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[Molecular diagnosis of Duchenne/Becker muscular dystrophy in Venezuelan patients with the polymerase chain reaction]. 1994

W Delgado Luengo, and L Pineda-Del Villar, and L Borjas, and H Pons, and A Morales, and M C Martínez Basalo, and H B Saldaña
Unidad de Genética Médica, Universidad del Zulia, Maracaibo, Venezuela.

Duchenne and Becker muscular dystrophy (DMD/BMD) are recessive X-linked neuromuscular diseases produced by allelic mutations in the human dystrophin gen. In the present study we determined the 14-deletion prone exons by multiplex PCR in 24 no related venezuelan patients with clinical diagnosis of DMD/BMD. We found 37% of intragenic deletions of which 77% were located at the "hot spot" deletion region that includes exons 44 to 55. The present study show that deletion frequency observed in venezuelan patients resembles some Asian populations and is lower than that observed in Europe and North America. The explanation of the low frequency detected in our patients is beyond the present study, but it is likely that different mutations, ocurring at other regions of the gene is determining a molecular heterogeneity of the DMD/BMD disease in Venezuela.

UI MeSH Term Description Entries
D008297 Male Males
D009136 Muscular Dystrophies A heterogeneous group of inherited MYOPATHIES, characterized by wasting and weakness of the SKELETAL MUSCLE. They are categorized by the sites of MUSCLE WEAKNESS; AGE OF ONSET; and INHERITANCE PATTERNS. Muscular Dystrophy,Myodystrophica,Myodystrophy,Dystrophies, Muscular,Dystrophy, Muscular,Myodystrophicas,Myodystrophies
D002872 Chromosome Deletion Actual loss of portion of a chromosome. Monosomy, Partial,Partial Monosomy,Deletion, Chromosome,Deletions, Chromosome,Monosomies, Partial,Partial Monosomies
D002874 Chromosome Mapping Any method used for determining the location of and relative distances between genes on a chromosome. Gene Mapping,Linkage Mapping,Genome Mapping,Chromosome Mappings,Gene Mappings,Genome Mappings,Linkage Mappings,Mapping, Chromosome,Mapping, Gene,Mapping, Genome,Mapping, Linkage,Mappings, Chromosome,Mappings, Gene,Mappings, Genome,Mappings, Linkage
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014687 Venezuela A country in northern South America, bordering the Caribbean Sea and the North Atlantic Ocean, located between Colombia and Guyana.
D016133 Polymerase Chain Reaction In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships. Anchored PCR,Inverse PCR,Nested PCR,PCR,Anchored Polymerase Chain Reaction,Inverse Polymerase Chain Reaction,Nested Polymerase Chain Reaction,PCR, Anchored,PCR, Inverse,PCR, Nested,Polymerase Chain Reactions,Reaction, Polymerase Chain,Reactions, Polymerase Chain

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