Endocrinology and Metabolism

Original Articles

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.

Citations

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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;[Epub] 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
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
Nutrients.2022; 14(15): 3039. 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

Diabetes, Obesity and Metabolism
Short-Chain Fatty Acids Attenuate Renal Fibrosis and Enhance Autophagy of Renal Tubular Cells in Diabetic Mice Through the HDAC2/ULK1 Axis: Xiaoying Ma, Qiong Wang; Endocrinol Metab. 2022;37(3):432-443. Published online May 16, 2022; DOI: https://doi.org/10.3803/EnM.2021.1336

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Background
This study investigated the effect of short-chain fatty acids (SCFAs) on diabetes in a mouse model.
Methods
Autophagy in Akita mice and streptozocin (STZ)-induced diabetic C57BL/6 mice was determined by Western blots and immunohistochemistry (IHC). Western blots, IHC, hematoxylin and eosin staining, Masson staining, periodic acid-Schiff staining, and picrosirius red staining were conducted to detect whether autophagy and renal function improved in Akita mice and STZ-induced diabetic C57BL/6 mice after treatment of SCFAs. Western blots, IHC, and chromatin immunoprecipitation were performed to determine whether SCFAs affected diabetic mice via the histone deacetylase (HDAC2)/unc-51 like autophagy activating kinase 1 (ULK1) axis. Diabetic mice with kidney-specific knockout of HDAC2 were constructed, and IHC, Masson staining, and Western blots were carried out to detect whether the deletion of endogenous HDAC2 contributed to the improvement of autophagy and renal fibrosis in diabetic mice.
Results
Reduced autophagy and severe fibrosis were observed in Akita mice and STZ-induced diabetic C57BL/6 mice. Increased autophagy and reduced renal cell fibrosis were found in SCFA-treated Akita diabetic mice and STZ-induced diabetic C57BL/6 mice. Diabetic mice treated with SCFAs had lower HDAC2 expression and more enriched binding of ULK1 promoter sequences to H3K27Ac. Endogenous knockout of HDAC2 caused enhanced autophagy and decreased renal fibrosis in diabetic mice treated with SCFAs.
Conclusion
SCFAs enhanced autophagy of renal tubular cells and attenuated renal fibrosis in diabetic mice through the HDAC2/ULK1 axis.

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NSD1 supports cell growth and regulates autophagy in HPV-negative head and neck squamous cell carcinoma
Iuliia Topchu, Igor Bychkov, Demirkan Gursel, Petr Makhov, Yanis Boumber
Cell Death Discovery.2024;[Epub] CrossRef
Dietary fiber intake and its association with diabetic kidney disease in American adults with diabetes: A cross-sectional study
Xin-Hua Jia, Sheng-Yan Wang, Ai-Qin Sun
World Journal of Diabetes.2024; 15(3): 475. CrossRef
Epigenetic and post-translational modifications in autophagy: biological functions and therapeutic targets
Feng Shu, Han Xiao, Qiu-Nuo Li, Xiao-Shuai Ren, Zhi-Gang Liu, Bo-Wen Hu, Hong-Sheng Wang, Hao Wang, Guan-Min Jiang
Signal Transduction and Targeted Therapy.2023;[Epub] CrossRef
Mechanisms of Blood–Brain Barrier Protection by Microbiota-Derived Short-Chain Fatty Acids
Ekaterina Fock, Rimma Parnova
Cells.2023; 12(4): 657. CrossRef
The Role of Histone Modifications in the Pathogenesis of Diabetic Kidney Disease
Christodoula Kourtidou, Konstantinos Tziomalos
International Journal of Molecular Sciences.2023; 24(6): 6007. CrossRef
Mechanism of histone deacetylase HDAC2 in FOXO3-mediated trophoblast pyroptosis in preeclampsia
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Macrophage polarization induces endothelium-to-myofibroblast transition in chronic allograft dysfunction
Zeping Gui, Xiang Zhang, Qianguang Han, Zhou Hang, Ruoyun Tan, Min Gu, Zijie Wang
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KYesoda Aniyan, KrithikaChandrasekar Lakshmi, Anuradha Ganesan
Dental Research Journal.2023; 20(1): 73. CrossRef
Luteolin alleviates renal ischemia-reperfusion injury in streptozotocin induced diabetic rats by inhibiting metalloenzymes expression
Rakesh B. Daude, Jigna S. Shah
Current Issues in Pharmacy and Medical Sciences.2023; 36(4): 199. CrossRef
Molecular mechanisms of histone deacetylases and inhibitors in renal fibrosis progression
Jiayu Wang, Jiaxing Li, Xin Zhang, Min Zhang, Xiaopeng Hu, Hang Yin
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Sacubitril/Valsartan contributes to improving the diabetic kidney disease and regulating the gut microbiota in mice
Peipei Wang, Ruixue Guo, Xiwen Bai, Wen Cui, Yiding Zhang, Huangmin Li, Jin Shang, Zhanzheng Zhao
Frontiers in Endocrinology.2022;[Epub] CrossRef
Recent advances and potentiality of postbiotics in the food industry: Composition, inactivation methods, current applications in metabolic syndrome, and future trends
Yujie Zhong, Tao Wang, Ruilin Luo, Jiayu Liu, Ruyi Jin, Xiaoli Peng
Critical Reviews in Food Science and Nutrition.2022; : 1. 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.

