PURPOSE Genetic rearrangements of the tyrosine receptor kinase ROS proto-oncogene 1 (ROS1) are oncogenic drivers in non-small-cell lung cancer (NSCLC). We report the results of an updated integrated analysis of three phase I or II clinical trials (ALKA-372-001, STARTRK-1, and STARTRK-2) of the ROS1 tyrosine kinase inhibitor, entrectinib, in ROS1 fusion–positive NSCLC. METHODS The efficacy-evaluable population included adults with locally advanced or metastatic ROS1 fusion–positive NSCLC with or without CNS metastases who received entrectinib $ 600 mg orally once per day. Co-primary end points were objective response rate (ORR) assessed by blinded independent central review and duration of response (DoR). Secondary end points included progression-free survival (PFS), overall survival (OS), intracranial ORR, intracranial DoR, intracranial PFS, and safety. RESULTS In total, 161 patients with a follow-up of $ 6 months were evaluable. The median treatment duration was 10.7 months (IQR, 6.4-17.7). The ORR was 67.1% (n 5 108, 95% CI, 59.3 to 74.3), and responses were durable (12-month DoR rate, 63%, median DoR 15.7 months). The 12-month PFS rate was 55% (median PFS 15.7 months), and the 12-month OS rate was 81% (median OS not estimable). In 24 patients with measurable baseline CNS metastases by blinded independent central review, the intracranial ORR was 79.2% (n 5 19; 95% CI, 57.9 to 92.9), the median intracranial PFS was 12.0 months (95% CI, 6.2 to 19.3), and the median intracranial DoR was 12.9 months (12-month rate, 55%). The safety profile in this updated analysis was similar to that reported in the primary analysis, and no new safety signals were found. CONCLUSION Entrectinib continued to demonstrate a high level of clinical benefit for patients with ROS1 fusion–positive NSCLC, including patients with CNS metastases.
Bibliographical noteFunding Information:
Supported by F. Hoffmann-La Roche Ltd.
The authors thank the patients, their families, and the participating study centers. We also acknowledge the valuable contribution of Harald Zeuner to this manuscript. Third-party medical writing assistance, under the direction of the authors, was provided by Lewis Cawkwell, PhD, of Gardiner-Caldwell Communications, and was funded by F. Hoffmann-La Roche Ltd. Matthew Krebs acknowledges support from National Institute for Health Research (NIHR) Manchester Biomedical Research Centre and NIHR Manchester Clinical Research Facility at The Christie and Manchester Experimental Cancer Medicine Centre (Manchester, United Kingdom).
© 2021 by American Society of Clinical Oncology Creative Commons Attribution Non-Commercial No Derivatives 4.0 License
All Science Journal Classification (ASJC) codes
- Cancer Research