Impact of BRAF Mutation Class on Disease Characteristics and Clinical Outcomes in BRAF-mutant Lung Cancer

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
Ibiayi Dagogo-JackMark M Awad

Abstract

BRAF mutations are divided into functional classes distinguished by signaling mechanism and kinase activity: V600-mutant kinase-activating monomers (class I), kinase-activating dimers (class II), and kinase-inactivating heterodimers (class III). The relationship between functional class and disease characteristics in BRAF-mutant non-small cell lung cancer (NSCLC) has not been fully explored. We performed a retrospective analysis of BRAF-mutant NSCLCs treated at 2 institutions from 2005 to 2017 to determine clinicopathologic characteristics, progression-free survival (PFS) on chemotherapy, and overall survival (OS). We identified 236 patients with BRAF-mutant NSCLC (n = 107 class I, n = 75 class II, and n = 54 class III). Patients with class II or III mutations were more likely to have brain metastases (P ≤ 0.01) and RAS coalterations (P ≤ 0.001) than class I. Compared with class I, PFS on chemotherapy was shorter for class II (P = 0.069) and class III (P = 0.034). OS was shorter for class II and III (class I, 40.1 months; class II, 13.9 months; and class III, 15.6 months; I vs. II, P < 0.001; I vs. III, P = 0.023); however, this difference was driven by fewer extrathoracic metastases and higher use of targeted therapies in clas...Continue Reading

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Citations

Oct 4, 2019·Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology·Christian MenzerJessica C Hassel
Aug 26, 2020·Cell Biology International·Xiujuan ShiJue Li
Apr 17, 2020·Current Oncology Reports·Alessandro RussoChristian Rolfo
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