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Related Experiment Videos

Cell electroporation is a highly efficient method for introducing restriction endonucleases into cells.

R A Winegar1, J W Phillips, J H Youngblom

  • 1Laboratory of Radiobiology and Environmental Health, University of California, San Francisco 94143-0750.

Mutation Research
|January 1, 1989
PubMed
Summary

Introducing restriction enzymes into Chinese hamster ovary cells via electroporation effectively induced DNA double-strand breaks, leading to high rates of chromosome aberrations and reduced cell survival. Electroporation alone had minimal impact.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • Restriction endonucleases are enzymes capable of inducing DNA double-strand breaks.
  • These breaks can be blunt-ended or cohesive-ended.
  • DNA double-strand breaks are known to cause chromosome aberrations.

Purpose of the Study:

  • To investigate the efficacy of cell electroporation for introducing restriction enzymes into Chinese hamster ovary cells.
  • To assess the impact of restriction enzyme introduction on chromosome aberration frequencies.
  • To evaluate the effect on cell survival following the procedure.

Main Methods:

  • Chinese hamster ovary cells were utilized.
  • Cell electroporation was employed as the method for introducing substances into the cells.

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  • Restriction endonucleases were introduced into the cells using electroporation.
  • Chromosome aberrations were analyzed at the metaphase stage.
  • Cell survival was measured by colony formation assays.

    • Main Results:

    • Cell electroporation successfully permeabilized Chinese hamster ovary cells for restriction enzyme delivery.
    • Introduction of restriction enzymes resulted in extremely high frequencies (greater than 90%) of aberrant metaphase cells.
    • A dramatic decrease in cell survival was observed after restriction enzyme introduction.
    • Cell electroporation as a standalone method did not increase aberrant chromosomes and only slightly affected cell survival.

    Conclusions:

    • Cell electroporation is a highly effective method for delivering restriction enzymes into mammalian cells.
    • Restriction enzyme-induced DNA double-strand breaks are potent inducers of chromosome aberrations.
    • The combined approach of electroporation and restriction enzymes significantly impacts cell viability.