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F. Baron
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P2.06 - Poster Session with Presenters Present (ID 467)
- Event: WCLC 2016
- Type: Poster Presenters Present
- Track: Scientific Co-Operation/Research Groups (Clinical Trials in Progress should be submitted in this category)
- Presentations: 1
- Moderators:
- Coordinates: 12/06/2016, 14:30 - 15:45, Hall B (Poster Area)
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P2.06-010 - AZD9291 as 1st-Line Therapy for EGFR Mutant NSCLC Patients with Concomitant Pretreatment EGFR T790M Mutation. The AZENT Study (ID 4267)
14:30 - 14:30 | Author(s): F. Baron
- Abstract
Background:
Osimertinib (AZD9291) is a selective and irreversible pyrimidine-based inhibitor of the primary activating and the secondary EGFR mutation, T790M, which is the most common mechanism of acquired resistance to 1st and 2nd-generation EGFR tyrosine-kinase inhibitors (TKIs). Progression-free survival (PFS) with osimertinib was 9.6 and 2.8 months (m) for EGFR mutated (EGFR+) NSCLC patients progressing to prior EGFR TKI therapy with and without EGFR T790M mutation, respectively, indicating that the T790M is a predictive biomarker for osimertinib efficacy. Sixty patients from two expansion cohorts of the same study, received 1st-line osimertinib and obtained a PFS of 19.3m. T790M, arising in cis with the primary activating mutation, confers resistance to EGFR TKIs, even in the absence of drug selection. The coexistence of the pretreatment T790M mutation has been under appreciated, in spite of accumulative evidence that is present in a frequency of 35-60% using different detection methods. In our experience, pretreatment T790M mutation is frequently detected by three specific aspects of the method: tumor microdissection, examination of two separate tumor areas, and the use of a peptic nucleid acid clamp that inhibits wild-type allele amplification. Thus, we designed the first phase IIa study to evaluate the safety and efficacy of osimertinib as 1st-line therapy for patients with metastatic EGFR+ NSCLC and concomitant pretreatment T790M mutation.
Methods:
This is a multicenter, single-arm, open-label, non-controlled phase IIa clinical study in Spain. Eligible patients are aged ≥18 years with metastatic EGFR+ NSCLC and by central testing documented presence of pretreatment T790M mutation. Seventy-three patients will receive continuous treatment with osimertinib 80 mg daily until disease progression, intolerable adverse events, consent withdrawal or noncompliance with the study protocol. The primary endpoint is the objective response rate (ORR) assessed using Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. The trial is designed to detect a ≥70% ORR in this patient population. Secondary objectives include PFS, overall survival, time to treatment failure, duration of response and disease control rate. Additional pre-specified secondary objectives of the study are the longitudinal analysis of EGFR mutations (including the T790M and the C797S mutations) in plasma and serum and the expression analysis of a panel of biomarkers with possible predictive value for osimertinib treatment.
Results:
Not applicable
Conclusion:
Not applicable
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P3.02c - Poster Session with Presenters Present (ID 472)
- Event: WCLC 2016
- Type: Poster Presenters Present
- Track: Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 12/07/2016, 14:30 - 15:45, Hall B (Poster Area)
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P3.02c-098 - An Observational Study of the Efficacy and Safety of Nivolumab in Patients with Advanced NSCLC. A Galician Lung Cancer Group (ID 5581)
14:30 - 14:30 | Author(s): F. Baron
- Abstract
Background:
Nivolumab is an immune checkpoint inhibitor antibody and it has demonstrated durable responses and tolerability in pretreated patients with advanced NSCLC. This is an observational study to evaluate the efficacy and safety of nivolumab in previously treated patients with advanced NSCLC in the expanded access programme.
Methods:
Elegibility criteria included, histologically confirmed NSCLC clinical stage IIIB vs IV, evaluable disease, at least one prior therapy, performance status of 0/1 and an adequate organ function. Exclusion criteria included, positive test for hepatitis B, C or human immunodeficiency virus, severe autoinmune disease and patients with systemic corticosteroids or immunosuppressive medications. Patients received nivolumab 3 mg/kg IV (60 min) every 2 weeks until progressive disease (PD) or unacceptable toxicity. The aim of the study was to report the efficacy and safety profile of Nivolumab in pretreated patients with advanced NSCLC of our everyday clinical practice. The exploratory assessments include response rate (RR), progression-free survival (PFS), overall survival (OS) and treatment related adverse events (AEs).
Results:
From August of 2015 to February of 2016, with a median follow time of 7 months, 66 patients were enrolled from 7 different centers. The patients demographics were: median age 60 years, 19 female and 47 male; 7 never smoked and 59 former or current smoker; 45 patients adenocarcinoma, 4 large-cell carcinoma, 12 squamous-cell carcinoma and 4 NSCLC; 20 stage IIIB and 46 stage IV; 17 with central nervous system metastasis; 30 received 2 or more prior therapy lines and 62 had PS 1. Among 48 patients evaluated, 3% had complete response, 21% partial response, 27% disease stabilization and 21% disease progression. At the time of database lock, the median of PFS was 2.03 IC 95% (1.2-2.7) and OS was not reached. Grade 1-2 treatment related adverse events (AEs) occurred in 38 patients and the most common ones were asthenia (25), rash/pruritis (12), anorexia (7), endocrine (5) and diarrhea (4). Each of the toxicities were manageable and there were no grade 3-4 AEs or treatment-related deaths.
Conclusion:
Early data from this study suggests that Nivolumab is effective and well tolerated in patients with pretreated advanced NSCLC.
