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Niba ETE, Awano H, Nishimura N, Koide H, Matsuo M, Shinohara M. Differential metabolic secretion between muscular dystrophy mouse-derived spindle cell sarcomas and rhabdomyosarcomas drives tumor type development. Am J Physiol Cell Physiol 2024; 327:C34-C47. [PMID: 38646787 DOI: 10.1152/ajpcell.00523.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/23/2024]
Abstract
The dystrophin gene (Dmd) is recognized for its significance in Duchenne muscular dystrophy (DMD), a lethal and progressive skeletal muscle disease. Some patients with DMD and model mice with muscular dystrophy (mdx) spontaneously develop various types of tumors, among which rhabdomyosarcoma (RMS) is the most prominent. By contrast, spindle cell sarcoma (SCS) has rarely been reported in patients or mdx mice. In this study, we aimed to use metabolomics to better understand the rarity of SCS development in mdx mice. Gas chromatography-mass spectrometry was used to compare the metabolic profiles of spontaneously developed SCS and RMS tumors from mdx mice, and metabolite supplementation assays and silencing experiments were used to assess the effects of metabolic differences in SCS tumor-derived cells. The levels of 75 metabolites exhibited differences between RMS and SCS, 25 of which were significantly altered. Further characterization revealed downregulation of nonessential amino acids, including alanine, in SCS tumors. Alanine supplementation enhanced the growth, epithelial mesenchymal transition, and invasion of SCS cells. Reduction of intracellular alanine via knockdown of the alanine transporter Slc1a5 reduced the growth of SCS cells. Lower metabolite secretion and reduced proliferation of SCS tumors may explain the lower detection rate of SCS in mdx mice. Targeting of alanine depletion pathways may have potential as a novel treatment strategy.NEW & NOTEWORTHY To the best of our knowledge, SCS has rarely been identified in patients with DMD or mdx mice. We observed that RMS and SCS tumors that spontaneously developed from mdx mice with the same Dmd genetic background exhibited differences in metabolic secretion. We proposed that, in addition to dystrophin deficiency, the levels of secreted metabolites may play a role in the determination of tumor-type development in a Dmd-deficient background.
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Affiliation(s)
- Emma Tabe Eko Niba
- Laboratory of Molecular and Biochemical Research, Biomedical Research Core Facilities, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Division of Molecular Epidemiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroyuki Awano
- Organization for Research Initiative and Promotion, Research Initiative Center, Tottori University, Yonago, Japan
| | - Noriyuki Nishimura
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroshi Koide
- Laboratory of Molecular and Biochemical Research, Biomedical Research Core Facilities, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Masafumi Matsuo
- Graduate School of Science, Technology and Innovation , Kobe University, Kobe, Japan
| | - Masakazu Shinohara
- Division of Molecular Epidemiology, Kobe University Graduate School of Medicine, Kobe, Japan
- The Integrated Center for Mass Spectrometry, Kobe University Graduate School of Medicine, Kobe, Japan
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2
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Dwivedi S, Glock C, Germerodt S, Stark H, Schuster S. Game-theoretical description of the go-or-grow dichotomy in tumor development for various settings and parameter constellations. Sci Rep 2023; 13:16758. [PMID: 37798314 PMCID: PMC10555990 DOI: 10.1038/s41598-023-43199-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/21/2023] [Indexed: 10/07/2023] Open
Abstract
A medically important feature of several types of tumors is their ability to "decide" between staying at a primary site in the body or leaving it and forming metastases. The present theoretical study aims to provide a better understanding of the ultimate reasons for this so-called "go-or-grow" dichotomy. To that end, we use game theory, which has proven to be useful in analyzing the competition between tumors and healthy tissues or among different tumor cells. We begin by determining the game types in the Basanta-Hatzikirou-Deutsch model, depending on the parameter values. Thereafter, we suggest and analyze five modified variants of the model. For example, in the basic model, the deadlock game, Prisoner's Dilemma, and hawk-dove game can occur. The modified versions lead to several additional game types, such as battle of the sexes, route-choice, and stag-hunt games. For some game types, all cells are predicted to stay on their original site ("grow phenotype"), while for other types, only a certain fraction stay and the other cells migrate away ("go phenotype"). If the nutrient supply at a distant site is high, all the cells are predicted to go. We discuss our predictions in terms of the pros and cons of caloric restriction and limitations of the supply of vitamins or methionine. Our results may help devise treatments to prevent metastasis.
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Affiliation(s)
- Shalu Dwivedi
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University, Ernst-Abbe-Platz 2, 07743, Jena, Germany
| | - Christina Glock
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University, Ernst-Abbe-Platz 2, 07743, Jena, Germany
| | - Sebastian Germerodt
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University, Ernst-Abbe-Platz 2, 07743, Jena, Germany
| | - Heiko Stark
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University, Ernst-Abbe-Platz 2, 07743, Jena, Germany
- Institute of Zoology and Evolutionary Research, University of Jena, Erbertstr. 1, 07743, Jena, Germany
| | - Stefan Schuster
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University, Ernst-Abbe-Platz 2, 07743, Jena, Germany.
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3
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AlMalki RH, Jaber MA, Al-Ansari MM, Sumaily KM, Al-Alwan M, Sabi EM, Malkawi AK, Abdel Rahman AM. Metabolic Alteration of MCF-7 Cells upon Indirect Exposure to E. coli Secretome: A Model of Studying the Microbiota Effect on Human Breast Tissue. Metabolites 2023; 13:938. [PMID: 37623881 PMCID: PMC10456566 DOI: 10.3390/metabo13080938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/26/2023] Open
Abstract
According to studies, the microbiome may contribute to the emergence and spread of breast cancer. E. coli is one of the Enterobacteriaceae family recently found to be present as part of the breast tissue microbiota. In this study, we focused on the effect of E. coli secretome free of cells on MCF-7 metabolism. Liquid chromatography-mass spectrometry (LC-MS) metabolomics was used to study the E. coli secretome and its role in MCF-7 intra- and extracellular metabolites. A comparison was made between secretome-exposed cells and unexposed controls. Our analysis revealed significant alterations in 31 intracellular and 55 extracellular metabolites following secretome exposure. Several metabolic pathways, including lactate, aminoacyl-tRNA biosynthesis, purine metabolism, and energy metabolism, were found to be dysregulated upon E. coli secretome exposure. E. coli can alter the breast cancer cells' metabolism through its secretome which disrupts key metabolic pathways of MCF-7 cells. These microbial metabolites from the secretome hold promise as biomarkers of drug resistance or innovative approaches for cancer treatment, either as standalone therapies or in combination with other medicines.
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Affiliation(s)
- Reem H. AlMalki
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Malak A. Jaber
- Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Amman 11196, Jordan;
| | - Mysoon M. Al-Ansari
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Khalid M. Sumaily
- Clinical Biochemistry Unit, Pathology Department, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (K.M.S.); (E.M.S.)
| | - Monther Al-Alwan
- Cell Therapy and Immunobiology Department, King Faisal Specialist Hospital and Research Centre (KFSHRC), Riyadh 11211, Saudi Arabia;
| | - Essa M. Sabi
- Clinical Biochemistry Unit, Pathology Department, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; (K.M.S.); (E.M.S.)
| | - Abeer K. Malkawi
- Department of Chemistry and Biochemistry, Université Du Québec à Montréal, Montréal, QC H3C 3P8, Canada;
| | - Anas M. Abdel Rahman
- Metabolomics Section, Department of Clinical Genomics, Center for Genomics Medicine, King Faisal Specialist Hospital and Research Centre (KFSHRC), Riyadh 11211, Saudi Arabia
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4
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Kerkaert JD, Le Mauff F, Wucher BR, Beattie SR, Vesely EM, Sheppard DC, Nadell CD, Cramer RA. An Alanine Aminotransferase Is Required for Biofilm-Specific Resistance of Aspergillus fumigatus to Echinocandin Treatment. mBio 2022; 13:e0293321. [PMID: 35254131 PMCID: PMC9040767 DOI: 10.1128/mbio.02933-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/08/2022] [Indexed: 12/21/2022] Open
Abstract
Alanine metabolism has been suggested as an adaptation strategy to oxygen limitation in organisms ranging from plants to mammals. Within the pulmonary infection microenvironment, Aspergillus fumigatus forms biofilms with steep oxygen gradients defined by regions of oxygen limitation. An alanine aminotransferase, AlaA, was observed to function in alanine catabolism and is required for several aspects of A. fumigatus biofilm physiology. Loss of alaA, or its catalytic activity, results in decreased adherence of biofilms through a defect in the maturation of the extracellular matrix polysaccharide galactosaminogalactan (GAG). Additionally, exposure of cell wall polysaccharides is also impacted by loss of alaA, and loss of AlaA catalytic activity confers increased biofilm susceptibility to echinocandin treatment, which is correlated with enhanced fungicidal activity. The increase in echinocandin susceptibility is specific to biofilms, and chemical inhibition of alaA by the alanine aminotransferase inhibitor β-chloro-l-alanine is sufficient to sensitize A. fumigatus biofilms to echinocandin treatment. Finally, loss of alaA increases susceptibility of A. fumigatus to in vivo echinocandin treatment in a murine model of invasive pulmonary aspergillosis. Our results provide insight into the interplay of metabolism, biofilm formation, and antifungal drug resistance in A. fumigatus and describe a mechanism of increasing susceptibility of A. fumigatus biofilms to the echinocandin class of antifungal drugs. IMPORTANCE Aspergillus fumigatus is a ubiquitous filamentous fungus that causes an array of diseases depending on the immune status of an individual, collectively termed aspergillosis. Antifungal therapy for invasive pulmonary aspergillosis (IPA) or chronic pulmonary aspergillosis (CPA) is limited and too often ineffective. This is in part due to A. fumigatus biofilm formation within the infection environment and the resulting emergent properties, particularly increased antifungal resistance. Thus, insights into biofilm formation and mechanisms driving increased antifungal drug resistance are critical for improving existing therapeutic strategies and development of novel antifungals. In this work, we describe an unexpected observation where alanine metabolism, via the alanine aminotransferase AlaA, is required for several aspects of A. fumigatus biofilm physiology, including resistance of A. fumigatus biofilms to the echinocandin class of antifungal drugs. Importantly, we observed that chemical inhibition of alanine aminotransferases is sufficient to increase echinocandin susceptibility and that loss of alaA increases susceptibility to echinocandin treatment in a murine model of IPA. AlaA is the first gene discovered in A. fumigatus that confers resistance to an antifungal drug specifically in a biofilm context.
