A four-microRNA classifier as a novel prognostic marker for tumor recurrence in stage II colon cancer

Sci Rep. 2018 Apr 18;8(1):6157. doi: 10.1038/s41598-018-24519-4.

Abstract

About 20 percent of TNM-stage II colon cancer patients who are treated by surgical resection develop recurrence, and adjuvant chemotherapy in this group is still debated among researchers and clinicians. Currently, adverse histopathological and clinical factors are used to select patients for adjuvant chemotherapy following surgery. However, additional biomarkers to classify patients at risk of recurrence are needed. We have conducted a study using fresh frozen tumor tissue from 54 TNM-stage II colon cancer patients and performed microRNA profiling using next-generation sequencing. For the selection of the prognostic microRNAs, a LASSO Cox Regression model was employed. For the validation, we used the publically available TCGA-COAD cohort (n = 122). A prognostic panel of four micorRNAs (hsa-miR-5010-3p, hsa-miR-5100, hsa-miR-656-3p and hsa-miR-671-3p) was identified in the study cohort and validated in the TCGA-COAD cohort. The four-microRNA classifier successfully identified high-risk patients in the study cohort (P < 0.001) and the validation cohort (P = 0.005). Additionally, a number of established risk factors and the four-miRNA classifier were used to construct a nomogram to evaluate risk of recurrence. We identified a four-microRNA classifier in patients with TNM-stage II colon cancer that can be used to discriminate between patients at low- and high risk of recurrence.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Biomarkers, Tumor*
  • Colonic Neoplasms / diagnosis*
  • Colonic Neoplasms / genetics*
  • Colonic Neoplasms / mortality
  • Female
  • Humans
  • Kaplan-Meier Estimate
  • Male
  • MicroRNAs / genetics*
  • Middle Aged
  • Neoplasm Recurrence, Local
  • Neoplasm Staging
  • Prognosis
  • Proportional Hazards Models
  • ROC Curve

Substances

  • Biomarkers, Tumor
  • MicroRNAs