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Updated: Jul 7, 2025

Oncogenic Gene Fusion Detection Using Anchored Multiplex Polymerase Chain Reaction Followed by Next Generation Sequencing
Published on: July 5, 2019
Oncogenic fusions: Targeting NTRK
Garo Hagopian1, Misako Nagasaka2
1Department of Medicine, University of California Irvine Medical Center, Orange, CA, USA.
Abstract:
Non-Small Cell Lung Cancer (NSCLC) is responsible for the highest number of cancer-related deaths in the United States. Thankfully, advancements in the detection and targeting of gene mutations have greatly improved outcomes for many patients. One significant mutation driving oncogenesis in various cancers, including NSCLC, is the neurotrophic tyrosine receptor kinase (NTRK) fusion. Presently, larotrectinib and entrectinib are the only FDA-approved therapies for NTRK-mutated cancers. Despite the efficacy and tolerability exhibited by these therapies, several clinical hurdles persist for physicians, including resistance mutations and limited penetration of the central nervous system (CNS), which diminishes their effectiveness. The treatment landscape for NTRK cancers is still being explored, with numerous new tyrosine kinase inhibitors currently in development or undergoing phase 1 and 2 clinical trials. In this review, we delve into both established and novel therapies targeting NTRK-mutated NSCLC.
Insights
Neurotrophic tyrosine receptor kinase (NTRK) fusions drive Non-Small Cell Lung Cancer (NSCLC). Established therapies face challenges, but novel treatments targeting NTRK-mutated NSCLC are emerging.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Non-Small Cell Lung Cancer (NSCLC) is a leading cause of cancer mortality in the U.S.
- Neurotrophic tyrosine receptor kinase (NTRK) gene fusions are key oncogenic drivers in various cancers, including NSCLC.
- Current FDA-approved therapies for NTRK-mutated cancers include larotrectinib and entrectinib.
Purpose of the Study:
- To review established and novel therapeutic strategies for NSCLC with NTRK fusions.
- To discuss the clinical challenges associated with current NTRK-targeted therapies.
- To highlight the ongoing development of new tyrosine kinase inhibitors for NTRK-mutated NSCLC.
Main Methods:
- Literature review of established and emerging therapies for NTRK-mutated NSCLC.
- Analysis of clinical hurdles such as resistance mutations and central nervous system (CNS) penetration.
- Exploration of ongoing clinical trials for novel tyrosine kinase inhibitors.
Main Results:
- Larotrectinib and entrectinib show efficacy but face limitations including resistance and CNS penetration.
- Numerous novel tyrosine kinase inhibitors targeting NTRK fusions are in early-phase clinical development.
- The treatment landscape for NTRK-mutated NSCLC is evolving with promising new therapeutic options.
Conclusions:
- Targeting NTRK fusions represents a significant advancement in NSCLC treatment.
- Overcoming resistance and improving CNS penetration are critical for enhancing therapeutic outcomes.
- Continued research and clinical trials are essential to expand treatment options for patients with NTRK-mutated NSCLC.
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