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MOLECULAR DIAGNOSTICS OF DUCHENNE/BECKER
MUSCULAR DYSTROPHY PATIENTS BY MULTIPLEX
LIGATION-DEPENDENT PROBE AMPLIFICATION
ANALYSIS AND DIRECT SEQUENCING
Todorova A1,*, Guergueltcheva V2, Genova J3, Mihaylova V2, Todorov T1,
Tchamova T2, Georgieva B1, Kremensky I4, Tournev I,2,5 Mitev V1
*Corresponding Author: Albena Todorova, Department of Chemistry and Biochemistry, Medical University Sofia, 2 “Zdrave” str., Sofia 1431, Bulgaria; Tel./Fax: +359-2-9530715; E-mail: todorova_albena@abv.bg page: 3 download article in pdf format
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Abstract
Duchenne/Becker muscular dystrophy (DMD/BMD), the most common X-linked muscular dystrophy is caused by mutations in the enormously large DMD gene. We screened this gene in 51 unrelated Bulgarian DMD/BMD patients and four families with no living index patient available, by multiplex ligation-dependent probe amplification (MLPA) analysis, which is a powerful tool for detecting deletion/duplication along the DMD gene. This, in combination with direct sequencing, characterized the mutation in all patients, which comprised 42 deletions (82%), six duplications (12%) and three point mutations (6%), and precisely determined all deletion/duplication borders. In all the families with no living index patient available, deletions were detected by direct analysis on the patients’ mothers and sisters, proving the value of MLPA for carrier status determination.
Key words: Duchenne/Becker muscular dystrophy (DMB/BMD), DMD gene, Dystrophin, Deletions, Duplications, Point mutations, Multiplex ligation-dependent probe amplification (MLPA) analysis
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1 Department of Chemistry and Biochemistry, Sofia Medical University, Sofia, Bulgaria
2 Clinic of Neurology, Alexandrovska Hospital, Sofia Medical University, Sofia, Bulgaria
3 Genetic Medico-Diagnostic Laboratory “Genica”, Sofia, Bulgaria
4 National Genetic Laboratory, Hospital of Obstetrics and Gynecology, Sofia Medical University, Sofia, Bulgaria
5 Department of Cognitive Science and Psychology, New Bulgarian University, Sofia, Bulgaria
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