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( Florencia Giliberto ),( Veronica Ferreiro ),( Viviana Dalamon ),( Ezequiel Surace ),( Javier Cotignola ),( Sebastian Esperante ),( Daniel Borelina ),( Sergio Baranzini ),( Irene Szijan ) 생화학분자생물학회 2003 BMB Reports Vol.36 No.2
Duchenne muscular dystrophy (DMD) is the most common hereditary neuromuscular disease. It is inherited as an X-linked recessive trait in which males show clinical manifestations. In some rare cases, the disease can also be manifested in females. The aim of the present study was to determine the molecular alteration in two cases of non-related DMD symptomatic carriers with no previous history of DMD. Multiplex PCR is commonly used to search for deletion in the DMD gene of affected males. This method could not be used in females because the normal X chromosome masks the deletion of the mutated one. Therefore, we used a set of seven highly polymorphic dinucleotide (CA), repeat markers that lie within the human dystrophin gene. The deletions were evidenced by hemizygosity of the loci under study. We localized a deletion in the locus 7A (intron 7) on the maternal X chromosome in one case, and a deletion in the region of introns 49 and 50 on the paternal X chromosome in the other. The use of microsatellite genotyping within the DMD gene enables the detection of the mutant allele in female carriers. It is also a useful method to provide DMD families with more accurate genetic counseling.
Giliberto, Florencia,Ferreiro, Veronica,Dalamon, Viviana,Surace, Ezequiel,Cotignola, Javier,Esperante, Sebastian,Borelina, Daniel,Baranzini, Sergio,Szijan, Irene Korean Society for Biochemistry and Molecular Biol 2003 Journal of biochemistry and molecular biology Vol.36 No.2
Duchenne muscular dystrophy (DMD) is the most common hereditary neuromuscular disease. It is inherited manifestations. In some rare cases, the disease can also be manifested in females. The aim of the present study was to determine the molecular alteration in two cases of nonrelated DMD symptomatic carriers with no previous history of DMD. Multiplex PCR is commonly used to search for deletion in the DMD gene of affected males. This method could not be used in females because the normal X chromosome masks the deletion of the mutated one. Therefor, we used a set of seven highly polymorphic dinucleotide $(CA)_n$ repeat markers that lie within the human dystrophin gene. The deletions were evidenced by hemizygosity of the loci under study. We localized a deletion in the locus 7A (intron 7) on the maternal X chromosome in one case, and a deletion in the region of introns 49 and 50 on the paternal X chromosome in the other. The use of microsatellite genotyping within the DMD gene enables the detection of the mutant allele in female carriers. It is also a useful method to provide DMD families with more accurate genetic counseling.