Analysis of skeletal muscle function in the C57BL6/SV129 syncoilin knockout mouse

Syncoilin is a 64-kDa intermediate filament protein expressed in skeletal muscle and enriched at the perinucleus, sarcolemma, and myotendinous and neuromuscular junctions. Due to its pattern of cellular localization and binding partners, syncoilin is an ideal candidate to be both an important struct...

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Bibliographic Details
Published in:	Mammalian genome Vol. 19; no. 5; pp. 339 - 351
Main Authors:	McCullagh, Karl J. A., Edwards, Ben, Kemp, Matthew W., Giles, Laura C., Burgess, Matthew, Davies, Kay E.
Format:	Journal Article
Language:	English
Published:	New York Springer-Verlag 01-05-2008 Springer Nature B.V
Subjects:	Animal Genetics and Genomics Animals Biomedical and Life Sciences Cell Biology Female Gene Targeting Human Genetics Intermediate Filament Proteins - analysis Intermediate Filament Proteins - genetics Intermediate Filament Proteins - metabolism Life Sciences Male Mice Mice, Inbred C57BL Mice, Knockout Muscle Contraction - genetics Muscle Contraction - physiology Muscle Development - genetics Muscle Proteins - analysis Muscle Proteins - genetics Muscle Proteins - metabolism Muscle, Skeletal - cytology Muscle, Skeletal - metabolism Muscle, Skeletal - physiology Protein Binding Regeneration - genetics Evans Blue Staining Extensor Digitorum Longus Extensor Digitorum Longus Muscle Serum Creatine Kinase Level Intermediate Filament
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Summary:	Syncoilin is a 64-kDa intermediate filament protein expressed in skeletal muscle and enriched at the perinucleus, sarcolemma, and myotendinous and neuromuscular junctions. Due to its pattern of cellular localization and binding partners, syncoilin is an ideal candidate to be both an important structural component of myocytes and a potential mediator of inherited myopathies. Here we present a report of a knockout mouse model for syncoilin and the results of an investigation into the effect of a syncoilin null state on striated muscle function in 6–8-week-old mice. An analysis of proteins known to associate with syncoilin showed that ablation of syncoilin had no effect on absolute expression or spatial localization of desmin or alpha dystrobrevin. Our syncoilin-null animal exhibited no differences in cardiotoxin-induced muscle regeneration, voluntary wheel running, or enforced treadmill exercise capacity, relative to wild-type controls. Finally, a mechanical investigation of isolated soleus and extensor digitorum longus indicated a potential differential reduction in muscle strength and resilience. We are the first to present data identifying an increased susceptibility to muscle damage in response to an extended forced exercise regime in syncoilin-deficient muscle. This study establishes a second viable syncoilin knockout model and highlights the importance of further investigations to determine the role of syncoilin in skeletal muscle.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0938-8990 1432-1777
DOI:	10.1007/s00335-008-9120-2