601
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A single extra copy of Down syndrome critical region 1-4 results in impaired hepatic glucose homeostasis. Mol Metab 2018; 21:82-89. [PMID: 30583978 PMCID: PMC6407364 DOI: 10.1016/j.molmet.2018.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 11/29/2018] [Accepted: 12/03/2018] [Indexed: 01/19/2023] Open
Abstract
Objectives During fasting, hepatic gluconeogenesis is induced to maintain energy homeostasis. Moreover, abnormal dysregulation of hepatic glucose production is commonly observed in type 2 diabetes. However, the signaling components controlling hepatic glucose production to maintain normal glucose levels are not fully understood. Here, we examined the physiological role of Down syndrome critical region 1–4 (DSCR1-4), an endogenous calcineurin signaling inhibitor in the liver that mediates metabolic adaptation to fasting. Methods We assessed the effect of cyclosporine A, an inhibitor of calcineurin signaling on gluconeogenic gene expression in primary hepatocytes. DSCR1-4 expression was examined in diet- and genetically-induced mouse models of obesity. We also investigated the metabolic phenotype of a single extra copy of DSCR1-4 in transgenic mice and how DSCR1-4 regulates glucose homeostasis in the liver. Results Treatment with cyclosporin A increased hepatic glucose production and gluconeogenic gene expression. The expression of DSCR1-4 was induced by refeeding and overexpressed in obese mouse livers. Moreover, transgenic mice with a single extra copy of DSCR1-4 exhibited pyruvate intolerance and impaired glucose homeostasis. Mechanistically, DSCR1-4 overexpression increased phosphorylation of the cAMP response element-binding protein, which led to elevated expression levels of gluconeogenic genes and, thus, enhanced hepatic glucose production during fasting. Conclusion A single extra copy of DSCR1-4 results in dysregulated hepatic glucose homeostasis and pyruvate intolerance. Our findings suggest that nutrient-sensitive DSCR1-4 is a novel target for controlling hepatic gluconeogenesis in diabetes. DSCR1 mRNA and protein levels are increased in livers upon nutrient availability. DSCR1-4 is overexpressed in diet- or genetically induced obesity. DSCR1-4 trisomy mice exhibit impaired glucose homeostasis and pyruvate intolerance. Trisomy of DSCR1-4 leads to increased hepatic glucose production.
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602
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Goedeke L, Bates J, Vatner DF, Perry RJ, Wang T, Ramirez R, Li L, Ellis MW, Zhang D, Wong KE, Beysen C, Cline GW, Ray AS, Shulman GI. Acetyl-CoA Carboxylase Inhibition Reverses NAFLD and Hepatic Insulin Resistance but Promotes Hypertriglyceridemia in Rodents. Hepatology 2018; 68:2197-2211. [PMID: 29790582 PMCID: PMC6251774 DOI: 10.1002/hep.30097] [Citation(s) in RCA: 168] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 04/30/2018] [Indexed: 12/13/2022]
Abstract
Pharmacologic inhibition of acetyl-CoA carboxylase (ACC) enzymes, ACC1 and ACC2, offers an attractive therapeutic strategy for nonalcoholic fatty liver disease (NAFLD) through simultaneous inhibition of fatty acid synthesis and stimulation of fatty acid oxidation. However, the effects of ACC inhibition on hepatic mitochondrial oxidation, anaplerosis, and ketogenesis in vivo are unknown. Here, we evaluated the effect of a liver-directed allosteric inhibitor of ACC1 and ACC2 (Compound 1) on these parameters, as well as glucose and lipid metabolism, in control and diet-induced rodent models of NAFLD. Oral administration of Compound 1 preferentially inhibited ACC enzymatic activity in the liver, reduced hepatic malonyl-CoA levels, and enhanced hepatic ketogenesis by 50%. Furthermore, administration for 6 days to high-fructose-fed rats resulted in a 20% reduction in hepatic de novo lipogenesis. Importantly, long-term treatment (21 days) significantly reduced high-fat sucrose diet-induced hepatic steatosis, protein kinase C epsilon activation, and hepatic insulin resistance. ACCi treatment was associated with a significant increase in plasma triglycerides (approximately 30% to 130%, depending on the length of fasting). ACCi-mediated hypertriglyceridemia could be attributed to approximately a 15% increase in hepatic very low-density lipoprotein production and approximately a 20% reduction in triglyceride clearance by lipoprotein lipase (P ≤ 0.05). At the molecular level, these changes were associated with increases in liver X receptor/sterol response element-binding protein-1 and decreases in peroxisome proliferator-activated receptor-α target activation and could be reversed with fenofibrate co-treatment in a high-fat diet mouse model. Conclusion: Collectively, these studies warrant further investigation into the therapeutic utility of liver-directed ACC inhibition for the treatment of NAFLD and hepatic insulin resistance.
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Affiliation(s)
- Leigh Goedeke
- Department of Internal Medicine, Yale University School of Medicine, New Haven CT, 06520
| | | | - Daniel F. Vatner
- Department of Internal Medicine, Yale University School of Medicine, New Haven CT, 06520
| | - Rachel J. Perry
- Department of Internal Medicine, Yale University School of Medicine, New Haven CT, 06520
| | - Ting Wang
- Gilead Sciences Inc., Foster City CA 94404
| | | | - Li Li
- Gilead Sciences Inc., Foster City CA 94404
| | - Matthew W. Ellis
- Department of Cellular & Molecular Physiology, Yale University School of Medicine, New Haven CT 06520
| | - Dongyan Zhang
- Department of Internal Medicine, Yale University School of Medicine, New Haven CT, 06520
| | | | | | - Gary W. Cline
- Department of Internal Medicine, Yale University School of Medicine, New Haven CT, 06520
| | | | - Gerald I. Shulman
- Department of Internal Medicine, Yale University School of Medicine, New Haven CT, 06520,Department of Cellular & Molecular Physiology, Yale University School of Medicine, New Haven CT 06520,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven CT 06520
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603
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Chi Y, Meng Y, Wang J, Yang W, Wu Z, Li M, Wang D, Gao F, Geng B, Tie L, Zhang W, Yang J. FAM3B (PANDER) functions as a co-activator of FOXO1 to promote gluconeogenesis in hepatocytes. J Cell Mol Med 2018; 23:1746-1758. [PMID: 30488666 PMCID: PMC6378191 DOI: 10.1111/jcmm.14073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/23/2018] [Accepted: 11/12/2018] [Indexed: 12/31/2022] Open
Abstract
FAM3B, also known as PANcreatic DERived factor (PANDER), promotes gluconeogenesis and lipogenesis in hepatocytes. However, the underlying mechanism(s) still remains largely unclear. This study determined the mechanism of PANDER-induced FOXO1 activation in hepatocytes. In mouse livers and cultured hepatocytes, PANDER protein is located in both the cytoplasm and nucleus. Nuclear PANDER distribution was increased in the livers of obese mice. In cultured mouse and human hepatocytes, PANDER was co-localized with FOXO1 in the nucleus. PANDER directly interacted with FOXO1 in mouse and human hepatocytes. PANDER overexpression enhanced PANDER-FOXO1 interaction, and detained FOXO1 in the nucleus upon insulin stimulation in hepatocytes. With the increase in PANDER-FOXO1 interaction, PANDER overexpression upregulated the expression of gluconeogenic genes and promoted gluconeogenesis in both human and mouse hepatocytes. Luciferase reporter assays further revealed that PANDER augmented the transcriptional activity of FOXO1 on gluconeogenic genes. Moreover, PANDER overexpression also interfered the binding of AS1842856, a specific FOXO1 inhibitor, with FOXO1, and impaired its inhibitory effects on gluconeogenic gene expression and gluconeogenesis in hepatocytes. siRNA mediated-silencing of FOXO1 inhibited PANDER-promoted gluconeogenic gene expression and glucose production in hepatocytes. In conclusion, PANDER protein is abundantly present in the nucleus, where it functions as a new co-activator of FOXO1 to induce gluconeogenic gene expression in hepatocytes.
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Affiliation(s)
- Yujing Chi
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Yuhong Meng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Cardiovascular Science of the Ministry of Education, Center for Non-coding RNA Medicine, Peking University Health Science Center, Beijing, China
| | - Junpei Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Cardiovascular Science of the Ministry of Education, Center for Non-coding RNA Medicine, Peking University Health Science Center, Beijing, China
| | - Weili Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Cardiovascular Science of the Ministry of Education, Center for Non-coding RNA Medicine, Peking University Health Science Center, Beijing, China
| | - Zhe Wu
- Department of Gastroenterology, Peking University People's Hospital, Beijing, China
| | - Mei Li
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Di Wang
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Fangfang Gao
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing, China
| | - Bin Geng
- State Key Laboratory of Cardiovascular Disease, Hypertension Center, Fuwai Hospital, CAMS and PUMC, National Center for Cardiovascular Diseases, Beijing, China
| | - Lu Tie
- Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Weiping Zhang
- Department of Pathophysiology, Second Military Medical University, Shanghai, China
| | - Jichun Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Cardiovascular Science of the Ministry of Education, Center for Non-coding RNA Medicine, Peking University Health Science Center, Beijing, China
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604
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Liu GM, Li Q, Zhang PF, Shen SL, Xie WX, Chen B, Wu J, Hu WJ, Huang XY, Peng BG. Restoration of FBP1 suppressed Snail-induced epithelial to mesenchymal transition in hepatocellular carcinoma. Cell Death Dis 2018; 9:1132. [PMID: 30429463 PMCID: PMC6235921 DOI: 10.1038/s41419-018-1165-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 09/26/2018] [Accepted: 10/16/2018] [Indexed: 02/07/2023]
Abstract
Fructose-1,6-bisphosphatase (FBP1), one of the rate-limiting gluconeogenic enzymes, plays critical roles in several cancers and is treated as a tumour suppressor. However, its role in hepatocellular carcinoma (HCC) is unclear. Here, we demonstrated that FBP1 was significantly inhibited during Snail-induced epithelial to mesenchymal transition (EMT) and tissues in HCC. Restoration of FBP1 expression in HCC cancer cells suppressed EMT phenotype, tumour migration and tumour growth induced by Snail overexpression in SMMC-7721 cells. Gene set enrichment analyses revealed significantly enriched terms, including WNT, Notch, ESC, CSR and PDGF, in the group with high Snail and low FBP1 compared with those with low Snail and high FBP1. Low FBP1 expression was significantly correlated with higher AFP level, satellite nodules, portal vein tumour thrombus, and advanced tumour stage. Survival analyses showed that FBP1 was an independent prognostic factor for overall survival and recurrence-free survival. In conclusion, our study revealed a vital role for FBP1 in Snail-induced EMT and prognostic prediction in HCC.
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Affiliation(s)
- Gao-Min Liu
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China.,Department of Hepatobiliary Surgery, Meizhou People's Hospital, No. 34 Huangtang Road, 514031, Meizhou, China
| | - Qiao Li
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China
| | - Peng-Fei Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Shun-Li Shen
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China
| | - Wen-Xuan Xie
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China
| | - Bin Chen
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China
| | - Jian Wu
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China
| | - Wen-Jie Hu
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China
| | - Xiao-Yong Huang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Bao-Gang Peng
- Department of Liver Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Er Road, 510080, Guangzhou, China.
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605
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Rada P, Mosquera A, Muntané J, Ferrandiz F, Rodriguez-Mañas L, de Pablo F, González-Canudas J, Valverde ÁM. Differential effects of metformin glycinate and hydrochloride in glucose production, AMPK phosphorylation and insulin sensitivity in hepatocytes from non-diabetic and diabetic mice. Food Chem Toxicol 2018; 123:470-480. [PMID: 30414960 DOI: 10.1016/j.fct.2018.11.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/10/2018] [Accepted: 11/07/2018] [Indexed: 01/23/2023]
Abstract
The liver is a main target tissue of the biguanide metformin which activates AMP-activated protein kinase (AMPK). We previously reported that administration of metformin glycinate showed a greater decrease of glycated hemoglobin A1c than a placebo in patients with type 2 diabetes mellitus (T2DM). In this study, we compared the effects of metformin hydrochloride, the oral antidiabetic drug of first choice, with those of metformin glycinate in hepatocytes from non-diabetic and diabetic mice and humans. Both formulations were equally potent regard to the reduction of basal and glucagon-induced glucose production and mRNA levels of gluconeogenic enzymes (Pck1 and G6pc) in hepatocytes from C57/Bl6 mice and humans. On the contrary, phosphorylation of AMPK and its substrate acetyl CoA carboxylase (ACC) was faster in hepatocytes treated with metformin glycinate. Likewise, we found stronger reduction in hepatocytes from obese/diabetic db/db mice of glucagon-induced glucose output and more sustained AMPK phosphorylation after treatment with metformin glycinate. Importantly, insulin sensitization regarding phosphorylation of AKT (Ser473) was enhanced in hepatocytes from db/db mice or humans pretreated with metformin glycinate. In conclusion, our data indicate that metformin glycinate may be an alternative therapy against insulin resistance during obesity and/or T2DM.
