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- W2018084900 abstract "Exposure of cardiac myocytes from adult rat ventricles to the highly selective, high affinity σ receptor ligands 1S,2R-cis-N-[2-(3,4-dichlorophenyl)ethyl]-N-methyl-2-(1-pyrrolidinyl)-cyclohexylamine (BD-737) (0.1–100 nM) and N-[2-(3,4-dichlorophenyl)ethyl]-N,N′,N′-trimethylethylenediamine (BD-1047) (0.01–10 nM), caused potentiation of electrically-evoked amplitudes of contraction and Ca2+ transients, while exposure to 100 nM BD-1047 caused attenuation of these amplitudes. In addition, BD-737 (1–100 nM) and BD-1047 (10–100 nM) caused an increase in the incidence of spontaneous twitches. These effects were inhibited when the incubation with BD-737 was done in the presence of the phospholipase C inhibitor, neomycin, or after pre-incubation with thapsigargin or caffeine which deplete the sarcoplasmic reticulum Ca2+ stores. Inositol 1,4,5-trisphosphate (IP3) production in cardiac myocytes was determined by the IP3 binding protein assay. Both substances caused an increase in the intracellular concentration of IP3. BD-737 caused a rapid transient increase to 3.2-fold in 1 min and stabilization at 2.1-fold of control thereafter. BD-1047 caused a gradual increase reaching 4.4-fold after 5 min. The results suggest that the effects of these σ receptor ligands on contractility and spontaneous contractions are mediated by activation of phospholipase C and elevation of intracellular IP3 level." @default.
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- W2018084900 date "1998-07-01" @default.
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- W2018084900 title "Highly selective σ receptor ligands elevate inositol 1,4,5-trisphosphate production in rat cardiac myocytes" @default.
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- W2018084900 doi "https://doi.org/10.1016/s0014-2999(98)00398-7" @default.
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