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Updated: Aug 19, 2025

Author Spotlight: Advancements in Molecular Biomarker Testing for Non-Squamous Non-Small Cell Lung Cancer
Published on: September 8, 2023
How to manage KRAS G12C-mutated advanced non-small-cell lung cancer
Biagio Ricciuti1, Alessia Mira2, Elisa Andrini3,4
1Lowe Center for Thoracic Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.
Abstract:
Constitutive KRAS signalling drives tumorigenesis across several cancer types. In non-small-cell lung cancer (NSCLC) activating KRAS mutations occur in ~30% of cases, and the glycine to cysteine substitution at codon 12 (G12C) is the most common KRAS alteration. Although KRAS mutations have been considered undruggable for over 40 years, the recent discovery of allelic-specific KRAS inhibitors has paved the way to personalized cancer medicine for patients with tumours harbouring these mutations. Here, we review the current treatment landscape for patients with advanced NSCLCs harbouring a KRAS G12C mutation, including PD-(L) 1-based therapies and direct KRAS inhibitors as well as sequential treatment options. We also explore the possible mechanisms of resistance to KRAS inhibition and strategies to overcome resistance in patients with KRAS G12C-mutant NSCLC.
Insights
Targeting KRAS G12C mutations in non-small cell lung cancer (NSCLC) offers new hope. This review covers current treatments, resistance mechanisms, and strategies for KRAS G12C-mutant NSCLC patients.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Constitutive KRAS signaling is a key driver of tumorigenesis in various cancers.
- Activating KRAS mutations, particularly KRAS G12C, are prevalent in approximately 30% of non-small cell lung cancer (NSCLC) cases.
- KRAS mutations were historically considered undruggable targets for over four decades.
Purpose of the Study:
- To review the current treatment landscape for advanced NSCLC with KRAS G12C mutations.
- To explore emerging therapeutic strategies, including direct KRAS inhibitors and PD-(L)1-based therapies.
- To investigate mechanisms of resistance to KRAS inhibition and potential overcoming strategies.
Main Methods:
- Literature review of current treatment options for KRAS G12C-mutant NSCLC.
- Analysis of clinical trial data and research on direct KRAS inhibitors.
- Exploration of resistance pathways and combination therapies.
Main Results:
- Allelic-specific KRAS inhibitors represent a significant advancement in personalized cancer medicine.
- Current treatment options include PD-(L)1-based therapies and direct KRAS inhibitors.
- Understanding resistance mechanisms is crucial for optimizing sequential treatment strategies.
Conclusions:
- Targeted therapies for KRAS G12C-mutant NSCLC are transforming patient care.
- Further research into overcoming resistance is essential for improving long-term outcomes.
- Personalized medicine approaches are increasingly effective for NSCLC patients with specific KRAS alterations.
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