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Deletion of EXON46,47 gene with DMD. EXON SKIPPING THERAPY?

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IF A boy with DMD gets a genetic result back saying he is homozygous for deletion of exon 46 and 47 of the DMD gene what does that mean? can he have the exon skipping therapy?

Category: Neurologist, Medical

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Category: Pediatric Neurologist
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Deletion of exon 46 and 47 means that a part of dystrophin gene is missing and hence, dystrophin protein can not be formed, resulting in Duchenne muscular dystrophy (DMD). There are totally 79 exons in dystrophin gene.
Exon skipping therapy in DMD is in experimental stage and early phase trials have shown promise. Phase II and III clinical trials need to show efficacy and safety, for it to be approved for clinical use.
In exon skipping therapy, an exon is removed so that the two ends of the dystrophin gene fit (in this case exon 45 may fit into exon 49, after exon 48 is removed/skipped), and dystrophin protein formation can be resumed.
I hope it helps.
Best wishes,

Dr. Sudhir Kumar
Category: Pediatric Neurologist
Senior Residency, Fellowship: DM, Neurology, CMC, Vellore, 2001
Junior Residency: MD, Internal Medicine, CMC, Vellore, 1998
Medical School: MBBS, Christian Medical College, Vellore, 1995
Dr. Sudhir Kumar and 4 other Medical Specialists are ready to help you

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