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

Expression of phosphotyrosine and SNAP-25 immunoreactivity in grumose (foamy) spheroid bodies suggests axonal regeneration.

To investigate the origin of grumose (foamy) spheroid bodies (GFSB), the expression of two proteins associated with axonal regeneration, i.e., phosphotyrosine and 25-kDa synaptosomal-associated protein (SNAP-25), was immunohistochemically assessed in GFSB in the substantia nigra pars reticulate (SNPR) of progressive supranuclear palsy (PSP). Phosphotyrosine immunoreactive (-IR) and SNAP-25-IR were found in many GFSB. Both were expressed intensely on eosinophilic debris and grumose aggregates in GFSB. Our result suggests that GFSB are structures associated with aberrant sprouting of axons in the degenerated SNPR from other regions such as the globus pallidus to the SNPR, and that the aberrant sprouting may be associated with cell signaling involving tyrosine kinase systems.[1]

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