Endocrinology and Metabolism

Original Articles

Fatty Liver Index Dynamics as a Predictor of Hepatocellular Carcinoma in Patients with Type 2 Diabetes Mellitus and Non-Cirrhotic Livers: Eun-Hee Cho, Min Gu Kang, Chang Hun Lee, Shinyoung Oh, Chen Shen, Ha Ram Oh, Young Ran Park, Hyun Lee, Jong Seung Kim, Ji Hyun Park; Received December 15, 2024 Accepted March 13, 2025 Published online May 29, 2025; DOI: https://doi.org/10.3803/EnM.2024.2286 [Epub ahead of print]

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Abstract PDF Supplementary Material PubReader ePub: Background
Type 2 diabetes mellitus (T2DM) is a significant risk factor for hepatocellular carcinoma (HCC) in patients with nonalcoholic fatty liver disease; however, surveillance strategies for patients with T2DM, especially without cirrhosis, are inadequate. This study examined whether the fatty liver index (FLI) and its dynamic changes can effectively identify patients with T2DM at increased risk for HCC.
Methods
Data from 92,761 individuals with T2DM aged 40 to 79 who underwent two health screenings (2012 to 2015) were analyzed. The FLI, calculated using waist circumference, body mass index, triglycerides, and gamma-glutamyl transferase, was used to stratify patients by baseline FLI and FLI changes between screenings. HCC cases were identified via International Classification of Diseases codes and reimbursement records (2016 to 2020).
Results
Patients with baseline FLI of 30 to 59.9 had a 1.90-fold higher risk (P<0.01) and those with FLI ≥60 had a 2.94-fold higher risk (P<0.01) of developing HCC compared to those with FLI <30. An increase in FLI from <30 to ≥30 resulted in a 2.10-fold higher risk of HCC (P<0.01), while a reduction in FLI from ≥30 to <30 led to a 0.64-fold lower risk (P=0.03). Protective benefits of FLI reduction took approximately 3 years to manifest.
Conclusion
Baseline and dynamic monitoring of FLI effectively identified HCC risk in T2DM patients with non-cirrhotic livers, supporting early detection and intervention.

Sodium-Glucose Cotransporter-2 Inhibitor Enhances Hepatic Gluconeogenesis and Reduces Lipid Accumulation via AMPK-SIRT1 Activation and Autophagy Induction: Si Woo Lee, Hyunki Park, Minyoung Lee, Hyangkyu Lee, Eun Seok Kang; Received October 25, 2024 Accepted February 12, 2025 Published online May 12, 2025; DOI: https://doi.org/10.3803/EnM.2024.2223 [Epub ahead of print]

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Sodium-glucose cotransporter type 2 (SGLT2) inhibitors, such as dapagliflozin, are primarily used to lower glucose in type 2 diabetes. Recent studies suggest broader metabolic effects, particularly in the liver. This study explores the molecular mechanisms by which dapagliflozin influences hepatic glucose and lipid metabolism, hypothesizing that it activates the 5’-adenosine monophosphate-activated protein kinase (AMPK)-sirtuin 1 (Sirt1) pathway to promote gluconeogenesis and reduce lipid accumulation via autophagy.
Methods
HepG2 hepatocellular carcinoma cells were treated with dapagliflozin, and Western blotting, quantitative reverse transcription polymerase chain reaction, and fluorescence microscopy were used to assess gluconeogenic enzyme expression and autophagy. In vivo, mice with liver-specific autophagy related 7 (Atg7) deletion and those on a high-fat diet were used to evaluate glucose regulation, lipid metabolism, and autophagy.
Results
Dapagliflozin significantly increased expression of gluconeogenic enzymes like phosphoenolpyruvate carboxykinase (PEPCK) in HepG2 cells and enhanced autophagic flux, evidenced by increased light chain 3B (LC3B)-II levels and autophagosome formation. AMPK-Sirt1 activation was confirmed as the underlying mechanism. Additionally, dapagliflozin reduced fatty acid synthesis by suppressing enzymes such as acetyl-CoA carboxylase and fatty acid synthase, while promoting fatty acid degradation via carnitine palmitoyltransferase 1α (CPT1α) upregulation. In high-fat diet mice, dapagliflozin increased hepatic gluconeogenesis and reduced lipid accumulation, though serum cholesterol and triglyceride levels were unaffected.
Conclusion
Dapagliflozin enhances hepatic gluconeogenesis and reduces steatosis by activating the AMPK-Sirt1 pathway and promoting autophagy. These findings suggest that SGLT2 inhibitors could offer therapeutic benefits for managing hepatic lipid disorders, beyond glycemic control.

Brief Reports

Characteristics of Metabolic Dysfunction-Associated Steatotic Liver Disease and Its Risk for Hepatic Fibrosis in 476,124 Korean Adults: A Cross-Sectional Study: Da Yeon Lee, Ji-Hee Ko, Han-Na Jang, Sun Joon Moon, Hye-Mi Kwon, Se Eun Park, Cheol-Young Park, Won-Young Lee, Ki-Won Oh, Eun-Jung Rhee; Received December 16, 2024 Accepted February 3, 2025 Published online March 27, 2025; DOI: https://doi.org/10.3803/EnM.2024.2281 [Epub ahead of print]

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Abstract PDF Supplementary Material PubReader ePub: As the new terminology of metabolic dysfunction-associated steatotic liver disease (MASLD) and MASLD with increased alcohol intake (MetALD) has emerged, the clinical significance of MASLD is increasing. This cross-sectional study analyzed 476,124 health checkup participants (2002–2022) to compare hepatic fibrosis risks across MASLD, MetALD, non-alcoholic fatty liver disease (NAFLD), and metabolic dysfunction-associated fatty liver disease (MAFLD). Steatotic liver was identified via ultrasonography, and fibrosis risk was assessed using aspartate aminotransferase to platelet ratio index and NAFLD fibrosis score. The prevalence of NAFLD, MAFLD, MASLD, and MetALD was 30.1%, 32.3%, 29.8%, and 3.0%, respectively, with a 27.9% overlap among three conditions. Participants with steatotic liver were predominantly male, with higher glucose, lipids, liver enzymes, and homeostasis model assessment of insulin resistance levels. Three disease definitions largely overlapped, with MASLD and NAFLD being very similar, while participants with MAFLD and MetALD showed increased fibrosis risk (clinical trial registration number: 2024-11-050).

