1
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Wang Y, Lilienfeldt N, Hekimi S. Understanding coenzyme Q. Physiol Rev 2024; 104:1533-1610. [PMID: 38722242 DOI: 10.1152/physrev.00040.2023] [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: 10/16/2023] [Revised: 04/08/2024] [Accepted: 05/01/2024] [Indexed: 08/11/2024] Open
Abstract
Coenzyme Q (CoQ), also known as ubiquinone, comprises a benzoquinone head group and a long isoprenoid side chain. It is thus extremely hydrophobic and resides in membranes. It is best known for its complex function as an electron transporter in the mitochondrial electron transport chain (ETC) but is also required for several other crucial cellular processes. In fact, CoQ appears to be central to the entire redox balance of the cell. Remarkably, its structure and therefore its properties have not changed from bacteria to vertebrates. In metazoans, it is synthesized in all cells and is found in most, and maybe all, biological membranes. CoQ is also known as a nutritional supplement, mostly because of its involvement with antioxidant defenses. However, whether there is any health benefit from oral consumption of CoQ is not well established. Here we review the function of CoQ as a redox-active molecule in the ETC and other enzymatic systems, its role as a prooxidant in reactive oxygen species generation, and its separate involvement in antioxidant mechanisms. We also review CoQ biosynthesis, which is particularly complex because of its extreme hydrophobicity, as well as the biological consequences of primary and secondary CoQ deficiency, including in human patients. Primary CoQ deficiency is a rare inborn condition due to mutation in CoQ biosynthetic genes. Secondary CoQ deficiency is much more common, as it accompanies a variety of pathological conditions, including mitochondrial disorders as well as aging. In this context, we discuss the importance, but also the great difficulty, of alleviating CoQ deficiency by CoQ supplementation.
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Affiliation(s)
- Ying Wang
- Department of Biology, McGill University, Montreal, Quebec, Canada
| | - Noah Lilienfeldt
- Department of Biology, McGill University, Montreal, Quebec, Canada
| | - Siegfried Hekimi
- Department of Biology, McGill University, Montreal, Quebec, Canada
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2
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para
-Aminobenzoic Acid Biosynthesis Is Required for Listeria monocytogenes Growth and Pathogenesis. Infect Immun 2022; 90:e0020722. [PMID: 36317877 PMCID: PMC9670987 DOI: 10.1128/iai.00207-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Biosyntheses of
para
-aminobenzoic acid (PABA) and its downstream folic acid metabolites are essential for one-carbon metabolism in all life forms and the targets of sulfonamide and trimethoprim antibiotics. In this study, we identified and characterized two genes (
pabA
and
pabBC
) required for PABA biosynthesis in
Listeria monocytogenes
.
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3
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Wainwright L, Hargreaves IP, Georgian AR, Turner C, Dalton RN, Abbott NJ, Heales SJR, Preston JE. CoQ 10 Deficient Endothelial Cell Culture Model for the Investigation of CoQ 10 Blood-Brain Barrier Transport. J Clin Med 2020; 9:jcm9103236. [PMID: 33050406 PMCID: PMC7601674 DOI: 10.3390/jcm9103236] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/02/2020] [Accepted: 10/06/2020] [Indexed: 12/31/2022] Open
Abstract
Primary coenzyme Q10 (CoQ10) deficiency is unique among mitochondrial respiratory chain disorders in that it is potentially treatable if high-dose CoQ10 supplements are given in the early stages of the disease. While supplements improve peripheral abnormalities, neurological symptoms are only partially or temporarily ameliorated. The reasons for this refractory response to CoQ10 supplementation are unclear, however, a contributory factor may be the poor transfer of CoQ10 across the blood-brain barrier (BBB). The aim of this study was to investigate mechanisms of CoQ10 transport across the BBB, using normal and pathophysiological (CoQ10 deficient) cell culture models. The study identifies lipoprotein-associated CoQ10 transcytosis in both directions across the in vitro BBB. Uptake via SR-B1 (Scavenger Receptor) and RAGE (Receptor for Advanced Glycation Endproducts), is matched by efflux via LDLR (Low Density Lipoprotein Receptor) transporters, resulting in no "net" transport across the BBB. In the CoQ10 deficient model, BBB tight junctions were disrupted and CoQ10 "net" transport to the brain side increased. The addition of anti-oxidants did not improve CoQ10 uptake to the brain side. This study is the first to generate in vitro BBB endothelial cell models of CoQ10 deficiency, and the first to identify lipoprotein-associated uptake and efflux mechanisms regulating CoQ10 distribution across the BBB. The results imply that the uptake of exogenous CoQ10 into the brain might be improved by the administration of LDLR inhibitors, or by interventions to stimulate luminal activity of SR-B1 transporters.
