Duchenne muscular dystrophy:detection of deletion carriers by spectrophotometric densitometry

Nigel G. Laing, Teepu Siddique, Richard Bartlett, Larry H. Yamaoka, Wu‐Yen ‐Y Hung, Margaret A. Pericak‐Vance, Allen D. Roses

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

DNA isolated from a family segregating a deletion in the Duchenne muscular dystrophy gene and control families was digested with restriction enzymes, Southern transferred, and probed with a radioactive dystrophin cDNA probe. The resulting autoradiographs were analyzed with a densitometric spectrophotometer to detect carriers of the deletion. The carrier status of females in the deletion pedigree was independently determined by genomic probes and confirmed by densitometry. In many Duchenne families, deletions will only be observed using cDNA probes which show few restriction fragment length polymorphisms (RFLPs). Such deletions would normally have to be detected using dosage gels. The spectrophotometric densitometry technique used by us does not require dosage gels, and avoids problems arising from non-informative meioses and cross-over. It should be possible to screen every family with an exon deletion by spectrophotometric densitometry provided the presently available cDNA is suitably reduced to produce fewer bands on autoradiographs.

Original languageEnglish (US)
Pages (from-to)393-398
Number of pages6
JournalClinical Genetics
Volume35
Issue number6
DOIs
StatePublished - Jun 1989

Keywords

  • carriers
  • densitometry
  • detection
  • genetic
  • muscular dystrophy (Duchenne)
  • spectrophotometry

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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