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Kappler L, Hoene M, Hu C, von Toerne C, Li J, Bleher D, Hoffmann C, Böhm A, Kollipara L, Zischka H, Königsrainer A, Häring HU, Peter A, Xu G, Sickmann A, Hauck SM, Weigert C, Lehmann R. Linking bioenergetic function of mitochondria to tissue-specific molecular fingerprints. Am J Physiol Endocrinol Metab 2019; 317:E374-E387. [PMID: 31211616 DOI: 10.1152/ajpendo.00088.2019] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mitochondria are dynamic organelles with diverse functions in tissues such as liver and skeletal muscle. To unravel the mitochondrial contribution to tissue-specific physiology, we performed a systematic comparison of the mitochondrial proteome and lipidome of mice and assessed the consequences hereof for respiration. Liver and skeletal muscle mitochondrial protein composition was studied by data-independent ultra-high-performance (UHP)LC-MS/MS-proteomics, and lipid profiles were compared by UHPLC-MS/MS lipidomics. Mitochondrial function was investigated by high-resolution respirometry in samples from mice and humans. Enzymes of pyruvate oxidation as well as several subunits of complex I, III, and ATP synthase were more abundant in muscle mitochondria. Muscle mitochondria were enriched in cardiolipins associated with higher oxidative phosphorylation capacity and flexibility, in particular CL(18:2)4 and 22:6-containing cardiolipins. In contrast, protein equipment of liver mitochondria indicated a shuttling of complex I substrates toward gluconeogenesis and ketogenesis and a higher preference for electron transfer via the flavoprotein quinone oxidoreductase pathway. Concordantly, muscle and liver mitochondria showed distinct respiratory substrate preferences. Muscle respired significantly more on the complex I substrates pyruvate and glutamate, whereas in liver maximal respiration was supported by complex II substrate succinate. This was a consistent finding in mouse liver and skeletal muscle mitochondria and human samples. Muscle mitochondria are tailored to produce ATP with a high capacity for complex I-linked substrates. Liver mitochondria are more connected to biosynthetic pathways, preferring fatty acids and succinate for oxidation. The physiologic diversity of mitochondria may help to understand tissue-specific disease pathologies and to develop therapies targeting mitochondrial function.
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Affiliation(s)
- Lisa Kappler
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Miriam Hoene
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Chunxiu Hu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | | | - Jia Li
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Daniel Bleher
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Christoph Hoffmann
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Anja Böhm
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
- German Center for Diabetes Research, Tuebingen, Germany
| | | | - Hans Zischka
- Institute of Molecular Toxicology and Pharmacology, Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Neuherberg, Germany
- Institute of Toxicology and Environmental Hygiene, Technical University Munich, Munich, Germany
| | - Alfred Königsrainer
- Department of General, Visceral and Transplant Surgery, University Hospital Tuebingen, Tuebingen, Germany
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Partner Site, Tuebingen, Germany
| | - Hans-Ulrich Häring
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
- German Center for Diabetes Research, Tuebingen, Germany
| | - Andreas Peter
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
- German Center for Diabetes Research, Tuebingen, Germany
| | - Guowang Xu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften - ISAS, Dortmund, Germany
- Medizinisches Proteom-Center, Ruhr-University Bochum, Bochum, Germany
- Department of Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Center Munich, Munich, Germany
- German Center for Diabetes Research, Tuebingen, Germany
| | - Cora Weigert
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
- German Center for Diabetes Research, Tuebingen, Germany
| | - Rainer Lehmann
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen, Tuebingen, Germany
- German Center for Diabetes Research, Tuebingen, Germany
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52
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Yang W, Liu W, Wen C, Hu B, Jian S, Gang Y. A superoxide dismutase (MnSOD) with identification and functional characterization from the freshwater mussel Cristaria plicata. FISH & SHELLFISH IMMUNOLOGY 2019; 91:180-187. [PMID: 31078645 DOI: 10.1016/j.fsi.2019.04.307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/25/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Manganese superoxide dismutase (MnSOD) is a sort of important metalloenzyme that can catalyze ROS in the organisms. In this study, MnSOD cDNA of C. plicata, designated as CpMnSOD (accession no. MK465057), was cloned from hemocytes. The full-length cDNA of MnSOD was 1096 bp with a 672 bp open reading frame encoding 223 amino acids. The deduced amino acid sequence contained a mitochondrial-targeting sequence (MTS) of 18 amino acids in the N-terminus, and four conserved amino acids for manganese binding (H49, H97, D182, H186). CpMnSOD showed a high level (65-73%) of sequence similarity to MnSODs from other species. The results of Real-time quantitative PCR revealed that CpMnSOD mRNA constitutively expressed in tissues. The highest expression level was in hepatopancreas, followed by muscle, mantle and gill, and the lowest expression level was in hemocytes. After microcystin challenge, the expression levels of CpMnSOD mRNA were up-regulated in hemocytes and hepatopancreas. The cDNA of CpMnSOD was cloned into the plasmid pColdI-ZZ, and the recombinant protein was expressed in Escherichia coli BL21 (DE3). The enzyme stability assay showed that the purified CpMnSOD protein maintained more than 80% enzyme activity at temperature up to 70 °C, at pH 2.0-10.0, and resistant to 8 mol/L urea or 8% SDS.
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Affiliation(s)
- Wanying Yang
- College of Life Science, Education Ministry Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Nanchang, 330031, China
| | - Wenxiu Liu
- College of Life Science, Education Ministry Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Nanchang, 330031, China
| | - Chungen Wen
- College of Life Science, Education Ministry Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Nanchang, 330031, China.
| | - Baoqing Hu
- College of Life Science, Education Ministry Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Nanchang, 330031, China.
| | - Shaoqing Jian
- College of Life Science, Education Ministry Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Nanchang, 330031, China
| | - Yang Gang
- College of Life Science, Education Ministry Key Laboratory of Poyang Lake Environment and Resource Utilization, Nanchang University, Nanchang, 330031, China
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53
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Faller KME, Atzler D, McAndrew DJ, Zervou S, Whittington HJ, Simon JN, Aksentijevic D, Ten Hove M, Choe CU, Isbrandt D, Casadei B, Schneider JE, Neubauer S, Lygate CA. Impaired cardiac contractile function in arginine:glycine amidinotransferase knockout mice devoid of creatine is rescued by homoarginine but not creatine. Cardiovasc Res 2019; 114:417-430. [PMID: 29236952 PMCID: PMC5982714 DOI: 10.1093/cvr/cvx242] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 12/08/2017] [Indexed: 01/09/2023] Open
Abstract
Aims Creatine buffers cellular adenosine triphosphate (ATP) via the creatine kinase reaction. Creatine levels are reduced in heart failure, but their contribution to pathophysiology is unclear. Arginine:glycine amidinotransferase (AGAT) in the kidney catalyses both the first step in creatine biosynthesis as well as homoarginine (HA) synthesis. AGAT-/- mice fed a creatine-free diet have a whole body creatine-deficiency. We hypothesized that AGAT-/- mice would develop cardiac dysfunction and rescue by dietary creatine would imply causality. Methods and results Withdrawal of dietary creatine in AGAT-/- mice provided an estimate of myocardial creatine efflux of ∼2.7%/day; however, in vivo cardiac function was maintained despite low levels of myocardial creatine. Using AGAT-/- mice naïve to dietary creatine we confirmed absence of phosphocreatine in the heart, but crucially, ATP levels were unchanged. Potential compensatory adaptations were absent, AMPK was not activated and respiration in isolated mitochondria was normal. AGAT-/- mice had rescuable changes in body water and organ weights suggesting a role for creatine as a compatible osmolyte. Creatine-naïve AGAT-/- mice had haemodynamic impairment with low LV systolic pressure and reduced inotropy, lusitropy, and contractile reserve. Creatine supplementation only corrected systolic pressure despite normalization of myocardial creatine. AGAT-/- mice had low plasma HA and supplementation completely rescued all other haemodynamic parameters. Contractile dysfunction in AGAT-/- was confirmed in Langendorff perfused hearts and in creatine-replete isolated cardiomyocytes, indicating that HA is necessary for normal cardiac function. Conclusions Our findings argue against low myocardial creatine per se as a major contributor to cardiac dysfunction. Conversely, we show that HA deficiency can impair cardiac function, which may explain why low HA is an independent risk factor for multiple cardiovascular diseases.
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Affiliation(s)
- Kiterie M E Faller
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Dorothee Atzler
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK.,German Centre for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, Institute for Cardiovascular Prevention (IPEK), Pettenkoferstraße 8a & 9, 80336 Munich, Germany.,Walther-Straub Institute of Pharmacology and Toxicology, Ludwig Maximilians University, Goethestrasse 33, 80336 Munich, Germany
| | - Debra J McAndrew
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Sevasti Zervou
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Hannah J Whittington
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Jillian N Simon
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Dunja Aksentijevic
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Michiel Ten Hove
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Chi-Un Choe
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Dirk Isbrandt
- Experimental Neurophysiology, German Center for Neurodegenerative Diseases (DZNE), 53175 Bonn, Germany.,The Institute for Molecular and Behavioral Neuroscience, University of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
| | - Barbara Casadei
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Jurgen E Schneider
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK.,Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Stefan Neubauer
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Craig A Lygate
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, BHF Centre of Research Excellence at the University of Oxford and the Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford OX3 7BN, UK
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54
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Zhao Q, Sun Q, Zhou L, Liu K, Jiao K. Complex Regulation of Mitochondrial Function During Cardiac Development. J Am Heart Assoc 2019; 8:e012731. [PMID: 31215339 PMCID: PMC6662350 DOI: 10.1161/jaha.119.012731] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 05/24/2019] [Indexed: 02/07/2023]
Affiliation(s)
- Qiancong Zhao
- Department of Cardiovascular SurgeryThe Second Hospital of Jilin UniversityChangchunChina
- Department of GeneticsThe University of Alabama at BirminghamAL
| | - Qianchuang Sun
- Department of AnesthesiologyThe Second Hospital of Jilin UniversityChangchunChina
- Department of GeneticsThe University of Alabama at BirminghamAL
| | - Lufang Zhou
- Department of MedicineThe University of Alabama at BirminghamAL
| | - Kexiang Liu
- Department of Cardiovascular SurgeryThe Second Hospital of Jilin UniversityChangchunChina
| | - Kai Jiao
- Department of GeneticsThe University of Alabama at BirminghamAL
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55
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Mitochondria and the Brain: Bioenergetics and Beyond. Neurotox Res 2019; 36:219-238. [DOI: 10.1007/s12640-019-00061-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 05/06/2019] [Indexed: 12/20/2022]
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56
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Cai M, Yang Q, Li G, Sun S, Chen Y, Tian L, Dong H. Activation of cannabinoid receptor 1 is involved in protection against mitochondrial dysfunction and cerebral ischaemic tolerance induced by isoflurane preconditioning. Br J Anaesth 2019; 119:1213-1223. [PMID: 29045576 DOI: 10.1093/bja/aex267] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2017] [Indexed: 12/13/2022] Open
Abstract
Background Isoflurane preconditioning (IPC) induces cerebral ischaemic tolerance, but the mechanism remains poorly understood. The aim of this study was to determine changes in mitochondrial function in the brain after IPC, and whether the cannabinoid receptor 1 (CB1R) could be involved in the mechanism of mitochondrial protection mediated by IPC. Methods Adult male Sprague-Dawley rats were pretreated with isoflurane 2% for 1 h day -1 , for 5 days consecutively, and then subjected to 120 min right middle cerebral artery occlusion. Cannabinoid receptor 1 expression in the cellular and mitochondrial membrane was measured. The CB1R agonist HU-210 was administered alone, or the antagonists AM251 and SR141716A were given to the animals before each preconditioning. Neurological scores, infarct volume, apoptosis, and mitochondrial function were examined after middle cerebral artery occlusion. Results Expression of CB1R on cellular and mitochondrial membranes was increased 6 h after preconditioning. Both IPC and HU-210 administration before middle cerebral artery occlusion improved neurological outcomes and reduced infarct volume. Isoflurane preconditioning increased the expression of the anti-apoptotic proteins Bcl-2 and Bcl-X L and reduced apoptosis in neurones. Isoflurane preconditioning and HU-210 also markedly preserved the activity of respiratory chain complexes, reduced mitochondrial radical generation, preserved mitochondrial membrane potential, and inhibited mitochondrial permeability transition pore opening. Cannabinoid receptor 1 antagonists abolished the improvement in mitochondrial function and the neuroprotective effects induced by IPC. Conclusions Our results indicate that IPC elicits brain ischaemic tolerance and mitochondrial protection by activating the CB1R, which provides a new mechanism for IPC-induced neuroprotection against cerebral ischaemia.