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Affiliation(s)
- Patricia Rada
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBm) (CSIC/UAM), C/ Arturo Duperier 4, 28029, Madrid, Spain; Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERdem), ISCIII, 28029 Madrid, Spain
| | - Alejandra Mosquera
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBm) (CSIC/UAM), C/ Arturo Duperier 4, 28029, Madrid, Spain
| | - Jordi Muntané
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, 28029 Madrid, Spain; Oncology Surgery, Cell Therapy and Transplant Organs, Institute of Biomedicine of Seville (IBiS)/University Hospital Virgen del Rocio/CSIC/University of Seville, Seville, Spain
| | | | - Leocadio Rodriguez-Mañas
- Department of Geriatrics, Hospital Universitario de Getafe and School of Health Sciences, Universidad Europea de Madrid, 28905 Getafe, Spain
| | - Flora de Pablo
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERdem), ISCIII, 28029 Madrid, Spain; Department of Molecular Biomedicine, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | | | - Ángela M Valverde
- Instituto de Investigaciones Biomédicas Alberto Sols (IIBm) (CSIC/UAM), C/ Arturo Duperier 4, 28029, Madrid, Spain; Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERdem), ISCIII, 28029 Madrid, Spain.
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606
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Al Haj Ahmad RM, Al-Domi HA. Thinking about brain insulin resistance. Diabetes Metab Syndr 2018; 12:1091-1094. [PMID: 29778668 DOI: 10.1016/j.dsx.2018.05.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 05/04/2018] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Dementia and type 2 diabetes mellitus (T2DM) are two of the epidemics of our time; in which insulin resistance (IR) is playing the central role. Epidemiological studies found that different types of dementia development may be promoted by the presence of T2DM. OBJECTIVES We aimed in this review to highlight the role of insulin and the IR in the brain as a pathophysiological factor of dementia development and also to expand our understanding of T2DM as a mediator of IR in the brain and to review the possible mechanisms of action that may explain the association. METHODOLOGY A critical review of the relevant published English articles up to 2018, using PubMed, Google Scholar, Science Direct, ADI, and WHO database was carried out. Keywords were included insulin resistance, T3DM, T2DM, dementia, brain insulin resistance were used. CONCLUSION The rapidly increased prevalence of dementia concurrently with T2DM and obesity need urgent action to illustrate guidelines for prevention, modifying, and treatment based on mechanistic studies.
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Affiliation(s)
- Reem M Al Haj Ahmad
- Department of Nutrition and Food Technology, Faculty of Agriculture, The University of Jordan, Queen Rania Street, Amman 11942, Jordan
| | - Hayder A Al-Domi
- Department of Nutrition and Food Technology, Faculty of Agriculture, The University of Jordan, Queen Rania Street, Amman 11942, Jordan.
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607
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Spradley FT, Smith JA, Alexander BT, Anderson CD. Developmental origins of nonalcoholic fatty liver disease as a risk factor for exaggerated metabolic and cardiovascular-renal disease. Am J Physiol Endocrinol Metab 2018; 315:E795-E814. [PMID: 29509436 PMCID: PMC6293166 DOI: 10.1152/ajpendo.00394.2017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Intrauterine growth restriction (IUGR) is linked to increased risk for chronic disease. Placental ischemia and insufficiency in the mother are implicated in predisposing IUGR offspring to metabolic dysfunction, including hypertension, insulin resistance, abnormalities in glucose homeostasis, and nonalcoholic fatty liver disease (NAFLD). It is unclear whether these metabolic disturbances contribute to the developmental origins of exaggerated cardiovascular-renal disease (CVRD) risk accompanying IUGR. IUGR impacts the pancreas, adipose tissue, and liver, which are hypothesized to program for hepatic insulin resistance and subsequent NAFLD. NAFLD is projected to become the major cause of chronic liver disease and contributor to uncontrolled type 2 diabetes mellitus, which is a leading cause of chronic kidney disease. While NAFLD is increased in experimental models of IUGR, lacking is a full comprehension of the mechanisms responsible for programming of NAFLD and whether this potentiates susceptibility to liver injury. The use of well-established and clinically relevant rodent models, which mimic the clinical characteristics of IUGR, metabolic disturbances, and increased blood pressure in the offspring, will permit investigation into mechanisms linking adverse influences during early life and later chronic health. The purpose of this review is to propose mechanisms, including those proinflammatory in nature, whereby IUGR exacerbates the pathogenesis of NAFLD and how these adverse programmed outcomes contribute to exaggerated CVRD risk. Understanding the etiology of the developmental origins of chronic disease will allow investigators to uncover treatment strategies to intervene in the mother and her offspring to halt the increasing prevalence of metabolic dysfunction and CVRD.
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Affiliation(s)
- Frank T Spradley
- Department of Surgery, Division of Transplant and Hepatobiliary Surgery, School of Medicine, The University of Mississippi Medical Center , Jackson, Mississippi
- Cardiovascular-Renal Research Center, The University of Mississippi Medical Center , Jackson, Mississippi
- Department of Physiology and Biophysics, The University of Mississippi Medical Center , Jackson, Mississippi
| | - Jillian A Smith
- Department of Surgery, Division of Transplant and Hepatobiliary Surgery, School of Medicine, The University of Mississippi Medical Center , Jackson, Mississippi
| | - Barbara T Alexander
- Cardiovascular-Renal Research Center, The University of Mississippi Medical Center , Jackson, Mississippi
- Department of Physiology and Biophysics, The University of Mississippi Medical Center , Jackson, Mississippi
| | - Christopher D Anderson
- Department of Surgery, Division of Transplant and Hepatobiliary Surgery, School of Medicine, The University of Mississippi Medical Center , Jackson, Mississippi
- Cardiovascular-Renal Research Center, The University of Mississippi Medical Center , Jackson, Mississippi
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608
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Chauhan P, Tamrakar AK, Mahajan S, Prasad GBKS. Chitosan encapsulated nanocurcumin induces GLUT-4 translocation and exhibits enhanced anti-hyperglycemic function. Life Sci 2018; 213:226-235. [PMID: 30343126 DOI: 10.1016/j.lfs.2018.10.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/07/2018] [Accepted: 10/13/2018] [Indexed: 11/19/2022]
Abstract
AIM The present study was undertaken to develop a Curcumin nanoparticle system with chitosan as a hydrophilic carrier. In addition, the anti-diabetic potential of curcumin loaded chitosan nanoparticles were assessed in comparison to those of free curcumin by examining the anti-hyperglycemic efficacy using in vitro assays. METHODS Curcumin loaded chitosan nanoparticles were prepared and characterized for particle size by transmission electron microscopy, FT-IR, differential scanning calorimetry and therapeutic effects of curcumin loaded chitosan nanoparticles were evaluated by measuring the level of GLUT-4 present at the plasma membrane in L6myc myotubes followed by western blotting. Additionally, anti-inflammatory potential of curcumin loaded chitosan nanoparticles were assessed by enzyme immunoassay using appropriate ELISA kits. KEY FINDINGS Transmission electron microscopy revealed an average nanocurcumin particle size of 74 nm. Under in vitro conditions, treatment with chitosan-nanocurcumin (CS-NC) caused a substantial increase in the GLUT-4 translocation to the cell surface in L6 skeletal muscle cells and the effect was associated with increased phosphorylation of AKT (Ser-473) and its downstream target GSK-3β (Ser-9). SIGNIFICANCE The therapeutic potential of nanocurcumin is prominent than that of curcumin alone. Nanocurcumin could improve the solubility of curcumin and may prolong its retention in the systemic circulation.
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Affiliation(s)
- Pratibha Chauhan
- School of Studies in Biochemistry, Jiwaji University, Gwalior 474011, India
| | | | - Sunil Mahajan
- School of Studies in Biochemistry, Jiwaji University, Gwalior 474011, India
| | - G B K S Prasad
- School of Studies in Biochemistry, Jiwaji University, Gwalior 474011, India.
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609
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Zhao M, Yuan L, Yuan MM, Huang LL, Su C, Chen YH, Yang YY, Hu Y, Xu DX. Maternal lipopolysaccharide exposure results in glucose metabolism disorders and sex hormone imbalance in male offspring. Mol Cell Endocrinol 2018; 474:272-283. [PMID: 29614340 DOI: 10.1016/j.mce.2018.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 03/16/2018] [Accepted: 03/31/2018] [Indexed: 12/31/2022]
Abstract
An adverse intrauterine environment may be an important factor contributing to the development of type 2 diabetes in later life. The present study investigated the longitudinal effects of maternal lipopolysaccharide (LPS) exposure during the third trimester on glucose metabolism and sex hormone balance in the offspring. Pregnant mice were intraperitoneally injected with LPS (50 μg/kg) daily from gestational day (GD) 15 to GD17. Glucose tolerance test (GTT) and insulin tolerance test (ITT) were assessed at postnatal day (PND) 60 and PND120. Sex hormones, their receptors, and metabolic enzymes (aromatase) were measured in male offspring at different phases of development (PND14: juvenile; PND35: adolescence; PND60: adulthood; and PND120: middle age). LPS-exposed male offspring exhibited glucose intolerance and insulin resistance by GTT and ITT at middle age, accompanied by an increase in fasting blood glucose and reductions in serum insulin levels and hepatic phosphorylated (p) -AKT/AKT ratio. However, glucose intolerance and insulin resistance were not observed in LPS-exposed female offspring. Maternal LPS exposure upregulated hepatic aromatase proteins and mRNA levels in male offspring at all time points. At adolescence, the testosterone/estradiol ratio (T/E2) was markedly reduced in LPS-exposed male offspring. Moreover, maternal LPS exposure significantly increased hepatic estrogen receptor (ER) α expressions and decreased hepatic androgen receptor (AR) expressions in male offspring. At adulthood, maternal LPS exposure increased serum estradiol levels, decreased serum testosterone levels and elevated hepatic ERβ expressions in male offspring. In conclusion, maternal LPS exposure upregulated aromatase expressions, followed by a reduction in the T/E2 ratio and an alteration in sex hormone receptor activity, which might be involved in the development of glucose metabolism disorders in middle-aged male offspring. This study provides a novel clue and direction to clarify the pathogenesis of maternal infection-related diabetes in male offspring.
