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Related Experiment Videos

Selective decrease of chick embryonic primordial germ cells in vivo and in vitro by soft X-ray irradiation.

Jeong M Lim1, Huck M Kwon, Duk K Kim

  • 1Department of Food and Animal Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea.

Animal Reproduction Science
|October 20, 2005
PubMed
Summary

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Soft X-ray irradiation effectively depletes primordial germ cells (PGCs) in chicken embryos. This method improves germ cell-mediated transgenesis efficiency without impacting embryo hatchability or somatic cell viability.

Area of Science:

  • Developmental Biology
  • Genetics
  • Radiological Science

Background:

  • Primordial germ cells (PGCs) are crucial for reproduction and genetic modification.
  • Germ cell-mediated transgenesis in chickens requires efficient manipulation of PGCs.
  • Existing methods for PGC depletion may affect embryo viability or somatic cells.

Purpose of the Study:

  • To investigate the feasibility of using soft (low-energy) X-ray irradiation to deplete endogenous PGCs in chicken embryos.
  • To assess the impact of X-ray irradiation on PGC numbers, gonadal cell populations, and embryo hatchability.
  • To evaluate the potential of X-ray irradiation for enhancing germ cell-mediated transgenesis.

Main Methods:

  • Chicken embryos at various developmental stages (X, 9, 14) were exposed to soft X-rays at different doses (15, 16.5, 18 kV).

Related Experiment Videos

  • PGC and total gonadal cell numbers were quantified at specific developmental stages (28).
  • Embryo hatchability was monitored after irradiation.
  • Isolated gonadal cells were cultured post-irradiation to assess PGC proliferation.

    • Main Results:

    • X-ray irradiation at 15, 16.5, or 18 kV reduced PGC numbers by approximately 50% at stage 28.
    • Total gonadal cell numbers remained unaffected by irradiation across all tested stages and doses.
    • Irradiation did not negatively impact embryo hatchability, with hatch rates increasing with embryo age at exposure.
    • Irradiated gonadal cells showed inhibited PGC proliferation during subsequent culture.

    Conclusions:

    • Soft X-ray irradiation is an effective method for depleting endogenous PGCs in chicken embryos.
    • This technique offers a viable approach to enhance germ cell-mediated transgenesis.
    • The method demonstrates safety, preserving embryo hatchability and somatic cell viability.