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Affiliation(s)
- Luke Wainwright
- UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK;
| | - Iain P. Hargreaves
- Neurometabolic Unit, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust, London WC1N 3BG, UK;
- Department of Pharmacy and Biomolecular Science, Liverpool John Moores University, Liverpool L3 5UA, UK
| | - Ana R. Georgian
- School of Cancer and Pharmaceutical Sciences, King’s College London, London SE1 9NH, UK; (A.R.G.); (N.J.A.)
| | - Charles Turner
- Evelina London Children’s Hospital, Guy’s and St. Thomas’ NHS Foundation Trust, London SE1 7EH, UK; (C.T.); (R.N.D.)
| | - R. Neil Dalton
- Evelina London Children’s Hospital, Guy’s and St. Thomas’ NHS Foundation Trust, London SE1 7EH, UK; (C.T.); (R.N.D.)
| | - N. Joan Abbott
- School of Cancer and Pharmaceutical Sciences, King’s College London, London SE1 9NH, UK; (A.R.G.); (N.J.A.)
| | - Simon J. R. Heales
- Neurometabolic Unit, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust, London WC1N 3BG, UK;
- UCL Great Ormond Street Institute of Child Health, University College London, London WC1E 6BT, UK;
| | - Jane E. Preston
- School of Cancer and Pharmaceutical Sciences, King’s College London, London SE1 9NH, UK; (A.R.G.); (N.J.A.)
- Correspondence: ; Tel.: +44-207-848-4881
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4
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Abstract
Leukemia is a common hematological malignancy with overall poor prognosis. Novel therapies are needed to improve the outcome of leukemia patients. Cholesterol metabolism reprogramming is a featured alteration in leukemia. Many metabolic-related genes and metabolites are essential to the progress and drug resistance of leukemia. Exploring potential therapeutical targets related to cholesterol homeostasis is a promising area. This review summarized the functions of cholesterol and its derived intermediate metabolites, and also discussed potential agents targeting this metabolic vulnerability in leukemia.
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5
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Coenzyme Q 10 deficiencies: pathways in yeast and humans. Essays Biochem 2018; 62:361-376. [PMID: 29980630 PMCID: PMC6056717 DOI: 10.1042/ebc20170106] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/08/2018] [Accepted: 05/14/2018] [Indexed: 12/23/2022]
Abstract
Coenzyme Q (ubiquinone or CoQ) is an essential lipid that plays a role in mitochondrial respiratory electron transport and serves as an important antioxidant. In human and yeast cells, CoQ synthesis derives from aromatic ring precursors and the isoprene biosynthetic pathway. Saccharomyces cerevisiae coq mutants provide a powerful model for our understanding of CoQ biosynthesis. This review focusses on the biosynthesis of CoQ in yeast and the relevance of this model to CoQ biosynthesis in human cells. The COQ1–COQ11 yeast genes are required for efficient biosynthesis of yeast CoQ. Expression of human homologs of yeast COQ1–COQ10 genes restore CoQ biosynthesis in the corresponding yeast coq mutants, indicating profound functional conservation. Thus, yeast provides a simple yet effective model to investigate and define the function and possible pathology of human COQ (yeast or human gene involved in CoQ biosynthesis) gene polymorphisms and mutations. Biosynthesis of CoQ in yeast and human cells depends on high molecular mass multisubunit complexes consisting of several of the COQ gene products, as well as CoQ itself and CoQ intermediates. The CoQ synthome in yeast or Complex Q in human cells, is essential for de novo biosynthesis of CoQ. Although some human CoQ deficiencies respond to dietary supplementation with CoQ, in general the uptake and assimilation of this very hydrophobic lipid is inefficient. Simple natural products may serve as alternate ring precursors in CoQ biosynthesis in both yeast and human cells, and these compounds may act to enhance biosynthesis of CoQ or may bypass certain deficient steps in the CoQ biosynthetic pathway.
