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Introduction to basic mouse handling techniques.

John Donovan1, Patricia Brown, J P Reeves

  • 1Rhone-Poulenc Rorer, Collegeville, Pennsylvania, USA.

Current Protocols in Human Genetics
|April 23, 2008
PubMed
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This study details methods for purifying DNA from fixed, paraffin-embedded tissue (PET). Optimized protocols enable DNA amplification using polymerase chain reaction (PCR), crucial for molecular diagnostics.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Histology

Background:

  • DNA extraction from fixed, paraffin-embedded tissue (PET) presents challenges due to paraffin, protein, and potential heavy metal contaminants.
  • DNA obtained from PET is often unsuitable for traditional methods like Southern blot analysis.
  • Polymerase chain reaction (PCR) offers a viable method for amplifying short DNA fragments from challenging samples.

Purpose of the Study:

  • To outline protocols for efficient DNA purification from fixed, paraffin-embedded tissue (PET).
  • To enable the amplification of purified DNA using polymerase chain reaction (PCR).
  • To provide rapid and reliable methods for DNA extraction suitable for downstream molecular applications.

Main Methods:

  • A basic protocol for rapid DNA purification from PET with minimal manipulation to prevent contamination.

Related Experiment Videos

  • An alternate, more rigorous protocol involving xylene and phenol/chloroform extractions for difficult samples.
  • Assessment of DNA suitability for polymerase chain reaction (PCR) amplification.

    • Main Results:

    • The basic protocol provides a fast method for DNA purification from PET.
    • The alternate protocol enhances DNA yield and purity, particularly for suboptimally fixed tissues.
    • Purified DNA fragments were successfully amplified using PCR, demonstrating the utility of the extracted DNA.

    Conclusions:

    • Effective DNA purification from fixed, paraffin-embedded tissue (PET) is achievable using the described protocols.
    • The protocols facilitate the use of DNA from archival tissues for molecular analyses, especially PCR.
    • These methods are essential for genetic research and diagnostics utilizing formalin-fixed, paraffin-embedded samples.