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Novel large deletion in the ACTA1 gene in a child with autosomal recessive nemaline myopathy.

Abstract
Nemaline myopathy (NM) is a genetically and clinically heterogeneous disorder resulting from a disruption of the thin filament proteins of the striated muscle sarcomere. The disorder is typically characterized by muscle weakness including the face, neck, respiratory, and limb muscles and is clinically classified based on the age of onset and severity. Mutations in the ACTA1 gene contribute to a significant proportion of NM cases. The majority of ACTA1 gene mutations are missense mutations causing autosomal dominant NM by producing an abnormal protein. However, approximately 10% of ACTA1 gene mutations are associated with autosomal recessive NM; these mutations are associated with loss of protein function. We report the first case of a large deletion in the ACTA1 gene contributing to autosomal recessive NM. This case illustrates the importance of understanding disease mechanisms at the molecular level to accurately infer the inheritance pattern and potentially aid with clinical management.
AuthorsBethany Friedman, Kara Simpson, Carolina Tesi-Rocha, Delu Zhou, Cheryl A Palmer, Sharon F Suchy
JournalNeuromuscular disorders : NMD (Neuromuscul Disord) Vol. 24 Issue 4 Pg. 331-4 (Apr 2014) ISSN: 1873-2364 [Electronic] England
PMID24447884 (Publication Type: Case Reports, Journal Article)
CopyrightCopyright © 2014. Published by Elsevier B.V.
Chemical References
  • Actins
Topics
  • Actins (genetics)
  • Child, Preschool
  • DNA Mutational Analysis
  • Female
  • Humans
  • Muscle, Skeletal (pathology)
  • Myopathies, Nemaline (genetics, pathology)
  • Sequence Deletion

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