201
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Davies LC, Rice CM, McVicar DW, Weiss JM. Diversity and environmental adaptation of phagocytic cell metabolism. J Leukoc Biol 2018; 105:37-48. [PMID: 30247792 PMCID: PMC6334519 DOI: 10.1002/jlb.4ri0518-195r] [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: 05/14/2018] [Revised: 08/20/2018] [Accepted: 08/22/2018] [Indexed: 12/29/2022] Open
Abstract
Phagocytes are cells of the immune system that play important roles in phagocytosis, respiratory burst and degranulation—key components of innate immunity and response to infection. This diverse group of cells includes monocytes, macrophages, dendritic cells, neutrophils, eosinophils, and basophils—heterogeneous cell populations possessing cell and tissue‐specific functions of which cellular metabolism comprises a critical underpinning. Core functions of phagocytic cells are diverse and sensitive to alterations in environmental‐ and tissue‐specific nutrients and growth factors. As phagocytic cells adapt to these extracellular cues, cellular processes are altered and may contribute to pathogenesis. The considerable degree of functional heterogeneity among monocyte, neutrophil, and other phagocytic cell populations necessitates diverse metabolism. As we review our current understanding of metabolism in phagocytic cells, gaps are focused on to highlight the need for additional studies that hopefully enable improved cell‐based strategies for counteracting cancer and other diseases.
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Affiliation(s)
- Luke C Davies
- Cancer & Inflammation Program, National Cancer Institute, Frederick, Maryland, USA.,Division of Infection & Immunity, School of Medicine, Cardiff University, Heath Park, UK
| | - Christopher M Rice
- Cancer & Inflammation Program, National Cancer Institute, Frederick, Maryland, USA
| | - Daniel W McVicar
- Cancer & Inflammation Program, National Cancer Institute, Frederick, Maryland, USA
| | - Jonathan M Weiss
- Cancer & Inflammation Program, National Cancer Institute, Frederick, Maryland, USA
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202
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Flores RE, Brown AK, Taus L, Khoury J, Glover F, Kami K, Sarangarajan R, Walshe TE, Narain NR, Kiebish MA, Shelton LM, Chinopoulos C, Seyfried TN. Mycoplasma infection and hypoxia initiate succinate accumulation and release in the VM-M3 cancer cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1859:975-983. [DOI: 10.1016/j.bbabio.2018.03.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 03/19/2018] [Indexed: 11/25/2022]
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203
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Meiser J, Kraemer L, Jaeger C, Madry H, Link A, Lepper PM, Hiller K, Schneider JG. Itaconic acid indicates cellular but not systemic immune system activation. Oncotarget 2018; 9:32098-32107. [PMID: 30181801 PMCID: PMC6114945 DOI: 10.18632/oncotarget.25956] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 07/27/2018] [Indexed: 11/25/2022] Open
Abstract
Itaconic acid is produced by mammalian leukocytes upon pro-inflammatory activation. It appears to inhibit bacterial growth and to rewire the metabolism of the host cell by inhibiting succinate dehydrogenase. Yet, it is unknown whether itaconic acid acts only intracellularly, locally in a paracrine fashion, or whether it is even secreted from the inflammatory cells at meaningful levels in peripheral blood of patients with severe inflammation or sepsis. The aim of this study was to determine the release rate of itaconic acid from pro-inflammatory activated macrophages in vitro and to test for the abundance of itaconic acid in bodyfluids of patients suffering from acute inflammation. We demonstrate that excretion of itaconic acid happens at a low rate and that it cannot be detected in significant amounts in plasma or urine of septic patients or in liquid from bronchial lavage of patients with pulmonary inflammation. We conclude that itaconic acid may serve as a pro-inflammatory marker in immune cells but that it does not qualify as a biomarker in the tested body fluids.
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Affiliation(s)
- Johannes Meiser
- Cancer Research UK Beatson Institute, Glasgow, UK.,University of Luxembourg, Luxembourg Centre for Systems Biomedicine, Luxembourg City, Luxembourg
| | - Lisa Kraemer
- Braunschweig Integrated Centre of Systems Biology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Christian Jaeger
- University of Luxembourg, Luxembourg Centre for Systems Biomedicine, Luxembourg City, Luxembourg
| | - Henning Madry
- Saarland University Medical Centre, Centre of Experimental Orthopaedics, Homburg, Germany
| | - Andreas Link
- Saarland University Medical Centre, Department of Internal Medicine II, Homburg, Germany
| | - Philipp M Lepper
- Saarland University Medical Centre, Department of Internal Medicine V, Homburg, Germany
| | - Karsten Hiller
- University of Luxembourg, Luxembourg Centre for Systems Biomedicine, Luxembourg City, Luxembourg.,Braunschweig Integrated Centre of Systems Biology, Technische Universität Braunschweig, Braunschweig, Germany.,Department of Computational Biology of Infection Research, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jochen G Schneider
- University of Luxembourg, Luxembourg Centre for Systems Biomedicine, Luxembourg City, Luxembourg.,Saarland University Medical Centre, Department of Internal Medicine II, Homburg, Germany.,Centre Hospitalier Emile Mayrisch, Esch, Luxembourg
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204
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Krebs Cycle Reimagined: The Emerging Roles of Succinate and Itaconate as Signal Transducers. Cell 2018; 174:780-784. [PMID: 30096309 DOI: 10.1016/j.cell.2018.07.030] [Citation(s) in RCA: 217] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/05/2018] [Accepted: 07/23/2018] [Indexed: 12/30/2022]
Abstract
Krebs cycle intermediates traditionally link to oxidative phosphorylation whilst also making key cell components. It is now clear that some of these metabolites also act as signals. Succinate plays an important role in inflammatory, hypoxic, and metabolic signaling, while itaconate (from another Krebs cycle intermediate, cis-aconitate) has an anti-inflammatory role.
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205
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Muir A, Danai LV, Vander Heiden MG. Microenvironmental regulation of cancer cell metabolism: implications for experimental design and translational studies. Dis Model Mech 2018; 11:dmm035758. [PMID: 30104199 PMCID: PMC6124553 DOI: 10.1242/dmm.035758] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cancers have an altered metabolism, and there is interest in understanding precisely how oncogenic transformation alters cellular metabolism and how these metabolic alterations can translate into therapeutic opportunities. Researchers are developing increasingly powerful experimental techniques to study cellular metabolism, and these techniques have allowed for the analysis of cancer cell metabolism, both in tumors and in ex vivo cancer models. These analyses show that, while factors intrinsic to cancer cells such as oncogenic mutations, alter cellular metabolism, cell-extrinsic microenvironmental factors also substantially contribute to the metabolic phenotype of cancer cells. These findings highlight that microenvironmental factors within the tumor, such as nutrient availability, physical properties of the extracellular matrix, and interactions with stromal cells, can influence the metabolic phenotype of cancer cells and might ultimately dictate the response to metabolically targeted therapies. In an effort to better understand and target cancer metabolism, this Review focuses on the experimental evidence that microenvironmental factors regulate tumor metabolism, and on the implications of these findings for choosing appropriate model systems and experimental approaches.
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Affiliation(s)
- Alexander Muir
- Koch Institute for Integrative Cancer Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Laura V Danai
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Matthew G Vander Heiden
- Koch Institute for Integrative Cancer Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
- Dana-Farber Cancer Institute, Boston, MA 02115, USA
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206
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Nelson VL, Nguyen HCB, Garcìa-Cañaveras JC, Briggs ER, Ho WY, DiSpirito JR, Marinis JM, Hill DA, Lazar MA. PPARγ is a nexus controlling alternative activation of macrophages via glutamine metabolism. Genes Dev 2018; 32:1035-1044. [PMID: 30006480 PMCID: PMC6075146 DOI: 10.1101/gad.312355.118] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/24/2018] [Indexed: 01/04/2023]
Abstract
The nuclear receptor peroxisome proliferator-activated receptor γ (PPARγ) is known to regulate lipid metabolism in many tissues, including macrophages. Here we report that peritoneal macrophage respiration is enhanced by rosiglitazone, an activating PPARγ ligand, in a PPARγ-dependent manner. Moreover, PPARγ is required for macrophage respiration even in the absence of exogenous ligand. Unexpectedly, the absence of PPARγ dramatically affects the oxidation of glutamine. Both glutamine and PPARγ have been implicated in alternative activation (AA) of macrophages, and PPARγ was required for interleukin 4 (IL4)-dependent gene expression and stimulation of macrophage respiration. Indeed, unstimulated macrophages lacking PPARγ contained elevated levels of the inflammation-associated metabolite itaconate and express a proinflammatory transcriptome that, remarkably, phenocopied that of macrophages depleted of glutamine. Thus, PPARγ functions as a checkpoint, guarding against inflammation, and is permissive for AA by facilitating glutamine metabolism. However, PPARγ expression is itself markedly increased by IL4. This suggests that PPARγ functions at the center of a feed-forward loop that is central to AA of macrophages.
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Affiliation(s)
- Victoria L Nelson
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Hoang C B Nguyen
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Juan C Garcìa-Cañaveras
- Lewis-Sigler Institute for Integrative Genomics, Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
| | - Erika R Briggs
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Wesley Y Ho
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Joanna R DiSpirito
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Jill M Marinis
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - David A Hill
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Allergy and Immunology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Mitchell A Lazar
- Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Philadelphia, Pennsylvania 19104, USA
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207
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Weiss JM, Davies LC, Karwan M, Ileva L, Ozaki MK, Cheng RY, Ridnour LA, Annunziata CM, Wink DA, McVicar DW. Itaconic acid mediates crosstalk between macrophage metabolism and peritoneal tumors. J Clin Invest 2018; 128:3794-3805. [PMID: 29920191 PMCID: PMC6118601 DOI: 10.1172/jci99169] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 06/12/2018] [Indexed: 12/13/2022] Open
Abstract
Control of cellular metabolism is critical for efficient cell function, although little is known about the interplay between cell subset–specific metabolites in situ, especially in the tumor setting. Here, we determined how a macrophage-specific (Mϕ-specific) metabolite, itaconic acid, can regulate tumor progression in the peritoneum. We show that peritoneal tumors (B16 melanoma or ID8 ovarian carcinoma) elicited a fatty acid oxidation–mediated increase in oxidative phosphorylation (OXPHOS) and glycolysis in peritoneal tissue–resident macrophages (pResMϕ). Unbiased metabolomics identified itaconic acid, the product of immune-responsive gene 1–mediated (Irg1-mediated) catabolism of mitochondrial cis-aconitate, among the most highly upregulated metabolites in pResMϕ of tumor-bearing mice. Administration of lentivirally encoded Irg1 shRNA significantly reduced peritoneal tumors. This resulted in reductions in OXPHOS and OXPHOS-driven production of ROS in pResMϕ and ROS-mediated MAPK activation in tumor cells. Our findings demonstrate that tumors profoundly alter pResMϕ metabolism, leading to the production of itaconic acid, which potentiates tumor growth. Monocytes isolated from ovarian carcinoma patients’ ascites fluid expressed significantly elevated levels of IRG1. Therefore, IRG1 in pResMϕ represents a potential therapeutic target for peritoneal tumors.