Citations

Citations to this article as recorded by

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
Association between nonalcoholic fatty liver disease and left ventricular diastolic dysfunction: A 7-year retrospective cohort study of 3,496 adults using serial echocardiography
Gyuri Kim, Tae Yang Yu, Jae Hwan Jee, Ji Cheol Bae, Mira Kang, Jae Hyeon Kim
Diabetes & Metabolism.2024; : 101534. CrossRef
Factors Associated with Liver Fibrosis in Chinese Patients with Type 2 Diabetes Mellitus and Non-Alcoholic Fatty Liver Disease
Yu Luo, Cuiyu Wang, Tian Zhang, Xiaoyu He, Jianan Hao, Andong Shen, Hang Zhao, Shuchun Chen, Luping Ren
International Journal of General Medicine.2023; Volume 16: 293. CrossRef
Impact of COVID-19 Lockdown on Non-Alcoholic Fatty Liver Disease and Insulin Resistance in Adults: A before and after Pandemic Lockdown Longitudinal Study
Ángel Arturo López-González, Bárbara Altisench Jané, Luis Masmiquel Comas, Sebastiana Arroyo Bote, Hilda María González San Miguel, José Ignacio Ramírez Manent
Nutrients.2022; 14(14): 2795. 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
Nutrients.2022; 14(15): 3039. CrossRef
Machine learning models including insulin resistance indexes for predicting liver stiffness in United States population: Data from NHANES
Kexing Han, Kexuan Tan, Jiapei Shen, Yuting Gu, Zilong Wang, Jiayu He, Luyang Kang, Weijie Sun, Long Gao, Yufeng Gao
Frontiers in Public Health.2022;[Epub] CrossRef
The crosstalk between insulin resistance and nonalcoholic fatty liver disease/metabolic dysfunction-associated fatty liver disease: a culprit or a consequence?
Dae-Jeong Koo, Won-Young Lee
Cardiovascular Prevention and Pharmacotherapy.2022; 4(4): 132. CrossRef

Endocrine Research
Suppression of Fibrotic Reactions of Chitosan-Alginate Microcapsules Containing Porcine Islets by Dexamethasone Surface Coating: Min Jung Kim, Heon-Seok Park, Ji-Won Kim, Eun-Young Lee, Marie Rhee, Young-Hye You, Gilson Khang, Chung-Gyu Park, Kun-Ho Yoon; Endocrinol Metab. 2021;36(1):146-156. Published online February 24, 2021; DOI: https://doi.org/10.3803/EnM.2021.879

