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Related Experiment Videos

Changes in methylation patterns identified by two-dimensional DNA fingerprinting.

K Uhlmann1, K Marczinek, J Hampe

  • 1Institut für Medizinische Genetik, Universitätsklinikum Charité, Berlin, Germany.

Electrophoresis
|August 6, 1999
PubMed
Summary

Two-dimensional DNA fingerprinting detects genomic differences in gliomas, including subtle DNA methylation changes. This method shows promise for identifying epigenetic alterations in tumor DNA.

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Area of Science:

  • Genomics
  • Epigenetics
  • Molecular Biology

Background:

  • Two-dimensional DNA fingerprinting (2-D fingerprinting) is a sensitive technique for analyzing genomic differences between tumor and normal DNA in glioma patients.
  • Numerous genomic alterations, including potential methylation differences, are observed even in low-grade gliomas.

Purpose of the Study:

  • To investigate the utility of 2-D fingerprinting for detecting DNA methylation changes in glioma.
  • To explore the relationship between observed DNA fragment migration shifts and methylation patterns.

Main Methods:

  • Utilized 2-D fingerprinting to analyze genomic DNA from glioma patients.
  • Investigated DNA methylation patterns using bisulfite treatment of agarose-embedded DNA.
  • Analyzed lambda-phage DNA fragment migration in denaturing gradient gels to assess the influence of methylation.

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Main Results:

  • Observed characteristic intensity shifts in 2-D fingerprint gels of glioma samples, suggesting methylation alterations.
  • Confirmed a specific CpG site was demethylated in tumor DNA compared to blood DNA.
  • Demonstrated that 2-D fingerprinting can reveal DNA methylation changes.

Conclusions:

  • 2-D fingerprinting is a powerful tool for detecting DNA methylation changes during genomic difference analysis.
  • The study highlights the potential of 2-D fingerprinting in identifying epigenetic alterations in gliomas.