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Affiliation(s)
- Jonathan M Weiss
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute (NCI) at Frederick, Frederick, Maryland, USA
| | - Luke C Davies
- Cardiff University, Division of Infection and Immunity, Cardiff, United Kingdom
| | - Megan Karwan
- Frederick National Laboratory for Cancer Research, Leidos Biomedical Research Inc., Frederick, Maryland, USA
| | - Lilia Ileva
- Frederick National Laboratory for Cancer Research, Leidos Biomedical Research Inc., Frederick, Maryland, USA
| | - Michelle K Ozaki
- Women's Malignancies Branch, Center for Cancer Research (CCR), NCI, Bethesda, Maryland, USA
| | - Robert Ys Cheng
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute (NCI) at Frederick, Frederick, Maryland, USA
| | - Lisa A Ridnour
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute (NCI) at Frederick, Frederick, Maryland, USA
| | - Christina M Annunziata
- Women's Malignancies Branch, Center for Cancer Research (CCR), NCI, Bethesda, Maryland, USA
| | - David A Wink
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute (NCI) at Frederick, Frederick, Maryland, USA
| | - Daniel W McVicar
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute (NCI) at Frederick, Frederick, Maryland, USA
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208
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Nonnenmacher Y, Hiller K. Biochemistry of proinflammatory macrophage activation. Cell Mol Life Sci 2018; 75:2093-2109. [PMID: 29502308 PMCID: PMC5948278 DOI: 10.1007/s00018-018-2784-1] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/31/2018] [Accepted: 02/20/2018] [Indexed: 01/08/2023]
Abstract
In the last decade, metabolism has been recognized as a major determinant of immunological processes. During an inflammatory response, macrophages undergo striking changes in their metabolism. This metabolic reprogramming is governed by a complex interplay between metabolic enzymes and metabolites of different pathways and represents the basis for proper macrophage function. It is now evident that these changes go far beyond the well-known Warburg effect and the perturbation of metabolic targets is being investigated as a means to treat infections and auto-immune diseases. In the present review, we will aim to provide an overview of the metabolic responses during proinflammatory macrophage activation and show how these changes modulate the immune response.
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Affiliation(s)
- Yannic Nonnenmacher
- Department of Bioinformatics and Biochemistry and Braunschweig Integrated Center of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106, Brunswick, Germany
| | - Karsten Hiller
- Department of Bioinformatics and Biochemistry and Braunschweig Integrated Center of Systems Biology (BRICS), Technische Universität Braunschweig, Rebenring 56, 38106, Brunswick, Germany.
- Computational Biology of Infection Research, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Brunswick, Germany.
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209
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Sriram R, Nguyen J, Santos JD, Nguyen L, Sun J, Vigneron S, Van Criekinge M, Kurhanewicz J, MacKenzie JD. Molecular detection of inflammation in cell models using hyperpolarized 13C-pyruvate. Am J Cancer Res 2018; 8:3400-3407. [PMID: 29930738 PMCID: PMC6010986 DOI: 10.7150/thno.24322] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/16/2018] [Indexed: 12/27/2022] Open
Abstract
The detection and treatment monitoring of inflammatory states remain challenging in part due to the multifactorial mechanisms of immune activation and spectrum of clinical manifestations. Currently, diagnostic strategies tend to be subjective and limited quantitative tools exist to monitor optimal treatment strategies. Pro-inflammatory M1 polarized macrophages exhibit a distinct metabolic glycolytic phenotype compared to the continuum of M2 polarization states. In the present study, the distinct metabolic phenotypes of resting and activated macrophages were successfully characterized and quantified using hyperpolarized carbon-13 (13C) labeled pyruvate and its metabolic products, i.e. lactate, as a biomarker of resting, disease and treated states. Methods: Mouse macrophage J774A.1 cells were used as a model system in an NMR compatible bioreactor to facilitate dynamic hyperpolarized 13C measurements. The glycolytic metabolism of the cells in the quiescent or resting state were compared with macrophages stimulated by lipopolysaccharide, a classical M1 activator using hyperpolarized 13C labeled pyruvate. Additionally, the activated macrophages were also treated with a non-steroidal anti-inflammatory drug to assess the changes in hyperpolarized lactate signal. The hyperpolarized lactate signals were then correlated using biochemical and molecular assays. Results: We first validated our model system of inflammatory cells by the hallmarks of M1 polarization using steady state metabolic profiling with high resolution NMR in conjunction with nitric oxide Greiss assay, enzyme activity, and mRNA expression. Subsequently, we clearly showed that the cutting edge technology of hyperpolarized 13C NMR can be used to detect elevated lactate levels in M1 polarized macrophages in comparison to control and non-steroidal anti-inflammatory drug treated M2 states. Conclusion: Hyperpolarized 13C lactate has the potential to serve as a biomarker to non-invasively detect and quantify pro-inflammatory state of immune regulatory cells and its response to therapy.
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210
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Hanko EK, Minton NP, Malys N. A Transcription Factor-Based Biosensor for Detection of Itaconic Acid. ACS Synth Biol 2018; 7:1436-1446. [PMID: 29638114 PMCID: PMC6345495 DOI: 10.1021/acssynbio.8b00057] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Indexed: 12/19/2022]
Abstract
Itaconic acid is an important platform chemical that can easily be incorporated into polymers and has the potential to replace petrochemical-based acrylic or methacrylic acid. A number of microorganisms have been developed for the biosynthesis of itaconate including Aspergillus terreus, Escherichia coli, and Saccharomyces cerevisiae. However, the number of strains and conditions that can be tested for increased itaconate titers are currently limited because of the lack of high-throughput screening methods. Here we identified itaconate-inducible promoters and their corresponding LysR-type transcriptional regulators from Yersinia pseudotuberculosis and Pseudomonas aeruginosa. We show that the YpItcR/P ccl inducible system is highly inducible by itaconic acid in the model gammaproteobacterium E. coli and the betaproteobacterium Cupriavidus necator (215- and 105-fold, respectively). The kinetics and dynamics of the YpItcR/P ccl inducible system are investigated, and we demonstrate, that in addition to itaconate, the genetically encoded biosensor is capable of detecting mesaconate, cis-, and trans-aconitate in a dose-dependent manner. Moreover, the fluorescence-based biosensor is applied in E. coli to identify the optimum expression level of cadA, the product of which catalyzes the conversion of cis-aconitate into itaconate. The fluorescence output is shown to correlate well with itaconate concentrations quantified using high-performance liquid chromatography coupled with ultraviolet spectroscopy. This work highlights the potential of the YpItcR/P ccl inducible system to be applied as a biosensor for high-throughput microbial strain development to facilitate improved itaconate biosynthesis.
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Affiliation(s)
- Erik K.
R. Hanko
- BBSRC/EPSRC
Synthetic Biology Research Centre (SBRC), School of Life Sciences,
Centre for Biomolecular Sciences, The University
of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Nigel P. Minton
- BBSRC/EPSRC
Synthetic Biology Research Centre (SBRC), School of Life Sciences,
Centre for Biomolecular Sciences, The University
of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Naglis Malys
- BBSRC/EPSRC
Synthetic Biology Research Centre (SBRC), School of Life Sciences,
Centre for Biomolecular Sciences, The University
of Nottingham, Nottingham, NG7 2RD, United Kingdom
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211
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Mills EL, Ryan DG, Prag HA, Dikovskaya D, Menon D, Zaslona Z, Jedrychowski MP, Costa ASH, Higgins M, Hams E, Szpyt J, Runtsch MC, King MS, McGouran JF, Fischer R, Kessler BM, McGettrick AF, Hughes MM, Carroll RG, Booty LM, Knatko EV, Meakin PJ, Ashford MLJ, Modis LK, Brunori G, Sévin DC, Fallon PG, Caldwell ST, Kunji ERS, Chouchani ET, Frezza C, Dinkova-Kostova AT, Hartley RC, Murphy MP, O'Neill LA. Itaconate is an anti-inflammatory metabolite that activates Nrf2 via alkylation of KEAP1. Nature 2018; 556:113-117. [PMID: 29590092 PMCID: PMC6047741 DOI: 10.1038/nature25986] [Citation(s) in RCA: 1028] [Impact Index Per Article: 171.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 02/09/2018] [Indexed: 02/02/2023]
Abstract
The endogenous metabolite itaconate has recently emerged as a regulator of macrophage function, but its precise mechanism of action remains poorly understood. Here we show that itaconate is required for the activation of the anti-inflammatory transcription factor Nrf2 (also known as NFE2L2) by lipopolysaccharide in mouse and human macrophages. We find that itaconate directly modifies proteins via alkylation of cysteine residues. Itaconate alkylates cysteine residues 151, 257, 288, 273 and 297 on the protein KEAP1, enabling Nrf2 to increase the expression of downstream genes with anti-oxidant and anti-inflammatory capacities. The activation of Nrf2 is required for the anti-inflammatory action of itaconate. We describe the use of a new cell-permeable itaconate derivative, 4-octyl itaconate, which is protective against lipopolysaccharide-induced lethality in vivo and decreases cytokine production. We show that type I interferons boost the expression of Irg1 (also known as Acod1) and itaconate production. Furthermore, we find that itaconate production limits the type I interferon response, indicating a negative feedback loop that involves interferons and itaconate. Our findings demonstrate that itaconate is a crucial anti-inflammatory metabolite that acts via Nrf2 to limit inflammation and modulate type I interferons.
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Affiliation(s)
- Evanna L Mills
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA
- GlaxoSmithKline, Gunnelswood Road, Stevenage, Hertfordshire, UK
| | - Dylan G Ryan
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Hiran A Prag
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Dina Dikovskaya
- Jacqui Wood Cancer Centre, Division of Cancer Research, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Deepthi Menon
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Zbigniew Zaslona
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Mark P Jedrychowski
- Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Ana S H Costa
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - Maureen Higgins
- Jacqui Wood Cancer Centre, Division of Cancer Research, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Emily Hams
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - John Szpyt
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Marah C Runtsch
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Martin S King
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Joanna F McGouran
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Roman Fischer
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford OX3 7FZ, UK
| | - Benedikt M Kessler
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford OX3 7FZ, UK
| | - Anne F McGettrick
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Mark M Hughes
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Richard G Carroll
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- GlaxoSmithKline, Gunnelswood Road, Stevenage, Hertfordshire, UK
| | - Lee M Booty
- GlaxoSmithKline, Gunnelswood Road, Stevenage, Hertfordshire, UK
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Elena V Knatko
- Jacqui Wood Cancer Centre, Division of Cancer Research, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Paul J Meakin
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Michael L J Ashford
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Louise K Modis
- GlaxoSmithKline, Gunnelswood Road, Stevenage, Hertfordshire, UK
| | - Gino Brunori
- GlaxoSmithKline, Park Road, Ware, Hertfordshire, UK
| | | | - Padraic G Fallon
- School of Medicine, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Stuart T Caldwell
- WestCHEM School of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK
| | - Edmund R S Kunji
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Edward T Chouchani
- Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Christian Frezza
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - Albena T Dinkova-Kostova
- Jacqui Wood Cancer Centre, Division of Cancer Research, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Richard C Hartley
- WestCHEM School of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Luke A O'Neill
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- GlaxoSmithKline, Gunnelswood Road, Stevenage, Hertfordshire, UK
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212
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213
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Metabolic characterization of serum from mice challenged with Orientia tsutsugamushi-infected mites. New Microbes New Infect 2018; 23:70-76. [PMID: 29692908 PMCID: PMC5913361 DOI: 10.1016/j.nmni.2018.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 01/18/2018] [Accepted: 01/18/2018] [Indexed: 01/31/2023] Open
Abstract
Scrub typhus is an acute zoonosis caused by the obligate intracellular Gram-negative bacterium Orientia tsutsugamushi. To better understand the host response elicited by natural infection by chigger feeding, ICR mice were infected by Leptotrombidium chiangraiensis (Lc1) chiggers, and the metabolic profiles of their serum were examined over several time points after initiation of feeding. ICR mice were infected by either naive Lc1 chiggers (i.e. not infected by O. tsutsugamushi, NLc1) or O. tsutsugamushi–infected Lc1 chiggers (OLc1). Serum was collected from both groups of mice at 6 hours and 10 days after initiation of feeding. Metabolites were extracted from the serum and analysed by ultra performance liquid chromatography–tandem mass spectrometry. The resulting ion/chromatographic features were matched to a library of chemical standards for identification and quantification. Biochemicals that differed significantly between the experimental groups were identified using Welch's two-sample t tests; p ≤ 0.05 was considered statistically significant. A number of biochemicals linked to immune function were found to be significantly altered between mice infected by the NLc1 and OLc1 chiggers, including itaconate, kynurenine and histamine. Several metabolites linked to energy production were also found to be altered in the animals. In addition lipid and carbohydrate metabolism, bile acid and phospholipid homeostasis, and nucleotide metabolism were also found to be different in these two groups of mice. Markers of stress and food intake were also significantly altered. Global untargeted metabolomic characterization revealed significant differences in the biochemical profiles of mice infected by the NLc1 versus OLc1 chiggers. These findings provide an important platform for further investigation of the host responses associated with chigger-borne O. tsutsugamushi infections.