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Affiliation(s)
- Mei Zhao
- School of Nursing, Anhui Medical University, Hefei 230032, China; Anhui Provincial Key Laboratory of Population Health & Aristogenics, Hefei, 230032, China.
| | - Li Yuan
- School of Nursing, Anhui Medical University, Hefei 230032, China
| | - Man-Man Yuan
- School of Nursing, Anhui Medical University, Hefei 230032, China
| | - Li-Li Huang
- School of Nursing, Anhui Medical University, Hefei 230032, China
| | - Chang Su
- The Fourth Affiliated Hospital of Anhui Medical University, Hefei 230032, China
| | - Yuan-Hua Chen
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Hefei, 230032, China; Department of Histology and Embryology, Anhui Medical University, Hefei, 230032, China
| | - Yu-Ying Yang
- School of Nursing, Anhui Medical University, Hefei 230032, China
| | - Yan Hu
- School of Nursing, Anhui Medical University, Hefei 230032, China
| | - De-Xiang Xu
- Anhui Provincial Key Laboratory of Population Health & Aristogenics, Hefei, 230032, China; Department of Toxicology, Anhui Medical University, Hefei, 230032, China
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610
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Bosy-Westphal A, Braun W, Albrecht V, Müller MJ. Determinants of ectopic liver fat in metabolic disease. Eur J Clin Nutr 2018; 73:209-214. [PMID: 30323174 DOI: 10.1038/s41430-018-0323-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 09/09/2018] [Indexed: 12/17/2022]
Abstract
Common obesity-associated hepatic steatosis (nonalcoholic fatty liver disease (NAFLD)) and insulin resistance are mainly caused by dysfunctional adipose tissue. This adipose tissue dysfunction leads to increased delivery of NEFA and glycerol to the liver that (i) drives hepatic gluconeogenesis and (ii) facilitates the accumulation of lipids and insulin signaling inhibiting lipid intermediates. Dysfunctional adipose tissue can be caused by impaired lipid storage (overflow hypothesis, characterized by large visceral adipocytes) or increased lipolysis (due to impaired postprandial suppression of lipolysis in inflamed, insulin-resistant adipocytes). In line with the adipose tissue expandability hypothesis the amount and distribution of adipose tissue correlate with its dysfunction and thus with liver fat. This relationship is however modified by endocrine effects on lipid storage and lipolysis as well as dietary effects on hepatic lipogenesis and lipid oxidation. The association between body composition characteristics like visceral obesity or fat cell size and ectopic liver fat is modified by these influences. Phenotyping obesity according to metabolic risk should integrate body composition characteristics, endocrine parameters and information on diet.
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Affiliation(s)
- Anja Bosy-Westphal
- Institute for Human Nutrition and Food Science, Christian-Albrechts-University Kiel, Kiel, Germany.
| | - Wiebke Braun
- Institute for Human Nutrition and Food Science, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Viktoria Albrecht
- Institute for Human Nutrition and Food Science, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Manfred J Müller
- Institute for Human Nutrition and Food Science, Christian-Albrechts-University Kiel, Kiel, Germany
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611
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Polianskyte-Prause Z, Tolvanen TA, Lindfors S, Dumont V, Van M, Wang H, Dash SN, Berg M, Naams JB, Hautala LC, Nisen H, Mirtti T, Groop PH, Wähälä K, Tienari J, Lehtonen S. Metformin increases glucose uptake and acts renoprotectively by reducing SHIP2 activity. FASEB J 2018; 33:2858-2869. [PMID: 30321069 PMCID: PMC6338644 DOI: 10.1096/fj.201800529rr] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Metformin, the first-line drug to treat type 2 diabetes (T2D), inhibits mitochondrial glycerolphosphate dehydrogenase in the liver to suppress gluconeogenesis. However, the direct target and the underlying mechanisms by which metformin increases glucose uptake in peripheral tissues remain uncharacterized. Lipid phosphatase Src homology 2 domain-containing inositol-5-phosphatase 2 (SHIP2) is upregulated in diabetic rodent models and suppresses insulin signaling by reducing Akt activation, leading to insulin resistance and diminished glucose uptake. Here, we demonstrate that metformin directly binds to and reduces the catalytic activity of the recombinant SHIP2 phosphatase domain in vitro. Metformin inhibits SHIP2 in cultured cells and in skeletal muscle and kidney of db/db mice. In SHIP2-overexpressing myotubes, metformin ameliorates reduced glucose uptake by slowing down glucose transporter 4 endocytosis. SHIP2 overexpression reduces Akt activity and enhances podocyte apoptosis, and both are restored to normal levels by metformin. SHIP2 activity is elevated in glomeruli of patients with T2D receiving nonmetformin medication, but not in patients receiving metformin, compared with people without diabetes. Furthermore, podocyte loss in kidneys of metformin-treated T2D patients is reduced compared with patients receiving nonmetformin medication. Our data unravel a novel molecular mechanism by which metformin enhances glucose uptake and acts renoprotectively by reducing SHIP2 activity.-Polianskyte-Prause, Z., Tolvanen, T. A., Lindfors, S., Dumont, V., Van, M., Wang, H., Dash, S. N., Berg, M., Naams, J.-B., Hautala, L. C., Nisen, H., Mirtti, T., Groop, P.-H., Wähälä, K., Tienari, J., Lehtonen, S. Metformin increases glucose uptake and acts renoprotectively by reducing SHIP2 activity.
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Affiliation(s)
| | | | - Sonja Lindfors
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Vincent Dumont
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Mervi Van
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Hong Wang
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Surjya N Dash
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Mika Berg
- Department of Chemistry, University of Helsinki, Helsinki, Finland
| | | | - Laura C Hautala
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Harry Nisen
- Department of Urology, Helsinki University Hospital, Helsinki, Finland
| | - Tuomas Mirtti
- Department of Pathology, University of Helsinki, Helsinki, Finland
| | - Per-Henrik Groop
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, University of Helsinki, Helsinki, Finland.,Abdominal Center Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Research Program Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland.,Central Clinical School, Monash University, Melbourne, Victoria, Australia; and
| | - Kristiina Wähälä
- Department of Chemistry, University of Helsinki, Helsinki, Finland
| | - Jukka Tienari
- Department of Pathology, University of Helsinki, Helsinki, Finland.,Helsinki University Hospital, Hyvinkää, Finland
| | - Sanna Lehtonen
- Department of Pathology, University of Helsinki, Helsinki, Finland
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612
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Yan X, Wang Z, Bishop CA, Weitkunat K, Feng X, Tarbier M, Luo J, Friedländer MR, Burkhardt R, Klaus S, Willnow TE, Poy MN. Control of hepatic gluconeogenesis by Argonaute2. Mol Metab 2018; 18:15-24. [PMID: 30348590 PMCID: PMC6308973 DOI: 10.1016/j.molmet.2018.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 09/30/2018] [Accepted: 10/04/2018] [Indexed: 12/14/2022] Open
Abstract
Objective The liver performs a central role in regulating energy homeostasis by increasing glucose output during fasting. Recent studies on Argonaute2 (Ago2), a key RNA-binding protein mediating the microRNA pathway, have illustrated its role in adaptive mechanisms according to changes in metabolic demand. Here we sought to characterize the functional role of Ago2 in the liver in the maintenance of systemic glucose homeostasis. Methods We first analyzed Ago2 expression in mouse primary hepatocyte cultures after modulating extracellular glucose concentrations and in the presence of activators or inhibitors of glucokinase activity. We then characterized a conditional loss-of-function mouse model of Ago2 in liver for alterations in systemic energy metabolism. Results Here we show that Ago2 expression in liver is directly correlated to extracellular glucose concentrations and that modulating glucokinase activity is adequate to affect hepatic Ago2 levels. Conditional deletion of Ago2 in liver resulted in decreased fasting glucose levels in addition to reducing hepatic glucose production. Moreover, loss of Ago2 promoted hepatic expression of AMP-activated protein kinase α1 (AMPKα1) by de-repressing its targeting by miR-148a, an abundant microRNA in the liver. Deletion of Ago2 from hyperglycemic, obese, and insulin-resistant Lepob/ob mice reduced both random and fasted blood glucose levels and body weight and improved insulin sensitivity. Conclusions These data illustrate a central role for Ago2 in the adaptive response of the liver to fasting. Ago2 mediates the suppression of AMPKα1 by miR-148a, thereby identifying a regulatory link between non-coding RNAs and a key stress regulator in the hepatocyte. Hepatic Ago2 levels correlate with changes in extracellular glucose concentrations. Conditional deletion of Ago2 in liver decreased fasting glucose levels. Loss of Ago2 promoted AMPKα1 by de-repressing its targeting by miR-148a. Deletion of Ago2 from Lepob/ob mice improved glycemia and insulin sensitivity.
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Affiliation(s)
- Xin Yan
- Max Delbrück Center for Molecular Medicine, Robert Rössle Strasse 10, Berlin, Germany
| | - Zhen Wang
- Max Delbrück Center for Molecular Medicine, Robert Rössle Strasse 10, Berlin, Germany
| | - Christopher A Bishop
- Max Delbrück Center for Molecular Medicine, Robert Rössle Strasse 10, Berlin, Germany; Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Karolin Weitkunat
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Xiao Feng
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, Rostock, Germany
| | - Marcel Tarbier
- Science for Life Laboratory, Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 17121, Stockholm, Sweden
| | - Jiankai Luo
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, Rostock, Germany
| | - Marc R Friedländer
- Science for Life Laboratory, Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 17121, Stockholm, Sweden
| | - Ralph Burkhardt
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Liebigstrasse 27b, Leipzig, Germany; Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, Germany
| | - Susanne Klaus
- Department of Physiology of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Thomas E Willnow
- Max Delbrück Center for Molecular Medicine, Robert Rössle Strasse 10, Berlin, Germany
| | - Matthew N Poy
- Max Delbrück Center for Molecular Medicine, Robert Rössle Strasse 10, Berlin, Germany; John Hopkins University, All Children's Hospital, St. Petersburg, Florida, USA.
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613
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Petersen MC, Shulman GI. Mechanisms of Insulin Action and Insulin Resistance. Physiol Rev 2018; 98:2133-2223. [PMID: 30067154 PMCID: PMC6170977 DOI: 10.1152/physrev.00063.2017] [Citation(s) in RCA: 1375] [Impact Index Per Article: 229.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/22/2018] [Accepted: 03/24/2018] [Indexed: 12/15/2022] Open
Abstract
The 1921 discovery of insulin was a Big Bang from which a vast and expanding universe of research into insulin action and resistance has issued. In the intervening century, some discoveries have matured, coalescing into solid and fertile ground for clinical application; others remain incompletely investigated and scientifically controversial. Here, we attempt to synthesize this work to guide further mechanistic investigation and to inform the development of novel therapies for type 2 diabetes (T2D). The rational development of such therapies necessitates detailed knowledge of one of the key pathophysiological processes involved in T2D: insulin resistance. Understanding insulin resistance, in turn, requires knowledge of normal insulin action. In this review, both the physiology of insulin action and the pathophysiology of insulin resistance are described, focusing on three key insulin target tissues: skeletal muscle, liver, and white adipose tissue. We aim to develop an integrated physiological perspective, placing the intricate signaling effectors that carry out the cell-autonomous response to insulin in the context of the tissue-specific functions that generate the coordinated organismal response. First, in section II, the effectors and effects of direct, cell-autonomous insulin action in muscle, liver, and white adipose tissue are reviewed, beginning at the insulin receptor and working downstream. Section III considers the critical and underappreciated role of tissue crosstalk in whole body insulin action, especially the essential interaction between adipose lipolysis and hepatic gluconeogenesis. The pathophysiology of insulin resistance is then described in section IV. Special attention is given to which signaling pathways and functions become insulin resistant in the setting of chronic overnutrition, and an alternative explanation for the phenomenon of ‟selective hepatic insulin resistanceˮ is presented. Sections V, VI, and VII critically examine the evidence for and against several putative mediators of insulin resistance. Section V reviews work linking the bioactive lipids diacylglycerol, ceramide, and acylcarnitine to insulin resistance; section VI considers the impact of nutrient stresses in the endoplasmic reticulum and mitochondria on insulin resistance; and section VII discusses non-cell autonomous factors proposed to induce insulin resistance, including inflammatory mediators, branched-chain amino acids, adipokines, and hepatokines. Finally, in section VIII, we propose an integrated model of insulin resistance that links these mediators to final common pathways of metabolite-driven gluconeogenesis and ectopic lipid accumulation.
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Affiliation(s)
- Max C Petersen
- Departments of Internal Medicine and Cellular & Molecular Physiology, Howard Hughes Medical Institute, Yale University School of Medicine , New Haven, Connecticut
| | - Gerald I Shulman
- Departments of Internal Medicine and Cellular & Molecular Physiology, Howard Hughes Medical Institute, Yale University School of Medicine , New Haven, Connecticut
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614
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Gaudichon C, Ta HY, Khodorova NV, Oberli M, Breton I, Benamouzig R, Tomé D, Godin JP. Time course of fractional gluconeogenesis after meat ingestion in healthy adults: a D 2O study. Am J Physiol Endocrinol Metab 2018; 315:E454-E459. [PMID: 29920213 DOI: 10.1152/ajpendo.00157.2018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the postprandial state, glucose homeostasis is challenged by macronutrient intake, including proteins that trigger insulin secretion and provide glucose precursors. However, little is known about the postprandial response of gluconeogenesis to a protein meal. We aimed to quantify the evolution of fractional gluconeogenesis after a meat meal. Thirteen healthy subjects received oral doses of D2O. After fasting overnight, they ingested a steak (120 g). Glycemia, insulinemia, and 2H enrichments in glucose and plasma water were measured for 8 h after the meal. Fractional gluconeogenesis was assessed using the average method. Glucose was stable for 5 h and then decreased. There was a slight increase of insulin 1 h after the meal. 2H enrichment in the carbon 5 position of glucose (C5) increased after 2 h, whereas it decreased in plasma water. Consequently, fractional gluconeogenesis increased from 68.2 ± 7.2% before the meal to 75.5 ± 5.8% 8 h after the meal, the latter corresponding to 22 h without a glucose supply. These values are consistent with the exhaustion of glycogen stores after 24 h but represent the highest among values in the literature. The impact of methodological conditions is discussed.
