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Updated: May 19, 2026

Detection of Targetable Alterations in Non-small Cell Lung Cancer using Next-generation Sequencing
Published on: October 10, 2025
Genetic and biochemical alterations in non-small cell lung cancer
Jackie L Johnson1, Smitha Pillai, Srikumar P Chellappan
1Cancer Biology Ph.D. Program, University of South Florida, Tampa, FL 33612, USA.
Abstract:
Despite significant advances in the detection and treatment of lung cancer, it causes the highest number of cancer-related mortality. Recent advances in the detection of genetic alterations in patient samples along with physiologically relevant animal models has yielded a new understanding of the molecular etiology of lung cancer. This has facilitated the development of potent and specific targeted therapies, based on the genetic and biochemical alterations present in the tumor, especially non-small-cell lung cancer (NSCLC). It is now clear that heterogeneous cell signaling pathways are disrupted to promote NSCLC, including mutations in critical growth regulatory proteins (K-Ras, EGFR, B-RAF, MEK-1, HER2, MET, EML-4-ALK, KIF5B-RET, and NKX2.1) and inactivation of growth inhibitory pathways (TP53, PTEN, p16, and LKB-1). How these pathways differ between smokers and non-smokers is also important for clinical treatment strategies and development of targeted therapies. This paper describes these molecular targets in NSCLC, and describes the biological significance of each mutation and their potential to act as a therapeutic target.
Insights
Targeted therapies are revolutionizing non-small-cell lung cancer (NSCLC) treatment by focusing on specific genetic mutations. Understanding these molecular targets, including key protein alterations, is crucial for developing effective lung cancer therapies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Lung cancer remains a leading cause of cancer mortality despite treatment advances.
- Genetic alterations in tumors drive non-small-cell lung cancer (NSCLC) development.
- Understanding molecular pathways is key to novel therapeutic strategies.
Purpose of the Study:
- To elucidate the molecular targets in non-small-cell lung cancer (NSCLC).
- To describe the biological significance of various mutations.
- To assess the potential of these mutations as therapeutic targets.
Main Methods:
- Review of recent advances in genetic alteration detection.
- Analysis of physiologically relevant animal models.
- Examination of disrupted cell signaling pathways in NSCLC.
Main Results:
- Identified key mutations in growth regulatory proteins (e.g., K-Ras, EGFR, ALK) and tumor suppressors (e.g., TP53, PTEN).
- Highlighted the heterogeneity of signaling pathway disruption in NSCLC.
- Emphasized the importance of understanding pathway differences between smokers and non-smokers.
Conclusions:
- Molecular profiling of NSCLC tumors reveals critical therapeutic targets.
- Targeted therapies offer potent and specific treatment options for NSCLC.
- Further research into smoking-related pathway differences can refine treatment strategies.
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