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Worthmann A, Ridder J, Piel SYL, Evangelakos I, Musfeldt M, Voß H, O'Farrell M, Fischer AW, Adak S, Sundd M, Siffeti H, Haumann F, Kloth K, Bierhals T, Heine M, Pertzborn P, Pauly M, Scholz JJ, Kundu S, Fuh MM, Neu A, Tödter K, Hempel M, Knippschild U, Semenkovich CF, Schlüter H, Heeren J, Scheja L, Kubisch C, Schlein C. Fatty acid synthesis suppresses dietary polyunsaturated fatty acid use. Nat Commun 2024; 15:45. [PMID: 38167725 PMCID: PMC10762034 DOI: 10.1038/s41467-023-44364-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/11/2023] [Indexed: 01/05/2024] Open
Abstract
Dietary polyunsaturated fatty acids (PUFA) are increasingly recognized for their health benefits, whereas a high production of endogenous fatty acids - a process called de novo lipogenesis (DNL) - is closely linked to metabolic diseases. Determinants of PUFA incorporation into complex lipids are insufficiently understood and may influence the onset and progression of metabolic diseases. Here we show that fatty acid synthase (FASN), the key enzyme of DNL, critically determines the use of dietary PUFA in mice and humans. Moreover, the combination of FASN inhibition and PUFA-supplementation decreases liver triacylglycerols (TAG) in mice fed with high-fat diet. Mechanistically, FASN inhibition causes higher PUFA uptake via the lysophosphatidylcholine transporter MFSD2A, and a diacylglycerol O-acyltransferase 2 (DGAT2)-dependent incorporation of PUFA into TAG. Overall, the outcome of PUFA supplementation may depend on the degree of endogenous DNL and combining PUFA supplementation and FASN inhibition might be a promising approach to target metabolic disease.
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Affiliation(s)
- Anna Worthmann
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Julius Ridder
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sharlaine Y L Piel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ioannis Evangelakos
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Melina Musfeldt
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hannah Voß
- Section / Core Facility Mass Spectrometry and Proteomics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marie O'Farrell
- Sagimet Biosciences Inc., 155 Bovet Rd., San Mateo, CA, 94402, USA
| | - Alexander W Fischer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Molecular Metabolism, Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Sangeeta Adak
- Division of Endocrinology, Metabolism & Lipid Research, Department of Medicine, Washington University, St. Louis, MO, USA
| | - Monica Sundd
- National Institute of Immunology, New Delhi, India
| | - Hasibullah Siffeti
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Friederike Haumann
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Katja Kloth
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tatjana Bierhals
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Heine
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Paul Pertzborn
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mira Pauly
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Julia-Josefine Scholz
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Suman Kundu
- Department of Biochemistry, University of Delhi South Campus, New Delhi 110021 and Department of Biological Sciences, Birla Institute of Technology and Science Pilani, K K Birla Goa Campus, Goa, 403726, India
| | - Marceline M Fuh
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Axel Neu
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Klaus Tödter
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maja Hempel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Human Genetics, University Hospital Heidelberg, Im Neuenheimer Feld 440, 69120, Heidelberg, Germany
| | - Uwe Knippschild
- Department of General and Visceral Surgery, University Hospital Ulm, Ulm, Germany
| | - Clay F Semenkovich
- Division of Endocrinology, Metabolism & Lipid Research, Department of Medicine, Washington University, St. Louis, MO, USA
| | - Hartmut Schlüter
- Section / Core Facility Mass Spectrometry and Proteomics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Kubisch
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Schlein
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Schlein C, Fischer AW, Sass F, Worthmann A, Tödter K, Jaeckstein MY, Behrens J, Lynes MD, Kiebish MA, Narain NR, Bussberg V, Darkwah A, Jespersen NZ, Nielsen S, Scheele C, Schweizer M, Braren I, Bartelt A, Tseng YH, Heeren J, Scheja L. Endogenous Fatty Acid Synthesis Drives Brown Adipose Tissue Involution. Cell Rep 2021; 34:108624. [PMID: 33440156 PMCID: PMC8240962 DOI: 10.1016/j.celrep.2020.108624] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 11/20/2020] [Accepted: 12/18/2020] [Indexed: 12/12/2022] Open
Abstract
Thermoneutral conditions typical for standard human living environments result in brown adipose tissue (BAT) involution, characterized by decreased mitochondrial mass and increased lipid deposition. Low BAT activity is associated with poor metabolic health, and BAT reactivation may confer therapeutic potential. However, the molecular drivers of this BAT adaptive process in response to thermoneutrality remain enigmatic. Using metabolic and lipidomic approaches, we show that endogenous fatty acid synthesis, regulated by carbohydrate-response element-binding protein (ChREBP), is the central regulator of BAT involution. By transcriptional control of lipogenesis-related enzymes, ChREBP determines the abundance and composition of both storage and membrane lipids known to regulate organelle turnover and function. Notably, ChREBP deficiency and pharmacological inhibition of lipogenesis during thermoneutral adaptation preserved mitochondrial mass and thermogenic capacity of BAT independently of mitochondrial biogenesis. In conclusion, we establish lipogenesis as a potential therapeutic target to prevent loss of BAT thermogenic capacity as seen in adult humans. Schlein et al. show that carbohydrate-response element-binding protein (ChREBP) controls de novo lipogenesis (DNL) in brown adipose tissue (BAT) and determines BAT whitening in response to thermoneutral housing. ChREBP deficiency prevents enrichment of DNL-derived lipids and mitophagy during BAT involution, which is associated with higher thermogenic capacity.