Diabetes, obesity and metabolism
Association of Steatotic Liver Disease with Retinal Vascular Occlusion: The Influence of Obesity in a Large Health Screening Cohort: Younjin Oh, Su Jeong Song; Endocrinol Metab. 2025;40(2):299-303. Published online February 12, 2025; DOI: https://doi.org/10.3803/EnM.2024.2181

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Abstract PDF Supplementary Material PubReader ePub: In this cross-sectional study, we aimed to investigate the relationship between steatotic liver disease (SLD) and retinal abnormalities in a cohort undergoing health screening. Our study included 353,607 participants who underwent fundus photography and abdominal ultrasonography at least once at the Kangbuk Samsung Health Promotion Center from 2002 to 2022. After adjusting for age and sex, the risk of retinal vein occlusion (RVO) significantly increased with the presence of non-alcoholic fatty liver disease, metabolic dysfunction-associated fatty liver disease, and metabolic dysfunction-associated SLD, with odds ratios of 1.259 (95% confidence interval [CI], 1.050 to 1.510), 1.498 (95% CI, 1.249 to 1.796), and 1.342 (95% CI, 1.121 to 1.605), respectively. However, these associations weakened after adjusting for body mass index. No statistically significant associations were observed with other retinal disorders after adjusting for age, sex, and other confounding factors. Our findings suggest that obesity may mediate the relationship between SLD and RVO, while other retinal abnormalities may be more closely associated with known risk factors rather than SLD itself.

Original Articles

Thyroid
Triiodothyronine Is Associated with Incidence/Resolution of Steatotic Liver Disease: Longitudinal Study in Euthyroid Korean: Hye In Kim, Jun Young Kim, Jung Hwan Cho, Ji Min Han, Sunghwan Suh, Ji Cheol Bae, Tae Hyuk Kim, Sun Wook Kim, Jong Ryeal Hahm, Jae Hoon Chung; Endocrinol Metab. 2025;40(1):135-145. Published online December 4, 2024; DOI: https://doi.org/10.3803/EnM.2024.2040

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Abstract PDF Supplementary Material PubReader ePub: Background
The positive relationship between triiodothyronine (T3) and steatotic liver disease (SLD) demonstrated only in crosssectional study. We aimed to evaluated whether total T3 (TT3) is associated with the development/resolution of SLD in longitudinal design.
Methods
This retrospective, longitudinal, population-based cohort study included 1,665 South Korean euthyroid adults with ≥4 thyroid function test. We explored the impact of mean TT3 during follow-up on development/resolution of either SLD (diagnosed by ultrasound) or modified metabolic dysfunction-associated steatotic liver disease (MASLD) using Cox proportional hazards regression models.
Results
During about median 5 years follow-up, 807/1,216 (66.3%) participants among participants without SLD at baseline developed SLD, and 253/318 (79.5%) participants among participants with SLD at baseline SLD resolved fatty liver. Mean TT3 rather than thyroid stimulating hormone or mean free thyroxine was significantly related with development (adjusted hazard ratio [HR], 1.01; 95% confidence interval [CI], 1.00 to 1.02; P=0.002) and resolution (adjusted HR, 0.97; 95% CI, 0.96 to 0.99; P=0.005) of SLD. Compared with low mean TT3 group, high mean TT3 group was positively associated with development of SLD (adjusted HR, 1.20; 95% CI, 1.05 to 1.38; P=0.008) and inversely associated with resolution of SLD (adjusted HR, 0.66; 95% CI, 0.51 to 0.85; P=0.001). The statistical significance remained for development (adjusted HR, 1.29; 95% CI, 1.10 to 1.51; P=0.001) and resolution (adjusted HR, 0.71; 95% CI, 0.54 to 0.94; P=0.018) of modified MASLD.
Conclusion
In Korean euthyroid adults, TT3 level was associated with development and resolution of either SLD or modified MASLD.

Diabetes, obesity and metabolism
Protective Effects of Melatonin in High-Fat Diet-Induced Hepatic Steatosis via Decreased Intestinal Lipid Absorption and Hepatic Cholesterol Synthesis: Hyungjune Ku, Yeonji Kim, Alvin Lyle Kim, Garam Lee, Youngsik Choi, Bukyung Kim; Endocrinol Metab. 2023;38(5):557-567. Published online September 1, 2023; DOI: https://doi.org/10.3803/EnM.2023.1672

