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Related Experiment Videos

Skeletal muscle pathology in systemic sclerosis

E E Calore1, M J Cavaliere, N M Perez

  • 1Anatomia Patológica, Instituto de Infectologia Emílio Ribas, São Paulo, Brazil.

The Journal of Rheumatology
|December 1, 1995
PubMed
Summary

Systemic sclerosis (SSc) muscle weakness may stem from neurogenic causes. This study found neural cell adhesion molecule (NCAM) in muscle fibers of SSc patients, suggesting more frequent nerve involvement than previously understood.

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Area of Science:

  • Rheumatology
  • Neurology
  • Pathology

Background:

  • Systemic sclerosis (SSc) involves collagen deposition and visceral issues.
  • Muscle weakness is a common, variable complication in SSc patients.
  • Progressive muscle involvement in SSc warrants detailed pathological investigation.

Purpose of the Study:

  • To investigate muscle pathology in patients with systemic sclerosis (SSc).
  • To determine the presence and extent of neurogenic involvement in SSc-related muscle weakness.

Main Methods:

  • Histochemical and immunohistochemical techniques were employed.
  • The study focused on detecting neural cell adhesion molecule (NCAM) expression in muscle tissue.

Main Results:

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  • Neural cell adhesion molecule (NCAM) was expressed in five out of six SSc cases.
  • NCAM expression was observed in atrophic, angulated muscle fibers.
  • Some affected fibers showed intense staining with oxidative enzymes, indicating fiber damage.

Conclusions:

  • Neurogenic involvement is a more frequent complication of systemic sclerosis than currently reported.
  • The findings suggest a potential neuropathic component contributing to muscle weakness in SSc.
  • Further research into neurogenic mechanisms in SSc is warranted.