In AURA3 (NCT02151981), osimertinib, a 3rd-generation EGFR-TKI, significantly prolonged progressionfree survival (PFS) and improved response rate vs plt-pem in pts with centrally confirmed EGFR T790M advanced NSCLC and progression on a prior EGFR-TKI. Here we report mature OS data.
Adult pts were randomised 2:1 to receive oral osimertinib (80 mg once daily) or intravenous pem (500 mg per m2 of body surface area) + carboplatin (target area under the curve 5)/cisplatin (75 mg per m2), every 3 weeks, ≤6 cycles. Treatment beyond progression (RECIST 1.1) was allowed if clinical benefit continued. Pts receiving plt-pem could cross over to osimertinib on disease progression. Asymptomatic CNS metastases were allowed. Primary endpoint was investigator-assessed PFS. OS and safety are reported as secondary endpoints. Data cut-off (DCO): 15 March 2019.
In total, 419 pts were randomised (osimertinib, n = 279; plt-pem, n = 140); 99 pts (71%) crossed over to osimertinib from plt-pem. At DCO, 188 pts (67%) in the osimertinib arm vs 93 pts (66%) in the plt-pem arm had died, including 66/99 (67%) crossover pts; median OS 26.8 mo (95% confidence interval [CI] 23.5, 31.5) vs 22.5 mo (95% CI 20.2, 28.8) respectively, hazard ratio (HR) 0.87 (95% CI 0.67, 1.12; p = 0.277); survival rate at 24 mo was 55% vs 43% and at 36 mo was 37% vs 30%. Time to first subsequent treatment showed a large, clinically meaningful numerical advantage towards osimertinib, HR 0.21 (95% CI 0.16, 0.28; p < 0.001); time to second subsequent treatment, HR 0.87 (95% CI 0.69, 1.11; p = 0.263). In both arms, 99% pts had any adverse event (AE). Any AE grade ≥3 causally related to study treatment was 9% vs 34% for osimertinib and plt-pem respectively. Most common AEs were diarrhoea, 44% (grade ≥3, 1%), and nausea, 49% (grade ≥3, 4%), with osimertinib and plt-pem respectively.
A numerical advantage in OS was observed for pts receiving osimertinib vs plt-pem, with the majority of pts in the plt-pem arm having crossed over to osimertinib. The safety profile of osimertinib remains consistent with previous findings.
NCT02151981.
Laura Crocker, BMedSci, of iMed Comms, an Ashfield Company, who provided medical writing support funded by AstraZeneca.
AstraZeneca.
AstraZeneca.
Y-L. Wu: Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): AstraZeneca; Honoraria (self), Advisory / Consultancy, Research grant / Funding (institution): Roche; Honoraria (self): Eli Lilly; Honoraria (self): Pfizer; Honoraria (self): MSD; Honoraria (self): Bristol-Myers Squibb; Honoraria (self), Advisory / Consultancy: Boehringer Ingelheim. T.S.K. Mok: Honoraria (self): ACEA Pharma, Alpha Biopharma Co., Ltd., Amgen, Amoy Diagnostics Co., LTD., AstraZeneca (before 1/1/19), Bayer, BI, Blueprint Medicines Corporation, BMS, Celgene, CStone Pharmaceuticals, Eli Lilly, Fishawack Facilitate Ltd, Hengrui Therapeutics Inc., Ignyt; Advisory / Consultancy: ACEA Pharma, Alpha Biopharma Co., Ltd., Amgen, Amoy Diagnostics Co., LTD., AstraZeneca (before 1/1/19), Bayer, BI, Blueprint Medicines Corporation, BMS, Celgene, Cirina, CStone Pharmaceuticals, Eli Lilly, Fishawack Facilitate Ltd, geneDecode Co., Ltd. (un; Leadership role: AstraZeneca PLC, Hutchison Chi-Med; Research grant / Funding (institution): AstraZeneca, BMS, Clovis Oncology, MSD, Novartis, Pfizer, Roche, SFJ, XCovery; Shareholder / Stockholder / Stock options: Shareholder: Hutchison