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

Mannose receptor regulates myoblast motility and muscle growth.

Myoblast fusion is critical for the formation, growth, and maintenance of skeletal muscle. The initial formation of nascent myotubes requires myoblast-myoblast fusion, but further growth involves myoblast-myotube fusion. We demonstrate that the mannose receptor (MR), a type I transmembrane protein, is required for myoblast-myotube fusion. Mannose receptor (MR)-null myotubes were small in size and contained a decreased myonuclear number both in vitro and in vivo. We hypothesized that this defect may arise from a possible role of MR in cell migration. Time-lapse microscopy revealed that MR-null myoblasts migrated with decreased velocity during myotube growth and were unable to migrate in a directed manner up a chemoattractant gradient. Furthermore, collagen uptake was impaired in MR-null myoblasts, suggesting a role in extracellular matrix remodeling during cell motility. These data identify a novel function for MR during skeletal muscle growth and suggest that myoblast motility may be a key aspect of regulating myotube growth.[1]

References

  1. Mannose receptor regulates myoblast motility and muscle growth. Jansen, K.M., Pavlath, G.K. J. Cell Biol. (2006) [Pubmed]
 
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