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• W1990128461 abstract "The objectives of this study were to characterize the pharmacokinetics of sertindole and its active metabolite dehydrosertindole in rats and to evaluate the central modulatory and behavioural pharmacodynamics including a competitive interaction model between the compounds. Following oral administration of sertindole or dehydrosertindole, the plasma concentration-time courses were determined in conjunction with striatal dopamine D(2) receptor binding. In addition, the behavioural effects were recorded in the conditioned avoidance response (CAR) paradigm. A one-compartment model with Michaelis-Menten elimination best described the pharmacokinetics of sertindole. Formation of dehydrosertindole was incorporated into the pharmacokinetic model and exhibited first-order elimination. PK/PD modelling after administration of dehydrosertindole resulted in potency estimates of 165 and 424 ng/ml for D(2)-occupancy (Kd) and CAR measurements (EC(50)), respectively. The pharmacokinetics of the parent-metabolite system was integrated into a competitive pharmacodynamic E(max) model in order to quantitate the potency of sertindole with the pharmacodynamic parameters of the metabolite taken into account. Based on this approach, effect compartment concentrations of sertindole needed to attain 50% occupancy and half-maximal effect in the CAR paradigm were 133 and 338 ng/ml, respectively. The corresponding potency-estimates obtained after conventional modelling of the sertindole data without accounting for the metabolite amounted to 102 and 345 ng/ml. Based on competitive PK/PD analysis of the parent-metabolite interaction, the relative contribution of dehydrosertindole to the overall pharmacological effect after sertindole administration in rats appeared to be of minor significance. This could mainly be ascribed to the relatively low extent of bioconversion of sertindole into dehydrosertindole in this species." @default.
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• W1990128461 date "2009-05-01" @default.
• W1990128461 modified "2023-10-10" @default.
• W1990128461 title "Pharmacokinetics of sertindole and its metabolite dehydrosertindole in rats and characterization of their comparative pharmacodynamics based on<i>in vivo</i>D₂receptor occupancy and behavioural conditioned avoidance response" @default.
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• W1990128461 doi "https://doi.org/10.1002/bdd.656" @default.
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