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Jo Yong-gyun

Sungkyunkwan University · Medicine

About the Lab

Professor Jo Yong-gyun's research lab specializes in hepatology and metabolic liver diseases, with a primary focus on nonalcoholic fatty liver disease (NAFLD), its progression to fibrosis, and its links to metabolic syndrome, insulin resistance, and related conditions such as colorectal adenomas and diabetes. The lab conducts large-scale cohort studies to explore the impact of lifestyle factors—like modest alcohol consumption—on liver disease outcomes, particularly in low-risk and young populations. They also investigate the role of hepatic steatosis in early fibrosis progression among patients with chronic hepatitis B and the predictive value of metabolic markers in preclinical diabetes. Their work bridges clinical hepatology with metabolic and epidemiological research.

NAFLDmetabolic syndromeliver fibrosisinsulin resistancehepatic steatosis

Research Overview

Papers
329
Total Citations
8,442
Papers (5y)
25
Primary Field
Medicine

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
25total
2022
2023
2024
2025
2026
Citations per year (5y)
148total
20222023202420252026

Selected Papers

15
1
Article|162 citations·2018
Nonheavy Drinking and Worsening of Noninvasive Fibrosis Markers in Nonalcoholic Fatty Liver Disease: A Cohort Study
Yoosoo Chang, Yong Kyun Cho, Yejin Kim, Eunju Sung, Jiin Ahn, Hyun Suk Jung, Kyung Eun Yun, Ho Cheol Shin, Seungho Ryu
SJR Q1Hepatology

The effect of modest alcohol consumption on fibrosis progression in the general population with nonalcoholic fatty liver disease (NAFLD) remains unclear. We examined the association of nonheavy alcohol consumption with worsening of noninvasive fibrosis indices in a large-scale, low-risk population with NAFLD. A cohort study was performed in 58,927 Korean adults with NAFLD and low fibrosis scores who were followed for a median of 4.9 years. Non-, light, and moderate drinkers were defined as 0 g/d

EpidemiologyMedicine
2
Article|151 citations·2010
Relationship of non‐alcoholic fatty liver disease to colorectal adenomatous polyps
Sang Tai Hwang, Yong Kyun Cho, Jung Ho Park, Hong Joo Kim, Dong Il Park, Chong Il Sohn, Woo Kyu Jeon, Byung Ik Kim, Kyoung Hee Won, Wook Jin
SJR Q1Journal of Gastroenterology and HepatologyOA

BACKGROUND AND AIMS: Metabolic syndrome and insulin resistance are associated with a higher risk of colon cancer. Non-alcoholic fatty liver disease (NAFLD) is regarded as a manifestation of metabolic syndrome in the liver. This investigation was initiated to determine whether NAFLD has a relationship to colorectal adenomatous polyps. METHODS: We examined the 2917 participants who underwent a routine colonoscopy at Kangbuk Samsung Hospital in 2007. We divided the 2917 subjects into the adenomatou

EpidemiologyMedicine
3
Article|123 citations·2010
Impact of Nonalcoholic Fatty Liver Disease on Insulin Resistance in Relation to HbA1c Levels in Nondiabetic Subjects
Ji Cheol Bae, Yong Kyun Cho, Won‐Young Lee, Hyun Il Seo, Eun‐Jung Rhee, Se Eun Park, Cheol‐Young Park, Ki Won Oh, Ki‐Chul Sung, Byung Ik Kim
SJR Q1The American Journal of Gastroenterology

NAFLD had an association with HbA1c level and insulin resistance in nondiabetic individuals, and these associations were independent of obesity and other metabolic components.

