Cited by 56Lung Cancer Treatments and MutationsLung Cancer Diagnosis and TreatmentHER2/EGFR in Cancer Research

Pooled analysis of the prognostic and predictive value of KRAS mutation status and mutation subtype in patients with non-small cell lung cancer treated with epidermal growth factor receptor tyrosine kinase inhibitors

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Zer, Alona, Ding, Keyue, Lee, Siow Ming, Goss, Glenwood D., Seymour, Lesley, Ellis, Peter M., Hackshaw, Allan, Bradbury, Penelope A. +4 more·2016·Journal of Thoracic Oncology

Abstract

Objectives This pooled analysis of four trials of epidermal growth factor receptor tyrosine kinase inhibitors (EGFR TKIs) versus placebo was conducted to clarify the prognostic and predictive roles of Kirsten rat sarcoma viral oncogene homolog (KRAS) mutations (MUTs) and to explore the importance of MUT subtype.Methods Data were pooled from four trials of EGFR TKIs versus placebo (National Cancer Institute of Canada Clinical Trials Group [NCIC CTG] trial BR.21, TOPICAL, NCIC CTG trial BR.26, and NCIC CTG trial BR.19). Analyses of the combined data were performed to determine relationships of MUT status/subtype to response and survival end points.Results KRAS status was known for 1362 of 2624 patients (785 receiving EGFR TKIs and 577 receiving placebo); 275 (20%) had KRAS MUTs (248 at codon 12; 15 at codon 13; 12 at other codons). In the placebo arms there was no difference in overall survival (OS) for patients with KRAS MUTs or wild-type tumors (hazard ratio [HR] = 1.04, confidence interval [CI]: 0.81-1.33 for univariable analysis and HR = 1.09, CI: 0.85-1.41 for multivariable analysis). Patients with guanine-to-thymidine transversion MUTs had longer OS than did those with guanine-to-adenine transition MUTs or guanine-to-cytosine transversion MUTs (median OS 6.3, 1.8, and 3.9 months, respectively, p = 0.01). Patients with KRAS MUT tumors derived no benefit from EGFR TKIs (OS HR = 1.13, CI: 0.85-1.51; progression-free survival HR = 1.02, CI: 0.76-1.36). The interaction between KRAS status and EGFR TKI effect was significant for progression-free survival (p = 0.04) but not for OS (p = 0.17). For patients with G12V MUTs, EGFR TKI treatment was harmful (OS HR = 1.96, CI: 1.03-3.70, p = 0.04), whereas guanine-to-adenine transition MUTs were associated with an OS benefit from EGFR TKIs (HR = 0.49, CI: 0.24-1.00, p = 0.05).Conclusions Overall, KRAS MUT is neither prognostic nor predictive of benefit from EGFR TKIs. However, it appears that KRAS MUT subtypes are not homogeneous in terms of their prognostic and predictive effects. These observations require prospective validation.

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Authors
Zer, A., Ding, K., Lee, S. M., Goss, G. D., Seymour, L., Ellis, P. M., Hackshaw, A., Bradbury, P. A., Han, L., O’Callaghan, C. J., Tsao, M.-S., & Shepherd, F. A.
Affiliations
  • Princess Margaret Cancer Centre (CA)
  • Queen's University (CA)
  • University College London (GB)
  • University of Ottawa (CA)
  • Juravinski Cancer Centre (CA)
  • Cancer Research UK (GB)
Corresponding author
Zer, Alona
Venue
Journal of Thoracic Oncology
Publisher
Elsevier BV
Published
2016-03
Volume
11
Issue
3
Pages
312-323
ISSN
1556-0864 (ISSN-L)
OpenAlex
W2271051170
Cited by
56
References
32
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 11 · 2020: 10 · 2019: 4 · 2018: 7 · 2017: 4 · 2016: 6
FWCI
4.48
Type
journal article
Language
en
Open access
Locations
  • Journal of Thoracic Oncology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Cancer Research UK
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Diagnosis and Treatment
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
Keywords
KRAS mutation, non-small cell lung cancer, EGFR tyrosine kinase inhibitors, predictive biomarkers, prognostic factors, codon 12 mutation, G12V mutation, G12D mutation, overall survival, progression-free survival, treatment response, drug resistance, pooled analysis of clinical trials
MeSH terms
Carcinoma, Non-Small-Cell Lung, Female, Humans, Lung Neoplasms, Male, Middle Aged, Prognosis, Randomized Controlled Trials as Topic, Proto-Oncogene Proteins p21(ras), Protein Kinase Inhibitors, ErbB Receptors

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