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Fernández-Del-Río L, Nag A, Gutiérrez Casado E, Ariza J, Awad AM, Joseph AI, Kwon O, Verdin E, de Cabo R, Schneider C, Torres JZ, Burón MI, Clarke CF, Villalba JM. Kaempferol increases levels of coenzyme Q in kidney cells and serves as a biosynthetic ring precursor. Free Radic Biol Med 2017; 110:176-187. [PMID: 28603085 PMCID: PMC5539908 DOI: 10.1016/j.freeradbiomed.2017.06.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/29/2017] [Accepted: 06/06/2017] [Indexed: 12/27/2022]
Abstract
Coenzyme Q (Q) is a lipid-soluble antioxidant essential in cellular physiology. Patients with Q deficiencies, with few exceptions, seldom respond to treatment. Current therapies rely on dietary supplementation with Q10, but due to its highly lipophilic nature, Q10 is difficult to absorb by tissues and cells. Plant polyphenols, present in the human diet, are redox active and modulate numerous cellular pathways. In the present study, we tested whether treatment with polyphenols affected the content or biosynthesis of Q. Mouse kidney proximal tubule epithelial (Tkpts) cells and human embryonic kidney cells 293 (HEK 293) were treated with several types of polyphenols, and kaempferol produced the largest increase in Q levels. Experiments with stable isotope 13C-labeled kaempferol demonstrated a previously unrecognized role of kaempferol as an aromatic ring precursor in Q biosynthesis. Investigations of the structure-function relationship of related flavonols showed the importance of two hydroxyl groups, located at C3 of the C ring and C4' of the B ring, both present in kaempferol, as important determinants of kaempferol as a Q biosynthetic precursor. Concurrently, through a mechanism not related to the enhancement of Q biosynthesis, kaempferol also augmented mitochondrial localization of Sirt3. The role of kaempferol as a precursor that increases Q levels, combined with its ability to upregulate Sirt3, identify kaempferol as a potential candidate in the design of interventions aimed on increasing endogenous Q biosynthesis, particularly in kidney.
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Affiliation(s)
- Lucía Fernández-Del-Río
- Departamento de Biología Celular, Fisiología e Inmunología, Universidad de Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
| | - Anish Nag
- Department of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA, USA
| | - Elena Gutiérrez Casado
- Departamento de Biología Celular, Fisiología e Inmunología, Universidad de Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
| | - Julia Ariza
- Departamento de Biología Celular, Fisiología e Inmunología, Universidad de Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
| | - Agape M Awad
- Department of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA, USA
| | - Akil I Joseph
- Department of Pharmacology, and the Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, TN, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA, USA
| | - Eric Verdin
- Buck Institute for Research on Aging, Novato, CA, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Claus Schneider
- Department of Pharmacology, and the Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, TN, USA
| | - Jorge Z Torres
- Department of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA, USA
| | - María I Burón
- Departamento de Biología Celular, Fisiología e Inmunología, Universidad de Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
| | - Catherine F Clarke
- Department of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA, USA
| | - José M Villalba
- Departamento de Biología Celular, Fisiología e Inmunología, Universidad de Córdoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, Spain
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7
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Pierrel F. Impact of Chemical Analogs of 4-Hydroxybenzoic Acid on Coenzyme Q Biosynthesis: From Inhibition to Bypass of Coenzyme Q Deficiency. Front Physiol 2017; 8:436. [PMID: 28690551 PMCID: PMC5479927 DOI: 10.3389/fphys.2017.00436] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 06/08/2017] [Indexed: 12/21/2022] Open
Abstract
Coenzyme Q is a lipid that participates to important physiological functions. Coenzyme Q is synthesized in multiple steps from the precursor 4-hydroxybenzoic acid. Mutations in enzymes that participate to coenzyme Q biosynthesis result in primary coenzyme Q deficiency, a type of mitochondrial disease. Coenzyme Q10 supplementation of patients is the classical treatment but it shows limited efficacy in some cases. The molecular understanding of the coenzyme Q biosynthetic pathway allowed the design of experiments to bypass deficient biosynthetic steps with analogs of 4-hydroxybenzoic acid. These molecules provide the defective chemical group and can reactivate endogenous coenzyme Q biosynthesis as demonstrated recently in yeast, mammalian cell cultures, and mouse models of primary coenzyme Q deficiency. This mini review presents how the chemical properties of various analogs of 4-hydroxybenzoic acid dictate the effect of the molecules on CoQ biosynthesis and how the reactivation of endogenous coenzyme Q biosynthesis may achieve better results than exogenous CoQ10 supplementation.