Chi-Med, Sanomics Ltd. Stock option: Clearbridge Biomedics (now Biolidics Ltd.), Loxo-Oncology, OrigiMed Co. Ltd., Virtus Medical Group; Full / Part-time employment: The Chinese University of Hong Kong; Officer / Board of Directors: Remunerated: AstraZeneca PLC, Hutchison Chi-Med Non-remunerated: American Society of Clinical Oncology (ASCO) Asian Thoracic Oncology Research Group (ATORG) Chinese Lung Cancer Research Foundation Limited (CLCRF) Chinese Society of Clinical Oncology (CS. J-Y. Han: Honoraria (self): Roche, AstraZeneca, Bristol-Myers Squibb, MSD, Takeda; Advisory / Consultancy: AstraZeneca, Bristol-Myers Squibb, MSD, Takeda, Pfizer, Novartis, Lilly; Research grant / Funding (self): Roche, Pfizer, Ono Pharmaceutical, Takeda. M-J. Ahn: Advisory / Consultancy, Speaker Bureau / Expert testimony: AstraZeneca, Merck, Sharp & Dohme, Ono Pharmaceutical, Lilly, Roche; Advisory / Consultancy: Alpha Pharmaceutical, Takeda. S.S. Ramalingam: Honoraria (self), Advisory / Consultancy: AstraZeneca, Amgen, Bristol-Myers Squibb, Merck, Roche/Genentech, Loxo, Nektar, Tesaro; Research grant / Funding (institution): AstraZeneca, Amgen, Bristol-Myers Squibb, Merck, Tesaro, Advaxis, Takeda. S-W. Kim: Advisory / Consultancy, Research grant / Funding (institution): AstraZeneca. F.A. Shepherd: Advisory / Consultancy, Research grant / Funding (institution), Shareholder / Stockholder / Stock options: AstraZeneca. J. Laskin: Research grant / Funding (institution): AstraZeneca, Roche, Boehringer Ingelheim, Pfizer; Honoraria (self): AstraZeneca, Roche, Pfizer. H. Akamatsu: Honoraria (self), Advisory / Consultancy: AstraZeneca; Honoraria (self), Honoraria (institution): Chugai; Honoraria (self), Honoraria (institution), Advisory / Consultancy: Pfizer; Honoraria (self), Honoraria (institution): Boehringer Ingelheim. W-C. Su: Travel / Accommodation / Expenses: Bristol-Myers Squibb; Travel / Accommodation / Expenses: Boehringer Ingelheim. T. John: Advisory / Consultancy: Roche, Bristol-Myers Squibb, Merck, Ignyta, AstraZeneca, Takeda, Boehringer Ingelheim, Pfizer. M. Sebastian: Honoraria (self), Honoraria (institution), Advisory / Consultancy, Speaker Bureau / Expert testimony: AstraZeneca, Roche, Novartis; Honoraria (self), Advisory / Consultancy, Speaker Bureau / Expert testimony: Pfizer, Boehringer Ingelheim, Celgene, Takeda, Bristol-Myers Squibb, MSD; Honoraria (self), Advisory / Consultancy: Lilly. H. Mann: Shareholder / Stockholder / Stock options, Full / Part-time employment: AstraZeneca. M. Miranda: Shareholder / Stockholder / Stock options, Full / Part-time employment: AstraZeneca. G. Laus: Shareholder / Stockholder / Stock options, Full / Part-time employment: AstraZeneca. Y. Rukazenkov: Shareholder / Stockholder / Stock options, Full / Part-time employment: AstraZeneca. V. Papadimitrakopoulou: Honoraria (self): F Hoffman-La Roche; Advisory / Consultancy: Nektar Therapeutics, AstraZeneca Pharmaceuticals, Arrys Therapeutics, Merck&Co, LOXO Oncology, Araxes Pharma, F.Hoffman-LaRoche Ltd, Janssen Research Foundation, Bristol-Myers Squibb, Clovis Oncology, Eli Lilly &Co, Novartis Pharmaceuticals Corp. Takeda ; Research grant / Funding (institution): Eli Lilly &Co, Novartis, Merck, AstraZeneca Pharmaceuticals, F Hoffman-La Roche, Nektar Therapeutics, Janssen, Bristol-Myers Squibb, Checkmate, Incyte. All other authors have declared no conflicts of interest.