Phase I trial of everolimus in combination with thoracic radiotherapy in non-small-cell lung cancer

Eric Deutsch, C. Le Péchoux, L. Faivre, S. Rivera, Y. Tao, J. P. Pignon, M. Angokai, R. Bahleda, D. Deandreis, E. Angevin, C. Hennequin, B. Besse, A. Levy, J. C. Soria

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    Abstract

    Background: This phase I study evaluated the safety and efficacy of the oral mTOR inhibitor everolimus in combination with thoracic radiotherapy followed by consolidation chemotherapy in locally advanced or oligometastatic untreated nonsmall- cell lung cancer (NSCLC). Patients and methods: Everolimus dose was escalated in incremental steps [sequential cohorts of three patients until the occurrence of dose-limiting toxicity (DLT)] and administered orally weekly (weekly group: dose of 10, 20 or 50 mg) or daily (daily group: 2.5, 5 or 10 mg), 1 week before, and during radiotherapy until 3.5 weeks after the end of radiotherapy. Two cycles of chemotherapy (cisplatin-navelbine) were administrated 4.5 weeks after the end of radiotherapy. Results: Twenty-six patients were included in two centers, 56% had adenocarcinoma and 84% had stage III disease. In the weekly group (12 assessable patients), everolimus could be administered safely up to the maximum planned weekly dose of 50 mg; however, one patient experienced a DLT of interstitial pneumonitis at the weekly dose level of 20 mg. In the daily group (9 assessable patients): one DLT of interstitial pneumonitis with a fatal outcome was observed at the daily dose level of 2.5 mg; two other DLTs (one grade 3 esophagitis and one bilateral interstitial pneumonitis) were found at the daily dose level of 5 mg. Overall there were five patients with G3-4 interstitial pneumonitis related to treatment. Among 22 assessable patients for response, there were 9 (41%) partial response and 7 (32%) stable disease. At a median follow-up of 29 months, the 2-year overall survival and progression-free survival actuarial rates were 31% and 12%, respectively. Conclusion: In previously untreated and unselected NSCLC patients, the recommended phase II dose of everolimus in combination with thoracic radiotherapy is 50 mg/week. Pulmonary toxicity is of concern and should be carefully monitored to establish the potential role of mTOR inhibitor with concomitant radiotherapy.

    Original languageEnglish
    Pages (from-to)1223-1229
    Number of pages7
    JournalAnnals of Oncology
    Volume26
    Issue number6
    DOIs
    Publication statusPublished - 1 Jun 2015

    Keywords

    • Concomitant combination
    • Everolimus
    • Non-small-cell lung cancer
    • Phase I
    • Thoracic radiotherapy

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