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Affiliation(s)
- Christian Schlein
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alexander W Fischer
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Frederike Sass
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anna Worthmann
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Klaus Tödter
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michelle Y Jaeckstein
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Janina Behrens
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthew D Lynes
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA
| | | | | | | | | | - Naja Zenius Jespersen
- Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Søren Nielsen
- Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Camilla Scheele
- Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Michaela Schweizer
- Core Facility of Electron Microscopy, Center for Molecular Neurobiology ZMNH, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ingke Braren
- Vector Facility, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alexander Bartelt
- Department of Molecular Metabolism & Sabri Ülker Center, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Institute for Cardiovascular Prevention (IPEK), Ludwig-Maximilians-University, 81377 Munich, Germany; German Center for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Munich, Germany; Institute for Diabetes and Cancer (IDC), Helmholtz Center Munich, Neuherberg, Germany
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA; Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Pauly MJ, Rohde JK, John C, Evangelakos I, Koop AC, Pertzborn P, Tödter K, Scheja L, Heeren J, Worthmann A. Inulin Supplementation Disturbs Hepatic Cholesterol and Bile Acid Metabolism Independent from Housing Temperature. Nutrients 2020; 12:nu12103200. [PMID: 33092056 PMCID: PMC7589137 DOI: 10.3390/nu12103200] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/16/2020] [Accepted: 10/17/2020] [Indexed: 01/04/2023] Open
Abstract
Dietary fibers are fermented by gut bacteria into the major short chain fatty acids (SCFAs) acetate, propionate, and butyrate. Generally, fiber-rich diets are believed to improve metabolic health. However, recent studies suggest that long-term supplementation with fibers causes changes in hepatic bile acid metabolism, hepatocyte damage, and hepatocellular cancer in dysbiotic mice. Alterations in hepatic bile acid metabolism have also been reported after cold-induced activation of brown adipose tissue. Here, we aim to investigate the effects of short-term dietary inulin supplementation on liver cholesterol and bile acid metabolism in control and cold housed specific pathogen free wild type (WT) mice. We found that short-term inulin feeding lowered plasma cholesterol levels and provoked cholestasis and mild liver damage in WT mice. Of note, inulin feeding caused marked perturbations in bile acid metabolism, which were aggravated by cold treatment. Our studies indicate that even relatively short periods of inulin consumption in mice with an intact gut microbiome have detrimental effects on liver metabolism and function.
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Affiliation(s)
- Mira J. Pauly
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Julia K. Rohde
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Clara John
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Ioannis Evangelakos
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Anja Christina Koop
- Department of Internal Medicine I, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany;
| | - Paul Pertzborn
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Klaus Tödter
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
| | - Anna Worthmann
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (M.J.P.); (J.K.R.); (C.J.); (I.E.); (P.P.); (K.T.); (L.S.); (J.H.)
