1. Cases of ROS1-rearranged lung cancer: when to use crizotinib, entrectinib, lorlatinib, and beyond?
- Author
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Kartik Sehgal, Hollis Viray, Deepa Rangachari, Andrew J. Piper-Vallillo, Adeel M Khan, and Daniel B. Costa
- Subjects
Oncology ,Cancer Research ,medicine.medical_specialty ,entrectinib ,rearrangement ,ROS1 fusion ,non-small cell lung cancer (NSCLC) ,non-small-cell lung cancer (NSCLC) ,Entrectinib ,Article ,lorlatinib ,Internal medicine ,ROS1 ,Medicine ,Pharmacology (medical) ,Lung cancer ,crizotinib ,Crizotinib ,Oncology (nursing) ,business.industry ,acquired resistance ,Oncogene Addiction ,medicine.disease ,Lorlatinib ,Clinical trial ,Anesthesiology and Pain Medicine ,Surgery ,business ,medicine.drug - Abstract
ROS1-rearranged (also known as ROS1 fusion-positive) non-small-cell lung cancer is an uncommon but distinct molecular subgroup seen in approximately 1-2% of cases. Oncogene addiction due to constitutive ROS1 tyrosine kinase activation has allowed development of molecularly targeted therapies with remarkable anti-tumor activity. Both crizotinib and entrectinib, multitargeted tyrosine kinase inhibitors (TKIs) have now received approval by the FDA for treatment of patients with advanced ROS1-rearranged lung cancers; however, the clinical efficacy and safety of these drugs have been derived from expansion cohorts of single-arm phase I or basket clinical trials with relatively small populations of this clinically and molecularly distinct subgroup. Both drugs lead to high objective response rates (approximately 70-80%) and have manageable side effects, although only entrectinib has potent intracranial efficacy. Lorlatinib is an oral brain-penetrant ALK/ROS1 TKI with activity in both TKI-naive and some crizotinib-resistant settings (albeit with limited potency against the crizotinib/entrectinib-resistant ROS1-G2032R mutation). We describe cases of advanced ROS1-rearranged lung cancer receiving crizotinib, entrectinib, and/or lorlatinib in first and later line treatment settings to dissect the current state of evidence supporting management decisions for these patients. The next generation ROS1 TKIs (repotrectinib and DS-6051b), owing to their broad activity against kinase mutations including ROS1-G2032R in preclinical studies, hold promise to transform the current treatment paradigm and permit even further gains with regards to long-term outcomes in this subset of patients.
- Published
- 2020