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Related Experiment Videos

High resolution microarray comparative genomic hybridisation analysis using spotted oligonucleotides.

B Carvalho1, E Ouwerkerk, G A Meijer

  • 1Department of Pathology, VU University Medical Centre, de Boelelaan 1117, 1081HV Amsterdam, The Netherlands.

Journal of Clinical Pathology
|May 29, 2004
PubMed
Summary
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Spotted 60-mer oligonucleotides (oligos) offer a highly accurate and spatially resolved method for array comparative genomic hybridization (array CGH), surpassing current platforms. This advancement simplifies the analysis of DNA copy number changes across genomes.

Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Comparative genomic hybridization array (array CGH) is standard for detecting DNA copy number changes.
  • Current array CGH methods use bacterial artificial chromosomes (BACs)/phage artificial chromosomes (PACs) or cDNAs, which are costly and time-consuming to produce.
  • There is a need for more efficient and accurate array CGH platforms.

Purpose of the Study:

  • To evaluate the utility of spotted 60-mer oligonucleotides (oligos) as probes for array CGH.
  • To assess the accuracy and resolution of oligonucleotide array CGH (oligo CGH).

Main Methods:

  • Hybridization of tumor cell lines with known chromosomal aberrations onto BAC or oligoarrays.
  • Utilized human genome-mapped arrays for comparative analysis.

Related Experiment Videos

  • Compared the performance of oligo CGH against existing array CGH platforms.

    • Main Results:

    • Oligo CGH demonstrated high accuracy in detecting amplifications.
    • Achieved greater spatial resolution compared to other array CGH platforms.
    • Detected single copy number changes with resolution comparable to conventional CGH.

    Conclusions:

    • Oligonucleotides are flexible and easy to handle, enabling custom genome targeting without complex amplification.
    • A full genome array of ~30,000 oligos represents a significant advancement in analyzing chromosomal copy number changes.
    • Oligoarray CGH is applicable to any organism with a fully sequenced genome.