Endocrinology and Metabolism

Original Articles

Diabetes, obesity and metabolism
TAZ WW Domain-Mediated Regulation of Gluconeogenesis and Tumorigenesis in Hepatocellular Carcinoma through Interaction with the Glucocorticoid Receptor: Hongxiang Huang, Jinhong Chen, Xingyu Tao, Peiyuan Zhong, Yanqiu Meng, Sujuan Peng, Wanying Luo, Zhiyong He, Shuai Luo, Xie Zhu, Zhihui Lu, Li Chen, Yangyang Liu; Endocrinol Metab. 2026;41(2):267-287. Published online February 10, 2026; DOI: https://doi.org/10.3803/EnM.2025.2471

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Abstract PDF Supplementary Material PubReader ePub: Background
Hepatocellular carcinoma (HCC) is a leading cause of cancer mortality, characterized by poor prognosis due to its high proliferative and invasive potential. Tumor metabolic reprogramming, particularly involving glucose metabolism, is essential for tumor survival. This study investigates the role of the Hippo pathway effector transcriptional co-activator with PDZ-binding motif (TAZ) in regulating gluconeogenesis and promoting tumorigenesis in HCC.
Methods
TAZ expression in HCC was analyzed using The Cancer Genome Atlas data and validated in clinical samples and cell lines. TAZ was overexpressed or silenced in HCC cell lines to evaluate its effects on cell proliferation, apoptosis, migration, and invasion. The expression and prognostic relevance of the gluconeogenesis-related genes phosphoenolpyruvate carboxykinase 1 (PCK1) and glucose-6-phosphatase (G6PC) were examined, along with their correlation with TAZ expression. Tumor growth was assessed in nude mice. Interactions between TAZ and the glucocorticoid receptor (GR) were investigated using co-immunoprecipitation, immunofluorescence, and chromatin immunoprecipitation assays.
Results
TAZ was significantly upregulated in HCC tissues and cell lines. TAZ overexpression enhanced proliferation, reduced apoptosis, and promoted migration and invasion. In contrast, PCK1 and G6PC were downregulated in HCC and showed a negative correlation with TAZ expression.
Conclusion
TAZ modulates gluconeogenesis and accelerates tumor growth, whereas its knockdown attenuates tumor progression. TAZ interacts with GR, suppressing its transcriptional activity on gluconeogenic gene promoters.

Diabetes, obesity and metabolism Big Data Articles (National Health Insurance Service Database)
Impact of Glucose Metabolism Status on the Association between Apolipoprotein A-I and Ischemic Risk in Patients with Coronary Artery Disease: A Large-Sample Cohort Study: Kailun Yan, Jiawen Li, Kexin Zhang, Menglu Liu, Pei Zhu, Xiaofang Tang, Deshan Yuan, Yuejin Yang, Runlin Gao, Jinqing Yuan, Xueyan Zhao; Endocrinol Metab. 2025;40(6):904-915. Published online November 7, 2025; DOI: https://doi.org/10.3803/EnM.2025.2407

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Abstract PDF Supplementary Material PubReader ePub: Background
Apolipoprotein A-I (ApoA-I) is a key cardioprotective lipoprotein. Nevertheless, it remains unclear how ApoA-I relates to ischemic risk across glucose metabolism statuses in patients with coronary artery disease (CAD). This study investigated whether glucose metabolism status influences the association between ApoA-I and ischemic risk in CAD patients.
Methods
This cohort study included 10,724 consecutive CAD patients undergoing percutaneous coronary intervention, who were classified into diabetes mellitus (DM), pre-DM, and normal glucose regulation (NGR) groups. The primary clinical endpoint was major adverse cardiac and cerebrovascular event (MACCE), defined as a composite of all-cause death, myocardial infarction, revascularization, and stroke.
Results
Of the 10,232 patients ultimately included, 2,139 (20.9%) experienced MACCE over 5 years. A significant interaction was observed between ApoA-I levels and glucose metabolism status (P for interaction=0.041). In the DM group, an L-shaped association between ApoA-I and MACCE was found, with lower ApoA-I levels linked to a higher risk of MACCE (P for non-linearity= 0.044). Multivariate Cox regression analysis showed that patients in the lowest quintile of ApoA-I had a 1.327-fold increased risk of MACCE compared to those at the lowest risk (hazard ratio, 1.327; 95% confidence interval, 1.097 to 1.604). However, no significant association was observed in the pre-DM or NGR groups (both P>0.05).
Conclusion
This large-scale, 5-year follow-up study is the first to demonstrate that lower ApoA-I levels are associated with increased MACCE risk in CAD patients with DM, highlighting the potential value of ApoA-I in risk stratification and as a therapeutic target.

Review Article

Diabetes, obesity and metabolism
Regulation of Energy and Glucose Homeostasis by the Nucleus of the Solitary Tract and the Area Postrema: Kyla Bruce, Ameth N. Garrido, Song-Yang Zhang, Tony K.T. Lam; Endocrinol Metab. 2024;39(4):559-568. Published online August 1, 2024; DOI: https://doi.org/10.3803/EnM.2024.2025

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The central nervous system regulates feeding, weight and glucose homeostasis in rodents and humans, but the site-specific mechanisms remain unclear. The dorsal vagal complex in the brainstem that contains the nucleus of the solitary tract (NTS) and area postrema (AP) emerges as a regulatory center that impacts energy and glucose balance by monitoring hormonal and nutrient changes. However, the specific mechanistic metabolic roles of the NTS and AP remain elusive. This mini-review highlights methods to study their distinct roles and recent findings on their metabolic differences and similarities of growth differentiation factor 15 (GDF15) action and glucose sensing in the NTS and AP. In summary, future research aims to characterize hormonal and glucose sensing mechanisms in the AP and/or NTS carries potential to unveil novel targets that lower weight and glucose levels in obesity and diabetes.