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Affiliation(s)
- M Cai
- Department of Anaesthesiology and Perioperative Medicine.,Department of Psychiatry, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Q Yang
- Department of Anaesthesiology and Perioperative Medicine
| | - G Li
- Department of Anaesthesiology and Perioperative Medicine
| | - S Sun
- Department of Anaesthesiology and Perioperative Medicine
| | - Y Chen
- Department of Anaesthesiology and Perioperative Medicine
| | - L Tian
- Department of Anaesthesiology and Perioperative Medicine
| | - H Dong
- Department of Anaesthesiology and Perioperative Medicine
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57
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Valdecantos MP, Pérez-Matute P, Prieto-Hontoria P, Moreno-Aliaga MJ, Martínez JA. Impact of dietary lipoic acid supplementation on liver mitochondrial bioenergetics and oxidative status on normally fed Wistar rats. Int J Food Sci Nutr 2019; 70:834-844. [PMID: 30764676 DOI: 10.1080/09637486.2019.1572716] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The aim of this study was to examine the effects of α-lipoic acid (α-LA) on liver mitochondrial bioenergetics and oxidative status for 8 weeks in normal-healthy animals. A pair-fed group was included to differentiate between α-LA direct effects and those changes due to reduced food intake. α-LA decreased body weight gain, liver weight and insulin levels with no differences compared to its pair-fed group. α-LA significantly reduced energy efficiency, the activity of the electron transport chain complexes and induced a lower efficiency of oxidative phosphorylation with reduced ATP production. α-LA supplementation directly decreased plasma triglycerides (TGs), free fatty acids and ketone bodies levels. A significant reduction in hepatic TG content was also observed. A significant up-regulation of Cpt1a, Acadl and Sirt3, all β-oxidation genes, along with a significant deacetylation of the forkhead transcription factor 3a (FOXO3A) was found in α-LA-treated animals. Thus, α-LA along with a standard chow diet has direct actions on lipid metabolism and liver by modulating mitochondrial function in normal-weight rats. These results should be taken into account when α-LA is administered or recommended to a healthy population.
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Affiliation(s)
- M P Valdecantos
- Instituto de Investigaciones Biomédicas Alberto Sols (Centro Mixto CSIC-UAM) , Madrid , Spain.,Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERdem), Instituto de Salud Carlos III , Madrid , Spain.,Department of Nutrition, Food Science and Physiology, University of Navarra , Pamplona , Spain
| | - P Pérez-Matute
- Department of Nutrition, Food Science and Physiology, University of Navarra , Pamplona , Spain.,Department of Infectious Diseases, Infectious Diseases, Microbiota and Metabolism Unit, Center for Biomedical Research of La Rioja (CIBIR) , Logroño, Spain
| | - P Prieto-Hontoria
- Department of Nutrition, Food Science and Physiology, University of Navarra , Pamplona , Spain
| | - M J Moreno-Aliaga
- Department of Nutrition, Food Science and Physiology, University of Navarra , Pamplona , Spain.,Centre for Nutrition Research, University of Navarra , Pamplona , Spain.,CIBER Fisiopatología de la Obesidad y la Nutrición (CIBERobn) , Madrid , Spain.,IdiSNA, Navarra's Health Research Institute , Pamplona , Spain
| | - J A Martínez
- Department of Nutrition, Food Science and Physiology, University of Navarra , Pamplona , Spain.,Centre for Nutrition Research, University of Navarra , Pamplona , Spain.,CIBER Fisiopatología de la Obesidad y la Nutrición (CIBERobn) , Madrid , Spain.,IdiSNA, Navarra's Health Research Institute , Pamplona , Spain.,IMDEA Food Institute, CEI UAM + CSIC , Madrid , Spain
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58
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High-resolution respirometry in human endomyocardial biopsies shows reduced ventricular oxidative capacity related to heart failure. Exp Mol Med 2019; 51:1-10. [PMID: 30765687 PMCID: PMC6376010 DOI: 10.1038/s12276-019-0214-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 08/17/2018] [Accepted: 10/01/2018] [Indexed: 02/07/2023] Open
Abstract
The lifetime risk of developing heart failure is approximately 20%, and survival rates remain poor. Myocardial mitochondrial function has been suggested to play a pivotal role in heart failure pathophysiology. Human studies on ex vivo mitochondrial function have mostly been limited to atrial tissue obtained during open heart surgery and have provided contradictory results. This study aimed at measuring myocardial mitochondrial function in transcatheter ventricular endomyocardial biopsies and assessing the relationship between oxidative capacity and heart function. We enrolled 40 heart failure patients undergoing ventricular assist device surgery or heart transplantation (34 males, age 57 ± 11 years, body mass index 26.6 ± 4.8 kg/m2) and 29 heart transplant recipients of comparable age and body mass index with normal left ventricular function undergoing surveillance biopsies (23 males, 57 ± 12 years, body mass index 26.2 ± 4.1 kg/m2). High-resolution respirometry was established in the myocardium to measure oxidative capacity ex vivo. The mitochondrial oxidative capacity was 90% higher in ventricular compared to atrial tissues (n = 11, p < 0.01) of explanted hearts. Respiration rates were comparable in ventricular samples of heart failure patients obtained during open heart surgery by standard tissue preparation or ex vivo endomyocardial biopsy (r = 0.9988, p < 0.0001, n = 8), and the mitochondrial oxidative capacity in samples from these patients remained stable for 8 h when stored in either of two common preservation buffers. The oxidative capacity was 44% lower in heart failure than in transplant recipients (67 ± 3 vs. 97 ± 5 pmol/[s mg], p < 0.0001) and correlated positively with heart function (r = 0.49, p < 0.01). High-resolution respirometry of ventricular tissue is feasible in transcatheter biopsies, facilitating clinical studies on myocardial mitochondrial function in patients not undergoing heart surgery. The capacity of mitochondria in heart muscle cells to use oxygen to produce energy correlates with cardiac function. Julia Szendroedi at Heinrich-Heine University, Düsseldorf, Germany, and colleagues have established a technique to reliably evaluate mitochondrial energy metabolism in patients with or recovering from heart failure. They showed that the mitochondrial oxidative capacity of cells in the lower heart chambers (ventricles) was significantly higher than in the upper heart chambers (atria). Moreover, they found that mitochondrial oxidative capacity was reduced by 44% in heart muscle biopsies from patients with heart failure compared with biopsies from heart transplant recipients with normal ventricular function. Stimulating the respiration rate of mitochondria in ventricular heart cells could be a promising strategy for improving cardiac function.
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59
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Kohoutová M, Dejmek J, Tůma Z, Kuncová J. Variability of mitochondrial respiration in relation to sepsis-induced multiple organ dysfunction. Physiol Res 2019; 67:S577-S592. [PMID: 30607965 DOI: 10.33549/physiolres.934050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Ample experimental evidence suggests that sepsis could interfere with any mitochondrial function; however, the true role of mitochondrial dysfunction in the pathogenesis of sepsis-induced multiple organ dysfunction is still a matter of controversy. This review is primarily focused on mitochondrial oxygen consumption in various animal models of sepsis in relation to human disease and potential sources of variability in experimental results documenting decrease, increase or no change in mitochondrial respiration in various organs and species. To date, at least three possible explanations of sepsis-associated dysfunction of the mitochondrial respiratory system and consequently impaired energy production have been suggested: 1. Mitochondrial dysfunction is secondary to tissue hypoxia. 2. Mitochondria are challenged by various toxins or mediators of inflammation that impair oxygen utilization (cytopathic hypoxia). 3. Compromised mitochondrial respiration could be an active measure of survival strategy resembling stunning or hibernation. To reveal the true role of mitochondria in sepsis, sources of variability of experimental results based on animal species, models of sepsis, organs studied, or analytical approaches should be identified and minimized by the use of appropriate experimental models resembling human sepsis, wider use of larger animal species in preclinical studies, more detailed mapping of interspecies differences and organ-specific features of oxygen utilization in addition to use of complex and standardized protocols evaluating mitochondrial respiration.
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Affiliation(s)
- M Kohoutová
- Institute of Physiology, Faculty of Medicine in Plzeň, Charles University, Plzeň, Czech Republic.
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60
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Vogt S, Irqsusi M, Naraghi H, Sattler A, Ruppert V, Weber P, Rhiel A, Ramzan R. Mitochondrial active and relaxed state respiration after heat shock mRNA response in the heart. J Therm Biol 2019; 80:106-112. [PMID: 30784473 DOI: 10.1016/j.jtherbio.2019.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 01/02/2019] [Accepted: 01/06/2019] [Indexed: 12/11/2022]
Abstract
Induction of Heat Shock Proteins results in cytoprotection. Beneficial effect results from transcription and translational cellular components' involvement that defends metabolism and thus induce ischemic protection of the tissue. Mitochondrial respiration is also involved in stress- induced conditions. It is not a uniform process. Cytochrome c Oxidase (CytOx) representing complex IV of the Electron Transfer Chain (ETC) has a regulatory role for mitochondrial respiratory activity, which is tested in our study after hsp induction. Moreover, protein translation for mitochondrial components was probed by the detection of MT-CO1 for Subunit 1 of CytOx neosynthesis. Wistar rats were subjected to whole-body hyperthermia at 42.0-42.5 °C for 15 min followed by a normothermic recovery period. Heat shock response was monitored time dependent from LV biopsies of all control and heat treated animals with PCR-analysis for hsp 32, 60, 70.1, 70.2, 90 and MT-CO1 expression at 15, 30, 45, 60, 120 and 360 min recovery (n = 5 in each group), respectively. Enzymatic activity of CytOx were evaluated polarographically. High energy phosphates were detected by chromatographic analysis. The mRNA expression of MT-CO1 peaked at 60 min and was accompanied by hsp 32 (r = 0.457; p = 0.037) and hsp 70.2 (r = 0.615; p = 0.003) upregulation. With hsp induction, mitochondrial respiration was increased initially. Enzymatic activity reconciled from active into relaxed status wherein CytOx activity was completely inhibited by ATP. Myocardial ATP content increased from stress induced point i.e. < 1 µmol g-1 protein w/w to finally 1.5 ± 0.53 µmol g-1 protein w/w at 120 min recovery interval. Hyperthermic, myocardial hsp- induction goes along with increased CytOx activity representing an increased "active" mitochondrial respiration. In parallel, de -novo holoenzyme assembly of CytOx begins as shown by MT-CO1 upregulation at 60 min recovery time crossing with a final return to the physiological "relaxed" state and ATP -inhibited respiration.
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Affiliation(s)
- Sebastian Vogt
- Cardiovascular Surgery, Universitätsklinikum Marburg und Giessen GmbH, Germany; Cardiovascular Research Lab, Biochemical Pharmacological Center, Philipps, University Marburg, Germany.
| | - Marc Irqsusi
- Cardiovascular Surgery, Universitätsklinikum Marburg und Giessen GmbH, Germany
| | - Hamid Naraghi
- Cardiovascular Surgery, Universitätsklinikum Marburg und Giessen GmbH, Germany
| | - Alexander Sattler
- Center for Internal Medicine, Cardiology, Universitätsklinikum Marburg und Giessen GmbH, Germany
| | - Volker Ruppert
- Center for Internal Medicine, Cardiology, Universitätsklinikum Marburg und Giessen GmbH, Germany
| | - Petra Weber
- Cardiovascular Surgery, Universitätsklinikum Marburg und Giessen GmbH, Germany; Cardiovascular Research Lab, Biochemical Pharmacological Center, Philipps, University Marburg, Germany
| | - Annika Rhiel
- Cardiovascular Surgery, Universitätsklinikum Marburg und Giessen GmbH, Germany; Cardiovascular Research Lab, Biochemical Pharmacological Center, Philipps, University Marburg, Germany
| | - Rabia Ramzan
- Cardiovascular Surgery, Universitätsklinikum Marburg und Giessen GmbH, Germany; Cardiovascular Research Lab, Biochemical Pharmacological Center, Philipps, University Marburg, Germany
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61
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Sirisena DMKP, Perera NCN, Godahewa GI, Kwon H, Yang H, Nam BH, Lee J. A manganese superoxide dismutase (MnSOD) from red lip mullet, Liza haematocheila: Evaluation of molecular structure, immune response, and antioxidant function. FISH & SHELLFISH IMMUNOLOGY 2019; 84:73-82. [PMID: 30266606 DOI: 10.1016/j.fsi.2018.09.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 09/17/2018] [Accepted: 09/25/2018] [Indexed: 06/08/2023]
Abstract
Manganese superoxide dismutase (MnSOD) is a nuclear-encoded antioxidant metalloenzyme. The main function of this enzyme is to dismutase the toxic superoxide anion (O2-) into less toxic hydrogen peroxide (H2O2) and oxygen (O2). Structural analysis of mullet MnSOD (MuMnSOD) was performed using different bioinformatics tools. Pairwise alignment revealed that the protein sequence matched to that derived from Larimichthys crocea with a 95.2% sequence identity. Phylogenetic tree analysis showed that the MuMnSOD was included in the category of teleosts. Multiple sequence alignment showed that a SOD Fe-N domain, SOD Fe-C domain, and Mn/Fe SOD signature were highly conserved among the other examined MnSOD orthologs. Quantitative real-time PCR showed that the highest MuMnSOD mRNA expression level was in blood cells. The highest expression level of MuMnSOD was observed in response to treatment with both Lactococcus garvieae and lipopolysaccharide (LPS) at 6 h post treatment in the head kidney and blood. Potential ROS-scavenging ability of the purified recombinant protein (rMuMnSOD) was examined by the xanthine oxidase assay (XOD assay). The optimum temperature and pH for XOD activity were found to be 25 °C and pH 7, respectively. Relative XOD activity was significantly increased with the dose of rMuMnSOD, revealing its dose dependency. Activity of rMuMnSOD was inhibited by potassium cyanide (KCN) and N-N'-diethyl-dithiocarbamate (DDC). Moreover, expression of MuMnSOD resulted in considerable growth retardation of both gram-positive and gram-negative bacteria. Results of the current study suggest that MuMnSOD acts as an antioxidant enzyme and participates in the immune response in mullet.
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Affiliation(s)
- D M K P Sirisena
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - N C N Perera
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - G I Godahewa
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Hyukjae Kwon
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Hyerim Yang
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Bo-Hye Nam
- Biotechnology Research Division, National Institute of Fisheries Science, 408-1 Sirang-ri, Gijang-up, Gijang-gun, Busan, 46083, Republic of Korea
| | - Jehee Lee
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea.
