Endocrinology and Metabolism

Review Article

Diabetes, obesity and metabolism
Prevalence and Current Status of Cardiometabolic Risk Factors in Korean Adults Based on Fact Sheets 2024: Eun-Jung Rhee; Endocrinol Metab. 2025;40(2):174-184. Published online April 24, 2025; DOI: https://doi.org/10.3803/EnM.2025.2398

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Abstract PDF PubReader ePub: Korea has entered ‘super-aged’ society in 2025 with the proportion of people 65 years or older exceeding 20% as of the end of the year 2024. The health burden of cardiovascular diseases increases with age, and the increasing prevalence of cardiovascular risk factors, such as obesity, hypertension, diabetes mellitus, and dyslipidemia, may be linked to increased population-level cardiovascular risk. According to data from 2022, the overall prevalence of obesity reached 38.4%, marking a continued upward trend, based on National Health Insurance medical checkup data. In the combined data of 2021 to 2022, the prevalence of diabetes was 15.5% in Koreans older than 30 years according to the Diabetes Fact Sheet 2024 published by the Korean Diabetes Association, based on data from the Korean National Health and Nutrition Examination Survey. The prevalence of hypertension in the total population of Korea in 2022 was 30% according to the Korean Hypertension Fact Sheet produced by the Korean Society of Hypertension. Lastly, the prevalence of dyslipidemia in 2022 was 40.9% according to the Dyslipidemia Fact Sheet published by the Korean Society of Lipid and Atherosclerosis. In this article, I would like to review the prevalence and current management of cardiovascular risk factors in Korea according to the fact sheets released by various associations in 2024.

Original Article

Exendin-4(1-32)K-Capric Acid, a Glucagon-Like Peptide-1 Receptor Agonist, Suppresses Food Intake via Arcuate Pro-Opiomelanocortin Neurons: Sujin Yoo, Eun-Seon Yoo, Jae Il Kim, Jong-Woo Sohn; Received September 23, 2024 Accepted December 18, 2024 Published online April 14, 2025; DOI: https://doi.org/10.3803/EnM.2024.2185 [Epub ahead of print]

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Abstract PDF Supplementary Material PubReader ePub: Background
Glucagon-like peptide-1 (GLP-1) is an incretin known for its anti-obesity effects, and several effective drugs targeting GLP-1 receptors (GLP-1Rs) have recently been developed to treat obesity. Although GLP-1Rs are expressed by various populations of central neurons, it is still unclear which specific populations mediate the anti-obesity effects of GLP-1R agonists.
Methods
In this study, we utilized the previously reported GLP-1R agonist, exendin-4(1-32)K-capric acid (Ex-4c), and conducted whole-cell patch-clamp recordings, immunohistochemistry experiments, and in vivo food intake measurements.
Results
Our findings indicate that the appetite-suppressing effects of Ex-4c depend on pro-opiomelanocortin (POMC) neurons. Fos immunochemistry experiments and whole-cell patch-clamp recordings showed that Ex-4c activated POMC neurons in the arcuate nucleus of the hypothalamus. Additionally, we observed that Ex-4c stimulated GLP-1Rs and activated the protein kinase A (PKA)- dependent signaling pathway, which in turn closed putative adenosine triphosphate-sensitive K⁺ (K_ATP) channels, leading to the depolarization of POMC neurons.
Conclusion
Our results demonstrate that the appetite-suppressing effects of Ex-4c are mediated through the activation of arcuate POMC neurons. Furthermore, the PKA-dependent closure of putative K_ATP conductance is identified as the cellular mechanism responsible for the activation of POMC neurons.

Brief Report

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

Diabetes, obesity and metabolism
Tirzepatide and Cancer Risk in Individuals with and without Diabetes: A Systematic Review and Meta-Analysis: A.B.M. Kamrul-Hasan, Muhammad Shah Alam, Deep Dutta, Thanikai Sasikanth, Fatema Tuz Zahura Aalpona, Lakshmi Nagendra; Endocrinol Metab. 2025;40(1):112-124. Published online January 15, 2025; DOI: https://doi.org/10.3803/EnM.2024.2164

