High-resolution chromosome arm 5p array CGH analysis of small cell lung carcinoma cell lines

Genes Chromosomes Cancer. 2005 Mar;42(3):308-13. doi: 10.1002/gcc.20137.

Abstract

Genomic amplification of regions on chromosome arm 5p has been observed frequently in small cell lung cancer (SCLC), implying the presence of multiple oncogenes on this arm. Although conventional comparative genomic hybridization (CGH) detects gross chromosomal copy number changes, gene discovery requires a higher-resolution approach in order to identify regions of alteration precisely. To identify candidate genes on this chromosome arm, we developed a high-resolution, 10-clone-per-megabase bacterial artificial chromosome CGH array for 5p and examined a panel of 15 SCLC cell lines. Utilization of this CGH array has allowed the fine-mapping of breakpoints to regions as small as 200 kb in a single experiment. In addition to reporting our observations of aberrations at the well-characterized SKP2 and TERT loci, we describe the identification of microdeletions that have escaped detection by conventional screens and the identification TRIO and ANKH as novel putative oncogenes.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Biomarkers, Tumor / genetics*
  • Biomarkers, Tumor / metabolism
  • Carcinoma, Small Cell / genetics*
  • Chromosome Aberrations*
  • Chromosome Mapping
  • Chromosomes, Artificial, Bacterial
  • Chromosomes, Human, Pair 5 / ultrastructure
  • DNA / genetics*
  • Female
  • Gene Expression Profiling*
  • Gene Expression Regulation, Neoplastic
  • Humans
  • In Situ Hybridization, Fluorescence
  • Karyotyping
  • Lung Neoplasms / genetics*
  • Male
  • Nucleic Acid Hybridization*
  • Oligonucleotide Array Sequence Analysis
  • Tumor Cells, Cultured

Substances

  • Biomarkers, Tumor
  • DNA