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Abstract
Traditionally cellular respiration or metabolism has been viewed as catabolic and anabolic pathways generating energy and biosynthetic precursors required for growth and general cellular maintenance. However, growing literature provides evidence of a much broader role for metabolic reactions and processes in controlling immunological effector functions. Much of this research into immunometabolism has focused on macrophages, cells that are central in pro- as well as anti-inflammatory responses—responses that in turn are a direct result of metabolic reprogramming. As we learn more about the precise role of metabolic pathways and pathway intermediates in immune function, a novel opportunity to target immunometabolism therapeutically has emerged. Here, we review the current understanding of the regulation of macrophage function through metabolic remodeling.
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Affiliation(s)
- Ciana Diskin
- School of Biochemistry and Immunology, Trinity College Dublin, Trinity Biomedical Science Institute, Dublin, Ireland
| | - Eva M Pålsson-McDermott
- School of Biochemistry and Immunology, Trinity College Dublin, Trinity Biomedical Science Institute, Dublin, Ireland
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215
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Almeida GMDF, Silva LCF, Colson P, Abrahao JS. Mimiviruses and the Human Interferon System: Viral Evasion of Classical Antiviral Activities, But Inhibition By a Novel Interferon-β Regulated Immunomodulatory Pathway. J Interferon Cytokine Res 2018; 37:1-8. [PMID: 28079476 DOI: 10.1089/jir.2016.0097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In this review we discuss the role of mimiviruses as potential human pathogens focusing on clinical and evolutionary evidence. We also propose a novel antiviral immunomodulatory pathway controlled by interferon-β (IFN-β) and mediated by immune-responsive gene 1 (IRG1) and itaconic acid, its product. Acanthamoeba polyphaga Mimivirus (APMV) was isolated from amoebae in a hospital while investigating a pneumonia outbreak. Mimivirus ubiquity and role as protist pathogens are well understood, and its putative status as a human pathogen has been gaining strength as more evidence is being found. The study of APMV and human cells interaction revealed that the virus is able to evade the IFN system by inhibiting the regulation of interferon-stimulated genes, suggesting that the virus and humans have had host-pathogen interactions. It also has shown that the virus is capable of growing on IFN-α2, but not on IFN-β-treated cells, hinting at an exclusive IFN-β antiviral pathway. Our hypothesis based on preliminary data and published articles is that IFN-β preferentially upregulates IRG1 in human macrophagic cells, which in turn produces itaconic acid. This metabolite links metabolism to antiviral activity by inactivating the virus, in a novel immunomodulatory pathway relevant for APMV infections and probably to other infectious diseases as well.
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Affiliation(s)
| | - Lorena C Ferreira Silva
- 2 Laboratorio de Virus, Departamento de Microbiologia, Universidade Federal de Minas Gerais , Belo Horizonte, Brazil
| | - Philippe Colson
- 3 Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Universite Faculté de Médecine , Marseille, France
| | - Jonatas Santos Abrahao
- 2 Laboratorio de Virus, Departamento de Microbiologia, Universidade Federal de Minas Gerais , Belo Horizonte, Brazil .,3 Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), Aix-Marseille Universite Faculté de Médecine , Marseille, France
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216
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Stocks CJ, Schembri MA, Sweet MJ, Kapetanovic R. For when bacterial infections persist: Toll-like receptor-inducible direct antimicrobial pathways in macrophages. J Leukoc Biol 2018; 103:35-51. [PMID: 29345056 DOI: 10.1002/jlb.4ri0917-358r] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 10/19/2017] [Accepted: 10/19/2017] [Indexed: 12/18/2022] Open
Abstract
Macrophages are linchpins of innate immunity, responding to invading microorganisms by initiating coordinated inflammatory and antimicrobial programs. Immediate antimicrobial responses, such as NADPH-dependent reactive oxygen species (ROS), are triggered upon phagocytic receptor engagement. Macrophages also detect and respond to microbial products through pattern recognition receptors (PRRs), such as TLRs. TLR signaling influences multiple biological processes including antigen presentation, cell survival, inflammation, and direct antimicrobial responses. The latter enables macrophages to combat infectious agents that persist within the intracellular environment. In this review, we summarize our current understanding of TLR-inducible direct antimicrobial responses that macrophages employ against bacterial pathogens, with a focus on emerging evidence linking TLR signaling to reprogramming of mitochondrial functions to enable the production of direct antimicrobial agents such as ROS and itaconic acid. In addition, we describe other TLR-inducible antimicrobial pathways, including autophagy/mitophagy, modulation of nutrient availability, metal ion toxicity, reactive nitrogen species, immune GTPases (immunity-related GTPases and guanylate-binding proteins), and antimicrobial peptides. We also describe examples of mechanisms of evasion of such pathways by professional intramacrophage pathogens, with a focus on Salmonella, Mycobacteria, and Listeria. An understanding of how TLR-inducible direct antimicrobial responses are regulated, as well as how bacterial pathogens subvert such pathways, may provide new opportunities for manipulating host defence to combat infectious diseases.
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Affiliation(s)
- Claudia J Stocks
- Institute for Molecular Bioscience (IMB) and IMB Centre for Inflammation and Disease Research, The University of Queensland, Brisbane, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Mark A Schembri
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Matthew J Sweet
- Institute for Molecular Bioscience (IMB) and IMB Centre for Inflammation and Disease Research, The University of Queensland, Brisbane, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Ronan Kapetanovic
- Institute for Molecular Bioscience (IMB) and IMB Centre for Inflammation and Disease Research, The University of Queensland, Brisbane, Queensland, Australia.,Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia
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217
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Han P, Huang Y, Xie Y, Yang W, Xiang W, Hylands PJ, Legido-Quigley C. Metabolomics reveals immunomodulation as a possible mechanism for the antibiotic effect of Persicaria capitata (Buch.-Ham. ex D. Don) H.Gross. Metabolomics 2018; 14:91. [PMID: 30008628 PMCID: PMC6019430 DOI: 10.1007/s11306-018-1388-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/15/2018] [Indexed: 12/02/2022]
Abstract
INTRODUCTION In spite of advances in antibiotics, urinary tract infection (UTI) is still among the most common reasons for antibiotic medication worldwide. Persicaria capitata (Buch.-Ham. ex D. Don) H.Gross (P. capitata) is a herbal medicine used by the Miao people in China to treat UTI. However studies of its mechanism are challenging, owing to the complexity of P. capitata with multiple constituents acting on multiple metabolic pathways. OBJECTIVE The objective of this study was to explore the working mechanism of P. capitata on urinary tract infection. METHODS Relinqing® granule, which is solely made from aqueous extracts of the whole P. capitata plant, was used in this study. Urine metabolomics based on gas chromatography-mass spectroscopy was employed to assess the metabolic changes caused by administration of Relinqing® granule in a UTI mouse model. Female specific-pathogen-free Kunming mice were divided into control group (mock infection, saline treatment), model group (E.coli infection, saline treatment), Relinqing® group (E.coli infection, Relinqing® granule treatment), ciprofloxacin group (E.coli infection, ciprofloxacin treatment), and sham-Relinqing® group (no surgery, Relinqing® granule treatment). RESULTS The results showed that after the treatments, urine levels of itaconic acid in Relinqing® group increased by 4.9 fold and 11.3 fold compared with model and ciprofloxacin groups respectively. Itaconic acid is an endogenous antibacterial metabolite produced by macrophages, which also functions as a checkpoint for metabolic reprogramming of macrophage. CONCLUSION Our findings suggest that this herbal medicine can cure urinary tract infection through modulation of immune system.
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Affiliation(s)
- Pei Han
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, UK
| | - Yong Huang
- Provincial Key Laboratory of Pharmaceutics in Guizhou Province, School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Yumin Xie
- Provincial Key Laboratory of Pharmaceutics in Guizhou Province, School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Wu Yang
- Provincial Key Laboratory of Pharmaceutics in Guizhou Province, School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Wenying Xiang
- Provincial Key Laboratory of Pharmaceutics in Guizhou Province, School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Peter J Hylands
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, UK.
| | - Cristina Legido-Quigley
- Institute of Pharmaceutical Science, Faculty of Life Sciences & Medicine, King's College London, London, SE1 9NH, UK.
- The Systems Medicine Group, Steno Diabetes Center, Gentofte, Denmark.
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218
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Shen H, Campanello GC, Flicker D, Grabarek Z, Hu J, Luo C, Banerjee R, Mootha VK. The Human Knockout Gene CLYBL Connects Itaconate to Vitamin B 12. Cell 2017; 171:771-782.e11. [PMID: 29056341 PMCID: PMC5827971 DOI: 10.1016/j.cell.2017.09.051] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/17/2017] [Accepted: 09/28/2017] [Indexed: 11/27/2022]
Abstract
CLYBL encodes a ubiquitously expressed mitochondrial enzyme, conserved across all vertebrates, whose cellular activity and pathway assignment are unknown. Its homozygous loss is tolerated in seemingly healthy individuals, with reduced circulating B12 levels being the only and consistent phenotype reported to date. Here, by combining enzymology, structural biology, and activity-based metabolomics, we report that CLYBL operates as a citramalyl-CoA lyase in mammalian cells. Cells lacking CLYBL accumulate citramalyl-CoA, an intermediate in the C5-dicarboxylate metabolic pathway that includes itaconate, a recently identified human anti-microbial metabolite and immunomodulator. We report that CLYBL loss leads to a cell-autonomous defect in the mitochondrial B12 metabolism and that itaconyl-CoA is a cofactor-inactivating, substrate-analog inhibitor of the mitochondrial B12-dependent methylmalonyl-CoA mutase (MUT). Our work de-orphans the function of human CLYBL and reveals that a consequence of exposure to the immunomodulatory metabolite itaconate is B12 inactivation.
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Affiliation(s)
- Hongying Shen
- Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute, Cambridge, MA 02141, USA
| | - Gregory C Campanello
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Daniel Flicker
- Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute, Cambridge, MA 02141, USA
| | - Zenon Grabarek
- Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Broad Institute, Cambridge, MA 02141, USA
| | - Junchi Hu
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China
| | - Cheng Luo
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ruma Banerjee
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Vamsi K Mootha
- Howard Hughes Medical Institute and Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute, Cambridge, MA 02141, USA.