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62
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Kappler L, Kollipara L, Lehmann R, Sickmann A. Investigating the Role of Mitochondria in Type 2 Diabetes - Lessons from Lipidomics and Proteomics Studies of Skeletal Muscle and Liver. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1158:143-182. [PMID: 31452140 DOI: 10.1007/978-981-13-8367-0_9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Mitochondrial dysfunction is discussed as a key player in the pathogenesis of type 2 diabetes mellitus (T2Dm), a highly prevalent disease rapidly developing as one of the greatest global health challenges of this century. Data however about the involvement of mitochondria, central hubs in bioenergetic processes, in the disease development are still controversial. Lipid and protein homeostasis are under intense discussion to be crucial for proper mitochondrial function. Consequently proteomics and lipidomics analyses might help to understand how molecular changes in mitochondria translate to alterations in energy transduction as observed in the healthy and metabolic diseases such as T2Dm and other related disorders. Mitochondrial lipids integrated in a tool covering proteomic and functional analyses were up to now rarely investigated, although mitochondrial lipids might provide a possible lynchpin in the understanding of type 2 diabetes development and thereby prevention. In this chapter state-of-the-art analytical strategies, pre-analytical aspects, potential pitfalls as well as current proteomics and lipidomics-based knowledge about the pathophysiological role of mitochondria in the pathogenesis of type 2 diabetes will be discussed.
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Affiliation(s)
- Lisa Kappler
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany
| | - Laxmikanth Kollipara
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany
| | - Rainer Lehmann
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tuebingen, Tuebingen, Germany.,Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Centre Munich at the University of Tuebingen, Tuebingen, Germany.,German Center for Diabetes Research (DZD e.V.), Tuebingen, Germany
| | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., Dortmund, Germany. .,Medical Proteome Centre, Ruhr Universität Bochum, Bochum, Germany. .,Department of Chemistry, College of Physical Sciences, University of Aberdeen, Aberdeen, UK.
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63
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Boncler M, Lukasiak M, Dastych J, Golanski J, Watala C. Differentiated mitochondrial function in mouse 3T3 fibroblasts and human epithelial or endothelial cells in response to chemical exposure. Basic Clin Pharmacol Toxicol 2018; 124:199-210. [PMID: 30137675 DOI: 10.1111/bcpt.13117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 08/21/2018] [Indexed: 12/12/2022]
Abstract
Mouse 3T3 fibroblasts are commonly used for in vitro toxicity testing; however, their sensitivity to stimuli is not well defined. To assess the sensitivity of the 3T3 cell line, the study compared the changes in mitochondrial membrane potential (MMP) occurring after exposure to eight chemicals known to demonstrate pro-apoptotic activity (glycerol, isopropanol, ethanol, paracetamol, propranolol, cobalt chloride, formaldehyde and atropine). Five cell lines were used as follows: mouse 3T3 fibroblasts, human epithelial cells (A549, Caco-2 and HepG2) and human endothelial cells (HMEC-1). Cell sensitivity was assessed based on the total area under and over the dose-response curves (AUOC) in relation to baselines. The 3T3 fibroblasts had the highest AUOC values and were the most sensitive to the action of all the examined chemicals, with the exception of formaldehyde. Significant changes in MMP between the 3T3 cell line and other cells were observed after cell treatment with atropine (A549, Caco-2 or HMEC-1 cells vs 3T3 cells, P < 0.05), propranolol (A549 vs 3T3 cells, P < 0.01; HepG2 vs 3T3 cells, P < 0.05), cobalt chloride (A549 cells vs 3T3 cells, P < 0.01) or ethanol (HMEC-1 vs 3T3, P < 0.05). Formaldehyde appeared the most toxic compound for Caco-2 cells (Caco-2 vs 3T3 cells, P < 0.05). The surface areas (AUOC) calculated for each other chemical and obtained for HepG2, Caco-2, A549 and HMEC-1 did not differ significantly between cell lines. We postulate that mouse 3T3 fibroblasts demonstrate significantly higher relative sensitivity to many agents with toxic potential.
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Affiliation(s)
- Magdalena Boncler
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
| | | | - Jaroslaw Dastych
- Laboratory of Cellular Immunology, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Jacek Golanski
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
| | - Cezary Watala
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
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64
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Mitochondrial NADH redox potential impacts the reactive oxygen species production of reverse Electron transfer through complex I. J Bioenerg Biomembr 2018; 50:367-377. [PMID: 30136168 DOI: 10.1007/s10863-018-9767-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 08/13/2018] [Indexed: 10/28/2022]
Abstract
There is substantial evidence that Reactive Oxygen Species (ROS) play a major part in cell functioning. Although their harmfulness through oxidative stress is well documented, their role in signaling and sensing as an oxidative signal still needs to be investigated. In most cells, the mitochondrial Electron Transport Chain (ETC) is the primary source of ROS. The production of ROS by reverse electron transfer through complex I has been demonstrated both in an experimental context but also in many pathophysiological situations. Therefore, understanding the mechanisms that regulate this ROS production is of great interest to control its harmful effects. We used nigericin, Pi and valinomycin as tools to modulate the pH gradient (∆pH) and the membrane potential (∆Ψ) of the protonmotive force (∆p) in liver and muscle mitochondria to accurately determine how these parameters control the ROS production. We show that a high ∆Ψ is the "sine qua none" condition for ROS production from the reverse electron transfer (RET) through the complex I. However, a high ∆Ψ is not the only condition governing ROS production. Indeed, using tools that modulate the mitochondrial NADH level, we also demonstrate that ROS production is directly related to the mitochondrial redox potential when the membrane potential is almost stable.
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65
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O'Brien KM, Rix AS, Egginton S, Farrell AP, Crockett EL, Schlauch K, Woolsey R, Hoffman M, Merriman S. Cardiac mitochondrial metabolism may contribute to differences in thermal tolerance of red- and white-blooded Antarctic notothenioid fishes. J Exp Biol 2018; 221:jeb177816. [PMID: 29895681 PMCID: PMC6104818 DOI: 10.1242/jeb.177816] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/04/2018] [Indexed: 12/18/2022]
Abstract
Studies in temperate fishes provide evidence that cardiac mitochondrial function and the capacity to fuel cardiac work contribute to thermal tolerance. Here, we tested the hypothesis that decreased cardiac aerobic metabolic capacity contributes to the lower thermal tolerance of the haemoglobinless Antarctic icefish, Chaenocephalus aceratus, compared with that of the red-blooded Antarctic species, Notothenia coriiceps. Maximal activities of citrate synthase (CS) and lactate dehydrogenase (LDH), respiration rates of isolated mitochondria, adenylate levels and changes in mitochondrial protein expression were quantified from hearts of animals held at ambient temperature or exposed to their critical thermal maximum (CTmax). Compared with C. aceratus, activity of CS, ATP concentration and energy charge were higher in hearts of N. coriiceps at ambient temperature and CTmax While state 3 mitochondrial respiration rates were not impaired by exposure to CTmax in either species, state 4 rates, indicative of proton leakage, increased following exposure to CTmax in C. aceratus but not N. coriiceps The interactive effect of temperature and species resulted in an increase in antioxidants and aerobic metabolic enzymes in N. coriiceps but not in C. aceratus Together, our results support the hypothesis that the lower aerobic metabolic capacity of C. aceratus hearts contributes to its low thermal tolerance.
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Affiliation(s)
- Kristin M O'Brien
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - Anna S Rix
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - Stuart Egginton
- School of Biomedical Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Anthony P Farrell
- Department of Zoology, University of British Columbia, Vancouver, BC, Canada, V6T 1Z4
| | | | - Karen Schlauch
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV 89557, USA
| | - Rebekah Woolsey
- Nevada Proteomics Center, University of Nevada, Reno, NV 89557, USA
| | - Megan Hoffman
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - Sean Merriman
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
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66
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Singh K, Sripada L, Lipatova A, Roy M, Prajapati P, Gohel D, Bhatelia K, Chumakov PM, Singh R. NLRX1 resides in mitochondrial RNA granules and regulates mitochondrial RNA processing and bioenergetic adaptation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1865:1260-1276. [PMID: 29932989 DOI: 10.1016/j.bbamcr.2018.06.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/10/2018] [Accepted: 06/17/2018] [Indexed: 12/26/2022]
Abstract
The role of mitochondria is emerging in regulation of innate immunity, inflammation and cell death beyond its primary role in energy metabolism. Mitochondria act as molecular platform for immune adaptor protein complexes, which participate in innate immune signaling. The mitochondrial localized immune adaptors are widely expressed in non-immune cells, however their role in regulation of mitochondrial function and metabolic adaption is not well understood. NLRX1, a member of NOD family receptor proteins, localizes to mitochondria and is a negative regulator of anti-viral signaling. However, the submitochondrial localization of NLRX1 and its implication in regulation of mitochondrial functions remains elusive. Here, we confirm that NLRX1 translocates to mitochondrial matrix and associates with mitochondrial FASTKD5 (Fas-activated serine-threonine kinase family protein-5), a bonafide component of mitochondrial RNA granules (MRGs). The association of NLRX1 with FASTKD5 negatively regulates the processing of mitochondrial genome encoded transcripts for key components of complex-I and complex-IV, to modulate its activity and supercomplexes formation. The evidences, here, suggest an important role of NLRX1 in regulating the post-transcriptional processing of mitochondrial RNA, which may have an important implication in bioenergetic adaptation during metabolic stress, oncogenic transformation and innate immunity.
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Affiliation(s)
- Kritarth Singh
- Department of Biochemistry, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, Gujarat, India
| | - Lakshmi Sripada
- Department of Biochemistry, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, Gujarat, India
| | - Anastasia Lipatova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street 32, 119991 Moscow, Russia
| | - Milton Roy
- Department of Biochemistry, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, Gujarat, India
| | - Paresh Prajapati
- SCoBIRC Department of Neuroscience, University of Kentucky, 741S.Limestone, BBSRB, Lexington, KY 40536, USA
| | - Dhruv Gohel
- Department of Biochemistry, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, Gujarat, India
| | - Khyati Bhatelia
- Department of Biochemistry, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, Gujarat, India
| | - Peter M Chumakov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street 32, 119991 Moscow, Russia; Chumakov Institute of Poliomyelitis and Viral Encephalitides, Federal Scientific Center on Research and Development of Immunobiology Products, Russian Academy of Sciences, 142782 Moscow, Russia
| | - Rajesh Singh
- Department of Biochemistry, Faculty of Science, The M.S. University of Baroda, Vadodara, 390002, Gujarat, India.
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67
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Cecatto C, Wajner A, Vargas CR, Wajner SM, Amaral AU, Wajner M. High vulnerability of the heart and liver to 3-hydroxypalmitic acid-induced disruption of mitochondrial functions in intact cell systems. J Cell Biochem 2018; 119:7678-7686. [PMID: 29923625 DOI: 10.1002/jcb.27115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/04/2018] [Indexed: 12/31/2022]
Abstract
Patients affected by long-chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency predominantly present severe liver and cardiac dysfunction, as well as neurological symptoms during metabolic crises, whose pathogenesis is still poorly known. In this study, we demonstrate for the first time that pathological concentrations of 3-hydroxypalmitic acid (3HPA), the long-chain hydroxyl fatty acid (LCHFA) that most accumulates in LCHAD deficiency, significantly decreased adenosine triphosphate-linked and uncoupled mitochondrial respiration in intact cell systems consisting of heart fibers, cardiomyocytes, and hepatocytes, but less intense in diced forebrain. 3HPA also significantly reduced mitochondrial Ca2+ retention capacity and membrane potential in Ca2+ -loaded mitochondria more markedly in the heart and the liver, with mild or no effects in the brain, supporting a higher susceptibility of the heart and the liver to the toxic effects of this fatty acid. It is postulated that disruption of mitochondrial energy and Ca2+ homeostasis caused by the accumulation of LCHFA may contribute toward the severe cardiac and hepatic clinical manifestations observed in the affected patients.
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Affiliation(s)
- Cristiane Cecatto
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Alessandro Wajner
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carmen Regla Vargas
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Simone Magagnin Wajner
- Departamento de Medicina Interna, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Alexandre Umpierrez Amaral
- Departamento de Ciências Biológicas, Universidade Regional Integrada do Alto Uruguai e das Missões, Erechim, Brazil
| | - Moacir Wajner
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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68
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Dard L, Bellance N, Lacombe D, Rossignol R. RAS signalling in energy metabolism and rare human diseases. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1859:845-867. [PMID: 29750912 DOI: 10.1016/j.bbabio.2018.05.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/12/2018] [Accepted: 05/03/2018] [Indexed: 02/07/2023]
Abstract
The RAS pathway is a highly conserved cascade of protein-protein interactions and phosphorylation that is at the heart of signalling networks that govern proliferation, differentiation and cell survival. Recent findings indicate that the RAS pathway plays a role in the regulation of energy metabolism via the control of mitochondrial form and function but little is known on the participation of this effect in RAS-related rare human genetic diseases. Germline mutations that hyperactivate the RAS pathway have been discovered and linked to human developmental disorders that are known as RASopathies. Individuals with RASopathies, which are estimated to affect approximately 1/1000 human birth, share many overlapping characteristics, including cardiac malformations, short stature, neurocognitive impairment, craniofacial dysmorphy, cutaneous, musculoskeletal, and ocular abnormalities, hypotonia and a predisposition to developing cancer. Since the identification of the first RASopathy, type 1 neurofibromatosis (NF1), which is caused by the inactivation of neurofibromin 1, several other syndromes have been associated with mutations in the core components of the RAS-MAPK pathway. These syndromes include Noonan syndrome (NS), Noonan syndrome with multiple lentigines (NSML), which was formerly called LEOPARD syndrome, Costello syndrome (CS), cardio-facio-cutaneous syndrome (CFC), Legius syndrome (LS) and capillary malformation-arteriovenous malformation syndrome (CM-AVM). Here, we review current knowledge about the bioenergetics of the RASopathies and discuss the molecular control of energy homeostasis and mitochondrial physiology by the RAS pathway.
