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Related Experiment Videos

Amplified genes in human gliomas

V P Collins1

  • 1Department of Pathology I, Sahlgrenska Hospital, Stockholm, Sweden.

Seminars in Cancer Biology
|February 1, 1993
PubMed
Summary

Glioblastomas, a common brain tumor, often show amplified genes like EGFR. These genetic changes can create unique tumor markers, paving the way for future cancer treatments.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Gliomas are the most common adult brain tumors, with glioblastoma being the most malignant type.
  • Double minute chromosomes, indicative of gene amplification, are present in 50% of glioblastomas.
  • Specific amplified genes, including MYCN, GLI, PDGFRA, and EGFR, have been identified in glioblastomas.

Purpose of the Study:

  • To investigate gene amplification in glioblastomas.
  • To identify specific amplified genes and their implications in glioblastoma development.
  • To explore the potential of aberrant proteins as tumor-specific targets.

Main Methods:

  • Analysis of gene amplification in glioblastoma samples.
  • Identification of amplified genes using molecular biological techniques.
  • Characterization of genetic rearrangements in amplified genes.

Main Results:

  • MYCN, GLI, PDGFRA, and EGFR were identified as amplified genes in glioblastomas.
  • EGFR amplification was found in approximately 40% of glioblastomas.
  • Amplification of PDGFRA and EGFR genes often resulted in rearrangements affecting their extracellular domains.

Conclusions:

  • Amplified and rearranged growth factor receptor genes (PDGFRA, EGFR) in glioblastoma can produce aberrant proteins.
  • These aberrant proteins may serve as cell-surface, tumor-specific epitopes.
  • Modern molecular techniques offer new insights into understanding and treating brain tumors.

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