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Background
Data on the carcinogenic potential of tirzepatide from randomized controlled trials (RCTs) are limited. Furthermore, no meta-analysis has included all relevant RCTs to assess the cancer risk associated with tirzepatide.
Methods
RCTs involving patients receiving tirzepatide in the intervention arm and either a placebo or any active comparator in the control arm were searched through electronic databases. The primary outcome was the overall risk of any cancer, and secondary outcomes were the risks of specific types of cancer in the tirzepatide versus the control groups.
Results
Thirteen RCTs with 13,761 participants were analyzed. Over 26 to 72 weeks, the tirzepatide and pooled control groups had identical risks of any cancer (risk ratio, 0.78; 95% confidence interval, 0.53 to 1.16; P=0.22). The two groups had comparable cancer risks in patients with and without diabetes. In subgroup analyses, the risks were also similar in the tirzepatide versus placebo, insulin, and glucagon-like peptide-1 receptor agonist groups. The overall cancer risk was also comparable for different doses of tirzepatide compared to the control groups; only a 10-mg tirzepatide dose had a lower risk of any cancer than placebo. Furthermore, compared to the control groups (pooled or separately), tirzepatide did not increase the risk of any specific cancer types. Despite greater increments in serum calcitonin with 10- and 15-mg tirzepatide doses than with placebo, the included RCTs reported no cases of papillary thyroid carcinoma.
Conclusion
Tirzepatide use in RCTs over 26 to 72 weeks did not increase overall or specific cancer risk.

Citations

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Dietary and pharmacological energy restriction and exercise for healthspan extension
Maria Lastra Cagigas, Isabella De Ciutiis, Andrius Masedunskas, Luigi Fontana
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Thyroid
Prevalence of Subclinical Hypothyroidism in a Non-Diabetic Young Female Population and Its Impact on Diabetes and Cardiometabolic Risk: Nawoda Hewage, Udaya Wijesekara, Rasika Perera; Endocrinol Metab. 2024;39(6):864-876. Published online November 5, 2024; DOI: https://doi.org/10.3803/EnM.2024.2015

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Abstract PDF PubReader ePub: Background
We evaluated the influence of subclinical hypothyroidism (SCH) on insulin resistance (IR), cardiometabolic risk, and obesity in childbearing-age women without diabetes.
Methods
This cross-sectional investigation included 282 women, aged 18 to 35 years, from rural and suburban Sri Lanka. Anthropometric and biochemical parameters, including IR and lipid/thyroid profiles, were recorded. Data were compared between SCH and euthyroidism (EU) for controls (normal weight) and cases (overweight/obese).
Results
The overall rates of SCH, EU, IR, and metabolic syndrome (MetS) were 40.42%, 59.57%, 73.40%, and 24.46%, respectively. Both controls and cases included individuals with SCH; overall, 168 participants (59.57%) had EU, while 114 (40.42%) exhibited SCH. IR was significantly associated with SCH in both weight groups (P<0.05). Among those with SCH, the odds ratios (ORs) for IR were >2 (95% confidence interval [CI], 0.45 to 3.87) in controls and >6 (95% CI, 3.52 to 8.41) in cases. Similarly, the ORs for MetS were >1 (95% CI, 0.38 to 4.16) in controls and >11 (95% CI, 8.73 to 15.01) in cases. Dyslipidemia and hypertriglyceridemia were significantly more prevalent in the SCH group (P<0.05). Women with SCH exhibited higher mean values for all obesity indices compared to their EU counterparts, surpassing normal thresholds (P<0.05). Among obesity measures, visceral adiposity index (VAI) demonstrated the highest area under the curve and sensitivity for assessing SCH and cardiovascular disease (CVD) risk.
Conclusion
SCH must be identified and managed in young women to help prevent diabetes and cardiometabolic disorders. VAI may aid in precisely detecting SCH and CVD.

Review Articles

Diabetes, obesity and metabolism
Epidemiology and Trends of Obesity and Bariatric Surgery in Korea: Kyungdo Han, Jin-Hyung Jung, Su-Min Jeong, Mee Kyoung Kim; Endocrinol Metab. 2024;39(5):678-685. Published online August 2, 2024; DOI: https://doi.org/10.3803/EnM.2024.2056

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The prevalence of obesity in Korea has steadily increased over the past decade, reaching 38.4% in 2021. Notably, the rate of class II– III obesity, defined as a body mass index (BMI) of 30 kg/m² or higher, exceeded 7% in the same year. Since January 2019, the National Health Insurance Service (NHIS) has provided coverage for bariatric surgery (BS) for eligible patients. Coverage is available for individuals with a BMI of 35 kg/m² or higher, or those with a BMI of 30 kg/m² or higher who also have obesity-related comorbidities. Additionally, partial reimbursement is offered for BS in patients with type 2 diabetes mellitus who have BMI values between 27.5 and 30 kg/m². From 2019 to 2022, the NHIS recorded 9,080 BS procedures, with sleeve gastrectomy being the most commonly performed. The average percentage of weight loss 198±99.7 days post-surgery was 17.9%, with 80.0% of patients losing more than 10% of their body weight. This article presents the trends in obesity and BS in Korea.