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Affiliation(s)
- Fabien Pierrel
- Centre National de la Recherche Scientifique, Grenoble INP, TIMC-IMAG, University Grenoble AlpesGrenoble, France
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8
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Pabst T, Kortz L, Fiedler GM, Ceglarek U, Idle JR, Beyoğlu D. The plasma lipidome in acute myeloid leukemia at diagnosis in relation to clinical disease features. BBA CLINICAL 2017; 7:105-114. [PMID: 28331812 PMCID: PMC5357680 DOI: 10.1016/j.bbacli.2017.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 03/04/2017] [Accepted: 03/04/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Early studies established that certain lipids were lower in acute myeloid leukemia (AML) cells than normal leukocytes. Because lipids are now known to play an important role in cell signaling and regulation of homeostasis, and are often perturbed in malignancies, we undertook a comprehensive lipidomic survey of plasma from AML patients at time of diagnosis and also healthy blood donors. METHODS Plasma lipid profiles were measured using three mass spectrometry platforms in 20 AML patients and 20 healthy blood donors. Data were collected on total cholesterol and fatty acids, fatty acid amides, glycerolipids, phospholipids, sphingolipids, cholesterol esters, coenzyme Q10 and eicosanoids. RESULTS We observed a depletion of plasma total fatty acids and cholesterol, but an increase in certain free fatty acids with the observed decline in sphingolipids, phosphocholines, triglycerides and cholesterol esters probably driven by enhanced fatty acid oxidation in AML cells. Arachidonic acid and precursors were elevated in AML, particularly in patients with high bone marrow (BM) or peripheral blasts and unfavorable prognostic risk. PGF2α was also elevated, in patients with low BM or peripheral blasts and with a favorable prognostic risk. A broad panoply of lipid classes is altered in AML plasma, pointing to disturbances of several lipid metabolic interconversions, in particular in relation to blast cell counts and prognostic risk. CONCLUSIONS These data indicate potential roles played by lipids in AML heterogeneity and disease outcome. GENERAL SIGNIFICANCE Enhanced catabolism of several lipid classes increases prognostic risk while plasma PGF2α may be a marker for reduced prognostic risk in AML.
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Key Words
- 12-HEPE, 12-hydroxy-5Z,8Z,10E,14Z,17Z-eicosapentaenoic acid
- 12-LOX, 12-lipoxygenase
- 2HG, (R)-2-hydroxyglutarate
- 2OG, 2-oxoglutarate
- 8,9-DHET, 8,9-dihydroxy-5Z,11Z,14Z-eicosatrienoic acid
- AA, arachidonic acid
- ALL, acute lymphoblastic leukemia
- AML, acute myeloid leukemia
- Acute myeloid leukemia
- Blast cell number
- CE, cholesterol ester
- CML, chronic myelogenous leukemia
- CPT1a, carnitine palmitate transferase 1a
- Cer, ceramide
- CoQ10, coenzyme Q10
- DG, diacylglycerol
- DGLA, dihomo-γ-linoleic acid
- DIC, disseminated intravascular coagulation
- EPA, eicosapentaenoic acid (20:5;5Z,8Z,11Z,14Z,17Z)
- ESI-, electrospray ionization negative mode
- ESI +, electrospray ionization positive mode
- Eicosanoids
- FAA, fatty acid amide
- FAB, French-American-British classification
- FAME, fatty acid methyl ester
- FAO, fatty acid oxidation
- FLC-QqLIT-MS, fast liquid chromatography-quadrupole linear ion-trap mass spectrometry
- Fatty acids
- GCMS, gas chromatography–mass spectrometry
- LPC, lysophosphatidylcholine
- LPE, lysophosphatidylethanolamine
- Lipidomics
- MG, monoacylglycerol
- MRM, multiple reactions monitoring
- MUFA, monounsaturated fatty acid
- OPLS-DA, orthogonal PLS-DA
- PC, phosphatidylcholine
- PCA, principal components analysis
- PE, phosphatidylethanolamine
- PGE2, prostaglandin E2
- PGF1α, prostaglandin 1α
- PGF2α, prostaglandin F2α
- PGH2, prostaglandin H2
- PLS-DA, projection to latent structures-discriminant analysis
- POEA, palmitoleoyl ethanolamide
- PUFA, polyunsaturated fatty acid
- Prognostic risk
- SCD1, stearoyl CoA desaturase 1
- SM, sphingomyelin
- TG, triacylglycerol (triglyceride)
- TxA2, thromboxane A2
- TxB2, thromboxane B2
- UPLC-ESI-QTOFMS, ultraperformance liquid chromatography-electrospray ionization-quadrupole time-of-flight mass spectrometry
- mPGES-1, microsomal prostaglandin E synthase-1
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Affiliation(s)
- Thomas Pabst
- Department of Medical Oncology, Inselspital Bern, Switzerland
| | - Linda Kortz
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Germany
| | - Georg M Fiedler
- Institute of Clinical Chemistry, Inselspital Bern, Switzerland
| | - Uta Ceglarek
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Germany
| | - Jeffrey R Idle
- Hepatology Research Group, Department of Clinical Research, University of Bern, Switzerland
| | - Diren Beyoğlu
- Hepatology Research Group, Department of Clinical Research, University of Bern, Switzerland
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de Oliveira MR, da Costa Ferreira G, Brasil FB, Peres A. Pinocembrin Suppresses H2O2-Induced Mitochondrial Dysfunction by a Mechanism Dependent on the Nrf2/HO-1 Axis in SH-SY5Y Cells. Mol Neurobiol 2017; 55:989-1003. [DOI: 10.1007/s12035-016-0380-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 12/30/2016] [Indexed: 01/23/2023]
