Fetus-like dystrophin expression and other cytoskeletal protein abnormalities in centronuclear myopathies

M. Mora, L. Morandi, L. Merlini, G. Vita, A. Baradello, R. Barresi, C. Di Blasi, F. Blasevich, M. Gebbia, S. Daniel, F. Cornelio

Research output: Contribution to journalArticle

Abstract

We have investigated supposed maturational arrest of muscle in centronuclear myopathies (CNMs) by characterizing the expression of dystrophin, other cytoskeletal proteins, and fetal myosin in the muscle fibers of 9 CNM patients (4 sporadic, 3 familial, 2 adult sporadic). Dystrophin and β-spectrin localized intracytoplasmically in centrally nucleated fibers. Talin and vinculin were normally expressed. Desmin was radially organized in several fibers in all patients. Scattered vimentin- positive fibers were found in 3 cases. Six myotonic dystrophy cases and 4 inflammatory myopathy cases with regenerating fibers were also studied: dystrophin and the membrane cytoskeletal proteins were normally expressed in the former; and dystrophin, spectrin, and vinculin were reduced in the latter. Intracytoplasmic dystrophin is further evidence of maturational arrest in CNMs. Spectrin and dystrophin codistribute in these pathological conditions as in normal muscle. We conclude that the altered cytoskeletal network found in CNMs likely plays a pathogenetic role in these conditions.

Original languageEnglish
Pages (from-to)1176-1184
Number of pages9
JournalMuscle and Nerve
Volume17
Issue number10
DOIs
Publication statusPublished - 1994

Keywords

  • centronuclear myopathies
  • cytoskeletal proteins
  • dystrophin
  • muscle fiber regeneration
  • myotonic dystrophy

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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    Mora, M., Morandi, L., Merlini, L., Vita, G., Baradello, A., Barresi, R., Di Blasi, C., Blasevich, F., Gebbia, M., Daniel, S., & Cornelio, F. (1994). Fetus-like dystrophin expression and other cytoskeletal protein abnormalities in centronuclear myopathies. Muscle and Nerve, 17(10), 1176-1184. https://doi.org/10.1002/mus.880171008