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T. Puri
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MINI 17 - WT EGFR, Angiogenesis and OMD (ID 131)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
- Moderators:R. Feld, R. Dziadziuszko
- Coordinates: 9/08/2015, 16:45 - 18:15, Mile High Ballroom 4a-4f
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MINI17.06 - Subgroup Analysis of East Asian Patients in the Phase III REVEL Trial (ID 729)
17:20 - 17:25 | Author(s): T. Puri
- Abstract
- Presentation
Background:
The REVEL trial demonstrated that second-line treatment with ramucirumab (RAM) plus docetaxel (DOC) significantly improved overall survival (OS) compared to placebo (PBO) plus DOC in the intent-to-treat (ITT) population (N=1253) of patients with stage IV non-small cell lung cancer. The REVEL trial also significantly improved progression-free survival (PFS) and objective response rates (ORRs). Results from the East Asia (EA) subgroup (Taiwan and Korea) analysis are presented.
Methods:
Subgroup analyses were performed in the EA ITT population, which consisted of all patients who were randomized in Taiwan (n=27) and Korea (n=62). Endpoints evaluated in the EA subgroup were OS, PFS, ORR, and safety. OS and PFS were analyzed using the Kaplan-Meier method and Cox proportional hazard model. Response was compared using the Cochran-Mantel-Haenszel test. ClinicalTrials.gov number NCT01168973.
Results:
In the 89 ITT EA patients, median OS was 15.44 months for the RAM plus DOC arm (n=43) and 10.17 months for PBO plus DOC arm (n=46) (HR: 0.762, 95% CI: 0.444–1.307). Median PFS was 4.88 months for the RAM plus DOC arm and 2.79 months for the PBO plus DOC arm (HR: 0.658, 95% CI: 0.408–1.060). The ORRs were 25.6% (95% CI: 13.5–41.2) in the RAM plus DOC arm and 9% (95% CI: 2.4–20.8) in the PBO plus DOC arm. Approximately two years after the enrollment of the first patient, in May 2012, the independent data monitoring committee recommended a reduction in the dose of DOC from 75 mg/m[2] to 60 mg/m[2] for newly enrolled EA patients, based on a higher incidence of neutropenia and febrile neutropenia associated with 75 mg/m[2] in EA patients compared to non-EA patients. This amendment resulted in a reduction in the toxicity associated with the original treatment regimen (Table). Table: Select grade ≥3 treatment-emergent adverse events, regardless of causality, by treatment arm and DOC dose in EA patients
Data are n (%). *Consolidated term.Preferred term RAM plus DOC (75 mg/m[2]) (n = 32) PBO plus DOC (75 mg/m[2]) (n = 33) RAM plus DOC (60 mg/m[2]) (n = 11) PBO plus DOC (60 mg/m[2]) (n = 13) Any 31 (96.9) 26 (78.8) 6 (54.5) 7 (53.8) Neutropenia* 26 (81.3) 24 (72.7) 6 (54.5) 5 (38.5) Febrile neutropenia 14 (43.8) 4 (12.1) 0 1 (7.7)
Conclusion:
Although not statistically powered to demonstrate significant improvement, the improved OS, PFS, and ORR observed in the EA subgroup treated with RAM plus DOC is consistent with the treatment effect observed in the overall ITT population in the REVEL trial. A dose reduction in DOC from 75 mg/m[2] to 60 mg/m[2] was associated with an improved safety profile and a reduction in the incidence of febrile neutropenia in the EA subgroup.
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ORAL 17 - EGFR Mutant Lung Cancer (ID 116)
- Event: WCLC 2015
- Type: Oral Session
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
- Moderators:P. Meldgaard, E. Felip
- Coordinates: 9/08/2015, 10:45 - 12:15, Four Seasons Ballroom F3+F4
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ORAL17.02 - Randomized Trial of Gefitinib with and without Pemetrexed as First-Line Therapy in East-Asian Patients with Advanced NS NSCLC with EGFR Mutations (ID 1319)
10:56 - 11:07 | Author(s): T. Puri
- Abstract
- Presentation
Background:
Pemetrexed (P) is the standard of care for non-squamous non-small cell lung cancer (NS NSCLC), whereas epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs), such as gefitinib (G), are the standard of care for advanced NSCLC with EGFR mutations. Clinical and nonclinical studies have demonstrated synergistic effects of EGFR TKIs and P. Based on these observations, the efficacy and safety of G+P was compared with G monotherapy in patients with NS NSCLC positive for activating EGFR mutations.
Methods:
The primary objective of this randomized, multicenter, open-label, parallel-arm, phase 2 East-Asian study was to assess whether G+P prolongs progression-free survival (PFS) versus G alone. Secondary endpoints included overall survival (OS), overall response rate, disease control rate, time to progressive disease, duration of response, and treatment-emergent adverse events (TEAEs). Eligible patients had stage IV NS NSCLC with activating EGFR mutations, were chemonaïve, and had an Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1. Patients were randomized in a 2:1 ratio (G+P:G). Dosing schedule was concurrent G (250 mg/day) and P (500 mg/m[2] every 3 weeks) in the G+P arm and G monotherapy (250 mg/day) in the G arm. Treatment continued until progression or unacceptable toxicity. The primary endpoint was analyzed after 144 events, which provided 70% power at a 1-sided 20% significance level, assuming a true hazard ratio (HR) of 0.79.
Results:
Between February 2012 and August 2013, 191 patients were randomized and treated (G+P: N=126; G: N=65). Patients were mostly female (64.4%) with a mean age of 62 years; most were never-smokers (67.0%), had confirmed stage IV disease (84.8%), and ECOG PS of 1 (68.6%). Overall, 55.0% had exon 19 deletions, 39.3% had exon 21 L858R mutations, and 5.8% had other activating EGFR mutations. Baseline characteristics were balanced between treatment arms. Patients in the G+P arm received 96.3% and 92.9% of the planned mean dose of G and P, respectively; patients in the G arm received 97.9% of the planned mean dose of G. Median PFS for G+P (15.8 months) was significantly longer than for G (10.9 months); HR=0.68; 95% confidence interval 0.48, 0.96; 1-sided P=0.014; 2-sided P=0.029. OS data are immature and will be reported at study completion. The incidence of grade 3/4 study drug-related TEAEs was significantly higher for G+P (42.1%) than for G (18.5%); P=0.001. The most common study drug-related TEAEs for G+P were diarrhea (44.4%), aspartate aminotransferase increased (41.3%), and dermatitis acneiform and alanine aminotransferase increased (38.1% for each), and for G were diarrhea (47.7%), dermatitis acneiform (43.1%), and dry skin (35.4%). The proportion of treatment discontinuations due to TEAEs was 16.7% in the G+P arm and 9.2% in the G arm; 2 patients (G+P arm) died due to study drug-related adverse events.
Conclusion:
The combination of G+P led to a significant improvement in PFS compared with G monotherapy for East-Asian patients with EGFR mutation-positive NS NSCLC, and met the primary study endpoint. The incidence of grade 3/4 study drug-related AEs was higher for G+P than for G. ClinicalTrials.gov identifier: NCT01469000.
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