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219
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Wu X, Liu Q, Deng Y, Li J, Chen X, Gu Y, Lv X, Zheng Z, Jiang S, Li X. Production of itaconic acid by biotransformation of wheat bran hydrolysate with Aspergillus terreus CICC40205 mutant. BIORESOURCE TECHNOLOGY 2017; 241:25-34. [PMID: 28550772 DOI: 10.1016/j.biortech.2017.05.080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/12/2017] [Accepted: 05/13/2017] [Indexed: 05/28/2023]
Abstract
The replacement of the carbon source in the microbial production of itaconic acid (IA) with economic alternatives has attracted significant attention. In this study, an Aspergillus terreus CICC40205 mutant was used to increase the IA titer and decrease the citric acid titer in the wheat bran hydrolysate compared with the parental strain. The results showed that the IA titer was increased by 33.4%, whereas the citric acid titer was decreased by 75.8%, and were in accordance with those of the improved pathway of co-metabolism of glucose and xylose according to the metabolic flux analysis. Additionally, the maximum IA titer obtained in a 7-L stirred tank was 49.65gL-1±0.38gL-1. Overall, A. terreus CICC40205 showed a great potential for the industrial production of IA through the biotransformation of the wheat bran hydrolysate.
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Affiliation(s)
- Xuefeng Wu
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China; Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei, Anhui Province 230009, PR China
| | - Qing Liu
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China
| | - Yongdong Deng
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China
| | - Jinghong Li
- China Rural Technology Development Center, Beijing 100045, PR China
| | - Xiaoju Chen
- College of Chemistry and Material Engineering, Chaohu University, Hefei, Anhui Province 238000, PR China
| | - Yongzhong Gu
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China
| | - Xijun Lv
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China
| | - Zhi Zheng
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China; Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei, Anhui Province 230009, PR China
| | - Shaotong Jiang
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China; Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei, Anhui Province 230009, PR China
| | - Xingjiang Li
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui Province 230009, PR China; Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei, Anhui Province 230009, PR China.
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220
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Aurich MK, Fleming RMT, Thiele I. A systems approach reveals distinct metabolic strategies among the NCI-60 cancer cell lines. PLoS Comput Biol 2017; 13:e1005698. [PMID: 28806730 PMCID: PMC5570491 DOI: 10.1371/journal.pcbi.1005698] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 08/24/2017] [Accepted: 07/24/2017] [Indexed: 11/19/2022] Open
Abstract
The metabolic phenotype of cancer cells is reflected by the metabolites they consume and by the byproducts they release. Here, we use quantitative, extracellular metabolomic data of the NCI-60 panel and a novel computational method to generate 120 condition-specific cancer cell line metabolic models. These condition-specific cancer models used distinct metabolic strategies to generate energy and cofactors. The analysis of the models' capability to deal with environmental perturbations revealed three oxotypes, differing in the range of allowable oxygen uptake rates. Interestingly, models based on metabolomic profiles of melanoma cells were distinguished from other models through their low oxygen uptake rates, which were associated with a glycolytic phenotype. A subset of the melanoma cell models required reductive carboxylation. The analysis of protein and RNA expression levels from the Human Protein Atlas showed that IDH2, which was an essential gene in the melanoma models, but not IDH1 protein, was detected in normal skin cell types and melanoma. Moreover, the von Hippel-Lindau tumor suppressor (VHL) protein, whose loss is associated with non-hypoxic HIF-stabilization, reductive carboxylation, and promotion of glycolysis, was uniformly absent in melanoma. Thus, the experimental data supported the predicted role of IDH2 and the absence of VHL protein supported the glycolytic and low oxygen phenotype predicted for melanoma. Taken together, our approach of integrating extracellular metabolomic data with metabolic modeling and the combination of different network interrogation methods allowed insights into the metabolism of cells.
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Affiliation(s)
- Maike K. Aurich
- Luxembourg Center for Systems Biomedicine, University of Luxembourg, Esch-Sur-Alzette, Luxembourg
| | - Ronan M. T. Fleming
- Luxembourg Center for Systems Biomedicine, University of Luxembourg, Esch-Sur-Alzette, Luxembourg
| | - Ines Thiele
- Luxembourg Center for Systems Biomedicine, University of Luxembourg, Esch-Sur-Alzette, Luxembourg
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221
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Saborano R, Wongpinyochit T, Totten JD, Johnston BF, Seib FP, Duarte IF. Metabolic Reprogramming of Macrophages Exposed to Silk, Poly(lactic-co-glycolic acid), and Silica Nanoparticles. Adv Healthc Mater 2017; 6. [PMID: 28544603 DOI: 10.1002/adhm.201601240] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/28/2017] [Indexed: 12/27/2022]
Abstract
Monitoring macrophage metabolism in response to nanoparticle exposure provides new insights into biological outcomes, such as inflammation or toxicity, and supports the design of tailored nanomedicines. This paper describes the metabolic signature of macrophages exposed to nanoparticles ranging in diameter from 100 to 125 nm and made from silk, poly(lactic-co-glycolic acid) or silica. Nanoparticles of this size and type are currently at various stages of preclinical and clinical development for drug delivery applications. 1 H NMR analysis of cell extracts and culture media is used to quantify the changes in the intracellular and extracellular metabolomes of macrophages in response to nanoparticle exposure. Increased glycolytic activity, an altered tricarboxylic acid cycle, and reduced ATP generation are consistent with a proinflammatory phenotype. Furthermore, amino acids possibly arising from autophagy, the creatine kinase/phosphocreatine system, and a few osmolytes and antioxidants emerge as important players in the metabolic reprogramming of macrophages exposed to nanoparticles. This metabolic signature is a common response to all nanoparticles tested; however, the direction and magnitude of some variations are clearly nanoparticle specific, indicating material-induced biological specificity. Overall, metabolic reprogramming of macrophages can be achieved with nanoparticle treatments, modulated through the choice of the material, and monitored using 1 H NMR metabolomics.
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Affiliation(s)
- Raquel Saborano
- CICECO - Aveiro Institute of Materials; Department of Chemistry; University of Aveiro; 3810-193 Aveiro Portugal
| | - Thidarat Wongpinyochit
- Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161 Cathedral Street Glasgow G4 0RE UK
| | - John D. Totten
- Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161 Cathedral Street Glasgow G4 0RE UK
| | - Blair F. Johnston
- Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161 Cathedral Street Glasgow G4 0RE UK
| | - F. Philipp Seib
- Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161 Cathedral Street Glasgow G4 0RE UK
- Leibniz-Institut für Polymerforschung Dresden e.V.; Max Bergmann Centre of Biomaterials Dresden; Hohe Strasse 6 01069 Dresden Germany
| | - Iola F. Duarte
- CICECO - Aveiro Institute of Materials; Department of Chemistry; University of Aveiro; 3810-193 Aveiro Portugal
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222
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Bafana R, Pandey RA. New approaches for itaconic acid production: bottlenecks and possible remedies. Crit Rev Biotechnol 2017; 38:68-82. [DOI: 10.1080/07388551.2017.1312268] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Richa Bafana
- AcSIR (Academy of Scientific & Innovative Research), CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, India
| | - R. A. Pandey
- AcSIR (Academy of Scientific & Innovative Research), CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, India
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223
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ElAzzouny M, Tom CTMB, Evans CR, Olson LL, Tanga MJ, Gallagher KA, Martin BR, Burant CF. Dimethyl Itaconate Is Not Metabolized into Itaconate Intracellularly. J Biol Chem 2017; 292:4766-4769. [PMID: 28188288 PMCID: PMC5377792 DOI: 10.1074/jbc.c117.775270] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/07/2017] [Indexed: 01/12/2023] Open
Abstract
Itaconic acid is an important metabolite produced by macrophages after stimulation with LPS. The role of itaconate in the inflammatory cascade is unclear. Here we used [13C]itaconate and dimethyl [13C]itaconate (DMI) to probe itaconate metabolism, and find that [13C]DMI is not metabolized to itaconate. [13C]Itaconate in the cell culture medium leads to elevated intracellular levels of unlabeled succinate, with no evidence of intracellular uptake. The goal of this study is to encourage the development of effective pro-drug strategies to increase the intracellular levels of itaconate, which will enable more conclusive analysis of its action on macrophages and other cell and tissue types.
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224
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Fritsch SD, Weichhart T. Effects of Interferons and Viruses on Metabolism. Front Immunol 2016; 7:630. [PMID: 28066439 PMCID: PMC5174094 DOI: 10.3389/fimmu.2016.00630] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 12/08/2016] [Indexed: 12/12/2022] Open
Abstract
Interferons (IFNs) are potent pleiotropic cytokines that broadly alter cellular functions in response to viral and other infections. These alterations include changes in protein synthesis, proliferation, membrane composition, and the nutritional microenvironment. Recent evidence suggests that antiviral responses are supported by an IFN-induced rewiring of the cellular metabolism. In this review, we discuss the roles of type I and type II IFNs in regulating the cellular metabolism and biosynthetic reactions. Furthermore, we give an overview of how viruses themselves affect these metabolic activities to promote their replication. In addition, we focus on the lipid as well as amino acid metabolisms, through which IFNs exert potent antiviral and immunomodulatory activities. Conversely, the expression of IFNs is controlled by the nutrient sensor mammalian target of rapamycin or by direct reprograming of lipid metabolic pathways. These findings establish a mutual relationship between IFN production and metabolic core processes.
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Affiliation(s)
| | - Thomas Weichhart
- Institute of Medical Genetics, Medical University of Vienna , Vienna , Austria
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225
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Lachmandas E, Boutens L, Ratter JM, Hijmans A, Hooiveld GJ, Joosten LAB, Rodenburg RJ, Fransen JAM, Houtkooper RH, van Crevel R, Netea MG, Stienstra R. Microbial stimulation of different Toll-like receptor signalling pathways induces diverse metabolic programmes in human monocytes. Nat Microbiol 2016; 2:16246. [PMID: 27991883 DOI: 10.1038/nmicrobiol.2016.246] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 11/04/2016] [Indexed: 01/16/2023]
Abstract
Microbial stimuli such as lipopolysaccharide (LPS) induce robust metabolic rewiring in immune cells known as the Warburg effect. It is unknown whether this increase in glycolysis and decrease in oxidative phosphorylation (OXPHOS) is a general characteristic of monocytes that have encountered a pathogen. Using CD14+ monocytes from healthy donors, we demonstrated that most microbial stimuli increased glycolysis, but that only stimulation of Toll-like receptor (TLR) 4 with LPS led to a decrease in OXPHOS. Instead, activation of other TLRs, such as TLR2 activation by Pam3CysSK4 (P3C), increased oxygen consumption and mitochondrial enzyme activity. Transcriptome and metabolome analysis of monocytes stimulated with P3C versus LPS confirmed the divergent metabolic responses between both stimuli, and revealed significant differences in the tricarboxylic acid cycle, OXPHOS and lipid metabolism pathways following stimulation of monocytes with P3C versus LPS. At a functional level, pharmacological inhibition of complex I of the mitochondrial electron transport chain diminished cytokine production and phagocytosis in P3C- but not LPS-stimulated monocytes. Thus, unlike LPS, complex microbial stimuli and the TLR2 ligand P3C induce a specific pattern of metabolic rewiring that involves upregulation of both glycolysis and OXPHOS, which enables activation of host defence mechanisms such as cytokine production and phagocytosis.
