Regulation of Ca(2+)-conducting currents in parathyroid cells by extracellular Ca(2+) and channel blockers.


High extracellular Ca2+ concentrations ([Ca2+]o) produce sustained intracellular Ca2+ responses in parathyroid cells that correlate with suppression of parathyroid hormone release. Using whole cell patch clamping, we identified two types of Ca(2+)-conducting currents in these cells. Type 1 currents were enhanced by raising [Ca2+]o and blocked by Cd2+ and… (More)


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