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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Technical Demonstration of Whole Genome Array Comparative Genomic Hybridization
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Genomic analysis by oligonucleotide array Comparative Genomic Hybridization utilizing formalin-fixed,

Stephanie J Savage1, Galen Hostetter

  • 1Integrated Cancer Genomics Division, Translational Genomics Research Institute, Phoenix, AZ, USA.

Methods in Molecular Biology (Clifton, N.J.)
|January 5, 2011
PubMed
Summary

This study presents a new protocol to extract quality DNA from formalin-fixed, paraffin-embedded (FFPE) tissues. This method enables genome-wide discovery of gene dosage alterations in valuable archival clinical samples.

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Robust Detection of Gene Amplification in Formalin-Fixed Paraffin-Embedded Samples by Fluorescence In Situ Hybridization

Published on: July 12, 2024

Area of Science:

  • Genomics
  • Molecular Biology
  • Biotechnology

Background:

  • Formalin fixation is a standard method for preserving biological tissues for over a century.
  • Millions of formalin-fixed, paraffin-embedded (FFPE) tissue samples exist in archives, representing a vast, underutilized resource.
  • Formalin fixation causes DNA damage and degradation, hindering molecular analysis.

Purpose of the Study:

  • To develop a protocol for obtaining high-quality DNA from FFPE tissues.
  • To overcome DNA degradation caused by formalin fixation.
  • To enable genome-wide analysis of archival clinical samples.

Main Methods:

  • Utilized enzymatic reactions to process FFPE tissues.
  • Developed a protocol to extract quality DNA from diverse FFPE tissue types.
  • Applied genomic analysis, specifically high-density oligonucleotide array Comparative Genomic Hybridization (aCGH).

Main Results:

  • Successfully obtained quality DNA from a wide range of FFPE tissues.
  • Circumvented DNA degradation artifacts associated with formalin fixation.
  • Facilitated successful genome-wide discovery of gene dosage alterations.

Conclusions:

  • The developed protocol effectively retrieves usable DNA from FFPE tissues.
  • This method unlocks the potential of archival clinical samples for genomic research.
  • Enables the study of gene dosage alterations in historical patient cohorts.