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Impact of caloric restriction on diabetes remission in Korean adults with obesity (CREDO‐K study)
Mee Kyoung Kim, Jinyoung Kim, Su‐Jeong Park, Yoon‐Ju Song, Hyuk‐Sang Kwon
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Diabetes Progression and Its Impact on Kidney Cancer Risk: Insights From a Longitudinal Korean Cohort Study
Jin Yu, Bongseong Kim, Kyungdo Han, Mee Kyoung Kim
The Journal of Clinical Endocrinology & Metabolism.2025;[Epub] CrossRef

Diabetes, obesity and metabolism
Glucagon-Like Peptide-1 Based Therapies: A New Horizon in Obesity Management: Jang Won Son, Soo Lim; Endocrinol Metab. 2024;39(2):206-221. Published online April 16, 2024; DOI: https://doi.org/10.3803/EnM.2024.1940

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Obesity is a significant risk factor for health issues like type 2 diabetes and cardiovascular disease. It often proves resistant to traditional lifestyle interventions, prompting a need for more precise therapeutic strategies. This has led to a focus on signaling pathways and neuroendocrine mechanisms to develop targeted obesity treatments. Recent developments in obesity management have been revolutionized by introducing novel glucagon-like peptide-1 (GLP-1) based drugs, such as semaglutide and tirzepatide. These drugs are part of an emerging class of nutrient-stimulated hormone-based therapeutics, acting as incretin mimetics to target G-protein–coupled receptors like GLP-1, glucose-dependent insulinotropic polypeptide (GIP), and glucagon. These receptors are vital in regulating body fat and energy balance. The development of multiagonists, including GLP-1–glucagon and GIP–GLP-1–glucagon receptor agonists, especially with the potential for glucagon receptor activation, marks a significant advancement in the field. This review covers the development and clinical efficacy of various GLP-1-based therapeutics, exploring the challenges and future directions in obesity management.

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The Critical Role of Body Composition Assessment in Advancing Research and Clinical Health Risk Assessment across the Lifespan
Jonathan P. Bennett, Soo Lim
Journal of Obesity & Metabolic Syndrome.2025; 34(2): 120. CrossRef
Diabetes and Osteoarthritis: Exploring the Interactions and Therapeutic Implications of Insulin, Metformin, and GLP-1-Based Interventions
Iryna Halabitska, Liliia Babinets, Valentyn Oksenych, Oleksandr Kamyshnyi
Biomedicines.2024; 12(8): 1630. CrossRef
Why you should not skip tailored exercise interventions when using incretin mimetics for weight loss
Katharina Gross, Christian Brinkmann
Frontiers in Endocrinology.2024;[Epub] CrossRef
Beyond Glycemic Control: GLP-1 Receptor Agonists and Their Impact on Calcium Homeostasis in Real-World Patients
Bandar T. Alenezi, Nadra Elfezzani, Rukhsana Uddin, Hinali Patel, Sydney Chester, Ahmed Abdelmaksoud, Mohammad H. Hussein, Sawsan A. Zaitone, Manal S. Fawzy, Hani Aiash, Eman A. Toraih
Journal of Clinical Medicine.2024; 13(16): 4896. CrossRef
Innovative approaches to the treatment of obesity: from pharmacotherapy to nanomedicine
T. I. Romantsova
Obesity and metabolism.2024; 21(4): 389. CrossRef
Semaglutide effects on cardiovascular outcomes in individuals with overweight or obesity who do not have diabetes: a systematic review
Anna Klasa, Aleksandra Ewa Sobaś, Kamil Biedka, Oliwia Ziobro, Katarzyna Błaszczyk, Jakub Maciej Bulski, Filip Maj, Karol Sornat, Barbara Pokora, Agata Estreicher
Medical Science Pulse.2024;[Epub] CrossRef

Diabetes, obesity and metabolism
The Road towards Triple Agonists: Glucagon-Like Peptide 1, Glucose-Dependent Insulinotropic Polypeptide and Glucagon Receptor - An Update: Agnieszka Jakubowska, Carel W. le Roux, Adie Viljoen; Endocrinol Metab. 2024;39(1):12-22. Published online February 14, 2024; DOI: https://doi.org/10.3803/EnM.2024.1942

