Document Detail

Reptilian myotomal myogenesis-lessons from the sand lizard Lacerta agilis L. (Reptilia, Lacertidae)Update.
MedLine Citation:
PMID:  22906593     Owner:  NLM     Status:  Publisher    
Reptilian myotomal myogenesis is poorly understood. This paper reports on structural, ultrastructural and immunocytochemical studies of muscle differentiation in sand lizard (Lacerta agilis) embryos. During somitogenesis, the somites are composed of epithelial vesicles with a centrally located somitocoel. At later developmental stages the ventral portion of the somite cortex disaggregates into the sclerotome mesenchyme, while the dorsal wall of the somite differentiates into dermomyotome. At these developmental stages, mononucleated cells of the dermomyotome are Pax3-positive. The dermomyotome layer forms the dorsomedial and ventromedial lips. The myotome is first composed of mono- and then of multinucleated myotubes and small mononucleated cells that occur in the vicinity of the myotubes. These mononucleated cells exhibit low proliferative potential as revealed by the use of PCNA antibody. At subsequent stages of myogenesis the mononucleated cells express Pax7 protein, a marker of satellite cells, and assume ultrastructural features characteristic of satellite cells. Some of the mononucleated cells contribute to muscle growth, being involved in fusion with differentiating muscle fibers. This study revealed similarities of myotomal myogenesis in reptiles to that of other vertebrates.
Weronika Rupik; Elwira Swadźba; Magda Dubińska-Magiera; Izabela Jędrzejowska; Małgorzata Daczewska
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-17
Journal Detail:
Title:  Zoology (Jena, Germany)     Volume:  -     ISSN:  1873-2720     ISO Abbreviation:  Zoology (Jena)     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9435608     Medline TA:  Zoology (Jena)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier GmbH. All rights reserved.
Department of Animal Histology and Embryology, Silesian University, 9 Bankowa Str., 40-007 Katowice, Poland.
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