Related Experiment Video
Updated: May 16, 2025

Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures
Published on: March 28, 2017
Impact of CYP3A4 functional variability on ziprasidone metabolism
Qi Zhou1,2, Yameng Wu1, Zhize Ye3
1Affiliated Yueqing Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, China.
Introduction:
Ziprasidone is primarily metabolized by CYP3A4, an enzyme with genetic variability and susceptibility to inhibition or induction. This study explored the functional variability of CYP3A4 in ziprasidone metabolism, focusing on drug interactions and genetic polymorphisms.
Methods:
The metabolic inhibition and kinetic properties of ziprasidone were evaluated through in vitro experiments utilizing rat liver microsomes (RLM), human liver microsomes (HLM), and CYP3A4 baculosomes. In vivo validation studies were conducted in Sprague-Dawley rats.
Results:
Quercetin significantly inhibited ziprasidone metabolism in vitro, with in vivo coadministration led to marked increasing in ziprasidone's AUC, CLz/F, and Cmax. Inhibition followed mixed mechanisms in RLM, HLM, and CYP3A4.1 systems. Analysis of CYP3A4 variants revealed distinct metabolic efficiencies: CYP3A4.3, 15, and 33 exhibited elevated clearance, while CYP3A4.24, 31, and 34 showed reduced activity. Quercetin's inhibitory potency varied across alleles, with IC50 values of 17.59 ± 1.01 μM in CYP3A4.1 and 54.51 ± 1.35 μM in CYP3A4.33. Molecular docking identified ARG106, PHE108, PHE215, THR224, and GLU374 as key residues mediating inhibition.
Discussion:
The findings of this study underscore the critical role of quercetin-mediated CYP3A4 inhibition and CYP3A4 genetic polymorphisms in modulating ziprasidone metabolism.
More Related Videos
08:59An Intestine/Liver Microphysiological System for Drug Pharmacokinetic and Toxicological Assessment
Published on: December 3, 2020
10:29Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors
Published on: May 9, 2025
Related Concept Videos
Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance
A study on guinea pigs examined the...
Factors Affecting Drug Biotransformation: Biological
Species differences: Variations in enzyme systems across species can cause disparities in drug metabolism. For instance, humans may metabolize certain drugs faster than rodents, altering therapeutic effects.
Strain differences: Genetic variations within a species can result in differing enzyme activity, impacting drug response and toxicity. For example, some mouse strains may...
Factors Affecting Drug Biotransformation: Physicochemical and Chemical Properties of Drugs
The drug's acidity or basicity is essential in...
Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance
A recent model describes pravastatin's hepatobiliary excretion,...
Nonlinear Pharmacokinetics: Causes of Nonlinearity
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
Nonlinear Pharmacokinetics: Role of Transporters
Polymorphisms occurring in drug transporters can alter...