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Abstract PDF PubReader ePub

Obesity is the fifth leading risk factor for global deaths with numbers continuing to increase worldwide. In the last 20 years, the emergence of pharmacological treatments for obesity based on gastrointestinal hormones has transformed the therapeutic landscape. The successful development of glucagon-like peptide-1 (GLP-1) receptor agonists, followed by the synergistic combined effect of glucose-dependent insulinotropic polypeptide (GIP)/GLP-1 receptor agonists achieved remarkable weight loss and glycemic control in those with the diseases of obesity and type 2 diabetes. The multiple cardiometabolic benefits include improving glycemic control, lipid profiles, blood pressure, inflammation, and hepatic steatosis. The 2023 phase 2 double-blind, randomized controlled trial evaluating a GLP-1/GIP/glucagon receptor triagonist (retatrutide) in patients with the disease of obesity reported 24.2% weight loss at 48 weeks with 12 mg retatrutide. This review evaluates the current available evidence for GLP-1 receptor agonists, dual GLP-1/GIP receptor co-agonists with a focus on GLP-1/GIP/glucagon receptor triagonists and discusses the potential future benefits and research directions.

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Moaz Safwan, Mariam Safwan Bourgleh, Shahad Abdullah Alotaibi, Eman Alotaibi, Abdulsalam Al-Ruqi, Fathiya El Raeya
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International Journal of Molecular Sciences.2024; 25(8): 4407. CrossRef
New Molecules in Type 2 Diabetes: Advancements, Challenges and Future Directions
Kyriazoula Chatzianagnostou, Melania Gaggini, Adrian Suman Florentin, Ludovica Simonini, Cristina Vassalle
International Journal of Molecular Sciences.2024; 25(11): 6218. CrossRef
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Maria Antonietta Riemma, Elena Mele, Maria Donniacuo, Marialucia Telesca, Gabriella Bellocchio, Giuseppe Castaldo, Francesco Rossi, Antonella De Angelis, Donato Cappetta, Konrad Urbanek, Liberato Berrino
Frontiers in Pharmacology.2024;[Epub] CrossRef
Mechanisms of Glucagon Receptor Agonism and GLP-1/Glucagon/GIP Receptor Triple Agonism for Treatment of Diabetes and Obesity
Se Hee Min
The Journal of Korean Diabetes.2024; 25(2): 82. CrossRef
Structural insights into the triple agonism at GLP-1R, GIPR and GCGR manifested by retatrutide
Wenzhuo Li, Qingtong Zhou, Zhaotong Cong, Qingning Yuan, Wenxin Li, Fenghui Zhao, H. Eric Xu, Li-Hua Zhao, Dehua Yang, Ming-Wei Wang
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Molecular Mechanisms behind Obesity and Their Potential Exploitation in Current and Future Therapy
Michał Nicze, Adrianna Dec, Maciej Borówka, Damian Krzyżak, Aleksandra Bołdys, Łukasz Bułdak, Bogusław Okopień
International Journal of Molecular Sciences.2024; 25(15): 8202. CrossRef
Semaglutide “Ozempic” Face and Implications in Cosmetic Dermatology
Karen Montecinos, Barbara Kania, David J. Goldberg
Dermatological Reviews.2024;[Epub] CrossRef
GLP-1 Receptor Agonists and SGLT2 Inhibitors in Type 2 Diabetes: Pleiotropic Cardiometabolic Effects and Add-on Value of a Combined Therapy
André J. Scheen
Drugs.2024; 84(11): 1347. CrossRef
Retatrutide
Nathan Ramsbacher
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The power of three: Retatrutide's role in modern obesity and diabetes therapy
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European Journal of Pharmacology.2024; 985: 177095. CrossRef
Old and new anti-obesity drugs
Salimeh Dodangeh, Shirin Hasani-Ranjbar
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Innovative approaches to the treatment of obesity: from pharmacotherapy to nanomedicine
T. I. Romantsova
Obesity and metabolism.2024; 21(4): 389. CrossRef

Miscellaneous
Toward Systems-Level Metabolic Analysis in Endocrine Disorders and Cancer: Aliya Lakhani, Da Hyun Kang, Yea Eun Kang, Junyoung O. Park; Endocrinol Metab. 2023;38(6):619-630. Published online November 21, 2023; DOI: https://doi.org/10.3803/EnM.2023.1814