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Affiliation(s)
- Joshua D. Kerkaert
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - François Le Mauff
- Department of Microbiology and Immunology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Infectious Disease and Immunity in Global Health, Research Institute of McGill University Health Center, Montreal, Quebec, Canada
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
| | - Benjamin R. Wucher
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, USA
| | - Sarah R. Beattie
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Elisa M. Vesely
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Donald C. Sheppard
- Department of Microbiology and Immunology, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Infectious Disease and Immunity in Global Health, Research Institute of McGill University Health Center, Montreal, Quebec, Canada
- McGill Interdisciplinary Initiative in Infection and Immunity, Montreal, Quebec, Canada
| | - Carey D. Nadell
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, USA
| | - Robert A. Cramer
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
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5
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Li T, Copeland C, Le A. Glutamine Metabolism in Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1311:17-38. [PMID: 34014532 DOI: 10.1007/978-3-030-65768-0_2] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Metabolism is a fundamental process for all cellular functions. For decades, there has been growing evidence of a relationship between metabolism and malignant cell proliferation. Unlike normal differentiated cells, cancer cells have reprogrammed metabolism in order to fulfill their energy requirements. These cells display crucial modifications in many metabolic pathways, such as glycolysis and glutaminolysis, which include the tricarboxylic acid (TCA) cycle, the electron transport chain (ETC), and the pentose phosphate pathway (PPP) [1]. Since the discovery of the Warburg effect, it has been shown that the metabolism of cancer cells plays a critical role in cancer survival and growth. More recent research suggests that the involvement of glutamine in cancer metabolism is more significant than previously thought. Glutamine, a nonessential amino acid with both amine and amide functional groups, is the most abundant amino acid circulating in the bloodstream [2]. This chapter discusses the characteristic features of glutamine metabolism in cancers and the therapeutic options to target glutamine metabolism for cancer treatment.
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Affiliation(s)
- Ting Li
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Anne Le
- Department of Pathology and Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD, USA.
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6
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Schuster S, Ewald J, Kaleta C. Modeling the energy metabolism in immune cells. Curr Opin Biotechnol 2021; 68:282-291. [PMID: 33770632 DOI: 10.1016/j.copbio.2021.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/16/2021] [Accepted: 03/01/2021] [Indexed: 02/08/2023]
Abstract
In this review, we summarize and briefly discuss various approaches to modeling the metabolism in human immune cells, with a focus on energy metabolism. These approaches include metabolic reconstruction, elementary modes, and flux balance analysis, which are often subsumed under constraint-based modeling. Further approaches are evolutionary game theory and kinetic modeling. Many immune cells such as macrophages show the Warburg effect, meaning that glycolysis is upregulated upon activation. We outline a minimal model for explaining that effect using optimization. The effect of a confrontation with pathogen cells on immunometabolism is highlighted. Models describing the differences between M1 and M2 macrophages, ROS production in neutrophils, and tryptophan metabolism are discussed. Obstacles and future prospects are outlined.
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Affiliation(s)
- Stefan Schuster
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University Jena, Ernst-Abbe-Pl. 2, 07743 Jena, Germany.
| | - Jan Ewald
- Department of Bioinformatics, Matthias Schleiden Institute, Friedrich Schiller University Jena, Ernst-Abbe-Pl. 2, 07743 Jena, Germany
| | - Christoph Kaleta
- Medical Systems Biology Group, Institute of Experimental Medicine, Christian-Albrechts-University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
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7
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Just PA, Charawi S, Denis RGP, Savall M, Traore M, Foretz M, Bastu S, Magassa S, Senni N, Sohier P, Wursmer M, Vasseur-Cognet M, Schmitt A, Le Gall M, Leduc M, Guillonneau F, De Bandt JP, Mayeux P, Romagnolo B, Luquet S, Bossard P, Perret C. Lkb1 suppresses amino acid-driven gluconeogenesis in the liver. Nat Commun 2020; 11:6127. [PMID: 33257663 PMCID: PMC7705018 DOI: 10.1038/s41467-020-19490-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 10/12/2020] [Indexed: 12/13/2022] Open
Abstract
Excessive glucose production by the liver is a key factor in the hyperglycemia observed in type 2 diabetes mellitus (T2DM). Here, we highlight a novel role of liver kinase B1 (Lkb1) in this regulation. We show that mice with a hepatocyte-specific deletion of Lkb1 have higher levels of hepatic amino acid catabolism, driving gluconeogenesis. This effect is observed during both fasting and the postprandial period, identifying Lkb1 as a critical suppressor of postprandial hepatic gluconeogenesis. Hepatic Lkb1 deletion is associated with major changes in whole-body metabolism, leading to a lower lean body mass and, in the longer term, sarcopenia and cachexia, as a consequence of the diversion of amino acids to liver metabolism at the expense of muscle. Using genetic, proteomic and pharmacological approaches, we identify the aminotransferases and specifically Agxt as effectors of the suppressor function of Lkb1 in amino acid-driven gluconeogenesis. Excessive glucose production by the liver contributes to poor blood glucose control in type 2 diabetes. Here the authors report that the liver kinase B1 (Lkb1) suppresses amino acid driven postprandial glucose production in the liver through the aminotransferase Agxt.
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Affiliation(s)
- Pierre-Alexandre Just
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.,APHP, Centre-Université de Paris, Paris, France
| | - Sara Charawi
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Raphaël G P Denis
- Unité de Biologie Fonctionnelle et Adaptative, Centre National la Recherche Scientifique, Unité Mixte de Recherche 8251, Université Paris Diderot, Sorbonne Paris Cité, 75205, Paris, France
| | - Mathilde Savall
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Massiré Traore
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Marc Foretz
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Sultan Bastu
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | | | - Nadia Senni
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Pierre Sohier
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Maud Wursmer
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Mireille Vasseur-Cognet
- UMR IRD 242, UPEC, CNRS 7618, UPMC 113, INRA 1392, Sorbonne Universités Paris and Institut d'Ecologie et des Sciences de l'Environnement de Paris, Bondy, France
| | - Alain Schmitt
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.,Electron Miscroscopy Facility, Institut Cochin, F75014, Paris, France
| | - Morgane Le Gall
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.,3P5 proteom'IC Facility, Université de Paris, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Marjorie Leduc
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.,3P5 proteom'IC Facility, Université de Paris, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - François Guillonneau
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.,3P5 proteom'IC Facility, Université de Paris, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | | | - Patrick Mayeux
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.,3P5 proteom'IC Facility, Université de Paris, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Béatrice Romagnolo
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Serge Luquet
- Unité de Biologie Fonctionnelle et Adaptative, Centre National la Recherche Scientifique, Unité Mixte de Recherche 8251, Université Paris Diderot, Sorbonne Paris Cité, 75205, Paris, France
| | - Pascale Bossard
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France
| | - Christine Perret
- Université de Paris, Institut Cochin, INSERM, CNRS, F75014, Paris, France.
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8
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Oncology Therapeutics Targeting the Metabolism of Amino Acids. Cells 2020; 9:cells9081904. [PMID: 32824193 PMCID: PMC7463463 DOI: 10.3390/cells9081904] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 12/19/2022] Open
Abstract
Amino acid metabolism promotes cancer cell proliferation and survival by supporting building block synthesis, producing reducing agents to mitigate oxidative stress, and generating immunosuppressive metabolites for immune evasion. Malignant cells rewire amino acid metabolism to maximize their access to nutrients. Amino acid transporter expression is upregulated to acquire amino acids from the extracellular environment. Under nutrient depleted conditions, macropinocytosis can be activated where proteins from the extracellular environment are engulfed and degraded into the constituent amino acids. The demand for non-essential amino acids (NEAAs) can be met through de novo synthesis pathways. Cancer cells can alter various signaling pathways to boost amino acid usage for the generation of nucleotides, reactive oxygen species (ROS) scavenging molecules, and oncometabolites. The importance of amino acid metabolism in cancer proliferation makes it a potential target for therapeutic intervention, including via small molecules and antibodies. In this review, we will delineate the targets related to amino acid metabolism and promising therapeutic approaches.
