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Kwon Y, Gottmann P, Wang S, Tissink J, Motzler K, Sekar R, Albrecht W, Cadenas C, Hengstler JG, Schürmann A, Zeigerer A. Induction of steatosis in primary human hepatocytes recapitulates key pathophysiological aspects of metabolic dysfunction-associated steatotic liver disease. J Hepatol 2024:S0168-8278(24)02347-X. [PMID: 38977136 DOI: 10.1016/j.jhep.2024.06.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 06/15/2024] [Accepted: 06/29/2024] [Indexed: 07/10/2024]
Abstract
BACKGROUND & AIMS Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most common cause of chronic liver disease. Its limited treatment options warrant novel pre-clinical models for target selection and drug validation. We have established and extensively characterized a primary human steatotic hepatocyte in vitro model system that could guide treatment strategies for MASLD. METHODS Cryopreserved primary human hepatocytes from five donors varying in sex and ethnicity were cultured with free fatty acids (FFA) in 3D collagen sandwich for 7 days and the development of MASLD was followed by assessing classical hepatocellular functions. As proof of concept, the effects of the drug Firsocostat (GS-0976) on in vitro MASLD phenotypes were evaluated. RESULTS Incubation with FFA induced steatosis, insulin resistance, mitochondrial dysfunction, inflammation, and alterations in prominent human gene signatures similar to patients with MASLD, indicating the recapitulation of human MASLD in this system. As the application of Firsocostat rescued clinically observed fatty liver disease pathologies, it highlights the ability of the in vitro system to test drug efficacy and potentially characterize their mode of action. CONCLUSIONS Altogether, our human MASLD in vitro model system could guide the development and validation of novel targets and drugs for the treatment of MASLD. IMPACT AND IMPLICATIONS Due to low drug efficacy and high toxicity, a clinical treatment option for MASLD is limited. To facilitate earlier stop-go decisions in drug development, we have established a primary human steatotic hepatocyte in vitro model. As the model recapitulates clinically relevant MASLD characteristics at high phenotypic resolution, it can serve as a pre-screening platform and guide target identification and validation in MASLD therapy.
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Affiliation(s)
- Yun Kwon
- Institute for Diabetes and Cancer, Helmholtz Center Munich, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Pascal Gottmann
- German Center for Diabetes Research (DZD), Neuherberg, Germany; Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany
| | - Surui Wang
- Institute for Diabetes and Cancer, Helmholtz Center Munich, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Joel Tissink
- Institute for Diabetes and Cancer, Helmholtz Center Munich, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Karsten Motzler
- Institute for Diabetes and Cancer, Helmholtz Center Munich, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Revathi Sekar
- Institute for Diabetes and Cancer, Helmholtz Center Munich, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany
| | - Wiebke Albrecht
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Department of Toxicology, Dortmund, Germany
| | - Cristina Cadenas
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Department of Toxicology, Dortmund, Germany
| | - Jan G Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Department of Toxicology, Dortmund, Germany
| | - Annette Schürmann
- German Center for Diabetes Research (DZD), Neuherberg, Germany; Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany
| | - Anja Zeigerer
- Institute for Diabetes and Cancer, Helmholtz Center Munich, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany; European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany.
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Dobariya P, Xie W, Rao SP, Xie J, Seelig DM, Vince R, Lee MK, More SS. Deletion of Glyoxalase 1 Exacerbates Acetaminophen-Induced Hepatotoxicity in Mice. Antioxidants (Basel) 2024; 13:648. [PMID: 38929087 PMCID: PMC11200933 DOI: 10.3390/antiox13060648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/19/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
Acetaminophen (APAP) overdose triggers a cascade of intracellular oxidative stress events, culminating in acute liver injury. The clinically used antidote, N-acetylcysteine (NAC), has a narrow therapeutic window, and early treatment is essential for a satisfactory therapeutic outcome. For more versatile therapies that can be effective even at late presentation, the intricacies of APAP-induced hepatotoxicity must be better understood. Accumulation of advanced glycation end products (AGEs) and the consequent activation of the receptor for AGEs (RAGE) are considered one of the key mechanistic features of APAP toxicity. Glyoxalase 1 (Glo-1) regulates AGE formation by limiting the levels of methylglyoxal (MEG). In this study, we studied the relevance of Glo-1 in the APAP-mediated activation of RAGE and downstream cell death cascades. Constitutive Glo-1-knockout mice (GKO) and a cofactor of Glo-1, ψ-GSH, were used as tools. Our findings showed elevated oxidative stress resulting from the activation of RAGE and hepatocyte necrosis through steatosis in GKO mice treated with high-dose APAP compared to wild-type controls. A unique feature of the hepatic necrosis in GKO mice was the appearance of microvesicular steatosis as a result of centrilobular necrosis, rather than the inflammation seen in the wild type. The GSH surrogate and general antioxidant ψ-GSH alleviated APAP toxicity irrespective of the Glo-1 status, suggesting that oxidative stress is the primary driver of APAP toxicity. Overall, the exacerbation of APAP hepatotoxicity in GKO mice suggests the importance of this enzyme system in antioxidant defense against the initial stages of APAP overdose.
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Affiliation(s)
- Prakashkumar Dobariya
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (P.D.); (W.X.); (S.P.R.); (J.X.); (R.V.)
| | - Wei Xie
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (P.D.); (W.X.); (S.P.R.); (J.X.); (R.V.)
| | - Swetha Pavani Rao
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (P.D.); (W.X.); (S.P.R.); (J.X.); (R.V.)
| | - Jiashu Xie
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (P.D.); (W.X.); (S.P.R.); (J.X.); (R.V.)
| | - Davis M. Seelig
- Comparative Pathology Shared Resource, Masonic Cancer Center, University of Minnesota, St. Paul, MN 55108, USA;
- College of Veterinary Medicine, University of Minnesota, St. Paul, MN 55108, USA
| | - Robert Vince
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (P.D.); (W.X.); (S.P.R.); (J.X.); (R.V.)
| | - Michael K. Lee
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA;
- Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
| | - Swati S. More
- Center for Drug Design, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA; (P.D.); (W.X.); (S.P.R.); (J.X.); (R.V.)
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Charidemou E, Noberini R, Ghirardi C, Georgiou P, Marcou P, Theophanous A, Strati K, Keun H, Behrends V, Bonaldi T, Kirmizis A. Hyperacetylated histone H4 is a source of carbon contributing to lipid synthesis. EMBO J 2024; 43:1187-1213. [PMID: 38383863 PMCID: PMC10987603 DOI: 10.1038/s44318-024-00053-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 01/12/2024] [Accepted: 01/31/2024] [Indexed: 02/23/2024] Open
Abstract
Histone modifications commonly integrate environmental cues with cellular metabolic outputs by affecting gene expression. However, chromatin modifications such as acetylation do not always correlate with transcription, pointing towards an alternative role of histone modifications in cellular metabolism. Using an approach that integrates mass spectrometry-based histone modification mapping and metabolomics with stable isotope tracers, we demonstrate that elevated lipids in acetyltransferase-depleted hepatocytes result from carbon atoms derived from deacetylation of hyperacetylated histone H4 flowing towards fatty acids. Consistently, enhanced lipid synthesis in acetyltransferase-depleted hepatocytes is dependent on histone deacetylases and acetyl-CoA synthetase ACSS2, but not on the substrate specificity of the acetyltransferases. Furthermore, we show that during diet-induced lipid synthesis the levels of hyperacetylated histone H4 decrease in hepatocytes and in mouse liver. In addition, overexpression of acetyltransferases can reverse diet-induced lipogenesis by blocking lipid droplet accumulation and maintaining the levels of hyperacetylated histone H4. Overall, these findings highlight hyperacetylated histones as a metabolite reservoir that can directly contribute carbon to lipid synthesis, constituting a novel function of chromatin in cellular metabolism.
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Affiliation(s)
- Evelina Charidemou
- Department of Biological Sciences, University of Cyprus, 2109, Nicosia, Cyprus
| | - Roberta Noberini
- Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS, 20139, Milan, Italy
- Department of Oncology and Haematology-Oncology, University of Milano, Via Festa del Perdono 7, 20122, Milano, Italy
| | - Chiara Ghirardi
- Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS, 20139, Milan, Italy
- Department of Oncology and Haematology-Oncology, University of Milano, Via Festa del Perdono 7, 20122, Milano, Italy
| | - Polymnia Georgiou
- Department of Biological Sciences, University of Cyprus, 2109, Nicosia, Cyprus
| | - Panayiota Marcou
- Department of Biological Sciences, University of Cyprus, 2109, Nicosia, Cyprus
| | - Andria Theophanous
- Department of Biological Sciences, University of Cyprus, 2109, Nicosia, Cyprus
| | - Katerina Strati
- Department of Biological Sciences, University of Cyprus, 2109, Nicosia, Cyprus
| | - Hector Keun
- Cancer Metabolism & Systems Toxicology Group, Division of Cancer, Department of Surgery and Cancer, Imperial College London, London, UK
| | - Volker Behrends
- School of Life and Health Sciences, Whitelands College, University of Roehampton, London, UK
| | - Tiziana Bonaldi
- Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS, 20139, Milan, Italy
- Department of Oncology and Haematology-Oncology, University of Milano, Via Festa del Perdono 7, 20122, Milano, Italy
| | - Antonis Kirmizis
- Department of Biological Sciences, University of Cyprus, 2109, Nicosia, Cyprus.
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Du J, Ji X, Xu B, Du Q, Li Y, Zhou B, Liu X, Xu Z, Jiang Y, Kou B, Li Z, Cui C, Lin J. Ubiquitination of cytoplasmic HMGB1 by RNF186 regulates hepatic lipophagy in non-alcoholic fatty liver disease. Metabolism 2024; 152:155769. [PMID: 38158076 DOI: 10.1016/j.metabol.2023.155769] [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] [Received: 08/29/2023] [Revised: 12/20/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Lipophagy is a vital biological process that maintains the balance of intracellular lipid metabolism in nonalcoholic fatty liver disease (NAFLD). However, the precise regulatory mechanism of RNF186 in hepatic lipophagy is still unclear. This study investigates the roles and mechanisms of RNF186 in the regulation of lipophagy during the development of NAFLD. METHODS In this study, we employed RNF186 knockout mice as well as human liver cells and mouse primary hepatocytes (MPHs) to investigate the role and mechanisms of RNF186 in lipophagy during the progression of NAFLD. Additionally, liver specimens from individuals with NAFLD were examined to assess the expression of RNF186 and its associated factors. RESULTS Here, we provide evidence that depletion of RNF186 enhances lipophagy in hepatocytes of a NAFLD model. Mechanistically, RNF186 acts as an E3 ubiquitin ligase that targets cytoplasmic HMGB1 for lysine 48 (K48)- and K63-linked ubiquitination, leading to its subsequent proteasomal degradation. Importantly, the translocation of HMGB1 from the nucleus to the cytoplasm is responsible for inducing lipophagy in NAFLD samples. Knockdown of HMGB1 significantly reduces the activation of lipophagy and mediates the decrease in lipid accumulation caused by RNF186 depletion in hepatocytes. Furthermore, we find that maintaining the nuclear HMGB1 level and inhibiting its nuclear-cytoplasmic shuttling are critical for the proper function of RNF186 in NAFLD. Additionally, the expression of RNF186 and HMGB1 in human NAFLD samples, along with factors related to lipophagy, suggest that RNF186 may play a similar role in the pathogenesis of human fatty liver. CONCLUSION RNF186 deficiency accelerates hepatic lipophagy in NAFLD through the inhibition of ubiquitination and degradation of cytoplasmic HMGB1. Consequently, targeting the RNF186-HMGB1 axis may offer a promising strategy for the prevention and treatment of NAFLD.
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Affiliation(s)
- Jiang Du
- Henan Joint International Research Laboratory of Stem Cell Medicine, School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China; Stem Cells and Biotherapy Engineering Research Center of Henan, National Joint Engineering Laboratory of Stem Cells and Biotherapy, School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China.
| | - Xiang Ji
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Bo Xu
- Henan Joint International Research Laboratory of Stem Cell Medicine, School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China; Stem Cells and Biotherapy Engineering Research Center of Henan, National Joint Engineering Laboratory of Stem Cells and Biotherapy, School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China
| | - Qizhang Du
- Henan Joint International Research Laboratory of Stem Cell Medicine, School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China; Stem Cells and Biotherapy Engineering Research Center of Henan, National Joint Engineering Laboratory of Stem Cells and Biotherapy, School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China
| | - Yujie Li
- Henan Joint International Research Laboratory of Stem Cell Medicine, School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China; Stem Cells and Biotherapy Engineering Research Center of Henan, National Joint Engineering Laboratory of Stem Cells and Biotherapy, School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China
| | - Bing Zhou
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Xinlei Liu
- Laboratory Animal Research Center, Chongqing University School of Medicine, Chongqing, 400044, China
| | - Zhihao Xu
- Henan Joint International Research Laboratory of Stem Cell Medicine, School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China; Stem Cells and Biotherapy Engineering Research Center of Henan, National Joint Engineering Laboratory of Stem Cells and Biotherapy, School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China
| | - Yan Jiang
- School of Nursing, Xinxiang Medical University, Xinxiang 453003, China
| | - Beilin Kou
- First College for Clinical Medicine, Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Zexin Li
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan, China
| | - Chaochu Cui
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Juntang Lin
- Henan Joint International Research Laboratory of Stem Cell Medicine, School of Medical Engineering, Xinxiang Medical University, Xinxiang 453003, China; Stem Cells and Biotherapy Engineering Research Center of Henan, National Joint Engineering Laboratory of Stem Cells and Biotherapy, School of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, China.
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5
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Chiba M, Ohsugi Y, Matsumoto K, Tayama C. Analysis of gene expression changes during lipid droplet formation in HepG2 human liver cancer cells. MEDICINE INTERNATIONAL 2024; 4:7. [PMID: 38283130 PMCID: PMC10811445 DOI: 10.3892/mi.2024.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/12/2023] [Indexed: 01/30/2024]
Abstract
Fatty liver is a condition of excessive triglyceride accumulation in hepatocytes. Additionally, hepatocytes exhibit a high degree of fat droplet accumulation during excessive alcohol consumption and metabolic syndrome. However, the molecular mechanisms involved in fat droplet formation remain unknown. The present study used an in vitro fatty liver formation model of the human liver cancer cell line, HepG2, to comprehensively search for fat droplet formation-related genes, and which exhibit changes in expression during fat droplet formation. Microarray analysis with extracted total RNA determined the genes that are involved in fat droplet formation and their expression was confirmed using quantitative polymerase chain reaction following the culture of the HepG2 cells in culture medium containing 0, 50, 200 and 500 µM of oleic acid for 24 h. The results revealed 142 genes demonstrating increased expression levels by >2.0-fold with oleic acid treatment and 426 genes demonstrating decreased expression levels. Perilipin 2 (PLIN2) was estimated as the gene most closely associated with fatty liver. Lipid droplet formation in the HepG2 cells induced by oleic acid led to the upregulation of PLIN2 in a concentration-dependent manner. On the whole, the findings of the present study indicate the involvement of genes in oleic acid-induced lipid droplet formation in HepG2 cells; PLIN2 in particular may play a crucial role in this process.