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Background
The preventative effect of melatonin on the development of obesity and the progression of fatty liver under a high-fat diet (HFD) has been well elucidated through previous studies. We investigated the mechanism behind this effect regarding cholesterol biosynthesis and regulation of cholesterol levels.
Methods
Mice were divided into three groups: normal chow diet (NCD); HFD; and HFD and melatonin administration group (HFD+M). We assessed the serum lipid profile, mRNA expression levels of proteins involved in cholesterol synthesis and reabsorption in the liver and nutrient transporters in the intestines, and cytokine levels. Additionally, an in vitro experiment using HepG2 cells was performed.
Results
Expression of hepatic sterol regulatory element-binding protein 2 (SREBP-2), 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCR), and low-density lipoprotein receptor (LDLR) demonstrated that melatonin administration significantly reduces hepatic cholesterol synthesis in mice fed an HFD. Expression of intestinal sodium-glucose transporter 1 (SGLT1), glucose transporter 2 (GLUT2), GLUT5, and Niemann-pick C1-like 1 (NPC1L1) demonstrated that melatonin administration significantly reduces intestinal carbohydrate and lipid absorption in mice fed an HFD. There were no differences in local and circulatory inflammatory cytokine levels among the NCD, HFD, and HFD+M group. HepG2 cells stimulated with palmitate showed reduced levels of SREBP, LDLR, and HMGCR indicating these results are due to the direct mechanistic effect of melatonin on hepatocytes.
Conclusion
Collectively, these data indicate the mechanism behind the protective effects of melatonin from weight gain and liver steatosis under HFD is through a reduction in intestinal caloric absorption and hepatic cholesterol synthesis highlighting its potential in the treatment of obesity and fatty liver disease.

Citations

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Influence of dark deprivation on the ultrastructure and mitochondrial apparatus of rat hepatocytes
David A. Areshidze
Morphology.2024; 161(3): 53. CrossRef

Diabetes, obesity and metabolism
Greater Severity of Steatosis Is Associated with a Higher Risk of Incident Diabetes: A Retrospective Longitudinal Study: Ji Min Han, Jung Hwan Cho, Hye In Kim, Sunghwan Suh, Yu-Ji Lee, Jung Won Lee, Kwang Min Kim, Ji Cheol Bae; Endocrinol Metab. 2023;38(4):418-425. Published online July 12, 2023; DOI: https://doi.org/10.3803/EnM.2023.1729

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Background
Fatty liver is associated with increased risk of developing type 2 diabetes. We aimed to evaluate whether the severity of hepatic steatosis is associated with incident diabetes.
Methods
We conducted a longitudinal analysis using data from 1,798 participants who underwent a comprehensive health checkup and abdominal computed tomography (CT). We assessed the association between baseline liver attenuation value on non-contrast CT images and risk of incident diabetes. All the participants were categorized into three groups based on the baseline liver attenuation value on non-contrast CT images: without hepatic steatosis (>57 Hounsfield unit [HU]), mild hepatic steatosis (41–57 HU), and moderate to severe hepatic steatosis (≤40 HU).
Results
During a median follow-up period of 5 years, 6.0% of the study participants progressed to diabetes. The incidence of diabetes was 17.3% in the moderate to severe hepatic steatosis group, 9.0% in the mild steatosis group, and 2.9% in those without hepatic steatosis. In a multivariate adjustment model, as compared with participants without hepatic steatosis, those with moderate to severe steatosis had a hazard ratio (HR) of 3.24 (95% confidence interval [CI], 1.64 to 4.2) for the development of diabetes, and those in the mild steatosis group had a HR of 2.33 (95% CI, 1.42 to 3.80). One standard deviation decrease in mean CT attenuation values of the liver was associated with a 40% increase in the development of diabetes (multivariate adjusted HR, 1.40; 95% CI, 1.2 to 1.63).
Conclusion
We found a positive association between severity of hepatic steatosis and risk of incident diabetes. Greater severity of steatosis was associated with a higher risk of incident diabetes.

Citations

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Metabolic Dysfunction-Associated Steatotic Liver Disease: The Role of Hepatic Steatosis in Insulin Resistance and Metabolic Health
Ji Cheol Bae
Endocrinology and Metabolism.2025; 40(2): 304. CrossRef

Brief Report

Diabetes, obesity and metabolism
Performance of Simple Fibrosis Score in Non-Alcoholic Fatty Liver Disease with and without Type 2 Diabetes: Seung Min Chung, Min Kyu Kang, Jun Sung Moon, Jung Gil Park; Endocrinol Metab. 2023;38(2):277-281. Published online March 13, 2023; DOI: https://doi.org/10.3803/EnM.2022.1635

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This cross-sectional study enrolled 267 patients with metabolic risk factors and established non-alcoholic fatty liver disease in the prospective cohort. The performance of fibrosis-4 (FIB-4) score (≥1.3) to diagnose advanced fibrosis using transient elastography (liver stiffness measurement [LSM] ≥8 kPa) was analyzed. Comparing patients with type 2 diabetes (T2D, n=87) and without (n=180), not FIB-4, but LSM was significantly higher in T2D (P=0.026). The prevalence of advanced fibrosis was 17.2% in T2D and 12.8% in non-T2D. FIB-4 exhibited higher proportion of false negatives in T2D patients (10.9%) than those without (5.2%). The diagnostic performance of FIB-4 was suboptimal in T2D (area under curve [AUC], 0.653; 95% confidence interval [CI], 0.462 to 0.844) compared to that in non-T2D (AUC, 0.826; 95% CI, 0.724 to 0.927). In conclusion, patients with T2D might be beneficial to conduct transient elastography without screening to avoid missing advanced fibrosis.

