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. 1987 Aug;41(2):128–137.

DNA studies in a family with Duchenne muscular dystrophy and a deletion at Xp21.

C R Greenberg, J L Hamerton, M Nigli, K Wrogemann
PMCID: PMC1684214  PMID: 3475976

Abstract

We have performed Southern blot analysis on a large, four-generation kindred with Duchenne muscular dystrophy (DMD). Probes 754 (DXS 84), pERT87-1, pERT87-8, pERT87-15 (DXS164), and pXJ-1.1 did not hybridize to digested genomic DNA of affected males. Obligate-carrier mothers and unaffected brothers showed signals of a single X-chromosome copy intensity, and suspected noncarrier sisters demonstrated either a single band of two-copy intensity or informative polymorphisms. Uniform hybridization was seen with probes C7 (DXS28) and D2 (DXS43), which map distal to the DMD locus, and with OTC, which maps proximally. This deletion was present in six affected individuals and has been transmitted through 3 generations to date. On high-resolution chromosome analysis, a deletion within band Xp21 was consistently observed in one affected male studied and in one of the two X chromosomes in obligate carriers. This large molecular and cytogenetically visible deletion in affected DMD individuals without glycerol kinase deficiency, chronic granulomatous disease, retinitis pigmentosa (RP), or ornithine transcarbamylase deficiency is a very rare finding and should prove useful in specifically cloning additional probes within and flanking the DMD locus.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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