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10
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Ozeir M, Pelosi L, Ismail A, Mellot-Draznieks C, Fontecave M, Pierrel F. Coq6 is responsible for the C4-deamination reaction in coenzyme Q biosynthesis in Saccharomyces cerevisiae. J Biol Chem 2015; 290:24140-51. [PMID: 26260787 DOI: 10.1074/jbc.m115.675744] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Indexed: 11/06/2022] Open
Abstract
The yeast Saccharomyces cerevisiae is able to use para-aminobenzoic acid (pABA) in addition to 4-hydroxybenzoic acid as a precursor of coenzyme Q, a redox lipid essential to the function of the mitochondrial respiratory chain. The biosynthesis of coenzyme Q from pABA requires a deamination reaction at position C4 of the benzene ring to substitute the amino group with an hydroxyl group. We show here that the FAD-dependent monooxygenase Coq6, which is known to hydroxylate position C5, also deaminates position C4 in a reaction implicating molecular oxygen, as demonstrated with labeling experiments. We identify mutations in Coq6 that abrogate the C4-deamination activity, whereas preserving the C5-hydroxylation activity. Several results support that the deletion of Coq9 impacts Coq6, thus explaining the C4-deamination defect observed in Δcoq9 cells. The vast majority of flavin monooxygenases catalyze hydroxylation reactions on a single position of their substrate. Coq6 is thus a rare example of a flavin monooxygenase that is able to act on two different carbon atoms of its C4-aminated substrate, allowing its deamination and ultimately its conversion into coenzyme Q by the other proteins constituting the coenzyme Q biosynthetic pathway.
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Affiliation(s)
- Mohammad Ozeir
- From the University of Grenoble Alpes, LCBM, UMR5249, F-38000 Grenoble, France
| | - Ludovic Pelosi
- the University of Grenoble Alpes, LAPM, F-38000 Grenoble, France, the CNRS, LAPM, F-38000 Grenoble, France
| | - Alexandre Ismail
- the Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, UPMC, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and the Sup'Biotech, IONIS Education Group, 66 rue Guy-Moquet, F-94800 Villejuif, France
| | - Caroline Mellot-Draznieks
- the Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, UPMC, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and
| | - Marc Fontecave
- the Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, UPMC, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France, and
| | - Fabien Pierrel
- the University of Grenoble Alpes, LAPM, F-38000 Grenoble, France, the CNRS, LAPM, F-38000 Grenoble, France,
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11
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Morris G, Maes M. Mitochondrial dysfunctions in myalgic encephalomyelitis/chronic fatigue syndrome explained by activated immuno-inflammatory, oxidative and nitrosative stress pathways. Metab Brain Dis 2014; 29:19-36. [PMID: 24557875 DOI: 10.1007/s11011-013-9435-x] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Accepted: 08/22/2013] [Indexed: 02/07/2023]
Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/cfs) is classified by the World Health Organization as a disorder of the central nervous system. ME/cfs is an neuro-immune disorder accompanied by chronic low-grade inflammation, increased levels of oxidative and nitrosative stress (O&NS), O&NS-mediated damage to fatty acids, DNA and proteins, autoimmune reactions directed against neoantigens and brain disorders. Mitochondrial dysfunctions have been found in ME/cfs, e.g. lowered ATP production, impaired oxidative phosphorylation and mitochondrial damage. This paper reviews the pathways that may explain mitochondrial dysfunctions in ME/cfs. Increased levels of pro-inflammatory cytokines, such as interleukin-1 and tumor necrosis factor-α, and elastase, and increased O&NS may inhibit mitochondrial respiration, decrease the activities of the electron transport chain and mitochondrial membrane potential, increase mitochondrial membrane permeability, interfere with ATP production and cause mitochondrial shutdown. The activated O&NS pathways may additionally lead to damage of mitochondrial DNA and membranes thus decreasing membrane fluidity. Lowered levels of antioxidants, zinc and coenzyme Q10, and ω3 polyunsaturated fatty acids in ME/cfs may further aggravate the activated immuno-inflammatory and O&NS pathways. Therefore, it may be concluded that immuno-inflammatory and O&NS pathways may play a role in the mitochondrial dysfunctions and consequently the bioenergetic abnormalities seen in patients with ME/cfs. Defects in ATP production and the electron transport complex, in turn, are associated with an elevated production of superoxide and hydrogen peroxide in mitochondria creating adaptive and synergistic damage. It is argued that mitochondrial dysfunctions, e.g. lowered ATP production, may play a role in the onset of ME/cfs symptoms, e.g. fatigue and post exertional malaise, and may explain in part the central metabolic abnormalities observed in ME/cfs, e.g. glucose hypometabolism and cerebral hypoperfusion.
