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Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
Gene copy number analysis in malignant pleural mesothelioma using oligonucleotide array CGH
P M Lindholm1, K Salmenkivi, H Vauhkonen
1Department of Pathology, Haartman Institute and HUSLAB, University of Helsinki and Helsinki University Central Hospital, Finland.
Cytogenetic and Genome Research
|December 28, 2007
Summary
Gene copy number losses are a major driver in malignant mesothelioma (MM) development. This study identified recurrent copy number changes, highlighting losses as predominant in MM tumors.
Area of Science:
- Oncology
- Genetics
- Genomics
Background:
- Pleural malignant mesothelioma (MM) exhibits complex chromosomal aberrations.
- Previous studies utilized conventional cytogenetic analyses and comparative genomic hybridization (CGH).
Purpose of the Study:
- To characterize gene copy number changes in MM using array-CGH.
- To identify novel genetic aberrations in MM.
- To elucidate the role of copy number alterations in MM carcinogenesis.
Main Methods:
- Employed high-density oligonucleotide microarray-based comparative genomic hybridization (aCGH).
- Analyzed 26 well-characterized MM tumor samples.
- Quantified gene copy number variations, including losses and gains.
Main Results:
- Significant copy number changes (0-40 per sample) were observed.
- Gene copy number losses were more frequent than gains.
- The most common region of loss was 9p21.3 (CDKN2A/B locus).
- Recurrent minimal regions of loss and previously unreported gains were identified.
Conclusions:
- Gene copy number losses are a primary mechanism in MM development.
- A distinct pattern of copy number changes is recurrent in MM.
- aCGH is effective for uncovering genetic alterations in MM.
