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Related Experiment Videos

Differential expression of selected histone modifier genes in human solid cancers.

Hilal Ozdağ1, Andrew E Teschendorff, Ahmed Ashour Ahmed

  • 1Department of Oncology, Hutchison/MRC Research Centre, University of Cambridge, Cambridge CB2 2XZ, UK. hilalozdag@gmail.com

BMC Genomics
|April 28, 2006
PubMed
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Chromatin modifier gene expression, including histone acetyltransferases (HATs), histone deacetylases (HDACs), and histone methyltransferases (HMTs), shows distinct patterns in various cancers. These patterns can help differentiate tumor from normal tissues and may have clinical applications.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cancer Research

Background:

  • Chromatin remodelling via histone post-translational modifications regulates gene expression.
  • 12 chromatin modifier genes from three classes (HATs, HDACs, HMTs) were investigated.
  • Gene expression was analyzed in 225 cancer and normal tissue samples.

Purpose of the Study:

  • To characterize expression patterns of key chromatin modifier genes in different cancer types.
  • To determine if these expression patterns can distinguish tumor samples from normal tissues.
  • To explore the potential clinical applications of these expression patterns.

Main Methods:

  • Quantitative Reverse Transcription PCR (QRT-PCR) was used to analyze gene expression.
  • Expression data was normalized using 8 housekeeping genes and compared to a universal reference RNA.

Related Experiment Videos

  • Linear regression, supervised analysis, Independent Component Analysis, and linear discriminant classification were employed.

    • Main Results:

    • Mutation analysis revealed minimal coding-sequence alterations in selected HDACs and HMTs.
    • Expression patterns of many chromatin modifier genes effectively discriminated tumor samples from normal tissues.
    • A subset of 5 genes (SIRT1, CREBBP, HDAC7A, HDAC5, PCAF) accurately classified most samples using a linear discriminant classifier.

    Conclusions:

    • Expression patterns of HATs, HDACs, and HMTs are crucial in neoplastic transformation.
    • These genes exhibit characteristic expression profiles dependent on the tissue of origin.
    • The findings suggest potential clinical applications for understanding cancer development and classification.