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Affiliation(s)
- Ekta Lachmandas
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands
| | - Lily Boutens
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands.,Nutrition, Metabolism and Genomics Group, Division of Human Nutrition, Wageningen University, 6708 WE, Wageningen, The Netherlands
| | - Jacqueline M Ratter
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands.,Nutrition, Metabolism and Genomics Group, Division of Human Nutrition, Wageningen University, 6708 WE, Wageningen, The Netherlands
| | - Anneke Hijmans
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands
| | - Guido J Hooiveld
- Nutrition, Metabolism and Genomics Group, Division of Human Nutrition, Wageningen University, 6708 WE, Wageningen, The Netherlands
| | - Leo A B Joosten
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands
| | - Richard J Rodenburg
- Department of Pediatrics, Radboud Center for Mitochondrial Medicine, 774 Translational Metabolic Laboratory, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands
| | - Jack A M Fransen
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 1105 AZ, Nijmegen, The Netherlands
| | - Riekelt H Houtkooper
- Laboratory Genetic Metabolic Diseases, Academic Medical Center, 1105 AZ, Amsterdam, The Netherlands
| | - Reinout van Crevel
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands
| | - Rinke Stienstra
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, 6525 GA, Nijmegen, The Netherlands.,Nutrition, Metabolism and Genomics Group, Division of Human Nutrition, Wageningen University, 6708 WE, Wageningen, The Netherlands
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226
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Steiger MG, Wierckx N, Blank LM, Mattanovich D, Sauer M. Itaconic Acid - An Emerging Building Block. Ind Biotechnol (New Rochelle N Y) 2016. [DOI: 10.1002/9783527807833.ch15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Matthias G. Steiger
- Austrian Centre of Industrial Biotechnology (ACIB GmbH); Muthgasse 18 1190 Vienna Austria
- University of Natural Resources and Life Sciences Vienna; Department of Biotechnology; Muthgasse 18 1190 Vienna Austria
| | - Nick Wierckx
- RWTH Aachen University; Institute of Applied Microbiology; Worringerweg 1 D52074 Aachen Germany
| | - Lars M. Blank
- RWTH Aachen University; Institute of Applied Microbiology; Worringerweg 1 D52074 Aachen Germany
| | - Diethard Mattanovich
- Austrian Centre of Industrial Biotechnology (ACIB GmbH); Muthgasse 18 1190 Vienna Austria
- University of Natural Resources and Life Sciences Vienna; Department of Biotechnology; Muthgasse 18 1190 Vienna Austria
| | - Michael Sauer
- Austrian Centre of Industrial Biotechnology (ACIB GmbH); Muthgasse 18 1190 Vienna Austria
- University of Natural Resources and Life Sciences Vienna; Department of Biotechnology; Muthgasse 18 1190 Vienna Austria
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227
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Michopoulos F, Karagianni N, Whalley NM, Firth MA, Nikolaou C, Wilson ID, Critchlow SE, Kollias G, Theodoridis GA. Targeted Metabolic Profiling of the Tg197 Mouse Model Reveals Itaconic Acid as a Marker of Rheumatoid Arthritis. J Proteome Res 2016; 15:4579-4590. [PMID: 27704840 DOI: 10.1021/acs.jproteome.6b00654] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rheumatoid arthritis is a progressive, highly debilitating disease where early diagnosis, enabling rapid clinical intervention, would provide obvious benefits to patients, healthcare systems, and society. Novel biomarkers that enable noninvasive early diagnosis of the onset and progression of the disease provide one route to achieving this goal. Here a metabolic profiling method has been applied to investigate disease development in the Tg197 arthritis mouse model. Hind limb extract profiling demonstrated clear differences in metabolic phenotypes between control (wild type) and Tg197 transgenic mice and highlighted raised concentrations of itaconic acid as a potential marker of the disease. These changes in itaconic acid concentrations were moderated or indeed reversed when the Tg197 mice were treated with the anti-hTNF biologic infliximab (10 mg/kg twice weekly for 6 weeks). Further in vitro studies on synovial fibroblasts obtained from healthy wild-type, arthritic Tg197, and infliximab-treated Tg197 transgenic mice confirmed the association of itaconic acid with rheumatoid arthritis and disease-moderating drug effects. Preliminary indications of the potential value of itaconic acid as a translational biomarker were obtained when studies on K4IM human fibroblasts treated with hTNF showed an increase in the concentrations of this metabolite.
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Affiliation(s)
- Filippos Michopoulos
- Bioscience, Oncology iMED, AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom.,Department of Chemistry, Aristotle University of Thessaloniki , Thessaloniki 541 24, Greece
| | | | - Nichola M Whalley
- Bioscience, Oncology iMED, AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Mike A Firth
- Discovery Science, iMED, AstraZeneca, Cambridge CB4 0FZ, United Kingdom
| | - Christoforos Nikolaou
- Biomedical Siences Research Center "Alexander Fleming", 34 Fleming Street, Vari 16672, Greece.,Department of Biology, University of Crete , Heraklion 741 00, Greece
| | - Ian D Wilson
- Department of Surgery and Cancer, Imperial College , London SW7 2AZ, United Kingdom
| | - Susan E Critchlow
- Bioscience, Oncology iMED, AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - George Kollias
- Biomedical Siences Research Center "Alexander Fleming", 34 Fleming Street, Vari 16672, Greece.,Department of Physiology, Faculty of Medicine, National and Kapodistrian University of Athens , Athens 11527, Greece
| | - Georgios A Theodoridis
- Department of Chemistry, Aristotle University of Thessaloniki , Thessaloniki 541 24, Greece
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228
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Metabolic reprogramming & inflammation: Fuelling the host response to pathogens. Semin Immunol 2016; 28:450-468. [PMID: 27780657 DOI: 10.1016/j.smim.2016.10.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/14/2016] [Accepted: 10/17/2016] [Indexed: 12/24/2022]
Abstract
Successful immune responses to pathogens rely on efficient host innate processes to contain and limit bacterial growth, induce inflammatory response and promote antigen presentation for the development of adaptive immunity. This energy intensive process is regulated through multiple mechanisms including receptor-mediated signaling, control of phago-lysomal fusion events and promotion of bactericidal activities. Inherent macrophage activities therefore are dynamic and are modulated by signals and changes in the environment during infection. So too does the way these cells obtain their energy to adapt to altered homeostasis. It has emerged recently that the pathways employed by immune cells to derive energy from available or preferred nutrients underline the dynamic changes associated with immune activation. In particular, key breakpoints have been identified in the metabolism of glucose and lipids which direct not just how cells derive energy in the form of ATP, but also cellular phenotype and activation status. Much of this comes about through altered flux and accumulation of intermediate metabolites. How these changes in metabolism directly impact on the key processes required for anti-microbial immunity however, is less obvious. Here, we examine the 2 key nutrient utilization pathways employed by innate cells to fuel central energy metabolism and examine how these are altered in response to activation during infection, emphasising how certain metabolic switches or 'reprogramming' impacts anti-microbial processes. By examining carbohydrate and lipid pathways and how the flux of key intermediates intersects with innate immune signaling and the induction of bactericidal activities, we hope to illustrate the importance of these metabolic switches for protective immunity and provide a potential mechanism for how altered metabolic conditions in humans such as diabetes and hyperlipidemia alter the host response to infection.
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229
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Abstract
Macrophages are heterogeneous cells that play a key role in inflammatory and tissue reparative responses. Over the past decade it has become clear that shifts in cellular metabolism are important determinants of macrophage function and phenotype. At the same time, our appreciation of macrophage diversity in vivo has also been increasing. Factors such as cell origin and tissue localization are now recognized as important variables that influence macrophage biology. Whether different macrophage populations also have unique metabolic phenotypes has not been extensively explored. In this article, we will discuss the importance of understanding how macrophage origin can modulate metabolic programming and influence inflammatory responses.
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230
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Baseler WA, Davies LC, Quigley L, Ridnour LA, Weiss JM, Hussain SP, Wink DA, McVicar DW. Autocrine IL-10 functions as a rheostat for M1 macrophage glycolytic commitment by tuning nitric oxide production. Redox Biol 2016; 10:12-23. [PMID: 27676159 PMCID: PMC5037266 DOI: 10.1016/j.redox.2016.09.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 01/07/2023] Open
Abstract
Inflammatory maturation of M1 macrophages by proinflammatory stimuli such as toll like receptor ligands results in profound metabolic reprogramming resulting in commitment to aerobic glycolysis as evidenced by repression of mitochondrial oxidative phosphorylation (OXPHOS) and enhanced glucose utilization. In contrast, "alternatively activated" macrophages adopt a metabolic program dominated by fatty acid-fueled OXPHOS. Despite the known importance of these developmental stages on the qualitative aspects of an inflammatory response, relatively little is know regarding the regulation of these metabolic adjustments. Here we provide evidence that the immunosuppressive cytokine IL-10 defines a metabolic regulatory loop. Our data show for the first time that lipopolysaccharide (LPS)-induced glycolytic flux controls IL-10-production via regulation of mammalian target of rapamycin (mTOR) and that autocrine IL-10 in turn regulates macrophage nitric oxide (NO) production. Genetic and pharmacological manipulation of IL-10 and nitric oxide (NO) establish that metabolically regulated autocrine IL-10 controls glycolytic commitment by limiting NO-mediated suppression of OXPHOS. Together these data support a model where autocine IL-10 production is controlled by glycolytic flux in turn regulating glycolytic commitment by preserving OXPHOS via suppression of NO. We propose that this IL-10-driven metabolic rheostat maintains metabolic equilibrium during M1 macrophage differentiation and that perturbation of this regulatory loop, either directly by exogenous cellular sources of IL-10 or indirectly via limitations in glucose availability, skews the cellular metabolic program altering the balance between inflammatory and immunosuppressive phenotypes.
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Affiliation(s)
- Walter A Baseler
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
| | - Luke C Davies
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States; Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Laura Quigley
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
| | - Lisa A Ridnour
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
| | - Jonathan M Weiss
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
| | - S Perwez Hussain
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, United States
| | - David A Wink
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States
| | - Daniel W McVicar
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, United States.
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231
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Luan HH, Medzhitov R. Food Fight: Role of Itaconate and Other Metabolites in Antimicrobial Defense. Cell Metab 2016; 24:379-387. [PMID: 27626199 PMCID: PMC5024735 DOI: 10.1016/j.cmet.2016.08.013] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/18/2016] [Accepted: 08/23/2016] [Indexed: 12/26/2022]
Abstract
Itaconate is a newly discovered mammalian metabolite bearing significant implications for our understanding of cellular immunometabolism and antimicrobial defense. Here, we explore recent findings regarding the role of itaconate in the innate immune response and highlight the emerging principle that metabolites can have distinct immunological functions independent of bioenergetics.
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Affiliation(s)
- Harding H Luan
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Ruslan Medzhitov
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA; Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520, USA.
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232
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Cordes T, Metallo CM. Tracing insights into human metabolism using chemical engineering approaches. Curr Opin Chem Eng 2016; 14:72-81. [PMID: 28480159 DOI: 10.1016/j.coche.2016.08.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Metabolism coordinates the conversion of available nutrients toward energy, biosynthetic intermediates, and signaling molecules to mediate virtually all biological functions. Dysregulation of metabolic pathways contributes to many diseases, so a detailed understanding of human metabolism has significant therapeutic implications. Over the last decade major technological advances in the areas of analytical chemistry, computational estimation of intracellular fluxes, and biological engineering have improved our ability to observe and engineer metabolic pathways. These approaches are reminiscent of the design, operation, and control of industrial chemical plants. Immune cells have emerged as an intriguing system in which metabolism influences diverse biological functions. Application of metabolic flux analysis and related approaches to macrophages and T cells offers great therapeutic opportunities to biochemical engineers.