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Affiliation(s)
- Mitsuru Chiba
- Department of Bioscience and Laboratory Medicine, Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori 036-8564, Japan
- Research Center for Biomedical Sciences, Hirosaki University, Hirosaki, Aomori 036-8564, Japan
| | - Yuhei Ohsugi
- Department of Medical Technology, School of Health Sciences, Hirosaki University, Hirosaki, Aomori 036-8564, Japan
| | - Kana Matsumoto
- Department of Bioscience and Laboratory Medicine, Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori 036-8564, Japan
| | - Chisa Tayama
- Department of Medical Technology, School of Health Sciences, Hirosaki University, Hirosaki, Aomori 036-8564, Japan
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6
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Niemi NM, Serrano LR, Muehlbauer LK, Balnis CE, Wei L, Smith AJ, Kozul KL, Forny M, Connor OM, Rashan EH, Shishkova E, Schueler KL, Keller MP, Attie AD, Friedman JR, Pagan JK, Coon JJ, Pagliarini DJ. PPTC7 maintains mitochondrial protein content by suppressing receptor-mediated mitophagy. Nat Commun 2023; 14:6431. [PMID: 37833277 PMCID: PMC10575892 DOI: 10.1038/s41467-023-42069-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
PPTC7 is a resident mitochondrial phosphatase essential for maintaining proper mitochondrial content and function. Newborn mice lacking Pptc7 exhibit aberrant mitochondrial protein phosphorylation, suffer from a range of metabolic defects, and fail to survive beyond one day after birth. Using an inducible knockout model, we reveal that loss of Pptc7 in adult mice causes marked reduction in mitochondrial mass and metabolic capacity with elevated hepatic triglyceride accumulation. Pptc7 knockout animals exhibit increased expression of the mitophagy receptors BNIP3 and NIX, and Pptc7-/- mouse embryonic fibroblasts (MEFs) display a major increase in mitophagy that is reversed upon deletion of these receptors. Our phosphoproteomics analyses reveal a common set of elevated phosphosites between perinatal tissues, adult liver, and MEFs, including multiple sites on BNIP3 and NIX, and our molecular studies demonstrate that PPTC7 can directly interact with and dephosphorylate these proteins. These data suggest that Pptc7 deletion causes mitochondrial dysfunction via dysregulation of several metabolic pathways and that PPTC7 may directly regulate mitophagy receptor function or stability. Overall, our work reveals a significant role for PPTC7 in the mitophagic response and furthers the growing notion that management of mitochondrial protein phosphorylation is essential for ensuring proper organelle content and function.
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Affiliation(s)
- Natalie M Niemi
- Morgridge Institute for Research, Madison, WI, 53715, USA.
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Lia R Serrano
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Laura K Muehlbauer
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Catherine E Balnis
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Lianjie Wei
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Andrew J Smith
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Keri-Lyn Kozul
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD, 4072, Australia
| | - Merima Forny
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Olivia M Connor
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Edrees H Rashan
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Evgenia Shishkova
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
- National Center for Quantitative Biology of Complex Systems, Madison, WI, 53706, USA
| | - Kathryn L Schueler
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Mark P Keller
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Alan D Attie
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jonathan R Friedman
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Julia K Pagan
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD, 4072, Australia
- The University of Queensland, Institute for Molecular Bioscience, Brisbane, QLD, 4072, Australia
- The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | - Joshua J Coon
- Morgridge Institute for Research, Madison, WI, 53715, USA
- Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA
- National Center for Quantitative Biology of Complex Systems, Madison, WI, 53706, USA
| | - David J Pagliarini
- Morgridge Institute for Research, Madison, WI, 53715, USA.
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA.
- Department of Genetics, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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7
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Xiong Y, Ma C, Li Q, Zhang W, Zhao H, Ren P, Zhang K, Lei X. Melatonin ameliorates simulated-microgravity-induced mitochondrial dysfunction and lipid metabolism dysregulation in hepatocytes. FASEB J 2023; 37:e23132. [PMID: 37552471 DOI: 10.1096/fj.202301137r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/12/2023] [Accepted: 07/26/2023] [Indexed: 08/09/2023]
Abstract
The liver is an essential multifunctional organ, which constantly communicates with nearly all tissues. It has raised the concern that microgravity exposure can lead to liver dysfunction and metabolic syndromes. However, molecular mechanisms and intervention measures of the adverse effects of microgravity on hepatocytes are limited. In this study, we utilized the random positioning machine culture system to investigate the adverse effects on hepatocytes under simulated microgravity (SMG). Our results showed that SMG impaired hepatocyte viability, causing cell cycle arrest and apoptosis. Compared to normal gravity, it also triggered lipid accumulation, elevated triglyceride (TG) and ROS levels, and impaired mitochondria function in hepatocytes. Furthermore, RNA sequencing results showed that SMG upregulated genes implicated in lipid metabolisms, including PPARγ, PLIN2, CD36, FABPs, etc. Importantly, all these defects can be suppressed by melatonin, a potent antioxidant secreted by the pineal gland, suggesting its potential use of therapeutic intervention.
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Affiliation(s)
- Yue Xiong
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Chiyuan Ma
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Qin Li
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Wenya Zhang
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Huashan Zhao
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Peigen Ren
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Ke Zhang
- Institute of Neurological and Psychiatric Disorders, Shenzhen Bay Laboratory, Shenzhen, China
| | - Xiaohua Lei
- Center for Energy Metabolism and Reproduction, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
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8
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Janilkarn-Urena I, Idrissova A, Zhang M, VanDreal M, Sanghavi N, Skinner SG, Cheng S, Zhang Z, Watanabe J, Asatryan L, Cadenas E, Davies DL. Dihydromyricetin supplementation improves ethanol-induced lipid accumulation and inflammation. Front Nutr 2023; 10:1201007. [PMID: 37680900 PMCID: PMC10481966 DOI: 10.3389/fnut.2023.1201007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/01/2023] [Indexed: 09/09/2023] Open
Abstract
Introduction Excessive alcohol consumption leads to a myriad of detrimental health effects, including alcohol-associated liver disease (ALD). Unfortunately, no available treatments exist to combat the progression of ALD beyond corticosteroid administration and/or liver transplants. Dihydromyricetin (DHM) is a bioactive polyphenol and flavonoid that has traditionally been used in Chinese herbal medicine for its robust antioxidant and anti-inflammatory properties. It is derived from many plants, including Hovenia dulcis and is found as the active ingredient in a variety of popular hangover remedies. Investigations utilizing DHM have demonstrated its ability to alleviate ethanol-induced disruptions in mitochondrial and lipid metabolism, while demonstrating hepatoprotective activity. Methods Female c57BL/6J mice (n = 12/group) were treated using the Lieber DeCarli forced-drinking and ethanol (EtOH) containing liquid diet, for 5 weeks. Mice were randomly divided into three groups: (1) No-EtOH, (2) EtOH [5% (v/v)], and (3) EtOH [5% (v/v)] + DHM (6 mg/mL). Mice were exposed to ethanol for 2 weeks to ensure the development of ALD pathology prior to receiving dihydromyricetin supplementation. Statistical analysis included one-way ANOVA along with Bonferroni multiple comparison tests, where p ≤ 0.05 was considered statistically significant. Results Dihydromyricetin administration significantly improved aminotransferase levels (AST/ALT) and reduced levels of circulating lipids including LDL/VLDL, total cholesterol (free cholesterol), and triglycerides. DHM demonstrated enhanced lipid clearance by way of increased lipophagy activity, shown as the increased interaction and colocalization of p62/SQSTM-1, LC3B, and PLIN-1 proteins. DHM-fed mice had increased hepatocyte-to-hepatocyte lipid droplet (LD) heterogeneity, suggesting increased neutralization and sequestration of free lipids into LDs. DHM administration significantly reduced prominent pro-inflammatory cytokines commonly associated with ALD pathology such as TNF-α, IL-6, and IL-17. Discussion Dihydromyricetin is commercially available as a dietary supplement. The results of this proof-of-concept study demonstrate its potential utility and functionality as a cost-effective and safe candidate to combat inflammation and the progression of ALD pathology.
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Affiliation(s)
- Isis Janilkarn-Urena
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Alina Idrissova
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Mindy Zhang
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Masha VanDreal
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Neysa Sanghavi
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Samantha G. Skinner
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Sydney Cheng
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Zeyu Zhang
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
- Translational Research Lab, USC Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Junji Watanabe
- Translational Research Lab, USC Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Liana Asatryan
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Enrique Cadenas
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
| | - Daryl L. Davies
- Titus Family Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA, United States
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9
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Hammoudeh N, Soukkarieh C, Murphy DJ, Hanano A. Mammalian lipid droplets: structural, pathological, immunological and anti-toxicological roles. Prog Lipid Res 2023; 91:101233. [PMID: 37156444 DOI: 10.1016/j.plipres.2023.101233] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 04/30/2023] [Accepted: 05/05/2023] [Indexed: 05/10/2023]
Abstract
Mammalian lipid droplets (LDs) are specialized cytosolic organelles consisting of a neutral lipid core surrounded by a membrane made up of a phospholipid monolayer and a specific population of proteins that varies according to the location and function of each LD. Over the past decade, there have been significant advances in the understanding of LD biogenesis and functions. LDs are now recognized as dynamic organelles that participate in many aspects of cellular homeostasis plus other vital functions. LD biogenesis is a complex, highly-regulated process with assembly occurring on the endoplasmic reticulum although aspects of the underpinning molecular mechanisms remain elusive. For example, it is unclear how many enzymes participate in the biosynthesis of the neutral lipid components of LDs and how this process is coordinated in response to different metabolic cues to promote or suppress LD formation and turnover. In addition to enzymes involved in the biosynthesis of neutral lipids, various scaffolding proteins play roles in coordinating LD formation. Despite their lack of ultrastructural diversity, LDs in different mammalian cell types are involved in a wide range of biological functions. These include roles in membrane homeostasis, regulation of hypoxia, neoplastic inflammatory responses, cellular oxidative status, lipid peroxidation, and protection against potentially toxic intracellular fatty acids and lipophilic xenobiotics. Herein, the roles of mammalian LDs and their associated proteins are reviewed with a particular focus on their roles in pathological, immunological and anti-toxicological processes.
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Affiliation(s)
- Nour Hammoudeh
- Department of Animal Biology, Faculty of Sciences, University of Damascus, Damascus, Syria
| | - Chadi Soukkarieh
- Department of Animal Biology, Faculty of Sciences, University of Damascus, Damascus, Syria
| | - Denis J Murphy
- School of Applied Sciences, University of South Wales, Pontypridd, CF37 1DL, Wales, United Kingdom..
| | - Abdulsamie Hanano
- Department of Molecular Biology and Biotechnology, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syria..
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10
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Iwiński H, Chodkowska KA, Drabik K, Batkowska J, Karwowska M, Kuropka P, Szumowski A, Szumny A, Różański H. The Impact of a Phytobiotic Mixture on Broiler Chicken Health and Meat Safety. Animals (Basel) 2023; 13:2155. [PMID: 37443953 DOI: 10.3390/ani13132155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/11/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
The purpose of the study was to assess the effects of different doses of a phytobiotic mixture on selected production parameters and meat quality and to assess the residue of the preparation in tissues and the possible toxic effects in broiler chickens. Broiler chicks aged 160 days, divided into four equal groups, were supplemented with the phytobiotic mixture at different doses, D1-0.5 mL/L, D2-1 mL/L, and D3-2 mL/L, four times during a 42-day trial. There were no statistically significant differences in weight gain per week of life and mortality in the birds. The study also demonstrated that the use of the mixture of phytobiotics had no significant effect on colour, pH, WHC, and natural leakage. However, a beneficial effect of the additive was found in the group treated with a dose of 1 mL/L, where less thermal leakage from the meat was demonstrated. Furthermore, significant differences in the change in thigh muscle tenderness were also observed. In the histopathological analysis of the liver no significant differences were observed. In addition, no residues of the mixture or its metabolites were found in the tissues analysed. In conclusion, the proposed scheme of administration of the phytobiotic additive, regardless of the dose, does not cause pathological changes in organs and does not carry the risk of residues of the product in tissues intended for human consumption.
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Affiliation(s)
- Hubert Iwiński
- AdiFeed Sp. z o.o., Opaczewska, 02-201 Warszawa, Poland
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Karolina A Chodkowska
- AdiFeed Sp. z o.o., Opaczewska, 02-201 Warszawa, Poland
- Krzyżanowski Partners Spółka z o.o., Zakładowa 7, 26-670 Pionki, Poland
| | - Kamil Drabik
- Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, ul. Akademicka 13, 20-950 Lublin, Poland
| | - Justyna Batkowska
- Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, ul. Akademicka 13, 20-950 Lublin, Poland
| | - Małgorzata Karwowska
- Department of Meat Technology and Food Quality, University of Life Sciences in Lublin, ul. Skromna 8, 20-704 Lublin, Poland
| | - Piotr Kuropka
- Department of Biostructure and Animal Physiology, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Adam Szumowski
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Antoni Szumny
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Henryk Różański
- AdiFeed Sp. z o.o., Opaczewska, 02-201 Warszawa, Poland
- Laboratory of Industrial and Experimental Biology, Institute for Health and Economics, Carpathian State College in Krosno, Rynek 1, 38-400 Krosno, Poland
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11
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Xu X, Qiu J, Li X, Chen J, Li Y, Huang X, Zang S, Ma X, Liu J. Perilipin5 protects against non-alcoholic steatohepatitis by increasing 11-Dodecenoic acid and inhibiting the occurrence of ferroptosis. Nutr Metab (Lond) 2023; 20:29. [PMID: 37349836 DOI: 10.1186/s12986-023-00751-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 05/31/2023] [Indexed: 06/24/2023] Open
Abstract
BACKGROUND Non-alcoholic steatohepatitis (NASH) is a major contributor to liver cirrhosis and hepatocellular carcinoma. There remains no effective pharmacological therapy. The hepatic lipid metabolism and fatty acid β-oxidation are regulated by Perilipin5 (Plin5). However, it is yet unknown how Plin5 affects NASH and the molecular process. METHODS High-fat, high-cholesterol and high-fructose (HFHC) diets were used to mimic the progression of NASH in wild type (WT) mice and Plin5 knockout (Plin5 KO) mice. The degree of ferroptosis was measured by detecting the expression of key genes of ferroptosis and the level of lipid peroxide. The degree of NASH was judged by observing the morphology of the liver, detecting the expression of inflammation and fibrosis related genes of liver damage. Plin5 was overexpressed in the liver of mice by tail vein injection of adenovirus, and the process of NASH was simulated by methionine choline deficiency (MCD) diet. The occurrence of ferroptosis and NASH was detected by the same detection method. Targeted lipidomics sequencing was used to detect the difference in free fatty acid expression in the WT Plin5 KO group. Finally, it was verified in cell experiments to further study the effect of free fatty acids on ferroptosis of hepatocytes. RESULTS In various NASH models, hepatic Plin5 was dramatically reduced. Plin5 knockout (KO) worsened NASH-associated characteristics in mice given a high-fat/high-cholesterol (HFHC) diet, such as lipid accumulation, inflammation and hepatic fibrosis. It has been shown that ferroptosis is involved in NASH progression. We revealed that Plin5 KO in mice aggravated the degree of ferroptosis in NASH models. Conversely, overexpression of Plin5 significantly alleviated ferroptosis and further ameliorated progression of MCD-induced NASH. Analysis of livers obtained from HFHC diet-fed mice by targeted lipidomics revealed that 11-Dodecenoic acid was significantly decreased in Plin5 KO mice. Addition of 11-Dodecenoia acid to Plin5 knockdown hepatocytes effectively prevented ferroptosis. CONCLUSION Our study demonstrates that Plin5 protects against NASH progression by increasing 11-Dodecenoic acid level and further inhibiting ferroptosis, suggesting that Plin5 has therapeutic potential as a target for the management of NASH.
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Affiliation(s)
- Xinming Xu
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai, 200240, China
| | - Jin Qiu
- Shanghai Key Laboratory of Regulatory Biological, Institute of Biomedical Science, School of Life Science, East China Normal University, Shanghai, 200241, China
| | - Xiaoya Li
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai, 200240, China
| | - Juntong Chen
- Shanghai Key Laboratory of Regulatory Biological, Institute of Biomedical Science, School of Life Science, East China Normal University, Shanghai, 200241, China
| | - Yue Li
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai, 200240, China
| | - Xinmei Huang
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai, 200240, China
| | - Shufei Zang
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai, 200240, China.
| | - Xinran Ma
- Shanghai Key Laboratory of Regulatory Biological, Institute of Biomedical Science, School of Life Science, East China Normal University, Shanghai, 200241, China.
| | - Jun Liu
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, 801 Heqing Road, Shanghai, 200240, China.
