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Updated: Jan 18, 2026
Characterizing Exon Skipping Efficiency in DMD Patient Samples in Clinical Trials of Antisense Oligonucleotides
Published on: May 7, 2020
Mechanistic insights into MET exon 14 skipping mutations and their role in tumor progression
Promita Ghosh1,2, Isabella Pecora2,3, Morag Park1,4
1Department of Biochemistry, McGill University, Montréal, QC, Canada.
Abstract:
The MET receptor tyrosine kinase is a pivotal regulator of cellular survival, motility, and proliferation. Mutations leading to skipping of exon 14 (METΔex14) within the juxtamembrane domain of MET impair receptor degradation and prolong oncogenic signaling, contributing significantly to tumor progression across multiple cancer types. METΔex14 mutations are associated with aggressive clinical behavior, therapeutic resistance, and poor outcomes. Next-generation sequencing from both tissue and liquid biopsies has significantly improved the detection frequency of METΔex14 in lung and other cancers. However, clinical trials targeting METΔex14 have rendered partial responses and mixed outcomes due to the lack of a comprehensive mechanistic understanding of METΔex14 regulation and a diverse mutational landscape. This review synthesizes current knowledge on the mechanistic basis of METΔex14-driven oncogenesis, including alterations in receptor dynamics, downstream signaling perturbations, genomic alterations underlying this mutation, and mechanisms of acquired therapeutic resistance. We further discuss the clinical implications of these insights and highlight future research directions essential for optimizing targeted therapies.
Insights
MET exon 14 skipping (METΔex14) mutations drive cancer by preventing receptor degradation. Understanding METΔex14 mechanisms is crucial for developing effective targeted therapies against aggressive tumors.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The MET receptor tyrosine kinase is a key regulator of cell functions.
- MET exon 14 skipping (METΔex14) mutations disrupt MET degradation, promoting oncogenic signaling and tumor progression.
- These mutations are linked to aggressive cancers, therapeutic resistance, and poor patient outcomes.
Purpose of the Study:
- To review the mechanistic basis of METΔex14-driven oncogenesis.
- To synthesize current knowledge on METΔex14 regulation, signaling, and resistance.
- To discuss clinical implications and future research directions for optimizing targeted therapies.
Main Methods:
- Literature review synthesizing current knowledge on METΔex14.
- Analysis of alterations in receptor dynamics and downstream signaling.
- Examination of genomic alterations and mechanisms of acquired resistance.
Main Results:
- METΔex14 mutations impair MET receptor degradation, leading to prolonged oncogenic signaling.
- These mutations are associated with aggressive clinical behavior and resistance to therapies.
- A diverse mutational landscape and incomplete mechanistic understanding contribute to mixed clinical trial outcomes.
Conclusions:
- A comprehensive understanding of METΔex14 oncogenesis is essential for improving targeted therapy efficacy.
- Further research into receptor dynamics, signaling, and resistance mechanisms is needed.
- Optimizing targeted therapies requires addressing the complexity of METΔex14 mutations and their clinical implications.
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