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Collagen type VI myopathies.

Kate M D Bushby1, James Collins, Debbie Hicks

  • 1Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK, kate.bushby@ncl.ac.uk.

Advances in Experimental Medicine and Biology
|January 21, 2014
PubMed
Summary
This summary is machine-generated.

Mutations in collagen VI genes cause Ullrich congenital muscular dystrophy and Bethlem myopathy. This review details four collagen VI myopathy phenotypes, their diagnostics, genetics, and treatments.

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Area of Science:

  • Biochemistry
  • Genetics
  • Molecular Biology

Background:

  • Collagen VI, a key extracellular matrix component, forms microfibrils associated with cell membranes and basement membranes.
  • It is present in various tissues, including muscle, tendon, skin, cartilage, and intervertebral discs.
  • Mutations in COL6A1, COL6A2, and COL6A3 genes lead to collagen VI-related myopathies.

Purpose of the Study:

  • To review the four recognized clinical phenotypes of collagen VI-related myopathies.
  • To discuss diagnostic criteria, molecular pathogenesis, genetics, and treatment options.
  • To explore related disorders associated with collagen VI mutations.

Main Methods:

  • Literature review of collagen VI-related myopathies.
  • Analysis of genetic mutations and their clinical manifestations.
  • Synthesis of information on diagnostic criteria, pathogenesis, and treatment.

Main Results:

  • Four distinct phenotypes are recognized: Ullrich congenital muscular dystrophy (UCMD), Bethlem myopathy (BM), autosomal dominant limb-girdle muscular dystrophy, and autosomal recessive myosclerosis.
  • These disorders involve combined muscle and connective tissue abnormalities, including weakness, joint laxity, contractures, and skin issues.
  • Recent reports include limb-girdle muscular dystrophy and autosomal recessive myosclerosis phenotypes linked to COL6A2 mutations.

Conclusions:

  • Collagen VI mutations result in a spectrum of myopathies with varying severity.
  • Understanding the genetic basis and clinical features is crucial for diagnosis and management.
  • Further research into treatment strategies for these rare genetic disorders is warranted.