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12
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Tang J, Wang L, Shi M, Feng S, Zhang T, Han H. Study on the mechanism of Shuganzhi Tablet against nonalcoholic fatty liver disease and lipid regulation effects of its main substances in vitro. JOURNAL OF ETHNOPHARMACOLOGY 2023:116780. [PMID: 37311504 DOI: 10.1016/j.jep.2023.116780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/30/2023] [Accepted: 06/10/2023] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Shuganzhi Tablet (SGZT) originates from a famous traditional Chinese herbal formula Chaihu Decoction which can be applied to treat liver diseases, however, the pharmacodynamic mechanism of SGZT needs to be evaluated. AIM OF THIS STUDY To study the mechanism of SGZT in the treatment of non-alcoholic fatty liver disease (NAFLD), and screen out its effective ingredients. MATERIALS AND METHODS In this study, firstly, the main components of SGZT were analyzed qualitatively. And a rat model of NAFLD was established by feeding high-fat diet. Serum biochemical indexes and liver pathological analysis were used to evaluate the pharmacodynamic effect of SGZT in the treatment of NAFLD. In order to explore the pharmacodynamic mechanism, proteomics and metabolomics analysis were used. Western blotting was used to verify the expression of important differential proteins. And L02 cells were treated with free fatty acids (FFA) and the main substances of SGZT to establish the cell model of NAFLD in vitro and to reveal the pharmacodynamic substance of SGZT. RESULTS Twelve components were detected in SGZT, and according to the results of serum biochemical indexes and liver pathological analysis, SGZT could effectively treat NAFLD. Combined with the results of bioinformatics analysis, we found that 133 differentially expressed proteins were reversed in liver samples of rats treated with SGZT. The important proteins in PPAR signaling pathway, steroid biosynthesis, cholesterol metabolism and fatty acid metabolism were mainly regulated to maintain cholesterol homeostasis and improve lipid metabolism. SGZT also affected various metabolites in rat liver, including eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and taurine. In addition, the main components contained in SGZT (hesperidin, polydatin, naringin, emodin, specnuezhenide, saikosaponin A) and a metabolite (resveratrol) could significantly reduce FFA-induced intracellular lipid accumulation. CONCLUSION SGZT effectively treated NAFLD, and PPAR-γ, Acsl4, Plin2 and Fads1 may be the main targets of SGZT. And Fads1-EPA/DHA-PPAR-γ may be the potential pharmacodynamic pathway. Cell experiments in vitro revealed that the main components of SGZT and their metabolites, such as hesperidin, polydatin, naringin, emodin, specnuezhenide, saikosaponin A and resveratrol may be the main components of its efficacy. Further research is needed to reveal and validate the pharmacodynamic mechanism.
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Affiliation(s)
- Jie Tang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201210, China.
| | - Lixiang Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201210, China.
| | - Mengge Shi
- Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201210, China.
| | - Shuaixia Feng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201210, China.
| | - Tong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201210, China.
| | - Han Han
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201210, China.
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13
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Yin X, Guo X, Liu Z, Wang J. Advances in the Diagnosis and Treatment of Non-Alcoholic Fatty Liver Disease. Int J Mol Sci 2023; 24:ijms24032844. [PMID: 36769165 PMCID: PMC9917647 DOI: 10.3390/ijms24032844] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/07/2022] [Accepted: 01/10/2023] [Indexed: 02/05/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most prevalent chronic liver disease that affects approximately one-quarter of the global adult population, posing a significant threat to human health with wide-ranging social and economic implications. The main characteristic of NAFLD is considered that the excessive fat is accumulated and deposited in hepatocytes without excess alcohol intake or some other pathological causes. NAFLD is a progressive disease, ranging from steatosis to non-alcoholic steatohepatitis (NASH), cirrhosis, hepatocellular carcinoma, liver transplantation, and death. Therefore, NAFLD will probably emerge as the leading cause of end-stage liver disease in the coming decades. Unlike other highly prevalent diseases, NAFLD has received little attention from the global public health community. Liver biopsy is currently considered the gold standard for the diagnosis and staging of NAFLD because of the absence of noninvasive and specific biomarkers. Due to the complex pathophysiological mechanisms of NAFLD and the heterogeneity of the disease phenotype, no specific pharmacological therapies have been approved for NAFLD at present, although several drugs are in advanced stages of development. This review summarizes the current evidence on the pathogenesis, diagnosis and treatment of NAFLD.
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Affiliation(s)
- Xunzhe Yin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Xiangyu Guo
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Zuojia Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Correspondence: (Z.L.); (J.W.)
| | - Jin Wang
- Department of Chemistry and Physics, Stony Brook University, Stony Brook, New York, NY 11794-3400, USA
- Correspondence: (Z.L.); (J.W.)
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14
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Zheng Y, Shi Y, Yang X, Gao J, Nie Z, Xu G. Effects of resveratrol on lipid metabolism in liver of red tilapia Oreochromis niloticus. Comp Biochem Physiol C Toxicol Pharmacol 2022; 261:109408. [PMID: 35820615 DOI: 10.1016/j.cbpc.2022.109408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/02/2022] [Accepted: 07/06/2022] [Indexed: 11/24/2022]
Abstract
Resveratrol (RES), as a polyphenol natural plant extract, mainly accumulates in the root of Polygonum cuspidatum, which can alleviate liver injury in mammals. Our study aims to explore the effects and potential mechanism of RES on lipid metabolism of red tilapia, and the effects of RES on liver structure, fat synthesis and metabolism of red tilapia were determined. The present study designed four groups named as 8 % fat (8%CK), 10 % fat (10 % HF), 10 % HF + RES and 10 % HF + RES + EX527 (selisistat). The liver tissues of red tilapia were collected at 3 (3 W), 6 (6 W) and 9 (9 W) weeks for parameter determination. Compared to the normal diet group, the hepatocyte of tilapia showed nuclear shift and vacuoles of different sizes when fed a high-fat diet. Meanwhile, the high-fat diet increased the contents of LDL, TC and TG significantly at 6 W, and significantly decreased the content of NAD+ at 9 W. Compared to the high-fat group, the nuclei of tilapia fed with RES were increased and visible, the degree of steatosis and the number of vacuoles were both reduced. At 3/6/9 W, RES significantly decreased the contents of LDL, TG and TMAO, and significantly increased the content of NAD+. A total of 1416 genes were up-regulated and 1928 genes were down-regulated in the group with added RES when compared to the 10 % HF group. The pathways related to lipid metabolism including PPAR signaling pathway have been enriched. Interestingly, the expressions of sirt1, pparα, fabp7 and cpt1b genes were up-regulated in RES diet group, while the expressions of pparγ, me1, scd and lpl genes were down-regulated. After the addition of an inhibitor (EX527), the above indexes showed an opposite trend when compared to the group with added RES. The overall results showed that the high-fat diet could cause fatty liver lesions in the liver of red tilapia, and RES could activate the sirt1 gene, regulate the PPARα/γ pathway and related genes, and thus regulate liver fat synthesis and metabolism leading to the alleviation of damage to liver tissue.
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Affiliation(s)
- Yao Zheng
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, Jiangsu 214081, China; Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, Jiangsu 214081, China
| | - Yulu Shi
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, Jiangsu 214081, China
| | - Xiaoxi Yang
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, Jiangsu 214081, China
| | - Jiancao Gao
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, Jiangsu 214081, China
| | - Zhijuan Nie
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, Jiangsu 214081, China
| | - Gangchun Xu
- Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center (FFRC), Chinese Academy of Fishery Sciences (CAFS), Wuxi, Jiangsu 214081, China; Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, Jiangsu 214081, China.
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15
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Gabbia D, Roverso M, Zanotto I, Colognesi M, Sayaf K, Sarcognato S, Arcidiacono D, Zaramella A, Realdon S, Ferri N, Guido M, Russo FP, Bogialli S, Carrara M, De Martin S. A Nutraceutical Formulation Containing Brown Algae Reduces Hepatic Lipid Accumulation by Modulating Lipid Metabolism and Inflammation in Experimental Models of NAFLD and NASH. Mar Drugs 2022; 20:572. [PMID: 36135761 PMCID: PMC9501409 DOI: 10.3390/md20090572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 08/30/2022] [Accepted: 09/05/2022] [Indexed: 01/08/2023] Open
Abstract
Recently, some preclinical and clinical studies have demonstrated the ability of brown seaweeds in reducing the risk factors for metabolic syndrome. Here, we analyzed the beneficial effect of a nutraceutical formulation containing a phytocomplex extracted from seaweeds and chromium picolinate in animal models of liver steatosis of differing severities (rats with non-alcoholic fatty liver disease (NAFLD) and its complication, non-alcoholic steatohepatitis (NASH)). This treatment led to a significant drop in hepatic fat deposition in both models (p < 0.01 vs. untreated animals), accompanied by a reduction in plasma inflammatory cytokines, such as interleukin 6, tumor necrosis factor α, and C reactive protein, and myeloperoxidase expression in liver tissue. Furthermore, a modulation of the molecular pathways involved in lipid metabolism and storage was demonstrated, since we observed the significant reduction of the mRNA levels of fatty acid synthase, diacylglycerol acyltransferases, the sterol-binding protein SREBP-1, and the lipid transporter perilipin-2, in both treated NAFLD and NASH rats in comparison to untreated ones. In conclusion, this nutraceutical product was effective in reducing liver steatosis and showed further beneficial effects on hepatic inflammation and glycemic control, which were particularly evident in rats characterized by a more severe condition, thus representing a therapeutic option for the treatment of NAFLD and NASH patients.
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Affiliation(s)
- Daniela Gabbia
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Marco Roverso
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Ilaria Zanotto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Martina Colognesi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Katia Sayaf
- Department of Surgery, Oncology and Gastroenterology, University of Padova, 35131 Padova, Italy
| | - Samantha Sarcognato
- Department of Pathology, Azienda ULSS2 Marca Trevigiana, 31100 Treviso, Italy
| | - Diletta Arcidiacono
- Gastroenterology Unit, Veneto Institute of Oncology IOV-IRCCS, 35131 Padova, Italy
| | - Alice Zaramella
- Department of Surgery, Oncology and Gastroenterology, University of Padova, 35131 Padova, Italy
- Gastroenterology Unit, Veneto Institute of Oncology IOV-IRCCS, 35131 Padova, Italy
| | - Stefano Realdon
- Gastroenterology Unit, Veneto Institute of Oncology IOV-IRCCS, 35131 Padova, Italy
| | - Nicola Ferri
- Department of Medicine, University of Padova, 35131 Padova, Italy
| | - Maria Guido
- Department of Pathology, Azienda ULSS2 Marca Trevigiana, 31100 Treviso, Italy
- Department of Medicine, University of Padova, 35131 Padova, Italy
| | - Francesco Paolo Russo
- Department of Surgery, Oncology and Gastroenterology, University of Padova, 35131 Padova, Italy
| | - Sara Bogialli
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Maria Carrara
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Sara De Martin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
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16
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Plin5 Bidirectionally Regulates Lipid Metabolism in Oxidative Tissues. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:4594956. [PMID: 35401929 PMCID: PMC8989587 DOI: 10.1155/2022/4594956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 10/08/2021] [Accepted: 03/16/2022] [Indexed: 11/20/2022]
Abstract
Cytoplasmic lipid droplets (LDs) can store neutral lipids as an energy source when needed and also regulate the key metabolic processes of intracellular lipid accumulation, which is associated with several metabolic diseases. The perilipins (Plins) are a family of proteins that associate with the surface of LDs. As a member of Plins superfamily, perilipin 5 (Plin5) coats LDs in cardiomyocytes, which is significantly related to reactive oxygen species (ROS) production originated from mitochondria in the heart, consequently determining the progression of diabetic cardiomyopathy. Plin5 may play a bidirectional function in lipid metabolism which is in a state of dynamic balance. In the basic state, Plin5 inhibited the binding of comparative gene identification-58 (CGI-58) to adipose triglyceride lipase (ATGL) by binding CGI-58, thus inhibiting lipolysis. However, when the body is under stress (such as cold, fasting, exercise, and other stimuli), protein kinase A (PKA) phosphorylates and activates Plin5, which then causes Plin5 to release the binding site of CGI-58 and ATGL, prompting CGI-58 to bind to ATGL and activate ATGL activity, thus accelerating the lipolysis process, revealing the indispensable role of Plin5 in lipid turnover. Here, the purpose of this review is to summarize the present understanding of the bidirectional regulation role of Plin5 in oxidative tissues and to reveal its potential role in diabetic cardiomyopathy protection.
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Chen X, Wu T, Gong Z, Guo J, Liu X, Zhang Y, Li Y, Ferraro P, Li B. Lipid droplets as endogenous intracellular microlenses. LIGHT, SCIENCE & APPLICATIONS 2021; 10:242. [PMID: 34873142 PMCID: PMC8648767 DOI: 10.1038/s41377-021-00687-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 10/31/2021] [Accepted: 11/23/2021] [Indexed: 05/24/2023]
Abstract
Using a single biological element as a photonic component with well-defined features has become a new intriguing paradigm in biophotonics. Here we show that endogenous lipid droplets in the mature adipose cells can behave as fully biocompatible microlenses to strengthen the ability of microscopic imaging as well as detecting intra- and extracellular signals. By the assistance of biolenses made of the lipid droplets, enhanced fluorescence imaging of cytoskeleton, lysosomes, and adenoviruses has been achieved. At the same time, we demonstrated that the required excitation power can be reduced by up to 73%. The lipidic microlenses are finely manipulated by optical tweezers in order to address targets and perform their real-time imaging inside the cells. An efficient detecting of fluorescence signal of cancer cells in extracellular fluid was accomplished due to the focusing effect of incident light by the lipid droplets. The lipid droplets acting as endogenous intracellular microlenses open the intriguing route for a multifunctional biocompatible optics tool for biosensing, endoscopic imaging, and single-cell diagnosis.
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Affiliation(s)
- Xixi Chen
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China
| | - Tianli Wu
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China
| | - Zhiyong Gong
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China
| | - Jinghui Guo
- Department of Physiology, School of Medicine, Jinan University, 510632, Guangzhou, China
| | - Xiaoshuai Liu
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China
| | - Yao Zhang
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China.
| | - Yuchao Li
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China.
| | - Pietro Ferraro
- CNR-ISASI, Institute of Applied Sciences and Intelligent Systems «E. Caianiello», Via Campi Flegrei 34, 80078, Pozzuoli, Naples, Italy.
| | - Baojun Li
- Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China.
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Ryyti R, Pemmari A, Peltola R, Hämäläinen M, Moilanen E. Effects of Lingonberry ( Vaccinium vitis-idaea L.) Supplementation on Hepatic Gene Expression in High-Fat Diet Fed Mice. Nutrients 2021; 13:3693. [PMID: 34835949 PMCID: PMC8623941 DOI: 10.3390/nu13113693] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 10/08/2021] [Accepted: 10/09/2021] [Indexed: 02/06/2023] Open
Abstract
The prevalence of nonalcoholic fatty liver disease (NAFLD) is growing worldwide in association with Western-style diet and increasing obesity. Lingonberry (Vaccinium vitis-idaea L.) is rich in polyphenols and has been shown to attenuate adverse metabolic changes in obese liver. This paper investigated the effects of lingonberry supplementation on hepatic gene expression in high-fat diet induced obesity in a mouse model. C57BL/6N male mice were fed for six weeks with either a high-fat (HF) or low-fat (LF) diet (46% and 10% energy from fat, respectively) or HF diet supplemented with air-dried lingonberry powder (HF + LGB). HF diet induced a major phenotypic change in the liver, predominantly affecting genes involved in inflammation and in glucose and lipid metabolism. Lingonberry supplementation prevented the effect of HF diet on an array of genes (in total on 263 genes) associated particularly with lipid or glucose metabolic process (such as Mogat1, Plin4, Igfbp2), inflammatory/immune response or cell migration (such as Lcn2, Saa1, Saa2, Cxcl14, Gcp1, S100a10) and cell cycle regulation (such as Cdkn1a, Tubb2a, Tubb6). The present results suggest that lingonberry supplementation prevents HF diet-induced adverse changes in the liver that are known to predispose the development of NAFLD and its comorbidities. The findings encourage carrying out human intervention trials to confirm the results, with the aim of recommending the use of lingonberries as a part of healthy diet against obesity and its hepatic and metabolic comorbidities.
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Affiliation(s)
- Riitta Ryyti
- The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland; (R.R.); (A.P.); (M.H.)
| | - Antti Pemmari
- The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland; (R.R.); (A.P.); (M.H.)
| | - Rainer Peltola
- Natural Resources Institute Finland, Bioeconomy and Environment, 96200 Rovaniemi, Finland;
| | - Mari Hämäläinen
- The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland; (R.R.); (A.P.); (M.H.)
| | - Eeva Moilanen
- The Immunopharmacology Research Group, Faculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, 33014 Tampere, Finland; (R.R.); (A.P.); (M.H.)