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Affiliation(s)
- Claire Gaudichon
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay , 75005, Paris , France
| | - Hai-Yen Ta
- Institute of Food Safety and Analytical Sciences, Nestle Research, Vers-chez-les Blanc, 1000-Lausanne , Switzerland
| | - Nadezda V Khodorova
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay , 75005, Paris , France
| | - Marion Oberli
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay , 75005, Paris , France
| | - Isabelle Breton
- Institute of Food Safety and Analytical Sciences, Nestle Research, Vers-chez-les Blanc, 1000-Lausanne , Switzerland
| | - Robert Benamouzig
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay , 75005, Paris , France
| | - Daniel Tomé
- UMR PNCA, AgroParisTech, INRA, Université Paris-Saclay , 75005, Paris , France
| | - Jean-Philippe Godin
- Institute of Food Safety and Analytical Sciences, Nestle Research, Vers-chez-les Blanc, 1000-Lausanne , Switzerland
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615
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Sargeant JA, Gray LJ, Bodicoat DH, Willis SA, Stensel DJ, Nimmo MA, Aithal GP, King JA. The effect of exercise training on intrahepatic triglyceride and hepatic insulin sensitivity: a systematic review and meta-analysis. Obes Rev 2018; 19:1446-1459. [PMID: 30092609 DOI: 10.1111/obr.12719] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/08/2018] [Accepted: 05/09/2018] [Indexed: 12/12/2022]
Abstract
This systematic review and meta-analysis determined the impact of structured exercise training, and the influence of associated weight loss, on intrahepatic triglyceride (IHTG) in individuals with non-alcoholic fatty liver disease (NAFLD). It also examined its effect on hepatic insulin sensitivity in individuals with or at increased risk of NAFLD. Analyses were restricted to studies using magnetic resonance spectroscopy or liver biopsy for the measurement of IHTG and isotope-labelled glucose tracer for assessment of hepatic insulin sensitivity. Pooling data from 17 studies (373 exercising participants), exercise training for one to 24 weeks (mode: 12 weeks) elicits an absolute reduction in IHTG of 3.31% (95% CI: -4.41 to -2.22%). Exercise reduces IHTG independent of significant weight change (-2.16 [-2.87 to -1.44]%), but benefits are substantially greater when weight loss occurs (-4.87 [-6.64 to -3.11]%). Furthermore, meta-regression identified a positive association between percentage weight loss and absolute reduction in IHTG (β = 0.99 [0.62 to 1.36], P < 0.001). Pooling of six studies (94 participants) suggests that exercise training also improves basal hepatic insulin sensitivity (mean change in hepatic insulin sensitivity index: 0.13 [0.05 to 0.21] mg m-2 min-1 per μU mL-1 ), but available evidence is limited, and the impact of exercise on insulin-stimulated hepatic insulin sensitivity remains unclear.
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Affiliation(s)
- J A Sargeant
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.,National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, Leicester, UK
| | - L J Gray
- Department of Health Sciences, University of Leicester, Leicester, UK
| | - D H Bodicoat
- National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, Leicester, UK.,Diabetes Research Centre, University of Leicester, Leicester, UK
| | - S A Willis
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.,National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, Leicester, UK
| | - D J Stensel
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.,National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, Leicester, UK
| | - M A Nimmo
- College of Life and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - G P Aithal
- Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK.,National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK
| | - J A King
- National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.,National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, Leicester, UK
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616
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PKCε contributes to lipid-induced insulin resistance through cross talk with p70S6K and through previously unknown regulators of insulin signaling. Proc Natl Acad Sci U S A 2018; 115:E8996-E9005. [PMID: 30181290 DOI: 10.1073/pnas.1804379115] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Insulin resistance drives the development of type 2 diabetes (T2D). In liver, diacylglycerol (DAG) is a key mediator of lipid-induced insulin resistance. DAG activates protein kinase C ε (PKCε), which phosphorylates and inhibits the insulin receptor. In rats, a 3-day high-fat diet produces hepatic insulin resistance through this mechanism, and knockdown of hepatic PKCε protects against high-fat diet-induced hepatic insulin resistance. Here, we employed a systems-level approach to uncover additional signaling pathways involved in high-fat diet-induced hepatic insulin resistance. We used quantitative phosphoproteomics to map global in vivo changes in hepatic protein phosphorylation in chow-fed, high-fat-fed, and high-fat-fed with PKCε knockdown rats to distinguish the impact of lipid- and PKCε-induced protein phosphorylation. This was followed by a functional siRNA-based screen to determine which dynamically regulated phosphoproteins may be involved in canonical insulin signaling. Direct PKCε substrates were identified by motif analysis of phosphoproteomics data and validated using a large-scale in vitro kinase assay. These substrates included the p70S6K substrates RPS6 and IRS1, which suggested cross talk between PKCε and p70S6K in high-fat diet-induced hepatic insulin resistance. These results identify an expanded set of proteins through which PKCε may drive high-fat diet-induced hepatic insulin resistance that may direct new therapeutic approaches for T2D.
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617
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Ellingwood SS, Cheng A. Biochemical and clinical aspects of glycogen storage diseases. J Endocrinol 2018; 238:R131-R141. [PMID: 29875163 PMCID: PMC6050127 DOI: 10.1530/joe-18-0120] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 06/04/2018] [Indexed: 12/29/2022]
Abstract
The synthesis of glycogen represents a key pathway for the disposal of excess glucose while its degradation is crucial for providing energy during exercise and times of need. The importance of glycogen metabolism is also highlighted by human genetic disorders that are caused by mutations in the enzymes involved. In this review, we provide a basic summary on glycogen metabolism and some of the clinical aspects of the classical glycogen storage diseases. Disruptions in glycogen metabolism usually result in some level of dysfunction in the liver, muscle, heart, kidney and/or brain. Furthermore, the spectrum of symptoms observed is very broad, depending on the affected enzyme. Finally, we briefly discuss an aspect of glycogen metabolism related to the maintenance of its structure that seems to be gaining more recent attention. For example, in Lafora progressive myoclonus epilepsy, patients exhibit an accumulation of inclusion bodies in several tissues, containing glycogen with increased phosphorylation, longer chain lengths and irregular branch points. This abnormal structure is thought to make glycogen insoluble and resistant to degradation. Consequently, its accumulation becomes toxic to neurons, leading to cell death. Although the genes responsible have been identified, studies in the past two decades are only beginning to shed light into their molecular functions.
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Affiliation(s)
- Sara S Ellingwood
- Department of Biochemistry and Molecular GeneticsUniversity of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Alan Cheng
- Department of Biochemistry and Molecular GeneticsUniversity of Louisville School of Medicine, Louisville, Kentucky, USA
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618
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Behringer V, Deimel C, Hohmann G, Negrey J, Schaebs FS, Deschner T. Applications for non-invasive thyroid hormone measurements in mammalian ecology, growth, and maintenance. Horm Behav 2018; 105:66-85. [PMID: 30063897 DOI: 10.1016/j.yhbeh.2018.07.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 07/24/2018] [Accepted: 07/25/2018] [Indexed: 12/22/2022]
Abstract
Thyroid hormones (THs) play a pivotal role in the regulation of metabolic activity throughout all life stages. Cross-talk with other hormone systems permits THs to coordinate metabolic changes as well as modifications in growth and maintenance in response to changing environmental conditions. The scope of this review is to explain the relevant basics of TH endocrinology, highlight pertinent topics that have been investigated so far, and offer guidance on measuring THs in non-invasively collected matrices. The first part of the review provides an overview of TH biochemistry, which is necessary to understand and interpret the findings of existing studies and to apply non-invasive TH monitoring. The second part focuses on the role of THs in mammalian ecology, and the third part highlights the role of THs in growth and maintenance. The fourth part deals with the advantages and difficulties of measuring THs in non-invasively collected samples. This review concludes with a summary that considers future directions in the study of THs.
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Affiliation(s)
- V Behringer
- Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany.
| | - C Deimel
- Department of Anthropology, Indiana University Bloomington, 701 E Kirkwood Ave, Bloomington, IN 47405, USA
| | - G Hohmann
- Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
| | - J Negrey
- Department of Anthropology, Boston University, 232 Bay State Road, Boston, MA 02215, USA
| | - F S Schaebs
- Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
| | - T Deschner
- Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
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619
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Trans-Ferulic Acid-4-β-Glucoside Alleviates Cold-Induced Oxidative Stress and Promotes Cold Tolerance. Int J Mol Sci 2018; 19:ijms19082321. [PMID: 30096768 PMCID: PMC6121433 DOI: 10.3390/ijms19082321] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/30/2018] [Accepted: 08/06/2018] [Indexed: 12/16/2022] Open
Abstract
Trans-ferulic acid-4-β-glucoside (C16H20O9, TFA-4β-G) is a monomer extracted from the Chinese medicine called radix aconiti carmichaeli (Fuzi). To date, research on this substance is lacking. Here, we found that trans-ferulic acid-4-β-glucoside effectively promoted cold acclimatization in mice via increased heat production and alleviation of oxidative stress in a cold environment. Thus, our work indicates that ferulic acid-4-β-glucoside is a potential therapeutic candidate for prevention and treatment of cold stress injury.
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620
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Kim KE, Heo JS, Han S, Kwon SK, Kim SY, Kim JH, Baek KH, Sheen YH. Blood concentrations of lipopolysaccharide-binding protein, high-sensitivity C-reactive protein, tumor necrosis factor-α, and Interleukin-6 in relation to insulin resistance in young adolescents. Clin Chim Acta 2018; 486:115-121. [PMID: 30059659 DOI: 10.1016/j.cca.2018.07.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 07/26/2018] [Accepted: 07/26/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND We assessed the association of insulin resistance as indicated by the homeostatic model assessment of insulin resistance (HOMA-IR) with inflammatory molecules, lipopolysaccharide-binding protein (LBP), high sensitivity C-reactive protein (hs-CRP), Tumor necrosis factor-α (TNF-α), and Interleukin-6 (IL-6) in urban young adolescents. METHODS Seventy-six adolescents (36 subjects with HOMA-IR ≥ 2.6 and 40 subjects with HOMA-IR < 2.6) were included in the study. We assessed anthropometric and laboratory measures, such as BMI, blood pressure, insulin sensitivity, liver enzymes, and lipid profiles along with the aforementioned inflammatory biomarkers. The diagnostic accuracy of LBP, hs-CRP, TNF-α, and IL-6 for insulin resistance was evaluated by using the receiver operating characteristic (ROC) curve analysis. RESULTS The mean age of the study subjects was 12.0 [12.0-13.0] y. Circulating LBP plasma concentration and hs-CRP were significantly increased in subjects with HOMA-IR ≥ 2.6 when compared with those with HOMA-IR < 2.6 (P < .0001). There was no difference in TNF-α or IL-6 concentrations between groups. Comparisons based on the area under the ROC curve for LBP, hs-CRP, TNF-α, and IL-6 with regard to insulin resistance (HOMA-IR ≥ 2.6) were 0.8384 (95% CI: 0.7380 to 0.9388), 0.7907 (95% CI: 0.6701 to 0.9113), 0.6207 (95% CI: 0.4770 to 0.7643), and 0.5763 (95% CI: 0.4285 to 0.7241), respectively. CONCLUSIONS Among LBP, hs-CRP, TNF-α, and IL-6, plasma LBP has the greatest diagnostic accuracy for insulin resistance in young adolescents. Prospective studies are warranted to delineate the value of LBP in the prediction of insulin resistance.
