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Gene expression in oligodendroglial tumors.

Elisabeth J Shaw1, Brian Haylock, David Husband

  • 1School of Cancer Studies, University of Liverpool, Liverpool, UK. e.j.shaw@liverpool.ac.uk

Analytical Cellular Pathology (Amsterdam)
|October 23, 2010
PubMed
Summary

Oligodendroglial tumors with 1p/19q loss show varied chemotherapy response. Gene expression profiling identified novel genes linked to chemosensitivity and 1p/19q status in these brain tumors.

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Area of Science:

  • Neuro-oncology
  • Genomics
  • Cancer Biology

Background:

  • Oligodendroglial tumors with 1p/19q loss generally exhibit better chemosensitivity and survival.
  • However, not all patients respond to chemotherapy, necessitating research into the underlying biological mechanisms of treatment response.
  • Understanding these mechanisms is crucial for improving therapeutic strategies.

Purpose of the Study:

  • To investigate the gene expression profiles of oligodendroglial tumors to identify molecular markers associated with chemotherapy response and 1p/19q chromosomal status.
  • To explore the biological basis of chemosensitivity in oligodendroglial tumors.

Main Methods:

  • Gene expression profiling was conducted on RNA from 28 oligodendroglial tumors treated with chemotherapy.
  • Real-time PCR was used to validate the expression of differentially expressed genes.

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  • Unsupervised hierarchical clustering was employed to analyze gene expression patterns and identify tumor subgroups.

    • Main Results:

    • Gene expression profiling revealed greater intra-tumor homogeneity than inter-tumor heterogeneity.
    • 176 genes were differentially expressed, with 164 associated with 1p/19q loss.
    • 94 genes distinguished chemotherapy responders from non-responders, with 12 not linked to 1p/19q status. Novel genes like SSBP2, GFRA1, FAP, and RASD1 were associated with treatment response.

    Conclusions:

    • Gene expression profiling of oligodendroglial tumors can identify subgroups based on 1p/19q status and chemotherapy response.
    • Several novel genes associated with 1p/19q status and treatment response were identified.
    • Further research is warranted to elucidate the role of these genes in oligodendroglial tumor biology and treatment.