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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.

pharmacogenomicsdrug transporterspharmacokineticspersonalized medicinedrug interactions

Research Overview

Papers
441
Total Citations
7,799
Papers (5y)
67
Primary Field
Medicine

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
67total
2021
2022
2023
2024
2025
Citations per year (5y)
551total
20212022202320242025

Selected Papers

15
1
Article|169 citations·2005
Effect of () variant alleles on the pharmacokinetics of pitavastatin in healthy volunteers
Jae‐Yong Chung, Joo‐Youn Cho, K YU, Jin‐Tae Kim, Dal‐Seok Oh, Heechul Jung, Kyoung Soo Lim, Ki Won Moon, Su‐Jung Shin, In‐Jin Jang
SJR Q1Clinical Pharmacology & Therapeutics

OATP 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.

OncologyMedicine
2
Article|104 citations·2005
Effect of the genotype on the pharmacokinetics, pharmacodynamics, and drug interactions of intravenous lorazepam in healthy volunteers
Jae‐Yong Chung, Joo‐Youn Cho, K YU, Jae‐Weon Kim, Hae‐Yun Jung, Kyoung Soo Lim, In‐Jin Jang, Sujin Shin
SJR Q1Clinical Pharmacology & Therapeutics

Our results suggest that the UGT2B15*2 polymorphism is a major determinant of interindividual variability with respect to the pharmacokinetics and pharmacodynamics of lorazepam.

Pediatrics, Perinatology and Child HealthMedicine
3
Article|68 citations·2018
Safety, tolerability, pharmacodynamics and pharmacokinetics of DWP14012, a novel potassium‐competitive acid blocker, in healthy male subjects
Jung Sunwoo, Jaeseong Oh, Seol Ju Moon, Sang Chun Ji, S. H. Lee, Kyung‐Sang Yu, H. S. Kim, A. Lee, In‐Jin Jang
SJR Q1Alimentary Pharmacology & TherapeuticsOA

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

GastroenterologyMedicine
4
Article|52 citations·2008
Population pharmacokinetic modelling of aripiprazole and its active metabolite, dehydroaripiprazole, in psychiatric patients
Jung‐Ryul Kim, Hyo‐Bum Seo, Joo‐Youn Cho, Do‐Hyung Kang, Yong Ku Kim, Won‐Myong Bahk, Kyung‐Sang Yu, Sang‐Goo Shin, Jun Soo Kwon, In‐Jin Jang
SJR Q1British Journal of Clinical PharmacologyOA

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

PharmacologyPharmacology, Toxicology and Pharmaceutics
5
Article|44 citations·2003
Effect of the CYP2D6 genotype on the pharmacokinetics of tropisetron in healthy Korean subjects
Myo‐Kyoung Kim, Joo‐Youn Cho, Hyeong-Seok Lim, Kyoung-Seop Hong, Jae‐Yong Chung, Kyun‐Seop Bae, Dal‐Seok Oh, Sang‐Goo Shin, Sang‐Hun Lee, Dong‐Ho Lee, Bumchan Min, In‐Jin Jang
SJR Q2European Journal of Clinical Pharmacology
SurgeryMedicine
6
Article|42 citations·2008
Pharmacokinetics, pharmacodynamics, and tolerability of the dipeptidyl peptidase IV inhibitor LC15-0444 in healthy Korean men: A dose—block-randomized, double-blind, placebo-controlled, ascending single-dose, phase I study
Kyoung Soo Lim, Jung‐Ryul Kim, Yun‐Jung Choi, Kwang‐Hee Shin, Kyu‐pyo Kim, Jang Hee Hong, Joo‐Youn Cho, Hyunsuk Shin, Kyung‐Sang Yu, Sang‐Goo Shin, Obin Kwon, Dal-Mi Hwang
SJR Q1Clinical Therapeutics
Endocrinology, Diabetes and MetabolismMedicine
7
Article|40 citations·2021
Changes in the gut microbiome influence the hypoglycemic effect of metformin through the altered metabolism of branched-chain and nonessential amino acids
Yujin Lee, Andrew HyoungJin Kim, Eunwoo Kim, SeungHwan Lee, Kyung‐Sang Yu, In‐Jin Jang, Jae‐Yong Chung, Joo‐Youn Cho
SJR Q1Diabetes Research and Clinical PracticeOA
PhysiologyMedicine
8
Article|33 citations·2011
The Effect of the Newly Developed Angiotensin Receptor II Antagonist Fimasartan on the Pharmacokinetics of Atorvastatin in Relation to OATP1B1 in Healthy Male Volunteers
Kwang-Hee Shin, Tae‐Eun Kim, Sung Eun Kim, Min Goo Lee, Im‐Sook Song, Seo Hyun Yoon, Joo‐Youn Cho, In‐Jin Jang, Sang-Goo Shin, Kyung‐Sang Yu
SJR Q2Journal of Cardiovascular PharmacologyOA

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.

