| MyoD and Myogenin expression during myogenic phases in brown trout: a precocious onset of mosaic hyperplasia is a prerequisite for fast somatic growth. | |
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MedLine Citation:
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PMID: 17315228 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Muscle cell recruitment (hyperplasia) during myogenesis in the vertebrate embryo is known to occur in three consecutive phases. In teleost fish (including zebrafish), however, information on myogenic precursor cell activation is largely fragmentary, and comprehensive characterization of the myogenic phases has only been fully undertaken in a single slow-growing cyprinid species by examination of MEF2D expression. Here, we use molecular techniques to provide a comprehensive characterization of MyoD and Myogenin expression during myogenic cell activation in embryos and larvae of brown trout, a fast-growing salmonid with exceptionally large embryos. Results confirm the three-phase pattern, but also demonstrate that the second and third phases begin simultaneously and progress vigorously, which is different from the previously described consecutive activation of these phases. Furthermore, we suggest that Pax7 is expressed in myogenic progenitor cells that account for second- and third-phase myogenesis. These findings are discussed in relation to teleost myotome development and to teleost growth strategies. |
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Authors:
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P Steinbacher; J R Haslett; A Obermayer; J Marschallinger; H C Bauer; A M Sänger; W Stoiber |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Developmental dynamics : an official publication of the American Association of Anatomists Volume: 236 ISSN: 1058-8388 ISO Abbreviation: Dev. Dyn. Publication Date: 2007 Apr |
Date Detail:
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Created Date: 2007-04-30 Completed Date: 2007-07-30 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9201927 Medline TA: Dev Dyn Country: United States |
Other Details:
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Languages: eng Pagination: 1106-14 Citation Subset: IM |
Affiliation:
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Division of Zoology and Functional Anatomy, Department of Organismic Biology, University of Salzburg, Salzburg, Austria. peter.steinbacher@sbg.ac.at |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cell Proliferation* Embryo, Nonmammalian Gene Expression Regulation, Developmental Muscle Development / genetics* Muscle Fibers, Skeletal / cytology MyoD Protein / genetics*, metabolism Myogenin / genetics*, metabolism Myosin Heavy Chains / genetics, metabolism Trout / embryology*, genetics* |
| Chemical | |
Reg. No./Substance:
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0/MyoD Protein; 0/Myogenin; 0/Myosin Heavy Chains |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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