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19
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Cao C, Sun S, Li J, Song C, Meng Q, Shi B, Shan A. Lycopene modulates lipid metabolism in rats and their offspring under a high-fat diet. Food Funct 2021; 12:8960-8975. [PMID: 34378595 DOI: 10.1039/d1fo01039e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The purpose of this study was to investigate the effects of lycopene supplementation on lipid metabolism in rats and their offspring. The experiment was conducted on 60 female rats divided into four groups: normal diet, normal diet with 200 mg kg-1 lycopene, high-fat diet, and high-fat diet with 200 mg kg-1 lycopene. The plasma levels of TG, LDL-C, AST and ALT in female rats fed a high-fat diet were significantly increased (P < 0.05). Lycopene supplementation reduced the plasma TG, LEP and AST levels (P < 0.05). In addition, the activity of ACC and mRNA expression of SREBP1c, FAS, PPARγ, CPT1, HMGCR, ACC, PLIN1 and FATP1 in the liver were also increased after feeding a high-fat diet (P < 0.05), whereas the expression of HSL was decreased (P < 0.05). Lycopene increased the activity of HSL and the expression of ATGL in the liver (P < 0.05), and the activity of ACC and mRNA expression of HMGCR and ACC were decreased (P < 0.05). For the offspring, maternal feeding of a high-fat diet reduced the plasma HDL-C levels (P < 0.05), but lycopene supplementation reduced the plasma TC levels (P < 0.05). Maternal high-fat diet also decreased the activity of HSL and the expression of CD36, PLIN1 and FATP1 in the liver while increasing the expression of PPARγ (P < 0.05). Maternal lycopene supplementation decreased the activities of ACC and FAS in the liver and decreased the expression of PPARγ, ACC and PLIN1 (P < 0.05). Maternal feeding of a high-fat diet increased the level of oxidative stress in the liver, the level of blood lipids in plasma and the rate of lipid production in the liver of rats and their offspring. Maternal lycopene supplementation can reduce the level of oxidative stress in rats and their offspring, reduce the level of blood lipids in plasma, and also reduce the rate of lipid production in the liver of rats and offspring.
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Affiliation(s)
- Chunyu Cao
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
| | - Shishuai Sun
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
| | - Jibo Li
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
| | - Chunsheng Song
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
| | - Qingwei Meng
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
| | - Baoming Shi
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, 150030, P. R. China.
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20
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Guo C, Xue Y, Sun D, Yin Y, Hu F, Mao S. Transcriptome profiling of hepatic and renal mRNAs and lncRNAs under a nutritional restriction during pregnancy in a sheep model. Genomics 2021; 113:2769-2779. [PMID: 34147634 DOI: 10.1016/j.ygeno.2021.06.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 06/12/2021] [Accepted: 06/15/2021] [Indexed: 11/25/2022]
Abstract
This study aimed to investigate the transcriptome profiles of liver and kidney in pregnant sheep under a nutritional restriction. Twenty Hu sheep were segregated into control group (CON) and severe feed restriction (FR) group. Results showed that the concentration of insulin decreased, whereas glucagon, epinephrine, and norepinephrine increased in the FR group. Histological morphology showed no apparent difference in terms of fat deposition in the kidney. In addition, FR significantly decreased the hepatic gene expression of gluconeogenic genes. However, in the kidney, the relative mRNA expression levels of gluconeogenic genes and glucose transporter 1 were observed to increase while the mRNA expression of sodium-glucose co-transporter 1 were decreased by FR. The differentially expressed genes in the liver were associated with fatty acid metabolism and inflammation. In the kidney, FR mainly activated the gluconeogenesis improving negative energy balance. These results provide a better understanding of the consequences of starvation during pregnancy.
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Affiliation(s)
- Changzheng Guo
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, Nanjing Agricultural University, Nanjing 210095, China; National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, China; National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University, Nanjing 210095, China
| | - Yanfeng Xue
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, Nanjing Agricultural University, Nanjing 210095, China; National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, China; National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University, Nanjing 210095, China
| | - Daming Sun
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, Nanjing Agricultural University, Nanjing 210095, China; National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, China; National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuyang Yin
- Huzhou Academy of Agricultural Sciences, Huzhou 313000, China
| | - Fan Hu
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, Nanjing Agricultural University, Nanjing 210095, China; National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, China; National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University, Nanjing 210095, China
| | - Shengyong Mao
- Laboratory of Gastrointestinal Microbiology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal Health, Nanjing Agricultural University, Nanjing 210095, China; National Experimental Teaching Demonstration Center of Animal Science, Nanjing Agricultural University, Nanjing 210095, China; National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; Joint International Research Laboratory of Animal Health and Food Safety, Nanjing Agricultural University, Nanjing 210095, China.
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21
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Zhou J, Yu Y, Ding L, Xu P, Wang Y. Matcha Green Tea Alleviates Non-Alcoholic Fatty Liver Disease in High-Fat Diet-Induced Obese Mice by Regulating Lipid Metabolism and Inflammatory Responses. Nutrients 2021; 13:nu13061950. [PMID: 34204055 PMCID: PMC8226714 DOI: 10.3390/nu13061950] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 12/14/2022] Open
Abstract
Lately, matcha green tea has gained popularity as a beverage and food additive. It has proved to be effective in preventing obesity and related metabolic syndromes. However, the underlying mechanisms of its control effects against non-alcoholic fatty liver disease (NAFLD) are complicated and remain elusive. In the present study, we performed an in vivo experiment using male C57BL/6 mice fed with a high-fat diet and simultaneously treated with matcha for six weeks. Serum biochemical parameters, histological changes, lipid accumulation, inflammatory cytokines, and relevant indicators were examined. Dietary supplementation of matcha effectively prevented excessive accumulation of visceral and hepatic lipid, elevated blood glucose, dyslipidemia, abnormal liver function, and steatosis hepatitis. RNA sequencing analyses of differentially expressed genes in liver samples indicated that matcha treatment decreased the activity of lipid droplet-associated proteins and increased the activity of cytochrome P450 enzymes, suggesting improved metabolic capacity and liver function. The current study provided evidence for new dietary strategies based on matcha supplementation to ameliorate lipotoxicity-induced obesity and NALFD.
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22
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Maheshwari G, Wen G, Gessner DK, Ringseis R, Lochnit G, Eder K, Zorn H, Timm T. Tandem mass tag-based proteomics for studying the effects of a biotechnologically produced oyster mushroom against hepatic steatosis in obese Zucker rats. J Proteomics 2021; 242:104255. [PMID: 33957313 DOI: 10.1016/j.jprot.2021.104255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/22/2021] [Accepted: 04/28/2021] [Indexed: 12/12/2022]
Abstract
Hepatic steatosis is a very common response to liver injury and often attributed to metabolic disorders. Prior studies have demonstrated the efficacy of a biotechnologically produced oyster mushroom (Pleurotus sajor-caju, PSC) in alleviating hepatic steatosis in obese Zucker rats. This study aims to elucidate molecular events underlying the anti-steatotic effects of PSC. Tandem mass tag (TMT) peptide labeling coupled with LC-MS/MS/MS was used to quantify and compare proteins in the livers of lean Zucker rats fed a control diet (LC), obese Zucker rats fed the same control diet (OC) and obese Zucker rats fed the control diet supplemented with 5% PSC (OPSC) for 4 weeks. Using this technique 3128 proteins could be quantified, out of which 108 were differentially abundant between the OPSC and OC group. Functional enrichment analysis of the up-regulated proteins showed that these proteins were mainly involved in metabolic processes, while the down-regulated proteins were involved in inflammatory processes. Results from proteomic analysis were successfully validated for two up-regulated (carbonic anhydrase 3, regucalcin) and two down-regulated (cadherin-17, ceruloplasmin) proteins by means of immunoblotting. SIGNIFICANCE: Valorization of low-grade agricultural waste by edible fungi, such as the mushroom Pleurotus sajor-caju (PSC), represents a promising strategy for the production of protein rich biomass since they boast of a unique enzyme system that has the ability to recover nutrients and energy from biodegradable waste. Herein, we describe the metabolic effects of PSC feeding using a combined quantitative proteomics and bioinformatics approach. In total, 108 proteins were identified to be regulated by PSC feeding in the liver of the obese rats. Complementary usage of a bioinformatics approach allowed us to decipher the mechanisms underlying the recently observed lipid-lowering and anti-inflammatory activity of PSC feeding in obese Zucker rats, namely a reduction of fatty acid synthesis, an improvement of hepatoprotective mechanisms and an enhancement of anti-inflammatory effects.
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Affiliation(s)
- Garima Maheshwari
- Institute of Food Chemistry and Food Biotechnology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany; Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Gaiping Wen
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Denise K Gessner
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Robert Ringseis
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Günter Lochnit
- Protein Analytics, Institute of Biochemistry, Faculty of Medicine, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Klaus Eder
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Holger Zorn
- Institute of Food Chemistry and Food Biotechnology, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany; Fraunhofer Institute for Molecular Biology and Applied Ecology, Ohlebergsweg 12, 35392 Giessen, Germany.
| | - Thomas Timm
- Protein Analytics, Institute of Biochemistry, Faculty of Medicine, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
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23
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Kalyesubula M, Mopuri R, Asiku J, Rosov A, Yosefi S, Edery N, Bocobza S, Moallem U, Dvir H. High-dose vitamin B1 therapy prevents the development of experimental fatty liver driven by overnutrition. Dis Model Mech 2021; 14:dmm.048355. [PMID: 33608323 PMCID: PMC7988776 DOI: 10.1242/dmm.048355] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/11/2021] [Indexed: 12/16/2022] Open
Abstract
Fatty liver is an abnormal metabolic condition of excess intrahepatic fat. This condition, referred to as hepatic steatosis, is tightly associated with chronic liver disease and systemic metabolic morbidity. The most prevalent form in humans, i.e. non-alcoholic fatty liver, generally develops due to overnutrition and sedentary lifestyle, and has as yet no approved drug therapy. Previously, we have developed a relevant large-animal model in which overnourished sheep raised on a high-calorie carbohydrate-rich diet develop hyperglycemia, hyperinsulinemia, insulin resistance, and hepatic steatosis. Here, we tested the hypothesis that treatment with thiamine (vitamin B1) can counter the development of hepatic steatosis driven by overnutrition. Remarkably, the thiamine-treated animals presented with completely normal levels of intrahepatic fat, despite consuming the same amount of liver-fattening diet. Thiamine treatment also decreased hyperglycemia and increased the glycogen content of the liver, but it did not improve insulin sensitivity, suggesting that steatosis can be addressed independently of targeting insulin resistance. Thiamine increased the catalytic capacity for hepatic oxidation of carbohydrates and fatty acids. However, at gene-expression levels, more-pronounced effects were observed on lipid-droplet formation and lipidation of very-low-density lipoprotein, suggesting that thiamine affects lipid metabolism not only through its known classic coenzyme roles. This discovery of the potent anti-steatotic effect of thiamine may prove clinically useful in managing fatty liver-related disorders.This article has an associated First Person interview with the joint first authors of the paper.
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Affiliation(s)
- Mugagga Kalyesubula
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel.,Department of Animal Science, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Ramgopal Mopuri
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel
| | - Jimmy Asiku
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel.,Institute of Biochemistry, Food Science and Nutrition, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Alexander Rosov
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel
| | - Sara Yosefi
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel
| | - Nir Edery
- Pathology Laboratory, Kimron Veterinary Institute, Veterinary Services, Rishon LeZion 50250, Israel
| | - Samuel Bocobza
- Institute of Plant Sciences, Volcani Center - ARO, Rishon LeZion 7528809, Israel
| | - Uzi Moallem
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel
| | - Hay Dvir
- Institute of Animal Science, Volcani Center - Agricultural Research Organization (ARO), Rishon LeZion 7528809, Israel
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Vishnyakova TG, Bocharov AV, Baranova IN, Kurlander R, Drake SK, Chen Z, Amar M, Sviridov D, Vaisman B, Poliakov E, Remaley AT, Eggerman TL, Patterson AP. SR-BI mediates neutral lipid sorting from LDL to lipid droplets and facilitates their formation. PLoS One 2020; 15:e0240659. [PMID: 33057430 PMCID: PMC7561250 DOI: 10.1371/journal.pone.0240659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 09/30/2020] [Indexed: 12/30/2022] Open
Abstract
SR-BI binds various lipoproteins, including HDL, LDL as well as VLDL, and mediates selective cholesteryl ester (CE) uptake. HDL derived CE accumulates in cellular lipid droplets (LDs), which also store triacylglycerol (TAG). We hypothesized that SR-BI could significantly facilitate LD formation, in part, by directly transporting LDL derived neutral lipids (NL) such as CE and TAG into LDs without lipolysis and de novo lipid synthesis. SR-BI overexpression greatly increased LDL uptake and LD formation in stably transfected HeLa cells (SR-BI-HeLa). LDs isolated from SR-BI-HeLa contained 4- and 7-times more CE and TAG, respectively, than mock-transfected HeLa (Mock-HeLa). In contrast, LDL receptor overexpression in HeLa (LDLr-HeLa) greatly increased LDL uptake, degradation with moderate 1.5- and 2-fold increases of CE and TAG, respectively. Utilizing CE and TAG analogs, BODIPY-TAG (BP-TAG) and BODIPY-CE (BP-CE), for tracking LDL NL, we found that after initial binding of LDL to SR-BI-HeLa, apoB remained at the cell surface, while BP-CE and BP-TAG were sorted and simultaneously transported together to LDs. Both lipids demonstrated limited internalization to lysosomes or endoplasmic reticulum in SR-BI-HeLa. In LDLr-HeLa, NLs demonstrated clear lysosomal sequestration without their sorting to LDs. An inhibition of TAG and CE de novo synthesis by 90-95% only reduced TAG and CE LD content by 45-50%, and had little effect on BP-CE and BP-TAG transport to LDs in SR-BI HeLa. Furthermore, intravenous infusion of 1-2 mg of LDL increased liver LDs in normal (WT) but not in SR-BI KO mice. Mice transgenic for human SR-BI demonstrated higher liver LD accumulation than WT mice. Finally, Electro Spray Infusion Mass Spectrometry (ESI-MS) using deuterated d-CE found that LDs accumulated up to 40% of unmodified d-CE LDL. We conclude that SR-BI mediates LDL-induced LD formation in vitro and in vivo. In addition to cytosolic NL hydrolysis and de novo lipid synthesis, this process includes selective sorting and transport of LDL NL to LDs with limited lysosomal NL sequestration and the transport of LDL CE, and TAG directly to LDs independently of de novo synthesis.
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Affiliation(s)
- Tatyana G. Vishnyakova
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
| | - Alexander V. Bocharov
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
- * E-mail:
| | - Irina N. Baranova
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
| | - Roger Kurlander
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
| | - Steven K. Drake
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
| | - Zhigang Chen
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
| | - Marcelo Amar
- National Heart, Lung and Blood Institute, Bethesda, Maryland, United
States of America
| | - Denis Sviridov
- National Heart, Lung and Blood Institute, Bethesda, Maryland, United
States of America
| | - Boris Vaisman
- National Heart, Lung and Blood Institute, Bethesda, Maryland, United
States of America
| | - Eugenia Poliakov
- National Eye Institute, Bethesda, Maryland, United States of
America
| | - Alan T. Remaley
- National Heart, Lung and Blood Institute, Bethesda, Maryland, United
States of America
| | - Thomas L. Eggerman
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
- National Institute of Diabetes, Digestive and Kidney Diseases, Bethesda,
Maryland, United States of America
| | - Amy P. Patterson
- Clinical Center, The National Institutes of Health, Bethesda, Maryland,
United States of America
- National Heart, Lung and Blood Institute, Bethesda, Maryland, United
States of America
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25
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Bromodomain-containing protein 4 regulates a cascade of lipid-accumulation-related genes at the transcriptional level in the 3T3-L1 white adipocyte-like cell line. Eur J Pharmacol 2020; 883:173351. [PMID: 32650006 DOI: 10.1016/j.ejphar.2020.173351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 06/05/2020] [Accepted: 07/03/2020] [Indexed: 11/20/2022]
Abstract
Our previous study demonstrated that the transfection of a short hairpin (sh)RNA targeting bromodomain-containing protein 4 (BRD4), a member of the bromodomain and extra-terminal (BET) family of proteins, into 3T3-L1 cells, a white adipocyte-like cell line, reduced the expression of insulin sensitivity genes, such as Adipoq, Fabp4, Lpl, Slc2a4 and Dgat1, and that BRD4 directly bound to the Adipoq, Slc2a4 and Lpl genes. In the present study, we aimed to identify other target genes of BRD4 by microarray analysis of Brd4 shRNA- and control shRNA-transfected cells. We found that the expression of many genes related to fat metabolism, and particularly those involved in fat accumulation in the glycolytic pathway, tricarboxylic acid cycle, and triacylglycerol synthesis, such as Dgat2, Gpd1, Acsl1, Pnpla2, Pgkfb3, Pcx, Fasn, Acacb and Cidec, was reduced by Brd4 shRNA transfection 2 and 8 days after the end of adipocyte differentiation. The binding of BRD4 at the 2-day and histone acetylation at the 8-day time point, in the vicinity of the Dgat2, Gpd1, Acsl1 and Cidec genes, was also reduced by Brd4 shRNA transduction. Treatment with low doses (10-100 nM) of the BET family inhibitor (+)-JQ-1 for 2, 4 or 8 days also reduced the expression of Dgat2, Gpd1, Fasn, Acab, Acsl1, Pnpla2 and Cidec in 3T3-L1 white adipocyte-like cells. These results indicate that BRD4 regulates the expression of numerous genes involved in lipid accumulation at the transcriptional level in a white adipocyte-like cell line.