- Correspondence:
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Werner JU, Tödter K, Xu P, Lockhart L, Jähnert M, Gottmann P, Schürmann A, Scheja L, Wabitsch M, Knippschild U. Comparison of Fatty Acid and Gene Profiles in Skeletal Muscle in Normal and Obese C57BL/6J Mice before and after Blunt Muscle Injury. Front Physiol 2018; 9:19. [PMID: 29441023 PMCID: PMC5797686 DOI: 10.3389/fphys.2018.00019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 01/08/2018] [Indexed: 01/14/2023] Open
Abstract
Injury and obesity are two major health burdens affecting millions of people worldwide. Obesity is recognized as a state of chronic inflammation accompanied by various co-morbidities like T2D or cardiovascular diseases. There is increasing evidence that obesity impairs muscle regeneration, which is mainly due to chronic inflammation and to excessive accumulation of lipids in adipose and non-adipose tissue. To compare fatty acid profiles and changes in gene expression at different time points after muscle injury, we used an established drop tower-based model with a defined force input to damage the extensor iliotibialis anticus on the left hind limb of female C57BL/6J mice of normal weight and obese mice. Although most changes in fatty acid content in muscle tissue are diet related, levels of eicosaenoic (normal weight) and DHG-linolenic acid (obese) in the phospholipid and docosahexaenoic acid (normal weight) in the triglyceride fraction are altered after injury. Furthermore, changes in gene transcription were detected in 3829 genes in muscles of normal weight mice, whereas only 287 genes were altered in muscles of obese mice after trauma. Alterations were found within several pathways, among them notch-signaling, insulin-signaling, sonic hedgehog-signaling, apoptosis related pathways, fat metabolism related cholesterol homeostasis, fatty acid biosynthetic process, fatty acid elongation, and acyl-CoA metabolic process. We could show that genes involved in fat metabolism are affected 3 days after trauma induction mostly in normal weight but not in obese mice. The strongest effects were observed in normal weight mice for Alox5ap, the activating protein for leukotriene synthesis, and Apobec1, an enzyme substantial for LDL synthesis. In summary, we show that obesity changes the fat content of skeletal muscle and generally shows a negative impact upon blunt muscle injury on various cellular processes, among them fatty acid related metabolism, notch-, insulin-, sonic hedgehog-signaling, and apoptosis.
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Affiliation(s)
- Jens-Uwe Werner
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
| | - Klaus Tödter
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Pengfei Xu
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
| | - Lydia Lockhart
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
| | - Markus Jähnert
- Department of Experimental Diabetology, German Institute of Human Nutrition, Potsdam, Germany
| | - Pascal Gottmann
- Department of Experimental Diabetology, German Institute of Human Nutrition, Potsdam, Germany
| | - Annette Schürmann
- Department of Experimental Diabetology, German Institute of Human Nutrition, Potsdam, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Martin Wabitsch
- Division of Pediatric Endocrinology and Diabetes, University Hospital for Pediatrics and Adolescent Medicine, Ulm, Germany
| | - Uwe Knippschild
- Department of General and Visceral Surgery, Ulm University Hospital, Ulm, Germany
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Adrian L, Lenski M, Tödter K, Heeren J, Böhm M, Laufs U. AMPK Prevents Palmitic Acid-Induced Apoptosis and Lipid Accumulation in Cardiomyocytes. Lipids 2017; 52:737-750. [PMID: 28825205 DOI: 10.1007/s11745-017-4285-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Accepted: 08/02/2017] [Indexed: 01/03/2023]
Abstract
Palmitic acid, a main fatty acid (FA) in human nutrition, can induce apoptosis of cardiomyocytes. However, a specific combination of palmitic, myristic and palmitoleic acid (CoFA) has been reported to promote beneficial cardiac growth. The aim of this study was to investigate the relevance of CoFA for cardiac growth and to delineate the underlying signaling pathways of CoFA and palmitic acid treatment. CoFA treatment of C57Bl/6 mice increased FA serum concentrations. However, morphologic and echocardiographic analysis did not show myocardial hypertrophy. Cell culture studies using rat ventricular cardiomyocytes revealed an increased phosphorylation of AMP activated protein kinase α (AMPKα) to 155 ± 19% and its target acetyl-CoA-carboxylase to 177 ± 23% by CoFA. Treatment with myristic acid also increased AMPKα phosphorylation to 189 ± 32%. Palmitic acid did not activate AMPKα but increased expression of the FA translocase CD36 (FAT/CD36) to 163 ± 23% and adipose-differentiation-related-protein (ADRP), a sensitive marker of lipid accumulation, to 168 ± 42%. This was associated with an increased phosphorylation of the stress-activated-protein-kinase/Jun-amino-terminal-kinase (SAPK/JNK) to 173 ± 27%. In CoFA-treated cells, phosphorylation of SAPK/JNK was unaltered. FACS analysis revealed increased apoptosis to 159 ± 5% by palmitic acid but not by CoFA. AMPK activator AICAR (5-aminoimidazole-4-carboxamide ribonucleotide) prevented up-regulation of ADRP and increased apoptosis by palmitic acid. Confirming these findings, inhibition of AMPK by compound C in CoFA-treated cardiomyocytes resulted in an increased expression of ADRP to 154 ± 27%, FAT/CD36 to 167 ± 28% and apoptosis to 183 ± 12%. These data reveal that AMPK activation plays an important role in prevention of palmitic acid-induced apoptosis and lipid accumulation in cardiomyocytes.
