Colorectal cancer intrinsic subtypes predict chemotherapy benefit, deficient mismatch repair and epithelial-to-mesenchymal transition

Paul Roepman, Andreas Schlicker, Josep Tabernero, Ian Majewski, Sun Tian, Victor Moreno, Mireille H. Snel, Christine M. Chresta, Robert Rosenberg, Ulrich Nitsche, Teresa Macarulla, Gabriel Capella, Ramon Salazar, George Orphanides, Lodewyk F.A. Wessels, Rene Bernards, Iris M. Simon

Research output: Contribution to journalArticleResearchpeer-review

189 Citations (Scopus)

Abstract

In most colorectal cancer (CRC) patients, outcome cannot be predicted because tumors with similar clinicopathological features can have differences in disease progression and treatment response. Therefore, a better understanding of the CRC biology is required to identify those patients who will benefit from chemotherapy and to find a more tailored therapy plan for other patients. Based on unsupervised classification of whole genome data from 188 stages I-IV CRC patients, a molecular classification was developed that consist of at least three major intrinsic subtypes (A-, B- and C-type). The subtypes were validated in 543 stages II and III patients and were associated with prognosis and benefit from chemotherapy. The heterogeneity of the intrinsic subtypes is largely based on three biological hallmarks of the tumor: epithelial-to-mesenchymal transition, deficiency in mismatch repair genes that result in high mutation frequency associated with microsatellite instability and cellular proliferation. A-type tumors, observed in 22% of the patients, have the best prognosis, have frequent BRAF mutations and a deficient DNA mismatch repair system. C-type patients (16%) have the worst outcome, a mesenchymal gene expression phenotype and show no benefit from adjuvant chemotherapy treatment. Both A-type and B-type tumors have a more proliferative and epithelial phenotype and B-types benefit from adjuvant chemotherapy. B-type tumors (62%) show a low overall mutation frequency consistent with the absence of DNA mismatch repair deficiency. Classification based on molecular subtypes made it possible to expand and improve CRC classification beyond standard molecular and immunohistochemical assessment and might help in the future to guide treatment in CRC patients. © 2013 UICC.
Original languageEnglish
Pages (from-to)552-562
JournalInternational Journal of Cancer
Volume134
Issue number3
DOIs
Publication statusPublished - 17 Sep 2013

Keywords

  • chemotherapy benefit
  • colorectal cancer
  • EMT
  • mismatch repair
  • molecular subtypes

Fingerprint Dive into the research topics of 'Colorectal cancer intrinsic subtypes predict chemotherapy benefit, deficient mismatch repair and epithelial-to-mesenchymal transition'. Together they form a unique fingerprint.

Cite this