Abnormal myotonic dystrophy protein kinase levels produce only mild myopathy in mice - PubMed (original) (raw)

P J Groenen, D Bächner, P H Jap, M Coerwinkel, F Oerlemans, W van den Broek, B Gohlsch, D Pette, J J Plomp, P C Molenaar, M G Nederhoff, C J van Echteld, M Dekker, A Berns, H Hameister, B Wieringa

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• PMID: 8673131
• DOI: 10.1038/ng0796-316

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Abnormal myotonic dystrophy protein kinase levels produce only mild myopathy in mice

G Jansen et al. Nat Genet. 1996 Jul.

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Abstract

Myotonic dystrophy (DM) is commonly associated with CTG repeat expansions within the gene for DM-protein kinase (DMPK). The effect of altered expression levels of DMPK, which is ubiquitously expressed in all muscle cell lineages during development, was examined by disrupting the endogenous Dmpk gene and overexpressing a normal human DMPK transgene in mice. Nullizygous (-/-) mice showed only inconsistent and minor size changes in head and neck muscle fibres at older age, animals with the highest DMPK transgene expression showed hypertrophic cardiomyopathy and enhanced neonatal mortality. However, both models lack other frequent DM symptoms including the fibre-type dependent atrophy, myotonia, cataract and male-infertility. These results strengthen the contention that simple loss- or gain-of-expression of DMPK is not the only crucial requirement for development of the disease.

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• Model mice and human disease.
  Wynshaw-Boris A. Wynshaw-Boris A. Nat Genet. 1996 Jul;13(3):259-60. doi: 10.1038/ng0796-259. Nat Genet. 1996. PMID: 8673118 No abstract available.

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