Cited by 40Colorectal Cancer Treatments and StudiesGenetic factors in colorectal cancerColorectal Cancer Surgical Treatments

A novel diagnostic tool for selecting patients with mesenchymal-type colon cancer reveals intratumor subtype heterogeneity

Open access
Ubink, Inge, Elias, Sjoerd G., Moelans, Cathy B., Laclé, Miangela M., van Grevenstein, Wilhelmina M. U., van Diest, Paul J., Borel Rinkes, Inne H. M., Kranenburg, Onno·2017·JNCI: Journal of the National Cancer Institute

Abstract

Background: Consensus molecular subtype 4 (CMS4) is a recently identified aggressive colon cancer subtype for which platelet-derived growth factor receptors (PDGFRs) and KIT are potential therapeutic targets. We aimed to develop a clinically applicable CMS4 reverse transcription polymerase chain reaction (RT-qPCR) test to select patients for PDGFR/KIT-targeted therapy. Methods: We used logistic regression to develop a CMS4 prediction rule based on microarray expression values of PDGFRA , PDGFRB , PDGFC , and KIT (566 training and 1259 test samples, using the 273-gene random forest classifier as CMS4 reference standard). We next translated the prediction rule into a single-sample RT-qPCR test, which we independently validated in 29 fresh tumor samples. To study intratumor CMS4 heterogeneity, we used the RT-qPCR test to analyze five random regions of 20 colon tumors. Results: The microarray-based prediction rule diagnosed CMS4-type tumors extremely well in both training and independent test samples (training: area under the curve [AUC] = 0.95, 95% confidence interval [CI] = 0.94 to 0.97; test: AUC = 0.95, 95% CI = 0.94 to 0.96), with excellent calibration and approximately 80% overall net benefit over a large threshold range. Translation into an RT-qPCR test did not affect discrimination (AUC = 0.97, 95% CI = 0.93 to 1.00, independent validation). RT-qPCR analysis of five random tumor regions revealed extensive intratumor CMS4 heterogeneity in nine out of 20 tumors. At least two regions likely have to be analyzed to identify patients that are predominantly CMS4 positive (>50% average CMS4 chance). Conclusion: The CMS4 RT-qPCR test is a promising clinical tool for selecting individual patients for CMS4-subtype-targeted therapy.

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Crossref · 10.1093/jnci/djw303

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Authors
Ubink, I., Elias, S. G., Moelans, C. B., Laclé, M. M., van Grevenstein, W. M. U., van Diest, P. J., Borel Rinkes, I. H. M., & Kranenburg, O.
Affiliations
University Medical Center Utrecht (NL)
Corresponding author
Kranenburg, Onno
Venue
JNCI: Journal of the National Cancer Institute
Published
2017-03-09
Volume
109
Issue
7
ISSN
  • 0027-8874 (ISSN-L)
  • 1460-2105
OpenAlex
W2594149170
Cited by
40
References
37
Citations by year
2026: 4 · 2025: 2 · 2024: 2 · 2023: 5 · 2022: 10 · 2021: 1 · 2020: 5 · 2019: 1 · 2018: 6 · 2017: 4
FWCI
1.97
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • JNCI Journal of the National Cancer Institute (publishedVersion)
  • PubMed (publishedVersion)
  • Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
  • Utrecht University Repository (Utrecht University) (submittedVersion)
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
colon cancer, PDGFRA, PDGFRβ, PDGF-C, KIT, intratumoral heterogeneity, molecular subtype prediction, patient selection for targeted therapy
MeSH terms
Biopsy, Colon, Colonic Neoplasms, Humans, Lymphokines, Neoplasm Staging, Platelet-Derived Growth Factor, Predictive Value of Tests, ROC Curve, Survival Rate, Disease-Free Survival, Patient Selection, Genetic Heterogeneity, Proto-Oncogene Proteins c-kit, Area Under Curve, Reverse Transcriptase Polymerase Chain Reaction, Receptor, Platelet-Derived Growth Factor alpha, Receptor, Platelet-Derived Growth Factor beta, Gene Expression Profiling, Molecular Diagnostic Techniques, Microarray Analysis, Molecular Targeted Therapy

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