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Metabolism is a dynamic network of biochemical reactions that support systemic homeostasis amidst changing nutritional, environmental, and physical activity factors. The circulatory system facilitates metabolite exchange among organs, while the endocrine system finely tunes metabolism through hormone release. Endocrine disorders like obesity, diabetes, and Cushing’s syndrome disrupt this balance, contributing to systemic inflammation and global health burdens. They accompany metabolic changes on multiple levels from molecular interactions to individual organs to the whole body. Understanding how metabolic fluxes relate to endocrine disorders illuminates the underlying dysregulation. Cancer is increasingly considered a systemic disorder because it not only affects cells in localized tumors but also the whole body, especially in metastasis. In tumorigenesis, cancer-specific mutations and nutrient availability in the tumor microenvironment reprogram cellular metabolism to meet increased energy and biosynthesis needs. Cancer cachexia results in metabolic changes to other organs like muscle, adipose tissue, and liver. This review explores the interplay between the endocrine system and systems-level metabolism in health and disease. We highlight metabolic fluxes in conditions like obesity, diabetes, Cushing’s syndrome, and cancers. Recent advances in metabolomics, fluxomics, and systems biology promise new insights into dynamic metabolism, offering potential biomarkers, therapeutic targets, and personalized medicine.

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Editorial: Tumor metabolism and programmed cell death
Dan-Lan Pu, Qi-Nan Wu
Frontiers in Endocrinology.2024;[Epub] CrossRef
Molecular subtypes of clear cell renal carcinoma based on PCD-related long non-coding RNAs expression: insights into the underlying mechanisms and therapeutic strategies
Han Wang, Yang Liu, Aifa Tang, Xiansheng Zhang
European Journal of Medical Research.2024;[Epub] CrossRef

Diabetes, obesity and metabolism
The Impact of Taurine on Obesity-Induced Diabetes Mellitus: Mechanisms Underlying Its Effect: Kainat Ahmed, Ha-Neul Choi, Jung-Eun Yim; Endocrinol Metab. 2023;38(5):482-492. Published online October 17, 2023; DOI: https://doi.org/10.3803/EnM.2023.1776

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This review explores the potential benefits of taurine in ameliorating the metabolic disorders of obesity and type 2 diabetes (T2D), highlighting the factors that bridge these associations. Relevant articles and studies were reviewed to conduct a comprehensive analysis of the relationship between obesity and the development of T2D and the effect of taurine on those conditions. The loss of normal β-cell function and development of T2D are associated with obesity-derived insulin resistance. The occurrence of diabetes has been linked to the low bioavailability of taurine, which plays critical roles in normal β-cell function, anti-oxidation, and anti-inflammation. The relationships among obesity, insulin resistance, β-cell dysfunction, and T2D are complex and intertwined. Taurine may play a role in ameliorating these metabolic disorders through different pathways, but further research is needed to fully understand its effects and potential as a therapeutic intervention.

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Enhancing metformin efficacy with cholecalciferol and taurine in diabetes therapy: Potential and limitations
Gehan El-Akabawy, Nabil Eid
World Journal of Diabetes.2025;[Epub] CrossRef
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Kainat Ahmed, Ha-Neul Choi, Sung-Rae Cho, Jung-Eun Yim
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Original Article

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.

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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

Review Article

Diabetes, Obesity and Metabolism Big Data Articles (National Health Insurance Service Database)
Big Data Research in the Field of Endocrine Diseases Using the Korean National Health Information Database: Sun Wook Cho, Jung Hee Kim, Han Seok Choi, Hwa Young Ahn, Mee Kyoung Kim, Eun Jung Rhee; Endocrinol Metab. 2023;38(1):10-24. Published online February 9, 2023; DOI: https://doi.org/10.3803/EnM.2023.102

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The Korean National Health Information Database (NHID) contains big data combining information obtained from the National Health Insurance Service and health examinations. Data are provided in the form of a cohort, and the NHID can be used to conduct longitudinal studies and research on rare diseases. Moreover, data on the cause and date of death are provided by Statistics Korea. Research and publications based on the NHID have increased explosively in the field of endocrine disorders. However, because the data were not collected for research purposes, studies using the NHID have limitations, particularly the need for the operational definition of diseases. In this review, we describe the characteristics of the Korean NHID, operational definitions of endocrine diseases used for research, and an overview of recent studies in endocrinology using the Korean NHID.

