Related Experiment Video
Updated: Jan 29, 2026
Methods for Studying the Mechanisms of Action of Antipsychotic Drugs in Caenorhabditis elegans
Published on: February 4, 2014
Comparison of In Vitro Metrics With Real-World Risk of Drug-Induced Parkinsonism Due to Antipsychotic Drugs:
Woo-Taek Lim1, Hyun Woo Lee2,3, Seungyeon Kim4
1College of Pharmacy, Gachon University, 191, Hambangmoe-ro, Yeonsu-gu, Incheon, 21936, Republic of Korea, +82-32-820-4937.
Background:
Drug-induced parkinsonism (DIP) predominantly occurs due to antipsychotic drugs (APDs) blocking dopamine D2 receptors (D2Rs). However, in vitro assays often fail to fully reflect real-world variability in clinical outcomes.
Objective:
This study aimed to evaluate whether in vitro pharmacological metrics correspond to real-world risk of DIP associated with APD use.
Methods:
For 8 commonly used APDs, key in vitro parameters-including inhibition constants (Ki) of D2Rs and the serotonin 2A receptor, reversal rate (Kr) of D2Rs, and blood-brain barrier (BBB) penetration rate-were compiled to construct 6 composite DIP risk metrics. The real-world DIP risk was assessed using the Seoul National University Hospital common data model (2002-2021). APD users were matched 1:1 to selective serotonin reuptake inhibitor users using propensity score matching, and Cox proportional hazard regression was performed to estimate the hazard ratios (HRs) for DIP risk. Correlation between each in vitro metric and real-world DIP risk was evaluated using logarithmic regression models.
Results:
Among 44,664 patients from 8 matched cohorts, haloperidol showed the highest DIP risk (HR=4.56, 95% CI 2.29-9.07), whereas aripiprazole exhibited the lowest risk (HR=2.11, 95% CI 1.56-2.86). Metric 4 (pKr × BBB penetration rate) exhibited the strongest correlation with real-world DIP risk (R2=0.95). The correlation decreased when aripiprazole, a partial D2R agonist, was included in the analysis (R2=0.58).
Conclusions:
Integrating receptor-binding kinetics with BBB penetration may provide an in vitro framework that reflects real-world variation in DIP risk among D2R-antagonizing APDs. These findings support the relevance of combining kinetic and central nervous system exposure parameters for early safety evaluation.
More Related Videos
11:06Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
Published on: January 31, 2022
07:02A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development
Published on: February 11, 2019
Related Concept Videos
01:28Psychosis and Antipsychotic Drugs: Overview
01:21Antipsychotic Drugs: Therapeutic Uses and Side Effects
Despite these side effects, antipsychotics are used therapeutically for various purposes, including managing schizophrenia, preventing nausea and vomiting, curbing...
01:21Antipsychotic Drugs: Typical and Atypical Agents
01:16Methods for Studying Drug Absorption: In vitro
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
01:14Drug Dissolution: Requirements and Profile Comparison
01:08Renal Drug Clearance: Comparison Between Renal Excretion Methods
Renal clearance is often associated with the renal glomerular filtration rate (GFR), which represents the rate at which plasma is filtered through the glomeruli in the kidney. When drug reabsorption is minimal and there is no active secretion, renal clearance is closely related to the...