MET Exon 14 Skipping Mutations in Lung Adenocarcinoma: Clinicopathologic Implications and Prognostic Values

Journal of Thoracic Oncology : Official Publication of the International Association for the Study of Lung Cancer
Geun Dong LeeHyeong Ryul Kim

Abstract

Response to mesenchymal-epithelial transition (MET) inhibitors in NSCLC with mesenchymal-epithelial transition gene (MET) exon 14 skipping (METex14) has fueled molecular screening efforts and the search for optimal therapies. However, further work is needed to refine the clinicopathologic and prognostic implications of METex14 skipping. Among 795 East Asian patients who underwent a surgical procedure for NSCLC, we screened 45 patients with quintuple-negative (EGFR-negative/KRAS-negative/anaplastic lymphoma kinase gene [ALK]-negative/ROS1-negative/ret proto-oncogene [RET]-negative) lung adenocarcinomas by using reverse-transcriptase polymerase chain reaction and found 17 patients (37.8%) with METex14 skipping. We also investigated the effect of small interfering RNA (siRNA) targeting skipping junction in cells with METex14 skipping. The median age of the 17 patients was 73 years. The acinar subtype was predominant (52.9%), followed by the solid subtype (35.3%). MET immunohistochemistry demonstrated 100% sensitivity and 70.4% specificity. Multivariate analyses showed that patients with METex14 skipping had a higher recurrence rate than those with ALK fusion (versus METex14 skipping) (hazard ratio = 0.283, 95% confidence interval:...Continue Reading

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Jan 18, 2019·International Journal of Cancer. Journal International Du Cancer·Anna-Lena VolckmarAlbrecht Stenzinger
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