In Jin Jang
Seoul National University · Medicine
About the Lab
Professor In Jin Jang's research lab specializes in clinical pharmacology and pharmacogenomics, focusing on the impact of genetic polymorphisms on drug disposition and response. The lab investigates transporter- and enzyme-mediated drug interactions, particularly involving OATP1B1 and CYP450 enzymes, to understand interindividual variability in pharmacokinetics and pharmacodynamics. Key research directions include the role of genetic variants in statins, benzodiazepines, and proton pump inhibitors, as well as the clinical implications of drug exposure thresholds, such as vancomycin nephrotoxicity. The lab employs population pharmacokinetic modeling and in vitro-in vivo correlation studies to translate genetic and biochemical findings into personalized medicine applications.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
15OATP 1 B 1 variant haplotypes were found to have a significant effect on the pharmacokinetics of pitavastatin. These results suggest that the *15 allele is associated with decreased pitavastatin uptake from blood into hepatocytes and that OATP 1 B 1 genetic polymorphisms have no effect on the pharmacokinetics of pitavastatin lactone.
Our results suggest that the UGT2B15*2 polymorphism is a major determinant of interindividual variability with respect to the pharmacokinetics and pharmacodynamics of lorazepam.
BACKGROUND: A novel potassium-competitive acid blocker, DWP14012, is in clinical development as a potential alternative to proton pump inhibitors for the treatment of acid-related diseases. AIMS: To evaluate the safety, tolerability, pharmacodynamics and pharmacokinetics of DWP14012 in humans. METHODS: A randomised, double-blind, double-dummy, placebo- and active-controlled, single- and multiple-ascending dose (SAD and MAD, respectively) study was conducted in healthy male subjects without Helic
WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT • Almost all reported studies have investigated the pharmacokinetics of aripiprazole in healthy volunteers. • The pharmacokinetics of dehydroaripiprazole have not been identified in a combined model with aripiprazole. WHAT THIS STUDY ADDS • The data on aripiprazole and dehydroaripiprazole in psychiatric patients were modelled jointly using a population approach. • The apparent clearance of aripiprazole in cytochrome P450 (CYP) 2D6 intermediate metabolizer
We showed that fimasartan raised plasma atorvastatin concentrations. In vitro tests suggested that this effect may have been mediated by fimasartan inhibition of organic anion-transporting polypeptide 1B1.
Vancomycin trough concentrations over 12.1 mg/L were associated with an increased risk of nephrotoxicity. This is lower than the known threshold. Trough vancomycin concentration over the threshold was the only risk factor of nephrotoxicity among demographic factors, dosing regimen, and other clinical conditions in this study. It is suggested that vancomycin trough concentrations greater than 12.1 mg/L require close monitoring for nephrotoxicity.
Korean, Japanese, and Chinese populations are not pharmacogenetically distant from one another, at least with regard to drug disposition, metabolism, and elimination.
Abstract The main objective of this phase I trial was to investigate pharmacokinetics (PKs) of olmutinib in three racial subjects. We also evaluate safety/tolerability and a population PK and pharmacogenomic analysis were performed for explorative purposes. A dose escalation study was conducted in 56 Korean, Japanese and Caucasian subjects. The food effect was assessed in the 300 mg Korean group. Individual PK parameters were calculated by non‐compartmental methods and presented by dose and race
Figure 1. Utilisation of artificial intelligence (AI) in the drug development process. The outcomes and strategies of the various components of the drug development process are described. The applications of AI at each stage of drug development are also shown.[3] (from Drug Discovery Today.
BACKGROUND: -competitive acid blocker, is under clinical development for the treatment of acid-related disorders, such as gastroesophageal reflux disease. AIMS: To determine the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of YH4808, compared to placebo and esomeprazole. METHODS: This double-blind, randomised, placebo- and active comparator (esomeprazole)-controlled study was conducted with 123 healthy male volunteers. We evaluated YH4808 (30-800 mg) properties, adminis
The selected covariates were generally consistent with previous studies. However, the mean volume of distribution was higher than the values reported in other population pharmacokinetic studies, which may have been due to the use of 2 sampling time points. The predictive performance was reasonably acceptable. Therefore, the present model may permit more accurate selection of doses to achieve target theophylline concentrations in premature infants.
Research Areas
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