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The effect of semaglutide combined with metformin on liver inflammation and pancreatic beta-cell function in patients with type 2 diabetes and non-alcoholic fatty liver disease
Rong Ren, Yanxia Pei, Lufei Kong, Yixin Shi
Journal of Diabetes and its Complications.2025; 39(2): 108932. CrossRef
Metabolic-Associated Steatotic Liver Disease (MASLD) and Type 2 Diabetes: Mechanisms, Diagnostic Approaches, and Therapeutic Interventions
Anastasia Ntikoudi, Anastasia Papachristou, Afroditi Tsalkitzi, Nikoletta Margari, Eleni Evangelou, Eugenia Vlachou
Diabetology.2025; 6(4): 23. CrossRef
DiabetesLiver score: A non-invasive algorithm for advanced liver fibrosis and liver-related outcomes in type 2 diabetes mellitus population
Chuan Liu, Jie Shen, Jie Li, Zhihui Li, Ming-Hua Zheng, Hua Bian, Xiqiao Zhou, Wenjing Ni, Zhongji Meng, Jiaojian Lv, Yijun Tang, Xuan Liang, Min Li, Taolong Zhou, Heng Wan, Yuping Chen, Yuxia Qi, Yuli Ge, Yan Wang, Wen-Yue Liu, Mingxing Huang, Shanghao L
Med.2025; : 100700. CrossRef
Multiple Definitions of Fatty Liver Disease: Which One Most Accurately Predicts Diabetes?
Eun-Jung Rhee
Endocrinology and Metabolism.2024; 39(2): 397. CrossRef
Insulin Resistance, Non-Alcoholic Fatty Liver Disease and Type 2 Diabetes Mellitus: Clinical and Experimental Perspective
Inha Jung, Dae-Jeong Koo, Won-Young Lee
Diabetes & Metabolism Journal.2024; 48(3): 327. CrossRef
Epidemiology, screening, and co-management of type 2 diabetes mellitus and metabolic dysfunction–associated steatotic liver disease
Xiaolong Qi, Jie Li, Cyrielle Caussy, Gao-Jun Teng, Rohit Loomba
Hepatology.2024;[Epub] CrossRef
Prevalence of High and Moderate Risk of Liver Fibrosis Among Patients With Diabetes at a Noncommunicable Diseases (NCD) Clinic in a Primary Healthcare Center in Northern India
Anubhav Mondal, Aninda Debnath, Ghurumourthy Dhandapani, Abhishek Sharma, Shveta Lukhmana, Geeta Yadav
Cureus.2023;[Epub] CrossRef

Original Article

Diabetes, Obesity and Metabolism
The Impact of Insulin Resistance on Hepatic Fibrosis among United States Adults with Non-Alcoholic Fatty Liver Disease: NHANES 2017 to 2018: Ji Cheol Bae, Lauren A. Beste, Kristina M. Utzschneider; Endocrinol Metab. 2022;37(3):455-465. Published online June 21, 2022; DOI: https://doi.org/10.3803/EnM.2022.1434

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Background
We aimed to investigate the association of hepatic steatosis with liver fibrosis and to assess the interactive effects of hepatic steatosis and insulin resistance on liver fibrosis in a nationally representative sample of United States adults.
Methods
We conducted a cross-sectional analysis using data from National Health and Nutrition Examination Survey 2017 to 2018, which for the first time included transient elastography to assess liver stiffness and hepatic steatosis. We evaluated the association between hepatic steatosis (using controlled attenuation parameter [CAP]) and clinically significant liver fibrosis (defined as liver stiffness ≥7.5 kPa) using logistic regression with an interaction term for hepatic steatosis and insulin resistance (defined as homeostatic model assessment of insulin resistance ≥3.0).
Results
Among adults undergoing transient elastography (n=2,023), 45.9% had moderate or greater hepatic steatosis and 11.3% had clinically significant liver fibrosis. After adjustment for demographic and metabolic factors, the odds of significant liver fibrosis increased as CAP score rose (odds ratio, 1.35 per standard deviation increment; 95% confidence interval, 1.11 to 1.64). We detected a significant interaction effect between CAP score and insulin resistance on the probability of significant liver fibrosis (P=0.016 for interaction). The probability of significant liver fibrosis increased in the presence of insulin resistance with increasing CAP score, while those without insulin resistance had low probability of significant liver fibrosis, even with high CAP scores.
Conclusion
Individuals with hepatic steatosis had higher odds of fibrosis when insulin resistance was present. Our findings emphasize the importance of the metabolic aspects of the disease on fibrosis risk and suggest a need to better identify patients with metabolic associated fatty liver disease.

