Anterior trunk muscle shows mix of axial and appendicular developmental patterns.
lateral plate mesoderm
migratory muscle precursors
pectoral fin
posterior hypaxial muscle
sternohyoid
Journal
Developmental dynamics : an official publication of the American Association of Anatomists
ISSN: 1097-0177
Titre abrégé: Dev Dyn
Pays: United States
ID NLM: 9201927
Informations de publication
Date de publication:
10 2019
10 2019
Historique:
received:
29
11
2018
revised:
04
07
2019
accepted:
10
07
2019
pubmed:
7
8
2019
medline:
1
7
2020
entrez:
7
8
2019
Statut:
ppublish
Résumé
Skeletal muscle in the trunk derives from the somites, paired segments of paraxial mesoderm. Whereas axial musculature develops within the somite, appendicular muscle develops following migration of muscle precursors into lateral plate mesoderm. The development of muscles bridging axial and appendicular systems appears mixed. We examine development of three migratory muscle precursor-derived muscles in zebrafish: the sternohyoideus (SH), pectoral fin (PF), and posterior hypaxial (PHM) muscles. We show there is an anterior to posterior gradient to the developmental gene expression and maturation of these three muscles. SH muscle precursors exhibit a long delay between migration and differentiation, PF muscle precursors exhibit a moderate delay in differentiation, and PHM muscle precursors show virtually no delay between migration and differentiation. Using lineage tracing, we show that lateral plate contribution to the PHM muscle is minor, unlike its known extensive contribution to the PF muscle and absence in the ventral extension of axial musculature. We propose that PHM development is intermediate between a migratory muscle mode and an axial muscle mode of development, wherein the PHM differentiates after a very short migration of its precursors and becomes more anterior primarily by elongation of differentiated muscle fibers.
Sections du résumé
BACKGROUND
Skeletal muscle in the trunk derives from the somites, paired segments of paraxial mesoderm. Whereas axial musculature develops within the somite, appendicular muscle develops following migration of muscle precursors into lateral plate mesoderm. The development of muscles bridging axial and appendicular systems appears mixed.
RESULTS
We examine development of three migratory muscle precursor-derived muscles in zebrafish: the sternohyoideus (SH), pectoral fin (PF), and posterior hypaxial (PHM) muscles. We show there is an anterior to posterior gradient to the developmental gene expression and maturation of these three muscles. SH muscle precursors exhibit a long delay between migration and differentiation, PF muscle precursors exhibit a moderate delay in differentiation, and PHM muscle precursors show virtually no delay between migration and differentiation. Using lineage tracing, we show that lateral plate contribution to the PHM muscle is minor, unlike its known extensive contribution to the PF muscle and absence in the ventral extension of axial musculature.
CONCLUSIONS
We propose that PHM development is intermediate between a migratory muscle mode and an axial muscle mode of development, wherein the PHM differentiates after a very short migration of its precursors and becomes more anterior primarily by elongation of differentiated muscle fibers.
Identifiants
pubmed: 31386244
doi: 10.1002/dvdy.95
pmc: PMC6823925
mid: NIHMS1056757
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
961-968Subventions
Organisme : NIAMS NIH HHS
ID : R15 AR066284
Pays : United States
Informations de copyright
© 2019 Wiley Periodicals, Inc.
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