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Herrera-Marcos LV, Sancho-Knapik S, Gabás-Rivera C, Barranquero C, Gascón S, Romanos E, Martínez-Beamonte R, Navarro MA, Surra JC, Arnal C, García-de-Jalón JA, Rodríguez-Yoldi MJ, Tena-Sempere M, Sánchez-Ramos C, Monsalve M, Osada J. Pgc1a is responsible for the sex differences in hepatic Cidec/Fsp27β mRNA expression in hepatic steatosis of mice fed a Western diet. Am J Physiol Endocrinol Metab 2020; 318:E249-E261. [PMID: 31846369 DOI: 10.1152/ajpendo.00199.2019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Hepatic fat-specific protein 27 [cell death-inducing DNA fragmentation effector protein C (Cidec)/Fsp27] mRNA levels have been associated with hepatic lipid droplet extent under certain circumstances. To address its hepatic expression under different dietary conditions and in both sexes, apolipoprotein E (Apoe)-deficient mice were subjected to different experimental conditions for 11 wk to test the influence of cholesterol, Western diet, squalene, oleanolic acid, sex, and surgical castration on Cidec/Fsp27 mRNA expression. Dietary cholesterol increased hepatic Cidec/Fsp27β expression, an effect that was suppressed when cholesterol was combined with saturated fat as represented by Western diet feeding. Using the latter diet, neither oleanolic acid nor squalene modified its expression. Females showed lower levels of hepatic Cidec/Fsp27β expression than males when they were fed Western diets, a result that was translated into a lesser amount of CIDEC/FSP27 protein in lipid droplets and microsomes. This was also confirmed in low-density lipoprotein receptor (Ldlr)-deficient mice. Incubation with estradiol resulted in decreased Cidec/Fsp27β expression in AML12 cells. Whereas male surgical castration did not modify the expression, ovariectomized females did show increased levels compared with control females. Females also showed increased expression of peroxisome proliferator-activated receptor-γ coactivator 1-α (Pgc1a), suppressed by ovariectomy, and the values were significantly and inversely associated with those of Cidec/Fsp27β. When Pgc1a-deficient mice were used, the sex differences in Cidec/Fsp27β expression disappeared. Therefore, hepatic Cidec/Fsp27β expression has a complex regulation influenced by diet and sex hormonal milieu. The mRNA sex differences are controlled by Pgc1a.
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Affiliation(s)
- Luis V Herrera-Marcos
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
| | - Sara Sancho-Knapik
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
| | - Clara Gabás-Rivera
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Cristina Barranquero
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Sonia Gascón
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Eduardo Romanos
- Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
| | - Roberto Martínez-Beamonte
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - María A Navarro
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Joaquín C Surra
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Departamento de Producción Animal y Ciencia de los Alimentos, Escuela Politécnica Superior de Huesca Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Huesca, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Carmen Arnal
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Departamento de Patología Animal, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - José A García-de-Jalón
- Departamento de Patología Animal, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
| | - María J Rodríguez-Yoldi
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Departamento de Farmacología y Fisiología, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Manuel Tena-Sempere
- Departamento de Biología Celular, Fisiología e Inmunología, Universidad de Córdoba e Instituto Maimónides de Investigación Biomédica de Córdoba, Córdoba, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Cristina Sánchez-Ramos
- Instituto de Investigaciones Biomedicas "Alberto Sols," Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Madrid, Spain
| | - María Monsalve
- Instituto de Investigaciones Biomedicas "Alberto Sols," Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Madrid, Spain
| | - Jesús Osada
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Veterinaria, Instituto de Investigación Sanitaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Instituto Agroalimentario de Aragón, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Universidad de Zaragoza, Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
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Hodson L, Gunn PJ. The regulation of hepatic fatty acid synthesis and partitioning: the effect of nutritional state. Nat Rev Endocrinol 2019; 15:689-700. [PMID: 31554932 DOI: 10.1038/s41574-019-0256-9] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is an increasing global public health burden. NAFLD is strongly associated with type 2 diabetes mellitus, obesity and cardiovascular disease and begins with intrahepatic triacylglycerol accumulation. Under healthy conditions, the liver regulates lipid metabolism to meet systemic energy needs in the fed and fasted states. The processes of fatty acid uptake, fatty acid synthesis and the intracellular partitioning of fatty acids into storage, oxidation and secretion pathways are tightly regulated. When one or more of these processes becomes dysregulated, excess lipid accumulation can occur. Although genetic and environmental factors have been implicated in the development of NAFLD, it remains unclear why an imbalance in these pathways begins. The regulation of fatty acid partitioning occurs at several points, including during triacylglycerol synthesis, lipid droplet formation and lipolysis. These processes are influenced by enzyme function, intake of dietary fats and sugars and whole-body metabolism, and are further affected by the presence of obesity or insulin resistance. Insight into how the liver controls fatty acid metabolism in health and how these processes might be affected in disease would offer the potential for new therapeutic treatments for NAFLD to be developed.
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Affiliation(s)
- Leanne Hodson
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Headington, Oxford, UK.
- Oxford NIHR Biomedical Research Centre, Churchill Hospital, Headington, Oxford, UK.
| | - Pippa J Gunn
- Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Headington, Oxford, UK
- Oxford NIHR Biomedical Research Centre, Churchill Hospital, Headington, Oxford, UK
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Auclair N, Patey N, Melbouci L, Ou Y, Magri-Tomaz L, Sané A, Garofalo C, Levy E, St-Pierre DH. Acylated Ghrelin and The Regulation of Lipid Metabolism in The Intestine. Sci Rep 2019; 9:17975. [PMID: 31784591 PMCID: PMC6884495 DOI: 10.1038/s41598-019-54265-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 11/05/2019] [Indexed: 01/01/2023] Open
Abstract
Acylated ghrelin (AG) is a gastrointestinal (GI) peptide mainly secreted by the stomach that promotes cytosolic lipid droplets (CLD) hypertrophy in adipose tissues and liver. However, the role of AG in the regulation of lipid metabolism in the intestine remains unexplored. This study aimed at determining whether AG influences CLD production and chylomicron (CM) secretion in the intestine. The effects of AG and oleic acid on CLD accumulation and CM secretion were first investigated in cultured Caco-2/15 enterocytes. Intestinal lipid metabolism was also studied in Syrian Golden Hamsters submitted to conventional (CD) or Western (WD) diets for 8 weeks and continuously administered with AG or physiological saline for the ultimate 2 weeks. In cultured Caco-2/15 enterocytes, CLD accumulation influenced CM secretion while AG reduced fatty acid uptake. In WD hamsters, continuous AG treatment amplified chylomicron output while reducing postprandial CLD accumulation in the intestine. The present study supports the intimate relationship between CLD accumulation and CM secretion in the intestine and it underlines the importance of further characterizing the mechanisms through which AG exerts its effects on lipid metabolism in the intestine.
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Affiliation(s)
- N Auclair
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada.,Department of Exercise Science, University of Quebec in Montreal (UQAM), Montreal, H2X 1Y4, Quebec, Canada
| | - N Patey
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada
| | - L Melbouci
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada.,Department of Exercise Science, University of Quebec in Montreal (UQAM), Montreal, H2X 1Y4, Quebec, Canada
| | - Y Ou
- Department of Exercise Science, University of Quebec in Montreal (UQAM), Montreal, H2X 1Y4, Quebec, Canada
| | - L Magri-Tomaz
- Department of Exercise Science, University of Quebec in Montreal (UQAM), Montreal, H2X 1Y4, Quebec, Canada
| | - A Sané
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada
| | - C Garofalo
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada
| | - E Levy
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada.,Department of Nutrition, University of Montreal, Montreal, H3T 1A8, Quebec, Canada.,Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, G1V 0A6, Quebec, Canada
| | - D H St-Pierre
- CHU Sainte-Justine Research Center, University of Montreal, Montreal, H3T 1C5, Quebec, Canada. .,Department of Nutrition, University of Montreal, Montreal, H3T 1A8, Quebec, Canada. .,Department of Exercise Science, University of Quebec in Montreal (UQAM), Montreal, H2X 1Y4, Quebec, Canada. .,Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, G1V 0A6, Quebec, Canada.
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Hidalgo I, Nájera N, Meaney E, Pérez-Durán J, Valdespino-Vazquez Y, Villarreal F, Ceballos G. Effects of (-)-epicatechin on the time course of the expression of perilipins in a diet-induced model of nonalcoholic steatohepatitis. J Nutr Biochem 2019; 77:108296. [PMID: 32007822 DOI: 10.1016/j.jnutbio.2019.108296] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 10/30/2019] [Accepted: 11/07/2019] [Indexed: 12/25/2022]
Abstract
The existing treatments for nonalcoholic steatohepatitis (NASH) are not completely effective. The need for new alternatives without adverse effects and low cost, such as the flavonoid (-)-epicatechin (EC), which has beneficial effects on lipid metabolism and cardiovascular diseases, arises. The objective of this work was to analyze EC effects in the NASH induced by a Paigen-type diet (PD). Mice were administered with (1) normal chow and water, (2) PD + fructose 30% and (3) PD + fructose 30% + EC (1 mg/kg) per gavage during 9 weeks. At the end of each treatment, serum was collected for analysis of the biochemical profile and liver enzymes. The liver was collected for microscopic analysis and for the evaluation of the relative expression of Plin2, Plin3, CD36, adiponectin and UCP2. Results showed that EC reduced weight gain and decreased triglyceride (TG), low-density lipoprotein cholesterol, TG/high-density lipoprotein and the activity of liver enzymes (alanine aminotransferase and alkaline phosphatase), suggesting lower liver damage. The microscopic analysis showed less "balloonization" of the hepatocyte, small drops of lipids, less accumulation of collagen and infiltration of inflammatory cells as compared to nontreated group. Finally, a decrease in the expression of Plin 2 was observed. While CD36 decreased, adiponectin and UCP2 increased. In conclusion, EC improves the biochemical profile, the microscopic characteristics and protein expression. Therefore, it may be a possible therapeutic approach for NASH since it prevents the progression of the hepatic and metabolic damage induced by high-fat diets.
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Affiliation(s)
- Isabel Hidalgo
- Seccion de Posgrado, Escuela Superior de Medicina, Instituto Politecnico Nacional, Salvador Díaz Mirón esq. Plan de San Luis S/N, Miguel Hidalgo, Casco de Santo Tomas, 11340 Ciudad de Mexico, CDMX
| | - Nayelli Nájera
- Seccion de Posgrado, Escuela Superior de Medicina, Instituto Politecnico Nacional, Salvador Díaz Mirón esq. Plan de San Luis S/N, Miguel Hidalgo, Casco de Santo Tomas, 11340 Ciudad de Mexico, CDMX
| | - Eduardo Meaney
- Seccion de Posgrado, Escuela Superior de Medicina, Instituto Politecnico Nacional, Salvador Díaz Mirón esq. Plan de San Luis S/N, Miguel Hidalgo, Casco de Santo Tomas, 11340 Ciudad de Mexico, CDMX
| | - Javier Pérez-Durán
- Laboratorio de Genetica y Genomica humana, Instituto Nacional de Perinatologia, Montes Urales 800, Lomas Virreyes, Lomas de Chapultepec, 11000 Ciudad de Mexico, CDMX
| | - Yolotzin Valdespino-Vazquez
- Anatomia Patologica. Instituto Nacional de Perinatologia, Montes Urales 800, Lomas Virreyes, Lomas de Chapultepec, 11000 Ciudad de Mexico, CDMX
| | - Francisco Villarreal
- Department of Medicine, School of Medicine, University of California, San Diego, La Jolla, CA
| | - Guillermo Ceballos
- Seccion de Posgrado, Escuela Superior de Medicina, Instituto Politecnico Nacional, Salvador Díaz Mirón esq. Plan de San Luis S/N, Miguel Hidalgo, Casco de Santo Tomas, 11340 Ciudad de Mexico, CDMX.
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30
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Bhushan B, Banerjee S, Paranjpe S, Koral K, Mars WM, Stoops JW, Orr A, Bowen WC, Locker J, Michalopoulos GK. Pharmacologic Inhibition of Epidermal Growth Factor Receptor Suppresses Nonalcoholic Fatty Liver Disease in a Murine Fast-Food Diet Model. Hepatology 2019; 70:1546-1563. [PMID: 31063640 DOI: 10.1002/hep.30696] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 04/29/2019] [Indexed: 12/13/2022]
Abstract
Epidermal growth factor receptor (EGFR) is a critical regulator of hepatocyte proliferation and liver regeneration. Our recent work indicated that EGFR can also regulate lipid metabolism during liver regeneration after partial hepatectomy. Based on these findings, we investigated the role of EGFR in a mouse model of nonalcoholic fatty liver disease (NAFLD) using a pharmacological inhibition strategy. C57BL6/J mice were fed a chow diet or a fast-food diet (FFD) with or without EGFR inhibitor (canertinib) for 2 months. EGFR inhibition completely prevented development of steatosis and liver injury in this model. In order to study if EGFR inhibition can reverse NAFLD progression, mice were fed the FFD for 5 months, with or without canertinib treatment for the last 5 weeks of the study. EGFR inhibition remarkably decreased steatosis, liver injury, and fibrosis and improved glucose tolerance. Microarray analysis revealed that ~40% of genes altered by the FFD were differentially expressed after EGFR inhibition and, thus, are potentially regulated by EGFR. Several genes and enzymes related to lipid metabolism (particularly fatty acid synthesis and lipolysis), which were disrupted by the FFD, were found to be modulated by EGFR. Several crucial transcription factors that play a central role in regulating these lipid metabolism genes during NAFLD, including peroxisome proliferator-activated receptor gamma (PPARγ), sterol regulatory element-binding transcription factor 1 (SREBF1), carbohydrate-responsive element-binding protein, and hepatocyte nuclear factor 4 alpha, were also found to be modulated by EGFR. In fact, chromatin immunoprecipitation analysis revealed that PPARγ binding to several crucial lipid metabolism genes (fatty acid synthase, stearoyl-coenzyme A desaturase 1, and perilipin 2) was drastically reduced by EGFR inhibition. Further upstream, EGFR inhibition suppressed AKT signaling, which is known to control these transcription factors, including PPARγ and SREBF1, in NAFLD models. Lastly, the effect of EGFR in FFD-induced fatty-liver phenotype was not shared by receptor tyrosine kinase MET, investigated using MET knockout mice. Conclusion: Our study revealed a role of EGFR in NAFLD and the potential of EGFR inhibition as a treatment strategy for NAFLD.