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Affiliation(s)
- Lucas Adrian
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, 66421, Homburg, Germany.
| | - Matthias Lenski
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, 66421, Homburg, Germany
| | - Klaus Tödter
- Institut für Biochemie und Molekulare Zellbiologie, Universitätsklinikum Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Jörg Heeren
- Institut für Biochemie und Molekulare Zellbiologie, Universitätsklinikum Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Michael Böhm
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, 66421, Homburg, Germany
| | - Ulrich Laufs
- Klinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, 66421, Homburg, Germany
- Klinik und Poliklinik für Kardiologie, Universitätsklinikum Leipzig, 04103, Leipzig, Germany
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Scherer T, Lindtner C, O'Hare J, Hackl M, Zielinski E, Freudenthaler A, Baumgartner-Parzer S, Tödter K, Heeren J, Krššák M, Scheja L, Fürnsinn C, Buettner C. Insulin Regulates Hepatic Triglyceride Secretion and Lipid Content via Signaling in the Brain. Diabetes 2016; 65:1511-20. [PMID: 26861781 PMCID: PMC4878422 DOI: 10.2337/db15-1552] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 02/04/2016] [Indexed: 12/22/2022]
Abstract
Hepatic steatosis is common in obesity and insulin resistance and results from a net retention of lipids in the liver. A key mechanism to prevent steatosis is to increase secretion of triglycerides (TG) packaged as VLDLs. Insulin controls nutrient partitioning via signaling through its cognate receptor in peripheral target organs such as liver, muscle, and adipose tissue and via signaling in the central nervous system (CNS) to orchestrate organ cross talk. While hepatic insulin signaling is known to suppress VLDL production from the liver, it is unknown whether brain insulin signaling independently regulates hepatic VLDL secretion. Here, we show that in conscious, unrestrained male Sprague Dawley rats the infusion of insulin into the third ventricle acutely increased hepatic TG secretion. Chronic infusion of insulin into the CNS via osmotic minipumps reduced the hepatic lipid content as assessed by noninvasive (1)H-MRS and lipid profiling independent of changes in hepatic de novo lipogenesis and food intake. In mice that lack the insulin receptor in the brain, hepatic TG secretion was reduced compared with wild-type littermate controls. These studies identify brain insulin as an important permissive factor in hepatic VLDL secretion that protects against hepatic steatosis.