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Background
The microencapsulation is an ideal solution to overcome immune rejection without immunosuppressive treatment. Poor biocompatibility and small molecular antigens secreted from encapsulated islets induce fibrosis infiltration. Therefore, the aims of this study were to improve the biocompatibility of microcapsules by dexamethasone coating and to verify its effect after xenogeneic transplantation in a streptozotocin-induced diabetes mice.
Methods
Dexamethasone 21-phosphate (Dexa) was dissolved in 1% chitosan and was cross-linked with the alginate microcapsule surface. Insulin secretion and viability assays were performed 14 days after microencapsulation. Dexa-containing chitosan-coated alginate (Dexa-chitosan) or alginate microencapsulated porcine islets were transplanted into diabetic mice. The fibrosis infiltration score was calculated from the harvested microcapsules. The harvested microcapsules were stained with trichrome and for insulin and macrophages.
Results
No significant differences in glucose-stimulated insulin secretion and islet viability were noted among naked, alginate, and Dexa-chitosan microencapsulated islets. After transplantation of microencapsulated porcine islets, nonfasting blood glucose were normalized in both the Dexa-chitosan and alginate groups until 231 days. The average glucose after transplantation were lower in the Dexa-chitosan group than the alginate group. Pericapsular fibrosis and inflammatory cell infiltration of microcapsules were significantly reduced in Dexa-chitosan compared with alginate microcapsules. Dithizone and insulin were positive in Dexa-chitosan capsules. Although fibrosis and macrophage infiltration was noted on the surface, some alginate microcapsules were stained with insulin.
Conclusion
Dexa coating on microcapsules significantly suppressed the fibrotic reaction on the capsule surface after transplantation of xenogenic islets containing microcapsules without any harmful effects on the function and survival of the islets.

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Zahra Hosseinzadeh, Iran Alemzadeh, Manouchehr Vossoughi
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A Case for Material Stiffness as a Design Parameter in Encapsulated Islet Transplantation
Courtney D. Johnson, Helim Aranda-Espinoza, John P. Fisher
Tissue Engineering Part B: Reviews.2023; 29(4): 334. CrossRef
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Journal of Pharmaceutical Investigation.2023; 53(5): 601. CrossRef
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Jesus Paez-Mayorga, Izeia Lukin, Dwaine Emerich, Paul de Vos, Gorka Orive, Alessandro Grattoni
Trends in Pharmacological Sciences.2022; 43(3): 221. CrossRef
Layer-by-Layer Cell Encapsulation for Drug Delivery: The History, Technique Basis, and Applications
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β cell replacement therapy for the cure of diabetes
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Modern pancreatic islet encapsulation technologies for the treatment of type 1 diabetes
P. S. Ermakova, E. I. Cherkasova, N. A. Lenshina, A. N. Konev, M. A. Batenkin, S. A. Chesnokov, D. M. Kuchin, E. V. Zagainova, V. E. Zagainov, A. V. Kashina
Russian Journal of Transplantology and Artificial Organs.2021; 23(4): 95. CrossRef

Clinical Study
Development of a Non-Invasive Liver Fibrosis Score Based on Transient Elastography for Risk Stratification in Patients with Type 2 Diabetes: Chi-Ho Lee, Wai-Kay Seto, Kelly Ieong, David T.W. Lui, Carol H.Y. Fong, Helen Y. Wan, Wing-Sun Chow, Yu-Cho Woo, Man-Fung Yuen, Karen S.L. Lam; Endocrinol Metab. 2021;36(1):134-145. Published online February 24, 2021; DOI: https://doi.org/10.3803/EnM.2020.887