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Affiliation(s)
- Thekla Cordes
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Christian M Metallo
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA 92093, USA
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233
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Fan TWM, Warmoes MO, Sun Q, Song H, Turchan-Cholewo J, Martin JT, Mahan A, Higashi RM, Lane AN. Distinctly perturbed metabolic networks underlie differential tumor tissue damages induced by immune modulator β-glucan in a two-case ex vivo non-small-cell lung cancer study. Cold Spring Harb Mol Case Stud 2016; 2:a000893. [PMID: 27551682 PMCID: PMC4990809 DOI: 10.1101/mcs.a000893] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Cancer and stromal cell metabolism is important for understanding tumor development, which highly depends on the tumor microenvironment (TME). Cell or animal models cannot recapitulate the human TME. We have developed an ex vivo paired cancerous (CA) and noncancerous (NC) human lung tissue approach to explore cancer and stromal cell metabolism in the native human TME. This approach enabled full control of experimental parameters and acquisition of individual patient's target tissue response to therapeutic agents while eliminating interferences from genetic and physiological variations. In this two-case study of non-small-cell lung cancer, we performed stable isotope-resolved metabolomic (SIRM) experiments on paired CA and NC lung tissues treated with a macrophage activator β-glucan and (13)C6-glucose, followed by ion chromatography-Fourier transform mass spectrometry (IC-FTMS) and nuclear magnetic resonance (NMR) analyses of (13)C-labeling patterns of metabolites. We demonstrated that CA lung tissue slices were metabolically more active than their NC counterparts, which recapitulated the metabolic reprogramming in CA lung tissues observed in vivo. We showed β-glucan-enhanced glycolysis, Krebs cycle, pentose phosphate pathway, antioxidant production, and itaconate buildup in patient UK021 with chronic obstructive pulmonary disease (COPD) and an abundance of tumor-associated macrophages (TAMs) but not in UK049 with no COPD and much less macrophage infiltration. This metabolic response of UK021 tissues was accompanied by reduced mitotic index, increased necrosis, and enhaced inducible nitric oxide synthase (iNOS) expression. We surmise that the reprogrammed networks could reflect β-glucan M1 polarization of human macrophages. This case study presents a unique opportunity for investigating metabolic responses of human macrophages to immune modulators in their native microenvironment on an individual patient basis.
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Affiliation(s)
- Teresa W-M Fan
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Marc O Warmoes
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Qiushi Sun
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Huan Song
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Jadwiga Turchan-Cholewo
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Jeremiah T Martin
- Department of Surgery and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Angela Mahan
- Department of Surgery and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Richard M Higashi
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
| | - Andrew N Lane
- Center for Environmental and Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, University of Kentucky, Lexington, Kentucky 40536, USA
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234
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Suppression of IRG-1 Reduces Inflammatory Cell Infiltration and Lung Injury in Respiratory Syncytial Virus Infection by Reducing Production of Reactive Oxygen Species. J Virol 2016; 90:7313-7322. [PMID: 27252532 DOI: 10.1128/jvi.00563-16] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 05/25/2016] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Respiratory syncytial virus (RSV) infection is a common cause of lower respiratory tract illness in infants and children. RSV is a negative-sense, single-strand RNA (ssRNA) virus that mainly infects airway epithelial cells. Accumulating evidence indicates that reactive oxygen species (ROS) production is a major factor for pulmonary inflammation and tissue damage of RSV disease. We investigated immune-responsive gene-1 (IRG1) expression during RSV infection, since IRG1 has been shown to mediate innate immune response to intracellular bacterial pathogens by modulating ROS and itaconic acid production. We found that RSV infection induced IRG1 expression in human A549 cells and in the lung tissues of RSV-infected mice. RSV infection or IRG1 overexpression promoted ROS production. Accordingly, knockdown of IRG1 induction blocked RSV-induced ROS production and proinflammatory cytokine gene expression. Finally, we showed that suppression of IRG1 induction reduced immune cell infiltration and prevented lung injury in RSV-infected mice. These results therefore link IRG1 induction to ROS production and immune lung injury after RSV infection. IMPORTANCE RSV infection is among the most common causes of childhood diseases. Recent studies identify ROS production as a factor contributing to RSV disease. We investigated the cause of ROS production and identified IRG1 as a critical factor linking ROS production to immune lung injury after RSV infection. We found that IRG1 was induced in A549 alveolar epithelial cells and in mouse lungs after RSV infection. Importantly, suppression of IRG1 induction reduced inflammatory cell infiltration and lung injury in mice. This study links IRG1 induction to oxidative damage and RSV disease. It also uncovers a potential therapeutic target in reducing RSV-caused lung injury.
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235
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Lampropoulou V, Sergushichev A, Bambouskova M, Nair S, Vincent EE, Loginicheva E, Cervantes-Barragan L, Ma X, Huang SCC, Griss T, Weinheimer CJ, Khader S, Randolph GJ, Pearce EJ, Jones RG, Diwan A, Diamond MS, Artyomov MN. Itaconate Links Inhibition of Succinate Dehydrogenase with Macrophage Metabolic Remodeling and Regulation of Inflammation. Cell Metab 2016; 24:158-66. [PMID: 27374498 PMCID: PMC5108454 DOI: 10.1016/j.cmet.2016.06.004] [Citation(s) in RCA: 871] [Impact Index Per Article: 108.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/08/2016] [Accepted: 06/03/2016] [Indexed: 12/19/2022]
Abstract
Remodeling of the tricarboxylic acid (TCA) cycle is a metabolic adaptation accompanying inflammatory macrophage activation. During this process, endogenous metabolites can adopt regulatory roles that govern specific aspects of inflammatory response, as recently shown for succinate, which regulates the pro-inflammatory IL-1β-HIF-1α axis. Itaconate is one of the most highly induced metabolites in activated macrophages, yet its functional significance remains unknown. Here, we show that itaconate modulates macrophage metabolism and effector functions by inhibiting succinate dehydrogenase-mediated oxidation of succinate. Through this action, itaconate exerts anti-inflammatory effects when administered in vitro and in vivo during macrophage activation and ischemia-reperfusion injury. Using newly generated Irg1(-/-) mice, which lack the ability to produce itaconate, we show that endogenous itaconate regulates succinate levels and function, mitochondrial respiration, and inflammatory cytokine production during macrophage activation. These studies highlight itaconate as a major physiological regulator of the global metabolic rewiring and effector functions of inflammatory macrophages.
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Affiliation(s)
- Vicky Lampropoulou
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Alexey Sergushichev
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Computer Technologies Department, ITMO University, Saint Petersburg 197101, Russia
| | - Monika Bambouskova
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Sharmila Nair
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Emma E Vincent
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada; and Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Ekaterina Loginicheva
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Luisa Cervantes-Barragan
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Xiucui Ma
- Center for Cardiovascular Research in Department of Medicine, and Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA; and John Cochran VA Medical Center, St. Louis, MO 63108, USA
| | - Stanley Ching-Cheng Huang
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Takla Griss
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada; and Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Carla J Weinheimer
- Division of Cardiology and Center for Cardiovascular Research, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA; and John Cochran VA Medical Center, St. Louis, MO 63108, USA
| | - Shabaana Khader
- Department of Molecular Microbiology, Washington University at St. Louis, St. Louis, MO 63110, USA
| | - Gwendalyn J Randolph
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Edward J Pearce
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Faculty of Biology, University of Freiburg, and Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Freiburg 79108, Germany
| | - Russell G Jones
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada; and Department of Physiology, McGill University, Montreal, QC H3G 1Y6, Canada
| | - Abhinav Diwan
- Center for Cardiovascular Research in Department of Medicine, and Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA; and John Cochran VA Medical Center, St. Louis, MO 63108, USA
| | - Michael S Diamond
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University at St. Louis, St. Louis, MO 63110, USA; Center for Human Immunology and Immunotherapy Programs, Washington University at St. Louis, St. Louis, MO 63110, USA
| | - Maxim N Artyomov
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; Center for Human Immunology and Immunotherapy Programs, Washington University at St. Louis, St. Louis, MO 63110, USA.
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236
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Hammerer F, Chang JH, Duncan D, Castañeda Ruiz A, Auclair K. Small Molecule Restores Itaconate Sensitivity inSalmonella enterica: A Potential New Approach to Treating Bacterial Infections. Chembiochem 2016; 17:1513-7. [DOI: 10.1002/cbic.201600078] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Fabien Hammerer
- Department of Chemistry; McGill University; Montreal Quebec H3A 0B8 Canada
| | - Justin H. Chang
- Department of Chemistry; McGill University; Montreal Quebec H3A 0B8 Canada
| | - Dustin Duncan
- Department of Chemistry; McGill University; Montreal Quebec H3A 0B8 Canada
| | | | - Karine Auclair
- Department of Chemistry; McGill University; Montreal Quebec H3A 0B8 Canada
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237
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Cordes T, Wallace M, Michelucci A, Divakaruni AS, Sapcariu SC, Sousa C, Koseki H, Cabrales P, Murphy AN, Hiller K, Metallo CM. Immunoresponsive Gene 1 and Itaconate Inhibit Succinate Dehydrogenase to Modulate Intracellular Succinate Levels. J Biol Chem 2016; 291:14274-14284. [PMID: 27189937 DOI: 10.1074/jbc.m115.685792] [Citation(s) in RCA: 326] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Indexed: 01/10/2023] Open
Abstract
Metabolic reprogramming is emerging as a hallmark of the innate immune response, and the dynamic control of metabolites such as succinate serves to facilitate the execution of inflammatory responses in macrophages and other immune cells. Immunoresponsive gene 1 (Irg1) expression is induced by inflammatory stimuli, and its enzyme product cis-aconitate decarboxylase catalyzes the production of itaconate from the tricarboxylic acid cycle. Here we identify an immunometabolic regulatory pathway that links Irg1 and itaconate production to the succinate accumulation that occurs in the context of innate immune responses. Itaconate levels and Irg1 expression correlate strongly with succinate during LPS exposure in macrophages and non-immune cells. We demonstrate that itaconate acts as an endogenous succinate dehydrogenase inhibitor to cause succinate accumulation. Loss of itaconate production in activated macrophages from Irg1(-/-) mice decreases the accumulation of succinate in response to LPS exposure. This metabolic network links the innate immune response and tricarboxylic acid metabolism to function of the electron transport chain.
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Affiliation(s)
- Thekla Cordes
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093
| | - Martina Wallace
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093
| | - Alessandro Michelucci
- NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, 1526 Luxembourg, Luxembourg,; Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 4362 Esch-Belval, Luxembourg
| | - Ajit S Divakaruni
- Department of Pharmacology, University of California, San Diego, La Jolla, California 92093
| | - Sean C Sapcariu
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 4362 Esch-Belval, Luxembourg
| | - Carole Sousa
- NORLUX Neuro-Oncology Laboratory, Department of Oncology, Luxembourg Institute of Health, 1526 Luxembourg, Luxembourg,; Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 4362 Esch-Belval, Luxembourg
| | - Haruhiko Koseki
- RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan
| | - Pedro Cabrales
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093
| | - Anne N Murphy
- Department of Pharmacology, University of California, San Diego, La Jolla, California 92093
| | - Karsten Hiller
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 4362 Esch-Belval, Luxembourg
| | - Christian M Metallo
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093; Institute of Engineering in Medicine, University of California, San Diego, La Jolla, California 92093,.
