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Dev Cell. 2003 Sep;5(3):379-90.

Intrinsic, Hox-dependent cues determine the fate of skeletal muscle precursors.

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  • 1Department of Craniofacial Development, Floor 27 Guy's Tower, King's College London, Guy's Hospital, SE1 9RT, London, United Kingdom.

Abstract

It is generally held that vertebrate muscle precursors depend totally on environmental cues for their development. We show that instead, somites are predisposed toward a particular myogenic program. This predisposition depends on the somite's axial identity: when flank somites are transformed into limb-level somites, either by shifting somitic boundaries with FGF8 or by overexpressing posterior Hox genes, they readily activate the program typical for migratory limb muscle precursors. The intrinsic control over myogenic programs can only be overridden by FGF4 signals provided by the apical ectodermal ridge of a developing limb.

PMID:
12967558
[PubMed - indexed for MEDLINE]
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