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Affiliation(s)
- Bharat Bhushan
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Swati Banerjee
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Shirish Paranjpe
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Kelly Koral
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Wendy M Mars
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - John W Stoops
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Anne Orr
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - William C Bowen
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Joseph Locker
- Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA
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Liebig M, Dannenberger D, Vollmar B, Abshagen K. Endogenously increased n-3 PUFA levels in fat-1 transgenic mice do not protect from non-alcoholic steatohepatitis. Hepatobiliary Surg Nutr 2019; 8:447-458. [PMID: 31673534 DOI: 10.21037/hbsn.2019.04.03] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease worldwide, ranging from simple steatosis to non-alcoholic steatohepatitis (NASH) and fibrosis. Possible reasons for the NAFLD epidemic in industrialized countries are the high intake of pro-inflammatory n-6 polyunsaturated fatty acids (n-6 PUFAs) and low consumption of healthy n-3 PUFAs. Due to their anti-inflammatory properties, n-3 PUFAs may have the potential to alleviate chronic liver disease. Herein, we examined the therapeutic effect of increased n-3 PUFA tissue levels in fat-1 transgenic mice on progressive NASH. Methods Disease was induced in mice by streptozotocin and high fat diet (STZ/HFD) resulting in NASH. NAFLD in 6 and 8 weeks old wild type and fat-1 transgenic STZ/HFD treated mice was analyzed. Unlike all other mammals, fat-1 transgenic mice ubiquitously express an n-3 fatty acid desaturase, which converts n-6 to n-3 PUFAs, leading to increased n-3 and decreased n-6 PUFA tissue contents. Results Liver damage, NAFLD activity score (NAS), hepatic lipid accumulation and inflammation were significantly reduced in fat-1 transgenic STZ/HFD treated mice in the early (6 weeks) but not late (8 weeks) phase of NASH. Simultaneously, mRNA expression of genes involved in fatty acid uptake and storage (Cd36 and Plin3, respectively) was significantly down-regulated in 6 week old but not 8 week old fat-1 transgenic STZ/HFD treated mice. Conclusions Endogenously elevated n-3 PUFA levels in fat-1 transgenic mice transiently delay the onset of STZ/HFD induced NASH but failed to efficiently protect from NASH development.
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Affiliation(s)
- Marie Liebig
- Rudolf-Zenker-Institute for Experimental Surgery, University Medicine Rostock, 18057 Rostock, Germany
| | - Dirk Dannenberger
- Institute of Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology (FBN), 18196 Dummerstorf, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, University Medicine Rostock, 18057 Rostock, Germany
| | - Kerstin Abshagen
- Rudolf-Zenker-Institute for Experimental Surgery, University Medicine Rostock, 18057 Rostock, Germany
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32
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Tang P, Low HB, Png CW, Torta F, Kumar JK, Lim HY, Zhou Y, Yang H, Angeli V, Shabbir A, Tai ES, Flavell RA, Dong C, Wenk MR, Yang DY, Zhang Y. Protective Function of Mitogen-Activated Protein Kinase Phosphatase 5 in Aging- and Diet-Induced Hepatic Steatosis and Steatohepatitis. Hepatol Commun 2019; 3:748-762. [PMID: 31168510 PMCID: PMC6546013 DOI: 10.1002/hep4.1324] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 01/19/2019] [Indexed: 01/09/2023] Open
Abstract
Nonalcoholic fatty liver disease is currently the most common liver disease and is a leading cause of liver-related morbidity and mortality. However, its pathogenesis remains largely unclear. We previously showed that mice deficient in mitogen-activated protein kinase (MAPK) phosphatase 5 (MKP5) spontaneously developed insulin resistance and glucose intolerance, which are associated with visceral obesity and adipose tissue inflammation. In this study, we discovered that mice deficient in MKP5 developed more severe hepatic steatosis and steatohepatitis with age or with feeding on a high-fat diet (HFD) compared to wild-type (WT) mice, and this was associated with increased expression of proinflammatory cytokines and collagen genes. Increased p38 activation in MKP5 knockout (KO) liver compared to that in WT liver was detected, which contributed to increased expression of lipid droplet-associated protein cell death-inducing DFF45-like effector A (CIDEA) and CIDEC/fat-specific protein 27 but not CIDEB through activating transcription factor 2 (ATF2). In addition, MKP5 KO liver had higher peroxisome proliferator-activated receptor gamma (PPARγ) expression compared with WT liver. On the other hand, overexpression of MKP5 or inhibition of p38 activation in hepatocytes resulted in reduced expression of PPARγ. Inhibition of p38 resulted in alleviation of hepatic steatosis in KO liver in response to HFD feeding, and this was associated with reduced expression of CIDEA, CIDEC, and proinflammatory cytokines. Conclusion: MKP5 prevents the development of nonalcoholic steatohepatitis by suppressing p38-ATF2 and p38-PPARγ to reduce hepatic lipid accumulation, inflammation, and fibrosis.
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Affiliation(s)
- Peng Tang
- Department of Microbiology and ImmunologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Immunology Program, Life Sciences InstituteNational University of SingaporeSingapore
| | - Heng Boon Low
- Department of Microbiology and ImmunologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Immunology Program, Life Sciences InstituteNational University of SingaporeSingapore
| | - Chin Wen Png
- Department of Microbiology and ImmunologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Immunology Program, Life Sciences InstituteNational University of SingaporeSingapore
| | - Federico Torta
- Department of BiochemistryYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Singapore Lipidomics Incubator, Life Sciences InstituteNational University of SingaporeSingapore
| | - Jaspal Kaur Kumar
- Singapore Lipidomics Incubator, Life Sciences InstituteNational University of SingaporeSingapore
| | - Hwee Ying Lim
- Department of Microbiology and ImmunologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Immunology Program, Life Sciences InstituteNational University of SingaporeSingapore
| | - Yi Zhou
- Cancer Science Institute of SingaporeYong Loo Lin School of Medicine, National University of SingaporeSingapore
| | - Henry Yang
- Cancer Science Institute of SingaporeYong Loo Lin School of Medicine, National University of SingaporeSingapore
| | - Veronique Angeli
- Department of Microbiology and ImmunologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Immunology Program, Life Sciences InstituteNational University of SingaporeSingapore
| | - Asim Shabbir
- Department of MedicineYong Loo Lin School of Medicine, National University of SingaporeSingapore
| | - E. Shyong Tai
- Department of MedicineYong Loo Lin School of Medicine, National University of SingaporeSingapore
| | - Richard A. Flavell
- Department of ImmunobiologyHoward Hughes Medical Institute, Yale UniversityNew HavenCT
| | | | - Markus R. Wenk
- Department of BiochemistryYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Singapore Lipidomics Incubator, Life Sciences InstituteNational University of SingaporeSingapore
| | - Dan Yock Yang
- Department of MedicineYong Loo Lin School of Medicine, National University of SingaporeSingapore
| | - Yongliang Zhang
- Department of Microbiology and ImmunologyYong Loo Lin School of Medicine, National University of SingaporeSingapore
- Immunology Program, Life Sciences InstituteNational University of SingaporeSingapore
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Bildirici I, Schaiff WT, Chen B, Morizane M, Oh SY, O’Brien M, Sonnenberg-Hirche C, Chu T, Barak Y, Nelson DM, Sadovsky Y. PLIN2 Is Essential for Trophoblastic Lipid Droplet Accumulation and Cell Survival During Hypoxia. Endocrinology 2018; 159:3937-3949. [PMID: 30351430 PMCID: PMC6240902 DOI: 10.1210/en.2018-00752] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 10/17/2018] [Indexed: 12/12/2022]
Abstract
Trophoblast hypoxia and injury, key components of placental dysfunction, are associated with fetal growth restriction and other complications of pregnancy. Accumulation of lipid droplets has been found in hypoxic nonplacental cells. Unique to pregnancy, lipid accumulation in the placenta might perturb lipid transport to the fetus. We tested the hypothesis that hypoxia leads to accumulation of lipid droplets in human trophoblasts and that trophoblastic PLIN proteins play a key role in this process. We found that hypoxia promotes the accumulation of lipid droplets in primary human trophoblasts. A similar accretion of lipid droplets was found in placental villi in vivo from pregnancies complicated by fetal growth restriction. In both situations, these changes were associated with an increased level of cellular triglycerides. Exposure of trophoblasts to hypoxia led to reduced fatty acid efflux and oxidation with no change in fatty acid uptake or synthesis. We further found that hypoxia markedly stimulated PLIN2 mRNA synthesis and protein expression, which colocalized to lipid droplets. Knockdown of PLIN2, but not PLIN3, enhanced trophoblast apoptotic death, and overexpression of PLIN2 promoted cell viability. Collectively, our data indicate that hypoxia enhances trophoblastic lipid retention in the form of lipid droplets and that PLIN2 plays a key role in this process and in trophoblast defense against apoptotic death. These findings also imply that this protective mechanism may lead to diminished trafficking of lipids to the developing fetus.
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Affiliation(s)
- Ibrahim Bildirici
- Department of Obstetrics and Gynecology, Washington University, St. Louis, Missouri
| | - W Timothy Schaiff
- Department of Obstetrics and Gynecology, Washington University, St. Louis, Missouri
| | - Baosheng Chen
- Department of Obstetrics and Gynecology, Washington University, St. Louis, Missouri
| | - Mayumi Morizane
- Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Soo-Young Oh
- Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Matthew O’Brien
- Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
| | | | - Tianjiao Chu
- Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Yaacov Barak
- Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - D Michael Nelson
- Department of Obstetrics and Gynecology, Washington University, St. Louis, Missouri
| | - Yoel Sadovsky
- Magee-Womens Research Institute, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania
- Correspondence: Yoel Sadovsky, MD, Magee-Womens Research Institute, 204 Craft Avenue, Pittsburgh, Pennsylvania 15213. E-mail:
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34
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Shigiyama F, Kumashiro N, Tsuneoka Y, Igarashi H, Yoshikawa F, Kakehi S, Funato H, Hirose T. Mechanisms of sleep deprivation-induced hepatic steatosis and insulin resistance in mice. Am J Physiol Endocrinol Metab 2018; 315:E848-E858. [PMID: 29989853 DOI: 10.1152/ajpendo.00072.2018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Sleep deprivation is associated with increased risk for type 2 diabetes mellitus. However, the underlying mechanisms of sleep deprivation-induced glucose intolerance remain elusive. The aim of this study was to investigate the mechanisms of sleep deprivation-induced glucose intolerance in mice with a special focus on the liver. We established a mouse model of sleep deprivation-induced glucose intolerance using C57BL/6J male mice. A single 6-h sleep deprivation by the gentle handling method under fasting condition induced glucose intolerance. Hepatic glucose production assessed by a pyruvate challenge test was significantly increased, as was hepatic triglyceride content (by 67.9%) in the sleep deprivation group, compared with freely sleeping control mice. Metabolome and microarray analyses were used to evaluate hepatic metabolites and gene expression levels and to determine the molecular mechanisms of sleep deprivation-induced hepatic steatosis. Hepatic metabolites, such as acetyl coenzyme A, 3β-hydroxybutyric acid, and certain acylcarnitines, were significantly increased in the sleep deprivation group, suggesting increased lipid oxidation in the liver. In contrast, fasted sleep-deprived mice showed that hepatic gene expression levels of elongation of very long chain fatty acids-like 3, lipin 1, perilipin 4, perilipin 5, and acyl-CoA thioesterase 1, which are known to play lipogenic roles, were 2.7, 4.5, 3.7, 2.9, and 2.8 times, respectively, those of the fasted sleeping control group, as assessed by quantitative RT-PCR. Sleep deprivation-induced hepatic steatosis and hepatic insulin resistance seem to be mediated through upregulation of hepatic lipogenic enzymes.
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Affiliation(s)
- Fumika Shigiyama
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Toho University Graduate School of Medicine , Tokyo , Japan
| | - Naoki Kumashiro
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Toho University Graduate School of Medicine , Tokyo , Japan
| | - Yousuke Tsuneoka
- Department of Anatomy, Toho University Graduate School of Medicine , Tokyo , Japan
| | - Hiroyuki Igarashi
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Toho University Graduate School of Medicine , Tokyo , Japan
| | - Fukumi Yoshikawa
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Toho University Graduate School of Medicine , Tokyo , Japan
| | - Saori Kakehi
- Department of Metabolism and Endocrinology, Juntendo University Graduate School of Medicine , Tokyo , Japan
- Sportology Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hiromasa Funato
- Department of Anatomy, Toho University Graduate School of Medicine , Tokyo , Japan
| | - Takahisa Hirose
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Toho University Graduate School of Medicine , Tokyo , Japan
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35
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Madushani Herath KHIN, Cho J, Kim A, Eom TK, Kim JS, Kim JB, Doh YH, Jee Y. Phenolic acid and flavonoid-rich fraction of Sasa quelpaertensis Nakai leaves prevent alcohol induced fatty liver through AMPK activation. JOURNAL OF ETHNOPHARMACOLOGY 2018; 224:335-348. [PMID: 29906537 DOI: 10.1016/j.jep.2018.06.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/08/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Sasa quelpaertensis Nakai is an edible dwarf bamboo cultivated mainly in Jeju Island, South Korea and its leaf displays various health-promoting properties including antioxidant scavenging. AIM OF THE STUDY In this study, we aimed at elucidating its hepatoprotective effect against alcohol-induced fatty liver. METHODS In in vitro study, we evaluated the cytotoxicity and hepatoprotective effect of different solvent fractions (aqua, butanol, chloroform, ethyl acetate and hexane) of 80% EtOH extract of S. quelpaertensis Nakai leaf. In vivo experiment performed using binge alcohol consumption model. RESULTS Although all five fractions (0-1000 µg/mL) were non-cytotoxic to HepG2 cells, only ethyl acetate fraction (SQEA), rich in phenolic acids such as p-coumaric acid and flavonoids particularly myristin, showed hepatoprotective effect against EtOH (400 mM) in HepG2 cells. Furthermore, SQEA significantly decreased the ethanol induced cell death and enhanced the cell proliferation. In in vivo experiment using binge consumption model (5 g of EtOH/kg body weight in every 12 h for 3 times), SQEA treatment (10, 50 and 100 mg/kg) markedly reduced the alcohol induced histopathological changes and serum EtOH content, and reversed the reduction of glutathione level in ethanol challenged livers. Further, it suppressed the expression of cytochrome P450 2E1 (CYP2E1). In particular, SQEA activated AMP activated protein kinase (AMPK) pathway, and decreased the expression of tumor necrosis factor receptor-1 (TNFR1), which attenuated lipogenesis via decreased expression of fatty acid synthase (FAS). Inhibited lipogenesis due to SQEA treatment directed towards decreased perilipin-2 expression. These results indicate that SQEA has hypolipidemic effect which is mediated by decreased oxidative stress, increased fatty acid oxidation response and decreased lipogenesis. CONCLUSION Our results suggest the possibility of developing SQEA as a natural hepatoprotective agent potent in attenuating alcohol-induced fatty liver.
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Affiliation(s)
| | - Jinhee Cho
- Department of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University, Jeju 63243, Republic of Korea.
| | - Areum Kim
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 63243, Republic of Korea.
| | - Tae Kil Eom
- Subtropical/Tropical Organism Gene Bank, SARI, Jeju National University, Jeju 63243, Republic of Korea.
| | - Ju-Sung Kim
- Majors in Plant Resource and Environment, College of Agriculture and Life Sciences, SARI, Jeju National University, Jeju 63243, Republic of Korea.
| | - Jae-Bum Kim
- Korea Institute of Industrial Technology, Republic of Korea.
| | - Yang Hoi Doh
- Department of Electronic Engineering, Jeju National University, Jeju 63243, Republic of Korea.
| | - Youngheun Jee
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 63243, Republic of Korea; Department of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University, Jeju 63243, Republic of Korea.
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36
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Tiefenbach J, Magomedova L, Liu J, Reunov AA, Tsai R, Eappen NS, Jockusch RA, Nislow C, Cummins CL, Krause HM. Idebenone and coenzyme Q 10 are novel PPARα/γ ligands, with potential for treatment of fatty liver diseases. Dis Model Mech 2018; 11:11/9/dmm034801. [PMID: 30171034 PMCID: PMC6177011 DOI: 10.1242/dmm.034801] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/03/2018] [Indexed: 12/22/2022] Open
Abstract
Current peroxisome proliferator-activated receptor (PPAR)-targeted drugs, such as the PPARγ-directed diabetes drug rosiglitazone, are associated with undesirable side effects due to robust agonist activity in non-target tissues. To find new PPAR ligands with fewer toxic effects, we generated transgenic zebrafish that can be screened in high throughput for new tissue-selective PPAR partial agonists. A structural analog of coenzyme Q10 (idebenone) that elicits spatially restricted partial agonist activity for both PPARα and PPARγ was identified. Coenzyme Q10 was also found to bind and activate both PPARs in a similar fashion, suggesting an endogenous role in relaying the states of mitochondria, peroxisomes and cellular redox to the two receptors. Testing idebenone in a mouse model of type 2 diabetes revealed the ability to reverse fatty liver development. These findings indicate new mechanisms of action for both PPARα and PPARγ, and new potential treatment options for nonalcoholic fatty liver disease (NAFLD) and steatosis. This article has an associated First Person interview with the first author of the paper. Summary: A zebrafish screen identifies a novel PPARα/γ ligand, idebenone, with potential for treatment of fatty liver diseases, as seen by testing it in a mouse model of type 2 diabetes.