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Appendicular skeletal muscle mass is associated with metabolic dysfunction-associated steatotic liver disease severity in young men: a cross-sectional and longitudinal study
Jaejun Lee, Jinson So, Chang In Han, Hyun Yang, Pil Soo Sung, Si Hyun Bae, Do Seon Song
Hepatology International.2025; 19(1): 181. CrossRef
Association between the triglyceride-glucose index and liver fibrosis in adults with metabolism-related fatty liver disease in the United States: a cross-sectional study of NHANES 2017–2020
Yuou Ying, Yuan Ji, Ruyi Ju, Jinhan Chen, Mingxian Chen
BMC Gastroenterology.2025;[Epub] CrossRef
The Value of TyG‐Related Indices in Evaluating MASLD and Significant Liver Fibrosis in MASLD
Haoxuan Zou, Jiejie Xie, Xiaopu Ma, Yan Xie, Xingshun Qi
Canadian Journal of Gastroenterology and Hepatology.2025;[Epub] CrossRef
Pathogenic Mechanisms of Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD)-Associated Hepatocellular Carcinoma
Toru Nakamura, Atsutaka Masuda, Dan Nakano, Keisuke Amano, Tomoya Sano, Masahito Nakano, Takumi Kawaguchi
Cells.2025; 14(6): 428. CrossRef
Metabolic Dysfunction-Associated Steatotic Liver Disease: The Role of Hepatic Steatosis in Insulin Resistance and Metabolic Health
Ji Cheol Bae
Endocrinology and Metabolism.2025; 40(2): 304. CrossRef
Association of insulin resistance indicators with hepatic steatosis and fibrosis in patients with metabolic syndrome
Tzu-chia Kuo, Yang-bor Lu, Chieh-lun Yang, Bin Wang, Lin-xin Chen, Ching-ping Su
BMC Gastroenterology.2024;[Epub] CrossRef
No More NAFLD: The Term Is Now MASLD
Ji Cheol Bae
Endocrinology and Metabolism.2024; 39(1): 92. CrossRef
Insulin Resistance/Sensitivity Measures as Screening Indicators of Metabolic-Associated Fatty Liver Disease and Liver Fibrosis
Mohammad E. Khamseh, Mojtaba Malek, Soodeh Jahangiri, Sohrab Nobarani, Azita Hekmatdoost, Marieh Salavatizadeh, Samira Soltanieh, Haleh Chehrehgosha, Hoda Taheri, Zeinab Montazeri, Fereshteh Attaran, Faramarz Ismail-Beigi, Fariba Alaei-Shahmiri
Digestive Diseases and Sciences.2024; 69(4): 1430. CrossRef
The association of Neuromedin U levels and non-alcoholic fatty liver disease: A comparative analysis
Murat Keskin, Sercan Avul, Aylin Beyaz, Nizameddin Koca
Heliyon.2024; 10(5): e27291. CrossRef
Oral Insulin Alleviates Liver Fibrosis and Reduces Liver Steatosis in Patients With Metabolic Dysfunction-associated Steatohepatitis and Type 2 Diabetes: Results of Phase II Randomized, Placebo-controlled Feasibility Clinical Trial
Yuval Ishay, Joel Neutel, Yotam Kolben, Ram Gelman, Orly Sneh Arbib, Oliver Lopez, Helena Katchman, Rizwana Mohseni, Miriam Kidron, Yaron Ilan
Gastro Hep Advances.2024; 3(3): 417. CrossRef
Comparative and Predictive Significance of Serum Leptin Levels in Non-alcoholic Fatty Liver Disease
Mehwish Qamar, Abeer Fatima, Ambreen Tauseef, Muhammad I Yousufzai, Ibrahim Liaqat, Qanbar Naqvi
Cureus.2024;[Epub] CrossRef
Insulin Resistance, Non-Alcoholic Fatty Liver Disease and Type 2 Diabetes Mellitus: Clinical and Experimental Perspective
Inha Jung, Dae-Jeong Koo, Won-Young Lee
Diabetes & Metabolism Journal.2024; 48(3): 327. CrossRef
Metabolic dysfunction-associated steatotic liver disease heterogeneity: Need of subtyping
Shahid Habib
World Journal of Gastrointestinal Pathophysiology.2024;[Epub] CrossRef
Greater Severity of Steatosis Is Associated with a Higher Risk of Incident Diabetes: A Retrospective Longitudinal Study
Ji Min Han, Jung Hwan Cho, Hye In Kim, Sunghwan Suh, Yu-Ji Lee, Jung Won Lee, Kwang Min Kim, Ji Cheol Bae
Endocrinology and Metabolism.2023; 38(4): 418. CrossRef
Hepatic T-cell senescence and exhaustion are implicated in the progression of fatty liver disease in patients with type 2 diabetes and mouse model with nonalcoholic steatohepatitis
Byeong Chang Sim, Yea Eun Kang, Sun Kyoung You, Seong Eun Lee, Ha Thi Nga, Ho Yeop Lee, Thi Linh Nguyen, Ji Sun Moon, Jingwen Tian, Hyo Ju Jang, Jeong Eun Lee, Hyon-Seung Yi
Cell Death & Disease.2023;[Epub] CrossRef
Familial clustering of nonalcoholic fatty liver disease in first‐degree relatives of adults with lean nonalcoholic fatty liver disease
Sorachat Niltwat, Chanin Limwongse, Natthinee Charatcharoenwitthaya, Duangkamon Bunditvorapoom, Wimolrak Bandidniyamanon, Phunchai Charatcharoenwitthaya
Liver International.2023; 43(12): 2713. CrossRef
Metabolic Score for Insulin Resistance Is Inversely Related to Incident Advanced Liver Fibrosis in Patients with Non-Alcoholic Fatty Liver Disease
Jun-Hyuk Lee, Yu-Jin Kwon, Kyongmin Park, Hye Sun Lee, Hoon-Ki Park, Jee Hye Han, Sang Bong Ahn
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Ji Cheol Bae
Endocrinology and Metabolism.2022; 37(6): 858. CrossRef

Review Article

Diabetes, Obesity and Metabolism
State-of-the-Art Overview of the Pharmacological Treatment of Non-Alcoholic Steatohepatitis: Yongin Cho, Yong-ho Lee; Endocrinol Metab. 2022;37(1):38-52. Published online February 28, 2022; DOI: https://doi.org/10.3803/EnM.2022.102

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Non-alcoholic fatty liver disease (NAFLD) is the most common cause of chronic liver disease worldwide, and non-alcoholic steatohepatitis (NASH), a subtype of NAFLD, can progress to cirrhosis, hepatocellular carcinoma, and death. Nevertheless, the current treatment for NAFLD/NASH is limited to lifestyle modifications, and no drugs are currently officially approved as treatments for NASH. Many global pharmaceutical companies are pursuing the development of medications for the treatment of NASH, and results from phase 2 and 3 clinical trials have been published in recent years. Here, we review data from these recent clinical trials and reports on the efficacy of newly developed antidiabetic drugs in NASH treatment.

