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Clinical and Translational Oncology

, Volume 20, Issue 11, pp 1422–1429 | Cite as

Molecular subtypes in early colorectal cancer associated with clinical features and patient prognosis

  • M. Gil-Raga
  • E. Jantus-Lewintre
  • S. Gallach
  • V. Giner-Bosch
  • A. Frangi-Caregnato
  • M. J. Safont-Aguilera
  • J. Garde-Noguera
  • E. Zorraquino-Pina
  • M. García-Martínez
  • C. Camps-Herrero
Research Article
  • 76 Downloads

Abstract

Purpose

After surgical resection, an ample prognosis variability among stages is observed. Multiple prognostic factors are individually studied and some CRC classifiers have been proposed. Not one have been implemented into clinical practice.

Methods/patients

We classified 105 patients with resected CRC (stage I–III) into five molecular subtypes using BRAFV600E and RAS (KRAS; NRAS) status, and the expression of DNA mismatch repair (MMR) proteins (MLH1 and MSH2). Clinicopathological features and DFS) of distincts groups were evaluated.

Results and conclusions

RAS and BRAFV600E mutations were detected in 43.8 and 11.4% of patients, respectively. 19% of tumours had lack of expression of any MMR proteins reflecting a system deficiency (dMMR). Patients with any RAS mutation had lower DFS that patients with RAS wild type (wt) (40.23 vs 45.26 months; p value = 0.035). Of a total of five molecular subtypes, three were MMR proficient (pMMR): RAS mutated (39%), BRAFV600E mutated (6.7%) and RAS/BRAFV600E wt (35.2%); and two were dMMR: BRAFV600E mutated (4.8%) and BRAFV600E wt (14.3%). Left side tumours were more frequently observed in pMMR/RAS and BRAFV600E wt subtype, and right side tumours in dMMR subtypes. Among the three pMMR subtypes, a benefit survival was observed for patients without any mutation in BRAFv600E or RAS oncogenes (median of DFS = 45.5 vs 40.98 months in RAS mutated group; p = 0.084 and vs 34.13 in BRAFv600E mutated group; p = 0.031). Molecular classification using these biomarkers can be useful to identify groups with differences in prognosis.

Keywords

Colorectal cancer Prognostic factor Molecular subtypes 

Notes

Compliance with ethical standards

Conflict of interest

All authors declare that they have no competing interest.

Research involving human participants and/or animals/ethical approval

All procedures performed in studies involving human participants were in accordance with the Clinical Research Ethics Committee of General University Hospital of Valencia and by The Research Committee of Hospital of Sagunto, in accordance with the Declaration of Helsinki (1964), the Good Clinical Practices and local ethical and legal requirements (Spanish laws). This study complied with all applicable regulations for human participant studies. All authors reviewed and approved the final manuscript.

Informed consent

Prior to study entry, all patients provided written informed consent according to the local ethics committee regulations.

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Copyright information

© Federación de Sociedades Españolas de Oncología (FESEO) 2018

Authors and Affiliations

  • M. Gil-Raga
    • 1
  • E. Jantus-Lewintre
    • 2
    • 3
  • S. Gallach
    • 2
  • V. Giner-Bosch
    • 4
  • A. Frangi-Caregnato
    • 5
  • M. J. Safont-Aguilera
    • 6
  • J. Garde-Noguera
    • 7
  • E. Zorraquino-Pina
    • 8
  • M. García-Martínez
    • 9
  • C. Camps-Herrero
    • 6
    • 10
  1. 1.Medical Oncology DepartmentHospital de RequenaRequena (Valencia)Spain
  2. 2.Molecular Oncology Laboratory, CIBERONCFundación Investigación Hospital General Universitario de ValenciaValenciaSpain
  3. 3.Biotechnology Department, CIBERONCUniversitat Politécnica de ValènciaValenciaSpain
  4. 4.Centre for Quality and Change ManagementUniversitat Politècnica de ValènciaValenciaSpain
  5. 5.Department of SurgeryHospital de SaguntoValenciaSpain
  6. 6.Medical Oncology DepartmentHospital General Universitario de ValenciaValenciaSpain
  7. 7.Medical Oncology DepartmentHospital Arnau de VilanovaValenciaSpain
  8. 8.Anatomic Pathology DepartmentHospital de SaguntoValenciaSpain
  9. 9.Medical Oncology Department, Hospital de SaguntoFundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana (FISABIO)ValenciaSpain
  10. 10.Department of Medicine, CIBERONCUniversitat de ValenciaValenciaSpain

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