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Affiliation(s)
- Ki Eun Kim
- Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Republic of Korea
| | - Ju Sun Heo
- Department of Pediatrics, Korea University Anam Hospital, Seoul, Republic of Korea
| | - Sol Han
- Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Republic of Korea
| | - Seul-Ki Kwon
- Department of Biomedical Science, CHA University, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - Soo-Yeon Kim
- Department of Biomedical Science, CHA University, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - Jung Hyun Kim
- Atmin Radiology and Health Promotion Center, Seoul, Republic of Korea
| | - Kwang-Hyun Baek
- Department of Biomedical Science, CHA University, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - Youn Ho Sheen
- Department of Pediatrics, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Republic of Korea.
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621
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McMurphy T, Huang W, Queen NJ, Ali S, Widstrom KJ, Liu X, Xiao R, Siu JJ, Cao L. Implementation of environmental enrichment after middle age promotes healthy aging. Aging (Albany NY) 2018; 10:1698-1721. [PMID: 30036185 PMCID: PMC6075449 DOI: 10.18632/aging.101502] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 07/15/2018] [Indexed: 12/19/2022]
Abstract
With increases in life expectancy, it is vital to understand the dynamics of aging, their interaction with lifestyle factors, and the connections to age-related disease processes. Our work on environmental enrichment (EE), a housing environment boosting mental health, has revealed a novel anticancer and anti-obesity phenotype mediated by a brain-fat axis: the hypothalamic-sympathoneural-adipocyte (HSA) axis in young animals. Here we investigated EE effects on healthspan and lifespan when initiated after middle age. Short-term EE for six weeks activated the HSA axis in 10-month-old mice. Long-term EE for twelve months reduced adiposity, improved glucose tolerance, decreased leptin levels, enhanced motor abilities, and inhibited anxiety. In addition to adipose remodeling, EE decreased age-related liver steatosis, reduced hepatic glucose production, and increased glucose uptake by liver and adipose tissue contributing to the improved glycemic control. The EE-induced liver modulation was associated with a suppression of protein kinase Cε. Moreover, EE down-regulated the expression of inflammatory genes in the brain, adipose, and liver. EE initiated at 18-month of age significantly improved glycemic control and showed a trend of positive impact on mean lifespan. These data suggest that EE induces metabolic and behavioral adaptations that are shared by factors known to increase healthspan and lifespan.
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Affiliation(s)
- Travis McMurphy
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- Equal contribution
| | - Wei Huang
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- Equal contribution
| | - Nicholas J. Queen
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Seemaab Ali
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Kyle J. Widstrom
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Xianglan Liu
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Run Xiao
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Jason J. Siu
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Lei Cao
- Department of Cancer Biology and Genetics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
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622
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Calamita G, Perret J, Delporte C. Aquaglyceroporins: Drug Targets for Metabolic Diseases? Front Physiol 2018; 9:851. [PMID: 30042691 PMCID: PMC6048697 DOI: 10.3389/fphys.2018.00851] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 06/15/2018] [Indexed: 12/29/2022] Open
Abstract
Aquaporins (AQPs) are a family of transmembrane channel proteins facilitating the transport of water, small solutes, and gasses across biological membranes. AQPs are expressed in all tissues and ensure multiple roles under normal and pathophysiological conditions. Aquaglyceroporins are a subfamily of AQPs permeable to glycerol in addition to water and participate thereby to energy metabolism. This review focalizes on the present knowledge of the expression, regulation and physiological roles of AQPs in adipose tissue, liver and endocrine pancreas, that are involved in energy metabolism. In addition, the review aims at summarizing the involvement of AQPs in metabolic disorders, such as obesity, diabetes and liver diseases. Finally, challenges and recent advances related to pharmacological modulation of AQPs expression and function to control and treat metabolic diseases are discussed.
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Affiliation(s)
- Giuseppe Calamita
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari Aldo Moro, Bari, Italy
| | - Jason Perret
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Christine Delporte
- Laboratory of Pathophysiological and Nutritional Biochemistry, Université Libre de Bruxelles, Brussels, Belgium
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623
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Molecular phenomics and metagenomics of hepatic steatosis in non-diabetic obese women. Nat Med 2018; 24:1070-1080. [PMID: 29942096 PMCID: PMC6140997 DOI: 10.1038/s41591-018-0061-3] [Citation(s) in RCA: 417] [Impact Index Per Article: 69.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2018] [Indexed: 02/07/2023]
Abstract
Hepatic steatosis is a multifactorial condition that is often observed in obese patients and is a prelude to non-alcoholic fatty liver disease. Here, we combine shotgun sequencing of fecal metagenomes with molecular phenomics (hepatic transcriptome and plasma and urine metabolomes) in two well-characterized cohorts of morbidly obese women recruited to the FLORINASH study. We reveal molecular networks linking the gut microbiome and the host phenome to hepatic steatosis. Patients with steatosis have low microbial gene richness and increased genetic potential for the processing of dietary lipids and endotoxin biosynthesis (notably from Proteobacteria), hepatic inflammation and dysregulation of aromatic and branched-chain amino acid metabolism. We demonstrated that fecal microbiota transplants and chronic treatment with phenylacetic acid, a microbial product of aromatic amino acid metabolism, successfully trigger steatosis and branched-chain amino acid metabolism. Molecular phenomic signatures were predictive (area under the curve = 87%) and consistent with the gut microbiome having an effect on the steatosis phenome (>75% shared variation) and, therefore, actionable via microbiome-based therapies.
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624
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Huang MC, Douillet C, Dover EN, Stýblo M. Prenatal arsenic exposure and dietary folate and methylcobalamin supplementation alter the metabolic phenotype of C57BL/6J mice in a sex-specific manner. Arch Toxicol 2018; 92:1925-1937. [PMID: 29721587 DOI: 10.1007/s00204-018-2206-z/figures/7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 04/25/2018] [Indexed: 05/22/2023]
Abstract
Inorganic arsenic (iAs) is an established environmental diabetogen. The link between iAs exposure and diabetes is supported by evidence from adult human cohorts and adult laboratory animals. The contribution of prenatal iAs exposure to the development of diabetes and underlying mechanisms are understudied. The role of factors that modulate iAs metabolism and toxicity in adults and their potential to influence diabetogenic effects of prenatal iAs exposure are also unclear. The goal of this study was to determine if prenatal exposure to iAs impairs glucose metabolism in mice and if maternal supplementation with folate and methylcobalamin (B12) can modify this outcome. C57BL/6J dams were exposed to iAs in drinking water (0, 100, and 1000 µg As/L) and fed a folate/B12 adequate or supplemented diet from before mating to birth of offspring. After birth, dams and offspring drank deionized water and were fed the folate/B12 adequate diet. The metabolic phenotype of offspring was assessed over the course of 14 weeks. Male offspring from iAs-exposed dams fed the folate/B12-adequate diet developed fasting hyperglycemia and insulin resistance. Maternal folate/B12 supplementation rescued this phenotype but had only marginal effects on iAs metabolism in dams. The diabetogenic effects of prenatal iAs exposure in male offspring were not associated with changes in global DNA methylation in the liver. Only minimal effects of prenatal iAs exposure or maternal supplementation were observed in female offspring. These results suggest that prenatal iAs exposure impairs glucose metabolism in a sex-specific manner and that maternal folate/B12 supplementation may improve the metabolic phenotype in offspring. Further studies are needed to identify the mechanisms underlying these effects.
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Affiliation(s)
- Madelyn C Huang
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, CB# 7461, Chapel Hill, NC, USA
| | - Ellen N Dover
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Miroslav Stýblo
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, CB# 7461, Chapel Hill, NC, USA.
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625
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Clayton ZS, McCurdy CE. Short-term thermoneutral housing alters glucose metabolism and markers of adipose tissue browning in response to a high-fat diet in lean mice. Am J Physiol Regul Integr Comp Physiol 2018; 315:R627-R637. [PMID: 29791203 DOI: 10.1152/ajpregu.00364.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Systemic insulin resistance and glucose intolerance occur with as little as 3 days of a high-fat diet (HFD) in mice and humans; the mechanisms that initiate acute insulin resistance are unknown. Most laboratories house mice at 22°C, which is below their thermoneutral temperature (~30°C). Cold stress has been shown to increase white adipose tissue (WAT) browning, alter lipid trafficking, and impair immune function, whereas energy intake and expenditure decrease with increasing ambient temperature; importantly, dysregulation of these parameters has been strongly linked to obesity-induced insulin resistance. Therefore, we compared acute changes in glucose metabolism and the metabolic phenotype in lean mice in response to a control diet or HFD housed at standard vivarium (22°C) and thermoneutral (30°C) temperatures. Glucose intolerance occurred following 1 or 5 days of HFD and was independent of housing temperature or adiposity; however, the reduction in tissue-specific glucose clearance with HFD diverged by temperature with reduced brown adipose tissue (BAT) glucose uptake at 22°C but reduced soleus glucose uptake at 30°C. Fasting glucose, food intake, and energy expenditure were significantly lower at 30°C, independent of diet. Additionally, markers of browning in both BAT and inguinal subcutaneous WAT, but not perigonadal epididymal WAT, decreased at 30°C. Together, we find housing temperature has a significant impact on the cellular pathways that regulate glucose tolerance in response to an acute HFD exposure. Thus, even short-term changes in housing temperature should be highly considered in interpretation of metabolic studies in mice.
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Affiliation(s)
- Zachary S Clayton
- Department of Human Physiology, University of Oregon , Eugene, Oregon
| | - Carrie E McCurdy
- Department of Human Physiology, University of Oregon , Eugene, Oregon
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626
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Jia Y, Liu N, Viswakarma N, Sun R, Schipma MJ, Shang M, Thorp EB, Kanwar YS, Thimmapaya B, Reddy JK. PIMT/NCOA6IP Deletion in the Mouse Heart Causes Delayed Cardiomyopathy Attributable to Perturbation in Energy Metabolism. Int J Mol Sci 2018; 19:ijms19051485. [PMID: 29772707 PMCID: PMC5983783 DOI: 10.3390/ijms19051485] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/03/2018] [Accepted: 05/09/2018] [Indexed: 01/09/2023] Open
Abstract
PIMT/NCOA6IP, a transcriptional coactivator PRIP/NCOA6 binding protein, enhances nuclear receptor transcriptional activity. Germline disruption of PIMT results in early embryonic lethality due to impairment of development around blastocyst and uterine implantation stages. We now generated mice with Cre-mediated cardiac-specific deletion of PIMT (csPIMT−/−) in adult mice. These mice manifest enlargement of heart, with nearly 100% mortality by 7.5 months of age due to dilated cardiomyopathy. Significant reductions in the expression of genes (i) pertaining to mitochondrial respiratory chain complexes I to IV; (ii) calcium cycling cardiac muscle contraction (Atp2a1, Atp2a2, Ryr2); and (iii) nuclear receptor PPAR- regulated genes involved in glucose and fatty acid energy metabolism were found in csPIMT−/− mouse heart. Elevated levels of Nppa and Nppb mRNAs were noted in csPIMT−/− heart indicative of myocardial damage. These hearts revealed increased reparative fibrosis associated with enhanced expression of Tgfβ2 and Ctgf. Furthermore, cardiac-specific deletion of PIMT in adult mice, using tamoxifen-inducible Cre-approach (TmcsPIMT−/−), results in the development of cardiomyopathy. Thus, cumulative evidence suggests that PIMT functions in cardiac energy metabolism by interacting with nuclear receptor coactivators and this property could be useful in the management of heart failure.
