On April !3, 2018 AstraZeneca reported that presented new post-progression outcomes data from an exploratory analysis of the global Phase III FLAURA trial, which assessed the efficacy and safety of Tagrisso (osimertinib) as 1st-line therapy in patients with locally advanced or metastatic epidermal growth factor receptor (EGFR) mutation-positive non-small cell lung cancer (NSCLC) (Press release, AstraZeneca, APR 13, 2018, View Source [SID1234525369]). The presentation at the European Lung Cancer Conference (ELCC) in Geneva during the "Best of ELCC" session showed that the progression-free survival (PFS) benefit of 1st-line Tagrisso over the EGFR tyrosine kinase inhibitors (TKIs), erlotinib or gefitinib, was sustained throughout post-progression outcomes [Abstract #128O].

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Sean Bohen, Executive Vice President, Global Medicines Development and Chief Medical Officer at AstraZeneca, said: "The new analysis from the FLAURA trial shows that 1st-line treatment with Tagrisso has a sustained effect beyond subsequent therapy by almost halving the risk of a second progression or death. These findings build on the clinically-meaningful PFS benefit of Tagrisso and reinforce its potential as a new standard of care.
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At the time of data cut-off, fewer patients on 1st-line Tagrisso had discontinued treatment compared to patients on the EGFR-TKI comparator arm (49% vs. 77%) and 29% received a subsequent treatment compared to 46% on the comparator arm. Median time to first subsequent therapy or death was 23.5 months (95% confidence interval [CI] 22.0, NC) for those treated with 1st-line Tagrisso vs. 13.8 months (95% CI 12.3, 15.7) for patients on erlotinib or gefitinib (hazard ratio [HR] 0.51, 95% CI 0.40, 0.64, p<0.0001).

Patients treated with 1st-line Tagrisso experienced a longer time before discontinuation of EGFR-TKI therapy (median 23.0 months (95% CI 19.5, NC), compared to a median of 16.0 months (95% CI 14.8, 18.6) for comparator arm patients, which included patients who had crossed over to Tagrisso in the 2nd line. 1st-line Tagrisso patients had almost half the risk of second progression or death (PFS2) compared to the comparator arm (HR 0.58, 95% CI 0.44, 0.78, p<0.001).

Dr. David Planchard, Associate Professor of Medicine, Thoracic Tumour Board, Gustave Roussy, France, said: "Post-progression outcomes are increasingly recognised as important measures of efficacy for 1st-line cancer therapies, and the consistency in risk reduction across these endpoints in FLAURA provides confidence in the data from the interim overall survival analysis."

Safety data for 1st-line Tagrisso in FLAURA were in line with those observed in prior clinical trials. It was well tolerated, with fewer Grade 3 or higher adverse events (AEs) than with standard EGFR-TKIs (34% vs. 45%). In patients treated, the most common adverse reactions were rash (58% [1.1% Grade ≥3] for Tagrisso vs. 78% [6.9% Grade ≥3] for the comparator arm), diarrhoea (58% [2.2% Grade ≥3] for Tagrisso vs. 57% [2.5% Grade ≥3] for the comparator arm) and dry skin (36% [<1% Grade ≥3] for Tagrisso vs. 36% [1.1% Grade ≥3] for the comparator arm).

NOTES TO EDITORS
About NSCLC
Lung cancer is the leading cause of cancer death among both men and women, accounting for about one-fifth of all cancer deaths, more than breast, prostate and colorectal cancers combined. Approximately 10-15% of patients in the US and Europe, and 30-40% of patients in Asia have EGFRm NSCLC. These patients are particularly sensitive to treatment with EGFR-TKIs, which block the cell-signalling pathways that drive the growth of tumour cells. Tumours almost always develop resistance to EGFR-TKI treatment, however, leading to disease progression. Approximately half of patients develop resistance to approved EGFR-TKIs such as gefitinib, erlotinib and afatinib due to the EGFR T790M resistance mutation. There is also a need for medicines with improved CNS efficacy, since approximately 25% of patients with EGFRm NSCLC have brain metastases at diagnosis, increasing to approximately 40% within two years of diagnosis.

About Tagrisso
Tagrisso (osimertinib) is a third-generation, irreversible EGFR-TKI designed to inhibit both EGFR-sensitising and EGFR T790M-resistance mutations, with improved clinical activity against CNS metastases. Tagrisso 40mg and 80mg once-daily oral tablets have been approved in more than 75 countries, including the US, EU, Japan and China for patients with EGFR T790M mutation-positive advanced NSCLC. Tagrisso is also being investigated in the adjuvant setting and in combination with other treatments.

About the FLAURA trial
The FLAURA trial assessed the efficacy and safety of 1st-line Tagrisso 80mg once daily vs. standard-of-care EGFR-TKIs (either erlotinib [150mg orally, once daily] or gefitinib [250mg orally, once daily]) in previously-untreated patients with locally-advanced or metastatic EGFRm NSCLC. The trial was double-blinded and randomised, with 556 patients across 29 countries.

About AstraZeneca in Lung Cancer
AstraZeneca is committed to developing medicines to help every patient with lung cancer. We have three approved medicines and a growing pipeline that targets genetic changes in tumour cells and boosts the power of the immune response against cancer. Our unrelenting pursuit of science aims to deliver more breakthrough therapies with the goal of extending and improving the lives of patients across all stages of disease and lines of therapy.
About 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 at least six new medicines to be launched between 2014 and 2020, and a broad pipeline of small molecules and biologics in development, we are committed to advance Oncology as a key growth platform for AstraZeneca focused on lung, ovarian, breast and blood cancers. In addition to our core capabilities, we actively pursue innovative partnerships and investments that accelerate the delivery of our strategy, as illustrated by our investment in Acerta Pharma in haematology.
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.