled global Phase III trial evaluating Imfinzi as perioperative treatment for patients with resectable Stage IIA-IIIB (Eighth Edition AJCC Cancer Staging Manual) NSCLC, irrespective of PD-L1 expression. Perioperative therapy includes treatment before and after surgery, also known as neoadjuvant/adjuvant therapy. In the trial, 802 patients were randomised to receive a 1500mg fixed dose of Imfinzi plus chemotherapy or placebo plus chemotherapy every three weeks for four cycles prior to surgery, followed by Imfinzi or placebo every four weeks (for up to 12 cycles) after surgery. Patients with known EGFR or ALK genomic tumour aberrations were excluded from the primary efficacy analyses.
In the AEGEAN trial, the primary endpoints were pCR, defined as no viable tumour in the resection specimen (including lymph nodes) following neoadjuvant therapy, and EFS, defined as the time from randomisation to an event like tumour recurrence, progression precluding definitive surgery, or death. Key secondary endpoints were mPR, defined as residual viable tumour of less than or equal to 10% in the resected primary tumour following neoadjuvant therapy, DFS, OS, safety and quality of life. The final pathologic response analyses were performed after all patients had the opportunity for surgery and pathology assessment per the trial protocol. The trial enrolled participants in 264 centres in more than 25 countries including in the US, Canada, Europe, South America and Asia.
Imfinzi
Imfinzi (durvalumab) is a human monoclonal antibody that binds to the PD-L1 protein and blocks the interaction of PD-L1 with the PD-1 and CD80 proteins, countering the tumour’s immune-evading tactics and releasing the inhibition of immune responses.
Imfinzi is the only approved immunotherapy and the global standard of care in the curative-intent setting of unresectable, Stage III NSCLC in patients whose disease has not progressed after chemoradiation therapy based on the PACIFIC Phase III trial.
Imfinzi is also approved in the US, EU, Japan, China and many other countries around the world for the treatment of extensive-stage SCLC based on the CASPIAN Phase III trial. In an exploratory analysis in 2021, updated results from the CASPIAN trial showed Imfinzi plus chemotherapy tripled patient survival at three years versus chemotherapy alone. Additionally, Imfinzi is approved in combination with a short course of Imjudo (tremelimumab) and chemotherapy for the treatment of metastatic NSCLC in the US, EU and Japan based on the POSEIDON Phase III trial.
In addition to its indications in lung cancer, Imfinzi is also approved in combination with chemotherapy in locally advanced or metastatic biliary tract cancer in the US, EU, Japan and several other countries; in combination with Imjudo in unresectable hepatocellular carcinoma in the US, EU and Japan; and in previously treated patients with advanced bladder cancer in several countries.
Since the first approval in May 2017, more than 150,000 patients have been treated with Imfinzi.
AstraZeneca has several ongoing registrational trials focused on testing Imfinzi in earlier stages of lung cancer, including in resectable NSCLC (ADJUVANT BR.31) and unresectable NSCLC (PACIFIC-2, 4, 5, 8 and 9), and in limited-stage SCLC (ADRIATIC).
As part of a broad development programme, Imfinzi is being tested as a single treatment and in combinations with other anti-cancer treatments for patients with SCLC, NSCLC, bladder cancer, several gastrointestinal (GI) cancers, ovarian cancer, endometrial cancer and other solid tumours.