A computational index derived from whole-genome copy number analysis is a novel tool for prognosis in early stage lung squamous cell carcinoma

Genomics. 2012 Jan;99(1):18-24. doi: 10.1016/j.ygeno.2011.10.006. Epub 2011 Oct 25.

Abstract

Squamous cell carcinoma of the lung is remarkable for the extent to which the same chromosomal abnormalities are detected in individual tumours. We have used next generation sequencing at low coverage to produce high resolution copy number karyograms of a series of 89 non-small cell lung tumours specifically of the squamous cell subtype. Because this methodology is able to create karyograms from formalin-fixed paraffin-embedded material, we were able to use archival stored samples for which survival data were available and correlate frequently occurring copy number changes with disease outcome. No single region of genomic change showed significant correlation with survival. However, adopting a whole-genome approach, we devised an algorithm that relates to total genomic damage, specifically the relative ratios of copy number states across the genome. This algorithm generated a novel index, which is an independent prognostic indicator in early stage squamous cell carcinoma of the lung.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Algorithms
  • Carcinoma, Non-Small-Cell Lung / genetics*
  • Carcinoma, Non-Small-Cell Lung / mortality*
  • Carcinoma, Non-Small-Cell Lung / surgery
  • Carcinoma, Squamous Cell / genetics*
  • Carcinoma, Squamous Cell / mortality*
  • Carcinoma, Squamous Cell / surgery
  • Female
  • Gene Dosage
  • Genome, Human
  • Humans
  • Lung Neoplasms / genetics*
  • Lung Neoplasms / mortality*
  • Lung Neoplasms / surgery
  • Male
  • Middle Aged
  • Models, Genetic
  • Prognosis
  • Sequence Analysis, DNA
  • Survival Analysis