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Affiliation(s)
- L Dard
- Bordeaux University, 33000 Bordeaux, France; INSERM U1211, 33000 Bordeaux, France
| | - N Bellance
- Bordeaux University, 33000 Bordeaux, France; INSERM U1211, 33000 Bordeaux, France
| | - D Lacombe
- Bordeaux University, 33000 Bordeaux, France; INSERM U1211, 33000 Bordeaux, France; CHU de Bordeaux, Service de Génétique Médicale, F-33076 Bordeaux, France
| | - R Rossignol
- Bordeaux University, 33000 Bordeaux, France; INSERM U1211, 33000 Bordeaux, France; CELLOMET, CGFB-146 Rue Léo Saignat, Bordeaux, France.
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69
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Rajasekaran R, Felser A, Nuoffer JM, Dufour JF, St-Pierre MV. The histidine triad nucleotide-binding protein 2 (HINT-2) positively regulates hepatocellular energy metabolism. FASEB J 2018; 32:5143-5161. [PMID: 29913563 DOI: 10.1096/fj.201701429r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The histidine triad nucleotide-binding protein 2 (HINT-2) is a mitochondrial adenosine phosphoramidase expressed in hepatocytes. The phenotype of Hint2 knockout ( Hint2-/-) mice includes progressive hepatic steatosis and lysine hyperacetylation of mitochondrial proteins, which are features of respiratory chain malfunctions. We postulated that the absence of HINT-2 induces a defect in mitochondria bioenergetics. Isolated Hint2-/- hepatocytes produced less ATP and generated a lower mitochondrial membrane potential than did Hint2+/+ hepatocytes. In extracellular flux analyses with glucose, the basal, ATP-linked, and maximum oxygen consumption rates (OCRs) were decreased in Hint2-/- hepatocytes and in HepG2 cells lacking HINT-2. Conversely, in HINT-2 overexpressing SNU-449 and HepG2 cells, the basal, ATP-linked, and maximum OCRs were increased. Similarly, with palmitate, basal and maximum OCRs were decreased in Hint2-/- hepatocytes, but they were increased in HINT-2 overexpressing HepG2 cells. When assayed with radiolabeled substrate, palmitate oxidation was reduced by 25% in Hint2-/- mitochondria. In respirometry assays, complex I- and II-driven, coupled and uncoupled respirations and complex IV KCN-sensitive respiration were reduced in Hint2-/- mitochondria. Furthermore, HINT-2 associated with cardiolipin and glucose-regulated protein 75 kDa. Our study shows decreased electron transfer and oxidative phosphorylation capacity in the absence of HINT-2. The bioenergetics deficit accumulated over time in hepatocytes lacking HINT-2 likely leads to the secondary outcome of steatosis.-Rajasekaran, R., Felser, A., Nuoffer, J.-M., Dufour, J.-F., St-Pierre, M. V. The histidine triad nucleotide-binding protein 2 (HINT-2) positively regulates hepatocellular energy metabolism.
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Affiliation(s)
| | - Andrea Felser
- University Institute of Clinical Chemistry, University of Bern, Bern, Switzerland; and
| | - Jean-Marc Nuoffer
- University Institute of Clinical Chemistry, University of Bern, Bern, Switzerland; and
| | - Jean-François Dufour
- Department of Biomedical Research, University of Bern, Bern, Switzerland.,University Clinic of Visceral Surgery and Medicine, University Hospital Bern, Bern, Switzerland
| | - Marie V St-Pierre
- Department of Biomedical Research, University of Bern, Bern, Switzerland
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70
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Sánchez-Aranguren LC, Espinosa-González CT, González-Ortiz LM, Sanabria-Barrera SM, Riaño-Medina CE, Nuñez AF, Ahmed A, Vasquez-Vivar J, López M. Soluble Fms-Like Tyrosine Kinase-1 Alters Cellular Metabolism and Mitochondrial Bioenergetics in Preeclampsia. Front Physiol 2018; 9:83. [PMID: 29563877 PMCID: PMC5845757 DOI: 10.3389/fphys.2018.00083] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 01/23/2018] [Indexed: 01/05/2023] Open
Abstract
Preeclampsia is a maternal hypertensive disorder that affects up to 1 out of 12 pregnancies worldwide. It is characterized by proteinuria, endothelial dysfunction, and elevated levels of the soluble form of the vascular endothelial growth factor receptor-1 (VEGFR-1, known as sFlt-1). sFlt-1 effects are mediated in part by decreasing VEGF signaling. The direct effects of sFlt-1 on cellular metabolism and bioenergetics in preeclampsia, have not been established. The goal of this study was to evaluate whether sFlt-1 causes mitochondrial dysfunction leading to disruption of normal functioning in endothelial and placental cells in preeclampsia. Endothelial cells (ECs) and first-trimester trophoblast (HTR-8/SVneo) were treated with serum from preeclamptic women rich in sFlt-1 or with the recombinant protein. sFlt-1, dose-dependently inhibited ECs respiration and acidification rates indicating a metabolic phenotype switch enhancing glycolytic flux. HTR-8/SVneo displayed a strong basal glycolytic metabolism, remaining less sensitive to sFlt-1-induced mitochondrial impairment. Moreover, results obtained in ECs exposed to serum from preeclamptic subjects demonstrated that increased sFlt-1 leads to metabolic perturbations accountable for mitochondrial dysfunction observed in preeclampsia. sFlt-1 exacerbated mitochondrial reactive oxygen species (ROS) formation and mitochondrial membrane potential dissipation in ECs and trophoblasts exposed to serum from preeclamptic women. Forcing oxidative metabolism by culturing cells in galactose media, further sensitized cells to sFlt-1. This approach let us establish that sFlt-1 targets mitochondrial function in ECs. Effects of sFlt-1 on HTR-8/SVneo cells metabolism were amplified in galactose, demonstrating that sFlt-1 only target cells that rely mainly on oxidative metabolism. Together, our results establish the early metabolic perturbations induced by sFlt-1 and the resulting endothelial and mitochondrial dysfunction in preeclampsia.
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Affiliation(s)
- Lissette C Sánchez-Aranguren
- Traslational Biomedical Research Group, Fundación Cardiovascular de Colombia, Santander, Colombia.,Graduate Program in Biomedical Sciences, Faculty of Health, Universidad del Valle, Cali, Colombia
| | | | - Laura M González-Ortiz
- Traslational Biomedical Research Group, Fundación Cardiovascular de Colombia, Santander, Colombia.,Graduate Program in Biomedical Sciences, Faculty of Health, Universidad del Valle, Cali, Colombia
| | - Sandra M Sanabria-Barrera
- Traslational Biomedical Research Group, Fundación Cardiovascular de Colombia, Santander, Colombia.,Graduate Program in Biomedical Sciences, Faculty of Health, Universidad del Valle, Cali, Colombia
| | - Carlos E Riaño-Medina
- Graduate Program in Biomedical Sciences, Faculty of Health, Universidad del Valle, Cali, Colombia.,Maternal-Fetal Medicine Unit, Fundación Cardiovascular de Colombia, Santander, Colombia
| | - Andrés F Nuñez
- Maternal-Fetal Medicine Unit, Clínica Materno Infantil San Luis, Bucaramanga, Santander, Colombia
| | - Asif Ahmed
- Aston Medical Research Institute, Aston Medical School, Aston University, Birmingham, United Kingdom.,Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jeannette Vasquez-Vivar
- Redox Biology Program and Free Radical Research Center, Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Marcos López
- Traslational Biomedical Research Group, Fundación Cardiovascular de Colombia, Santander, Colombia.,Graduate Program in Biomedical Sciences, Faculty of Health, Universidad del Valle, Cali, Colombia
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71
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Szelechowski M, Amoedo N, Obre E, Léger C, Allard L, Bonneu M, Claverol S, Lacombe D, Oliet S, Chevallier S, Le Masson G, Rossignol R. Metabolic Reprogramming in Amyotrophic Lateral Sclerosis. Sci Rep 2018; 8:3953. [PMID: 29500423 PMCID: PMC5834494 DOI: 10.1038/s41598-018-22318-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 02/21/2018] [Indexed: 12/14/2022] Open
Abstract
Mitochondrial dysfunction in the spinal cord is a hallmark of amyotrophic lateral sclerosis (ALS), but the neurometabolic alterations during early stages of the disease remain unknown. Here, we investigated the bioenergetic and proteomic changes in ALS mouse motor neurons and patients' skin fibroblasts. We first observed that SODG93A mice presymptomatic motor neurons display alterations in the coupling efficiency of oxidative phosphorylation, along with fragmentation of the mitochondrial network. The proteome of presymptomatic ALS mice motor neurons also revealed a peculiar metabolic signature with upregulation of most energy-transducing enzymes, including the fatty acid oxidation (FAO) and the ketogenic components HADHA and ACAT2, respectively. Accordingly, FAO inhibition altered cell viability specifically in ALS mice motor neurons, while uncoupling protein 2 (UCP2) inhibition recovered cellular ATP levels and mitochondrial network morphology. These findings suggest a novel hypothesis of ALS bioenergetics linking FAO and UCP2. Lastly, we provide a unique set of data comparing the molecular alterations found in human ALS patients' skin fibroblasts and SODG93A mouse motor neurons, revealing conserved changes in protein translation, folding and assembly, tRNA aminoacylation and cell adhesion processes.
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Affiliation(s)
- M Szelechowski
- INSERM U1215, Neurocentre Magendie, 33077, Bordeaux, cedex, France
- Bordeaux University, 33000, Bordeaux, France
| | - N Amoedo
- Bordeaux University, 33000, Bordeaux, France
- INSERM U1211, MRGM, 33000, Bordeaux, France
| | - E Obre
- CELLOMET, Center of Functional Genomics (CGFB), 146 Rue Léo Saignat, 33000, Bordeaux, France
| | - C Léger
- INSERM U1215, Neurocentre Magendie, 33077, Bordeaux, cedex, France
- Bordeaux University, 33000, Bordeaux, France
| | - L Allard
- INSERM U1215, Neurocentre Magendie, 33077, Bordeaux, cedex, France
- Bordeaux University, 33000, Bordeaux, France
| | - M Bonneu
- Bordeaux University, 33000, Bordeaux, France
- Center of Functional Genomics (CGFB), Proteomic Facility, Bordeaux University, 33000, Bordeaux, France
| | - S Claverol
- Bordeaux University, 33000, Bordeaux, France
- Center of Functional Genomics (CGFB), Proteomic Facility, Bordeaux University, 33000, Bordeaux, France
| | - D Lacombe
- Bordeaux University, 33000, Bordeaux, France
- INSERM U1211, MRGM, 33000, Bordeaux, France
| | - S Oliet
- INSERM U1215, Neurocentre Magendie, 33077, Bordeaux, cedex, France
- Bordeaux University, 33000, Bordeaux, France
| | - S Chevallier
- INSERM U1215, Neurocentre Magendie, 33077, Bordeaux, cedex, France
- Bordeaux University, 33000, Bordeaux, France
| | - G Le Masson
- INSERM U1215, Neurocentre Magendie, 33077, Bordeaux, cedex, France.
- Bordeaux University, 33000, Bordeaux, France.
| | - R Rossignol
- Bordeaux University, 33000, Bordeaux, France.
- INSERM U1211, MRGM, 33000, Bordeaux, France.
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72
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Abstract
Mitochondrial DNA (mtDNA), which is essential for mitochondrial and cell function, is replicated and transcribed in the organelle by proteins that are entirely coded in the nucleus. Replication of mtDNA is challenged not only by threats related to the replication machinery and orchestration of DNA synthesis, but also by factors linked to the peculiarity of this genome. Indeed the architecture, organization, copy number, and location of mtDNA, which are markedly distinct from the nuclear genome, require ad hoc and complex regulation to ensure coordinated replication. As a consequence sub-optimal mtDNA replication, which results from compromised regulation of these factors, is generally associated with mitochondrial dysfunction and disease. Mitochondrial DNA replication should be considered in the context of the organelle and the whole cell, and not just a single genome or a single replication event. Major threats to mtDNA replication are linked to its dependence on both mitochondrial and nuclear factors, which require exquisite coordination of these crucial subcellular compartments. Moreover, regulation of replication events deals with a dynamic population of multiple mtDNA molecules rather than with a fixed number of genome copies, as it is the case for nuclear DNA. Importantly, the mechanistic aspects of mtDNA replication are still debated. We describe here major challenges for human mtDNA replication, the mechanistic aspects of the process that are to a large extent original, and their consequences on disease.
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Affiliation(s)
- Miria Ricchetti
- Institut Pasteur, Department of Developmental and Stem Cell Biology, Stem Cells and Development, 75724 Cedex15, Paris, France; Team Stability of Nuclear and Mitochondrial DNA, CNRS UMR 3738, 75724, Cedex15, Paris, France.