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Affiliation(s)
- Thomas Scherer
- Departments of Medicine and Neuroscience, Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Claudia Lindtner
- Departments of Medicine and Neuroscience, Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
| | - James O'Hare
- Departments of Medicine and Neuroscience, Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Martina Hackl
- Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Elizabeth Zielinski
- Departments of Medicine and Neuroscience, Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Angelika Freudenthaler
- Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Sabina Baumgartner-Parzer
- Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Klaus Tödter
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Martin Krššák
- Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria High Field MR Centre, Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Clemens Fürnsinn
- Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Christoph Buettner
- Departments of Medicine and Neuroscience, Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY
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Tsikas D, Suchy MT, Tödter K, Heeren J, Scheja L. Utilizing immunoaffinity chromatography (IAC) cross-reactivity in GC-MS/MS exemplified at the measurement of prostaglandin E1 in human plasma using prostaglandin E2-specific IAC columns. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1021:101-107. [PMID: 25944643 DOI: 10.1016/j.jchromb.2015.04.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/09/2015] [Accepted: 04/14/2015] [Indexed: 02/07/2023]
Abstract
Immunoaffinity chromatography (IAC) is an elegant and highly efficient method to isolate a particular compound from biological samples for measurement by mass spectrometry coupled to GC, CE, or LC. The utility of IAC for the quantitative determination of several prostaglandins including prostaglandin E2 (PGE2) by GC-MS/MS and LC-MS/MS has been demonstrated. The aim of the present work was to test whether the cross-reactivity of the antibody immobilized on an insoluble support can be utilized for the quantitative determination of biomolecules by stable-isotope dilution mass spectrometry. In this communication, we provide evidence that this is indeed possible for prostaglandin E1 (PGE1) in human plasma by GC-MS/MS using commercially available Sepharose 4-based IAC columns with immobilized mouse anti-PGE2 monoclonal antibody with a declared cross-reactivity of about 19% toward PGE1. Endogenous PGE1 and the internal standard [3,3',4,4'-(2)H4]-PGE1 (d4-PGE1) externally added to human plasma samples were extracted by IAC, converted to their pentafluorobenzyl ester-methoxime-trimethylsilyl ether derivatives and analyzed by GC-MS/MS in the electron-capture negative-ion chemical ionization mode. Quantification was performed by selected-reaction monitoring of the mass transition m/z 526→m/z 258 for PGE1 and m/z 530→m/z 262 for d4-PGE1. By this method we measured PGE1 concentrations in EDTA plasma samples (1mL) of six healthy volunteers in the range 10-25pg/mL (29-72pM). PGE1 plasma concentration showed a trend for positive correlation with plasma parameters such as low density lipoprotein (LDL)-cholesterol, total cholesterol and glucose. The method described here provides a novel tool to study the potential link of PGE1 formation to dyslipidemia, insulin resistance and related metabolic disorders.
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Affiliation(s)
- Dimitrios Tsikas
- Bioanalytical Research Laboratory for NO, Eicosanoids and Oxidative Stress, Centre of Pharmacology and Toxicology, Hannover Medical School, 30623 Hannover, Germany.
| | - Maria-Theresia Suchy
- Bioanalytical Research Laboratory for NO, Eicosanoids and Oxidative Stress, Centre of Pharmacology and Toxicology, Hannover Medical School, 30623 Hannover, Germany
| | - Klaus Tödter
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
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John C, Werner P, Worthmann A, Wegner K, Tödter K, Scheja L, Rohn S, Heeren J, Fischer M. A liquid chromatography-tandem mass spectrometry-based method for the simultaneous determination of hydroxy sterols and bile acids. J Chromatogr A 2014; 1371:184-95. [DOI: 10.1016/j.chroma.2014.10.064] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/20/2014] [Accepted: 10/21/2014] [Indexed: 01/07/2023]
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Eissing L, Scherer T, Tödter K, Knippschild U, Greve JW, Buurman WA, Pinnschmidt HO, Rensen SS, Wolf AM, Bartelt A, Heeren J, Buettner C, Scheja L. De novo lipogenesis in human fat and liver is linked to ChREBP-β and metabolic health. Nat Commun 2013; 4:1528. [PMID: 23443556 DOI: 10.1038/ncomms2537] [Citation(s) in RCA: 225] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 01/23/2013] [Indexed: 02/07/2023] Open
Abstract
Clinical interest in de novo lipogenesis has been sparked by recent studies in rodents demonstrating that de novo lipogenesis specifically in white adipose tissue produces the insulin-sensitizing fatty acid palmitoleate. By contrast, hepatic lipogenesis is thought to contribute to metabolic disease. How de novo lipogenesis in white adipose tissue versus liver is altered in human obesity and insulin resistance is poorly understood. Here we show that lipogenic enzymes and the glucose transporter-4 are markedly decreased in white adipose tissue of insulin-resistant obese individuals compared with non-obese controls. By contrast, lipogenic enzymes are substantially upregulated in the liver of obese subjects. Bariatric weight loss restored de novo lipogenesis and glucose transporter-4 gene expression in white adipose tissue. Notably, lipogenic gene expression in both white adipose tissue and liver was strongly linked to the expression of carbohydrate-responsive element-binding protein-β and to metabolic risk markers. Thus, de novo lipogenesis predicts metabolic health in humans in a tissue-specific manner and is likely regulated by glucose-dependent carbohydrate-responsive element-binding protein activation.
