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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26780

Title: Overexpression of Myostatin2 in zebrafish reduces the expression of dystrophin associated protein complex (DAPC) which leads to muscle dystrophy
Authors: Aseervatham Anusha Amali;Cliff Ji-Fan Lin;Yi-Hsuan Chen;Wei-Lun Wang;Hong-Yi Gong;Ravikumar Deepa Rekha;Jenn-Kan Lu;Thomas T. Chen;Jen-Leih Wu
Contributors: 國立臺灣海洋大學:水產養殖學系
Keywords: Myostatin;Muscle attachment;Muscular dystrophy;DAPC;Muscle development
Date: 2008-09-01
Issue Date: 2011-10-21T02:18:38Z
Publisher: Journal of Biomedical Science
Abstract: Abstract:Myostatin, a member of the TGF-β superfamily, is a potent negative regulator of skeletal muscle and growth. Previously, we reported Mstn1 from zebrafish and studied its influence on muscle development. In this study, we identified another form of Myostatin protein which is referred to as Mstn2. The size of Mstn2 cDNA is 1342 bp with 109 and 132 bp of 5′ and 3′-untranslated regions (UTRs), respectively. The coding region is 1101 bp encoding 367 amino acids. The identity between zebrafish Mstn1 and 2 is 66%. The phylogenetic tree revealed that the Mstn2 is an ancestral form of Mstn1. To study the functional aspects, we overexpressed mstn2 and noticed that embryos became less active and the juveniles with bent and curved phenotypes when compared to the control. The RT-PCR and in situ hybridization showed concurrent reduction of dystrophin associated protein complex (DAPC). In cryosection and in situ hybridization, we observed the disintegration of somites, lack of transverse myoseptum and loss of muscle integrity due to the failure of muscle attachment in mstn2 overexpressed embryos. Immunohistochemistry and western blot showed that there was a reduction of dystrophin, dystroglycan and sarcoglycan at translational level in overexpressed embryos. Taken together, these results indicate the suitability of zebrafish as an excellent animal model and our data provide the first in vivo evidence of muscle attachment failure by the overexpression of mstn2 and it leads to muscle loss which results in muscle dystrophy that may contribute to Duchenne syndrome and other muscle related diseases.
Relation: 15(5), pp.595-604
URI: http://ntour.ntou.edu.tw/handle/987654321/26780
Appears in Collections:[水產養殖學系] 期刊論文

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