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Affiliation(s)
- Jens Tiefenbach
- University of Toronto, Donnelly Ctr., 160 College St, Toronto, ON M5S 3E1, Canada .,InDanio Bioscience Inc., 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Lilia Magomedova
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, 144 College St, University of Toronto, Toronto, ON M5S 3M2, Canada
| | - Jiabao Liu
- University of Toronto, Donnelly Ctr., 160 College St, Toronto, ON M5S 3E1, Canada
| | - Arkadiy A Reunov
- InDanio Bioscience Inc., 160 College Street, Toronto, ON M5S 3E1, Canada
| | - Ricky Tsai
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, 144 College St, University of Toronto, Toronto, ON M5S 3M2, Canada
| | - Neena S Eappen
- Department of Chemistry, 80 St George St, University of Toronto, Toronto, ON M5S 3H4, Canada
| | - Rebecca A Jockusch
- Department of Chemistry, 80 St George St, University of Toronto, Toronto, ON M5S 3H4, Canada
| | - Corey Nislow
- The University of British Columbia, Faculty of Pharmaceutical Sciences, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Carolyn L Cummins
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, 144 College St, University of Toronto, Toronto, ON M5S 3M2, Canada
| | - Henry M Krause
- University of Toronto, Donnelly Ctr., 160 College St, Toronto, ON M5S 3E1, Canada .,InDanio Bioscience Inc., 160 College Street, Toronto, ON M5S 3E1, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
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37
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Kramer DA, Quiroga AD, Lian J, Fahlman RP, Lehner R. Fasting and refeeding induces changes in the mouse hepatic lipid droplet proteome. J Proteomics 2018; 181:213-224. [DOI: 10.1016/j.jprot.2018.04.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 04/10/2018] [Accepted: 04/14/2018] [Indexed: 12/29/2022]
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38
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Jia Y, Yee JK, Wang C, Nikolaenko L, Diaz-Arjonilla M, Cohen JN, French SW, Liu PY, Lue Y, Lee WNP, Swerdloff RS. Testosterone protects high-fat/low-carbohydrate diet-induced nonalcoholic fatty liver disease in castrated male rats mainly via modulating endoplasmic reticulum stress. Am J Physiol Endocrinol Metab 2018; 314:E366-E376. [PMID: 28928235 PMCID: PMC5966753 DOI: 10.1152/ajpendo.00124.2017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We previously showed that testosterone (T) deficiency enhanced high-fat/low-carbohydrate diet (HFD)-induced hepatic steatosis in rats independent of insulin resistance and that T replacement reduced hepatic macrovesicular fat accumulation and inflammation. The present report explores the mechanism of T's protective effects on HFD-induced steatohepatitis. Adult male rats were randomized into four treatment groups for 15 wk: intact rats on regular chow diet or HFD, and castrated rats on HFD with or without T replacement. Fatty acid β-oxidation and de novo synthesis were not changed by castration and T replacement, but expression of lipid export proteins ApoB100 and microsomal triglyceride transfer protein (MTP) was suppressed by HFD in both intact and castrated rats but restored by T replacement. Macrovesicular lipid droplet-related proteins perilipin 1 and fat-specific protein 27 were increased by HFD in castrated rats and suppressed by T replacement. Higher activation/expression of ER stress proteins (PERK, IRE-1α, JNK, NF-κB, and CHOP) was demonstrated in castrated rats fed HFD compared with intact animals, and T replacement suppressed these changes. We conclude that 1) HFD leads to ApoB100/MTP suppression reducing export of lipids; 2) castration promotes progression to steatohepatitis through activation of the ER stress pathway and enhancement of macrovesicular droplet protein expression; and 3) testosterone suppresses ER stress, inhibits the formation of macrovesicular lipid droplets, promotes lipid export, and ameliorates steatohepatitis induced by HFD and castration.
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Affiliation(s)
- Yue Jia
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Jennifer K Yee
- Department and Endocrinology, Department of Pediatrics, Harbor-UCLA Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Christina Wang
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Liana Nikolaenko
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Maruja Diaz-Arjonilla
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Joshua N Cohen
- Department and Endocrinology, Department of Pediatrics, Harbor-UCLA Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Samuel W French
- Department of Pathology, Harbor-UCLA Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Peter Y Liu
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - YanHe Lue
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Wai-Nang P Lee
- Department and Endocrinology, Department of Pediatrics, Harbor-UCLA Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
| | - Ronald S Swerdloff
- Division of Endocrinology, Department of Medicine, Harbor-University of California, Los Angeles (UCLA), Medical Center , Torrance, California
- Department of Pathology, Harbor-UCLA Medical Center , Torrance, California
- Los Angeles Biomedical Research Institute , Torrance, California
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39
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Gilglioni EH, Chang J, Duijst S, Go S, Adam AAA, Hoekstra R, Verhoeven AJ, Ishii‐Iwamoto EL, Oude Elferink RP. Improved oxygenation dramatically alters metabolism and gene expression in cultured primary mouse hepatocytes. Hepatol Commun 2018; 2:299-312. [PMID: 29507904 PMCID: PMC5831026 DOI: 10.1002/hep4.1140] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 11/11/2017] [Accepted: 12/05/2017] [Indexed: 01/04/2023] Open
Abstract
Primary hepatocyte culture is an important in vitro system for the study of liver functions. In vivo, hepatocytes have high oxidative metabolism. However, oxygen supply by means of diffusion in in vitro static cultures is much less than that by blood circulation in vivo. Therefore, we investigated whether hypoxia contributes to dedifferentiation and deregulated metabolism in cultured hepatocytes. To this end, murine hepatocytes were cultured under static or shaken (60 revolutions per minute) conditions in a collagen sandwich. The effect of hypoxia on hepatocyte cultures was examined by metabolites in media and cells, hypoxia-inducible factors (HIF)-1/2α western blotting, and real-time quantitative polymerase chain reaction for HIF target genes and key genes of glucose and lipid metabolism. Hepatocytes in shaken cultures showed lower glycolytic activity and triglyceride accumulation than static cultures, compatible with improved oxygen delivery and mitochondrial energy metabolism. Consistently, static cultures displayed significant HIF-2α expression, which was undetectable in freshly isolated hepatocytes and shaken cultures. Transcript levels of HIF target genes (glyceraldehyde 3-phosphate dehydrogenase [Gapdh], glucose transporter 1 [Glut1], pyruvate dehydrogenase kinase 1 [Pdk1], and lactate dehydrogenase A [Ldha]) and key genes of lipid metabolism, such as carnitine palmitoyltransferase 1 (Cpt1), apolipoprotein B (Apob), and acetyl-coenzyme A carboxylase 1 (Acc1), were significantly lower in shaken compared to static cultures. Moreover, expression of hepatocyte nuclear factor 4α (Hnf4α) and farnesoid X receptor (Fxr) were better preserved in shaken cultures as a result of improved oxygen delivery. We further revealed that HIF-2 signaling was involved in hypoxia-induced down-regulation of Fxr. Conclusion: Primary murine hepatocytes in static culture suffer from hypoxia. Improving oxygenation by simple shaking prevents major changes in expression of metabolic enzymes and aberrant triglyceride accumulation; in addition, it better maintains the differentiation state of the cells. The shaken culture is, therefore, an advisable strategy for the use of primary hepatocytes as an in vitro model. (Hepatology Communications 2018;2:299-312).
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Affiliation(s)
- Eduardo H. Gilglioni
- Department of Biochemistry, Laboratory of Experimental SteatosisUniversity of MaringáMaringáBrazil
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Jung‐Chin Chang
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Suzanne Duijst
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Simei Go
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Aziza A. A. Adam
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
- Surgical Laboratory, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Ruurdtje Hoekstra
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
- Surgical Laboratory, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Arthur J. Verhoeven
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Emy L. Ishii‐Iwamoto
- Department of Biochemistry, Laboratory of Experimental SteatosisUniversity of MaringáMaringáBrazil
| | - Ronald P.J. Oude Elferink
- Tytgat Institute for Liver and Intestinal Research, Academic Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
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40
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Xu Z, Zhai L, Yi T, Gao H, Fan F, Li Y, Wang Y, Li N, Xing X, Su N, Wu F, Chang L, Chen X, Dai E, Zhao C, Yang X, Cui C, Xu P. Hepatitis B virus X induces inflammation and cancer in mice liver through dysregulation of cytoskeletal remodeling and lipid metabolism. Oncotarget 2018; 7:70559-70574. [PMID: 27708241 PMCID: PMC5342574 DOI: 10.18632/oncotarget.12372] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 09/13/2016] [Indexed: 12/31/2022] Open
Abstract
Hepatitis B virus X protein (HBx) participates in the occurrence and development processes of hepatocellular carcinoma (HCC) as a multifunctional regulation factor. However, the underlying molecular mechanism remains obscure. Here, we describe the use of p21HBx/+ mouse and SILAM (Stable Isotope Labeling in Mammals) strategy to define the pathological mechanisms for the occurrence and development of HBx induced liver cancer. We systematically compared a series of proteome samples from regular mice, 12- and 24-month old p21HBx/+ mice representing the inflammation and HCC stages of liver disease respectively and their nontransgenic wild-type (WT) littermates. Totally we identified 22 and 97 differentially expressed proteins out of a total of 2473 quantified proteins. Bioinformatics analysis suggested that the lipid metabolism and CDC42-induced cytoskeleton remodeling pathways were strongly activated by the HBx transgene. Interestingly, the protein-protein interaction MS study revealed that HBx directly interacted with multiple proteins in these two pathways. The same effect of up-regulation of cytoskeleton and lipid metabolism related proteins, including CDC42, CFL1, PPARγ and ADFP, was also observed in the Huh-7 cells transfected with HBx. More importantly, CFL1 and ADFP were specifically accumulated in HBV-associated HCC (HBV-HCC) patient samples, and their expression levels were positively correlated with the severity of HBV-related liver disease. These results provide evidence that HBx induces the dysregulation of cytoskeleton remodeling and lipid metabolism and leads to the occurrence and development of liver cancer. The CFL1 and ADFP might be served as potential biomarkers for prognosis and diagnosis of HBV-HCC.
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Affiliation(s)
- Zhongwei Xu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China.,Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin, 300309, P.R. China
| | - Linghui Zhai
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Tailong Yi
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China.,Anhui Medical University, Hefei, 230032, P.R. China
| | - Huiying Gao
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Fengxu Fan
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China.,Anhui Medical University, Hefei, 230032, P.R. China
| | - Yanchang Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Youliang Wang
- Beijing Institute of Bioengineering, Beijing, 100071, P. R. China
| | - Ning Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Xiaohua Xing
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Na Su
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Feilin Wu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Lei Chang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Xiuli Chen
- The Fifth Hospital of Shijiazhuang City, Shijiazhuang, 050021, P.R. China
| | - Erhei Dai
- The Fifth Hospital of Shijiazhuang City, Shijiazhuang, 050021, P.R. China
| | - Chao Zhao
- Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, and Research Center on Aging and Medicine, Fudan University, Shanghai, 200032, P.R. China
| | - Xiao Yang
- Beijing Institute of Bioengineering, Beijing, 100071, P. R. China
| | - Chunping Cui
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China
| | - Ping Xu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, National Center for Protein Sciences Beijing, Institute of Radiation Medicine, Beijing, 102206, P.R. China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430072, P. R. China.,Anhui Medical University, Hefei, 230032, P.R. China
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41
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Prognostic significance of PLIN1 expression in human breast cancer. Oncotarget 2018; 7:54488-54502. [PMID: 27359054 PMCID: PMC5342357 DOI: 10.18632/oncotarget.10239] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 05/13/2016] [Indexed: 12/18/2022] Open
Abstract
Breast cancer is a heterogeneous disease associated with diverse clinical, biological and molecular features, presenting huge challenges for prognosis and treatment. Here we found that perilipin-1 (PLIN1) mRNA expression is significantly downregulated in human breast cancer. Kaplan-Meier analysis indicated that patients presenting with reduced PLIN1 expression exhibited poorer overall metastatic relapse-free survival (p = 0.03). Further Cox proportional hazard models analysis revealed that the reduced expression of PLIN1 is an independent predictor of overall survival in estrogen receptor positive (p < 0.0001, HR = 0.87, 95% CI = 0.81–0.92, N = 3,600) and luminal A-subtype (p = 0.02, HR = 0.88, 95% CI = 0.78–0.98, N = 1,469) breast cancer patients. We also demonstrated that the exogenous expression of PLIN1 in human breast cancer MCF-7 and MDA-MB-231 cells significantly inhibits cell proliferation, migration, invasion and in vivo tumorigenesis in mice. Together, these data provide novel insights into a prognostic significance of PLIN1 in human breast cancer and reveal a potentially new gene therapy target for breast cancer.
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Abstract
Triglyceride molecules represent the major form of storage and transport of fatty acids within cells and in the plasma. The liver is the central organ for fatty acid metabolism. Fatty acids accrue in liver by hepatocellular uptake from the plasma and by de novo biosynthesis. Fatty acids are eliminated by oxidation within the cell or by secretion into the plasma within triglyceride-rich very low-density lipoproteins. Notwithstanding high fluxes through these pathways, under normal circumstances the liver stores only small amounts of fatty acids as triglycerides. In the setting of overnutrition and obesity, hepatic fatty acid metabolism is altered, commonly leading to the accumulation of triglycerides within hepatocytes, and to a clinical condition known as nonalcoholic fatty liver disease (NAFLD). In this review, we describe the current understanding of fatty acid and triglyceride metabolism in the liver and its regulation in health and disease, identifying potential directions for future research. Advances in understanding the molecular mechanisms underlying the hepatic fat accumulation are critical to the development of targeted therapies for NAFLD. © 2018 American Physiological Society. Compr Physiol 8:1-22, 2018.
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Affiliation(s)
- Michele Alves-Bezerra
- Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, New York, USA
| | - David E Cohen
- Joan & Sanford I. Weill Department of Medicine, Weill Cornell Medical College, New York, USA
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43
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Molina E, Chew GS, Myers SA, Clarence EM, Eales JM, Tomaszewski M, Charchar FJ. A Novel Y-Specific Long Non-Coding RNA Associated with Cellular Lipid Accumulation in HepG2 cells and Atherosclerosis-related Genes. Sci Rep 2017; 7:16710. [PMID: 29196750 PMCID: PMC5711902 DOI: 10.1038/s41598-017-17165-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 11/22/2017] [Indexed: 01/22/2023] Open
Abstract
There is an increasing appreciation for the role of the human Y chromosome in phenotypic differences between the sexes in health and disease. Previous studies have shown that genetic variation within the Y chromosome is associated with cholesterol levels, which is an established risk factor for atherosclerosis, the underlying cause of coronary artery disease (CAD), a major cause of morbidity and mortality worldwide. However, the exact mechanism and potential genes implicated are still unidentified. To date, Y chromosome-linked long non-coding RNAs (lncRNAs) are poorly characterized and the potential link between these new regulatory RNA molecules and hepatic function in men has not been investigated. Advanced technologies of lncRNA subcellular localization and silencing were used to identify a novel intergenic Y-linked lncRNA, named lnc-KDM5D-4, and investigate its role in fatty liver-associated atherosclerosis. We found that lnc-KDM5D-4 is retained within the nucleus in hepatocytes. Its knockdown leads to changes in genes leading to increased lipid droplets formation in hepatocytes resulting in a downstream effect contributing to the chronic inflammatory process that underpin CAD. Our findings provide the first evidence for the implication of lnc-KDM5D-4 in key processes related to fatty liver and cellular inflammation associated with atherosclerosis and CAD in men.