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12
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Coenzyme Q10 depletion in medical and neuropsychiatric disorders: potential repercussions and therapeutic implications. Mol Neurobiol 2013; 48:883-903. [PMID: 23761046 DOI: 10.1007/s12035-013-8477-8] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Accepted: 05/29/2013] [Indexed: 12/18/2022]
Abstract
Coenzyme Q10 (CoQ10) is an antioxidant, a membrane stabilizer, and a vital cofactor in the mitochondrial electron transport chain, enabling the generation of adenosine triphosphate. It additionally regulates gene expression and apoptosis; is an essential cofactor of uncoupling proteins; and has anti-inflammatory, redox modulatory, and neuroprotective effects. This paper reviews the known physiological role of CoQ10 in cellular metabolism, cell death, differentiation and gene regulation, and examines the potential repercussions of CoQ10 depletion including its role in illnesses such as Parkinson's disease, depression, myalgic encephalomyelitis/chronic fatigue syndrome, and fibromyalgia. CoQ10 depletion may play a role in the pathophysiology of these disorders by modulating cellular processes including hydrogen peroxide formation, gene regulation, cytoprotection, bioenegetic performance, and regulation of cellular metabolism. CoQ10 treatment improves quality of life in patients with Parkinson's disease and may play a role in delaying the progression of that disorder. Administration of CoQ10 has antidepressive effects. CoQ10 treatment significantly reduces fatigue and improves ergonomic performance during exercise and thus may have potential in alleviating the exercise intolerance and exhaustion displayed by people with myalgic encepholamyletis/chronic fatigue syndrome. Administration of CoQ10 improves hyperalgesia and quality of life in patients with fibromyalgia. The evidence base for the effectiveness of treatment with CoQ10 may be explained via its ability to ameliorate oxidative stress and protect mitochondria.
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13
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Duberley KEC, Abramov AY, Chalasani A, Heales SJ, Rahman S, Hargreaves IP. Human neuronal coenzyme Q10 deficiency results in global loss of mitochondrial respiratory chain activity, increased mitochondrial oxidative stress and reversal of ATP synthase activity: implications for pathogenesis and treatment. J Inherit Metab Dis 2013; 36:63-73. [PMID: 22767283 DOI: 10.1007/s10545-012-9511-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 06/11/2012] [Accepted: 06/14/2012] [Indexed: 01/13/2023]
Abstract
Disorders of coenzyme Q(10) (CoQ(10)) biosynthesis represent the most treatable subgroup of mitochondrial diseases. Neurological involvement is frequently observed in CoQ(10) deficiency, typically presenting as cerebellar ataxia and/or seizures. The aetiology of the neurological presentation of CoQ(10) deficiency has yet to be fully elucidated and therefore in order to investigate these phenomena we have established a neuronal cell model of CoQ(10) deficiency by treatment of neuronal SH-SY5Y cell line with para-aminobenzoic acid (PABA). PABA is a competitive inhibitor of the CoQ(10) biosynthetic pathway enzyme, COQ2. PABA treatment (1 mM) resulted in a 54 % decrease (46 % residual CoQ(10)) decrease in neuronal CoQ(10) status (p < 0.01). Reduction of neuronal CoQ(10) status was accompanied by a progressive decrease in mitochondrial respiratory chain enzyme activities, with a 67.5 % decrease in cellular ATP production at 46 % residual CoQ(10). Mitochondrial oxidative stress increased four-fold at 77 % and 46 % residual CoQ(10). A 40 % increase in mitochondrial membrane potential was detected at 46 % residual CoQ(10) with depolarisation following oligomycin treatment suggesting a reversal of complex V activity. This neuronal cell model provides insights into the effects of CoQ(10) deficiency on neuronal mitochondrial function and oxidative stress, and will be an important tool to evaluate candidate therapies for neurological conditions associated with CoQ(10) deficiency.