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Impact of physical activities in metabolic dysfunction associated steatotic liver disease, sarcopenia, and cardiovascular disease
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Diabetes Research and Clinical Practice.2025; 224: 112209. CrossRef
Association of non-alcoholic fatty liver disease with cardiovascular disease and all cause death in patients with type 2 diabetes mellitus: nationwide population based study
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Insulin Resistance, Non-Alcoholic Fatty Liver Disease and Type 2 Diabetes Mellitus: Clinical and Experimental Perspective
Inha Jung, Dae-Jeong Koo, Won-Young Lee
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Mitochondrial Quality Control: Its Role in Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD)
Soyeon Shin, Jaeyoung Kim, Ju Yeon Lee, Jun Kim, Chang-Myung Oh
Journal of Obesity & Metabolic Syndrome.2023; 32(4): 289. CrossRef
Sodium-glucose cotransporter 2 inhibitors for non-alcoholic fatty liver disease in patients with type 2 diabetes mellitus: A nationwide propensity-score matched cohort study
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Diabetes Research and Clinical Practice.2022; 194: 110187. CrossRef

Original Articles

Diabetes, Obesity and Metabolism
Dulaglutide Ameliorates Palmitic Acid-Induced Hepatic Steatosis by Activating FAM3A Signaling Pathway: Jinmi Lee, Seok-Woo Hong, Min-Jeong Kim, Sun Joon Moon, Hyemi Kwon, Se Eun Park, Eun-Jung Rhee, Won-Young Lee; Endocrinol Metab. 2022;37(1):74-83. Published online February 9, 2022; DOI: https://doi.org/10.3803/EnM.2021.1293

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Background
Dulaglutide, a long-acting glucagon-like peptide-1 receptor agonist (GLP-1RA), has been shown to reduce body weight and liver fat content in patients with type 2 diabetes. Family with sequence similarity 3 member A (FAM3A) plays a vital role in regulating glucose and lipid metabolism. The aim of this study was to determine the mechanisms by which dulaglutide protects against hepatic steatosis in HepG2 cells treated with palmitic acid (PA).
Methods
HepG2 cells were pretreated with 400 μM PA for 24 hours, followed by treatment with or without 100 nM dulaglutide for 24 hours. Hepatic lipid accumulation was determined using Oil red O staining and triglyceride (TG) assay, and the expression of lipid metabolism-associated factor was analyzed using quantitative real time polymerase chain reaction and Western blotting.
Results
Dulaglutide significantly decreased hepatic lipid accumulation and reduced the expression of genes associated with lipid droplet binding proteins, de novo lipogenesis, and TG synthesis in PA-treated HepG2 cells. Dulaglutide also increased the expression of proteins associated with lipolysis and fatty acid oxidation and FAM3A in PA-treated cells. However, exendin-(9-39), a GLP-1R antagonist, reversed the expression of FAM3A, and fatty acid oxidation-associated factors increased due to dulaglutide. In addition, inhibition of FAM3A by siRNA attenuated the reducing effect of dulaglutide on TG content and its increasing effect on regulation of fatty acid oxidation.
Conclusion
These results suggest that dulaglutide could be used therapeutically for improving nonalcoholic fatty liver disease, and its effect could be mediated in part via upregulation of FAM3A expression through a GLP-1R-dependent pathway.

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Glucagon-like peptide-1 receptor agonists improve metabolic dysfunction-associated steatotic liver disease outcomes
Brandon Havranek, Rebecca Loh, Beatriz Torre, Rachel Redfield, Dina Halegoua-DeMarzio
Scientific Reports.2025;[Epub] CrossRef
Therapeutic effects and mechanisms of Xinmaitong formula for type 2 diabetes mellitus via GLP-1R signaling
Weidong Pu, Yang Pan, Kang Yang, Jian Gao, Fen Tian, Jingrui Song, Yubing Huang, Yanmei Li
Frontiers in Pharmacology.2025;[Epub] CrossRef
GLP-1/GLP-1RAs: New Options for the Drug Treatment of NAFLD
Haoran Jiang, Linquan Zang
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Tong Bu, Ziyan Sun, Yi Pan, Xia Deng, Guoyue Yuan
Diabetes & Metabolism Journal.2024; 48(3): 354. CrossRef
Insulin Resistance, Non-Alcoholic Fatty Liver Disease and Type 2 Diabetes Mellitus: Clinical and Experimental Perspective
Inha Jung, Dae-Jeong Koo, Won-Young Lee
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Tirzepatide against obesity and insulin-resistance: pathophysiological aspects and clinical evidence
Salvatore Corrao, Chiara Pollicino, Dalila Maggio, Alessandra Torres, Christiano Argano
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Lei Yang, Baoshun Du, Shitao Zhang, Maode Wang
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Jing Li, Han Yan, Rui Xiang, Weili Yang, Jingjing Ye, Ruili Yin, Jichun Yang, Yujing Chi
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Diabetes, Obesity and Metabolism
The Effects of PPAR Agonists on Atherosclerosis and Nonalcoholic Fatty Liver Disease in ApoE^−/−FXR^−/− Mice: Yenna Lee, Bo-Rahm Kim, Geun-Hyung Kang, Gwan Jae Lee, Young Joo Park, Haeryoung Kim, Hak Chul Jang, Sung Hee Choi; Endocrinol Metab. 2021;36(6):1243-1253. Published online December 28, 2021; DOI: https://doi.org/10.3803/EnM.2021.1100

