dc.creatorde Almeida F.L.A.
dc.creatorCarvalho R.F.
dc.creatorPinhal D.
dc.creatorPadovani C.R.
dc.creatorMartins C.
dc.creatorDal Pai-Silva M.
dc.date2008
dc.date2015-06-30T19:34:39Z
dc.date2015-11-26T14:45:39Z
dc.date2015-06-30T19:34:39Z
dc.date2015-11-26T14:45:39Z
dc.date.accessioned2018-03-28T21:54:56Z
dc.date.available2018-03-28T21:54:56Z
dc.identifier
dc.identifierMicron. , v. 39, n. 8, p. 1306 - 1311, 2008.
dc.identifier9684328
dc.identifier10.1016/j.micron.2008.02.011
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-52049105394&partnerID=40&md5=14caf4894cd461c94e4df133aab9ac71
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/106724
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/106724
dc.identifier2-s2.0-52049105394
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1252541
dc.descriptionSkeletal muscle is the edible part of the fish. It grows by hypertrophy and hyperplasia, events regulated by differential expression of myogenic regulatory factors (MRFs). The study of muscle growth mechanisms in fish is very important in fish farming development. Pacu (Piaractus mesopotamicus) is one of the most important food species farmed in Brazil and has been extensively used in Brazilian aquaculture programs. The aim of this study was to analyze hyperplasia and hypertrophy and the MRF MyoD expression pattern in skeletal muscle of pacu (P. mesopotamicus) during juvenile and adult growth stages. Juvenile (n = 5) and adult (n = 5) fish were anaesthetized, sacrificed, and weight (g) and total length (cm) determined. White dorsal region muscle samples were collected and immersed in liquid nitrogen. Transverse sections (10 μm thick) were stained with Haematoxilin-Eosin (HE) for morphological and morphometric analysis. Smallest fiber diameter from 100 muscle fibers per animal was calculated in each growth phase. These fibers were grouped into three classes (<20, 20-50, and >50 μm) to evaluate hypertrophy and hyperplasia in white skeletal muscle. MyoD gene expression was determined by semi-quantitative RT-PCR. PCR products were cloned and sequenced. Juvenile and adult pacu skeletal muscle had similar morphology. The large number of <20 μm diameter muscle fibers observed in juvenile fish confirms active hyperplasia. In adult fish, most fibers were over 50 μm diameter and denote more intense muscle fiber hypertrophy. The MyoD mRNA level in juveniles was higher than in adults. A consensus partial sequence for MyoD gene (338 base pairs) was obtained. The Pacu MyoD nucleotide sequence displayed high similarity among several vertebrates, including teleosts. The differential MyoD gene expression observed in pacu white muscle is possibly related to differences in growth patterns during the phases analyzed, with hyperplasia predominant in juveniles and hypertrophy in adult fish. These results should provide a foundation for understanding the molecular control of skeletal muscle growth in economically important Brazilian species, with a view to improving production quality. © 2008 Elsevier Ltd. All rights reserved.
dc.description39
dc.description8
dc.description1306
dc.description1311
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dc.languageen
dc.publisher
dc.relationMicron
dc.rightsfechado
dc.sourceScopus
dc.titleDifferential Expression Of Myogenic Regulatory Factor Myod In Pacu Skeletal Muscle (piaractus Mesopotamicus Holmberg 1887: Serrasalminae, Characidae, Teleostei) During Juvenile And Adult Growth Phases
dc.typeArtículos de revistas


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