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Different Associations between Lipid Levels and Risk for Heart Failure according to Diabetes Progression
Seung-Hwan Lee, Kyu Na Lee, Jong-Chan Youn, Hun Sung Kim, Kyungdo Han, Mee Kyoung Kim
Diabetes & Metabolism Journal.2025; 49(1): 105. CrossRef
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Original Articles

Diabetes, Obesity and Metabolism
Sleep Duration and the Risk of Type 2 Diabetes: A Community-Based Cohort Study with a 16-Year Follow-up: Da Young Lee, Inha Jung, So Young Park, Ji Hee Yu, Ji A Seo, Kyeong Jin Kim, Nam Hoon Kim, Hye Jin Yoo, Sin Gon Kim, Kyung Mook Choi, Sei Hyun Baik, Seung Ku Lee, Chol Shin, Nan Hee Kim; Endocrinol Metab. 2023;38(1):146-155. Published online February 6, 2023; DOI: https://doi.org/10.3803/EnM.2022.1582

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Abstract PDF PubReader ePub

Background
We aimed to investigate the moderating effects of obesity, age, and sex on the association between sleep duration and the development of diabetes in Asians.
Methods
We analyzed data from a cohort of the Korean Genome and Epidemiology Study conducted from 2001 to 2020. After excluding shift workers and those with diabetes at baseline, 7,407 participants were stratified into three groups according to sleep duration: ≤5 hours/night, >5 to 7 hours/night (reference), and >7 hours/night. The Cox proportional hazards analyses were used to calculate the hazard ratios (HRs) and 95% confidence intervals (CIs) for incident type 2 diabetes mellitus (T2DM). Subgroup analyses were performed according to obesity, age, and sex.
Results
During 16 years of follow-up, 2,024 cases of T2DM were identified. Individuals who slept ≤5 h/night had a higher risk of incident diabetes than the reference group (HR, 1.17; 95% CI, 1.02 to 1.33). The subgroup analysis observed a valid interaction with sleep duration only for obesity. A higher risk of T2DM was observed in the ≤5 hours/night group in non-obese individuals, men, and those aged <60 years, and in the >7 hours/night group in obese individuals (HRs were 1.34 [95% CI, 1.11 to 1.61], 1.22 [95% CI, 1 to 1.49], and 1.18 [95% CI, 1.01 to 1.39], respectively).
Conclusion
This study confirmed the effect of sleep deprivation on the risk of T2DM throughout the 16-year follow-up period. This impact was confined to non-obese or young individuals and men. We observed a significant interaction between sleep duration and obesity.

Citations

Citations to this article as recorded by

Sleep features and the risk of type 2 diabetes mellitus: a systematic review and meta-analysis
Hongyi Liu, Hui Zhu, Qinkang Lu, Wen Ye, Tao Huang, Yuqiong Li, Bingqi Li, Yingxin Wu, Penghao Wang, Tao Chen, Jin Xu, Lindan Ji
Annals of Medicine.2025;[Epub] CrossRef
The potential impact of habitual sleep quality on glycaemic control and inflammation: A study on geriatric patients recently diagnosed with type 2 diabetes mellitus (T2DM)
Nadia Hussain, Amal Hussain Ibrahim Al Haddad, Saima Abbass, Zina Alfahl
Sleep Medicine: X.2025; 9: 100139. CrossRef
The link between sleep duration and stroke risk
Yu Cheng, Yuchuan Ding, Ahmed Elmadhoun, Xunming Ji, Xiaokun Geng
Brain Circulation.2025; 11(1): 1. CrossRef
Association between obstructive sleep apnea risk and atherosclerosis: A nationwide cross-sectional study in the Korean population
Il Rae Park, Yong Geun Chung, Seung Min Chung, Jun Sung Moon, Ji Sung Yoon, Kyu Chang Won, Qian Wu
PLOS One.2025; 20(5): e0322897. CrossRef
Attention to Innate Circadian Rhythm and the Impact of Its Disruption on Diabetes
Da Young Lee, Inha Jung, So Young Park, Ji Hee Yu, Ji A Seo, Kyeong Jin Kim, Nam Hoon Kim, Hye Jin Yoo, Sin Gon Kim, Kyung Mook Choi, Sei Hyun Baik, Nan Hee Kim
Diabetes & Metabolism Journal.2024; 48(1): 37. CrossRef
Role of Sleep and Sleep Disorders in Cardiometabolic Risk: a Review and Update
Shaden O. Qasrawi, Ahmed S. BaHammam
Current Sleep Medicine Reports.2024; 10(1): 34. CrossRef
Evaluating reliability in wearable devices for sleep staging
Vera Birrer, Mohamed Elgendi, Olivier Lambercy, Carlo Menon
npj Digital Medicine.2024;[Epub] CrossRef
Replication Study of Genome Wide Association Study of Sleep Duration in Korean Association Resources Cohort
Seok-Ho Cho, Seon-Ah Kim, Hyun-Seok Jin, Hong Sung Kim
Biomedical Science Letters.2024; 30(2): 86. CrossRef
Insights into optimal BMI from the GlasVEGAS study
Chun-Kwan O, Juliana C. N. Chan
Nature Metabolism.2024; 6(8): 1435. CrossRef
Mechanisms, consequences and role of interventions for sleep deprivation: Focus on mild cognitive impairment and Alzheimer’s disease in elderly
Upasana Mukherjee, Ujala Sehar, Malcolm Brownell, P. Hemachandra Reddy
Ageing Research Reviews.2024; 100: 102457. CrossRef
The Relationship Between the Risk of Type 2 Diabetes and Insomnia Severity and Sleep Duration in Academicians
Tuğba Bilgehan, Esra Çalık Var
Sağlık Bilimleri Üniversitesi Hemşirelik Dergisi.2024; 6(3): 203. CrossRef
All That Glitters Is Not Gold: The Same Sleep Time, but Different Diabetogenic Outcomes
Bohye Kim, Obin Kwon
Endocrinology and Metabolism.2023; 38(1): 78. CrossRef
The Link Between Sleeping and Type 2 Diabetes: A Systematic Review
Ali Darraj
Cureus.2023;[Epub] CrossRef

