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Published on: May 13, 2016
[The hand: embryology and main malformative mechanisms]
J Perrin1, C Geoffroy-Siraudin, C Metzler-Guillemain
1Laboratoire de médecine et biologie de la reproduction et du développement, faculté de médecine de Marseille, boulevard Jean-Moulin, 13005 Marseille, France. Jeanne.Perrin@ap-hm.fr
Chirurgie De La Main
|October 8, 2008
Summary
Limb bud development involves growth factors and HOX transcription factors controlling limb patterning and skeleton formation. This study details embryologic mechanisms behind hand malformations, including genetic and mechanical causes.
Area of Science:
- Developmental biology
- Embryology
- Genetics
Context:
- Limb bud development is a critical process in embryogenesis.
- Formation of the upper limb involves complex signaling pathways.
- Understanding limb development is key to studying congenital malformations.
Purpose:
- To elucidate the embryologic mechanisms governing upper limb development.
- To describe the roles of growth factors and transcription factors in limb patterning.
- To outline the etiologies of common hand malformations.
Summary:
- The upper limb bud forms during the fifth embryonic week from epithelia and mesenchyme.
- Apical ectodermal ridge and zone of polarizing activity secrete growth factors directing limb growth and polarity.
- HOX transcription factors regulate axial skeleton patterning, and their dysregulation can lead to malformations.
Impact:
- Provides a foundational understanding of normal limb development.
- Offers insights into the genetic and mechanical factors underlying hand malformations.
- Contributes to the knowledge base for regenerative medicine and clinical interventions.
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