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The clinical, genetic and dystrophin characteristics of Becker muscular dystrophy

II. Correlation of phenotype with genetic and protein abnormalities

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Abstract

We have correlated a detailed clinical assessment of 67 patients with proven Becker muscular dystrophy with the results from genetic and protein analyses. There was an overall deletion frequency of 80%, rising to 92.6% in the large group of patients defined on clinical grounds as being of “typically” mild severity. The deletions in this group were all clustered in the region of the gene between exons 45 and 59; the most common deletion was of exons 45–47 and all but one started at exon 45. No similar deletions were seen in the patients with more severe disease, in whom the diverse genetic defects included a duplication and a very large deletion. Dystrophin patterns in the “typical” group were also very characteristic, and in both groups were as predicted from the genetic defect, the size of deletions being inversely proportional to the size of the protein produced.

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Authors and Affiliations

  1. Department of Human Genetics, 19/20 Claremont Place, NE2 4AA, Newcastle upon Tyne, UK

    K. M. D. Bushby, L. V. B. Nicholson, I. D. Haggerty, N. J. Cleghorn & S. S. Bhattacharyal

  2. Children's Department, Newcastle General Hospital, Westgate Road, Newcastle upon Tyne, UK

    D. Gardner-Medwin

  3. Muscular Dystrophy Group Laboratories, Newcastle General Hospital, Westgate Road, Newcastle upon Tyne, UK

    M. A. Johnson & J. B. Harris

Authors
  1. K. M. D. Bushby
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  2. D. Gardner-Medwin
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  3. L. V. B. Nicholson
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  4. M. A. Johnson
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  6. N. J. Cleghorn
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  7. J. B. Harris
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  8. S. S. Bhattacharyal
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Bushby, K.M.D., Gardner-Medwin, D., Nicholson, L.V.B. et al. The clinical, genetic and dystrophin characteristics of Becker muscular dystrophy. J Neurol 240, 105–112 (1993). https://doi.org/10.1007/BF00858726

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  • DOI: https://doi.org/10.1007/BF00858726

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