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9
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Metabolic reprogramming and disease progression in cancer patients. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165721. [PMID: 32057942 DOI: 10.1016/j.bbadis.2020.165721] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/22/2020] [Accepted: 02/09/2020] [Indexed: 12/19/2022]
Abstract
Genomics has contributed to the treatment of a fraction of cancer patients. However, there is a need to profile the proteins that define the phenotype of cancer and its pathogenesis. The reprogramming of metabolism is a major trait of the cancer phenotype with great potential for prognosis and targeted therapy. This review overviews the major changes reported in the steady-state levels of proteins of metabolism in primary carcinomas, paying attention to those enzymes that correlate with patients' survival. The upregulation of enzymes of glycolysis, pentose phosphate pathway, lipogenesis, glutaminolysis and the antioxidant defense is concurrent with the downregulation of mitochondrial proteins involved in oxidative phosphorylation, emphasizing the potential of mitochondrial metabolism as a promising therapeutic target in cancer. We stress that high-throughput quantitative expression profiling of differentially expressed proteins in large cohorts of carcinomas paired with normal tissues will accelerate translation of metabolism to a successful personalized medicine in cancer.
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10
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Lieu EL, Nguyen T, Rhyne S, Kim J. Amino acids in cancer. Exp Mol Med 2020; 52:15-30. [PMID: 31980738 PMCID: PMC7000687 DOI: 10.1038/s12276-020-0375-3] [Citation(s) in RCA: 377] [Impact Index Per Article: 94.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/24/2019] [Accepted: 12/02/2019] [Indexed: 01/22/2023] Open
Abstract
Over 90 years ago, Otto Warburg's seminal discovery of aerobic glycolysis established metabolic reprogramming as one of the first distinguishing characteristics of cancer1. The field of cancer metabolism subsequently revealed additional metabolic alterations in cancer by focusing on central carbon metabolism, including the citric acid cycle and pentose phosphate pathway. Recent reports have, however, uncovered substantial non-carbon metabolism contributions to cancer cell viability and growth. Amino acids, nutrients vital to the survival of all cell types, experience reprogrammed metabolism in cancer. This review outlines the diverse roles of amino acids within the tumor and in the tumor microenvironment. Beyond their role in biosynthesis, they serve as energy sources and help maintain redox balance. In addition, amino acid derivatives contribute to epigenetic regulation and immune responses linked to tumorigenesis and metastasis. Furthermore, in discussing the transporters and transaminases that mediate amino acid uptake and synthesis, we identify potential metabolic liabilities as targets for therapeutic intervention.
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Affiliation(s)
- Elizabeth L. Lieu
- 0000 0001 2175 0319grid.185648.6Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL USA
| | - Tu Nguyen
- 0000 0001 2175 0319grid.185648.6Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL USA
| | - Shawn Rhyne
- 0000 0001 2175 0319grid.185648.6Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL USA
| | - Jiyeon Kim
- 0000 0001 2175 0319grid.185648.6Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL USA
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11
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Ciccarone F, Di Leo L, Lazzarino G, Maulucci G, Di Giacinto F, Tavazzi B, Ciriolo MR. Aconitase 2 inhibits the proliferation of MCF-7 cells promoting mitochondrial oxidative metabolism and ROS/FoxO1-mediated autophagic response. Br J Cancer 2019; 122:182-193. [PMID: 31819175 PMCID: PMC7051954 DOI: 10.1038/s41416-019-0641-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/03/2019] [Accepted: 10/28/2019] [Indexed: 12/22/2022] Open
Abstract
Background Deregulation of the tricarboxylic acid cycle (TCA) due to mutations in specific enzymes or defective aerobic metabolism is associated with tumour growth. Aconitase 2 (ACO2) participates in the TCA cycle by converting citrate to isocitrate, but no evident demonstrations of its involvement in cancer metabolism have been provided so far. Methods Biochemical assays coupled with molecular biology, in silico, and cellular tools were applied to circumstantiate the impact of ACO2 in the breast cancer cell line MCF-7 metabolism. Fluorescence lifetime imaging microscopy (FLIM) of NADH was used to corroborate the changes in bioenergetics. Results We showed that ACO2 levels are decreased in breast cancer cell lines and human tumour biopsies. We generated ACO2- overexpressing MCF-7 cells and employed comparative analyses to identify metabolic adaptations. We found that increased ACO2 expression impairs cell proliferation and commits cells to redirect pyruvate to mitochondria, which weakens Warburg-like bioenergetic features. We also demonstrated that the enhancement of oxidative metabolism was supported by mitochondrial biogenesis and FoxO1-mediated autophagy/mitophagy that sustains the increased ROS burst. Conclusions This work identifies ACO2 as a relevant gene in cancer metabolic rewiring of MCF-7 cells, promoting a different utilisation of pyruvate and revealing the potential metabolic vulnerability of ACO2-associated malignancies.
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Affiliation(s)
- Fabio Ciccarone
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, Rome, 00133, Italy
| | - Luca Di Leo
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, Rome, 00133, Italy.,Danish Cancer Society Research Center, Unit of Cell Stress and Survival, Strandboulevarden 49, DK-2100, Copenhagen, Denmark
| | - Giacomo Lazzarino
- UniCamillus-Saint Camillus International University of Health Sciences, via di Sant'Alessandro 8, 00131, Rome, Italy
| | - Giuseppe Maulucci
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168, Rome, Italy.,Institute of Physics, Catholic University of Rome, Largo F. Vito 1, 00168, Rome, Italy
| | - Flavio Di Giacinto
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168, Rome, Italy.,Institute of Physics, Catholic University of Rome, Largo F. Vito 1, 00168, Rome, Italy
| | - Barbara Tavazzi
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168, Rome, Italy.,Institute of Biochemistry and Clinical Biochemistry, Catholic University of Rome, Largo F. Vito 1, 00168, Rome, Italy
| | - Maria Rosa Ciriolo
- Department of Biology, University of Rome "Tor Vergata", Via della Ricerca Scientifica 1, Rome, 00133, Italy. .,IRCCS San Raffaele Pisana, Via della Pisana 235, Rome, 00163, Italy.
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12
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Radu AG, Torch S, Fauvelle F, Pernet-Gallay K, Lucas A, Blervaque R, Delmas V, Schlattner U, Lafanechère L, Hainaut P, Tricaud N, Pingault V, Bondurand N, Bardeesy N, Larue L, Thibert C, Billaud M. LKB1 specifies neural crest cell fates through pyruvate-alanine cycling. SCIENCE ADVANCES 2019; 5:eaau5106. [PMID: 31328154 PMCID: PMC6636984 DOI: 10.1126/sciadv.aau5106] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 06/10/2019] [Indexed: 05/08/2023]
Abstract
Metabolic processes underlying the development of the neural crest, an embryonic population of multipotent migratory cells, are poorly understood. Here, we report that conditional ablation of the Lkb1 tumor suppressor kinase in mouse neural crest stem cells led to intestinal pseudo-obstruction and hind limb paralysis. This phenotype originated from a postnatal degeneration of the enteric nervous ganglia and from a defective differentiation of Schwann cells. Metabolomic profiling revealed that pyruvate-alanine conversion is enhanced in the absence of Lkb1. Mechanistically, inhibition of alanine transaminases restored glial differentiation in an mTOR-dependent manner, while increased alanine level directly inhibited the glial commitment of neural crest cells. Treatment with the metabolic modulator AICAR suppressed mTOR signaling and prevented Schwann cell and enteric defects of Lkb1 mutant mice. These data uncover a link between pyruvate-alanine cycling and the specification of glial cell fate with potential implications in the understanding of the molecular pathogenesis of neural crest diseases.
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Affiliation(s)
- Anca G. Radu
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Sakina Torch
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Florence Fauvelle
- Univ. Grenoble Alpes, INSERM, U1216, Grenoble Institute of Neurosciences GIN, 38000 Grenoble, France
- Univ. Grenoble Alpes, INSERM, US17, MRI facility IRMaGe, 38000 Grenoble, France
| | - Karin Pernet-Gallay
- Univ. Grenoble Alpes, INSERM, U1216, Grenoble Institute of Neurosciences GIN, 38000 Grenoble, France
| | - Anthony Lucas
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Renaud Blervaque
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Véronique Delmas
- Institut Curie, Normal and Pathological Development of Melanocytes, CNRS UMR3347; INSERM U1021; Equipe Labellisée–Ligue Nationale Contre le Cancer, Orsay, France
| | - Uwe Schlattner
- Laboratory of Fundamental and Applied Bioenergetics, Univ Grenoble Alpes, 38185 Grenoble, France
- INSERM U1055, 38041 Grenoble France
| | - Laurence Lafanechère
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Pierre Hainaut
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Nicolas Tricaud
- INSERM U1051, Institut des Neurosciences de Montpellier (INM), Université de Montpellier, Montpellier, France
| | | | | | - Nabeel Bardeesy
- Cancer Center, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA
- Center for Regenerative Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02114, USA
| | - Lionel Larue
- Institut Curie, Normal and Pathological Development of Melanocytes, CNRS UMR3347; INSERM U1021; Equipe Labellisée–Ligue Nationale Contre le Cancer, Orsay, France
| | - Chantal Thibert
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
- Corresponding author. (M.B.); (C.T.)
| | - Marc Billaud
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
- “Clinical and experimental model of lymphomagenesis” Univ Lyon, Université Claude Bernard Lyon1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de recherche en cancérologie de Lyon, Lyon France
- Corresponding author. (M.B.); (C.T.)
