Specification of the hypaxial musculature

Susanne Dietrich, Frank R. Schubert, Chris Healy, Paul T. Sharpe, Andrew Lumsden

Research output: Contribution to journalArticlepeer-review


During development of the amniote embryo, the dorsolateral territory of the somite is destined to give rise to the hypaxial skeletal musculature. To study the mechanisms that lead to the formation of this musculature, we cloned the chick Lbx1 gene that is specific to prospective hypaxial myoblasts at occipital, cervical and limb levels. Using this gene as a marker, we characterised the anatomical structures that produce the signals necessary for the specification of the hypaxial musculature by ablating them or transplanting them to ectopic locations in the chick embryo. In addition, we inserted BMP4 soaked beads medial to the somite. Our data suggest that lateralising signals from intermediate and lateral mesoderm have to synergise with dorsalising signals from the surface ectoderm to induce the formation of the hypaxial musculature. However, the lateralising function of the lateral mesoderm can only in part be mimicked by BMP4.

Original languageEnglish
Pages (from-to)2235-49
Issue number12
Publication statusPublished - Jun 1998


  • Animals
  • Avian Proteins
  • Base Sequence
  • Body Patterning
  • Bone Morphogenetic Protein 4
  • Bone Morphogenetic Proteins
  • Central Nervous System
  • Chick Embryo
  • Cloning, Molecular
  • DNA-Binding Proteins
  • Ectoderm
  • Gene Expression Regulation, Developmental
  • Genes, Homeobox
  • Mesoderm
  • Molecular Sequence Data
  • Muscle Proteins
  • Muscle, Skeletal
  • Notochord
  • Paired Box Transcription Factors
  • Sequence Alignment
  • Transcription Factors
  • Transplantation, Heterotopic


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