EpidemiologyMedicine
4
Article|74 citations·2019
Alcoholic and Nonalcoholic Fatty Liver Disease and Liver-Related Mortality: A Cohort Study
Yoosoo Chang, Yong Kyun Cho, Juhee Cho, Hyun Suk Jung, Kyung Eun Yun, Jiin Ahn, Chong Il Sohn, Ho Cheol Shin, Seungho Ryu
SJR Q1The American Journal of Gastroenterology

OBJECTIVES: We compared liver-related mortality by fibrosis severity between 2 types of fatty liver disease (FLD), nonalcoholic FLD (NAFLD) and alcoholic FLD (AFLD), in a large cohort of nonobese and obese individuals. METHODS: A cohort study was performed with 437,828 Korean adults who were followed up for up to 14 years. Steatosis was diagnosed based on ultrasonography; fibrosis severity was determined by the fibrosis 4 (FIB-4) score. Vital status and liver-related deaths were ascertained thro

EpidemiologyMedicine
5
Article|62 citations·2009
Hepatic steatosis and fibrosis in young men with treatment‐naïve chronic hepatitis B
Jung Won Yun, Yong Kyun Cho, Jung Ho Park, Hong Joo Kim, Dong Il Park, Chong Il Sohn, Woo Kyu Jeon, Byung Ik Kim, Byung Ho Son, Jun Ho Shin
SJR Q1Liver International

OBJECTIVES: The clinical significance of liver steatosis has been studied because steatosis plays a role in the progression of liver fibrosis. Nevertheless, the impact of steatosis in the early stage of fibrosis in non-obese young men with chronic hepatitis B (CHB) is poorly understood. Thus, the purpose of this study was to investigate the prevalence of hepatic steatosis, assess the relationship between hepatic steatosis and fibrosis and to assess the laboratory parameters for predicting clinic

EpidemiologyMedicine
6
Article|49 citations·2009
Abnormal glucose tolerance in young male patients with nonalcoholic fatty liver disease
Jung Won Yun, Yong Kyun Cho, Jung Ho Park, Hong Joo Kim, Dong Il Park, Chong Il Sohn, Woo Kyu Jeon, Byung Ik Kim
SJR Q1Liver InternationalOA

OBJECTIVE: The association of nonalcoholic fatty liver disease (NAFLD) with insulin resistance and metabolic syndrome has been documented for obese men and middle-aged men. This study was designed to determine the relationship between NAFLD and the oral glucose tolerance test (OGTT) to predict preclinical diabetes in nondiabetic young male patients (<30 years old). METHODS: A total of 75 male patients who had elevated liver enzymes and who were diagnosed with NAFLD were enrolled in this study. A

EpidemiologyMedicine
7
Article|36 citations·2011
DNA methylation-dependent regulation of TrkA, TrkB, and TrkC genes in human hepatocellular carcinoma
Wook Jin, Jongjoo Lee, Min Soo Kim, Byung Ho Son, Yong Kyun Cho, Hyoung‐Pyo Kim
SJR Q2Biochemical and Biophysical Research CommunicationsOA
Molecular BiologyBiochemistry, Genetics and Molecular Biology
8
Article|32 citations·2017
Lifestyle predictors of obese and non-obese patients with nonalcoholic fatty liver disease: A cross-sectional study
Joo Hee Kwak, Dae Won Jun, Seung Min Lee, Yong Kyun Cho, Kang Nyeong Lee, Hang Lak Lee, Oh Young Lee, Ho Soon Choi, Byung Chul Yoon
SJR Q1Clinical Nutrition
EpidemiologyMedicine
9
Article|31 citations·2021
Relationship between gut microbiome diversity and hepatitis B viral load in patients with chronic hepatitis B
Eun‐Jeong Joo, Hae Suk Cheong, Min‐Jung Kwon, Won Sohn, Han‐Na Kim, Yong Kyun Cho
SJR Q1Gut PathogensOA

BACKGROUND: Hepatitis B virus (HBV) infection is associated with a reduced risk of developing dyslipidemia and non-alcoholic fatty liver diseases. Given that the gut microbiota plays a significant role in cholesterol metabolism, we compared the differences in gut microbial diversity and composition between HBV-infected and uninfected subjects. RESULTS: A prospective case-control study was designed comprising healthy controls (group A) and HBV-infected individuals (group B) in a 1:1 ratio (57 par