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13
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Caldez MJ, Van Hul N, Koh HWL, Teo XQ, Fan JJ, Tan PY, Dewhurst MR, Too PG, Talib SZA, Chiang BE, Stünkel W, Yu H, Lee P, Fuhrer T, Choi H, Björklund M, Kaldis P. Metabolic Remodeling during Liver Regeneration. Dev Cell 2018; 47:425-438.e5. [PMID: 30344111 DOI: 10.1016/j.devcel.2018.09.020] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 05/13/2018] [Accepted: 09/21/2018] [Indexed: 12/29/2022]
Abstract
Liver disease is linked to a decreased capacity of hepatocytes to divide. In addition, cellular metabolism is important for tissue homeostasis and regeneration. Since metabolic changes are a hallmark of liver disease, we investigated the connections between metabolism and cell division. We determined global metabolic changes at different stages of liver regeneration using a combination of integrated transcriptomic and metabolomic analyses with advanced functional redox in vivo imaging. Our data indicate that blocking hepatocyte division during regeneration leads to mitochondrial dysfunction and downregulation of oxidative pathways. This resulted in an increased redox ratio and hyperactivity of alanine transaminase allowing the production of alanine and α-ketoglutarate from pyruvate when mitochondrial functions are impaired. Our data suggests that during liver regeneration, cell division leads to hepatic metabolic remodeling. Moreover, we demonstrate that hepatocytes are equipped with a flexible metabolic machinery able to adapt dynamically to changes during tissue regeneration.
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Affiliation(s)
- Matias J Caldez
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; National University of Singapore (NUS), Department of Biochemistry, Singapore 117597, Republic of Singapore
| | - Noémi Van Hul
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore
| | - Hiromi W L Koh
- Saw Swee Hock School of Public Health, National University of Singapore, 12 Science Drive 2, Singapore 117549, Republic of Singapore
| | - Xing Qi Teo
- Singapore Bio-Imaging Consortium, A(∗)STAR, Singapore, Republic of Singapore
| | - Jun Jun Fan
- Institute of Bioengineering and Nanotechnology, A(∗)STAR, The Nanos, #04-01, 31 Biopolis Way, Singapore 138669, Republic of Singapore; Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #10-01 CREATE Tower, Singapore 138602, Republic of Singapore; Department of Orthopaedic Surgery, Xi Jing Hospital, Fourth Military Medical University, #88 Jiefang Road, Xi'an 710032, China
| | - Peck Yean Tan
- Singapore Institute of Clinical Sciences, A(∗)STAR, Singapore, Republic of Singapore
| | - Matthew R Dewhurst
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; Faculty of Biology, Medicine and Health, University of Manchester, AV Hill Building, Oxford Road, Manchester M13 9PT, UK
| | - Peh Gek Too
- Singapore Institute of Clinical Sciences, A(∗)STAR, Singapore, Republic of Singapore
| | - S Zakiah A Talib
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore
| | - Beatrice E Chiang
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore
| | - Walter Stünkel
- Singapore Institute of Clinical Sciences, A(∗)STAR, Singapore, Republic of Singapore
| | - Hanry Yu
- Institute of Bioengineering and Nanotechnology, A(∗)STAR, The Nanos, #04-01, 31 Biopolis Way, Singapore 138669, Republic of Singapore; Department of Physiology, Yong Loo Lin School of Medicine, MD9-04-11, 2 Medical Drive, Singapore 117597, Republic of Singapore; Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Republic of Singapore; Gastroenterology Department, Southern Medical University, Guangzhou 510515, China
| | - Philip Lee
- Singapore Bio-Imaging Consortium, A(∗)STAR, Singapore, Republic of Singapore
| | - Tobias Fuhrer
- Institute of Molecular Systems Biology, ETH Zürich, Zürich, Switzerland
| | - Hyungwon Choi
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; Saw Swee Hock School of Public Health, National University of Singapore, 12 Science Drive 2, Singapore 117549, Republic of Singapore
| | - Mikael Björklund
- Zhejiang University-University of Edinburgh (ZJU-UoE) Institute, Zhejiang University School of Medicine, International Campus, Zhejiang University, 718 East Haizhou Rd, Haining, Zhejiang 314400, China
| | - Philipp Kaldis
- Institute of Molecular and Cell Biology (IMCB), A(∗)STAR (Agency for Science, Technology and Research), 61 Biopolis Drive, Proteos #3-09, Singapore 138673, Republic of Singapore; National University of Singapore (NUS), Department of Biochemistry, Singapore 117597, Republic of Singapore.
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14
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Li X, Han G, Li X, Kan Q, Fan Z, Li Y, Ji Y, Zhao J, Zhang M, Grigalavicius M, Berge V, Goscinski MA, Nesland JM, Suo Z. Mitochondrial pyruvate carrier function determines cell stemness and metabolic reprogramming in cancer cells. Oncotarget 2018. [PMID: 28624784 PMCID: PMC5542273 DOI: 10.18632/oncotarget.18199] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
One of the remarkable features of cancer cells is aerobic glycolysis, a phenomenon known as the "Warburg Effect", in which cells rely preferentially on glycolysis instead of oxidative phosphorylation (OXPHOS) as the main energy source even in the presence of high oxygen tension. Cells with dysfunctional mitochondria are unable to generate sufficient ATP from mitochondrial OXPHOS, and then are forced to rely on glycolysis for ATP generation. Here we report our results in a prostate cancer cell line in which the mitochondrial pyruvate carrier 1 (MPC1) gene was knockout. It was discovered that the MPC1 gene knockout cells revealed a metabolism reprogramming to aerobic glycolysis with reduced ATP production, and the cells became more migratory and resistant to both chemotherapy and radiotherapy. In addition, the MPC1 knockout cells expressed significantly higher levels of the stemness markers Nanog, Hif1α, Notch1, CD44 and ALDH. To further verify the correlation of MPC gene function and cell stemness/metabolic reprogramming, MPC inhibitor UK5099 was applied in two ovarian cancer cell lines and similar results were obtained. Taken together, our results reveal that functional MPC may determine the fate of metabolic program and the stemness status of cancer cells in vitro.
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Affiliation(s)
- Xiaoli Li
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China.,Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0379, Norway
| | - Gaoyang Han
- Department of Thoracic Surgery, The First Affiliated Hospital of Xinxiang Medical University, Weihui City, Henan Province, 453000, China
| | - Xiaoran Li
- Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0379, Norway
| | - Quancheng Kan
- Department of Clinical Pharmacology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China
| | - Zhirui Fan
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China
| | - Yaqing Li
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China.,Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0379, Norway
| | - Yasai Ji
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China
| | - Jing Zhao
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China
| | - Mingzhi Zhang
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China
| | - Mantas Grigalavicius
- Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0379, Norway
| | - Viktor Berge
- Department of Urology, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, 0379, Norway
| | - Mariusz Adam Goscinski
- Department of Surgery, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, 0379, Norway
| | - Jahn M Nesland
- Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0379, Norway
| | - Zhenhe Suo
- Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, 450000, China.,Department of Pathology, The Norwegian Radium Hospital, Oslo University Hospital, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, 0379, Norway
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15
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16
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Ježek J, Plecitá-Hlavatá L, Ježek P. Aglycemic HepG2 Cells Switch From Aminotransferase Glutaminolytic Pathway of Pyruvate Utilization to Complete Krebs Cycle at Hypoxia. Front Endocrinol (Lausanne) 2018; 9:637. [PMID: 30416487 PMCID: PMC6212521 DOI: 10.3389/fendo.2018.00637] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/08/2018] [Indexed: 01/29/2023] Open
Abstract
Human hepatocellular carcinoma HepG2 cells are forced to oxidative phosphorylation (OXPHOS), when cultured in aglycemic conditions at galactose and glutamine. These Oxphos cells represent a prototype of cancer cell bioenergetics with mixed aerobic glycolysis and OXPHOS. We aimed to determine fractions of (i) glutaminolytic pathway involving aminotransferase reaction supplying 2-oxoglutarate (2OG) to the Krebs cycle vs. (ii) active segment of the Krebs cycle with aconitase and isocitrate dehydrogenase-3 (ACO-IDH3), which is typically inactive in cancer cells due to the citrate export from mitochondria. At normoxia, Oxphos cell respiration was decreased down to ~15 and ~10% by the aminotransferase inhibitor aminooxyacetate (AOA) or with AOA plus the glutamate-dehydrogenase inhibitor bithionol, respectively. Phosphorylating to non-phosphorylating respiration ratios dropped from >6.5 to 1.9 with AOA and to zero with AOA plus bithionol. Thus, normoxic Oxphos HepG2 cells rely predominantly on glutaminolysis. Addition of membrane-permeant dimethyl-2-oxoglutarate (dm2OG) to inhibited cells instantly partially restored respiration, evidencing the lack of 2OG-dehydrogenase substrate upon aminotransferase inhibition. Surprisingly, after 72 hr of 5% O2 hypoxia, the AOA (bithionol) inhibition ceased and respiration was completely restored. Thus in aglycemic HepG2 cells, the hypoxia-induced factor (HIF) upregulation of glycolytic enzymes enabled acceleration of glycolysis pathway, preceded by galactolysis (Leloir pathway), redirecting pyruvate via still incompletely blocked pyruvate dehydrogenase toward the ACO-IDH3. Glycolytic flux upregulation at hypoxia was evidently matched by a higher activity of the Leloir pathway in Oxphos cells. Hypoxic Oxphos cells increased 2-fold the NADPH oxidase activity, whereas hypoxic glycolytic cells decreased it. Oxphos cells and glycolytic cells at 5 mM glucose decreased their reduced glutathione fraction. In contrast to aglycemic cells, glycolytic HepG2 cells decreased their respiration at hypoxia despite the dm2OG presence, i.e., even at unlimited respiratory substrate availability for 72 hr at 5% O2, exhibiting the canonical HIF-mediated adaptation. Nevertheless, their ATP content was much higher with dm2OG as compared to its absence during hypoxic adaptation. Thus, the metabolic plasticity of cancer cells is illustrated under conditions frequently established for solid tumors in vivo, such as aglycemia plus hypoxia. Consequently, a wide acceptance of the irreversible and exclusive Warburg phenotype in cancer cells is incorrect.
