Abstract
The influence of the neuroleptic trifluoperazine on the intracellular concentration of Ca2+ in macrophages of rats was studied using a Fura-2AM fluorescent Ca2+ probe. It was found that trifluoperazine causes a dose-dependent increase in the intracellular Ca2+ concentration associated with Ca2+ mobilization from intracellular Ca2+ stores and subsequent entry of Ca2+ into peritoneal macrophages of rats. It was also shown that inhibitors of phospholipase A2 (4-bromophenacyl bromide, prednisolone, and dexamethasone), cyclooxygenases (aspirin and indomethacin), and lipoxygenases (caffeic acid, zileuton, and baicalein) suppress Ca2+ responses induced by trifluoperazine in macrophages. The data obtained indicate the participation of enzymes and/or products of the cascade of arachidonic acid metabolism in the influence of trifluoperazine on the intracellular concentration of Ca2+ in peritoneal macrophages.
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