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Collagen VI related muscle disorders
1Institute of Human Genetics, University of Newcastle upon Tyne, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ. anne.lampe@ncl.ac.uk
Journal of Medical Genetics
|September 6, 2005
Summary
Collagen VI gene mutations cause Bethlem myopathy and Ullrich congenital muscular dystrophy, previously distinct disorders. This review covers their phenotypes, diagnosis, management, and pathogenesis.
Area of Science:
- Genetics
- Molecular Biology
- Neurology
Background:
- Mutations in collagen VI genes (COL6A1, COL6A2, COL6A3) are linked to Bethlem myopathy (BM) and Ullrich congenital muscular dystrophy (UCMD).
- BM is a mild, dominantly inherited disorder with proximal weakness and distal contractures.
- UCMD is a severe, autosomal recessive condition with proximal contractures and distal hyperlaxity.
Purpose of the Study:
- To review the clinical phenotypes, diagnosis, and management of collagen VI-related disorders.
- To provide an overview of the pathogenesis of BM and UCMD.
Main Methods:
- Literature review of clinical phenotypes.
- Review of diagnostic criteria.
- Summary of current knowledge on pathogenesis.
Main Results:
- BM and UCMD, previously considered separate, are now understood as part of a collagen VI-related spectrum.
- Clinical presentation varies from mild (BM) to severe (UCMD).
Conclusions:
- Collagen VI disorders represent a spectrum of related myopathies.
- Understanding the shared genetic basis is crucial for diagnosis and management.