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Background
In non-alcoholic fatty liver disease (NAFLD), transient elastography (TE) is an accurate non-invasive method to identify patients at risk of advanced fibrosis (AF). We developed a diabetes-specific, non-invasive liver fibrosis score based on TE to facilitate AF risk stratification, especially for use in diabetes clinics where TE is not readily available.
Methods
Seven hundred sixty-six adults with type 2 diabetes and NAFLD were recruited and randomly divided into a training set (n=534) for the development of diabetes fibrosis score (DFS), and a testing set (n=232) for internal validation. DFS identified patients with AF on TE, defined as liver stiffness (LS) ≥9.6 kPa, based on a clinical model comprising significant determinants of LS with the lowest Akaike information criteria. The performance of DFS was compared with conventional liver fibrosis scores (NFS, FIB-4, and APRI), using area under the receiver operating characteristic curve (AUROC), sensitivity, specificity, positive and negative predictive values (NPV).
Results
DFS comprised body mass index, platelet, aspartate aminotransferase, high-density lipoprotein cholesterol, and albuminuria, five routine measurements in standard diabetes care. Derived low and high DFS cut-offs were 0.1 and 0.3, with 90% sensitivity and 90% specificity, respectively. Both cut-offs provided better NPVs of >90% than conventional fibrosis scores. The AUROC of DFS for AF on TE was also higher (P<0.01) than the conventional fibrosis scores, being 0.85 and 0.81 in the training and testing sets, respectively.
Conclusion
Compared to conventional fibrosis scores, DFS, with a high NPV, more accurately identified diabetes patients at-risk of AF, who need further evaluation by hepatologists.

Citations

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Implementation of a liver health check in people with type 2 diabetes
Kushala W M Abeysekera, Luca Valenti, Zobair Younossi, John F Dillon, Alina M Allen, Mazen Noureddin, Mary E Rinella, Frank Tacke, Sven Francque, Pere Ginès, Maja Thiele, Philip N Newsome, Indra Neil Guha, Mohammed Eslam, Jörn M Schattenberg, Saleh A Alqa
The Lancet Gastroenterology & Hepatology.2024; 9(1): 83. CrossRef
Sequential algorithm to stratify liver fibrosis risk in overweight/obese metabolic dysfunction-associated fatty liver disease
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Frontiers in Endocrinology.2023;[Epub] CrossRef
Non-Invasive Measurement of Hepatic Fibrosis by Transient Elastography: A Narrative Review
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Ultrasound-Based Hepatic Elastography in Non-Alcoholic Fatty Liver Disease: Focus on Patients with Type 2 Diabetes
Georgiana-Diana Cazac, Cristina-Mihaela Lăcătușu, Cătălina Mihai, Elena-Daniela Grigorescu, Alina Onofriescu, Bogdan-Mircea Mihai
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Review Article

Obesity and Metabolism
Noninvasive Evaluation of Nonalcoholic Fatty Liver Disease: Dae Ho Lee; Endocrinol Metab. 2020;35(2):243-259. Published online June 24, 2020; DOI: https://doi.org/10.3803/EnM.2020.35.2.243

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Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver diseases and can progress to advanced fibrosis and end-stage liver disease. Thus, intensive research has been performed to develop noninvasive methods for the diagnosis of nonalcoholic steatohepatitis (NASH) and fibrosis. Currently, no single noninvasive tool covers all of the stages of pathologies and conditions of NAFLD, and the cost and feasibility of known techniques are also important issues. Blood biomarkers for NAFLD may be useful to select subjects who need ultrasonography (US) screening for NAFLD, and noninvasive tools for assessing fibrosis may be helpful to exclude the probability of significant fibrosis and to predict advanced fibrosis, thus guiding the decision of whether to perform liver biopsy in patients with NAFLD. Among various methods, magnetic resonance-based methods have been shown to perform better than other methods in assessing steatosis as well as in detecting hepatic fibrosis. Many genetic markers are associated with the development and progression of NAFLD. Further well-designed studies are needed to determine which biomarker panels, imaging studies, genetic marker panels, or combinations thereof perform well for diagnosing NAFLD, differentiating NASH and fibrosis, and following-up NAFLD, respectively.