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Affiliation(s)
- Leah Eissing
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, D-20246 Hamburg, Germany
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Bartelt A, Weigelt C, Cherradi ML, Niemeier A, Tödter K, Heeren J, Scheja L. Effects of adipocyte lipoprotein lipase on de novo lipogenesis and white adipose tissue browning. Biochim Biophys Acta Mol Cell Biol Lipids 2012; 1831:934-42. [PMID: 23228690 DOI: 10.1016/j.bbalip.2012.11.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 11/27/2012] [Accepted: 11/28/2012] [Indexed: 01/24/2023]
Abstract
Efficient storage of dietary and endogenous fatty acids is a prerequisite for a healthy adipose tissue function. Lipoprotein lipase (LPL) is the master regulator of fatty acid uptake from triglyceride-rich lipoproteins. In addition to LPL-mediated fatty acid uptake, adipocytes are able to synthesize fatty acids from non-lipid precursor, a process called de novo lipogenesis (DNL). As the physiological relevance of fatty acid uptake versus DNL for brown and white adipocyte function remains unclear, we studied the role of adipocyte LPL using adipocyte-specific LPL knockout animals (aLKO). ALKO mice displayed a profound increase in DNL-fatty acids, especially palmitoleate and myristoleate in brown adipose tissue (BAT) and white adipose tissue (WAT) depots while essential dietary fatty acids were markedly decreased. Consequently, we found increased expression in adipose tissues of genes encoding DNL enzymes (Fasn, Scd1, and Elovl6) as well as the lipogenic transcription factor carbohydrate response element binding protein-β. In a high-fat diet (HFD) study aLKO mice were characterized by reduced adiposity and improved plasma insulin and adipokines. However, neither glucose tolerance nor inflammatory markers were ameliorated in aLKO mice compared to controls. No signs of increased BAT activation or WAT browning were detected in aLKO mice either on HFD or after 1 week of β3-adrenergic stimulation using CL316,243. We conclude that despite a profound increase in DNL-derived fatty acids, proposed to be metabolically favorable, aLKO mice are not protected from metabolic disease per se. In addition, induction of DNL alone is not sufficient to promote browning of WAT. This article is part of a Special Issue entitled Brown and White Fat: From Signaling to Disease.
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Affiliation(s)
- Alexander Bartelt
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Germany.
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Vossen M, Tödter K, Altenburg C, Beisiegel U, Scheja L. Plasma triglycerides after oral glucose load specifically associate with metabolic risk markers in healthy type 2 diabetes offspring. Atherosclerosis 2011; 217:214-9. [DOI: 10.1016/j.atherosclerosis.2011.03.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 02/03/2011] [Accepted: 03/07/2011] [Indexed: 10/18/2022]
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Sauer N, Tödter K, Beisiegel U, Nielsen P. P310 CHOLESTEROL- AND FATTY-ACID-PROFILES IN SUBJECTS WITH IRON OVERLOAD AND IRON DEFICIENCY ANEMIA. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70377-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Vossen M, Tödter K, Beisiegel U, Scheja L. Spezifische Plasma-Fettsäuremuster sind assoziiert mit Insulinresistenz und Komponenten des Metabolischen Syndroms in gesunden Nachkommen von Typ 2 Diabetikern. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1221811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Heeren J, Tödter K, Seedorf K, Niederfellner G, Scheja L, Beisiegel U. Th-P15:125 Diet induced obesity in C57BL/6 mice is associated with substantial alterations in fatty acid composition in different organs and plasma lipoproteins. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82085-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abbadi S, Diercks H, Knöchel A, Gupta RS, Tödter K. Rapid procedures for the determination of radioactive strontium isotopes in food and environmental samples / Schnellverfahren zur Bestimmung von radioaktiven Strontiumisotopen in Lebensmitteln und Umweltproben. KERNTECHNIK 1997. [DOI: 10.1515/kern-1996-622-308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Alfaro J, Apfel T, Diercks H, Knöchel A, Gupta RS, Tödter K. Trace Analysis of the Radionuclides90Sr and89Sr in Environmental Samples III: Development of a Fast Analytical Method. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/anie.199501861] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Alfaro J, Apfel T, Diercks H, Knöchel A, Gupta RS, Tödter K. Spurenbestimmung der Radionuclide90Sr und89Sr in Umweltproben III: Entwicklung einer Schnellmethode. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951070213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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