Caffeine-stimulated Ca2+ release from the intracellular stores of hepatocytes is not mediated by ryanodine receptors.

Abstract

Caffeine has been much used to examine the possibility that ryanodine receptors similar to those found in skeletal and cardiac muscle may be more widely distributed and perhaps contribute to regenerative Ca2+ signals in electrically inexcitable cells. In permeabilized hepatocytes loaded with 45Ca2+, caffeine (> or = 5 mM) decreased the 45Ca2+ content of the… (More)

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