Dystrophin gene pre-messenger RNA exon 51 (DMD pre-mRNA exon 51)

The Dystrophin gene pre-messenger RNA (pre-mRNA) exon 51 region is a specific segment of the DMD gene transcript that serves as a therapeutic target for Duchenne muscular dystrophy (DMD). DMD is a severe, X-linked recessive muscle-wasting disease caused by mutations that disrupt the mRNA reading frame, preventing the production of functional dystrophin protein (StatPearls, 2023). Dystrophin is vital for muscle health, acting as a shock absorber that protects muscle cell membranes from damage during contraction (UniProt, 2024). In approximately 13% of DMD patients, skipping exon 51 during the splicing process can restore the reading frame, allowing for the synthesis of a shorter but functional dystrophin protein (FDA, 2016). Drugs like Eteplirsen are designed as antisense oligonucleotides that bind specifically to this exon 51 region, masking it from the spliceosome (Nature Reviews Drug Discovery, 2017). This mechanism effectively converts a severe DMD phenotype into a milder, Becker-like muscular dystrophy phenotype. Clinical monitoring of this target involves measuring dystrophin protein levels in muscle biopsies and assessing motor function through standardized tests like the 6-minute walk test. While this approach is highly specific, challenges include the efficiency of drug delivery to all muscle groups and the potential for long-term renal monitoring associated with oligonucleotide therapies.

Other names

DMD exon 51Dystrophin pre-mRNA exon 51Dystrophin exon 51 regionDMD gene exon 51

Antisense oligonucleotide-mediated exon skipping to restore the open reading frame during mRNA processing.