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Affiliation(s)
- Yuzhi Jia
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Ning Liu
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Navin Viswakarma
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA.
| | - Ruya Sun
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Mathew J Schipma
- Next Generation Sequencing Core Facility, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Meng Shang
- Feinberg Cardiovascular Research Institute and Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Edward B Thorp
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Yashpal S Kanwar
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Bayar Thimmapaya
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Janardan K Reddy
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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627
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Xie W, Ye Y, Feng Y, Xu T, Huang S, Shen J, Leng Y. Linderane Suppresses Hepatic Gluconeogenesis by Inhibiting the cAMP/PKA/CREB Pathway Through Indirect Activation of PDE 3 via ERK/STAT3. Front Pharmacol 2018; 9:476. [PMID: 29867482 PMCID: PMC5962748 DOI: 10.3389/fphar.2018.00476] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 04/23/2018] [Indexed: 12/22/2022] Open
Abstract
The role of phosphodiesterase 3 (PDE3), a cyclic AMP (cAMP)-degrading enzyme, in modulating gluconeogenesis remains unknown. Here, linderane, a natural compound, was found to inhibit gluconeogenesis by activating hepatic PDE3 in rat primary hepatocytes. The underlying molecular mechanism and its effects on whole-body glucose and lipid metabolism were investigated. The effect of linderane on gluconeogenesis, cAMP content, phosphorylation of cAMP-response element-binding protein (CREB) and PDE activity were examined in cultured primary hepatocytes and C57BL/6J mice. The precise mechanism by which linderane activates PDE3 and inhibits the cAMP pathway was explored using pharmacological inhibitors. The amelioration of metabolic disorders was observed in ob/ob mice. Linderane inhibited gluconeogenesis, reduced phosphoenolpyruvate carboxykinase (Pck1) and glucose-6-phosphatase (G6pc) gene expression, and decreased intracellular cAMP concentration and CREB phosphorylation in rat primary hepatocytes under both basal and forskolin-stimulated conditions. In rat primary hepatocytes, it also increased total PDE and PDE3 activity but not PDE4 activity. The suppressive effect of linderane on the cAMP pathway and gluconeogenesis was abolished by the non-specific PDE inhibitor 3-isobutyl-1-methylxanthine (IBMX) and the specific PDE3 inhibitor cilostazol. Linderane indirectly activated PDE3 through extracellular regulated protein kinase 1/2 (ERK1/2) and signal transducer and activator of transcription 3 (STAT3) activation. Linderane improved glucose and lipid metabolism after chronic oral administration in ob/ob mice. Our findings revealed linderane as an indirect PDE3 activator that suppresses gluconeogenesis through cAMP pathway inhibition and has beneficial effects on metabolic syndromes in ob/ob mice. This investigation highlighted the potential for PDE3 activation in the treatment of type 2 diabetes.
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Affiliation(s)
- Wei Xie
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yangliang Ye
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Ying Feng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Tifei Xu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Suling Huang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Jianhua Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Ying Leng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
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628
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Huang MC, Douillet C, Dover EN, Stýblo M. Prenatal arsenic exposure and dietary folate and methylcobalamin supplementation alter the metabolic phenotype of C57BL/6J mice in a sex-specific manner. Arch Toxicol 2018; 92:1925-1937. [PMID: 29721587 DOI: 10.1007/s00204-018-2206-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 04/25/2018] [Indexed: 12/11/2022]
Abstract
Inorganic arsenic (iAs) is an established environmental diabetogen. The link between iAs exposure and diabetes is supported by evidence from adult human cohorts and adult laboratory animals. The contribution of prenatal iAs exposure to the development of diabetes and underlying mechanisms are understudied. The role of factors that modulate iAs metabolism and toxicity in adults and their potential to influence diabetogenic effects of prenatal iAs exposure are also unclear. The goal of this study was to determine if prenatal exposure to iAs impairs glucose metabolism in mice and if maternal supplementation with folate and methylcobalamin (B12) can modify this outcome. C57BL/6J dams were exposed to iAs in drinking water (0, 100, and 1000 µg As/L) and fed a folate/B12 adequate or supplemented diet from before mating to birth of offspring. After birth, dams and offspring drank deionized water and were fed the folate/B12 adequate diet. The metabolic phenotype of offspring was assessed over the course of 14 weeks. Male offspring from iAs-exposed dams fed the folate/B12-adequate diet developed fasting hyperglycemia and insulin resistance. Maternal folate/B12 supplementation rescued this phenotype but had only marginal effects on iAs metabolism in dams. The diabetogenic effects of prenatal iAs exposure in male offspring were not associated with changes in global DNA methylation in the liver. Only minimal effects of prenatal iAs exposure or maternal supplementation were observed in female offspring. These results suggest that prenatal iAs exposure impairs glucose metabolism in a sex-specific manner and that maternal folate/B12 supplementation may improve the metabolic phenotype in offspring. Further studies are needed to identify the mechanisms underlying these effects.
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Affiliation(s)
- Madelyn C Huang
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, CB# 7461, Chapel Hill, NC, USA
| | - Ellen N Dover
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Miroslav Stýblo
- Curriculum in Toxicology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. .,Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, CB# 7461, Chapel Hill, NC, USA.
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629
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Mukherjee R, Moreno‐Fernandez ME, Giles DA, Cappelletti M, Stankiewicz TE, Chan CC, Divanovic S. Nicotinamide adenine dinucleotide phosphate (reduced) oxidase 2 modulates inflammatory vigor during nonalcoholic fatty liver disease progression in mice. Hepatol Commun 2018; 2:546-560. [PMID: 29761170 PMCID: PMC5944572 DOI: 10.1002/hep4.1162] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/10/2018] [Accepted: 02/02/2018] [Indexed: 12/23/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) represents a disease spectrum ranging from benign steatosis to life-threatening cirrhosis and hepatocellular carcinoma. Elevated levels of reactive oxygen species (ROS) and exacerbated inflammatory responses have been implicated in NAFLD progression. Nicotinamide adenine dinucleotide phosphate (reduced) oxidase 2 (NOX2; also known as gp91Phox), the main catalytic subunit of the nicotinamide adenine dinucleotide phosphate (reduced) oxidase complex, modulates ROS production, immune responsiveness, and pathogenesis of obesity-associated metabolic derangements. However, the role of NOX2 in the regulation of immune cell function and inflammatory vigor in NAFLD remains underdefined. Here, we demonstrate that obesogenic diet feeding promoted ROS production by bone marrow, white adipose tissue, and liver immune cells. Genetic ablation of NOX2 impeded immune cell ROS synthesis and was sufficient to uncouple obesity from glucose dysmetabolism and NAFLD pathogenesis. Protection from hepatocellular damage in NOX2-deficient mice correlated with reduced hepatic neutrophil, macrophage, and T-cell infiltration, diminished production of key NAFLD-driving proinflammatory cytokines, and an inherent reduction in T-cell polarization toward Th17 phenotype. Conclusion: Current findings demonstrate a crucial role of the NOX2-ROS axis in immune cell effector function and polarization and consequent NAFLD progression in obesity. Pharmacologic targeting of NOX2 function in immune cells may represent a viable approach for reducing morbidity of obesity-associated NAFLD pathogenesis. (Hepatology Communications 2018;2:546-560).
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Affiliation(s)
- Rajib Mukherjee
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
| | - Maria E. Moreno‐Fernandez
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
| | - Daniel A. Giles
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
- Immunology Graduate ProgramCincinnati Children's Hospital Medical Center and the University of Cincinnati College of MedicineCincinnatiOH
- Present address:
Present address for Daniel A. Giles is La Jolla Institute for Allergy and ImmunologyLa JollaCA
| | - Monica Cappelletti
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
- Present address:
Present address for Monica Cappelletti is Divisions of Neonatology and Developmental Biology, David Geffen School of Medicine at University of California, Los AngelesMattel Children's HospitalLos AngelesCA
| | - Traci E. Stankiewicz
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
| | - Calvin C. Chan
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
- Immunology Graduate ProgramCincinnati Children's Hospital Medical Center and the University of Cincinnati College of MedicineCincinnatiOH
- Medical Scientist Training ProgramCincinnati Children's Hospital Medical Center and the University of Cincinnati College of MedicineCincinnatiOH45220USA
| | - Senad Divanovic
- Department of PediatricsUniversity of Cincinnati College of MedicineCincinnatiOH45220
- Division of ImmunobiologyCincinnati Children's Hospital Medical CenterCincinnatiOH45229USA
- Immunology Graduate ProgramCincinnati Children's Hospital Medical Center and the University of Cincinnati College of MedicineCincinnatiOH
- Medical Scientist Training ProgramCincinnati Children's Hospital Medical Center and the University of Cincinnati College of MedicineCincinnatiOH45220USA
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630
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Muñoz VR, Gaspar RC, Kuga GK, Nakandakari SCBR, Baptista IL, Mekary RA, da Silva ASR, de Moura LP, Ropelle ER, Cintra DE, Pauli JR. Exercise decreases CLK2 in the liver of obese mice and prevents hepatic fat accumulation. J Cell Biochem 2018; 119:5885-5892. [PMID: 29575149 DOI: 10.1002/jcb.26780] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/02/2018] [Indexed: 12/31/2022]
Abstract
The accumulation of fatty acids in the liver associated with obesity condition is also known as nonalcoholic fatty liver disease (NAFLD). The impaired fat oxidation in obesity condition leads to increased hepatic fat accumulation and increased metabolic syndrome risk. On the other hand, physical exercise has been demonstrated as a potent strategy in the prevention of NAFLD. Also, these beneficial effects of exercise occur through different mechanisms. Recently, the Cdc2-like kinase (CLK2) protein was associated with the suppression of fatty acid oxidation and hepatic ketogenesis. Thus, obese animals demonstrated elevated levels of hepatic CLK2 and decreased fat acid oxidation. Here, we explored the effects of chronic physical exercise in the hepatic metabolism of obese mice. Swiss mice were distributed in Lean, Obese (fed with high-fat diet during 16 weeks) and Trained Obese group (fed with high-fat diet during 16 weeks and exercised (at 60% exhaustion velocity during 1 h/5 days/week) during 8 weeks. In our results, the obese animals showed insulin resistance, increased hepatic CLK2 content and increased hepatic fat accumulation compared to the Lean group. Otherwise, the chronic physical exercise improved insulin resistance state, prevented the increased CLK2 in the liver and attenuated hepatic fat accumulation. In summary, these data reveal a new protein involved in the prevention of hepatic fat accumulation after chronic physical exercise. More studies can evidence the negative role of CLK2 in the control of liver metabolism, contributing to the improvement of insulin resistance, obesity, and type 2 diabetes.
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Affiliation(s)
- Vitor R Muñoz
- Laboratory of Molecular Biology of Exercise, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Rafael C Gaspar
- Laboratory of Molecular Biology of Exercise, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Gabriel K Kuga
- Laboratory of Molecular Biology of Exercise, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Susana C B R Nakandakari
- Laboratory of Nutritional Genomics, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Igor L Baptista
- Laboratory of Cell and Tissue Biology, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Rania A Mekary
- Department of Nutrition, Harvard T. Chan School of Public Health, Boston, Massachusetts.,Department of Social and Administrative Sciences, MCPHS University, Boston, Massachusetts
| | - Adelino S R da Silva
- Postgraduate Program in Rehabilitation and Functional Performance, School of Physical Education and Sport of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Leandro P de Moura
- Laboratory of Molecular Biology of Exercise, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil.,OCRC-Obesity and Comorbidities Research Center, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.,CEPECE-Center of Research in Sport Sciences. School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Eduardo R Ropelle
- Laboratory of Molecular Biology of Exercise, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil.,OCRC-Obesity and Comorbidities Research Center, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.,CEPECE-Center of Research in Sport Sciences. School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
| | - Dennys E Cintra
- Laboratory of Nutritional Genomics, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil.,OCRC-Obesity and Comorbidities Research Center, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - José R Pauli
- Laboratory of Molecular Biology of Exercise, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil.,OCRC-Obesity and Comorbidities Research Center, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.,CEPECE-Center of Research in Sport Sciences. School of Applied Sciences, University of Campinas (UNICAMP), Limeira, São Paulo, Brazil
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631
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Wattanavanitchakorn S, Rojvirat P, Chavalit T, MacDonald MJ, Jitrapakdee S. CCAAT-enhancer binding protein-α (C/EBPα) and hepatocyte nuclear factor 4α (HNF4α) regulate expression of the human fructose-1,6-bisphosphatase 1 (FBP1) gene in human hepatocellular carcinoma HepG2 cells. PLoS One 2018; 13:e0194252. [PMID: 29566023 PMCID: PMC5863999 DOI: 10.1371/journal.pone.0194252] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/27/2018] [Indexed: 11/19/2022] Open
Abstract
Fructose-1,6-bisphosphatase (FBP1) plays an essential role in gluconeogenesis. Here we report that the human FBP1 gene is regulated by two liver-enriched transcription factors, CCAAT-enhancer binding protein-α (C/EBPα) and hepatocyte nuclear factor 4α (HNF4α) in human hepatoma HepG2 cells. C/EBPα regulates transcription of FBP1 gene via binding to the two overlapping C/EBPα sites located at nucleotide -228/-208 while HNF4α regulates FBP1 gene through binding to the classical H4-SBM site and direct repeat 3 (DR3) located at nucleotides -566/-554 and -212/-198, respectively. Mutations of these transcription factor binding sites result in marked decrease of C/EBPα- or HNF4α-mediated transcription activation of FBP1 promoter-luciferase reporter expression. Electrophoretic mobility shift assays of -228/-208 C/EBPα or -566/-554 and -212/-198 HNF4α sites with nuclear extract of HepG2 cells overexpressing C/EBPα or HNF4α confirms binding of these two transcription factors to these sites. Finally, we showed that siRNA-mediated suppression of C/EBPα or HNF4α expression in HepG2 cells lowers expression of FBP1 in parallel with down-regulation of expression of other gluconeogenic enzymes. Our results suggest that an overall gluconeogenic program is regulated by these two transcription factors, enabling transcription to occur in a liver-specific manner.