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Background
Farnesoid X receptor (FXR), a bile acid–activated nuclear receptor, is a potent regulator of glucose and lipid metabolism as well as of bile acid metabolism. Previous studies have demonstrated that FXR deficiency is associated with metabolic derangements, including atherosclerosis and nonalcoholic fatty liver disease (NAFLD), but its mechanism remains unclear. In this study, we investigated the role of FXR in atherosclerosis and NAFLD and the effect of peroxisome proliferator-activated receptor (PPAR) agonists in mouse models with FXR deficiency.
Methods
En face lipid accumulation analysis, liver histology, serum levels of glucose and lipids, and mRNA expression of genes related to lipid metabolism were compared between apolipoprotein E (ApoE)^−/− and ApoE^−/−FXR^−/− mice. The effects of PPARα and PPARγ agonists were also compared in both groups of mice.
Results
Compared with ApoE^−/− mice, ApoE^−/−FXR^−/− mice showed more severe atherosclerosis, hepatic steatosis, and higher levels of serum cholesterol, low-density lipoprotein cholesterol, and triglycerides, accompanied by increased mRNA expression of FAS, ApoC2, TNFα, IL-6 (liver), ATGL, TGH, HSL, and MGL (adipocytes), and decreased mRNA expressions of CPT2 (liver) and Tfam (skeletal muscle). Treatment with a PPARα agonist, but not with a PPARγ agonist, partly reversed atherosclerosis and hepatic steatosis, and decreased plasma triglyceride levels in the ApoE^−/−FXR^−/− mice, in association with increased mRNA expression of CD36 and FATP and decreased expression of ApoC2 and ApoC3 (liver).
Conclusion
Loss of FXR is associated with aggravation of atherosclerosis and hepatic steatosis in ApoE-deficient mice, which could be reversed by a PPARα agonist through induction of fatty acid uptake, β-oxidation, and triglyceride hydrolysis.

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Review Article

Diabetes, Obesity and Metabolism
Serotonergic Regulation of Hepatic Energy Metabolism: Jiwon Park, Wooju Jeong, Chahyeon Yun, Hail Kim, Chang-Myung Oh; Endocrinol Metab. 2021;36(6):1151-1160. Published online December 16, 2021; DOI: https://doi.org/10.3803/EnM.2021.1331

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The liver is a vital organ that regulates systemic energy metabolism and many physiological functions. Nonalcoholic fatty liver disease (NAFLD) is the commonest cause of chronic liver disease and end-stage liver failure. NAFLD is primarily caused by metabolic disruption of lipid and glucose homeostasis. Serotonin (5-hydroxytryptamine [5-HT]) is a biogenic amine with several functions in both the central and peripheral systems. 5-HT functions as a neurotransmitter in the brain and a hormone in peripheral tissues to regulate systemic energy homeostasis. Several recent studies have proposed various roles of 5-HT in hepatic metabolism and inflammation using tissue-specific knockout mice and 5-HT-receptor agonists/antagonists. This review compiles the most recent research on the relationship between 5-HT and hepatic metabolism, and the role of 5-HT signaling as a potential therapeutic target in NAFLD.

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Marina Milešević, Ivona Matić Jelić, Viktorija Rumenović, Natalia Ivanjko, Slobodan Vukičević, Tatjana Bordukalo-Nikšić
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Original Articles

Diabetes, Obesity and Metabolism
The Leg Fat to Total Fat Ratio Is Associated with Lower Risks of Non-Alcoholic Fatty Liver Disease and Less Severe Hepatic Fibrosis: Results from Nationwide Surveys (KNHANES 2008–2011): Hyun Min Kim, Yong-ho Lee; Endocrinol Metab. 2021;36(6):1232-1242. Published online November 23, 2021; DOI: https://doi.org/10.3803/EnM.2021.1087

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Background
The prevalence of non-alcoholic fatty liver disease (NAFLD) has rapidly increased worldwide. The aim of this study was to investigate whether there is an independent relationship between regional fat distribution, especially leg fat mass, and the presence of NAFLD using nationally representative data in Korea.
Methods
This cross-sectional study analyzed data from 14,502 participants in the Korea National Health and Nutrition Examination Survey 2008 to 2011. Total fat mass, leg fat mass, and appendicular skeletal muscle mass were measured by dual-energy X-ray absorptiometry. Validated NAFLD prediction models and scoring systems for hepatic fibrosis were used.
Results
The leg fat to total fat (LF/TF) ratio showed a negative relationship with many factors, including body mass index, waist circumference, blood pressure, fasting blood glucose, and liver enzyme levels. When the LF/TF ratio and indices of hepatic steatosis were stratified by quartiles, the LF/TF ratio showed a negative correlation with the scoring systems that were used. The LF/TF ratio showed better accuracy in predicting NAFLD than total fat mass or leg fat mass alone. After adjusting for various traditional and lifestyle factors, a low LF/TF ratio remained a risk factor for NAFLD. Among NAFLD subjects, the LF/TF ratio showed a negative relationship with hepatic fibrosis.
Conclusion
A lower LF/TF ratio was markedly associated with a higher risk of hepatic steatosis and advanced hepatic fibrosis using various predictive models in a Korean population. Therefore, the LF/TF ratio could be a useful anthropometric parameter to predict NAFLD or advanced hepatic fibrosis.

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Waistline to thigh circumference ratio as a predictor of MAFLD: a health care worker study with 2-year follow-up
Xiaoyan Hao, Honghai He, Liyuan Tao, Wei Zhao, Peng Wang
BMC Gastroenterology.2024;[Epub] CrossRef
Regional fat distribution and hepatic fibrosis and steatosis severity in patients with nonalcoholic fatty liver disease and type 2 diabetes
Asieh Mansour, Saeed Pourhassan, Hadis Gerami, Mohammad Reza Mohajeri‐Tehrani, Marziye Salahshour, Ali Abbasi, Elham Madreseh, Sayed Mahmoud Sajjadi‐Jazi
Obesity Science & Practice.2024;[Epub] CrossRef
Insulin Resistance, Non-Alcoholic Fatty Liver Disease and Type 2 Diabetes Mellitus: Clinical and Experimental Perspective
Inha Jung, Dae-Jeong Koo, Won-Young Lee
Diabetes & Metabolism Journal.2024; 48(3): 327. CrossRef
Adipose tissue insulin resistance index was inversely associated with gluteofemoral fat and skeletal muscle mass in Japanese women
Satomi Minato-Inokawa, Mari Honda, Ayaka Tsuboi-Kaji, Mika Takeuchi, Kaori Kitaoka, Miki Kurata, Bin Wu, Tsutomu Kazumi, Keisuke Fukuo
Scientific Reports.2024;[Epub] CrossRef
A greater ratio of thigh subcutaneous fat to abdominal fat is associated with protection against non-alcoholic fatty liver disease
Yebei Liang, Peizhu Chen, Siyu Chen, Dan Liu, Fusong Jiang, Zhijun Zhu, Keqing Dong, Li Wei, Xuhong Hou
JHEP Reports.2023; 5(7): 100730. CrossRef
Association between Alcohol Consumption and Metabolic Dysfunction-Associated Steatotic Liver Disease Based on Alcohol Flushing Response in Men: The Korea National Health and Nutrition Examination Survey 2019–2021
Dae Eon Kang, Si Nae Oh
Nutrients.2023; 15(18): 3901. CrossRef

