Calcium-dependent facilitation and graded deactivation of store-operated calcium entry in fetal skeletal muscle

Biophysical Journal
Claude Collet, Jianjie Ma

Abstract

Activation of store-operated Ca(2+) entry (SOCE) into the cytoplasm requires retrograde signaling from the intracellular Ca(2+) release machinery, a process that involves an intimate interaction between protein components on the intracellular and cell surface membranes. The cellular machinery that governs the Ca(2+) movement in muscle cells is developmentally regulated, reflecting maturation of the junctional membrane structure as well as coordinated expression of related Ca(2+) signaling molecules. Here we demonstrate the existence of SOCE in freshly isolated skeletal muscle cells obtained from embryonic days 15 and 16 of the mouse embryo, a critical stage of muscle development. SOCE in the fetal muscle deactivates incrementally with the uptake of Ca(2+) into the sarcoplasmic reticulum (SR). A novel Ca(2+)-dependent facilitation of SOCE is observed in cells transiently exposed to high cytosolic Ca(2+). Our data suggest that cytosolic Ca(2+) can facilitate SOCE whereas SR luminal Ca(2+) can deactivate SOCE in the fetal skeletal muscle. This cooperative mechanism of SOCE regulation by Ca(2+) ions not only enables tight control of SOCE by the SR membrane, but also provides an efficient mechanism of extracellular Ca(2+) entry in r...Continue Reading

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Citations

Jun 26, 2010·Pflügers Archiv : European journal of physiology·Bradley S LaunikonisJoshua N Edwards
Oct 30, 2009·Proceedings of the National Academy of Sciences of the United States of America·Douglas P MillayJeffery D Molkentin
Nov 28, 2012·PloS One·Xiaoli ZhaoNoah Weisleder
Jun 16, 2007·The Journal of Physiology·Bradley S Launikonis, Eduardo Ríos
May 29, 2008·Aging Cell·Xiaoli ZhaoMarco Brotto
Dec 18, 2014·Pflügers Archiv : European journal of physiology·Ernő Zádor, Magdolna Kósa
Apr 25, 2012·Journal of Muscle Research and Cell Motility·J F Olivera, Gonzalo Pizarro
Mar 12, 2020·Frontiers in Cardiovascular Medicine·Hairuo WenLai-Hua Xie

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