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Affiliation(s)
| | - Pinnara Rojvirat
- Division of Interdisciplinary, Mahidol University, Kanjanaburi, Thailand
| | - Tanit Chavalit
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Michael J. MacDonald
- Childrens Diabetes Center, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
| | - Sarawut Jitrapakdee
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail:
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632
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Krstic J, Galhuber M, Schulz TJ, Schupp M, Prokesch A. p53 as a Dichotomous Regulator of Liver Disease: The Dose Makes the Medicine. Int J Mol Sci 2018; 19:E921. [PMID: 29558460 PMCID: PMC5877782 DOI: 10.3390/ijms19030921] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 02/07/2023] Open
Abstract
Lifestyle-related disorders, such as the metabolic syndrome, have become a primary risk factor for the development of liver pathologies that can progress from hepatic steatosis, hepatic insulin resistance, steatohepatitis, fibrosis and cirrhosis, to the most severe condition of hepatocellular carcinoma (HCC). While the prevalence of liver pathologies is steadily increasing in modern societies, there are currently no approved drugs other than chemotherapeutic intervention in late stage HCC. Hence, there is a pressing need to identify and investigate causative molecular pathways that can yield new therapeutic avenues. The transcription factor p53 is well established as a tumor suppressor and has recently been described as a central metabolic player both in physiological and pathological settings. Given that liver is a dynamic tissue with direct exposition to ingested nutrients, hepatic p53, by integrating cellular stress response, metabolism and cell cycle regulation, has emerged as an important regulator of liver homeostasis and dysfunction. The underlying evidence is reviewed herein, with a focus on clinical data and animal studies that highlight a direct influence of p53 activity on different stages of liver diseases. Based on current literature showing that activation of p53 signaling can either attenuate or fuel liver disease, we herein discuss the hypothesis that, while hyper-activation or loss of function can cause disease, moderate induction of hepatic p53 within physiological margins could be beneficial in the prevention and treatment of liver pathologies. Hence, stimuli that lead to a moderate and temporary p53 activation could present new therapeutic approaches through several entry points in the cascade from hepatic steatosis to HCC.
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Affiliation(s)
- Jelena Krstic
- Gottfried Schatz Research Center for Cell Signaling, Metabolism & Aging, Medical University of Graz, 8010 Graz, Austria.
| | - Markus Galhuber
- Gottfried Schatz Research Center for Cell Signaling, Metabolism & Aging, Medical University of Graz, 8010 Graz, Austria.
| | - Tim J Schulz
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition, Potsdam-Rehhbrücke, 14558 Nuthetal, Germany.
- German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany.
- Institute of Nutritional Science, University of Potsdam, 14558 Nuthetal, Germany.
| | - Michael Schupp
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Pharmacology, Center for Cardiovascular Research, 10117 Berlin, Germany.
| | - Andreas Prokesch
- Gottfried Schatz Research Center for Cell Signaling, Metabolism & Aging, Medical University of Graz, 8010 Graz, Austria.
- BioTechMed-Graz, 8010 Graz, Austria.
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633
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Zhang Y, Guan Q, Liu Y, Zhang Y, Chen Y, Chen J, Liu Y, Su Z. Regulation of hepatic gluconeogenesis by nuclear factor Y transcription factor in mice. J Biol Chem 2018. [PMID: 29530977 DOI: 10.1074/jbc.ra117.000508] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Hepatic gluconeogenesis is essential to maintain blood glucose levels, and its abnormal activation leads to hyperglycemia and type 2 diabetes. However, the molecular mechanisms in the regulation of hepatic gluconeogenesis remain to be fully defined. In this study, using murine hepatocytes and a liver-specific knockout mouse model, we explored the physiological role of nuclear factor Y (NF-Y) in regulating hepatic glucose metabolism and the underlying mechanism. We found that NF-Y targets the gluconeogenesis pathway in the liver. Hepatic NF-Y expression was effectively induced by cAMP, glucagon, and fasting in vivo Lentivirus-mediated NF-Y overexpression in Hepa1-6 hepatocytes markedly raised the gluconeogenic gene expression and cellular glucose production compared with empty vector control cells. Conversely, CRISPR/Cas9-mediated knockdown of NF-Y subunit A (NF-YA) attenuated gluconeogenic gene expression and glucose production. We also provide evidence indicating that CRE-loxP-mediated, liver-specific NF-YA knockout compromises hepatic glucose production. Mechanistically, luciferase reporter gene assays and ChIP analysis indicated that NF-Y activates transcription of the gluconeogenic genes Pck1 and G6pc, by encoding phosphoenolpyruvate carboxykinase (PEPCK) and the glucose-6-phosphatase catalytic subunit (G6Pase), respectively, via directly binding to the CCAAT regulatory sequence motif in their promoters. Of note, NF-Y enhanced gluconeogenesis by interacting with cAMP-responsive element-binding protein (CREB). Overall, our results reveal a previously unrecognized physiological function of NF-Y in controlling glucose metabolism by up-regulating the gluconeogenic genes Pck1 and G6pc Modulation of hepatic NF-Y expression may therefore offer an attractive therapeutic approach to manage type 2 diabetes.
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Affiliation(s)
- Yanjie Zhang
- From the Molecular Medicine Research Center, West China Hospital, State Key Laboratory of Biotherapy, Sichuan University and Collaborative Innovation Center, Chengdu 610041, Sichuan, China
| | - Qiuyue Guan
- the Department of Geriatrics, People's Hospital of Sichuan Province, Chengdu 610041, Sichuan, China, and
| | - Yin Liu
- From the Molecular Medicine Research Center, West China Hospital, State Key Laboratory of Biotherapy, Sichuan University and Collaborative Innovation Center, Chengdu 610041, Sichuan, China
| | - Yuwei Zhang
- the Division of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yulong Chen
- From the Molecular Medicine Research Center, West China Hospital, State Key Laboratory of Biotherapy, Sichuan University and Collaborative Innovation Center, Chengdu 610041, Sichuan, China
| | - Jinglu Chen
- From the Molecular Medicine Research Center, West China Hospital, State Key Laboratory of Biotherapy, Sichuan University and Collaborative Innovation Center, Chengdu 610041, Sichuan, China
| | - Yulan Liu
- From the Molecular Medicine Research Center, West China Hospital, State Key Laboratory of Biotherapy, Sichuan University and Collaborative Innovation Center, Chengdu 610041, Sichuan, China
| | - Zhiguang Su
- From the Molecular Medicine Research Center, West China Hospital, State Key Laboratory of Biotherapy, Sichuan University and Collaborative Innovation Center, Chengdu 610041, Sichuan, China,
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634
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Liu GM, Zhang YM. Targeting FBPase is an emerging novel approach for cancer therapy. Cancer Cell Int 2018; 18:36. [PMID: 29556139 PMCID: PMC5845355 DOI: 10.1186/s12935-018-0533-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/05/2018] [Indexed: 02/06/2023] Open
Abstract
Cancer is a leading cause of death in both developed and developing countries. Metabolic reprogramming is an emerging hallmark of cancer. Glucose homeostasis is reciprocally controlled by the catabolic glycolysis and anabolic gluconeogenesis pathways. Previous studies have mainly focused on catabolic glycolysis, but recently, FBPase, a rate-limiting enzyme in gluconeogenesis, was found to play critical roles in tumour initiation and progression in several cancer types. Here, we review recent ideas and discoveries that illustrate the clinical significance of FBPase expression in various cancers, the mechanism through which FBPase influences cancer, and the mechanism of FBPase silencing. Furthermore, we summarize some of the drugs targeting FBPase and discuss their potential use in clinical applications and the problems that remain unsolved.
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Affiliation(s)
- Gao-Min Liu
- Department of Hepatobiliary Surgery, Meizhou People's Hospital, No. 38 Huangtang Road, Meizhou, 514000 China
| | - Yao-Ming Zhang
- Department of Hepatobiliary Surgery, Meizhou People's Hospital, No. 38 Huangtang Road, Meizhou, 514000 China
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635
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Mardinoglu A, Wu H, Bjornson E, Zhang C, Hakkarainen A, Räsänen SM, Lee S, Mancina RM, Bergentall M, Pietiläinen KH, Söderlund S, Matikainen N, Ståhlman M, Bergh PO, Adiels M, Piening BD, Granér M, Lundbom N, Williams KJ, Romeo S, Nielsen J, Snyder M, Uhlén M, Bergström G, Perkins R, Marschall HU, Bäckhed F, Taskinen MR, Borén J. An Integrated Understanding of the Rapid Metabolic Benefits of a Carbohydrate-Restricted Diet on Hepatic Steatosis in Humans. Cell Metab 2018; 27:559-571.e5. [PMID: 29456073 PMCID: PMC6706084 DOI: 10.1016/j.cmet.2018.01.005] [Citation(s) in RCA: 298] [Impact Index Per Article: 49.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 12/06/2017] [Accepted: 01/10/2018] [Indexed: 02/07/2023]
Abstract
A carbohydrate-restricted diet is a widely recommended intervention for non-alcoholic fatty liver disease (NAFLD), but a systematic perspective on the multiple benefits of this diet is lacking. Here, we performed a short-term intervention with an isocaloric low-carbohydrate diet with increased protein content in obese subjects with NAFLD and characterized the resulting alterations in metabolism and the gut microbiota using a multi-omics approach. We observed rapid and dramatic reductions of liver fat and other cardiometabolic risk factors paralleled by (1) marked decreases in hepatic de novo lipogenesis; (2) large increases in serum β-hydroxybutyrate concentrations, reflecting increased mitochondrial β-oxidation; and (3) rapid increases in folate-producing Streptococcus and serum folate concentrations. Liver transcriptomic analysis on biopsy samples from a second cohort revealed downregulation of the fatty acid synthesis pathway and upregulation of folate-mediated one-carbon metabolism and fatty acid oxidation pathways. Our results highlight the potential of exploring diet-microbiota interactions for treating NAFLD.
