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Related Experiment Videos

A rapid polymerase chain reaction method for identifying fixed specimens.

P Gill1, C P Kimpton, K Sullivan

  • 1Central Research and Support Establishment, Aldermaston, Reading, Berkshire, England.

Electrophoresis
|March 1, 1992
PubMed
Summary
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DNA profiling of preserved tissues is now faster using Chelex extraction and automated sequencing. This method efficiently analyzes microsatellites, offering reliable genetic identification from historical samples within 48 hours.

Area of Science:

  • Forensic Science
  • Molecular Biology
  • Genetics

Background:

  • DNA profiling is crucial for identification.
  • Analyzing preserved samples presents challenges due to DNA degradation and inhibitors.
  • Efficient methods are needed for genetic analysis of historical specimens.

Purpose of the Study:

  • To develop and validate a rapid DNA profiling method for preserved tissue samples.
  • To assess the efficacy of Chelex resin in overcoming inhibitory substances.
  • To determine the feasibility of using automated sequencing for microsatellite analysis in forensic contexts.

Main Methods:

  • DNA extraction from preserved tissues using Chelex resin to chelate metal ions.
  • Analysis of low molecular weight trimeric and tetrameric microsatellites.

Related Experiment Videos

  • Fluorescent dye labeling and sizing using an automated DNA sequencer.

    • Main Results:

    • Successful DNA profiling was achieved from preserved tissue samples.
    • The entire analysis, from extraction to result, was completed within 48 hours.
    • Calculated probabilities of chance association using two microsatellites ranged from 10(-2) to 10(-4).

    Conclusions:

    • The described DNA profiling method is efficient and rapid for preserved samples.
    • Chelex-based extraction effectively removes inhibitors, enabling reliable genetic analysis.
    • This technique holds significant potential for routine forensic genetic analysis of historical specimens.