Abstract
Spinal muscular atrophy (SMA) is a degenerative neuromuscular disease associated with progressive symmetric weakness and atrophy of the limb muscles. In view of the involvement of numerous point mutations and deletions associated with the disease, the application of polymorphic markers flanking the SMA critical region could be valuable in molecular diagnosis of the disease. In the present study, D5S351 and D5S1414 polymorphic markers located at the SMA critical region in the Iranian populations were characterized. Genotyping of the markers indicated the presence of six and nine different alleles for D5S351 and D5S1414, respectively. Haplotype frequency estimation in 25 trios families and 75 unrelated individuals indicated the presence of six informative haplotypes with frequency higher than 0.05 in the studied population. Furthermore, the D′ coefficient and the χ2 value for D5S351 and D5S1414 markers revealed the presence of linkage disequilibrium between the two markers in the Iranians. These data suggested that D5S351 and D5S1414 could be suggested as informative markers for linkage analysis and molecular diagnosis of SMA in the Iranian population.
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