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Updated: May 16, 2026
08:16
Utility of Dissociated Intrinsic Hand Muscle Atrophy in the Diagnosis of Amyotrophic Lateral Sclerosis
Published on: March 4, 2014
[Recent advances in facioscapulohumeral muscular dystrophy]
Yukiko K Hayashi1, Kanako Goto, Ichizo Nishio
1Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP).
Rinsho Shinkeigaku = Clinical Neurology
|December 1, 2012
Summary
Facioscapulohumeral muscular dystrophy (FSHD) is a genetic disorder affecting muscles. Research suggests D4Z4 repeat shortening on chromosome 4q35 may cause gene dysregulation, leading to FSHD.
Area of Science:
- Genetics
- Molecular Biology
- Neuromuscular Disorders
Context:
- Facioscapulohumeral muscular dystrophy (FSHD) is a common autosomal dominant neuromuscular disorder.
- Characterized by variable and asymmetrical muscle weakness, primarily affecting facial and shoulder-girdle muscles.
- Current diagnosis relies on Southern blotting, with unclear pathomechanisms.
Purpose:
- To explore potential molecular mechanisms underlying FSHD.
- To investigate the role of D4Z4 repeat array structure and gene expression in FSHD pathogenesis.
- To identify potential therapeutic targets by understanding disease mechanisms.
Summary:
- FSHD is linked to D4Z4 repeat array truncation on chromosome 4q35.
- Shortened D4Z4 repeats may lead to altered chromatin structure, reduced repressor binding, and increased transcription of 4q35 genes, including DUX4.
- Overexpression of these genes has been implicated in muscle pathology.
Impact:
- Provides insights into the molecular underpinnings of FSHD.
- Highlights the potential role of D4Z4 repeat instability and 4q35 gene expression in disease.
- Suggests avenues for future research into diagnostic and therapeutic strategies for FSHD.
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