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73
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Stagl M, Bozsik M, Karow C, Wertz D, Kloehn I, Pillai S, Gasser PJ, Gilmartin MR, Evans JA. Chronic stress alters adrenal clock function in a sexually dimorphic manner. J Mol Endocrinol 2018; 60:55-69. [PMID: 29378866 DOI: 10.1530/jme-17-0146] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 12/04/2017] [Indexed: 11/08/2022]
Abstract
Glucocorticoid production is gated at the molecular level by the circadian clock in the adrenal gland. Stress influences daily rhythms in behavior and physiology, but it remains unclear how stress affects the function of the adrenal clock itself. Here, we examine the influence of stress on adrenal clock function by tracking PERIOD2::LUCIFERASE (PER2::LUC) rhythms in vitro Relative to non-stressed controls, adrenals from stressed mice displayed marked changes in PER2::LUC rhythms. Interestingly, the effect of stress on adrenal rhythms varied by sex and the type of stress experienced in vivo To investigate the basis of sex differences in the adrenal response to stress, we next stimulated male and female adrenals in vitro with adrenocorticotropic hormone (ACTH). ACTH shifted phase and increased amplitude of adrenal PER2::LUC rhythms. Both phase and amplitude responses were larger in female adrenals than in male adrenals, an observation consistent with previously described sex differences in the physiological response to stress. Lastly, we reversed the sex difference in adrenal clock function using stress and sex hormone manipulations to test its role in driving adrenal responses to ACTH. We find that adrenal responsiveness to ACTH is inversely proportional to the amplitude of adrenal PER2::LUC rhythms. This suggests that larger ACTH responses from female adrenals may be driven by their lower amplitude molecular rhythms. Collectively, these results indicate a reciprocal relationship between stress and the adrenal clock, with stress influencing adrenal clock function and the state of the adrenal clock gating the response to stress in a sexually dimorphic manner.
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Affiliation(s)
- Matthew Stagl
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Mary Bozsik
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Christopher Karow
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - David Wertz
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Ian Kloehn
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Savin Pillai
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Paul J Gasser
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Marieke R Gilmartin
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
| | - Jennifer A Evans
- Department of Biomedical SciencesMarquette University, Milwaukee, Wisconsin, USA
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74
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Analysis of a Functional Dimer Model of Ubiquinol Cytochrome c Oxidoreductase. Biophys J 2017; 113:1599-1612. [PMID: 28978450 PMCID: PMC5627346 DOI: 10.1016/j.bpj.2017.08.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 08/04/2017] [Accepted: 08/10/2017] [Indexed: 11/21/2022] Open
Abstract
Ubiquinol cytochrome c oxidoreductase (bc1 complex) serves as an important electron junction in many respiratory systems. It funnels electrons coming from NADH and ubiquinol to cytochrome c, but it is also capable of producing significant amounts of the free radical superoxide. In situ and in other experimental systems, the enzyme exists as a dimer. But until recently, it was believed to operate as a functional monomer. Here we show that a functional dimer model is capable of explaining both kinetic and superoxide production rate data. The model consists of six electronic states characterized by the number of electrons deposited on the complex. It is fully reversible and strictly adheres to the thermodynamics governing the reactions. A total of nine independent data sets were used to parameterize the model. To explain the data with a consistent set of parameters, it was necessary to incorporate intramonomer Coulombic effects between hemes bL and bH and intermonomer Coulombic effects between bL hemes. The fitted repulsion energies fall within the theoretical range of electrostatic calculations. In addition, model analysis demonstrates that the Q pool is mostly oxidized under normal physiological operation but can switch to a more reduced state when reverse electron transport conditions are in place.
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75
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Intraspecific variation and plasticity in mitochondrial oxygen binding affinity as a response to environmental temperature. Sci Rep 2017; 7:16238. [PMID: 29176558 PMCID: PMC5701142 DOI: 10.1038/s41598-017-16598-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 11/15/2017] [Indexed: 01/19/2023] Open
Abstract
Mitochondrial function has been suggested to underlie constraints on whole-organism aerobic performance and associated hypoxia and thermal tolerance limits, but most studies have focused on measures of maximum mitochondrial capacity. Here we investigated whether variation in mitochondrial oxygen kinetics could contribute to local adaptation and plasticity in response to temperature using two subspecies of the Atlantic killifish (Fundulus heteroclitus) acclimated to a range of temperatures (5, 15, and 33 °C). The southern subspecies of F. heteroclitus, which has superior thermal and hypoxia tolerances compared to the northern subspecies, exhibited lower mitochondrial O2 P50 (higher O2 affinity). Acclimation to thermal extremes (5 or 33 °C) altered mitochondrial O2 P50 in both subspecies consistent with the effects of thermal acclimation on whole-organism thermal tolerance limits. We also examined differences between subspecies and thermal acclimation effects on whole-blood Hb O2-P50 to assess whether variation in oxygen delivery is involved in these responses. In contrast to the clear differences between subspecies in mitochondrial O2-P50 there were no differences in whole-blood Hb-O2 P50 between subspecies. Taken together these findings support a general role for mitochondrial oxygen kinetics in differentiating whole-organism aerobic performance and thus in influencing species responses to environmental change.
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76
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Femnou AN, Kuzmiak-Glancy S, Covian R, Giles AV, Kay MW, Balaban RS. Intracardiac light catheter for rapid scanning transmural absorbance spectroscopy of perfused myocardium: measurement of myoglobin oxygenation and mitochondria redox state. Am J Physiol Heart Circ Physiol 2017; 313:H1199-H1208. [PMID: 28939647 DOI: 10.1152/ajpheart.00306.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/05/2017] [Accepted: 09/19/2017] [Indexed: 11/22/2022]
Abstract
Absorbance spectroscopy of intrinsic cardiac chromophores provides nondestructive assessment of cytosolic oxygenation and mitochondria redox state. Isolated perfused heart spectroscopy is usually conducted by collecting reflected light from the heart surface, which represents a combination of surface scattering events and light that traversed portions of the myocardium. Reflectance spectroscopy with complex surface scattering effects in the beating heart leads to difficulty in quantitating chromophore absorbance. In this study, surface scattering was minimized and transmural path length optimized by placing a light source within the left ventricular chamber while monitoring transmurally transmitted light at the epicardial surface. The custom-designed intrachamber light catheter was a flexible coaxial cable (2.42-Fr) terminated with an encapsulated side-firing LED of 1.8 × 0.8 mm, altogether similar in size to a Millar pressure catheter. The LED catheter had minimal impact on aortic flow and heart rate in Langendorff perfusion and did not impact stability of the left ventricule of the working heart. Changes in transmural absorbance spectra were deconvoluted using a library of chromophore reference spectra to quantify the relative contribution of specific chromophores to the changes in measured absorbance. This broad-band spectral deconvolution approach eliminated errors that may result from simple dual-wavelength absorbance intensity. The myoglobin oxygenation level was only 82.2 ± 3.0%, whereas cytochrome c and cytochrome a + a3 were 13.3 ± 1.4% and 12.6 ± 2.2% reduced, respectively, in the Langendorff-perfused heart. The intracardiac illumination strategy permits transmural optical absorbance spectroscopy in perfused hearts, which provides a noninvasive real-time monitor of cytosolic oxygenation and mitochondria redox state.NEW & NOTEWORTHY Here, a novel nondestructive real-time approach for monitoring intrinsic indicators of cardiac metabolism and oxygenation is described using a catheter-based transillumination of the left ventricular free wall together with complete spectral analysis of transmitted light. This approach is a significant improvement in the quality of cardiac optical absorbance spectroscopic metabolic analyses.
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Affiliation(s)
- Armel N Femnou
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland; and.,Department of Biomedical Engineering, The George Washington University, Washington, District of Columbia
| | - Sarah Kuzmiak-Glancy
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland; and.,Department of Biomedical Engineering, The George Washington University, Washington, District of Columbia
| | - Raul Covian
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland; and
| | - Abigail V Giles
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland; and
| | - Matthew W Kay
- Department of Biomedical Engineering, The George Washington University, Washington, District of Columbia
| | - Robert S Balaban
- Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland; and
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77
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Lai N, Kummitha C, Hoppel C. Defects in skeletal muscle subsarcolemmal mitochondria in a non-obese model of type 2 diabetes mellitus. PLoS One 2017; 12:e0183978. [PMID: 28850625 PMCID: PMC5574550 DOI: 10.1371/journal.pone.0183978] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/15/2017] [Indexed: 11/18/2022] Open
Abstract
Skeletal muscle resistance to insulin is related to accumulation of lipid-derived products, but it is not clear whether this accumulation is caused by skeletal muscle mitochondrial dysfunction. Diabetes and obesity are reported to have a selective effect on the function of subsarcolemmal and interfibrillar mitochondria in insulin-resistant skeletal muscle. The current study investigated the role of the subpopulations of mitochondria in the pathogenesis of insulin resistance in the absence of obesity. A non-obese spontaneous rat model of type 2 diabetes mellitus, (Goto-Kakizaki), was used to evaluate function and biochemical properties in both populations of skeletal muscle mitochondria. In subsarcolemmal mitochondria, minor defects are observed whereas in interfibrillar mitochondria function is preserved. Subsarcolemmal mitochondria defects characterized by a mild decline of oxidative phosphorylation efficiency are related to ATP synthase and structural alterations of inner mitochondria membrane but are considered unimportant because of the absence of defects upstream as shown with polarographic and spectrophometric assays. Fatty acid transport and oxidation is preserved in both population of mitochondria, whereas palmitoyl-CoA increased 25% in interfibrillar mitochondria of diabetic rats. Contrary to popular belief, these data provide compelling evidence that mitochondrial function is unaffected in insulin-resistant skeletal muscle from T2DM non-obese rats.
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Affiliation(s)
- Nicola Lai
- Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, Virginia, United States of America
- Biomedical Engineering Institute, Old Dominion University, Norfolk, Virginia, United States of America
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio, United States of America
- * E-mail:
| | - China Kummitha
- Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, Virginia, United States of America
- Biomedical Engineering Institute, Old Dominion University, Norfolk, Virginia, United States of America
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Charles Hoppel
- Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
- Center for Mitochondrial Disease, School of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
- Department of Medicine, School of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
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78
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Heiske M, Letellier T, Klipp E. Comprehensive mathematical model of oxidative phosphorylation valid for physiological and pathological conditions. FEBS J 2017. [PMID: 28646582 DOI: 10.1111/febs.14151] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We developed a mathematical model of oxidative phosphorylation (OXPHOS) that allows for a precise description of mitochondrial function with respect to the respiratory flux and the ATP production. The model reproduced flux-force relationships under various experimental conditions (state 3 and 4, uncoupling, and shortage of respiratory substrate) as well as time courses, exhibiting correct P/O ratios. The model was able to reproduce experimental threshold curves for perturbations of the respiratory chain complexes, the F1 F0 -ATP synthase, the ADP/ATP carrier, the phosphate/OH carrier, and the proton leak. Thus, the model is well suited to study complex interactions within the OXPHOS system, especially with respect to physiological adaptations or pathological modifications, influencing substrate and product affinities or maximal catalytic rates. Moreover, it could be a useful tool to study the role of OXPHOS and its capacity to compensate or enhance physiopathologies of the mitochondrial and cellular energy metabolism.
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Affiliation(s)
- Margit Heiske
- Laboratoire d'Anthropologie Moléculaire et Imaginérie de Synthèse, Médecine Evolutive, UMR 5288 CNRS, Faculté de Médecine, Université de Toulouse, France.,Theoretische Biophysik, Institut für Biologie, Humboldt-Universität zu Berlin, Germany
| | - Thierry Letellier
- Laboratoire d'Anthropologie Moléculaire et Imaginérie de Synthèse, Médecine Evolutive, UMR 5288 CNRS, Faculté de Médecine, Université de Toulouse, France
| | - Edda Klipp
- Theoretische Biophysik, Institut für Biologie, Humboldt-Universität zu Berlin, Germany
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79
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Farmer T, Reinecke JB, Xie S, Bahl K, Naslavsky N, Caplan S. Control of mitochondrial homeostasis by endocytic regulatory proteins. J Cell Sci 2017; 130:2359-2370. [PMID: 28596240 DOI: 10.1242/jcs.204537] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 05/31/2017] [Indexed: 12/19/2022] Open
Abstract
Mitochondria play essential roles in cellular energy processes, including ATP production, control of reactive oxygen species (ROS) and apoptosis. While mitochondrial function is regulated by the dynamics of fusion and fission, mitochondrial homeostasis remains incompletely understood. Recent studies implicate dynamin-2 and dynamin-related protein-1 (Drp1, also known as DNM1L), as GTPases involved in mitochondrial fission. Here, we identify the ATPase and endocytic protein EHD1 as a novel regulator of mitochondrial fission. EHD1 depletion induces a static and elongated network of mitochondria in the cell. However, unlike dynamin-2 and Drp1, whose depletion protects cells from staurosporine-induced mitochondrial fragmentation, EHD1-depleted cells remain sensitive to staurosporine, suggesting a different mechanism for EHD1 function. Recent studies have demonstrated that VPS35 and the retromer complex influence mitochondrial homeostasis either by Mul1-mediated ubiquitylation and degradation of the fusion protein Mfn2, or by removal of inactive Drp1 from the mitochondrial membrane. We demonstrate that EHD1 and its interaction partner rabankyrin-5 interact with the retromer complex to influence mitochondrial dynamics, likely by inducing VPS35-mediated removal of inactive Drp1 from mitochondrial membranes. Our study sheds light on mitochondrial dynamics, expanding a new paradigm of endocytic protein regulation of mitochondrial homeostasis.
