Endocrinology and Metabolism

Original Articles

Diabetes, obesity and metabolism
Phloretin Ameliorates Succinate-Induced Liver Fibrosis by Regulating Hepatic Stellate Cells: Cong Thuc Le, Giang Nguyen, So Young Park, Hanh Nguyen Dong, Yun Kyung Cho, Jae-Ho Lee, Seung-Soon Im, Dae-Hee Choi, Eun-Hee Cho; Endocrinol Metab. 2023;38(4):395-405. Published online August 3, 2023; DOI: https://doi.org/10.3803/EnM.2023.1661

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Abstract PDF PubReader ePub: Background
Hepatic stellate cells (HSCs) are the major cells which play a pivotal role in liver fibrosis. During injury, extracellular stimulators can induce HSCs transdifferentiated into active form. Phloretin showed its ability to protect the liver from injury, so in this research we would like to investigate the effect of phloretin on succinate-induced HSCs activation in vitro and liver fibrosis in vivo study.
Methods
In in vitro, succinate was used to induce HSCs activation, and then the effect of phloretin on activated HSCs was examined. In in vivo, succinate was used to generated liver fibrosis in mouse and phloretin co-treated to check its protection on the liver.
Results
Phloretin can reduce the increase of fibrogenic markers and inhibits the proliferation, migration, and contraction caused by succinate in in vitro experiments. Moreover, an upregulation of proteins associated with aerobic glycolysis occurred during the activation of HSCs, which was attenuated by phloretin treatment. In in vivo experiments, intraperitoneal injection of phloretin decreased expression of fibrotic and glycolytic markers in the livers of mice with sodium succinate diet-induced liver fibrosis. These results suggest that aerobic glycolysis plays critical role in activation of HSCs and succinate can induce liver fibrosis in mice, whereas phloretin has therapeutic potential for treating hepatic fibrosis.
Conclusion
Intraperitoneal injection of phloretin attenuated succinate-induced hepatic fibrosis and alleviates the succinate-induced HSCs activation.

Diabetes, Obesity and Metabolism
Gemigliptin Alleviates Succinate-Induced Hepatic Stellate Cell Activation by Ameliorating Mitochondrial Dysfunction: Giang Nguyen, So Young Park, Dinh Vinh Do, Dae-Hee Choi, Eun-Hee Cho; Endocrinol Metab. 2022;37(6):918-928. Published online November 15, 2022; DOI: https://doi.org/10.3803/EnM.2022.1530

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Background
Dipeptidyl peptidase-4 inhibitors (DPP-4Is) are used clinically as oral antidiabetic agents. Although DPP-4Is are known to ameliorate liver fibrosis, the protective mechanism of DPP-4Is in liver fibrosis remains obscure. In this study, gemigliptin was used to investigate the potential of DPP-4Is to alleviate the progression of liver fibrosis.
Methods
To clarify the effects and mechanisms of gemigliptin, we conducted various experiments in LX-2 cells (immortalized human hepatic stellate cells [HSCs], the principal effectors of hepatic fibrogenesis), which were activated by succinate and exhibited elevated expression of α-smooth muscle actin, collagen type 1, and pro-inflammatory cytokines and increased cell proliferation. In vivo, we examined the effects and mechanisms of gemigliptin on a high-fat, high-cholesterol–induced mouse model of nonalcoholic steatohepatitis (NASH).
Results
Gemigliptin decreased the expression of fibrogenesis markers and reduced the abnormal proliferation of HSCs. In addition, gemigliptin reduced the succinate-induced production of mitochondrial reactive oxygen species (ROS), intracellular ROS, and mitochondrial fission in HSCs. Furthermore, in the mouse model of NASH-induced liver fibrosis, gemigliptin alleviated both liver fibrosis and mitochondrial dysfunction.
Conclusion
Gemigliptin protected against HSC activation and liver fibrosis by alleviating mitochondrial dysfunction and ROS production, indicating its potential as a strategy for preventing the development of liver disease.

Citations

Citations to this article as recorded by

Improvement effect of gemigliptin on salivary gland dysfunction in exogenous methylglyoxal-injected rats
Woo Kwon Jung, Su-Bin Park, Hwa Young Yu, Junghyun Kim
Heliyon.2024; 10(8): e29362. CrossRef
Gemigliptin, a DPP4 inhibitor, ameliorates nonalcoholic steatohepatitis through AMP-activated protein kinase-independent and ULK1-mediated autophagy
Youngmi Song, Hyekyung Yang, Juhee Kim, Yoonjin Lee, Sung-Ho Kim, In-Gu Do, Cheol-Young Park
Molecular Metabolism.2023; 78: 101806. CrossRef
DPP-4 Inhibitor in Type 2 Diabetes Mellitus Patient with Non-Alcoholic Fatty Liver Disease: Achieving Two Goals at Once?
Ji Cheol Bae
Endocrinology and Metabolism.2022; 37(6): 858. CrossRef

