Thapsigargin inhibits contraction and Ca2+ transient in cardiac cells by specific inhibition of the sarcoplasmic reticulum Ca2+ pump.


Regulation of the level of ionized calcium, [Ca2+]i, is critical for its use as an important intracellular signal. In cardiac and skeletal muscle the control of fluctuations of [Ca2+]i depend on sarcolemmal and sarcoplasmic reticulum ion channels and transporters. We have investigated the sesquiterpine lactone, thapsigargin (TG), because of its reported… (More)


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