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Affiliation(s)
- Trey Farmer
- The Department of Biochemistry and Molecular Biology, The University of Nebraska Medical Center, Omaha, NE 68198, USA.,The Fred and Pamela Buffett Cancer Center, The University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - James B Reinecke
- The Department of Biochemistry and Molecular Biology, The University of Nebraska Medical Center, Omaha, NE 68198, USA.,The Fred and Pamela Buffett Cancer Center, The University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Shuwei Xie
- The Department of Biochemistry and Molecular Biology, The University of Nebraska Medical Center, Omaha, NE 68198, USA.,The Fred and Pamela Buffett Cancer Center, The University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Kriti Bahl
- The Department of Biochemistry and Molecular Biology, The University of Nebraska Medical Center, Omaha, NE 68198, USA.,The Fred and Pamela Buffett Cancer Center, The University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Naava Naslavsky
- The Department of Biochemistry and Molecular Biology, The University of Nebraska Medical Center, Omaha, NE 68198, USA .,The Fred and Pamela Buffett Cancer Center, The University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Steve Caplan
- The Department of Biochemistry and Molecular Biology, The University of Nebraska Medical Center, Omaha, NE 68198, USA .,The Fred and Pamela Buffett Cancer Center, The University of Nebraska Medical Center, Omaha, NE 68198, USA
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80
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Wakim J, Goudenege D, Perrot R, Gueguen N, Desquiret-Dumas V, Chao de la Barca JM, Dalla Rosa I, Manero F, Le Mao M, Chupin S, Chevrollier A, Procaccio V, Bonneau D, Logan DC, Reynier P, Lenaers G, Khiati S. CLUH couples mitochondrial distribution to the energetic and metabolic status. J Cell Sci 2017; 130:1940-1951. [PMID: 28424233 DOI: 10.1242/jcs.201616] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/12/2017] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial dynamics and distribution are critical for supplying ATP in response to energy demand. CLUH is a protein involved in mitochondrial distribution whose dysfunction leads to mitochondrial clustering, the metabolic consequences of which remain unknown. To gain insight into the role of CLUH on mitochondrial energy production and cellular metabolism, we have generated CLUH-knockout cells using CRISPR/Cas9. Mitochondrial clustering was associated with a smaller cell size and with decreased abundance of respiratory complexes, resulting in oxidative phosphorylation (OXPHOS) defects. This energetic impairment was found to be due to the alteration of mitochondrial translation and to a metabolic shift towards glucose dependency. Metabolomic profiling by mass spectroscopy revealed an increase in the concentration of some amino acids, indicating a dysfunctional Krebs cycle, and increased palmitoylcarnitine concentration, indicating an alteration of fatty acid oxidation, and a dramatic decrease in the concentrations of phosphatidylcholine and sphingomyeline, consistent with the decreased cell size. Taken together, our study establishes a clear function for CLUH in coupling mitochondrial distribution to the control of cell energetic and metabolic status.
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Affiliation(s)
- Jamal Wakim
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - David Goudenege
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Rodolphe Perrot
- SCIAM, Institut de Biologie en Sante, Université d'Angers, Angers 49933, France
| | - Naig Gueguen
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Valerie Desquiret-Dumas
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | | | | | - Florence Manero
- SCIAM, Institut de Biologie en Sante, Université d'Angers, Angers 49933, France
| | - Morgane Le Mao
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Stephanie Chupin
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Arnaud Chevrollier
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Vincent Procaccio
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Dominique Bonneau
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - David C Logan
- MitoStress team, IRHS, Université d'Angers, Agrocampus-Ouest, INRA, SFR QuaSaV, Beaucouzé 49071, France
| | - Pascal Reynier
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Guy Lenaers
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
| | - Salim Khiati
- Equipe MitoLab, Institut MitoVasc, Université d'Angers, UMR CNRS 6015, INSERM U1083, Angers, 49933 France
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81
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Alternative Interventions to Prevent Oxidative Damage following Ischemia/Reperfusion. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:7190943. [PMID: 28116037 PMCID: PMC5225393 DOI: 10.1155/2016/7190943] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/23/2016] [Accepted: 10/12/2016] [Indexed: 12/25/2022]
Abstract
Ischemia/reperfusion (I/R) lesions are a phenomenon that occurs in multiple pathological states and results in a series of events that end in irreparable damage that severely affects the recovery and health of patients. The principal therapeutic approaches include preconditioning, postconditioning, and remote ischemic preconditioning, which when used separately do not have a great impact on patient mortality or prognosis. Oxidative stress is known to contribute to the damage caused by I/R; however, there are no pharmacological approaches to limit or prevent this. Here, we explain the relationship between I/R and the oxidative stress process and describe some pharmacological options that may target oxidative stress-states.
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82
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CEDIKOVA M, PITULE P, KRIPNEROVA M, MARKOVA M, KUNCOVA J. Multiple Roles of Mitochondria in Aging Processes. Physiol Res 2016; 65:S519-S531. [DOI: 10.33549/physiolres.933538] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Aging is a multifactorial process influenced by genetic factors, nutrition, and lifestyle. According to mitochondrial theory of aging, mitochondrial dysfunction is widely considered a major contributor to age-related processes. Mitochondria are both the main source and targets of detrimental reactions initiated in association with age-dependent deterioration of the cellular functions. Reactions leading to increased reactive oxygen species generation, mtDNA mutations, and oxidation of mitochondrial proteins result in subsequent induction of apoptotic events, impaired oxidative phosphorylation capacity, mitochondrial dynamics, biogenesis and autophagy. This review summarizes the major changes of mitochondria related to aging, with emphasis on mitochondrial DNA mutations, the role of the reactive oxygen species, and structural and functional changes of mitochondria.
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Affiliation(s)
| | | | | | | | - J. KUNCOVA
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
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83
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Etzler JC, Bollo M, Holstein D, Deng JJ, Perez V, Lin DT, Richardson A, Bai Y, Lechleiter JD. Cyclophilin D over-expression increases mitochondrial complex III activity and accelerates supercomplex formation. Arch Biochem Biophys 2016; 613:61-68. [PMID: 27916505 DOI: 10.1016/j.abb.2016.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/27/2016] [Accepted: 11/23/2016] [Indexed: 12/15/2022]
Abstract
Cyclophilin D (CyPD), a mitochondrial matrix protein, has been widely studied for its role in mitochondrial-mediated cell death. Unexpectedly, we previously discovered that overexpression of CyPD in a stable cell line, increased mitochondrial membrane potentials and enhanced cell survival under conditions of oxidative stress. Here, we investigated the underlying mechanisms responsible for these findings. Spectrophotometric measurements in isolated mitochondria revealed that overexpression of CyPD in HEK293 cells increased respiratory chain activity, but only for Complex III (CIII). Acute treatment of mitochondria with the immumosupressant cyclosporine A did not affect CIII activity. Expression levels of the CIII subunits cytochrome b and Rieske-FeS were elevated in HEK293 cells overexpressing CyPD. However, CIII activity was still significantly higher compared to control mitochondria, even when normalized by protein expression. Blue native gel electrophoresis and Western blot assays revealed a molecular interaction of CyPD with CIII and increased levels of supercomplexes in mitochondrial protein extracts. Radiolabeled protein synthesis in mitochondria showed that CIII assembly and formation of supercomplexes containing CIII were significantly faster when CyPD was overexpressed. Taken together, these data indicate that CyPD regulates mitochondrial metabolism, and likely cell survival, by promoting more efficient electrons flow through the respiratory chain via increased supercomplex formation.
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Affiliation(s)
- Julie C Etzler
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Mariana Bollo
- Instituto de Investigación Médica M y M Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, 5016, Argentina
| | - Deborah Holstein
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Janice Jianhong Deng
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Viviana Perez
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 73104, USA
| | - Da-Ting Lin
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - Arlan Richardson
- Department of Geriatrics, University of Oklahoma Health Science Center, Oklahoma City, OK, 73104, USA
| | - Yidong Bai
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA
| | - James D Lechleiter
- Department of Cell Systems and Anatomy, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, USA.
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84
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Endlicher R, Křiváková P, Lotková H, Milerová M, Drahota Z, Červinková Z. Tissue Specific Sensitivity of Mitochondrial Permeability Transition Pore to Ca2+ Ions. ACTA MEDICA (HRADEC KRÁLOVÉ) 2016. [DOI: 10.14712/18059694.2016.107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Ca2+-induced opening of the mitochondrial permeability transition pore (MPTP) is involved in induction of apoptotic and necrotic processes. We studied sensitivity of MPTP to calcium using the model of Ca2+-induced, cyclosporine A-sensitive mitochondrial swelling. Presented data indicate that the extent of mitochondrial swelling (dA520/4 min) induced by addition of 25 μM Ca2+ is seven-fold higher in liver than in heart mitochondria (0.564 ± 0.08/0.077± 0.01). The extent of swelling induced by 100 μM Ca2+ was in liver tree times higher than in heart mitochondria (0.508±0.05/ 0.173±0.02). Cyclosporine A sensitivity showed that opening of the MPTP is involved. We may thus conclude that especially at low Ca2+ concentration heart mitochondria are more resistant to damaging effect of Ca2+ than liver mitochondria. These finding thus support hypothesis that there exist tissue specific strategies of cell protection against induction of the apoptotic and necrotic processes.
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85
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Spáčilová J, Hůlková M, Hruštincová A, Čapek V, Tesařová M, Hansíková H, Zeman J. Analysis of expression profiles of genes involved in F(o)F(1)-ATP synthase biogenesis during perinatal development in rat liver and skeletal muscle. Physiol Res 2016; 65:597-608. [PMID: 26988161 DOI: 10.33549/physiolres.933126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
During the process of intra-uterine mammalian fetal development, the oxygen supply in growing fetus is low. A rapid switch from glycolysis-based metabolism to oxidative phosphorylation (OXPHOS) must proceed during early postnatal adaptation to extra-uterine conditions. Mitochondrial biogenesis and mammalian mitochondrial F(o)F(1)-ATP synthase assembly (complex V, EC 3.6.3.14, ATPase) are complex processes regulated by multiple transcription regulators and assembly factors. Using RNA expression analysis of rat liver and skeletal tissue (Rattus norvegicus, Berkenhout, 1769), we describe the expression profiles of 20 genes involved in mitochondrial maturation and ATP synthase biogenesis in detail between the 16th and 22nd day of gestation and the first 4 days of life. We observed that the most important expression shift occurred in the liver between the 20th and 22nd day of gestation, indicating that the fetus prepares for birth about two days before parturition. The detailed mechanism regulating the perinatal adaptation process is not yet known. Deeper insights in perinatal physiological development will help to assess mitochondrial dysfunction in the broader context of cell metabolism in preterm newborns or neonates with poor adaptation to extra-uterine life.
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Affiliation(s)
- J Spáčilová
- Department of Pediatrics and Adolescent Medicine, First Faculty of Medicine, Charles University in Prague, General University Hospital in Prague, Prague, Czech Republic.
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86
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Kruse R, Højlund K. Mitochondrial phosphoproteomics of mammalian tissues. Mitochondrion 2016; 33:45-57. [PMID: 27521611 DOI: 10.1016/j.mito.2016.08.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 08/08/2016] [Accepted: 08/09/2016] [Indexed: 12/31/2022]
Abstract
Mitochondria are essential for several biological processes including energy metabolism and cell survival. Accordingly, impaired mitochondrial function is involved in a wide range of human pathologies including diabetes, cancer, cardiovascular, and neurodegenerative diseases. Within the past decade a growing body of evidence indicates that reversible phosphorylation plays an important role in the regulation of a variety of mitochondrial processes as well as tissue-specific mitochondrial functions in mammals. The rapidly increasing number of mitochondrial phosphorylation sites and phosphoproteins identified is largely ascribed to recent advances in phosphoproteomic technologies such as fractionation, phosphopeptide enrichment, and high-sensitivity mass spectrometry. However, the functional importance and the specific kinases and phosphatases involved have yet to be determined for the majority of these mitochondrial phosphorylation sites. This review summarizes the progress in establishing the mammalian mitochondrial phosphoproteome and the technical challenges encountered while characterizing it, with a particular focus on large-scale phosphoproteomic studies of mitochondria from human skeletal muscle.
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Affiliation(s)
- Rikke Kruse
- Department of Endocrinology, Odense University Hospital, DK-5000, Odense, Denmark; The Section of Molecular Diabetes & Metabolism, Department of Clinical Research and Institute of Molecular Medicine, University of Southern Denmark, DK-5000 Odense, Denmark
| | - Kurt Højlund
- Department of Endocrinology, Odense University Hospital, DK-5000, Odense, Denmark; The Section of Molecular Diabetes & Metabolism, Department of Clinical Research and Institute of Molecular Medicine, University of Southern Denmark, DK-5000 Odense, Denmark.
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87
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Lunetti P, Damiano F, De Benedetto G, Siculella L, Pennetta A, Muto L, Paradies E, Marobbio CMT, Dolce V, Capobianco L. Characterization of Human and Yeast Mitochondrial Glycine Carriers with Implications for Heme Biosynthesis and Anemia. J Biol Chem 2016; 291:19746-59. [PMID: 27476175 DOI: 10.1074/jbc.m116.736876] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Indexed: 01/19/2023] Open
Abstract
Heme is an essential molecule in many biological processes, such as transport and storage of oxygen and electron transfer as well as a structural component of hemoproteins. Defects of heme biosynthesis in developing erythroblasts have profound medical implications, as represented by sideroblastic anemia. The synthesis of heme requires the uptake of glycine into the mitochondrial matrix where glycine is condensed with succinyl coenzyme A to yield δ-aminolevulinic acid. Herein we describe the biochemical and molecular characterization of yeast Hem25p and human SLC25A38, providing evidence that they are mitochondrial carriers for glycine. In particular, the hem25Δ mutant manifests a defect in the biosynthesis of δ-aminolevulinic acid and displays reduced levels of downstream heme and mitochondrial cytochromes. The observed defects are rescued by complementation with yeast HEM25 or human SLC25A38 genes. Our results identify new proteins in the heme biosynthetic pathway and demonstrate that Hem25p and its human orthologue SLC25A38 are the main mitochondrial glycine transporters required for heme synthesis, providing definitive evidence of their previously proposed glycine transport function. Furthermore, our work may suggest new therapeutic approaches for the treatment of congenital sideroblastic anemia.
