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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Expression of nebulette during early cardiac development.

Nebulette, a cardiac homologue of nebulin, colocalizes with alpha-actinin in the pre-myofibrils of spreading cardiomyocytes and has been hypothesized to play a critical role in the formation of the thin-filament-Z-line complex early during myofibrillogenesis. Data from mesodermal explants or whole tissue mounts of developing hearts suggest that the pattern of myofibrillogenesis in situ may differ from observations of spreading cardiomyocytes. To evaluate the role of nebulette in myofibrillogenesis, we have analyzed the expression of nebulette in chicken heart rudiments by immunoblots and immunofluorescence. We detect the 110 kDa nebulette in heart rudiments derived from stage 9-10 using the anti-nebulin mAb, N114, or polyclonal anti-nebulette Abs by immunoblotting. Immunofluorescence analysis of explants stained with anti-nebulette and anti-alpha-actinin Abs demonstrates that both proteins localize along actin filaments in punctate to continuous manner at early stages of cardiac development and later give rise to striations. In both cases, the punctate staining had a periodicity of approximately 1.0 mum indicating a pre-myofibrils distribution at the earliest time points examined. We demonstrate that nebulette is indeed associated with premyofibrils in very early stages of myofibrillogenesis and suggest that nebulette may play an important role in the formation of these structures. Cell Motil. Cytoskeleton 2007. (c) 2007 Wiley-Liss, Inc.[1]

References

  1. Expression of nebulette during early cardiac development. Esham, M., Bryan, K., Milnes, J., Holmes, W.B., Moncman, C.L. Cell Motil. Cytoskeleton (2007) [Pubmed]
 
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