Diabetes, Obesity and Metabolism
Association of Shift Work with Normal-Weight Obesity in Community-Dwelling Adults: Chul Woo Ahn, Sungjae Shin, Seunghyun Lee, Hye-Sun Park, Namki Hong, Yumie Rhee; Endocrinol Metab. 2022;37(5):781-790. Published online October 25, 2022; DOI: https://doi.org/10.3803/EnM.2022.1532

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Background
Shift work is associated with obesity and metabolic syndrome. However, this association in the normal-weight population remains unclear. This study aimed to investigate whether shift work is associated with normal-weight obesity (NWO).
Methods
From the nationally representative Korea National Health and Nutrition Examination Survey (KNHANES) dataset (2008 to 2011), 3,800 full-time workers aged ≥19 years with a body mass index (BMI) ≤25 kg/m² were analysed. We defined NWO as BMI ≤25 kg/m² and body fat percentage ≥25% in men and ≥37% in women. Working patterns were classified into “daytime,” “other than daytime,” and “shift.” Multivariable logistic regression analysis was performed to evaluate the relationship between shift work and NWO.
Results
Shift work was associated with higher odds of NWO than daytime work (adjusted odds ratio [aOR], 1.47; 95% confidence interval [CI], 1.04 to 2.09) and night/evening work (aOR, 1.87; 95% CI, 1.11 to 3.14) after adjustment for type of work, working hours, age, sex, BMI, 25-hydroxyvitamin D levels, homeostatic model assessment for insulin resistance, and other sociodemographic factors. In subgroup analyses, the association between shift work and NWO was more robust in those aged ≥60 years and those working ≥56 hours/week.
Conclusion
Shift work was associated with NWO in community-dwelling Korean adults, independent of age, sex, BMI, and other covariates.

Citations

Citations to this article as recorded by

The research progress and prospects of circadian rhythm in obesity: a bibliometric analysis
Ye Dou, Xiaojin Guo, Xuefei Wang, Aolong He, Fanghe Li, Kuo Gao
Frontiers in Nutrition.2025;[Epub] CrossRef
Normal Weight Obesity Overview and Update: A narrative review
Antonino De Lorenzo, Paola Gualtieri, Giulia Frank, Roselisa Palma, Rossella Cianci, Leonardo Romano, Lucilla Ciancarella, Glauco Raffaelli, Laura Di Renzo
Current Obesity Reports.2025;[Epub] CrossRef
Association of Shift Work, Sociodemographic Variables and Healthy Habits with Obesity Scales
Javier Tosoratto, Pedro Juan Tárraga López, Ángel Arturo López-González, Daniela Vallejos, Emilio Martínez-Almoyna Rifá, José Ignacio Ramirez-Manent
Life.2024; 14(11): 1503. CrossRef
Impaired Melatonin Secretion, Oxidative Stress and Metabolic Syndrome in Night Shift Work
Sorina Hohor, Cristina Mandanach, Andreea Maftei, Corina Aurelia Zugravu, Marina Ruxandra Oțelea
Antioxidants.2023; 12(4): 959. CrossRef
Normal-Weight Obesity and Metabolic Syndrome in Korean Adults: A Population-Based Cross-Sectional Study
Jeonghyeon Kim, Seamon Kang, Hyunsik Kang
Healthcare.2023; 11(16): 2303. CrossRef
You Can’t Avoid Shift Work? Then Focus on Body Fat Rather than Weight
Eun Kyung Lee
Endocrinology and Metabolism.2022; 37(5): 756. CrossRef

