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Related Experiment Videos

Ectodermal patterning in the avian embryo: epidermis versus neural plate

E Pera1, S Stein, M Kessel

  • 1Max-Planck-Institut für biophysikalische Chemie, Abteilung Molekulare Zellbiologie, D-37077 Göttingen, Germany.

Development (Cambridge, England)
|December 3, 1998
PubMed
Summary
This summary is machine-generated.

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Ectodermal patterning in chick embryos involves signals from the midline and lower layers. The homeobox gene DLX5 marks epidermal development, influenced by factors like BMP4.

Area of Science:

  • Developmental biology
  • Embryology
  • Cell signaling

Background:

  • Ectodermal patterning establishes neural and epidermal fates during chick embryo development.
  • The homeobox gene DLX5 is an early marker for prospective epidermis.

Purpose of the Study:

  • To investigate the signaling mechanisms underlying ectodermal patterning in chick embryos.
  • To elucidate the roles of midline, lower layers, and specific signaling molecules in inducing neural and epidermal fates.

Main Methods:

  • Transplantation of Hensen's nodes and prechordal plates.
  • Grafting of neural plates.
  • Extirpation of endoderm.
  • Co-transplantation of BMP4 beads with node grafts.

Related Experiment Videos

Main Results:

  • Midline structures and neural plate grafts induce DLX5-positive epidermis.
  • Absence of endoderm/mesoderm inhibits neuroepithelium and promotes epidermis.
  • BMP4 and BMP2 can induce epidermal fate, often in cooperation with other signals.
  • DLX5 expression is modulated by signals from both upper and lower embryonic layers.

Conclusions:

  • Ectodermal patterning is a complex process regulated by signaling from embryonic midline and periphery.
  • Signals from lower layers are crucial for neural development and inhibitory for epidermal development.
  • BMP signaling plays a role in epidermal fate induction, potentially in concert with other factors.