10.1046/j.1432-1327.2000.01566.x
Crossref journal-article
Wiley
European Journal of Biochemistry (311)
Abstract

Transient elevations of intracellular Ca2+ play a signalling role in such complex cellular functions as contraction, secretion, fertilization, proliferation, metabolism, heartbeat and memory. However, prolonged elevation of Ca2+ above about 10 µm is deleterious to a cell and can activate apoptosis. In muscle, there is a narrow window of Ca2+ dysregulation in which abnormalities in Ca2+ regulatory proteins can lead to disease, rather than apoptosis. Key proteins in the regulation of muscle Ca2+ are the voltage‐dependent, dihydropyridine‐sensitive, l‐type Ca2+ channels located in the transverse tubule and Ca2+ release channels in the junctional terminal cisternae of the sarcoplasmic reticulum. Abnormalities in these proteins play a key role in malignant hyperthermia (MH), a toxic response to anesthetics, and in central core disease (CCD), a muscle myopathy. Sarco(endo)plasmic reticulum Ca2+ ATPases (SERCAs) return sarcoplasmic Ca2+ to the lumen of the sarcoplasmic reticulum. Loss of SERCA1a Ca2+ pump function is one cause of exercise‐induced impairment of the relaxation of skeletal muscle, in Brody disease. Phospholamban expressed in cardiac muscle and sarcolipin expressed in skeletal muscle regulate SERCA activity. Studies with knockout and transgenic mice show that gain of inhibitory function of phospholamban alters cardiac contractility and could be a causal feature in some cardiomyopathies. Calsequestrin, calreticulin, and a series of other acidic, lumenal, Ca2+ binding proteins provide a buffer for Ca2+ stored in the sarcoplasmic reticulum. Overexpression of cardiac calsequestrin leads to cardiomyopathy and ablation of calreticulin alters cardiac development.

Bibliography

MacLennan, D. H. (2000). Ca2+ signalling and muscle disease. European Journal of Biochemistry, 267(17), 5291–5297. Portico.

Authors 1
  1. David H. MacLennan (first)
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Dates
Type When
Created 22 years, 5 months ago (March 11, 2003, 12:52 p.m.)
Deposited 1 year, 10 months ago (Oct. 7, 2023, 3:09 a.m.)
Indexed 1 day, 4 hours ago (Aug. 29, 2025, 5:48 a.m.)
Issued 24 years, 11 months ago (Sept. 1, 2000)
Published 24 years, 11 months ago (Sept. 1, 2000)
Published Online 21 years, 10 months ago (Oct. 3, 2003)
Published Print 24 years, 11 months ago (Sept. 1, 2000)
Funders 0

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@article{MacLennan_2000, title={Ca2+ signalling and muscle disease}, volume={267}, ISSN={1432-1033}, url={http://dx.doi.org/10.1046/j.1432-1327.2000.01566.x}, DOI={10.1046/j.1432-1327.2000.01566.x}, number={17}, journal={European Journal of Biochemistry}, publisher={Wiley}, author={MacLennan, David H.}, year={2000}, month=sep, pages={5291–5297} }