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Related Experiment Videos

[Reprogramming and epigenesis].

Nathalie Beaujean1, Catherine Martin, Pascale Debey

  • 1UMR 13-1198, Biologie du développement et reproduction, INRA, 78352 Jouy-en-Josas, France.

Medecine Sciences : M/S
|April 7, 2005
PubMed
Summary
This summary is machine-generated.

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Somatic cell nuclear transfer demonstrates genome plasticity. Epigenetic modifications, including DNA methylation and chromosomal organization, are crucial for reprogramming and embryonic development, though their precise role in cloned animal pathologies requires further study.

Area of Science:

  • Epigenetics
  • Developmental Biology
  • Genomics

Context:

  • Somatic cell nuclear transfer (cloning) and heterokaryons demonstrate nuclear reprogramming capacity.
  • Differentiated nuclei can adopt host cell gene expression patterns.
  • Epigenetic mechanisms underlying nuclear plasticity are not fully understood.

Purpose:

  • To present evidence of epigenetic modifications during nuclear transfer and early embryonic development.
  • To highlight the role of chromatin and cytoplasmic factors in reprogramming.
  • To investigate the link between epigenetic alterations and developmental outcomes.

Summary:

  • Nuclear transfer induces significant changes in large-scale chromosomal organization and DNA methylation patterns.
  • These epigenetic modifications, established in early cell cycles, are essential for embryonic development.

Related Experiment Videos

  • Reprogramming checkpoints include embryonic genome activation and cellular differentiation during implantation.

    • Impact:

    • Epigenetic alterations are critical for successful embryonic development post-nuclear transfer.
    • Defective placental function, potentially linked to epigenetics, may cause pathologies in cloned animals.
    • Further epigenetics studies in cloned animals will elucidate the role of epigenesis in developmental programs.