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Related Experiment Videos

Multiple fluorescence-based PCR-SSCP analysis with postlabeling

H Iwahana1, K Adzuma, Y Takahashi

  • 1Otsuka Department of Clinical and Molecular Nutrition, University of Tokushima, Japan.

PCR Methods and Applications
|April 1, 1995
PubMed
Summary

A novel Multiple Fluorescence-based PCR Single-Strand Conformation Polymorphism (MF-PCR-SSCP) method with postlabeling efficiently detects single base mutations. This technique successfully identified seven mutations in the human K-ras oncogene using a single electrophoresis condition.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Single-strand conformation polymorphism (SSCP) is a widely used technique for detecting DNA sequence variations.
  • Traditional SSCP methods can be labor-intensive and may require optimization for different DNA fragment lengths.
  • The development of fluorescence-based methods offers potential for higher throughput and sensitivity.

Purpose of the Study:

  • To develop and validate a novel Multiple Fluorescence-based PCR Single-Strand Conformation Polymorphism (MF-PCR-SSCP) technique with postlabeling.
  • To assess the efficiency of the developed method in detecting single base mutations in the human K-ras oncogene.
  • To evaluate the performance of MF-PCR-SSCP under a single electrophoresis condition.

Main Methods:

  • Developed a postlabeling strategy for PCR products using fluorescently labeled dUTPs or ddNTPs via Klenow fragment.

Related Experiment Videos

  • Utilized ethanol precipitation to remove unincorporated dNTPs prior to labeling.
  • Applied heat-denatured, fluorescently labeled DNA fragments to a nondenaturing polyacrylamide gel on an automated DNA sequencer with temperature control.
  • Analyzed data using the Genescan 672 computer program.

    • Main Results:

    • Successfully developed and implemented MF-PCR-SSCP with postlabeling.
    • Demonstrated the capability to detect seven distinct single base mutations within the human K-ras oncogene.
    • Achieved mutation detection under a single electrophoresis condition, indicating robustness and efficiency.

    Conclusions:

    • MF-PCR-SSCP with postlabeling is a sensitive and efficient method for detecting single base mutations.
    • The technique offers advantages in terms of throughput and standardization by enabling detection under a single electrophoresis condition.
    • This method holds promise for genetic mutation screening and diagnostics, particularly for oncogenes like K-ras.