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Affiliation(s)
- Paola Lunetti
- From the Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy
| | - Fabrizio Damiano
- From the Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy
| | - Giuseppe De Benedetto
- Laboratory of Analytical and Isotopic Mass Spectrometry, Department of Cultural Heritage, University of Salento, 73100 Lecce, Italy
| | - Luisa Siculella
- From the Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy
| | - Antonio Pennetta
- Laboratory of Analytical and Isotopic Mass Spectrometry, Department of Cultural Heritage, University of Salento, 73100 Lecce, Italy
| | - Luigina Muto
- Department of Pharmacy, Health, and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende (Cosenza), Italy
| | - Eleonora Paradies
- Consiglio Nazionale delle Ricerche, Institute of Biomembranes and Bioenergetics, 70125 Bari, Italy, and
| | - Carlo Marya Thomas Marobbio
- Department of Biosciences, Biotechnology, and Pharmacological Sciences, University of Bari, 70125 Bari, Italy
| | - Vincenza Dolce
- Department of Pharmacy, Health, and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende (Cosenza), Italy
| | - Loredana Capobianco
- From the Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy
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88
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Korzeniewski B. Faster and stronger manifestation of mitochondrial diseases in skeletal muscle than in heart related to cytosolic inorganic phosphate (Pi) accumulation. J Appl Physiol (1985) 2016; 121:424-37. [PMID: 27283913 DOI: 10.1152/japplphysiol.00358.2016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 06/08/2016] [Indexed: 01/04/2023] Open
Abstract
A model of the cell bioenergetic system was used to compare the effect of oxidative phosphorylation (OXPHOS) deficiencies in a broad range of moderate ATP demand in skeletal muscle and heart. Computer simulations revealed that kinetic properties of the system are similar in both cases despite the much higher mitochondria content and "basic" OXPHOS activity in heart than in skeletal muscle, because of a much higher each-step activation (ESA) of OXPHOS in skeletal muscle than in heart. Large OXPHOS deficiencies lead in both tissues to a significant decrease in oxygen consumption (V̇o2) and phosphocreatine (PCr) and increase in cytosolic ADP, Pi, and H(+) The main difference between skeletal muscle and heart is a much higher cytosolic Pi concentration in healthy tissue and much higher cytosolic Pi accumulation (level) at low OXPHOS activities in the former, caused by a higher PCr level in healthy tissue (and higher total phosphate pool) and smaller Pi redistribution between cytosol and mitochondria at OXPHOS deficiency. This difference does not depend on ATP demand in a broad range. A much greater Pi increase and PCr decrease during rest-to-moderate work transition in skeletal muscle at OXPHOS deficiencies than at normal OXPHOS activity significantly slows down the V̇o2 on-kinetics. Because high cytosolic Pi concentrations cause fatigue in skeletal muscle and can compromise force generation in skeletal muscle and heart, this system property can contribute to the faster and stronger manifestation of mitochondrial diseases in skeletal muscle than in heart. Shortly, skeletal muscle with large OXPHOS deficiencies becomes fatigued already during low/moderate exercise.
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Affiliation(s)
- Bernard Korzeniewski
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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89
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Vogt S, Rhiel A, Weber P, Ramzan R. Revisiting Kadenbach: Electron flux rate through cytochrome c-oxidase determines the ATP-inhibitory effect and subsequent production of ROS. Bioessays 2016; 38:556-67. [PMID: 27171124 PMCID: PMC5084804 DOI: 10.1002/bies.201600043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Mitochondrial respiration is the predominant source of ATP. Excessive rates of electron transport cause a higher production of harmful reactive oxygen species (ROS). There are two regulatory mechanisms known. The first, according to Mitchel, is dependent on the mitochondrial membrane potential that drives ATP synthase for ATP production, and the second, the Kadenbach mechanism, is focussed on the binding of ATP to Cytochrome c Oxidase (CytOx) at high ATP/ADP ratios, which results in an allosteric conformational change to CytOx, causing inhibition. In times of stress, ATP-dependent inhibition is switched off and the activity of CytOx is exclusively determined by the membrane potential, leading to an increase in ROS production. The second mechanism for respiratory control depends on the quantity of electron transfer to the Heme aa3 of CytOx. When ATP is bound to CytOx the enzyme is inhibited, and ROS formation is decreased, although the mitochondrial membrane potential is increased.
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Affiliation(s)
- Sebastian Vogt
- Cardiovascular Research Lab, Biochemical Pharmacological Research CenterPhilipps‐University MarburgMarburgGermany
| | - Annika Rhiel
- Cardiovascular Research Lab, Biochemical Pharmacological Research CenterPhilipps‐University MarburgMarburgGermany
| | - Petra Weber
- Cardiovascular Research Lab, Biochemical Pharmacological Research CenterPhilipps‐University MarburgMarburgGermany
| | - Rabia Ramzan
- Cardiovascular Research Lab, Biochemical Pharmacological Research CenterPhilipps‐University MarburgMarburgGermany
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90
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Koliaki C, Roden M. Alterations of Mitochondrial Function and Insulin Sensitivity in Human Obesity and Diabetes Mellitus. Annu Rev Nutr 2016; 36:337-67. [PMID: 27146012 DOI: 10.1146/annurev-nutr-071715-050656] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mitochondrial function refers to a broad spectrum of features such as resting mitochondrial activity, (sub)maximal oxidative phosphorylation capacity (OXPHOS), and mitochondrial dynamics, turnover, and plasticity. The interaction between mitochondria and insulin sensitivity is bidirectional and varies depending on tissue, experimental model, methodological approach, and features of mitochondrial function tested. In human skeletal muscle, mitochondrial abnormalities may be inherited (e.g., lower mitochondrial content) or acquired (e.g., impaired OXPHOS capacity and plasticity). Abnormalities ultimately lead to lower mitochondrial functionality due to or resulting in insulin resistance and type 2 diabetes mellitus. Similar mechanisms can also operate in adipose tissue and heart muscle. In contrast, mitochondrial oxidative capacity is transiently upregulated in the liver of obese insulin-resistant humans with or without fatty liver, giving rise to oxidative stress and declines in advanced fatty liver disease. These data suggest a highly tissue-specific interaction between insulin sensitivity and oxidative metabolism during the course of metabolic diseases in humans.
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Affiliation(s)
- Chrysi Koliaki
- Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, Düsseldorf 40225, Germany.,Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf 40225, Germany.,German Center for Diabetes Research (DZD e.V.), Düsseldorf 40225, Germany;
| | - Michael Roden
- Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, Düsseldorf 40225, Germany.,Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, Düsseldorf 40225, Germany.,German Center for Diabetes Research (DZD e.V.), Düsseldorf 40225, Germany;
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91
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Mitochondria in White, Brown, and Beige Adipocytes. Stem Cells Int 2016; 2016:6067349. [PMID: 27073398 PMCID: PMC4814709 DOI: 10.1155/2016/6067349] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 01/17/2016] [Accepted: 01/28/2016] [Indexed: 12/18/2022] Open
Abstract
Mitochondria play a key role in energy metabolism in many tissues, including cardiac and skeletal muscle, brain, liver, and adipose tissue. Three types of adipose depots can be identified in mammals, commonly classified according to their colour appearance: the white (WAT), the brown (BAT), and the beige/brite/brown-like (bAT) adipose tissues. WAT is mainly involved in the storage and mobilization of energy and BAT is predominantly responsible for nonshivering thermogenesis. Recent data suggest that adipocyte mitochondria might play an important role in the development of obesity through defects in mitochondrial lipogenesis and lipolysis, regulation of adipocyte differentiation, apoptosis, production of oxygen radicals, efficiency of oxidative phosphorylation, and regulation of conversion of white adipocytes into brown-like adipocytes. This review summarizes the main characteristics of each adipose tissue subtype and describes morphological and functional modifications focusing on mitochondria and their activity in healthy and unhealthy adipocytes.
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92
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Arachidonyl-2-Chloroethylamide Alleviates Cerebral Ischemia Injury Through Glycogen Synthase Kinase-3β-Mediated Mitochondrial Biogenesis and Functional Improvement. Mol Neurobiol 2016; 54:1240-1253. [PMID: 26820679 DOI: 10.1007/s12035-016-9731-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 01/19/2016] [Indexed: 02/07/2023]
Abstract
Arachidonyl-2-chloroethylamide (ACEA), a highly selective agonist of cannabinoid receptor 1 (CB1R), has been reported to protect neurons in ischemic injury. We sought to investigate whether mitochondrial biogenesis was involved in the therapeutic effect of ACEA in cerebral ischemia. Focal cerebral ischemic injury was induced in adult male Sprague Dawley rats. Intraperitoneal injection of 1 mg/kg ACEA improved neurological behavior, reduced infarct volume, and inhibited apoptosis. The volume and numbers of mitochondria were significantly increased after ACEA administration. Expression of mitochondrial transcription factor A (Tfam), nuclear transcription factor-1 (Nrf-1), and cytochrome C oxidase subunit IV (COX IV) were also significantly up-regulated in animals administered ACEA. One thousand nanomoles of ACEA inhibited mitochondrial dysfunction in primary rat cortical neurons exposed to oxygen-glucose deprivation (OGD). Furthermore, ACEA administration increased phosphorylation of glycogen synthase kinase-3β (GSK-3β) after reperfusion. Phosphorylation of GSK-3β induced mitochondrial biogenesis and preserved mitochondrial function whereas inhibition of phosphatidylinositol 3-kinase (PI3K) dampened phosphorylation of GSK-3β and reversed induction of mitochondrial biogenesis and function following ACEA administration. In conclusion, ACEA could induce mitochondrial biogenesis and improve mitochondrial function at the beginning of cerebral ischemia, thus alleviating cerebral ischemia injury. Phosphorylation of GSK-3β might be involved in the regulation of mitochondrial biogenesis induced by ACEA.
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93
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Pharmacological Blockade of Cannabinoid CB1 Receptors in Diet-Induced Obesity Regulates Mitochondrial Dihydrolipoamide Dehydrogenase in Muscle. PLoS One 2015; 10:e0145244. [PMID: 26671069 PMCID: PMC4682857 DOI: 10.1371/journal.pone.0145244] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 11/30/2015] [Indexed: 01/19/2023] Open
Abstract
Cannabinoid CB1 receptors peripherally modulate energy metabolism. Here, we investigated the role of CB1 receptors in the expression of glucose/pyruvate/tricarboxylic acid (TCA) metabolism in rat abdominal muscle. Dihydrolipoamide dehydrogenase (DLD), a flavoprotein component (E3) of α-ketoacid dehydrogenase complexes with diaphorase activity in mitochondria, was specifically analyzed. After assessing the effectiveness of the CB1 receptor antagonist AM251 (3 mg kg-1, 14 days) on food intake and body weight, we could identified seven key enzymes from either glycolytic pathway or TCA cycle—regulated by both diet and CB1 receptor activity—through comprehensive proteomic approaches involving two-dimensional electrophoresis and MALDI-TOF/LC-ESI trap mass spectrometry. These enzymes were glucose 6-phosphate isomerase (GPI), triosephosphate isomerase (TPI), enolase (Eno3), lactate dehydrogenase (LDHa), glyoxalase-1 (Glo1) and the mitochondrial DLD, whose expressions were modified by AM251 in hypercaloric diet-induced obesity. Specifically, AM251 blocked high-carbohydrate diet (HCD)-induced expression of GPI, TPI, Eno3 and LDHa, suggesting a down-regulation of glucose/pyruvate/lactate pathways under glucose availability. AM251 reversed the HCD-inhibited expression of Glo1 and DLD in the muscle, and the DLD and CB1 receptor expression in the mitochondrial fraction. Interestingly, we identified the presence of CB1 receptors at the membrane of striate muscle mitochondria. DLD over-expression was confirmed in muscle of CB1-/- mice. AM251 increased the pyruvate dehydrogenase and glutathione reductase activity in C2C12 myotubes, and the diaphorase/oxidative activity in the mitochondria fraction. These results indicated an up-regulation of methylglyoxal and TCA cycle activity. Findings suggest that CB1 receptors in muscle modulate glucose/pyruvate/lactate pathways and mitochondrial oxidative activity by targeting DLD.
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94
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Mitochondrial degradation and energy metabolism. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:2812-21. [DOI: 10.1016/j.bbamcr.2015.05.010] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 04/23/2015] [Accepted: 05/07/2015] [Indexed: 12/14/2022]
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95
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Homedan C, Schmitt C, Laafi J, Gueguen N, Desquiret-Dumas V, Lenglet H, Karim Z, Gouya L, Deybach JC, Simard G, Puy H, Malthièry Y, Reynier P. Mitochondrial energetic defects in muscle and brain of a Hmbs-/- mouse model of acute intermittent porphyria. Hum Mol Genet 2015; 24:5015-23. [PMID: 26071363 DOI: 10.1093/hmg/ddv222] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 06/09/2015] [Indexed: 12/24/2022] Open
Abstract
Acute intermittent porphyria (AIP), an autosomal dominant metabolic disease (MIM #176000), is due to a deficiency of hydroxymethylbilane synthase (HMBS), which catalyzes the third step of the heme biosynthetic pathway. The clinical expression of the disease is mainly neurological, involving the autonomous, central and peripheral nervous systems. We explored mitochondrial oxidative phosphorylation (OXPHOS) in the brain and skeletal muscle of the Hmbs(-/-) mouse model first in the basal state (BS), and then after induction of the disease with phenobarbital and treatment with heme arginate (HA). The modification of the respiratory parameters, determined in mice in the BS, reflected a spontaneous metabolic energetic adaptation to HMBS deficiency. Phenobarbital induced a sharp alteration of the oxidative metabolism with a significant decrease of ATP production in skeletal muscle that was restored by treatment with HA. This OXPHOS defect was due to deficiencies in complexes I and II in the skeletal muscle whereas all four respiratory chain complexes were affected in the brain. To date, the pathogenesis of AIP has been mainly attributed to the neurotoxicity of aminolevulinic acid and heme deficiency. Our results show that mitochondrial energetic failure also plays an important role in the expression of the disease.
