title: A 15-year molecular analysis of DMD/BMD: genetic features in a large cohort
abstract: Duchenne (DMD) and Becker muscular dystrophies (BMD) are X-linked recessive neuromuscular disorders caused by mutations in the dystrophin gene. In most cohorts, DMD/BMD are due to deletions (60-80%) and duplications (6-10%) involving one or more exons. The remaining cases are caused by different type of point mutations. We analyzed 179 unrelated male patients, 296 women belonging to 137 DMD/BMD families, and 93 independent patients referred for hyperCKemia. We identified 121 deletions and 11 duplications involving one or more exons and one complex rearrangement in the DMD/BMD patients, and 9 deletions in males referred for high levels of serum CK. Carrier status was investigated in 219 female relatives of deleted or duplicated DMD/BMD males, and by linkage analysis in 77 women belonging to families in which the causative mutation was not identified. Four carrier women with clinical manifestations of the disease had unbalanced X inactivation with a degree of X skewing between 70% and 93%. Large cohort studies from different geographic areas may be important for mutation typology comparisons and their appropriate analytical approach.
authors.affiliation: CEINGE Biotecnologie Avanzate, Naples, Italy.
authors.forename: Antonella
authors.initials: A
authors.lastname: Carsana
authors.forename: Giulia
authors.initials: G
authors.lastname: Frisso
authors.forename: Mariano
authors.initials: M
authors.lastname: Intrieri
authors.forename: Maria Roberta
authors.initials: MR
authors.lastname: Tremolaterra
authors.forename: Giovanni
authors.initials: G
authors.lastname: Savarese
authors.forename: Giovanni
authors.initials: G
authors.lastname: Scapagnini
authors.forename: Gabriella
authors.initials: G
authors.lastname: Esposito
authors.forename: Lucio
authors.initials: L
authors.lastname: Santoro
authors.forename: Francesco
authors.initials: F
authors.lastname: Salvatore
mesh_terms: D002874:Chromosome Mapping; D015331:Cohort Studies; D016189:Dystrophin / Q000235:genetics*; D005260:Female; D006580:Genetic Carrier Screening; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D008297:Male; D020388:Muscular Dystrophy, Duchenne / Q000235:genetics*; D016133:Polymerase Chain Reaction; D049951:X Chromosome Inactivation
chemical_list: D016189:Dystrophin