OncologyMedicine
9
Article|30 citations·1999
Human immune response to a Pseudomonas aeruginosa outer membrane protein vaccine
In‐Jin Jang, Ik-Sang Kim, Wan Je Park, Kyung-Sang Yoo, Dong‐Seok Yim, Hyung-Ki Kim, Sang‐Goo Shin, Woo Hyun Chang, Na-Gyong Lee, Sang Bo Jung, Dong Ho Ahn, Yang Je Cho
SJR Q1Vaccine
MicrobiologyImmunology and Microbiology
10
Article|22 citations·2014
Trough Concentration Over 12.1 mg/L is a Major Risk Factor of Vancomycin-Related Nephrotoxicity in Patients With Therapeutic Drug Monitoring
Hye Kyung Han, Hyungmi An, Kwang-Hee Shin, Donghoon Shin, Sue Hyun Lee, Ju Han Kim, Sang‐Heon Cho, Hye‐Ryun Kang, In‐Jin Jang, Kyung‐Sang Yu, Kyoung Soo Lim
SJR Q2Therapeutic Drug Monitoring

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.

Infectious DiseasesMedicine
11
Article|20 citations·2014
Korean, Japanese, and Chinese populations featured similar genes encoding drug-metabolizing enzymes and transporters
SoJeong Yi, Hyungmi An, Howard Lee, Sangin Lee, Ichiro Ieiri, Youngjo Lee, Joo‐Youn Cho, Takeshi Hirota, Masato Fukae, Kenji Yoshida, Shin‐ichiro Nagatsuka, Miyuki Kimura
SJR Q2Pharmacogenetics and Genomics

Korean, Japanese, and Chinese populations are not pharmacogenetically distant from one another, at least with regard to drug disposition, metabolism, and elimination.

PharmacologyPharmacology, Toxicology and Pharmaceutics
12
Article|14 citations·2019
A safety, pharmacokinetic, pharmacogenomic and population pharmacokinetic analysis of the third‐generation EGFR TKI, olmutinib (HM61713), after single oral administration in healthy volunteers
Young Su Noh, Seonghae Yoon, Suk Ran Kim, Kyung‐Tae Lee, In‐Jin Jang
SJR Q2Basic & Clinical Pharmacology & ToxicologyOA

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

Pulmonary and Respiratory MedicineMedicine
13
Article|14 citations·2019
Artificial intelligence in drug development: clinical pharmacologist perspective
In‐Jin Jang
SJR Q3Translational and Clinical PharmacologyOA

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.

Health InformaticsMedicine
14
Article|14 citations·2017
A novel K+ competitive acid blocker, YH4808, sustains inhibition of gastric acid secretion with a faster onset than esomeprazole: randomised clinical study in healthy volunteers
SoJeong Yi, H. Lee, Seong Bok Jang, Hae Mi Byun, Seo Hyun Yoon, Joo‐Youn Cho, In‐Jin Jang, Kyung‐Sang Yu
SJR Q1Alimentary Pharmacology & TherapeuticsOA

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

GastroenterologyMedicine
15
Article|11 citations·2013
Population Pharmacokinetics of Theophylline in Premature Korean Infants
Sung Eun Kim, Bo‐Hyung Kim, SeungHwan Lee, Jin A Sohn, Han‐Suk Kim, Joo‐Youn Cho, Seo Hyun Yoon, In‐Jin Jang, Kyung‐Sang Yu, Kyoung Soo Lim
SJR Q2Therapeutic Drug Monitoring

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.

Pediatrics, Perinatology and Child HealthMedicine

Research Areas

PharmacologyEndocrinology, Diabetes and MetabolismPsychiatry and Mental healthCardiology and Cardiovascular MedicineMolecular BiologyOncology

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