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Affiliation(s)
- Chadi Homedan
- UMR INSERM 1063, Département de Biochimie et Génétique and
| | - Caroline Schmitt
- Assistance Publique Hôpitaux de Paris, Centre Français des Porphyries, Hôpital Louis Mourier AP-HP, 178 rue des Renouillers, Colombes 92701, France, INSERM U1149, CNRS ERL 8252, Center for Research on Inflammation (CRI), Université Paris Diderot, site Bichat, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France and Laboratory of Excellence, GR-Ex, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France
| | | | - Naïg Gueguen
- Département de Biochimie et Génétique and UMR CNRS 6214 - INSERM 1083, Centre Hospitalier Universitaire, 4 rue Larrey, Angers 49933, France
| | - Valérie Desquiret-Dumas
- Département de Biochimie et Génétique and UMR CNRS 6214 - INSERM 1083, Centre Hospitalier Universitaire, 4 rue Larrey, Angers 49933, France
| | - Hugo Lenglet
- INSERM U1149, CNRS ERL 8252, Center for Research on Inflammation (CRI), Université Paris Diderot, site Bichat, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France and Laboratory of Excellence, GR-Ex, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France
| | - Zoubida Karim
- INSERM U1149, CNRS ERL 8252, Center for Research on Inflammation (CRI), Université Paris Diderot, site Bichat, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France and Laboratory of Excellence, GR-Ex, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France
| | - Laurent Gouya
- Assistance Publique Hôpitaux de Paris, Centre Français des Porphyries, Hôpital Louis Mourier AP-HP, 178 rue des Renouillers, Colombes 92701, France, INSERM U1149, CNRS ERL 8252, Center for Research on Inflammation (CRI), Université Paris Diderot, site Bichat, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France and Laboratory of Excellence, GR-Ex, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France
| | - Jean-Charles Deybach
- Assistance Publique Hôpitaux de Paris, Centre Français des Porphyries, Hôpital Louis Mourier AP-HP, 178 rue des Renouillers, Colombes 92701, France, INSERM U1149, CNRS ERL 8252, Center for Research on Inflammation (CRI), Université Paris Diderot, site Bichat, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France and Laboratory of Excellence, GR-Ex, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France
| | - Gilles Simard
- UMR INSERM 1063, Département de Biochimie et Génétique and
| | - Hervé Puy
- Assistance Publique Hôpitaux de Paris, Centre Français des Porphyries, Hôpital Louis Mourier AP-HP, 178 rue des Renouillers, Colombes 92701, France, INSERM U1149, CNRS ERL 8252, Center for Research on Inflammation (CRI), Université Paris Diderot, site Bichat, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France and Laboratory of Excellence, GR-Ex, Sorbonne Paris Cité, 16 rue Henri Huchard, Paris 75018, France
| | - Yves Malthièry
- UMR INSERM 1063, Département de Biochimie et Génétique and
| | - Pascal Reynier
- Département de Biochimie et Génétique and UMR CNRS 6214 - INSERM 1083, Centre Hospitalier Universitaire, 4 rue Larrey, Angers 49933, France,
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96
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Koliaki C, Szendroedi J, Kaul K, Jelenik T, Nowotny P, Jankowiak F, Herder C, Carstensen M, Krausch M, Knoefel WT, Schlensak M, Roden M. Adaptation of hepatic mitochondrial function in humans with non-alcoholic fatty liver is lost in steatohepatitis. Cell Metab 2015; 21:739-46. [PMID: 25955209 DOI: 10.1016/j.cmet.2015.04.004] [Citation(s) in RCA: 664] [Impact Index Per Article: 73.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 01/29/2015] [Accepted: 03/31/2015] [Indexed: 02/07/2023]
Abstract
The association of hepatic mitochondrial function with insulin resistance and non-alcoholic fatty liver (NAFL) or steatohepatitis (NASH) remains unclear. This study applied high-resolution respirometry to directly quantify mitochondrial respiration in liver biopsies of obese insulin-resistant humans without (n = 18) or with (n = 16) histologically proven NAFL or with NASH (n = 7) compared to lean individuals (n = 12). Despite similar mitochondrial content, obese humans with or without NAFL had 4.3- to 5.0-fold higher maximal respiration rates in isolated mitochondria than lean persons. NASH patients featured higher mitochondrial mass, but 31%-40% lower maximal respiration, which associated with greater hepatic insulin resistance, mitochondrial uncoupling, and leaking activity. In NASH, augmented hepatic oxidative stress (H2O2, lipid peroxides) and oxidative DNA damage (8-OH-deoxyguanosine) was paralleled by reduced anti-oxidant defense capacity and increased inflammatory response. These data suggest adaptation of the liver ("hepatic mitochondrial flexibility") at early stages of obesity-related insulin resistance, which is subsequently lost in NASH.
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Affiliation(s)
- Chrysi Koliaki
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany; Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, 40225, Düsseldorf, Germany
| | - Julia Szendroedi
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany; Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, 40225, Düsseldorf, Germany
| | - Kirti Kaul
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany
| | - Tomas Jelenik
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany
| | - Peter Nowotny
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany
| | - Frank Jankowiak
- Institute of Pathology, Heinrich Heine University, 40225, Düsseldorf, Germany
| | - Christian Herder
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany
| | - Maren Carstensen
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany
| | - Markus Krausch
- Department of General, Visceral and Pediatric Surgery, Heinrich Heine University, 40225, Düsseldorf, Germany
| | - Wolfram Trudo Knoefel
- Department of General, Visceral and Pediatric Surgery, Heinrich Heine University, 40225, Düsseldorf, Germany
| | - Matthias Schlensak
- General Surgery Department, St. Martinus Hospital, 40219, Düsseldorf, Germany
| | - Michael Roden
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225, Düsseldorf, Germany; German Center for Diabetes Research (DZD e.V.), 40225, Düsseldorf, Germany; Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University, 40225, Düsseldorf, Germany.
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97
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Soares JBRC, Gaviraghi A, Oliveira MF. Mitochondrial physiology in the major arbovirus vector Aedes aegypti: substrate preferences and sexual differences define respiratory capacity and superoxide production. PLoS One 2015; 10:e0120600. [PMID: 25803027 PMCID: PMC4372595 DOI: 10.1371/journal.pone.0120600] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 01/24/2015] [Indexed: 12/03/2022] Open
Abstract
Adult females of Aedes aegypti are facultative blood sucking insects and vectors of Dengue and yellow fever viruses. Insect dispersal plays a central role in disease transmission and the extremely high energy demand posed by flight is accomplished by a very efficient oxidative phosphorylation process, which take place within flight muscle mitochondria. These organelles play a central role in energy metabolism, interconnecting nutrient oxidation to ATP synthesis, but also represent an important site of cellular superoxide production. Given the importance of mitochondria to cell physiology, and the potential contributions of this organelle for A. aegypti biology and vectorial capacity, here, we conducted a systematic assessment of mitochondrial physiology in flight muscle of young adult A. aegypti fed exclusively with sugar. This was carried out by determining the activities of mitochondrial enzymes, the substrate preferences to sustain respiration, the mitochondrial bioenergetic efficiency and capacity, in both mitochondria-enriched preparations and mechanically permeabilized flight muscle in both sexes. We also determined the substrates preferences to promote mitochondrial superoxide generation and the main sites where it is produced within this organelle. We observed that respiration in A. aegypti mitochondria was essentially driven by complex I and glycerol 3 phosphate dehydrogenase substrates, which promoted distinct mitochondrial bioenergetic capacities, but with preserved efficiencies. Respiration mediated by proline oxidation in female mitochondria was strikingly higher than in males. Mitochondrial superoxide production was essentially mediated through proline and glycerol 3 phosphate oxidation, which took place at sites other than complex I. Finally, differences in mitochondrial superoxide production among sexes were only observed in male oxidizing glycerol 3 phosphate, exhibiting higher rates than in female. Together, these data represent a significant step towards the understanding of fundamental mitochondrial processes in A. aegypti, with potential implications for its physiology and vectorial capacity.
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Affiliation(s)
- Juliana B. R. Correa Soares
- Laboratório de Bioquímica de Resposta ao Estresse, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
- Laboratório de Inflamação e Metabolismo, Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem (INBEB), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Alessandro Gaviraghi
- Laboratório de Bioquímica de Resposta ao Estresse, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
- Laboratório de Inflamação e Metabolismo, Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem (INBEB), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcus F. Oliveira
- Laboratório de Bioquímica de Resposta ao Estresse, Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil
- Laboratório de Inflamação e Metabolismo, Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem (INBEB), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- * E-mail:
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98
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Hao XD, Chen P, Wang Y, Li SX, Xie LX. Mitochondrial DNA copy number, but not haplogroup is associated with keratoconus in Han Chinese population. Exp Eye Res 2015; 132:59-63. [PMID: 25613073 DOI: 10.1016/j.exer.2015.01.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 12/31/2014] [Accepted: 01/18/2015] [Indexed: 10/24/2022]
Abstract
Oxidative stress may play a role in the pathogenesis of keratoconus (KC). Mitochondrial DNA (mtDNA) is closely related to mitochondrion function, and variations may affect the generation of reactive oxygen species (ROS) and be involved in the pathogenesis of KC. To test whether mtDNA background and copy number confer genetic susceptibility to KC in the Han Chinese population, we performed this association study. We analyzed mtDNA sequence variations in 210 KC patients and 309 matched individuals from China, and classified each subject by haplogroup. Mitochondrial DNA copy number was measured in a subset of these subjects (193 patients and 103 controls). Comparison of matrilineal components of the cases and control populations revealed no significant difference. However, measurement of mtDNA copy number showed that KC patients had significantly lower mtDNA copy numbers than controls (P = 0.0002), even when age, gender, and mtDNA background were considered. Our results suggest that mtDNA copy number, but not haplogroup, is associated with keratoconus, and may contribute to its pathogenesis.
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Affiliation(s)
- Xiao-Dan Hao
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China.
| | - Peng Chen
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China.
| | - Ye Wang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China.
| | - Su-Xia Li
- Shandong Eye Hospital, Shandong Eye Institute, Shandong Academy of Medical Sciences, Jinan, China.
| | - Li-Xin Xie
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, China.
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99
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Rossignol R. Energy metabolism disorders in rare and common diseases. Toward bioenergetic modulation therapy and the training of a new generation of European scientists. Int J Biochem Cell Biol 2015; 63:2-9. [PMID: 25595463 DOI: 10.1016/j.biocel.2015.01.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Energy metabolism alterations are found in a large number of rare and common diseases of genetic or environmental origin. The number of patients that could benefit from bioenergetic modulation therapy (BIOMET) is therefore very important and includes individuals with pathologies as diverse as mitochondrial diseases, acute coronary syndrome, chronic kidney disease, asthma or even cancer. Although, the alteration of energy metabolism is disease specific and sometimes patient specific, the strategies for BIOMET could be common and target a series of bioenergetic regulatory mechanisms discussed in this article. An excellent training of scientists in the field of energy metabolism, related human diseases and drug discovery is also crucial to form a young generation of MDs, PHDs and Pharma or CRO-group leaders who will discover novel personalized bioenergetic medicines, through pharmacology, genetics, nutrition or adapted exercise training. The Mitochondrial European Educational Training (MEET) consortium was created to pursue this goal, and we dedicated here a special issue of Organelle in Focus (OiF) to highlight their objectives. A total of 10 OiFs articles constitute this Directed Issue on Mitochondrial Medicine. As part of this editorial article, we asked timely questions to the PR. Jan W. Smeitink, professor of Mitochondrial Medicine and CEO of Khondrion, a mitochondrial medicine company. He shared with us his objectives and strategies for the study of mitochondrial diseases and the identification of future treatments. This article is part of a Directed Issue entitled: Energy Metabolism Disorders and Therapies.
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Affiliation(s)
- Rodrigue Rossignol
- The International Journal of Biochemistry and Cell Biology, EA4576 MRGM, University of Bordeaux, CHU Pellegrin, Place Amélie-Raba Léon, 33076 Bordeaux Cedex, France.
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100
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Oxidative stress associated with neuronal apoptosis in experimental models of epilepsy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:293689. [PMID: 25614776 PMCID: PMC4295154 DOI: 10.1155/2014/293689] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 08/07/2014] [Indexed: 11/17/2022]
Abstract
Epilepsy is considered one of the most common neurological disorders worldwide. Oxidative stress produced by free radicals may play a role in the initiation and progression of epilepsy; the changes in the mitochondrial and the oxidative stress state can lead mechanism associated with neuronal death pathway. Bioenergetics state failure and impaired mitochondrial function include excessive free radical production with impaired synthesis of antioxidants. This review summarizes evidence that suggest what is the role of oxidative stress on induction of apoptosis in experimental models of epilepsy.
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