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Related Experiment Videos

Expression of Hex during feather bud development.

Akiko Obinata1, Yoshihiro Akimoto

  • 1Department of Physiological Chemistry, Faculty of Pharmaceutical Sciences, Teikyo University, Sagamiko, Kanagawa, Japan. akiobi@pharm.teikyo-u.ac.jp

The International Journal of Developmental Biology
|September 21, 2005
PubMed
Summary

The proline-rich divergent homeobox gene Hex plays a key role in early feather development. Its expression patterns in chick embryos suggest Hex is crucial for initiating feather bud formation.

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Area of Science:

  • Developmental biology
  • Molecular genetics
  • Embryology

Background:

  • Feather development is a complex process involving intricate signaling pathways.
  • The Wnt signaling pathway is known to be essential for hair and feather follicle development.

Purpose of the Study:

  • To investigate the expression patterns of the Hex/Prh gene during chick embryo feather bud development.
  • To elucidate the role of Hex in the initiation of feather morphogenesis.

Main Methods:

  • Studied Hex mRNA expression using in situ hybridization.
  • Analyzed Hex protein localization via immunohistochemistry and immunoelectron microscopy.
  • Compared Hex expression patterns with Wnt signaling pathway components (Wnt3a, Wnt7a).

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Main Results:

  • Hex mRNA and protein were detected in the dorsal skin, placodes, and developing feather buds.
  • Hex expression was observed in both epidermal and dermal tissues during feather morphogenesis.
  • Hex expression patterns in the epidermis paralleled Wnt7a, but Hex showed broader dermal expression.

Conclusions:

  • Hex is expressed in key tissues and stages of feather bud development.
  • The distinct expression pattern of Hex suggests a significant role in initiating feather morphogenesis, potentially independent of or in conjunction with Wnt signaling in the dermis.