Abstract
Myotonic dystrophy (DM) is an autosomal dominant disorder resulting from the expansion of a CTG repeat in the 3′ untranslated region of a putative protein kinase (DMPK). To elucidate the role of DMPK in DM pathogenesis we have developed DMPK deficient (DMPK−/−) mice. DMPK−/− mice develop a late-onset, progressive skeletal myopathy that shares some pathological features with DM. Muscles from mature mice show variation in fibre size, increased fibre degeneration and fibrosis. Adult DMPK−/− mice show ultrastructural changes in muscle and a 50% decrease in force generation compared to young mice. Our results indicate that DMPK may be necessary for the maintenance of skeletal muscle structure and function and suggest that a decrease in DMPK levels may contribute to DM pathology.
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Reddy, S., Smith, D., Rich, M. et al. Mice lacking the myotonic dystrophy protein kinase develop a late onset progressive myopathy. Nat Genet 13, 325–335 (1996). https://doi.org/10.1038/ng0796-325
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DOI: https://doi.org/10.1038/ng0796-325
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