Diabetes, Obesity and Metabolism
Changes in Insulin Resistance Index and the Risk of Liver Fibrosis in Patients with Nonalcoholic Fatty Liver Disease without Diabetes: Kangbuk Samsung Health Study: Dae-Jeong Koo, Mi Yeon Lee, Inha Jung, Sun Joon Moon, Hyemi Kwon, Se Eun Park, Eun-Jung Rhee, Won-Young Lee; Endocrinol Metab. 2021;36(5):1016-1028. Published online October 21, 2021; DOI: https://doi.org/10.3803/EnM.2021.1110

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Background
Fibrosis is the most important prognostic factor for nonalcoholic fatty liver disease (NAFLD). Insulin resistance plays a key role of fibrosis progression. We evaluated the association between changes in homeostasis model assessment of insulin resistance (HOMA-IR) values and changes in fibrosis status in NAFLD.
Methods
We analyzed the data of 15,728 participants with NAFLD (86% men, mean age 40.5 years) who had no diabetes at baseline and visited our centers for health check-ups both in 2012 and 2016. The participants were classified into four groups according to the degree of change in HOMA-IR values from baseline to the end of follow-up: G1 (<0), G2 (0–0.50), G3 (0.51–1.00), and G4 (>1.00). NAFLD was assessed by ultrasonography, and fibrosis status was evaluated by the NAFLD fibrosis score (NFS) and the aspartate aminotransferase to platelet ratio index (APRI).
Results
After the 4-year follow-up, the multivariable-adjusted odds ratio (OR) for progression of fibrosis probability increased with increasing HOMA-IR values (OR, 2.25; 95% confidence interval [CI], 1.87 to 2.71 for NFS; and OR, 2.55; 95% CI, 2.05 to 3.18 for APRI, G4). This tendency remained consistent throughout the subgroup analyses, except in those for female sex and a body mass index <25 kg/m². The OR for regression of fibrosis probability decreased with increasing HOMA-IR values (OR, 0.33; 95% CI, 0.25 to 0.43 for NFS, G4).
Conclusion
Changes in HOMA-IR values were associated with changes in fibrosis status in patients with NAFLD without diabetes, which underscores the role of insulin resistance in liver fibrosis.

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Sang Yi Moon, Minkook Son, Yeo Wool Kang, Myeongseok Koh, Jong Yoon Lee, Yang Hyun Baek
BMC Gastroenterology.2025;[Epub] CrossRef
Application of insulin resistance score in type 2 diabetes mellitus complicated with fatty liver and liver fibrosis
Shaojie Duan, Mengdie Chen, Jie Chen, Yaojian Shao, Xiaolong Jin, Chaohui Wang, Ping Feng, Xiaosheng Teng, Zhenjun Yu
European Journal of Gastroenterology & Hepatology.2025;[Epub] CrossRef
Insulin Resistance/Sensitivity Measures as Screening Indicators of Metabolic-Associated Fatty Liver Disease and Liver Fibrosis
Mohammad E. Khamseh, Mojtaba Malek, Soodeh Jahangiri, Sohrab Nobarani, Azita Hekmatdoost, Marieh Salavatizadeh, Samira Soltanieh, Haleh Chehrehgosha, Hoda Taheri, Zeinab Montazeri, Fereshteh Attaran, Faramarz Ismail-Beigi, Fariba Alaei-Shahmiri
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Gyuri Kim, Tae Yang Yu, Jae Hwan Jee, Ji Cheol Bae, Mira Kang, Jae Hyeon Kim
Diabetes & Metabolism.2024; 50(3): 101534. CrossRef
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Takumi Kawaguchi, Kenta Murotani, Hiromitsu Kajiyama, Hitoshi Obara, Hironori Yamaguchi, Yuko Toyofuku, Fumi Kaneko, Yutaka Seino, Saeko Uchida
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Yu Luo, Cuiyu Wang, Tian Zhang, Xiaoyu He, Jianan Hao, Andong Shen, Hang Zhao, Shuchun Chen, Luping Ren
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Ángel Arturo López-González, Bárbara Altisench Jané, Luis Masmiquel Comas, Sebastiana Arroyo Bote, Hilda María González San Miguel, José Ignacio Ramírez Manent
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Metabolic Score for Insulin Resistance Is Inversely Related to Incident Advanced Liver Fibrosis in Patients with Non-Alcoholic Fatty Liver Disease
Jun-Hyuk Lee, Yu-Jin Kwon, Kyongmin Park, Hye Sun Lee, Hoon-Ki Park, Jee Hye Han, Sang Bong Ahn
Nutrients.2022; 14(15): 3039. CrossRef
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Kexing Han, Kexuan Tan, Jiapei Shen, Yuting Gu, Zilong Wang, Jiayu He, Luyang Kang, Weijie Sun, Long Gao, Yufeng Gao
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