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17
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Itkonen HM, Gorad SS, Duveau DY, Martin SES, Barkovskaya A, Bathen TF, Moestue SA, Mills IG. Inhibition of O-GlcNAc transferase activity reprograms prostate cancer cell metabolism. Oncotarget 2017; 7:12464-76. [PMID: 26824323 PMCID: PMC4914298 DOI: 10.18632/oncotarget.7039] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 01/19/2016] [Indexed: 12/29/2022] Open
Abstract
Metabolic networks are highly connected and complex, but a single enzyme, O-GlcNAc transferase (OGT) can sense the availability of metabolites and also modify target proteins. We show that inhibition of OGT activity inhibits the proliferation of prostate cancer cells, leads to sustained loss of c-MYC and suppresses the expression of CDK1, elevated expression of which predicts prostate cancer recurrence (p=0.00179). Metabolic profiling revealed decreased glucose consumption and lactate production after OGT inhibition. This decreased glycolytic activity specifically sensitized prostate cancer cells, but not cells representing normal prostate epithelium, to inhibitors of oxidative phosphorylation (rotenone and metformin). Intra-cellular alanine was depleted upon OGT inhibitor treatment. OGT inhibitor increased the expression and activity of alanine aminotransferase (GPT2), an enzyme that can be targeted with a clinically approved drug, cycloserine. Simultaneous inhibition of OGT and GPT2 inhibited cell viability and growth rate, and additionally activated a cell death response. These combinatorial effects were predominantly seen in prostate cancer cells, but not in a cell-line derived from normal prostate epithelium. Combinatorial treatments were confirmed with two inhibitors against both OGT and GPT2. Taken together, here we report the reprogramming of energy metabolism upon inhibition of OGT activity, and identify synergistically lethal combinations that are prostate cancer cell specific.
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Affiliation(s)
- Harri M Itkonen
- Prostate Cancer Research Group, Centre for Molecular Medicine (Norway), University of Oslo and Oslo University Hospitals, Gaustadalleen, Oslo, Norway
| | - Saurabh S Gorad
- Department of Circulation and Medical Imaging, NTNU, Trondheim, Norway.,St. Olavs University Hospital, Trondheim, Norway
| | - Damien Y Duveau
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, MD, USA
| | - Sara E S Martin
- Department of Microbiology and Immunobiology, Harvard Medical School, Harvard Institutes of Medicine, Boston, MA, USA
| | - Anna Barkovskaya
- Department of Circulation and Medical Imaging, NTNU, Trondheim, Norway.,Department of Tumor Biology, Institute for Cancer Research, Radium hospital, Oslo University Hospital, Oslo, Norway
| | - Tone F Bathen
- Department of Circulation and Medical Imaging, NTNU, Trondheim, Norway
| | - Siver A Moestue
- Department of Circulation and Medical Imaging, NTNU, Trondheim, Norway.,St. Olavs University Hospital, Trondheim, Norway
| | - Ian G Mills
- Prostate Cancer Research Group, Centre for Molecular Medicine (Norway), University of Oslo and Oslo University Hospitals, Gaustadalleen, Oslo, Norway.,Department of Molecular Oncology, Oslo University Hospitals, Oslo, Norway.,PCUK/Movember Centre of Excellence for Prostate Cancer Research, Centre for Cancer Research and Cell Biology (CCRCB), Queen's University Belfast, Belfast, UK
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18
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Lakhia R, Yheskel M, Flaten A, Quittner-Strom EB, Holland WL, Patel V. PPARα agonist fenofibrate enhances fatty acid β-oxidation and attenuates polycystic kidney and liver disease in mice. Am J Physiol Renal Physiol 2017; 314:F122-F131. [PMID: 28903946 DOI: 10.1152/ajprenal.00352.2017] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Peroxisome proliferator-activated receptor α (PPARα) is a nuclear hormone receptor that promotes fatty acid β-oxidation (FAO) and oxidative phosphorylation (OXPHOS). We and others have recently shown that PPARα and its target genes are downregulated, and FAO and OXPHOS are impaired in autosomal dominant polycystic kidney disease (ADPKD). However, whether PPARα and FAO/OXPHOS are causally linked to ADPKD progression is not entirely clear. We report that expression of PPARα and FAO/OXPHOS genes is downregulated, and in vivo β-oxidation rate of 3H-labeled triolein is reduced in Pkd1RC/RC mice, a slowly progressing orthologous model of ADPKD that closely mimics the human ADPKD phenotype. To evaluate the effects of upregulating PPARα, we conducted a 5-mo, randomized, preclinical trial by treating Pkd1RC/RC mice with fenofibrate, a clinically available PPARα agonist. Fenofibrate treatment resulted in increased expression of PPARα and FAO/OXPHOS genes, upregulation of peroxisomal and mitochondrial biogenesis markers, and higher β-oxidation rates in Pkd1RC/RC kidneys. MRI-assessed total kidney volume and total cyst volume, kidney-weight-to-body-weight ratio, cyst index, and serum creatinine levels were significantly reduced in fenofibrate-treated compared with untreated littermate Pkd1RC/RC mice. Moreover, fenofibrate treatment was associated with reduced kidney cyst proliferation and infiltration by inflammatory cells, including M2-like macrophages. Finally, fenofibrate treatment also reduced bile duct cyst number, cyst proliferation, and liver inflammation and fibrosis. In conclusion, our studies suggest that promoting PPARα activity to enhance mitochondrial metabolism may be a useful therapeutic strategy for ADPKD.
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Affiliation(s)
- Ronak Lakhia
- Department of Internal Medicine and Division of Nephrology, University of Texas Southwestern Medical Center , Dallas, Texas
| | - Matanel Yheskel
- Department of Internal Medicine and Division of Nephrology, University of Texas Southwestern Medical Center , Dallas, Texas
| | - Andrea Flaten
- Department of Internal Medicine and Division of Nephrology, University of Texas Southwestern Medical Center , Dallas, Texas
| | - Ezekiel B Quittner-Strom
- Department of Internal Medicine and Touchstone Diabetes Center University of Texas Southwestern Medical Center , Dallas, Texas
| | - William L Holland
- Department of Internal Medicine and Touchstone Diabetes Center University of Texas Southwestern Medical Center , Dallas, Texas
| | - Vishal Patel
- Department of Internal Medicine and Division of Nephrology, University of Texas Southwestern Medical Center , Dallas, Texas
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19
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Redel BK, Tessanne KJ, Spate LD, Murphy CN, Prather RS. Arginine increases development of in vitro-produced porcine embryos and affects the protein arginine methyltransferase-dimethylarginine dimethylaminohydrolase-nitric oxide axis. Reprod Fertil Dev 2017; 27:655-66. [PMID: 25765074 DOI: 10.1071/rd14293] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Accepted: 02/14/2015] [Indexed: 12/15/2022] Open
Abstract
Culture systems promote development at rates lower than the in vivo environment. Here, we evaluated the embryo's transcriptome to determine what the embryo needs during development. A previous mRNA sequencing endeavour found upregulation of solute carrier family 7 (cationic amino acid transporter, y+ system), member 1 (SLC7A1), an arginine transporter, in in vitro- compared with in vivo-cultured embryos. In the present study, we added different concentrations of arginine to our culture medium to meet the needs of the porcine embryo. Increasing arginine from 0.12 to 1.69mM improved the number of embryos that developed to the blastocyst stage. These blastocysts also had more total nuclei compared with controls and, specifically, more trophectoderm nuclei. Embryos cultured in 1.69mM arginine had lower SLC7A1 levels and a higher abundance of messages involved with glycolysis (hexokinase 1, hexokinase 2 and glutamic pyruvate transaminase (alanine aminotransferase) 2) and decreased expression of genes involved with blocking the tricarboxylic acid cycle (pyruvate dehydrogenase kinase, isozyme 1) and the pentose phosphate pathway (transaldolase 1). Expression of the protein arginine methyltransferase (PRMT) genes PRMT1, PRMT3 and PRMT5 throughout development was not affected by arginine. However, the dimethylarginine dimethylaminohydrolase 1 (DDAH1) and DDAH2 message was found to be differentially regulated through development, and the DDAH2 protein was localised to the nuclei of blastocysts. Arginine has a positive effect on preimplantation development and may be affecting the nitric oxide-DDAH-PRMT axis.
