Cited by 128Colorectal Cancer Treatments and StudiesGenetic factors in colorectal cancerColorectal Cancer Surgical Treatments

A combined oncogenic pathway signature of BRAF , KRAS and PI3KCA mutation improves colorectal cancer classification and cetuximab treatment prediction

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Tian, Sun, Simon, Iris, Moreno, Victor, Roepman, Paul, Tabernero, Josep, Snel, Mireille, van't Veer, Laura, Salazar, Ramon +2 more·2013·Gut

Abstract

Objective: To develop gene expression profiles that characterise KRAS -, BRAF - or PIK3CA -activated- tumours, and to explore whether these profiles might be helpful in predicting the response to the epidermal growth factor receptor (EGFR) pathway inhibitors better than mutation status alone. Design: Fresh frozen tumour samples from 381 colorectal cancer (CRC) patients were collected and mutations in KRAS , BRAF and PIK3CA were assessed. Using microarray data, three individual oncogenic and a combined model were developed and validated in an independent set of 80 CRC patients, and in a dataset from metastatic CRC patients treated with cetuximab. Results: 175 tumours (45.9%) harboured oncogenic mutations in KRAS (30.2%), BRAF (11.0%) and PIK3CA (11.5%). Activating mutation signatures for KRAS (75 genes), for BRAF (58 genes,) and for PIK3CA (49 genes) were developed. The development of a combined oncogenic pathway signature-classified tumours as ‘activated oncogenic’, or as ‘wildtype-like’ with a sensitivity of 90.3% and a specificity of 61.7%. The identified signature revealed other mechanisms that can activate ERK/MAPK pathway in KRAS , BRAF and PIK3CA wildtype patients. The combined signature is associated with response to cetuximab treatment in patients with metastatic CRC (HR 2.51, p<0.0009). Conclusion: A combined oncogenic pathway signature allows the identification of patients with an active EGFR-signalling pathway that could benefit from downstream pathway inhibition.

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Authors
Tian, S., Simon, I., Moreno, V., Roepman, P., Tabernero, J., Snel, M., van't Veer, L., Salazar, R., Bernards, R., & Capella, G.
Affiliations
  • Agendia (Netherlands) (NL)
  • Research and Development, Agendia BV, Amsterdam, The Netherlands
  • Universitat Autònoma de Barcelona (ES)
  • Universitat de Barcelona (ES)
  • IDIBELL, Institut Català d'Oncologia, L'Hospitalet de Llobregat, Spain
Venue
Gut
Publisher
BMJ
Published
2012-07-14
Volume
62
Issue
4
Pages
540-549
ISSN
  • 0017-5749 (ISSN-L)
  • 1468-3288
OpenAlex
W2111905790
Cited by
128
References
34
Citations by year
2026: 4 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 4 · 2021: 18 · 2020: 8 · 2019: 18 · 2018: 9 · 2017: 7 · 2016: 14 · 2015: 12 · 2014: 16 · 2013: 12 · 2012: 2
FWCI
6.65
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Gut (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • European Commission
  • Universiteit Leiden
  • Leids Universitair Medisch Centrum
Topics
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Surgical Treatments
Keywords
colorectal cancer, KRAS mutation, BRAF mutation, PIK3CA mutation, gene expression profiling, metastatic colorectal cancer, tumor classification
MeSH terms
Cetuximab, Antibodies, Monoclonal, Antineoplastic Agents, DNA Mutational Analysis, Humans, Mutation, Neoplasm Staging, Proto-Oncogene Proteins, ROC Curve, Sensitivity and Specificity, Biomarkers, Tumor, Colorectal Neoplasms, Gene Expression Regulation, Neoplastic, Proto-Oncogene Proteins p21(ras), ras Proteins, Drug Resistance, Neoplasm, Phosphatidylinositol 3-Kinases, Gene Expression Profiling, Microarray Analysis, Proto-Oncogene Proteins B-raf, Class I Phosphatidylinositol 3-Kinases, Antibodies, Monoclonal, Humanized

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