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- W1551485012 abstract "Objective To investigate the presence of leukotriene D 4 receptors in fura‐2‐loaded human detrusor smooth muscle cells (DSMCs) by examining the ability of leukotriene D 4 to raise intracellular‐free Ca 2+ concentration ([Ca 2+ ] i ), to determine the origin of the leukotriene D 4 ‐mediated rise in [Ca 2+ ] i and to investigate whether the specific leukotriene D 4 receptor antagonist montelukast inhibits the Ca 2+ response induced by leukotriene D 4 . Materials and methods Detrusor muscle biopsies were obtained from patients with benign noninvasive bladder diseases undergoing cystoscopy. DSMCs were isolated using an explant technique and maintained in culture. Only primary cultures or cells passaged up to three times were used for experiments. DSMCs were characterized with immunohistochemical staining and their identity confirmed by transmission electron microscopy. [Ca 2+ ] i was measured in single DSMCs using the Ca 2+ probe fura‐2 and fluorescence‐ratio microscopy. Results Immunohistochemical staining showed that 80–99% of the cells were positive for smooth muscle α‐actin. The ultrastructural features of the cultured cells were those of smooth muscle cells and showed no differentiation in a fibroblastic or myofibroblastic direction. Leukotriene D 4 increased the level of [Ca 2+ ] i in a dose‐dependent manner. Calcium was mobilized almost exclusively from intracellular Ca 2+ stores. There was a dose‐dependent inhibition of the increase in [Ca 2+ ] i by montelukast. Conclusion The present study is the first to show the presence of specific leukotriene D 4 receptors in human detrusor myocytes. This may have implications for a potential pathophysiological role of leukotriene D 4 in patients with interstitial cystitis and other functional or inflammatory bladder disorders." @default.
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- W1551485012 date "2001-05-01" @default.
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- W1551485012 title "The action of cysteinyl-leukotrienes on intracellular calcium mobilization in human detrusor myocytes" @default.
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- W1551485012 doi "https://doi.org/10.1046/j.1464-410x.2001.02135.x" @default.
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