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Affiliation(s)
- Bethany K Redel
- Division of Animal Science, Animal Science Research Center, 920 East Campus Drive, Columbia, MO 65211, USA
| | - Kimberly J Tessanne
- Division of Animal Science, Animal Science Research Center, 920 East Campus Drive, Columbia, MO 65211, USA
| | - Lee D Spate
- Division of Animal Science, Animal Science Research Center, 920 East Campus Drive, Columbia, MO 65211, USA
| | - Clifton N Murphy
- Division of Animal Science, Animal Science Research Center, 920 East Campus Drive, Columbia, MO 65211, USA
| | - Randall S Prather
- Division of Animal Science, Animal Science Research Center, 920 East Campus Drive, Columbia, MO 65211, USA
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20
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Lavrova AI, Postnikov EB, Zyubin AY, Babak SV. Ordinary differential equations and Boolean networks in application to modelling of 6-mercaptopurine metabolism. ROYAL SOCIETY OPEN SCIENCE 2017; 4:160872. [PMID: 28484608 PMCID: PMC5414245 DOI: 10.1098/rsos.160872] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 03/14/2017] [Indexed: 06/05/2023]
Abstract
We consider two approaches to modelling the cell metabolism of 6-mercaptopurine, one of the important chemotherapy drugs used for treating acute lymphocytic leukaemia: kinetic ordinary differential equations, and Boolean networks supplied with one controlling node, which takes continual values. We analyse their interplay with respect to taking into account ATP concentration as a key parameter of switching between different pathways. It is shown that the Boolean networks, which allow avoiding the complexity of general kinetic modelling, preserve the possibility of reproducing the principal switching mechanism.
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Affiliation(s)
- Anastasia I. Lavrova
- Immanuel Kant Baltic Federal University, A. Nevskogo st. 14A, Kaliningrad, Russia
- St Petersburg Research Institute of Phthisiopulmonology, Polytechnicheskaya st. 32, Saint-Petersburg, Russia
| | - Eugene B. Postnikov
- Department of Theoretical Physics, Kursk State University, Radishcheva st. 33, Kursk, Russia
| | - Andrey Yu. Zyubin
- Immanuel Kant Baltic Federal University, A. Nevskogo st. 14A, Kaliningrad, Russia
| | - Svetlana V. Babak
- Immanuel Kant Baltic Federal University, A. Nevskogo st. 14A, Kaliningrad, Russia
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21
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Rauckhorst AJ, Taylor EB. Mitochondrial pyruvate carrier function and cancer metabolism. Curr Opin Genet Dev 2016; 38:102-109. [PMID: 27269731 DOI: 10.1016/j.gde.2016.05.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 04/29/2016] [Accepted: 05/12/2016] [Indexed: 12/12/2022]
Abstract
Metabolic reprogramming in cancer supports the increased biosynthesis required for unchecked proliferation. Increased glucose utilization is a defining feature of many cancers that is accompanied by altered pyruvate partitioning and mitochondrial metabolism. Cancer cells also require mitochondrial tricarboxylic acid cycle activity and electron transport chain function for biosynthetic competency and proliferation. Recent evidence demonstrates that mitochondrial pyruvate carrier (MPC) function is abnormal in some cancers and that increasing MPC activity may decrease cancer proliferation. Here we examine recent findings on MPC function and cancer metabolism. Special emphasis is placed on the compartmentalization of pyruvate metabolism and the alternative routes of metabolism that maintain the cellular biosynthetic pools required for unrestrained proliferation in cancer.
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Affiliation(s)
- Adam J Rauckhorst
- Department of Biochemistry, Fraternal Order of the Eagles Diabetes Research Center, Abboud Cardiovascular Research Center, Holden Comprehensive Cancer Center, and Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Eric B Taylor
- Department of Biochemistry, Fraternal Order of the Eagles Diabetes Research Center, Abboud Cardiovascular Research Center, Holden Comprehensive Cancer Center, and Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
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Mazzalupo S, Isoe J, Belloni V, Scaraffia PY. Effective disposal of nitrogen waste in blood-fed Aedes aegypti mosquitoes requires alanine aminotransferase. FASEB J 2016; 30:111-20. [PMID: 26310269 PMCID: PMC4684537 DOI: 10.1096/fj.15-277087] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 08/13/2015] [Indexed: 01/01/2023]
Abstract
To better understand the mechanisms responsible for the success of female mosquitoes in their disposal of excess nitrogen, we investigated the role of alanine aminotransferase (ALAT) in blood-fed Aedes aegypti. Transcript and protein levels from the 2 ALAT genes were analyzed in sucrose- and blood-fed A. aegypti tissues. ALAT1 and ALAT2 exhibit distinct expression patterns in tissues during the first gonotrophic cycle. Injection of female mosquitoes with either double-stranded RNA (dsRNA)-ALAT1 or dsRNA ALAT2 significantly decreased mRNA and protein levels of ALAT1 or ALAT2 in fat body, thorax, and Malpighian tubules compared with dsRNA firefly luciferase-injected control mosquitoes. The silencing of either A. aegypti ALAT1 or ALAT2 caused unexpected phenotypes such as a delay in blood digestion, a massive accumulation of uric acid in the midgut posterior region, and a significant decrease of nitrogen waste excretion during the first 48 h after blood feeding. Concurrently, the expression of genes encoding xanthine dehydrogenase and ammonia transporter (Rhesus 50 glycoprotein) were significantly increased in tissues of both ALAT1- and ALAT2-deficient females. Moreover, perturbation of ALAT1 and ALAT2 in the female mosquitoes delayed oviposition and reduced egg production. These novel findings underscore the efficient mechanisms that blood-fed mosquitoes use to avoid ammonia toxicity and free radical damage.-Mazzalupo, S., Isoe, J., Belloni, V., Scaraffia, P. Y. Effective disposal of nitrogen waste in blood-fed Aedes aegypti mosquitoes requires alanine aminotransferase.
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Affiliation(s)
- Stacy Mazzalupo
- *Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona, USA; and Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Jun Isoe
- *Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona, USA; and Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Virginia Belloni
- *Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona, USA; and Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, New Orleans, Louisiana, USA
| | - Patricia Y Scaraffia
- *Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona, USA; and Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, New Orleans, Louisiana, USA
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Dysregulated metabolism contributes to oncogenesis. Semin Cancer Biol 2015; 35 Suppl:S129-S150. [PMID: 26454069 DOI: 10.1016/j.semcancer.2015.10.002] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 09/30/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022]
Abstract
Cancer is a disease characterized by unrestrained cellular proliferation. In order to sustain growth, cancer cells undergo a complex metabolic rearrangement characterized by changes in metabolic pathways involved in energy production and biosynthetic processes. The relevance of the metabolic transformation of cancer cells has been recently included in the updated version of the review "Hallmarks of Cancer", where dysregulation of cellular metabolism was included as an emerging hallmark. While several lines of evidence suggest that metabolic rewiring is orchestrated by the concerted action of oncogenes and tumor suppressor genes, in some circumstances altered metabolism can play a primary role in oncogenesis. Recently, mutations of cytosolic and mitochondrial enzymes involved in key metabolic pathways have been associated with hereditary and sporadic forms of cancer. Together, these results demonstrate that aberrant metabolism, once seen just as an epiphenomenon of oncogenic reprogramming, plays a key role in oncogenesis with the power to control both genetic and epigenetic events in cells. In this review, we discuss the relationship between metabolism and cancer, as part of a larger effort to identify a broad-spectrum of therapeutic approaches. We focus on major alterations in nutrient metabolism and the emerging link between metabolism and epigenetics. Finally, we discuss potential strategies to manipulate metabolism in cancer and tradeoffs that should be considered. More research on the suite of metabolic alterations in cancer holds the potential to discover novel approaches to treat it.