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Association between nonalcoholic fatty liver disease and left ventricular diastolic dysfunction: A 7-year retrospective cohort study of 3,496 adults using serial echocardiography
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Greater Severity of Steatosis Is Associated with a Higher Risk of Incident Diabetes: A Retrospective Longitudinal Study
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The Impact of Insulin Resistance on Hepatic Fibrosis among United States Adults with Non-Alcoholic Fatty Liver Disease: NHANES 2017 to 2018
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Original Article

Lobeglitazone, a Novel Peroxisome Proliferator-Activated Receptor γ Agonist, Attenuates Renal Fibrosis Caused by Unilateral Ureteral Obstruction in Mice: Kwi-Hyun Bae, Jung Beom Seo, Yun-A Jung, Hye-Young Seo, Sun Hee Kang, Hui-Jeon Jeon, Jae Man Lee, Sungwoo Lee, Jung-Guk Kim, In-Kyu Lee, Gwon-Soo Jung, Keun-Gyu Park; Endocrinol Metab. 2017;32(1):115-123. Published online February 28, 2017; DOI: https://doi.org/10.3803/EnM.2017.32.1.115

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Abstract PDF PubReader

Background

Renal tubulointerstitial fibrosis is a common feature of the final stage of nearly all cause types of chronic kidney disease. Although classic peroxisome proliferator-activated receptor γ (PPARγ) agonists have a protective effect on diabetic nephropathy, much less is known about their direct effects in renal fibrosis. This study aimed to investigate possible beneficial effects of lobeglitazone, a novel PPARγ agonist, on renal fibrosis in mice.

Methods

We examined the effects of lobeglitazone on renal tubulointerstitial fibrosis in unilateral ureteral obstruction (UUO) induced renal fibrosis mice. We further defined the role of lobeglitazone on transforming growth factor (TGF)-signaling pathways in renal tubulointerstitial fibrosis through in vivo and in vitro study.

Results

Through hematoxylin/eosin and sirius red staining, we observed that lobeglitazone effectively attenuates UUO-induced renal atrophy and fibrosis. Immunohistochemical analysis in conjunction with quantitative reverse transcription polymerase chain reaction and Western blot analysis revealed that lobeglitazone treatment inhibited UUO-induced upregulation of renal Smad-3 phosphorylation, α-smooth muscle actin, plasminogen activator inhibitor 1, and type 1 collagen. In vitro experiments with rat mesangial cells and NRK-49F renal fibroblast cells suggested that the effects of lobeglitazone on UUO-induced renal fibrosis are mediated by inhibition of the TGF-β/Smad signaling pathway.

Conclusion

The present study demonstrates that lobeglitazone has a protective effect on UUO-induced renal fibrosis, suggesting that its clinical applications could extend to the treatment of non-diabetic origin renal disease.

Citations

Citations to this article as recorded by

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Yuan-yuan Chen, Xiao-guang Chen, Sen Zhang
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Effects of Lobeglitazone, a Novel Thiazolidinedione, on Bone Mineral Density in Patients with Type 2 Diabetes Mellitus over 52 Weeks
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Case Report

A Case of Idiopathic Myelofibrosis Associated with Acromegaly Patient.: Jun Young Song, Pyoung Rak Choi, Hong Jun You, Seong Hoon Shin, Yu Ri Kim, Young Sik Choi, Yo Han Park, Mi Hyang Kim, Bong Kwon Chun, Young Duk Joh; J Korean Endocr Soc. 2006;21(4):328-332. Published online August 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.4.328

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17 Download

Abstract PDF: Acromegaly is a chronic condition resulting from the excessive secretion of growth hormone and insulin like growth factor 1, generally from pituitary adenoma. Although there have been several reports suggesting the possible association of hematologic malignancies with acromegaly, myelofibrosis with acromegaly is very rare. Here we report 54-year-old male patient with myelofibrosis accompanied with acromegaly. We treated this patient with low dose thalidomide (50 mg/day) and prednisone (30 mg/day). We reported this case with literature review.

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