The expression ratio of Map7/B2M is prognostic for survival in patients with stage II colon cancer

Int J Oncol. 2008 Sep;33(3):579-84.

Abstract

Colorectal cancer (CRC) is the second most frequent cause of cancer-related death in the United States. To determine whether certain molecular markers might be prognostic for survival, we measured by quantitative real-time RT-PCR the expression levels of 15 previously studied genes that are known to be up-regulated or down-regulated in the progression of epithelial cancers. The tumor samples were extracted from formalin-fixed paraffin-embedded primary tissues derived from patients with Stage II CRC who developed disease recurrence within two years (n=10), or were disease-free for at least 4 years (n=12). We were able to determine, by AUC curve analysis, that the ratio of microtubule associated protein 7 (Map7)/B2M was predictive of outcome in our sample set. Further, using Kaplan-Meier survival analysis, we observed significantly different curves as a function of marker positivity for the Map7/B2M (p=0.0001; HR=11) expression ratio. This suggests that the expression ratio of Map7/B2M may serve as a valuable prognostic marker in patients with Stage II colon cancer, and potentially guide therapeutic decision making.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenocarcinoma / metabolism*
  • Adenocarcinoma / mortality
  • Adenocarcinoma / pathology
  • Aged
  • Aged, 80 and over
  • Area Under Curve
  • Biomarkers, Tumor / analysis*
  • Colonic Neoplasms / metabolism*
  • Colonic Neoplasms / mortality
  • Colonic Neoplasms / pathology
  • Female
  • Gene Expression
  • Humans
  • Kaplan-Meier Estimate
  • Male
  • Microtubule-Associated Proteins / biosynthesis*
  • Microtubule-Associated Proteins / genetics
  • Neoplasm Staging
  • Prognosis
  • ROC Curve
  • Reverse Transcriptase Polymerase Chain Reaction
  • beta 2-Microglobulin / biosynthesis*
  • beta 2-Microglobulin / genetics

Substances

  • Biomarkers, Tumor
  • Microtubule-Associated Proteins
  • beta 2-Microglobulin