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Hepatic Mitochondrial Pyruvate Carrier 1 Is Required for Efficient Regulation of Gluconeogenesis and Whole-Body Glucose Homeostasis. Cell Metab 2015; 22:669-81. [PMID: 26344103 PMCID: PMC4754674 DOI: 10.1016/j.cmet.2015.07.027] [Citation(s) in RCA: 165] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/30/2015] [Accepted: 07/30/2015] [Indexed: 01/21/2023]
Abstract
Gluconeogenesis is critical for maintenance of euglycemia during fasting. Elevated gluconeogenesis during type 2 diabetes (T2D) contributes to chronic hyperglycemia. Pyruvate is a major gluconeogenic substrate and requires import into the mitochondrial matrix for channeling into gluconeogenesis. Here, we demonstrate that the mitochondrial pyruvate carrier (MPC) comprising the Mpc1 and Mpc2 proteins is required for efficient regulation of hepatic gluconeogenesis. Liver-specific deletion of Mpc1 abolished hepatic MPC activity and markedly decreased pyruvate-driven gluconeogenesis and TCA cycle flux. Loss of MPC activity induced adaptive utilization of glutamine and increased urea cycle activity. Diet-induced obesity increased hepatic MPC expression and activity. Constitutive Mpc1 deletion attenuated the development of hyperglycemia induced by a high-fat diet. Acute, virally mediated Mpc1 deletion after diet-induced obesity decreased hyperglycemia and improved glucose tolerance. We conclude that the MPC is required for efficient regulation of gluconeogenesis and that the MPC contributes to the elevated gluconeogenesis and hyperglycemia in T2D.
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Nicolae A, Wahrheit J, Nonnenmacher Y, Weyler C, Heinzle E. Identification of active elementary flux modes in mitochondria using selectively permeabilized CHO cells. Metab Eng 2015; 32:95-105. [PMID: 26417715 DOI: 10.1016/j.ymben.2015.09.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 09/02/2015] [Accepted: 09/08/2015] [Indexed: 12/23/2022]
Abstract
Metabolic compartmentation is a key feature of mammalian cells. Mitochondria are the powerhouse of eukaryotic cells, responsible for respiration and the TCA cycle. We accessed the mitochondrial metabolism of the economically important Chinese hamster ovary (CHO) cells using selective permeabilization. We tested key substrates without and with addition of ADP. Based on quantified uptake and production rates, we could determine the contribution of different elementary flux modes to the metabolism of a substrate or substrate combination. ADP stimulated the uptake of most metabolites, directly by serving as substrate for the respiratory chain, thus removing the inhibitory effect of NADH, or as allosteric effector. Addition of ADP favored substrate metabolization to CO2 and did not enhance the production of other metabolites. The controlling effect of ADP was more pronounced when we supplied metabolites to the first part of the TCA cycle: pyruvate, citrate, α-ketoglutarate and glutamine. In the second part of the TCA cycle, the rates were primarily controlled by the concentrations of C4-dicarboxylates. Without ADP addition, the activity of the pyruvate carboxylase-malate dehydrogenase-malic enzyme cycle consumed the ATP produced by oxidative phosphorylation, preventing its accumulation and maintaining metabolic steady state conditions. Aspartate was taken up only in combination with pyruvate, whose uptake also increased, a fact explained by complex regulatory effects. Isocitrate dehydrogenase and α-ketoglutarate dehydrogenase were identified as the key regulators of the TCA cycle, confirming existent knowledge from other cells. We have shown that selectively permeabilized cells combined with elementary mode analysis allow in-depth studying of the mitochondrial metabolism and regulation.
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Affiliation(s)
- Averina Nicolae
- Universität des Saarlandes, Technische Biochemie, Campus A 1.5, Saarbrücken D-66123, Germany
| | - Judith Wahrheit
- Universität des Saarlandes, Technische Biochemie, Campus A 1.5, Saarbrücken D-66123, Germany
| | - Yannic Nonnenmacher
- Universität des Saarlandes, Technische Biochemie, Campus A 1.5, Saarbrücken D-66123, Germany
| | - Christian Weyler
- Universität des Saarlandes, Technische Biochemie, Campus A 1.5, Saarbrücken D-66123, Germany
| | - Elmar Heinzle
- Universität des Saarlandes, Technische Biochemie, Campus A 1.5, Saarbrücken D-66123, Germany.
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Causes of upregulation of glycolysis in lymphocytes upon stimulation. A comparison with other cell types. Biochimie 2015; 118:185-94. [PMID: 26382968 DOI: 10.1016/j.biochi.2015.09.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 09/11/2015] [Indexed: 01/24/2023]
Abstract
In this review, we revisit the metabolic shift from respiration to glycolysis in lymphocytes upon activation, which is known as the Warburg effect in tumour cells. We compare the situation in lymphocytes with those in several other cell types, such as muscle cells, Kupffer cells, microglia cells, astrocytes, stem cells, tumour cells and various unicellular organisms (e.g. yeasts). We critically discuss and compare several explanations put forward in the literature for the observation that proliferating cells adopt this apparently less efficient pathway: hypoxia, poisoning of competitors by end products, higher ATP production rate, higher precursor supply, regulatory effects, and avoiding harmful effects (e.g. by reactive oxygen species). We conclude that in the case of lymphocytes, increased ATP production rate and precursor supply are the main advantages of upregulating glycolysis.
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Inhibition study of alanine aminotransferase enzyme using sequential online capillary electrophoresis analysis. Anal Biochem 2014; 467:28-30. [DOI: 10.1016/j.ab.2014.08.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/26/2014] [Accepted: 08/29/2014] [Indexed: 02/02/2023]
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Belloni V, Scaraffia PY. Exposure to L-cycloserine incurs survival costs and behavioral alterations in Aedes aegypti females. Parasit Vectors 2014; 7:373. [PMID: 25129074 PMCID: PMC4261769 DOI: 10.1186/1756-3305-7-373] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 07/17/2014] [Indexed: 11/25/2022] Open
Abstract
Background It was previously demonstrated that alanine aminotransferase (ALAT, EC 2.6.1.2) participates in maintaining the alanine-proline cycle between flight muscles and fat body during Aedes aegypti flight. ALAT is also actively involved in the metabolism of ammonia in A. aegypti. Here, we investigated the survival and behavioral costs of ALAT inhibition in A. aegypti females to better understand the role of ALAT in blood-fed mosquitoes. Methods We analyzed how A. aegypti female mosquitoes respond to blood meals supplemented with 0, 2.5, 5 and 10 mM L-cycloserine, a well-known inhibitor of ALAT in animals. Mosquitoes were also exposed to blood meals supplemented with L-cycloserine and different concentrations of glucose (0, 10 and 100 mM). Additionally, the effects of ALAT inhibitor and glucose in mosquitoes starved for 24 or 48 h were investigated. Survival and behavioral phenotypes were analyzed during a time course (1, 2, 4, 6, 12, 24, 48 and 72 h after feeding). Results L-cycloserine at 10 mM resulted in high mortality relative to control, with an acute effect during the first 6 h after treatment. A significant decrease in the number of active mosquitoes coinciding with an increase in futile wing fanning during the first 24 h was observed at all inhibitor concentrations. A high occurrence of knockdown phenotype was also recorded at this time for both 5 and 10 mM L-cycloserine. The supplementation of glucose in the blood meal amplified the effects of the ALAT inhibitor. In particular, we observed a higher mortality rate concomitant with an increase in the knockdown phenotype. Starvation prior to blood feeding also increased the effects of L-cycloserine with a rapid increase in mortality. Conclusions Our results provide evidence that exposure of high doses of L-cycloserine during A. aegypti blood feeding affects mosquito survival and motor activity, suggesting an interference with carbohydrate and ammonia metabolism in a time-dependent manner. Electronic supplementary material The online version of this article (doi:10.1186/1756-3305-7-373) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Patricia Y Scaraffia
- Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, 1430 Tulane Ave,, SL-17, New Orleans, LA 70112, USA.
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Abstract
The metabolic adaptations that support oncogenic growth can also render cancer cells dependent on certain nutrients. Along with the Warburg effect, increased utilization of glutamine is one of the metabolic hallmarks of the transformed state. Glutamine catabolism is positively regulated by multiple oncogenic signals, including those transmitted by the Rho family of GTPases and by c-Myc. The recent identification of mechanistically distinct inhibitors of glutaminase, which can selectively block cellular transformation, has revived interest in the possibility of targeting glutamine metabolism in cancer therapy. Here, we outline the regulation and roles of glutamine metabolism within cancer cells and discuss possible strategies for, and the consequences of, impacting these processes therapeutically.
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30
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Kumar M, Saini S, Gayen K. Elementary mode analysis reveals that Clostridium acetobutylicum modulates its metabolic strategy under external stress. ACTA ACUST UNITED AC 2014; 10:2090-105. [DOI: 10.1039/c4mb00126e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Clostridium acetobutylicumis a strict anaerobe which exhibits two distinct steps in its metabolic network.
