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Lopez-Chavez, Ariel; Thomas, Anish; Rajan, Arun; Raffeld, Mark; Morrow, Betsy; Kelly, Ronan; Carter, Corey Allan; Guha, Udayan; Killian, Keith; Lau, Christopher C; Abdullaev, Zied; Xi, Liqiang; Pack, Svetlana; Meltzer, Paul S; Corless, Christopher L; Sandler, Alan; Beadling, Carol; Warrick, Andrea; Liewehr, David J; Steinberg, Seth M; Berman, Arlene; Doyle, Austin; Szabo, Eva; Wang, Yisong; Giaccone, Giuseppe
Journal of clinical oncology, 03/2015, Volume: 33, Issue: 9Journal Article
We conducted a basket clinical trial to assess the feasibility of such a design strategy and to independently evaluate the effects of multiple targeted agents against specific molecular aberrations in multiple histologic subtypes concurrently. We enrolled patients with advanced non-small-cell lung cancer (NSCLC), small-cell lung cancer, and thymic malignancies who underwent genomic characterization of oncogenic drivers. Patients were enrolled onto a not-otherwise-specified arm and treated with standard-of-care therapies or one of the following five biomarker-matched treatment groups: erlotinib for EGFR mutations; selumetinib for KRAS, NRAS, HRAS, or BRAF mutations; MK2206 for PIK3CA, AKT, or PTEN mutations; lapatinib for ERBB2 mutations or amplifications; and sunitinib for KIT or PDGFRA mutations or amplification. Six hundred forty-seven patients were enrolled, and 88% had their tumors tested for at least one gene. EGFR mutation frequency was 22.1% in NSCLC, and erlotinib achieved a response rate of 60% (95% CI, 32.3% to 83.7%). KRAS mutation frequency was 24.9% in NSCLC, and selumetinib failed to achieve its primary end point, with a response rate of 11% (95% CI, 0% to 48%). Completion of accrual to all other arms was not feasible. In NSCLC, patients with EGFR mutations had the longest median survival (3.51 years; 95% CI, 2.89 to 5.5 years), followed by those with ALK rearrangements (2.94 years; 95% CI, 1.66 to 4.61 years), those with KRAS mutations (2.3 years; 95% CI, 2.3 to 2.17 years), those with other genetic abnormalities (2.17 years; 95% CI, 1.3 to 2.74 years), and those without an actionable mutation (1.85 years; 95% CI, 1.61 to 2.13 years). This basket trial design was not feasible for many of the arms with rare mutations, but it allowed the study of the genetics of less common malignancies.
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