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DNA deletions in mild and severe Becker muscular dystrophy

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Summary

The DNA of 33 patients diagnosed as suffering from Becker muscular dystrophy (BMD) has been probed with cloned DNA sequences from Xp21, known to reveal DNA deletions in patients suffering from the more severe Duchenne muscular dystrophy (DMD). Two BMD cases showed clear deletions. A third case gave aberrant band sizes, which further analysis showed to be caused by a small deletion. This suggests that deletions in DXS164 occur approximately as frequently in BMD as they do in DMD. Of the two cases showing large deletions, one is at the severe end of the Becker clinical spectrum, whilst the other is a classical Becker-type dystrophy. The fact that loci defined by probes commonly deleted in classical DMD patients are also deleted in BMD patients of varying severity is strong additional evidence that these disorders are allelic, and further justifies the use of probes with defined linkage relationships to DMD also being used for counselling in BMD families.

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Correspondence to Martin Bobrow.

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Hart, K.A., Hodgson, S., Walker, A. et al. DNA deletions in mild and severe Becker muscular dystrophy. Hum Genet 75, 281–285 (1987). https://doi.org/10.1007/BF00281075

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Keywords

  • Metabolic Disease
  • Muscular Dystrophy
  • Duchenne Muscular Dystrophy
  • Large Deletion
  • Clinical Spectrum