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Affiliation(s)
- Manish Kumar
- Department of Chemical Engineering
- Indian Institute of Technology Gandhinagar
- Ahmedabad - 382424, India
| | - Supreet Saini
- Department of Chemical Engineering
- Indian Institute of Technology Bombay
- Mumbai - 400076, India
| | - Kalyan Gayen
- Department of Chemical Engineering
- National Institute of Technology Agartala
- Tripura - 799053, India
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Sánchez-Aragó M, Formentini L, Cuezva JM. Mitochondria-mediated energy adaption in cancer: the H(+)-ATP synthase-geared switch of metabolism in human tumors. Antioxid Redox Signal 2013; 19:285-98. [PMID: 22901241 PMCID: PMC3691914 DOI: 10.1089/ars.2012.4883] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
SIGNIFICANCE Since the signing of the National Cancer Act in 1971, cancer still remains a major cause of death despite significant progresses made in understanding the biology and treatment of the disease. After many years of ostracism, the peculiar energy metabolism of tumors has been recognized as an additional phenotypic trait of the cancer cell. RECENT ADVANCES While the enhanced aerobic glycolysis of carcinomas has already been translated to bedside for precise tumor imaging and staging of cancer patients, accepting that an impaired bioenergetic function of mitochondria is pivotal to understand energy metabolism of tumors and in its progression is debated. However, mitochondrial bioenergetics and cell death are tightly connected. CRITICAL ISSUES Recent clinical findings indicate that H(+)-ATP synthase, a core component of mitochondrial oxidative phosphorylation, is repressed at both the protein and activity levels in human carcinomas. This review summarizes the relevance that mitochondrial function has to understand energy metabolism of tumors and explores the connection between the bioenergetic function of the organelle and the activity of mitochondria as tumor suppressors. FUTURE DIRECTIONS The reversible nature of energy metabolism in tumors highlights the relevance that the microenvironment has for tumor progression. Moreover, the stimulation of mitochondrial activity or the inhibition of glycolysis suppresses tumor growth. Future research should elucidate the mechanisms promoting the silencing of oxidative phosphorylation in carcinomas. The aim is the development of new therapeutic strategies tackling energy metabolism to eradicate tumors or at least, to maintain tumor dormancy and transform cancer into a chronic disease.
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Affiliation(s)
- María Sánchez-Aragó
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Centro de Investigación Biomédica en Red de Enfermedades Raras, Centro de Investigación Hospital 12 de Octubre, Madrid, Spain
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Vogel KR, Pearl PL, Theodore WH, McCarter RC, Jakobs C, Gibson KM. Thirty years beyond discovery--clinical trials in succinic semialdehyde dehydrogenase deficiency, a disorder of GABA metabolism. J Inherit Metab Dis 2013; 36:401-10. [PMID: 22739941 PMCID: PMC4349389 DOI: 10.1007/s10545-012-9499-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Revised: 05/09/2012] [Accepted: 05/14/2012] [Indexed: 10/28/2022]
Abstract
This review summarizes a presentation made at the retirement Symposium of Prof. Dr. Cornelis Jakobs in November of 2011, highlighting the progress toward clinical trials in succinic semialdehyde dehydrogenase (SSADH) deficiency, a disorder first recognized in 1981. Active and potential clinical interventions, including vigabatrin, L-cycloserine, the GHB receptor antagonist NCS-382, and the ketogenic diet, are discussed. Several biomarkers to gauge clinical efficacy have been identified, including cerebrospinal fluid metabolites, neuropsychiatric testing, MRI, EEG, and measures of GABAergic function including (11 C)flumazenil positron emission tomography (PET) and transcranial magnetic stimulation (TMS). Thirty years after its discovery, encompassing extensive studies in both patients and the corresponding murine model, we are now running an open-label trial of taurine intervention, and are poised to undertake a phase II trial of the GABAB receptor antagonist SGS742.
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Affiliation(s)
- Kara R Vogel
- Section of Clinical Pharmacology, College of Pharmacy, Washington State University, Spokane, WA 99202-2131, USA.
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Jose C, Rossignol R. Rationale for mitochondria-targeting strategies in cancer bioenergetic therapies. Int J Biochem Cell Biol 2012; 45:123-9. [PMID: 22776740 DOI: 10.1016/j.biocel.2012.07.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 06/13/2012] [Accepted: 07/01/2012] [Indexed: 01/24/2023]
Abstract
In the 1920s, Otto Warburg first hypothesized that mitochondrial impairment is a leading cause of cancer although he recognized the existence of oxidative tumors. Likewise, Weinhouse and others in the 50s found that deficient mitochondrial respiration is not an obligatory feature of cancer and Peter Vaupel suggested in the 1990s that tumor oxygenation rather than OXPHOS capacity was the limiting factor of mitochondrial energy production in cancer. Recent studies now clearly indicate that mitochondria are highly functional in mice tumors and the field of oncobioenergetic identified MYC, Oct1 and RAS as pro-OXPHOS oncogenes. In addition, cancer cells adaptation to aglycemia, metabolic symbiosis between hypoxic and non-hypoxic tumor regions as well the reverse Warburg hypothesis support the crucial role of mitochondria in the survival of a subclass of tumors. Therefore, mitochondria are now considered as potential targets for anti-cancer therapy and tentative strategies including a bioenergetic profile characterization of the tumor and the subsequent adapted bioenergetic modulation could be considered for cancer killing. This article is part of a Directed Issue entitled: Bioenergetic dysfunction, adaptation and therapy.
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Affiliation(s)
- Caroline Jose
- Univ. Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), EA 4576, F-33000 Bordeaux, France
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Cooper AJL, Krasnikov BF, Pinto JT, Kung HF, Li J, Ploessl K. Comparative enzymology of (2S,4R)4-fluoroglutamine and (2S,4R)4-fluoroglutamate. Comp Biochem Physiol B Biochem Mol Biol 2012; 163:108-20. [PMID: 22613816 DOI: 10.1016/j.cbpb.2012.05.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 05/11/2012] [Accepted: 05/14/2012] [Indexed: 11/26/2022]
Abstract
Many cancer cells have a strong requirement for glutamine. As an aid for understanding this phenomenon the (18)F-labeled 2S,4R stereoisomer of 4-fluoroglutamine [(2S,4R)4-FGln] was previously developed for in vivo positron emission tomography (PET). In the present work, comparative enzymological studies of unlabeled (2S,4R)4-FGln and its deamidated product (2S,4R)4-FGlu were conducted as an adjunct to these PET studies. Our findings are as follows: Rat kidney preparations catalyze the deamidation of (2S,4R)4-FGln. (2,4R)4-FGln and (2S,4R)4-FGlu are substrates of various aminotransferases. (2S,4R)4-FGlu is a substrate of glutamate dehydrogenase, but not of sheep brain glutamine synthetase. The compound is, however, a strong inhibitor of this enzyme. Rat liver cytosolic fractions catalyze a γ-elimination reaction with (2S,4R)4-FGlu, generating α-ketoglutarate. Coupling of a deamidase reaction with this γ-elimination reaction provides an explanation for the previous detection of (18)F(-) in tumors exposed to [(18)F](2S,4R)4-FGln. One enzyme contributing to this reaction was identified as alanine aminotransferase, which catalyzes competing γ-elimination and aminotransferase reactions with (2S,4R)4-FGlu. This appears to be the first description of an aminotransferase catalyzing a γ-elimination reaction. The present results demonstrate that (2S,4R)4-FGln and (2S,4R)4-FGlu are useful analogues for comparative studies of various glutamine- and glutamate-utilizing enzymes in normal and cancerous mammalian tissues, and suggest that tumors may metabolize (2S,4R)4-FGln in a generally similar fashion to glutamine. In plants, yeast and bacteria a major route for ammonia assimilation involves the consecutive action of glutamate synthase plus glutamine synthetase (glutamate synthase cycle). It is suggested that (2S,4R)4-FGln and (2S,4R)4-FGlu will be useful probes in studies of ammonia assimilation by the glutamate synthase pathway in these organisms. Finally, glutamine transaminases are conserved in mammals, plants and bacteria, and probably serve to close the methionine salvage pathway, thus linking nitrogen metabolism to sulfur metabolism and one-carbon metabolism. It is suggested that (2S,4R)4-FGln may be useful in studies of the methionine salvage pathway in a variety of organisms.
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Affiliation(s)
- Arthur J L Cooper
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA.
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Trinh CT, Thompson RA. Elementary mode analysis: a useful metabolic pathway analysis tool for reprograming microbial metabolic pathways. Subcell Biochem 2012; 64:21-42. [PMID: 23080244 DOI: 10.1007/978-94-007-5055-5_2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Elementary mode analysis is a useful metabolic pathway analysis tool to characterize cellular metabolism. It can identify all feasible metabolic pathways known as elementary modes that are inherent to a metabolic network. Each elementary mode contains a minimal and unique set of enzymatic reactions that can support cellular functions at steady state. Knowledge of all these pathway options enables systematic characterization of cellular phenotypes, analysis of metabolic network properties (e.g. structure, regulation, robustness, and fragility), phenotypic behavior discovery, and rational strain design for metabolic engineering application. This chapter focuses on the application of elementary mode analysis to reprogram microbial metabolic pathways for rational strain design and the metabolic pathway evolution of designed strains.
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Affiliation(s)
- Cong T Trinh
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA,
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