Endocrine Research
Irisin Regulates the Functions of Hepatic Stellate Cells: Hanh Nguyen Dong, So Young Park, Cong Thuc Le, Dae-Hee Choi, Eun-Hee Cho; Endocrinol Metab. 2020;35(3):647-655. Published online September 22, 2020; DOI: https://doi.org/10.3803/EnM.2020.658

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180 Download
11 Web of Science
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Abstract PDF PubReader ePub

Background
Hepatic stellate cells (HSCs) are known to play a fundamental role in the progression of liver fibrosis. Once HSCs are activated, they are involved in proliferation, migration, and contractility which are characteristics of liver fibrogenesis. Recent studies have shown that irisin, a myokine secreted during physical exercise, has a protective effect in various metabolic diseases, especially in renal fibrosis. However, whether irisin is involved in HSC activation and other processes associated with liver fibrosis has not yet been investigated. In this study, we reveal the role of irisin in HSC activation as well as in proliferation, migration, and contractile properties of HSCs in vitro.
Methods
LX-2 cells, immortalized human HSCs, were treated with transforming growth factor beta 1 (TGF-β1), a core regulator of HSC fibrosis, with or without irisin, and markers of the aforementioned processes were analyzed. Further, an inflammatory response was stimulated with TGF-β1 and lipopolysaccharide (LPS) in combination with irisin and the expression of cytokines was measured.
Results
Recombinant irisin significantly suppressed the expression of TGF-β1-stimulated fibrosis markers including alpha-smooth muscle actin and collagen type 1 alpha 1 and prevented the TGF-β1-induced proliferation, migration, and contractility of LX-2 cells. Additionally, irisin ameliorated the production of interleukin-6 (IL-6) and IL-1β induced by TGF-β1 and LPS treatments.
Conclusion
These findings suggested that irisin potently improved the progression of hepatic fibrosis by regulating HSC activation, proliferation, migration, contractility, and HSC-mediated production of inflammatory cytokine.

Citations

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Potential role of irisin in digestive system diseases
Yueming Zhang, Linxian Zhao, Huan Gao, Jinghui Zhai, Yanqing Song
Biomedicine & Pharmacotherapy.2023; 166: 115347. CrossRef
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Hongna Dong, Xuejiao Lv, Peng Gao, Yuqiu Hao
Frontiers in Pharmacology.2023;[Epub] CrossRef
Stem bark of Fraxinus rhynchophylla ameliorates the severity of pancreatic fibrosis by regulating the TGF-β/Smad signaling pathway
Ji-Won Choi, Joon Yeon Shin, Ziqi Zhou, Dong-Uk Kim, Bitna Kweon, Hyuncheol Oh, Youn-Chul Kim, Ho-Joon Song, Gi-Sang Bae, Sung-Joo Park
Journal of Investigative Medicine.2022; 70(5): 1285. CrossRef
Circadian rhythms and cancers: the intrinsic links and therapeutic potentials
Li Zhou, Zhe Zhang, Edouard Nice, Canhua Huang, Wei Zhang, Yong Tang
Journal of Hematology & Oncology.2022;[Epub] CrossRef
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The potential role of FNDC5/irisin in various liver diseases: awakening the sleeping beauties
Xiaoyu Wang, Lihong Mao, Chaoqun Li, Yangyang Hui, Zihan Yu, Mingyu Sun, Yifan Li, Gaoyue Guo, Wanting Yang, Binxin Cui, Xiaofei Fan, Chao Sun
Expert Reviews in Molecular Medicine.2022;[Epub] CrossRef
The Effects of Irisin on the Interaction between Hepatic Stellate Cell and Macrophage in Liver Fibrosis
Dinh Vinh Do, So Young Park, Giang Thi Nguyen, Dae Hee Choi, Eun-Hee Cho
Endocrinology and Metabolism.2022; 37(4): 620. CrossRef
Hepatic Steatosis Contributes to the Development of Muscle Atrophy via Inter-Organ Crosstalk
Kenneth Pasmans, Michiel E. Adriaens, Peter Olinga, Ramon Langen, Sander S. Rensen, Frank G. Schaap, Steven W. M. Olde Damink, Florian Caiment, Luc J. C. van Loon, Ellen E. Blaak, Ruth C. R. Meex
Frontiers in Endocrinology.2021;[Epub] CrossRef
Physiopathology of Lifestyle Interventions in Non-Alcoholic Fatty Liver Disease (NAFLD)
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