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Related Experiment Videos

Transgenic livestock: premises and promises.

H Niemann1, W A Kues

  • 1Department of Biotechnology, Institut für Tierzucht und Tierverhalten (FAL), Mariensee, Neustadt, Germany. niemann@tzv.fal.de

Animal Reproduction Science
|June 14, 2000
PubMed
Summary

Generating transgenic livestock via microinjection is inefficient and costly. Advanced molecular tools, adapted from mice, promise to improve precision and efficiency in livestock genetic modification for commercial applications.

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Area of Science:

  • Animal Biotechnology
  • Genetics
  • Molecular Biology

Background:

  • Microinjection into zygotes is the standard for transgenic livestock, but suffers from low efficiency (1-4%), random integration, and mosaicism.
  • Current applications include producing recombinant proteins and xenotransplantation, with some success in improving livestock traits (e.g., pigs with hMt-pGH).

Purpose of the Study:

  • To review the limitations of current transgenic livestock generation methods.
  • To explore advanced molecular tools for precise genome modification in livestock.
  • To discuss the potential of these tools for future applications.

Main Methods:

  • Review of existing transgenic technologies and their limitations.
  • Discussion of advanced molecular tools developed in mice, including YACs/BACs, Tet-system, and site-specific recombinases.

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  • Consideration of adapting these tools for livestock applications.

    • Main Results:

    • Microinjection is inefficient, costly, and results in random transgene integration and variable expression.
    • Advanced tools like YACs/BACs, Tet-system, and recombinases offer precise genomic control and expression regulation.
    • Adaptation of these tools could significantly enhance the efficiency and applicability of transgenic livestock.

    Conclusions:

    • Current transgenic livestock generation methods require significant improvement in efficiency and precision.
    • Advanced molecular tools hold great promise for overcoming existing limitations.
    • Successful adaptation of these tools will unlock the full potential of transgenic livestock for various applications.