Proteomic Profiling of the Dystrophin-Deficient MDX Heart Reveals Drastically Altered Levels of KeyMetabolic and Contractile Proteins
Lewis, Caroline and Jockusch, Harald and Ohlendieck, Kay (2010) Proteomic Profiling of the Dystrophin-Deficient MDX Heart Reveals Drastically Altered Levels of KeyMetabolic and Contractile Proteins. Journal of Biomedicine and Biotechnology, 2010 (648501). pp. 1-20. ISSN 1110-7243
Although Duchenne muscular dystrophy is primarily classified as a neuromuscular disease, cardiac complications play an important role in the course of this X-linked inherited disorder. The pathobiochemical steps causing a progressive decline in the dystrophic heart are not well understood. We therefore carried out a fluorescence difference in-gel electrophoretic analysis of 9-month-old dystrophin-deficient versus age-matched normal heart, using the established MDX mouse model of muscular dystrophy-related cardiomyopathy. Out of 2,509 detectable protein spots, 79 2D-spots showed a drastic differential expression pattern, with the concentration of 3 proteins being increased, including nucleoside diphosphate kinase and lamin-A/C, and of 26 protein species being decreased, including ATP synthase, fatty acid binding-protein, isocitrate dehydrogenase, NADH dehydrogenase, porin, peroxiredoxin, adenylate kinase, tropomyosin, actin, and myosin light chains. Hence, the lack of cardiac dystrophin appears to trigger a generally perturbed protein expression pattern in the MDX heart, affecting especially energy metabolism and contractile proteins.
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