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Updated: Feb 5, 2026

Detection of Targetable Alterations in Non-small Cell Lung Cancer using Next-generation Sequencing
Published on: October 10, 2025
Impact of TP53 mutation status on systemic treatment outcome in ALK-rearranged non-small-cell lung cancer
A Kron1, C Alidousty2, M Scheffler1
1Network Genomic Medicine, Cologne, Germany; Lung Cancer Group Cologne, Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany; Center for Integrated Oncology Köln Bonn, Cologne, Germany.
Background:
We analyzed whether co-occurring mutations influence the outcome of systemic therapy in ALK-rearranged non-small-cell lung cancer (NSCLC).
Patients And Methods:
ALK-rearranged stage IIIB/IV NSCLC patients were analyzed with next-generation sequencing and fluorescence in situ hybridization analyses on a centralized diagnostic platform. Median progression-free survival (PFS) and overall survival (OS) were determined in the total cohort and in treatment-related sub-cohorts. Cox regression analyses were carried out to exclude confounders.
Results:
Among 216 patients with ALK-rearranged NSCLC, the frequency of pathogenic TP53 mutations was 23.8%, while other co-occurring mutations were rare events. In ALK/TP53 co-mutated patients, median PFS and OS were significantly lower compared with TP53 wildtype patients [PFS 3.9 months (95% CI: 2.4-5.6) versus 10.3 months (95% CI: 8.6-12.0), P < 0.001; OS 15.0 months (95% CI: 5.0-24.9) versus 50.0 months (95% CI: 22.9-77.1), P = 0.002]. This difference was confirmed in all treatment-related subgroups including chemotherapy only [PFS first-line chemotherapy 2.6 months (95% CI: 1.3-4.1) versus 6.2 months (95% CI: 1.8-10.5), P = 0.021; OS 2.0 months (95% CI: 0.0-4.6) versus 9.0 months (95% CI: 6.1-11.9), P = 0.035], crizotinib plus chemotherapy [PFS crizotinib 5.0 months (95% CI: 2.9-7.2) versus 14.0 months (95% CI: 8.0-20.1), P < 0.001; OS 17.0 months (95% CI: 6.7-27.3) versus not reached, P = 0.049] and crizotinib followed by next-generation ALK-inhibitor [PFS next-generation inhibitor 5.4 months (95% CI: 0.1-10.7) versus 9.9 months (95% CI: 6.4-13.5), P = 0.039; OS 7.0 months versus 50.0 months (95% CI: not reached), P = 0.001).
Conclusions:
In ALK-rearranged NSCLC co-occurring TP53 mutations predict an unfavorable outcome of systemic therapy. Our observations encourage future research to understand the underlying molecular mechanisms and to improve treatment outcome of the ALK/TP53 co-mutated subgroup.
Insights
Co-occurring TP53 mutations in ALK-rearranged non-small-cell lung cancer (NSCLC) patients significantly reduce progression-free survival and overall survival, regardless of treatment. These findings highlight TP53 as a negative prognostic marker in ALK-rearranged NSCLC.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- Systemic therapy outcomes in ALK-rearranged non-small-cell lung cancer (NSCLC) can be influenced by co-occurring mutations.
- Investigating these co-mutations is crucial for understanding treatment efficacy.
Purpose of the Study:
- To analyze the impact of co-occurring mutations on the efficacy of systemic therapy in patients with ALK-rearranged NSCLC.
- To identify specific mutations that predict treatment outcomes.
Main Methods:
- Retrospective analysis of 216 patients with ALK-rearranged NSCLC (stage IIIB/IV).
- Utilized next-generation sequencing and fluorescence in situ hybridization for mutation analysis.
- Determined median progression-free survival (PFS) and overall survival (OS) and performed Cox regression analyses.
Main Results:
- TP53 mutations were present in 23.8% of ALK-rearranged NSCLC patients; other co-mutations were rare.
- ALK/TP53 co-mutated patients had significantly lower median PFS (3.9 vs. 10.3 months) and OS (15.0 vs. 50.0 months) compared to TP53 wildtype patients.
- This survival disadvantage was consistent across various treatment subgroups, including chemotherapy and ALK-inhibitor therapies.
Conclusions:
- Co-occurring TP53 mutations are a significant negative predictor of systemic therapy outcomes in ALK-rearranged NSCLC.
- Further research into the molecular mechanisms of ALK/TP53 co-mutated NSCLC is warranted to improve treatment strategies.
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