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Mitochondrial abnormalities in oculopharyngeal muscular dystrophy
R Pauzner1, I Blatt, M Mouallem
1Department of Internal Medicine E, Chaim Sheba Medical Center, Tel Hashomer, Israel.
Muscle & Nerve
|October 1, 1991
Summary
Oculopharyngeal muscular dystrophy (OPMD) may be a heterogeneous syndrome. Muscle biopsies revealed abnormal mitochondria, suggesting OPMD could manifest as a mitochondrial myopathy.
Area of Science:
- Neurology
- Genetics
- Cell Biology
Background:
- Oculopharyngeal muscular dystrophy (OPMD) is a rare genetic disorder.
- Characterized by ptosis, dysphagia, and proximal limb weakness.
- Typically presents in adulthood.
Observation:
- A family exhibiting OPMD was studied.
- Muscle biopsies underwent histological, histochemical, and electron microscopy analysis.
- No "ragged-red" fibers or intranuclear inclusions were observed.
Findings:
- Histological and histochemical studies showed nonspecific myopathic changes.
- Electron microscopy revealed bizarre, enlarged mitochondria with aberrant cristae.
- These ultrastructural findings suggest a mitochondrial component.
Implications:
- The observed mitochondrial abnormalities challenge the traditional view of OPMD.
- Findings support OPMD as a potentially heterogeneous syndrome.
- Suggests a possible link between OPMD and mitochondrial myopathies, warranting further investigation.