Diabetes, Obesity and Metabolism
High Cardiorespiratory Fitness Protects against Molecular Impairments of Metabolism, Heart, and Brain with Higher Efficacy in Obesity-Induced Premature Aging: Patcharapong Pantiya, Chanisa Thonusin, Natticha Sumneang, Benjamin Ongnok, Titikorn Chunchai, Sasiwan Kerdphoo, Thidarat Jaiwongkam, Busarin Arunsak, Natthaphat Siri-Angkul, Sirawit Sriwichaiin, Nipon Chattipakorn, Siriporn C. Chattipakorn; Endocrinol Metab. 2022;37(4):630-640. Published online August 5, 2022; DOI: https://doi.org/10.3803/EnM.2022.1430

5,927 View
136 Download
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Abstract PDF Supplementary Material PubReader ePub

Background
High cardiorespiratory fitness (CRF) protects against age-related diseases. However, the mechanisms mediating the protective effect of high intrinsic CRF against metabolic, cardiac, and brain impairments in non-obese versus obese conditions remain incompletely understood. We aimed to identify the mechanisms through which high intrinsic CRF protects against metabolic, cardiac, and brain impairments in non-obese versus obese untrained rats.
Methods
Seven-week-old male Wistar rats were divided into two groups (n=8 per group) to receive either a normal diet or a highfat diet (HFD). At weeks 12 and 28, CRF, carbohydrate and fatty acid oxidation, cardiac function, and metabolic parameters were evaluated. At week 28, behavior tests were performed. At the end of week 28, rats were euthanized to collect heart and brain samples for molecular studies.
Results
The obese rats exhibited higher values for aging-related parameters than the non-obese rats, indicating that they experienced obesity-induced premature aging. High baseline CRF levels were positively correlated with several favorable metabolic, cardiac, and brain parameters at follow-up. Specifically, the protective effects of high CRF against metabolic, cardiac, and brain impairments were mediated by the modulation of body weight and composition, the lipid profile, substrate oxidation, mitochondrial function, insulin signaling, autophagy, apoptosis, inflammation, oxidative stress, cardiac function, neurogenesis, blood-brain barrier, synaptic function, accumulation of Alzheimer’s disease-related proteins, and cognition. Interestingly, this effect was more obvious in HFD-fed rats.
Conclusion
The protective effect of high CRF is mediated by the modulation of several mechanisms. These effects exhibit greater efficacy under conditions of obesity-induced premature aging.

Citations

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Associations that Cardiorespiratory Fitness and Body Mass Index Loss Have with Deficit Accumulation Frailty
KAYLONI OLSON, DENISE K. HOUSTON, JOHNATHAN ROSS, RENA R. WING, FELICIA R. SIMPSON, AMBARISH PANDEY, MICHAEL P. WALKUP, MIA YANG, MARK A. ESPELAND
Medicine & Science in Sports & Exercise.2024; 56(4): 717. CrossRef
Interplay between obesity and aging on myocardial geometry and function: Role of leptin-STAT3-stress signaling
Wei Jin, Fei Tu, Feng Dong, Qinqin Deng, Miyesaier Abudureyimu, Wei Yu, Guo-jun Cai, Jian-ming Pei, Zhaohui Pei, Jun Ren
Biochimica et Biophysica Acta (BBA) - General Subjects.2023; 1867(2): 130281. CrossRef
Epidemiological, mechanistic, and practical bases for assessment of cardiorespiratory fitness and muscle status in adults in healthcare settings
Jaime A. Gallo-Villegas, Juan C. Calderón
European Journal of Applied Physiology.2023; 123(5): 945. CrossRef

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