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238
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Chen M, Huang X, Zhong C, Li J, Lu X. Identification of an itaconic acid degrading pathway in itaconic acid producing Aspergillus terreus. Appl Microbiol Biotechnol 2016; 100:7541-8. [PMID: 27102125 DOI: 10.1007/s00253-016-7554-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/07/2016] [Accepted: 04/14/2016] [Indexed: 11/27/2022]
Abstract
Itaconic acid, one of the most promising and flexible bio-based chemicals, is mainly produced by Aspergillus terreus. Previous studies to improve itaconic acid production in A. terreus through metabolic engineering were mainly focused on its biosynthesis pathway, while the itaconic acid-degrading pathway has largely been ignored. In this study, we used transcriptomic, proteomic, bioinformatic, and in vitro enzymatic analyses to identify three key enzymes, itaconyl-CoA transferase (IctA), itaconyl-CoA hydratase (IchA), and citramalyl-CoA lyase (CclA), that are involved in the catabolic pathway of itaconic acid in A. terreus. In the itaconic acid catabolic pathway in A. terreus, itaconic acid is first converted by IctA into itaconyl-CoA with succinyl-CoA as the CoA donor, and then itaconyl-CoA is hydrated into citramalyl-CoA by IchA. Finally, citramalyl-CoA is cleaved into acetyl-CoA and pyruvate by CclA. Moreover, IctA can also catalyze the reaction between citramalyl-CoA and succinate to generate succinyl-CoA and citramalate. These results, for the first time, identify the three key enzymes, IctA, IchA, and CclA, involved in the itaconic acid degrading pathway in itaconic acid producing A. terreus. The results will facilitate the improvement of itaconic acid production by metabolically engineering the catabolic pathway of itaconic acid in A. terreus.
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Affiliation(s)
- Mei Chen
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Xuenian Huang
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chengwei Zhong
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianjun Li
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xuefeng Lu
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
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239
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Succinate, an intermediate in metabolism, signal transduction, ROS, hypoxia, and tumorigenesis. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2016; 1857:1086-1101. [PMID: 26971832 DOI: 10.1016/j.bbabio.2016.03.012] [Citation(s) in RCA: 318] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 03/06/2016] [Accepted: 03/07/2016] [Indexed: 12/31/2022]
Abstract
Succinate is an important metabolite at the cross-road of several metabolic pathways, also involved in the formation and elimination of reactive oxygen species. However, it is becoming increasingly apparent that its realm extends to epigenetics, tumorigenesis, signal transduction, endo- and paracrine modulation and inflammation. Here we review the pathways encompassing succinate as a metabolite or a signal and how these may interact in normal and pathological conditions.(1).
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240
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Loss of DJ-1 impairs antioxidant response by altered glutamine and serine metabolism. Neurobiol Dis 2016; 89:112-25. [PMID: 26836693 DOI: 10.1016/j.nbd.2016.01.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 01/16/2016] [Accepted: 01/20/2016] [Indexed: 12/24/2022] Open
Abstract
The oncogene DJ-1 has been originally identified as a suppressor of PTEN. Further on, loss-of-function mutations have been described as a causative factor in Parkinson's disease (PD). DJ-1 has an important function in cellular antioxidant responses, but its role in central metabolism of neurons is still elusive. We applied stable isotope assisted metabolic profiling to investigate the effect of a functional loss of DJ-1 and show that DJ-1 deficient neuronal cells exhibit decreased glutamine influx and reduced serine biosynthesis. By providing precursors for GSH synthesis, these two metabolic pathways are important contributors to cellular antioxidant response. Down-regulation of these pathways, as a result of loss of DJ-1 leads to an impaired antioxidant response. Furthermore, DJ-1 deficient mouse microglia showed a weak but constitutive pro-inflammatory activation. The combined effects of altered central metabolism and constitutive activation of glia cells raise the susceptibility of dopaminergic neurons towards degeneration in patients harboring mutated DJ-1. Our work reveals metabolic alterations leading to increased cellular instability and identifies potential new intervention points that can further be studied in the light of novel translational medicine approaches.
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241
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Meiser J, Krämer L, Sapcariu SC, Battello N, Ghelfi J, D'Herouel AF, Skupin A, Hiller K. Pro-inflammatory Macrophages Sustain Pyruvate Oxidation through Pyruvate Dehydrogenase for the Synthesis of Itaconate and to Enable Cytokine Expression. J Biol Chem 2015; 291:3932-46. [PMID: 26679997 PMCID: PMC4759172 DOI: 10.1074/jbc.m115.676817] [Citation(s) in RCA: 168] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Indexed: 01/10/2023] Open
Abstract
Upon stimulation with Th1 cytokines or bacterial lipopolysaccharides, resting macrophages shift their phenotype toward a pro-inflammatory state as part of the innate immune response. LPS-activated macrophages undergo profound metabolic changes to adapt to these new physiological requirements. One key step to mediate this metabolic adaptation is the stabilization of HIF1α, which leads to increased glycolysis and lactate release, as well as decreased oxygen consumption. HIF1 abundance can result in the induction of the gene encoding pyruvate dehydrogenase kinase 1 (PDK1), which inhibits pyruvate dehydrogenase (PDH) via phosphorylation. Therefore, it has been speculated that pyruvate oxidation through PDH is decreased in pro-inflammatory macrophages. However, to answer this open question, an in-depth analysis of this metabolic branching point was so far lacking. In this work, we applied stable isotope-assisted metabolomics techniques and demonstrate that pyruvate oxidation is maintained in mature pro-inflammatory macrophages. Glucose-derived pyruvate is oxidized via PDH to generate citrate in the mitochondria. Citrate is used for the synthesis of the antimicrobial metabolite itaconate and for lipogenesis. An increased demand for these metabolites decreases citrate oxidation through the tricarboxylic acid cycle, whereas increased glutamine uptake serves to replenish the TCA cycle. Furthermore, we found that the PDH flux is maintained by unchanged PDK1 abundance, despite the presence of HIF1. By pharmacological intervention, we demonstrate that the PDH flux is an important node for M(LPS) macrophage activation. Therefore, PDH represents a metabolic intervention point that might become a research target for translational medicine to treat chronic inflammatory diseases.
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Affiliation(s)
- Johannes Meiser
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Lisa Krämer
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Sean C Sapcariu
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Nadia Battello
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Jenny Ghelfi
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Aymeric Fouquier D'Herouel
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Alexander Skupin
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
| | - Karsten Hiller
- From the Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue de Swing, L-4367 Belvaux, Luxembourg
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242
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Kiran D, Podell BK, Chambers M, Basaraba RJ. Host-directed therapy targeting the Mycobacterium tuberculosis granuloma: a review. Semin Immunopathol 2015; 38:167-83. [PMID: 26510950 PMCID: PMC4779125 DOI: 10.1007/s00281-015-0537-x] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 10/13/2015] [Indexed: 12/16/2022]
Abstract
Infection by the intracellular bacterial pathogen Mycobacterium tuberculosis (Mtb) is a major cause of morbidity and mortality worldwide. Slow progress has been made in lessening the impact of tuberculosis (TB) on human health, especially in parts of the world where Mtb is endemic. Due to the complexity of TB disease, there is still an urgent need to improve diagnosis, prevention, and treatment strategies to control global spread of disease. Active research targeting avenues to prevent infection or transmission through vaccination, to diagnose asymptomatic carriers of Mtb, and to improve antimicrobial drug treatment responses is ongoing. However, this research is hampered by a relatively poor understanding of the pathogenesis of early infection and the factors that contribute to host susceptibility, protection, and the development of active disease. There is increasing interest in the development of adjunctive therapy that will aid the host in responding to Mtb infection appropriately thereby improving the effectiveness of current and future drug treatments. In this review, we summarize what is known about the host response to Mtb infection in humans and animal models and highlight potential therapeutic targets involved in TB granuloma formation and resolution. Strategies designed to shift the balance of TB granuloma formation toward protective rather than destructive processes are discussed based on our current knowledge. These therapeutic strategies are based on the assumption that granuloma formation, although thought to prevent the spread of the tubercle bacillus within and between individuals contributes to manifestations of active TB disease in human patients when left unchecked. This effect of granuloma formation favors the spread of infection and impairs antimicrobial drug treatment. By gaining a better understanding of the mechanisms by which Mtb infection contributes to irreversible tissue damage, down regulates protective immune responses, and delays tissue healing, new treatment strategies can be rationally designed. Granuloma-targeted therapy is advantageous because it allows for the repurpose of existing drugs used to treat other communicable and non-communicable diseases as adjunctive therapies combined with existing and future anti-TB drugs. Thus, the development of adjunctive, granuloma-targeted therapy, like other host-directed therapies, may benefit from the availability of approved drugs to aid in treatment and prevention of TB. In this review, we have attempted to summarize the results of published studies in the context of new innovative approaches to host-directed therapy that need to be more thoroughly explored in pre-clinical animal studies and in human clinical trials.
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Affiliation(s)
- Dilara Kiran
- Department of Microbiology, Immunology and Pathology, Metabolism of Infectious Diseases Laboratory and Mycobacteria Research Laboratories, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 200 West Lake Street, 1619 Campus Delivery, Fort Collins, CO, 80523-1619, USA
| | - Brendan K Podell
- Department of Microbiology, Immunology and Pathology, Metabolism of Infectious Diseases Laboratory and Mycobacteria Research Laboratories, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 200 West Lake Street, 1619 Campus Delivery, Fort Collins, CO, 80523-1619, USA
| | - Mark Chambers
- Department of Bacteriology, Animal and Plant Health Agency (APHA), Woodham Lane, New Haw, Addlestone, Surrey, KT15 3NB, UK.,School of Veterinary Medicine Faculty of Health and Medical Sciences, University of Surrey, Vet School Main Building, Daphne Jackson Road, Guildford, GU2 7AL, UK
| | - Randall J Basaraba
- Department of Microbiology, Immunology and Pathology, Metabolism of Infectious Diseases Laboratory and Mycobacteria Research Laboratories, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 200 West Lake Street, 1619 Campus Delivery, Fort Collins, CO, 80523-1619, USA.
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243
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Németh B, Doczi J, Csete D, Kacso G, Ravasz D, Adams D, Kiss G, Nagy AM, Horvath G, Tretter L, Mócsai A, Csépányi-Kömi R, Iordanov I, Adam-Vizi V, Chinopoulos C. Abolition of mitochondrial substrate-level phosphorylation by itaconic acid produced by LPS-induced Irg1 expression in cells of murine macrophage lineage. FASEB J 2015; 30:286-300. [PMID: 26358042 DOI: 10.1096/fj.15-279398] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 08/31/2015] [Indexed: 01/28/2023]
Abstract
Itaconate is a nonamino organic acid exhibiting antimicrobial effects. It has been recently identified in cells of macrophage lineage as a product of an enzyme encoded by immunoresponsive gene 1 (Irg1), acting on the citric acid cycle intermediate cis-aconitate. In mitochondria, itaconate can be converted by succinate-coenzyme A (CoA) ligase to itaconyl-CoA at the expense of ATP (or GTP), and is also a weak competitive inhibitor of complex II. Here, we investigated specific bioenergetic effects of increased itaconate production mediated by LPS-induced stimulation of Irg1 in murine bone marrow-derived macrophages (BMDM) and RAW-264.7 cells. In rotenone-treated macrophage cells, stimulation by LPS led to impairment in substrate-level phosphorylation (SLP) of in situ mitochondria, deduced by a reversal in the directionality of the adenine nucleotide translocase operation. In RAW-264.7 cells, the LPS-induced impairment in SLP was reversed by short-interfering RNA(siRNA)-but not scrambled siRNA-treatment directed against Irg1. LPS dose-dependently inhibited oxygen consumption rates (61-91%) and elevated glycolysis rates (>21%) in BMDM but not RAW-264.7 cells, studied under various metabolic conditions. In isolated mouse liver mitochondria treated with rotenone, itaconate dose-dependently (0.5-2 mM) reversed the operation of adenine nucleotide translocase, implying impairment in SLP, an effect that was partially mimicked by malonate. However, malonate yielded greater ADP-induced depolarizations (3-19%) than itaconate. We postulate that itaconate abolishes SLP due to 1) a "CoA trap" in the form of itaconyl-CoA that negatively affects the upstream supply of succinyl-CoA from the α-ketoglutarate dehydrogenase complex; 2) depletion of ATP (or GTP), which are required for the thioesterification by succinate-CoA ligase; and 3) inhibition of complex II leading to a buildup of succinate which shifts succinate-CoA ligase equilibrium toward ATP (or GTP) utilization. Our results support the notion that Irg1-expressing cells of macrophage lineage lose the capacity of mitochondrial SLP for producing itaconate during mounting of an immune defense.