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Affiliation(s)
- Kate E C Duberley
- Department of Molecular Neuroscience, UCL Institute of Neurology and Neurometabolic Unit, National Hospital for Neurology, Queen Square, London WC1N 3BG, UK.
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Effects of inhibiting CoQ10 biosynthesis with 4-nitrobenzoate in human fibroblasts. PLoS One 2012; 7:e30606. [PMID: 22359546 PMCID: PMC3281033 DOI: 10.1371/journal.pone.0030606] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 12/24/2011] [Indexed: 11/19/2022] Open
Abstract
Coenzyme Q10 (CoQ10) is a potent lipophilic antioxidant in cell membranes and a carrier of electrons in the mitochondrial respiratory chain. We previously characterized the effects of varying severities of CoQ10 deficiency on ROS production and mitochondrial bioenergetics in cells harboring genetic defects of CoQ10 biosynthesis. We observed a unimodal distribution of ROS production with CoQ10 deficiency: cells with <20% of CoQ10 and 50–70% of CoQ10 did not generate excess ROS while cells with 30–45% of CoQ10 showed increased ROS production and lipid peroxidation. Because our previous studies were limited to a small number of mutant cell lines with heterogeneous molecular defects, here, we treated 5 control and 2 mildly CoQ10 deficient fibroblasts with varying doses of 4-nitrobenzoate (4-NB), an analog of 4-hydroxybenzoate (4-HB) and inhibitor of 4-para-hydroxybenzoate:polyprenyl transferase (COQ2) to induce a range of CoQ10 deficiencies. Our results support the concept that the degree of CoQ10 deficiency in cells dictates the extent of ATP synthesis defects and ROS production and that 40–50% residual CoQ10 produces maximal oxidative stress and cell death.
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Parrado C, López-Lluch G, Rodríguez-Bies E, Santa-Cruz S, Navas P, Ramsey JJ, Villalba JM. Calorie restriction modifies ubiquinone and COQ transcript levels in mouse tissues. Free Radic Biol Med 2011; 50:1728-36. [PMID: 21447381 PMCID: PMC3096745 DOI: 10.1016/j.freeradbiomed.2011.03.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 03/04/2011] [Accepted: 03/22/2011] [Indexed: 12/22/2022]
Abstract
We studied ubiquinone (Q), Q homologue ratio, and steady-state levels of mCOQ transcripts in tissues from mice fed ad libitum or under calorie restriction. Maximum ubiquinone levels on a protein basis were found in kidney and heart, followed by liver, brain, and skeletal muscle. Liver and skeletal muscle showed the highest Q(9)/Q(10) ratios with significant interindividual variability. Heart, kidney, and particularly brain exhibited lower Q(9)/Q(10) ratios and interindividual variability. In skeletal muscle and heart, the most abundant mCOQ transcript was mCOQ7, followed by mCOQ8, mCOQ2, mPDSS2, mPDSS1, and mCOQ3. In nonmuscular tissues (liver, kidney, and brain) the most abundant mCOQ transcript was mCOQ2, followed by mCOQ7, mCOQ8, mPDSS1, mPDSS2, and mCOQ3. Calorie restriction increased both ubiquinone homologues and mPDSS2 mRNA in skeletal muscle, but mCOQ7 was decreased. In contrast, Q(9) and most mCOQ transcripts were decreased in heart. Calorie restriction also modified the Q(9)/Q(10) ratio, which was increased in kidney and decreased in heart without alterations in mPDSS1 or mPDSS2 transcripts. We demonstrate for the first time that unique patterns of mCOQ transcripts exist in muscular and nonmuscular tissues and that Q and COQ genes are targets of calorie restriction in a tissue-specific way.
