Exogenous dopamine induces dehydroepiandrosterone sulfotransferase (rSULT2A1) in rat liver and changes the pharmacokinetic profile of moxifloxacin in rats

Drug Metabolism and Pharmacokinetics
Xue-Yan ShaoTianyan Zhou

Abstract

Dehydroepiandrosterone sulfotransferase (SULT2A1) plays an important role in the detoxification of hydroxyl-containing xenobitotics and in the regulation of the biological activities of hydroxysteroids. Although dopamine (DA) is a vital neurotransmitter, DA also has some special functions in outer peripheral system and takes effect by binding with dopamine receptors including five subtypes (D1-D5). The objective of this study was to investigate the effect of exogenous DA on both the regulation of rSULT2A1 (rat SULT2A1) and the pharmacokinetics of moxifloxacin which is a specific substrate of rSULT2A1. After different doses of DA (0, 2, 10 and 100 mg/kg/d) were administrated to both male and female rats for 7 days, the activity, protein level and mRNA expression of rSULT2A1 increased significantly. Moreover, both Cmax and AUC of moxifloxacin decreased and AUC of moxifloxacin sulfate conjugate metabolite increased significantly when moxifloxacin was administered to rats with DA pretreatment. Additionally, D1 expression in liver and cAMP concentration also increased after the treatment with DA. Overall these results suggest that exogenous DA may induce rSULT2A1 in rat liver and may further change the pharmacokinetic characteristic...Continue Reading

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Citations

Mar 14, 2019·Journal of Basic and Clinical Physiology and Pharmacology·Rajiv BalyanGuangping Chen

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