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Affiliation(s)
- Beáta Németh
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Judit Doczi
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Dániel Csete
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Gergely Kacso
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Dora Ravasz
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Daniel Adams
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Gergely Kiss
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Adam M Nagy
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Gergo Horvath
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Laszlo Tretter
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Attila Mócsai
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Roland Csépányi-Kömi
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Iordan Iordanov
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Vera Adam-Vizi
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
| | - Christos Chinopoulos
- *Department of Medical Biochemistry and Department of Physiology, Semmelweis University, Budapest, Hungary; and Lendület Neurobiochemistry Research Group, Lendület Inflammation Physiology Research Group, Laboratory for Neurobiochemistry, and Lendület Ion Channel Research Group, Hungarian Academy of Sciences, Budapest, Hungary
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244
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El Kasmi KC, Stenmark KR. Contribution of metabolic reprogramming to macrophage plasticity and function. Semin Immunol 2015; 27:267-75. [PMID: 26454572 PMCID: PMC4677817 DOI: 10.1016/j.smim.2015.09.001] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 09/18/2015] [Accepted: 09/21/2015] [Indexed: 02/07/2023]
Abstract
Macrophages display a spectrum of functional activation phenotypes depending on the composition of the microenvironment they reside in, including type of tissue/organ and character of injurious challenge they are exposed to. Our understanding of how macrophage plasticity is regulated by the local microenvironment is still limited. Here we review and discuss the recent literature regarding the contribution of cellular metabolic pathways to the ability of the macrophage to sense the microenvironment and to alter its function. We propose that distinct alterations in the microenvironment induce a spectrum of inducible and reversible metabolic programs that might form the basis of the inducible and reversible spectrum of functional macrophage activation/polarization phenotypes. We highlight that metabolic pathways in the bidirectional communication between macrophages and stromals cells are an important component of chronic inflammatory conditions. Recent work demonstrates that inflammatory macrophage activation is tightly associated with metabolic reprogramming to aerobic glycolysis, an altered TCA cycle, and reduced mitochondrial respiration. We review cytosolic and mitochondrial mechanisms that promote initiation and maintenance of macrophage activation as they relate to increased aerobic glycolysis and highlight potential pathways through which anti-inflammatory IL-10 could promote macrophage deactivation. Finally, we propose that in addition to their role in energy generation and regulation of apoptosis, mitochondria reprogram their metabolism to also participate in regulating macrophage activation and plasticity.
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Affiliation(s)
- Karim C El Kasmi
- University of Colorado Denver, School of Medicine, Department of Pediatrics, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Aurora, CO, USA.
| | - Kurt R Stenmark
- University of Colorado Denver, School of Medicine, Section of Pediatric Critical Care and Cardiovascular Pulmonary Research, Department of Medicine, Aurora, CO, USA
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245
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Mesaconase Activity of Class I Fumarase Contributes to Mesaconate Utilization by Burkholderia xenovorans. Appl Environ Microbiol 2015; 81:5632-8. [PMID: 26070669 DOI: 10.1128/aem.00822-15] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 06/02/2015] [Indexed: 11/20/2022] Open
Abstract
Pseudomonas aeruginosa, Yersinia pestis, and many other bacteria are able to utilize the C5-dicarboxylic acid itaconate (methylenesuccinate). Itaconate degradation starts with its activation to itaconyl coenzyme A (itaconyl-CoA), which is further hydrated to (S)-citramalyl-CoA, and citramalyl-CoA is finally cleaved into acetyl-CoA and pyruvate. The xenobiotic-degrading betaproteobacterium Burkholderia xenovorans possesses a P. aeruginosa-like itaconate degradation gene cluster and is able to grow on itaconate and its isomer mesaconate (methylfumarate). Although itaconate degradation proceeds in B. xenovorans in the same way as in P. aeruginosa, the pathway of mesaconate utilization is not known. Here, we show that mesaconate is metabolized through its hydration to (S)-citramalate. The latter compound is then metabolized to acetyl-CoA and pyruvate with the participation of two enzymes of the itaconate degradation pathway, a promiscuous itaconate-CoA transferase able to activate (S)-citramalate in addition to itaconate and (S)-citramalyl-CoA lyase. The first reaction of the pathway, the mesaconate hydratase (mesaconase) reaction, is catalyzed by a class I fumarase. As this enzyme (Bxe_A3136) has similar efficiencies (kcat/Km) for both fumarate and mesaconate hydration, we conclude that B. xenovorans class I fumarase is in fact a promiscuous fumarase/mesaconase. This promiscuity is physiologically relevant, as it allows the growth of this bacterium on mesaconate as a sole carbon and energy source.
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246
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Cordes T, Michelucci A, Hiller K. Itaconic Acid: The Surprising Role of an Industrial Compound as a Mammalian Antimicrobial Metabolite. Annu Rev Nutr 2015; 35:451-73. [PMID: 25974697 DOI: 10.1146/annurev-nutr-071714-034243] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Itaconic acid is well known as a precursor for polymer synthesis and has been involved in industrial processes for decades. In a recent surprising discovery, itaconic acid was found to play a role as an immune-supportive metabolite in mammalian immune cells, where it is synthesized as an antimicrobial compound from the citric acid cycle intermediate cis-aconitic acid. Although the immune-responsive gene 1 protein (IRG1) has been associated to immune response without a mechanistic function, the critical link to itaconic acid production through an enzymatic function of this protein was only recently revealed. In this review, we highlight the history of itaconic acid as an industrial and antimicrobial compound, starting with its biotechnological synthesis and ending with its antimicrobial function in mammalian immune cells.
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Affiliation(s)
- Thekla Cordes
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, L-4362 Esch-Belval, Luxembourg; ,
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247
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Tannahill GM, Iraci N, Gaude E, Frezza C, Pluchino S. Metabolic reprograming of mononuclear phagocytes in progressive multiple sclerosis. Front Immunol 2015; 6:106. [PMID: 25814990 PMCID: PMC4356156 DOI: 10.3389/fimmu.2015.00106] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 02/24/2015] [Indexed: 12/31/2022] Open
Abstract
UNLABELLED Multiple sclerosis (MS) is an inflammatory and demyelinating disease of the central nervous system (CNS). Accumulation of brain damage in progressive MS is partly the result of mononuclear phagocytes (MPs) attacking myelin sheaths in the CNS. Although there is no cure yet for MS, significant advances have been made in the development of disease modifying agents. Unfortunately, most of these drugs fail to reverse established neurological deficits and can have adverse effects. Recent evidence suggests that MPs polarization is accompanied by profound metabolic changes, whereby pro-inflammatory MPs (M1) switch toward glycolysis, whereas anti-inflammatory MPs (M2) become more oxidative. It is therefore possible that reprograming MPs metabolism could affect their function and repress immune cell activation. This mini review describes the metabolic changes underpinning macrophages polarization and anticipates how metabolic re-education of MPs could be used for the treatment of MS. KEY POINTS Inflammation in progressive MS is mediated primarily by MPs.Cell metabolism regulates the function of MPs.DMAs can re-educate the metabolism of MPs to promote healing.
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Affiliation(s)
- Gillian Margaret Tannahill
- Department of Clinical Neurosciences, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council (MRC) Stem Cell Institute, Cambridge, UK
| | - Nunzio Iraci
- Department of Clinical Neurosciences, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council (MRC) Stem Cell Institute, Cambridge, UK
| | - Edoardo Gaude
- Wellcome Trust-Medical Research Council (MRC) Stem Cell Institute, Cambridge, UK
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, UK
| | - Christian Frezza
- Wellcome Trust-Medical Research Council (MRC) Stem Cell Institute, Cambridge, UK
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, UK
| | - Stefano Pluchino
- Department of Clinical Neurosciences, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council (MRC) Stem Cell Institute, Cambridge, UK
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248
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Abstract
Metabolism underpins the physiology and pathogenesis of Mycobacterium tuberculosis. However, although experimental mycobacteriology has provided key insights into the metabolic pathways that are essential for survival and pathogenesis, determining the metabolic status of bacilli during different stages of infection and in different cellular compartments remains challenging. Recent advances-in particular, the development of systems biology tools such as metabolomics-have enabled key insights into the biochemical state of M. tuberculosis in experimental models of infection. In addition, their use to elucidate mechanisms of action of new and existing antituberculosis drugs is critical for the development of improved interventions to counter tuberculosis. This review provides a broad summary of mycobacterial metabolism, highlighting the adaptation of M. tuberculosis as specialist human pathogen, and discusses recent insights into the strategies used by the host and infecting bacillus to influence the outcomes of the host-pathogen interaction through modulation of metabolic functions.
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Affiliation(s)
- Digby F Warner
- Medical Research Council/National Health Laboratory Services/University of Cape Town Molecular Mycobacteriology Research Unit and Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical TB Research, Institute of Infectious Disease and Molecular Medicine and Division of Medical Microbiology, University of Cape Town, Rondebosch 7700, South Africa
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249
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Zhu X, Lei H, Wu J, Li JV, Tang H, Wang Y. Systemic responses of BALB/c mice to Salmonella typhimurium infection. J Proteome Res 2014; 13:4436-45. [PMID: 25209111 DOI: 10.1021/pr500770x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Salmonella typhimurium is a bacterial pathogen that poses a great threat to humans and animals. In order to discover hosts' responses to S. typhimurium infection, we collected and analyzed biofluids and organ tissues from mice which had ingested S. typhimurium. We employed (1)H NMR spectroscopy coupled with multivariate data analysis and immunological techniques. The results indicate that infection leads to a severe impact on mice spleen and ileum, which are characterized by splenomegaly and edematous villi, respectively. We found that increased levels of itaconic acid were correlated with the presence of splenomegaly during infection and may play an important role in Salmonella-containing vacuole acidification. In addition, metabonomic analyses of urine displayed the development of salmonellosis in mice, which is characterized by dynamic changes in energy metabolism. Furthermore, we found that the presence of S. typhimurium activated an anti-oxidative response in infected mice. We also observed changes in the gut microbial co-metabolites (hippurate, TMAO, TMA, methylamine). This investigation sheds much needed light on the host-pathogen interactions of S. typhimurium, providing further information to deepen our understanding of the long co-evolution process between hosts and infective bacteria.
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Affiliation(s)
- Xiaoyang Zhu
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Centre for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences , Wuhan 430071, P. R. China
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Affiliation(s)
- Stéphane Ménage
- Chemistry and Biology of Metals Laboratory, UMR5249, CNRS; Université Grenoble Alpes, Grenoble, France; and Commissariat à l'énergie atomique et aux énergies alternatives, l'Institut de recherches en technologies et sciences pour le vivant (iRTSV), Grenoble, France
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- Bacterial Pathogenicity and Cellular Responses, ERL5261, CNRS; Biologie du cancer et de l'infection (UMR-S1036), INSERM, Grenoble, France; Université Grenoble Alpes, Grenoble, France; and CEA, iRTSV, Grenoble, France
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