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Affiliation(s)
- Elsa Molina
- School of Applied and Biomedical Sciences, Faculty of Science and Technology, Federation University, Mount Helen Campus, Ballarat, VIC, Australia
| | - Guat S Chew
- School of Applied and Biomedical Sciences, Faculty of Science and Technology, Federation University, Mount Helen Campus, Ballarat, VIC, Australia
| | - Stephen A Myers
- School of Health Sciences, Faculty of Health, University of Tasmania, Newnham Campus, Launceston, TAS, Australia
| | - Elyse M Clarence
- School of Applied and Biomedical Sciences, Faculty of Science and Technology, Federation University, Mount Helen Campus, Ballarat, VIC, Australia
| | - James M Eales
- Institute of Cardiovascular Sciences, The University of Manchester, Manchester, UK
| | - Maciej Tomaszewski
- Institute of Cardiovascular Sciences, The University of Manchester, Manchester, UK
| | - Fadi J Charchar
- School of Applied and Biomedical Sciences, Faculty of Science and Technology, Federation University, Mount Helen Campus, Ballarat, VIC, Australia. .,Department of Physiology, University of Melbourne, Melbourne, Australia. .,Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.
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44
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Kim DH, Kim J, Kwon JS, Sandhu J, Tontonoz P, Lee SK, Lee S, Lee JW. Critical Roles of the Histone Methyltransferase MLL4/KMT2D in Murine Hepatic Steatosis Directed by ABL1 and PPARγ2. Cell Rep 2017; 17:1671-1682. [PMID: 27806304 DOI: 10.1016/j.celrep.2016.10.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 09/12/2016] [Accepted: 10/07/2016] [Indexed: 10/20/2022] Open
Abstract
The pathophysiologic continuum of non-alcoholic fatty liver disease begins with steatosis. Despite recent advances in our understanding of the gene regulatory program directing steatosis, how it is orchestrated at the chromatin level is unclear. PPARγ2 is a hepatic steatotic transcription factor induced by overnutrition. Here, we report that the histone H3 lysine 4 methyltransferase MLL4/KMT2D directs overnutrition-induced murine steatosis via its coactivator function for PPARγ2. We demonstrate that overnutrition facilitates the recruitment of MLL4 to steatotic target genes of PPARγ2 and their transactivation via H3 lysine 4 methylation because PPARγ2 phosphorylated by overnutrition-activated ABL1 kinase shows enhanced interaction with MLL4. We further show that Pparg2 (encoding PPARγ2) is also a hepatic target gene of ABL1-PPARγ2-MLL4. Consistently, inhibition of ABL1 improves the fatty liver condition of mice with overnutrition by suppressing the pro-steatotic action of MLL4. Our results uncover a murine hepatic steatosis regulatory axis consisting of ABL1-PPARγ2-MLL4, which may serve as a target of anti-steatosis drug development.
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Affiliation(s)
- Dae-Hwan Kim
- Neuroscience Section, Papé Family Pediatric Research Institute, Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239, USA
| | - Janghyun Kim
- Neuroscience Section, Papé Family Pediatric Research Institute, Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239, USA
| | - Ji-Sun Kwon
- Neuroscience Section, Papé Family Pediatric Research Institute, Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239, USA
| | - Jaspreet Sandhu
- Department of Pathology and Laboratory Medicine, Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Peter Tontonoz
- Department of Pathology and Laboratory Medicine, Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Soo-Kyung Lee
- Neuroscience Section, Papé Family Pediatric Research Institute, Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239, USA; Vollum Institute, Oregon Health and Science University, Portland, OR 97239, USA
| | - Seunghee Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 08826 Seoul, Korea.
| | - Jae W Lee
- Neuroscience Section, Papé Family Pediatric Research Institute, Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239, USA.
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45
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Chirambo G, van Niekerk C, Crowther NJ. Specific knock-down of tissue non-specific alkaline phosphatase mRNA levels inhibits intracellular lipid accumulation in 3T3-L1 and HepG2 cells. Int J Exp Pathol 2017; 98:260-268. [PMID: 28925080 PMCID: PMC5743820 DOI: 10.1111/iep.12243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 08/01/2017] [Indexed: 11/30/2022] Open
Abstract
The use of non-specific inhibitors of tissue non-specific alkaline phosphatase (TNSALP) in pre-adipocytes blocks intracellular lipid accumulation. TNSALP is also expressed in hepatocytes, which are known to accumulate lipid in a similar manner to pre-adipocytes. The purpose of this study was to use specific silencing of TNSALP mRNA, using short interfering (si) RNA, to investigate the role of TNSALP in intracellular lipid accumulation in 3T3-L1 and HepG2 cells. Cellular activity of TNSALP was measured using an automated colorimetric assay, and intracellular lipid accumulation was determined using the lipid-specific dye, Oil Red O. Cells were transfected with siRNA directed against TNSALP mRNA, and expression of the TNSALP gene was determined at selected time points postinduction of lipid droplet formation. Expression of the TNSALP gene was inhibited by a maximum of 88 ± 1.9% (P < 0.005 vs. control) 11 days after initiation of lipid droplet formation in the 3T3-L1 cells and 80 ± 8.9% (P < 0.05 vs. control) after 4 days in the HepG2 cells. This led to significant inhibition of both TNSALP activity and intracellular lipid accumulation in both cell lines. These data demonstrates that TNSALP plays an important role in the control of lipid droplet formation in both pre-adipocyte and hepatocyte cell lines.
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Affiliation(s)
- George Chirambo
- Department of Chemical PathologyNational Health Laboratory ServiceUniversity of Witwatersrand Medical SchoolJohannesburgSouth Africa
- Department of BiochemistryCollege Of MedicineUniversity of MalawiMalawiBlantyre
| | - Chantal van Niekerk
- Department of Chemical PathologyNational Health Laboratory ServiceUniversity of Witwatersrand Medical SchoolJohannesburgSouth Africa
| | - Nigel J. Crowther
- Department of Chemical PathologyNational Health Laboratory ServiceUniversity of Witwatersrand Medical SchoolJohannesburgSouth Africa
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46
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Wallstab C, Eleftheriadou D, Schulz T, Damm G, Seehofer D, Borlak J, Holzhütter HG, Berndt N. A unifying mathematical model of lipid droplet metabolism reveals key molecular players in the development of hepatic steatosis. FEBS J 2017; 284:3245-3261. [PMID: 28763157 DOI: 10.1111/febs.14189] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 06/02/2017] [Accepted: 07/28/2017] [Indexed: 12/16/2022]
Abstract
The liver responds to elevated plasma concentrations of free fatty acids (FFAs) with an enhanced uptake of FFAs and their esterification to triacylglycerol (TAG). On the long term, this may result in massive hepatic TAG accumulation called steatosis hepatitis. In hepatocytes, the poor water-soluble TAG is packed in specialized organelles: Lipid droplets (LDs) serving as transient cellular deposit and lipoproteins (LPs) transporting TAG and cholesterol esters to extra-hepatic tissues. The dynamics of these organelles is controlled by a variety of regulatory surface proteins (RSPs). Assembly and export of VLDLs are mainly regulated by the microsomal transfer protein (MTP) and apoprotein B100. Formation and lipolysis of LDs are regulated by several RSPs. The best studied regulators belong to the PAT (Perilipin/Adipophilin/TIP47) and CIDE families. Knockdown or overexpression of SRPs may significantly affect the total number and size distribution of LDs. Intriguingly, a large cell-to-cell heterogeneity with respect to the number and size of LDs has been found in various cell types including hepatocytes. These findings suggest that the extent of cellular lipid accumulation is determined not only by the imbalance between lipid supply and utilization but also by variations in the expression of RSPs and metabolic enzymes. To better understand the relative regulatory impact of individual processes involved in the cellular TAG turnover, we developed a comprehensive kinetic model encompassing the pathways of the fatty acid and triglyceride metabolism and the main molecular processes governing the dynamics of LDs. The model was parametrized such that a large number of experimental in vitro and in vivo findings are correctly recapitulated. A control analysis of the model revealed that variations in the activity of FFA uptake, diacylglycerol acyltransferase (DGAT) 2, and adipose triglyceride lipase (ATGL) have the strongest influence on the cellular TAG level. We used the model to simulate LD size distributions in human hepatoma cells and hepatocytes exposed to a challenge with FFAs. A random fold change by a factor of about two in the activity of RSPs was sufficient to reproduce the large diversity of droplet size distributions observed in individual cells. Under the premise that the same extent of variability of RSPs holds for the intact organ, our model predicts variations in the TAG content of individual hepatocytes by a factor of about 3-6 depending on the nutritional regime. Taken together, our modeling approach integrates numerous experimental findings on individual processes in the cellular TAG metabolism and LD dynamics metabolism to a consistent state-of-the-art dynamic network model that can be used to study how changes in the external conditions or systemic parameters will affect the TAG content of hepatocytes.
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Affiliation(s)
- Christin Wallstab
- Institute of Biochemistry, Computational Systems Biochemistry Group, Charite - University Medicine Berlin, Germany
| | - Dimitra Eleftheriadou
- Institute of Biochemistry, Computational Systems Biochemistry Group, Charite - University Medicine Berlin, Germany
| | - Theresa Schulz
- Clinic for General-, Visceral- and Transplantation Surgery, Charite - University Medicine Berlin, Germany
| | - Georg Damm
- Clinic for General-, Visceral- and Transplantation Surgery, Charite - University Medicine Berlin, Germany.,Department of Hepatobiliary Surgery and Visceral Transplantation, University of Leipzig, Germany
| | - Daniel Seehofer
- Clinic for General-, Visceral- and Transplantation Surgery, Charite - University Medicine Berlin, Germany.,Department of Hepatobiliary Surgery and Visceral Transplantation, University of Leipzig, Germany
| | - Jürgen Borlak
- Centre for Pharmacology and Toxicology, Institute for Pharmaco- and Toxicogenomics, Hannover Medical School, Hannover, Germany
| | - Hermann-Georg Holzhütter
- Institute of Biochemistry, Computational Systems Biochemistry Group, Charite - University Medicine Berlin, Germany
| | - Nikolaus Berndt
- Institute of Biochemistry, Computational Systems Biochemistry Group, Charite - University Medicine Berlin, Germany
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47
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Engin A. Non-Alcoholic Fatty Liver Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 960:443-467. [DOI: 10.1007/978-3-319-48382-5_19] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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48
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Gorga A, Rindone GM, Regueira M, Pellizzari EH, Camberos MC, Cigorraga SB, Riera MF, Galardo MN, Meroni SB. PPARγ activation regulates lipid droplet formation and lactate production in rat Sertoli cells. Cell Tissue Res 2017; 369:611-624. [PMID: 28432465 DOI: 10.1007/s00441-017-2615-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/09/2017] [Indexed: 12/29/2022]
Abstract
Sertoli cells provide the structural and nutritional support for germ cell development; they actively metabolize glucose and convert it to lactate, which is an important source of energy for germ cells. Furthermore, Sertoli cells can oxidize fatty acids, a metabolic process that is assumed to fulfill their own energy requirements. Fatty acids are stored as triacylglycerides within lipid droplets. The regulation of fatty acid storage in conjunction with the regulation of lactate production may thus be relevant to seminiferous tubule physiology. Our aim is to evaluate a possible means of regulation by the PPARγ activation of lipid droplet formation and lactate production. Sertoli cell cultures obtained from 20-day-old rats were incubated with Rosiglitazone (10 μM), a PPARγ activator, for various periods of time (6, 12, 24 and 48 h). Increased triacylglycerides levels and lipid droplet content were observed, accompanied by a rise in the expression of genes for proteins involved in fatty acid storage, such as the fatty acid transporter Cd36, glycerol-3-phosphate-acyltransferases 1 and 3, diacylglycerol acyltransferase 1 and perilipins 1, 2 and 3, all proteins that participate in lipid droplet formation and stabilization. However, PPARγ activation increased lactate production, accompanied by an augmentation in glucose uptake and Glut2 expression. These results taken together suggest that PPARγ activation in Sertoli cells participates in the regulation of lipid storage and lactate production thereby ensuring simultaneously the energetic metabolism for the Sertoli and germ cells.
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Affiliation(s)
- A Gorga
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - G M Rindone
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - M Regueira
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - E H Pellizzari
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - M C Camberos
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - S B Cigorraga
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - M F Riera
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - M N Galardo
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina
| | - S B Meroni
- Centro de Investigaciones Endocrinológicas, "Dr César Bergadá", CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Buenos Aires, Argentina.
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49
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Dossi CG, Cadagan C, San Martín M, Espinosa A, González-Mañán D, Silva D, Mancilla RA, Tapia GS. Effects of rosa mosqueta oil supplementation in lipogenic markers associated with prevention of liver steatosis. Food Funct 2017; 8:832-841. [PMID: 28128380 DOI: 10.1039/c6fo01762b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Rosa mosqueta (RM) oil is rich in α-linolenic acid (ALA) - a precursor of eicosapentaenoic (EPA) and docosahexaenoic acid (DHA), and it has a high antioxidant activity due to its abundant content of tocopherols. Additionally, it has been observed that RM oil administration prevents hepatic steatosis. Thus, the aim of this study was to demonstrate the antilipogenic mechanism related to RM oil administration in a high-fat diet (HFD) fed mice model by evaluating markers associated with the regulation of lipid droplet metabolism (PLIN2, PLIN5 and PPAR-γ), and proteins associated with lipogenesis (FAS and SREBP-1c). C57BL/6J mice were fed either a control diet or a HFD, with and without RM oil supplementation for 12 weeks. The results showed that RM oil supplementation decreases hepatic PLIN2 and PPAR-γ mRNA expression and SREBP-1c, FAS and PLIN2 protein levels, whereas we did not find changes in the level of PLIN5 among the groups. These results suggest that modulation of lipogenic markers could be one of the mechanisms, through which RM oil supplementation prevents the hepatic steatosis induced by HFD consumption in a mice model.
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Affiliation(s)
- Camila G Dossi
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
| | - Cynthia Cadagan
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
| | - Marcela San Martín
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
| | - Alejandra Espinosa
- Department of Medical Technology, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Daniel González-Mañán
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
| | - David Silva
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
| | - Rodrigo A Mancilla
- School of Biochemical Engineering, Faculty of Engineering, Pontifical Catholic University of Valparaiso, Valparaiso, Chile
| | - Gladys S Tapia
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
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50
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Chirambo GM, van Niekerk C, Crowther NJ. The role of alkaline phosphatase in intracellular lipid accumulation in the human hepatocarcinoma cell line, HepG2. Exp Mol Pathol 2017; 102:224-229. [PMID: 28209522 DOI: 10.1016/j.yexmp.2017.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/11/2017] [Indexed: 01/15/2023]
Abstract
Inhibition of tissue non-specific alkaline phosphatase (TNALP) decreases intracellular lipid accumulation in human preadipocytes and the murine preadipocyte cell line, 3T3-L1. Therefore, the current study was performed to determine if TNALP is required for intracellular lipid deposition in the human hepatocyte cell line, HepG2. Intracellular lipid accumulation, TNALP activity and peroxisome proliferator activated receptor (PPAR) γ gene expression were measured in HepG2 and 3T3-L1 cells in the presence and absence of the TNALP inhibitors levamisole and histidine. Sub-cellular TNALP activity was localized using cytochemical analysis. Both PPARγ gene expression and TNALP activity increased during intracellular lipid accumulation in HepG2 and 3T3-L1 cells. Inhibition of TNALP blocked intracellular lipid accumulation but did not alter expression of the PPARγ gene. In HepG2 cells, TNALP co-localized with adipophilin on the lipid droplet membrane. These data suggest a role for TNALP in lipid droplet formation, possibly downstream from PPARγ, within HepG2 and 3T3-L1 cells.
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Affiliation(s)
- George M Chirambo
- Department of Chemical Pathology, National Health Laboratory Service, University of Witwatersrand Medical School, Johannesburg, South Africa; Department of Biochemistry, College Of Medicine, University of Malawi, Blantyre, Malawi.
| | - Chantal van Niekerk
- Department of Chemical Pathology, National Health Laboratory Service, University of Witwatersrand Medical School, Johannesburg, South Africa.
| | - Nigel J Crowther
- Department of Chemical Pathology, National Health Laboratory Service, University of Witwatersrand Medical School, Johannesburg, South Africa.
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