Molecular BiologyBiochemistry, Genetics and Molecular Biology
10
Article|25 citations·2015
Vitamin D deficiency in non-alcoholic fatty liver disease: The chicken or the egg?
Seung Min Lee, Dae Won Jun, Yong Kyun Cho, Ki Seol Jang
SJR Q1Clinical Nutrition
Pathology and Forensic MedicineMedicine
11
Article|21 citations·2009
Deleterious effects of silymarin on the expression of genes controlling endothelial nitric oxide synthase activity in carbon tetrachloride-treated rat livers
Yong Kyun Cho, Jung Won Yun, Jung Ho Park, Hong Joo Kim, Dong Il Park, Chong Il Sohn, Woo Kyu Jeon, Byung Ik Kim, Wook Jin, Yong‐Hyun Kwon, Mi‐Kyung Shin, Tae Moo Yoo
SJR Q1Life Sciences
Pulmonary and Respiratory MedicineMedicine
12
Article|13 citations·2011
Which metabolic syndrome criteria best predict the presence of non-alcoholic fatty liver disease?
Hyun Il Seo, Yong Kyun Cho, Won‐Young Lee, Eun‐Jung Rhee, Ki‐Chul Sung, Bum Soo Kim, Byung Ho Son, Jun Ho Shin, Kwan Joong Joo, Hyun Pyo Hong, Seoung Wan Chae, Wook Jin
SJR Q1Diabetes Research and Clinical Practice
EpidemiologyMedicine
13
Article|10 citations·2019
Prolonged fever is not a reason to change antibiotics among patients with uncomplicated community-acquired acute pyelonephritis
Young Rock Jang, Joong Sik Eom, Wookyung Chung, Yong Kyun Cho
SJR Q3MedicineOA

The study aimed to determine the pattern of fever resolution among febrile patients undergoing treatment for acute pyelonephritis (APN) and prove that switching therapy based solely on persistent fever beyond 72 hours of antibiotics treatment may be unwarranted.For the purpose of this study, non-responders were defined as those patients who had a persistent fever over 72 hours after the initiation of antibiotic therapy. Responders were defined as those patients who became afebrile in less than 7

EpidemiologyMedicine
14
Article|10 citations·2021
Liver fibrosis scores and risk of liver‐related mortality in young adults with chronic hepatitis B: A cohort study
Won Sohn, Yoosoo Chang, Yong Kyun Cho, Yun Soo Hong, Ho Cheol Shin, Seungho Ryu
SJR Q2Journal of Viral Hepatitis

Abstract The predictive role of noninvasive liver fibrosis scores on liver‐related mortality in patients with chronic hepatitis B below 40 years of age remains unclarified. We examined the association of liver fibrosis scores with liver‐related mortality in young (&lt;40 years) and older adults with hepatitis B virus (HBV) infection. A cohort study was performed in 21,360 HBsAg‐positive Korean adults without liver cirrhosis or liver cancer at baseline who were followed up for up to 18 years. The

EpidemiologyMedicine
15
Article|9 citations·2008
Significance of palliative gastrojejunostomy for unresectable pancreatic head carcinoma.
Yong Kyun Cho, Jun Ho Shin, Se Yong Oh
PubMed

BACKGROUND/AIMS: When diagnosed, most patients with pancreatic head cancer are defined as having an unresectable tumor, and thus appropriate relief of main symptoms, such as, obstructive jaundice, duodenal obstruction, and pain, is the major concern. However, debate continues concerning the efficacy of gastrojejunostomy at preventing duodenal obstruction. In this study, we evaluated the effects of palliative gastrojejunostomy on the quality of life of patients with unresectable pancreatic head c

SurgeryMedicine

Research Areas

EpidemiologyHepatologyOncologySurgeryPulmonary and Respiratory MedicineGastroenterology

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