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Affiliation(s)
- Cristina Parrado
- Departamento de Biología Celular, Fisiología e Inmunología, Facultad de Ciencias, Universidad de Córdoba, E-14014, Córdoba, Spain
- Centro Andaluz de Biología del Desarrollo,Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, E-41013, Sevilla, Spain
| | - Guillermo López-Lluch
- Centro Andaluz de Biología del Desarrollo,Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, E-41013, Sevilla, Spain
| | - Elisabet Rodríguez-Bies
- Centro Andaluz de Biología del Desarrollo,Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, E-41013, Sevilla, Spain
| | - Sara Santa-Cruz
- Centro Andaluz de Biología del Desarrollo,Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, E-41013, Sevilla, Spain
| | - Plácido Navas
- Centro Andaluz de Biología del Desarrollo,Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, E-41013, Sevilla, Spain
| | - Jon J. Ramsey
- VM Molecular Biosciences, University of California, Davis, CA 95616 USA
| | - José M. Villalba
- Departamento de Biología Celular, Fisiología e Inmunología, Facultad de Ciencias, Universidad de Córdoba, E-14014, Córdoba, Spain
- Correspondence to: Departamento de Biología Celular, Fisiología e Inmunología Facultad de Ciencias, Universidad de Córdoba; Campus Rabanales, Edificio Severo Ochoa, 3a planta; 14014 Córdoba, Spain; Phone: +34-957-218595; Fax: +34-957-218634;
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Nierobisz LS, McFarland DC, Mozdziak PE. MitoQ10 induces adipogenesis and oxidative metabolism in myotube cultures. Comp Biochem Physiol B Biochem Mol Biol 2011; 158:125-31. [DOI: 10.1016/j.cbpb.2010.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Revised: 10/07/2010] [Accepted: 10/08/2010] [Indexed: 12/25/2022]
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Quinzii CM, López LC, Von-Moltke J, Naini A, Krishna S, Schuelke M, Salviati L, Navas P, DiMauro S, Hirano M. Respiratory chain dysfunction and oxidative stress correlate with severity of primary CoQ10 deficiency. FASEB J 2008; 22:1874-85. [PMID: 18230681 DOI: 10.1096/fj.07-100149] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Coenzyme Q(10) (CoQ(10)) is essential for electron transport in the mitochondrial respiratory chain and antioxidant defense. Last year, we reported the first mutations in CoQ(10) biosynthetic genes, COQ2, which encodes 4-parahydroxybenzoate: polyprenyl transferase; and PDSS2, which encodes subunit 2 of decaprenyl diphosphate synthase. However, the pathogenic mechanisms of primary CoQ(10) deficiency have not been well characterized. In this study, we investigated the consequence of severe CoQ(10) deficiency on bioenergetics, oxidative stress, and antioxidant defenses in cultured skin fibroblasts harboring COQ2 and PDSS2 mutations. Defects in the first two committed steps of the CoQ(10) biosynthetic pathway produce different biochemical alterations. PDSS2 mutant fibroblasts have 12% CoQ(10) relative to control cells and markedly reduced ATP synthesis, but do not show increased reactive oxygen species (ROS) production, signs of oxidative stress, or increased antioxidant defense markers. In contrast, COQ2 mutant fibroblasts have 30% CoQ(10) with partial defect in ATP synthesis, as well as significantly increased ROS production and oxidation of lipids and proteins. On the basis of a small number of cell lines, our results suggest that primary CoQ(10) deficiencies cause variable defects of ATP synthesis and oxidative stress, which may explain the different clinical features and may lead to more rational therapeutic strategies.
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Affiliation(s)
- Catarina M Quinzii
- Department of Neurology, Columbia University Medical Center, New York, New York 10032, USA
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Navas P, Villalba JM, de Cabo R. The importance of plasma membrane coenzyme Q in aging and stress responses. Mitochondrion 2007; 7 Suppl:S34-40. [PMID: 17482527 DOI: 10.1016/j.mito.2007.02.010] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Revised: 01/26/2007] [Accepted: 02/03/2007] [Indexed: 02/02/2023]
Abstract
The plasma membrane of eukaryotic cells is the limit to interact with the environment. This position implies receiving stress signals that affects its components such as phospholipids. Inserted inside these components is coenzyme Q that is a redox compound acting as antioxidant. Coenzyme Q is reduced by diverse dehydrogenase enzymes mainly NADH-cytochrome b(5) reductase and NAD(P)H:quinone reductase 1. Reduced coenzyme Q can prevent lipid peroxidation chain reaction by itself or by reducing other antioxidants such as alpha-tocopherol and ascorbate. The group formed by antioxidants and the enzymes able to reduce coenzyme Q constitutes a plasma membrane redox system that is regulated by conditions that induce oxidative stress. Growth factor removal, ethidium bromide-induced rho degrees cells, and vitamin E deficiency are some of the conditions where both coenzyme Q and its reductases are increased in the plasma membrane. This antioxidant system in the plasma membrane has been observed to participate in the healthy aging induced by calorie restriction. Furthermore, coenzyme Q regulates the release of ceramide from sphingomyelin, which is concentrated in the plasma membrane. This results from the non-competitive inhibition of the neutral sphingomyelinase by coenzyme Q particularly by its reduced form. Coenzyme Q in the plasma membrane is then the center of a complex antioxidant system preventing the accumulation of oxidative damage and regulating the externally initiated ceramide signaling pathway.
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Affiliation(s)
- Plácido Navas
- Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide-CSIC, 41013 Sevilla, Spain.
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