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Affiliation(s)
- Adil Mardinoglu
- Science for Life Laboratory, KTH Royal Institute of Technology, Stockholm, Sweden; Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Hao Wu
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Elias Bjornson
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden; Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Cheng Zhang
- Science for Life Laboratory, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Antti Hakkarainen
- HUS Medical Imaging Center, Radiology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Sari M Räsänen
- Research Programs Unit, Diabetes and Obesity, University of Helsinki and Department of Internal Medicine, Helsinki University Hospital, Helsinki, Finland
| | - Sunjae Lee
- Science for Life Laboratory, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Rosellina M Mancina
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Mattias Bergentall
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Kirsi H Pietiläinen
- Research Programs Unit, Diabetes and Obesity, University of Helsinki and Department of Internal Medicine, Helsinki University Hospital, Helsinki, Finland; Endocrinology, Abdominal Center, Helsinki University Hospital, Helsinki, Finland
| | - Sanni Söderlund
- Research Programs Unit, Diabetes and Obesity, University of Helsinki and Department of Internal Medicine, Helsinki University Hospital, Helsinki, Finland
| | - Niina Matikainen
- Research Programs Unit, Diabetes and Obesity, University of Helsinki and Department of Internal Medicine, Helsinki University Hospital, Helsinki, Finland; Endocrinology, Abdominal Center, Helsinki University Hospital, Helsinki, Finland
| | - Marcus Ståhlman
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Per-Olof Bergh
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Martin Adiels
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Brian D Piening
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Marit Granér
- Research Programs Unit, Diabetes and Obesity, University of Helsinki and Department of Internal Medicine, Helsinki University Hospital, Helsinki, Finland
| | - Nina Lundbom
- HUS Medical Imaging Center, Radiology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Kevin J Williams
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Stefano Romeo
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Jens Nielsen
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Michael Snyder
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Mathias Uhlén
- Science for Life Laboratory, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Göran Bergström
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Rosie Perkins
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Hanns-Ulrich Marschall
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Fredrik Bäckhed
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden.
| | - Marja-Riitta Taskinen
- Research Programs Unit, Diabetes and Obesity, University of Helsinki and Department of Internal Medicine, Helsinki University Hospital, Helsinki, Finland
| | - Jan Borén
- Department of Molecular and Clinical Medicine, University of Gothenburg, and Sahlgrenska University Hospital, Gothenburg, Sweden.
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636
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Schmitz-Peiffer C. Anarchy in the UPR: A Ca 2+-insensitive PKC inhibits SERCA activity to promote ER stress. Biosci Rep 2018; 38:BSR20170966. [PMID: 29439143 PMCID: PMC5857902 DOI: 10.1042/bsr20170966] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 02/05/2018] [Accepted: 02/07/2018] [Indexed: 02/04/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is highly prevalent in Western countries, and is linked to the development of liver cancer and Type 2 diabetes (T2D). It is strongly associated with obesity, but the dysregulation of liver lipid storage is not fully understood. Fatty acid oversupply to hepatocytes can establish a vicious cycle involving diminished protein folding, endoplasmic reticulum (ER) stress, insulin resistance and further lipogenesis. This commentary discusses the recent findings of Lai et al. published in Bioscience Reports, that implicate protein kinase C delta (PKCδ) activation by fatty acids in the inhibition of the SERCA Ca2+ pump, resulting in reduced ER Ca2+ loading and protein misfolding. PKCδ therefore represents a target for the treatment of both steatosis and insulin resistance, key to the prevention of NAFLD and T2D.
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Affiliation(s)
- Carsten Schmitz-Peiffer
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, and St Vincents Clinical School, University of New South Wales, Darlinghurst, Sydney, 2010, Australia
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637
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de Oliveira MR. Carnosic Acid as a Promising Agent in Protecting Mitochondria of Brain Cells. Mol Neurobiol 2018; 55:6687-6699. [DOI: 10.1007/s12035-017-0842-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 12/14/2017] [Indexed: 12/21/2022]
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638
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Yamada T, Habara O, Kubo H, Nishimura T. Fat body glycogen serves as a metabolic safeguard for the maintenance of sugar levels in Drosophila. Development 2018; 145:dev.158865. [DOI: 10.1242/dev.158865] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 02/09/2018] [Indexed: 12/26/2022]
Abstract
Adapting to changes in food availability is a central challenge for survival. Glucose is an important resource for energy production, and therefore, many organisms synthesize and retain sugar storage molecules. In insects, glucose is stored in two different forms: the disaccharide trehalose and the branched polymer glycogen. Glycogen is synthesized and stored in several tissues, including in muscle and the fat body. Despite the important role of the fat body as a center for energy metabolism, the importance of its glycogen content remains unclear. Here, we show that glycogen metabolism is regulated in a tissue-specific manner under starvation conditions in the fruit fly Drosophila. The mobilization of fat body glycogen in larvae is independent of adipokinetic hormone (Akh, the glucagon homolog) but is regulated by sugar availability in a tissue-autonomous manner. Fat body glycogen plays a critical role in the maintenance of circulating sugars, including trehalose, under fasting conditions. These results demonstrate the importance of fat body glycogen as a metabolic safeguard in Drosophila.
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Affiliation(s)
- Takayuki Yamada
- Laboratory for Growth Control Signaling, RIKEN Center for Developmental Biology (CDB), 2-2-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Okiko Habara
- Laboratory for Growth Control Signaling, RIKEN Center for Developmental Biology (CDB), 2-2-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Hitomi Kubo
- Laboratory for Growth Control Signaling, RIKEN Center for Developmental Biology (CDB), 2-2-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Takashi Nishimura
- Laboratory for Growth Control Signaling, RIKEN Center for Developmental Biology (CDB), 2-2-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
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639
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Post S, Karashchuk G, Wade JD, Sajid W, De Meyts P, Tatar M. Drosophila Insulin-Like Peptides DILP2 and DILP5 Differentially Stimulate Cell Signaling and Glycogen Phosphorylase to Regulate Longevity. Front Endocrinol (Lausanne) 2018; 9:245. [PMID: 29892262 PMCID: PMC5985746 DOI: 10.3389/fendo.2018.00245] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 05/02/2018] [Indexed: 01/08/2023] Open
Abstract
Insulin and IGF signaling (IIS) is a complex system that controls diverse processes including growth, development, metabolism, stress responses, and aging. Drosophila melanogaster IIS is propagated by eight Drosophila insulin-like peptides (DILPs), homologs of both mammalian insulin and IGFs, with various spatiotemporal expression patterns and functions. DILPs 1-7 are thought to act through a single Drosophila insulin/IGF receptor, InR, but it is unclear how the DILPs thereby mediate a range of physiological phenotypes. We determined the distinct cell signaling effects of DILP2 and DILP5 stimulation upon Drosophila S2 cells. DILP2 and DILP5 induced similar transcriptional patterns but differed in signal transduction kinetics. DILP5 induced sustained phosphorylation of Akt, while DILP2 produced acute, transient Akt phosphorylation. Accordingly, we used phosphoproteomic analysis to identify distinct patterns of non-genomic signaling induced by DILP2 and DILP5. Across all treatments and replicates, 5,250 unique phosphopeptides were identified, representing 1,575 proteins. Among these peptides, DILP2, but not DILP5, dephosphorylated Ser15 on glycogen phosphorylase (GlyP), and DILP2, but not DILP5, was subsequently shown to repress enzymatic GlyP activity in S2 cells. The functional consequences of this difference were evaluated in adult Drosophila dilp mutants: dilp2 null adults have elevated GlyP enzymatic activity relative to wild type, while dilp5 mutants have reduced GlyP activity. In flies with intact insulin genes, GlyP overexpression extended lifespan in a Ser15 phosphorylation-dependent manner. In dilp2 mutants, that are otherwise long-lived, longevity was repressed by expression of phosphonull GlyP that is enzymatically inactive. Overall, DILP2, unlike DILP5, signals to affect longevity in part through its control of phosphorylation to deactivate glycogen phosphorylase, a central modulator of glycogen storage and gluconeogenesis.
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Affiliation(s)
- Stephanie Post
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, United States
- Department of Ecology and Evolutionary Biology, Brown University, Providence, RI, United States
- *Correspondence: Stephanie Post, ; Marc Tatar,
| | - Galina Karashchuk
- Department of Ecology and Evolutionary Biology, Brown University, Providence, RI, United States
| | - John D. Wade
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
- School of Chemistry, University of Melbourne, Melbourne, VIC, Australia
| | | | - Pierre De Meyts
- Department of Cell Signalling, de Duve Institute, Brussels, Belgium
- Department of Stem Cell Research Novo Nordisk A/S, Måløv, Denmark
| | - Marc Tatar
- Department of Ecology and Evolutionary Biology, Brown University, Providence, RI, United States
- *Correspondence: Stephanie Post, ; Marc Tatar,
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640
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Affiliation(s)
- X Charlie Dong
- Department of Biochemistry and Molecular Biology, Center for Diabetes and Metabolic Diseases, Indiana University School of Medicine, Indianapolis, IN
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641
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Lima-Cabello E, Morales-Santana S, León J, Alché V, Clemente A, Alché JD, Jimenez-Lopez JC. Narrow-leafed lupin (Lupinus angustifoliusL.) seed β-conglutins reverse the induced insulin resistance in pancreatic cells. Food Funct 2018; 9:5176-5188. [DOI: 10.1039/c8fo01164h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Narrow-leafed lupin β-conglutin proteins may help to prevent and treat insulin resistance through pleiotropic effects.
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Affiliation(s)
- Elena Lima-Cabello
- Department of Biochemistry
- Cell & Molecular Biology of Plants; Estacion Experimental del Zaidín
- Spanish National Research Council (CSIC)
- Granada E-18008
- Spain
| | - Sonia Morales-Santana
- CIBER of Fragility and Healthy Aging (CIBERFES)
- Endocrinology Unit
- Endocrinology Division
- Biomedical Research Institute of Granada – “IBS.Granada”
- University Hospital San Cecilio
| | - Josefa León
- Clinical Management Unit of Digestive System
- San Cecilio University Hospital
- Biomedical Research Institute of Granada – “IBS.Granada”
- University Hospital San Cecilio
- Granada E-18012
| | - Victor Alché
- Andalusian Health System
- Health Center “Villanueva de las Torres”
- Granada E-18539
- Spain
| | - Alfonso Clemente
- Department of Physiology and Biochemistry of Animal Nutrition; Estacion Experimental del Zaidin
- Spanish National Research Council (CSIC)
- Granada E-18100
- Spain
| | - Juan D. Alché
- Department of Biochemistry
- Cell & Molecular Biology of Plants; Estacion Experimental del Zaidín
- Spanish National Research Council (CSIC)
- Granada E-18008
- Spain
| | - Jose C. Jimenez-Lopez
- Department of Biochemistry
- Cell & Molecular Biology of Plants; Estacion Experimental del Zaidín
- Spanish National Research Council (CSIC)
- Granada E-18008
- Spain
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642
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Ighbariya A, Weiss R. Insulin Resistance, Prediabetes, Metabolic Syndrome: What Should Every Pediatrician Know? J Clin Res Pediatr Endocrinol 2017; 9:49-57. [PMID: 29280741 PMCID: PMC5790325 DOI: 10.4274/jcrpe.2017.s005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The Metabolic syndrome describes a clustering of typical cardiovascular risk factors. The syndrome is also known as "Insulin Resistance syndrome" as a substantial part of the pathophysiology is driven by resistance to the metabolic effects of insulin. The major cause of insulin resistance in childhood is a typical lipid partitioning pattern characterized by increased deposition of lipids within insulin responsive tissues, such as the liver and skeletal muscle and within the viscera. This lipid deposition pattern is also associated with infiltration of intra-abdominal tissues with cells of the immune system, inducing systemic, low-grade inflammation typically observed in insulin resistant obese children and adolescents. Several clues derived from a careful history and physical examination, along with a basic laboratory workup, provide clues in regards to risk stratification in obese children.
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Affiliation(s)
- Ahmad Ighbariya
- Ruth Rappaport Children’s Hospital, Clinic of Pediatrics, Haifa, Israel
,* Address for Correspondence: Ruth Rappaport Children’s Hospital, Clinic of Pediatrics, Haifa, Israel E-mail:
| | - Ram Weiss
- Ruth Rappaport Children’s Hospital, Clinic of Pediatrics, Haifa, Israel
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643
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Ndisang JF, Vannacci A, Rastogi S. Insulin Resistance, Type 1 and Type 2 Diabetes, and Related Complications 2017. J Diabetes Res 2017; 2017:1478294. [PMID: 29279853 PMCID: PMC5723935 DOI: 10.1155/2017/1478294] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 08/13/2017] [Indexed: 12/24/2022] Open
Affiliation(s)
- Joseph Fomusi Ndisang
- Department of Physiology, University of Saskatchewan College of Medicine, 107 Wiggins Road, Saskatoon, SK, Canada S7N 5E5
| | - Alfredo Vannacci
- Department of Neurosciences, Psychology, Drug Research and Child Health Section of Pharmacology and Toxicology, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy
| | - Sharad Rastogi
- The Medical Affairs Company, Cardiovascular, Troy, MI 48085, USA
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