Nogo expression in muscle correlates with amyotrophic lateral sclerosis severity
2005
Nogo, a protein inhibiting axonal regeneration, exhibits a characteristic isoform-specific pattern of expression in skeletal muscle of transgenic mice and patients with amyotrophic lateral sclerosis. Here, the increased levels of Nogo-A or Nogo-B in muscle biopsies of 15 amyotrophic lateral sclerosis patients significantly correlated with the severity of clinical disability and with the degree of muscle fiber atrophy. Nogo-A immunoreactivity was observed selectively in atrophic slow-twitch type I fibers. These results suggest that Nogo expression in muscle is a marker of amyotrophic lateral sclerosis severity. Ann Neurol 2005;57:553–556
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