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J Clin Oncol. 2018 Sep 10;36(26):2693-2701. doi: 10.1200/JCO.2017.77.5841. Epub 2018 May 16.

Exploratory Analysis of Brigatinib Activity in Patients With Anaplastic Lymphoma Kinase-Positive Non-Small-Cell Lung Cancer and Brain Metastases in Two Clinical Trials.

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1
D. Ross Camidge, University of Colorado Cancer Center, Aurora, CO; Dong-Wan Kim, Seoul National University Hospital; Myung-Ju Ahn, Samsung Medical Center; Dae Ho Lee, Asan Medical Center, Seoul, South Korea; Marcello Tiseo, University Hospital of Parma, Parma, Italy; Corey J. Langer, University of Pennsylvania, Philadelphia, PA; Alice T. Shaw, Massachusetts General Hospital, Boston; William Reichmann, Jeff Haney, Tim Clackson, and David Kerstein, ARIAD Pharmaceuticals, Cambridge, MA; Rudolf M. Huber, University Hospital of Munich, Munich, Germany; Maximilian J. Hochmair, Otto Wagner Hospital, Vienna, Austria; Lyudmila A. Bazhenova and Kathryn A. Gold, University of California San Diego Moores Cancer Center, La Jolla; Sai-Hong Ignatius Ou, University of California Irvine School of Medicine, Irvine, CA; Howard L. West, Swedish Cancer Institute, Seattle, WA; and Scott N. Gettinger, Yale Cancer Center, New Haven, CT.

Abstract

Purpose In patients with crizotinib-treated, anaplastic lymphoma kinase gene ( ALK)-rearranged non-small-cell lung cancer (ALK-positive NSCLC), initial disease progression often occurs in the CNS. We evaluated brigatinib, a next-generation ALK inhibitor, in patients with ALK-positive NSCLC with brain metastases. Patients and Methods Patients with ALK-positive NSCLC received brigatinib (90 to 240 mg total daily) in a phase I/II trial (phI/II; ClinicalTrials.gov identifier: NCT01449461) and in the subsequent randomized phase II trial ALTA (ALK in Lung Cancer Trial of AP26113; ClinicalTrials.gov identifier: NCT02094573; patients in arm A received 90 mg once daily; patients in arm B received 180 mg once daily with 7-day lead-in at 90 mg). Primary end points (systemic objective response rates [ORRs]) were previously reported. Independent review committees assessed intracranial efficacy in patients with baseline brain metastases. Results Most patients with ALK-positive NSCLC had baseline brain metastases (50 of 79 [63%], phI/II; 80 of 112 [71%] and 73 of 110 [66%] in ALTA arms A and B, respectively), many of whom had no prior brain radiotherapy (23 of 50 [46%], phI/II; 32 of 80 [40%], ALTA arm A; 30 of 73 [41%], arm B). All patients, except four in phI/II, had received crizotinib. Among patients with measurable (≥ 10 mm) brain metastases, confirmed intracranial ORR was 53% (eight of 15; 95% CI, 27% to 79%) in phI/II, 46% (12 of 26; 95% CI, 27% to 67%) in ALTA arm A, and 67% (12 of 18; 95% CI, 41% to 87%) in arm B. Intracranial ORRs were similar in subsets without prior radiation or progression postradiation. Among patients with any baseline brain metastases, median intracranial progression-free survival (iPFS) was 14.6 months (95% CI, 12.7 to 36.8 months), phI/II; 15.6 months (95% CI, 9.0 to 18.3 months), ALTA arm A; 18.4 months (95% CI, 12.8 months to not reached), ALTA arm B. Conclusion Brigatinib yielded substantial intracranial responses and durable iPFS in ALK-positive, crizotinib-treated NSCLC, with highest iPFS in patients receiving 180 mg once daily (with lead-in).

PMID:
29768119
DOI:
10.1200/JCO.2017.77.5841

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