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Namgok Lecture 2023

Diabetes, obesity and metabolism
Hypothalamic AMP-Activated Protein Kinase as a Whole-Body Energy Sensor and Regulator: Se Hee Min, Do Kyeong Song, Chan Hee Lee, Eun Roh, Min-Seon Kim; Endocrinol Metab. 2024;39(1):1-11. Published online February 14, 2024; DOI: https://doi.org/10.3803/EnM.2024.1922

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5´-Adenosine monophosphate (AMP)-activated protein kinase (AMPK), a cellular energy sensor, is an essential enzyme that helps cells maintain stable energy levels during metabolic stress. The hypothalamus is pivotal in regulating energy balance within the body. Certain neurons in the hypothalamus are sensitive to fluctuations in food availability and energy stores, triggering adaptive responses to preserve systemic energy equilibrium. AMPK, expressed in these hypothalamic neurons, is instrumental in these regulatory processes. Hypothalamic AMPK activity is modulated by key metabolic hormones. Anorexigenic hormones, including leptin, insulin, and glucagon-like peptide 1, suppress hypothalamic AMPK activity, whereas the hunger hormone ghrelin activates it. These hormonal influences on hypothalamic AMPK activity are central to their roles in controlling food consumption and energy expenditure. Additionally, hypothalamic AMPK activity responds to variations in glucose concentrations. It becomes active during hypoglycemia but is deactivated when glucose is introduced directly into the hypothalamus. These shifts in AMPK activity within hypothalamic neurons are critical for maintaining glucose balance. Considering the vital function of hypothalamic AMPK in the regulation of overall energy and glucose balance, developing chemical agents that target the hypothalamus to modulate AMPK activity presents a promising therapeutic approach for metabolic conditions such as obesity and type 2 diabetes mellitus.

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Review Article

Diabetes, Obesity and Metabolism
Roles of Protein Arginine Methyltransferases in the Control of Glucose Metabolism: Hye-Sook Han, Dahee Choi, Seri Choi, Seung-Hoi Koo; Endocrinol Metab. 2014;29(4):435-440. Published online December 29, 2014; DOI: https://doi.org/10.3803/EnM.2014.29.4.435

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Abstract PDF PubReader

Glucose homeostasis is tightly controlled by the regulation of glucose production in the liver and glucose uptake into peripheral tissues, such as skeletal muscle and adipose tissue. Under prolonged fasting, hepatic gluconeogenesis is mainly responsible for glucose production in the liver, which is essential for tissues, organs, and cells, such as skeletal muscle, the brain, and red blood cells. Hepatic gluconeogenesis is controlled in part by the concerted actions of transcriptional regulators. Fasting signals are relayed by various intracellular enzymes, such as kinases, phosphatases, acetyltransferases, and deacetylases, which affect the transcriptional activity of transcription factors and transcriptional coactivators for gluconeogenic genes. Protein arginine methyltransferases (PRMTs) were recently added to the list of enzymes that are critical for regulating transcription in hepatic gluconeogenesis. In this review, we briefly discuss general aspects of PRMTs in the control of transcription. More specifically, we summarize the roles of four PRMTs: PRMT1, PRMT 4, PRMT 5, and PRMT 6, in the control of hepatic gluconeogenesis through specific regulation of FoxO1- and CREB-dependent transcriptional events.

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Original Article

The Effects of Growth Hormone Tretment on Body Composition and Glucose Metabolism in Adult Hypophysectomized Rats.: Kwan Woo Lee, Hyun Chul Lee, Kap Bum Huh, Yoon Sok Chung, Deok Bae Park, Yup Kang, Hyeon Man Kim, Seoung Oh Yang; J Korean Endocr Soc. 1997;12(1):53-60. Published online January 1, 2001

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Abstract PDF: BACKGROUND
It is well known that growth hormone (GH) stimulates animal growth, but studies on metabolic effects of growth hormone have recently been increasing. The purpose of this study was to clarify the effects of growth hormone treatment on body composition and glucose metabolism in hypophysectomized growth hormone-deficient rats. METHODS: The 20-week-old rnale Sprague-Dawley rats were hypophysectomized and replaced with cortisol and thyroxine for 8 weeks, then administered with recombinant human growth hormone for 2 weeks. Group 1 consisted of intact controls (n 15), while group 2 consisted of hypophysectomized controls (n 12), and group three consisted of those with GH treatment (n 13). The body weights, body composition, blood glucose levels, plasma insulin-like growth factor-I (IGF-I) levels, euglycemic hyperinsulinemic clamp test, and glycogen synthase activities in gastrocnemius muscle were measured before and after growth hormone treatment. RESULTS: Plasma IGF-I levels in GH-treated group increased to intact control group levels after 2 weeks of GH treatment. There were significant changes in body composition after the treatment (fat mass significantly decreased and lean body mass significantly increased). There were no changes in glucose metabolism in peripheral tissue after 2 weeks of GH treatment. CONCLUSION: Human GH treatment (4 IU/kg/day) in adult hypophysectomized GH-deficient rats changed the body composition, but did not alter the glucose metabolism in peripheral tissue.

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