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Sterilising embryos for transgenic chimaeras.

V Aige-Gil1, K Simkiss

  • 1Department of Pure and Applied Zoology, University of Reading, Whiteknights, England.

British Poultry Science
|July 1, 1991
PubMed
Summary
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Ultraviolet (UV) light exposure sterilized less than 75% of fowl embryos, despite causing significant cell damage and abnormalities. This method is not yet efficient for creating sterile embryos for germ cell manipulation.

Area of Science:

  • Developmental Biology
  • Genetics
  • Photobiology

Background:

  • Sterile avian embryos are valuable for germ cell transplantation and genetic manipulation research.
  • Ultraviolet (UV) irradiation is a potential method for inducing sterility in embryos.

Purpose of the Study:

  • To evaluate the efficacy of ultraviolet (UV) light in sterilizing fowl embryos.
  • To assess the teratological and mortality effects of UV irradiation on developing embryos.

Main Methods:

  • Fowl embryos at incubation stages 4 and 8-10 were exposed to a calibrated UV source for varying durations (30s, 3min, 10min).
  • Germinal crescents were targeted for irradiation.
  • Embryos were monitored for abnormalities, mortality, and sterility up to 6 days post-irradiation.

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Main Results:

  • UV irradiation, even with shell opening, induced significant abnormalities and mortality in fowl embryos.
  • Abnormalities and mortality decreased with increasing embryo age but increased with UV dosage.
  • Sterility rates consistently remained below 75%, indicating incomplete sterilization.

Conclusions:

  • UV irradiation is not an effective method for achieving high-level sterility in fowl embryos.
  • The procedure causes significant developmental abnormalities and mortality, limiting its utility for germ cell manipulation research.