A Randomized, Phase II, Biomarker-Selected Study Comparing Erlotinib to Erlotinib Intercalated With Chemotherapy in First-Line Therapy for Advanced Non-Small-Cell Lung Cancer.

Publication Type:

Journal Article

Source:

Journal of clinical oncology : official journal of the American Society of Clinical Oncology, Volume 29, Issue 26, p.3567-3573 (2011)

Keywords:

2011, Antineoplastic Combined Chemotherapy Protocols, Biomarkers, Pharmacological, Cadherins, Carboplatin, Carcinoma, Non-Small-Cell Lung, Center-Authored Paper, Clinical Research Division, Drug Administration Schedule, Humans, Lung Neoplasms, paclitaxel, Proto-Oncogene Proteins, Quinazolines, ras Proteins, Receptor, Epidermal Growth Factor, Survival Analysis, Vimentin

Abstract:

PURPOSE Erlotinib prolongs survival in patients with advanced non-small-cell lung cancer (NSCLC). We report the results of a randomized, phase II study of erlotinib alone or intercalated with chemotherapy (CT + erlotinib) in chemotherapy-naïve patients with advanced NSCLC who were positive for epidermal growth factor receptor (EGFR) protein expression and/or with high EGFR gene copy number. PATIENTS AND METHODS A total of 143 patients were randomly assigned to either erlotinib 150 mg daily orally until disease progression (PD) occurred or to chemotherapy with paclitaxel 200 mg/m(2) intravenously (IV) and carboplatin dosed by creatinine clearance (AUC 6) IV on day 1 intercalated with erlotinib 150 mg orally on days 2 through 15 every 3 weeks for four cycles followed by erlotinib 150 mg orally until PD occurred (CT + erlotinib). The primary end point was 6-month progression-free survival (PFS); secondary end points included response rate, PFS, and survival. EGFR, KRAS mutation, EGFR fluorescent in situ hybridization and immunohistochemistry, and E-cadherin and vimentin protein levels were also assessed. Results Six-month PFS rates were 26% and 31% for the two arms (CT + erlotinib and erlotinib alone, respectively). Both were less than the historical control of 45% (P = .001 and P = .011, respectively). Median PFS times were 4.57 and 2.69 months, respectively. Patients with tumors harboring EGFR activating mutations fared better on erlotinib alone (median PFS, 18.2 months v 4.9 months for CT + erlotinib). CONCLUSION The feasibility of a multicenter biomarker-driven study was demonstrated, but neither treatment arms exceeded historical controls. This study does not support combined chemotherapy and erlotinib in first-line treatment of EGFR-selected advanced NSCLC, and the patients with tumors harboring EGFR mutations had a better outcome on erlotinib alone.