Ultrastructural changes in LGMD1F

Giovanna Cenacchi, Enrico Peterle, Marina Fanin, Valentina Papa, Roberta Salaroli, Corrado Angelini

Research output: Contribution to journalArticlepeer-review

Abstract

A large Italo-Spanish kindred with autosomal-dominant inheritance has been reported with proximal limb and axial muscle weakness. Clinical, histological and genetic features have been described. A limb girdle muscular dystrophy 1F (LGMD1F) disease locus at chromosome 7q32.1-32.2 has been previously identified. We report a muscle pathological study of two patients (mother and daughter) from this family. Muscle morphologic findings showed increased fiber size variability, fiber atrophy, and acid-phosphatase-positive vacuoles. Immunofluorescence against desmin, myotilin, p62 and LC3 showed accumulation of myofibrils, ubiquitin binding protein aggregates and autophagosomes. The ultrastructural study confirmed autophagosomal vacuoles. Many alterations of myofibrillar component were detected, such as prominent disarray, rod-like structures with granular aspect, and occasionally, cytoplasmic bodies. Our ultrastructural data and muscle pathological features are peculiar to LGMD1F and support the hypothesis that the genetic defect leads to a myopathy phenotype associated with disarrangement of the cytoskeletal network.

Original languageEnglish
Pages (from-to)276-280
Number of pages5
JournalNeuropathology
Volume33
Issue number3
DOIs
Publication statusPublished - Jun 2013

Keywords

  • Electron microscopy
  • Histopathology
  • Limb girdle muscular dystrophy 1F
  • Myofibrillar
  • Myopathy

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Clinical Neurology

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