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Duchenne Muscular Dystrophy (DMD) and Becker Muscular Dystrophy (BMD) are devastating
disorders which result from mutations in the gene that encodes dystrophin, a skeletal
muscle protein. We have developed a method to rapidly, robustly, and economically
perform direct sequence analysis of the entire coding and regulatory regions of the
dystrophin gene, greatly expediting the characterization of mutations of many dystrophinopathy
patients. In addition, this direct sequence analysis allows us to determine whether
variations in the gene which are not known to be disease-causing (called "polymorphisms")
have some influence on the severity or course of the disease.
Using this methodology in a project funded by the National Institutes of Health,
we will identify the mutations responsible for DMD and BMD in a large cohort of patients.
From this same cohort, we will obtain a standardized and thorough phenotypic characterization
by performing standardized clinical examinations. By correlating the genetic variation
with severity of disease, we hope to gain a better understanding of how genetic mechanisms
influence the disease.
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