Journal
TRENDS IN CARDIOVASCULAR MEDICINE
Volume 10, Issue 6, Pages 268-272Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/S1050-1738(00)00075-X
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Duchenne muscular dystrophy patients lack the protein dystrophin which is an essential link in the complex of proteins that connect the cytoskeleton to the extracellular matrix. In mechanically stressed tissues such as muscle, transient sarcolemmal microdisruptions are normal, but in dystrophic muscle cells the frequency of these microdisruptions is greatly increased. Although both normal and dystrophic cells are able to actively repair these microdisruptions, calcium entry through the more frequent sarcolemmal microdisruptions of dystrophic cells results in an increased calcium-dependent proteolysis that alters the activity of the calcium leak channel. The accumulation of abnormally active calcium leak channels over time results in a gradual loss of calcium homeostasis and eventual cell death. (Trends Cardiovasc Med 2000; 10:268-272). (C) 2001, Elsevier Science Inc.
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