1
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Yoo Y, Yeon M, Kim WK, Shin HB, Lee SM, Yoon MS, Ro H, Seo YK. Age-dependent loss of Crls1 causes myopathy and skeletal muscle regeneration failure. Exp Mol Med 2024; 56:922-934. [PMID: 38556544 PMCID: PMC11059380 DOI: 10.1038/s12276-024-01199-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 04/02/2024] Open
Abstract
Skeletal muscle aging results in the gradual suppression of myogenesis, leading to muscle mass loss. However, the specific role of cardiolipin in myogenesis has not been determined. This study investigated the crucial role of mitochondrial cardiolipin and cardiolipin synthase 1 (Crls1) in age-related muscle deterioration and myogenesis. Our findings demonstrated that cardiolipin and Crls1 are downregulated in aged skeletal muscle. Moreover, the knockdown of Crls1 in myoblasts reduced mitochondrial mass, activity, and OXPHOS complex IV expression and disrupted the structure of the mitochondrial cristae. AAV9-shCrls1-mediated downregulation of Crls1 impaired muscle regeneration in a mouse model of cardiotoxin (CTX)-induced muscle damage, whereas AAV9-mCrls1-mediated Crls1 overexpression improved regeneration. Overall, our results highlight that the age-dependent decrease in CRLS1 expression contributes to muscle loss by diminishing mitochondrial quality in skeletal muscle myoblasts. Hence, modulating CRLS1 expression is a promising therapeutic strategy for mitigating muscle deterioration associated with aging, suggesting potential avenues for developing interventions to improve overall muscle health and quality of life in elderly individuals.
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Affiliation(s)
- Youngbum Yoo
- Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
- Department of Biological Sciences, College of Bioscience and Biotechnology, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - MyeongHoon Yeon
- Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Won-Kyung Kim
- Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
- Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, 34141, Korea
| | - Hyeon-Bin Shin
- Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
- Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, 34141, Korea
| | - Seung-Min Lee
- Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Mee-Sup Yoon
- Department of Molecular Medicine, College of Medicine, Gachon University College of Medicine, Incheon, 21999, Republic of Korea
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, 21999, Republic of Korea
| | - Hyunju Ro
- Department of Biological Sciences, College of Bioscience and Biotechnology, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Young-Kyo Seo
- Aging Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea.
- Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, 34141, Korea.
- School of Medicine, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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2
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Wang Y, Wang J, Tao SY, Liang Z, Xie R, Liu NN, Deng R, Zhang Y, Deng D, Jiang G. Mitochondrial damage-associated molecular patterns: A new insight into metabolic inflammation in type 2 diabetes mellitus. Diabetes Metab Res Rev 2024; 40:e3733. [PMID: 37823338 DOI: 10.1002/dmrr.3733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/18/2023] [Accepted: 09/08/2023] [Indexed: 10/13/2023]
Abstract
The pathogenesis of diabetes is accompanied by increased levels of inflammatory factors, also known as "metabolic inflammation", which runs through the whole process of the occurrence and development of the disease. Mitochondria, as the key site of glucose and lipid metabolism, is often accompanied by mitochondrial function damage in type 2 diabetes mellitus (T2DM). Damaged mitochondria release pro-inflammatory factors through damage-related molecular patterns that activate inflammation pathways and reactions to oxidative stress, further aggravate metabolic disorders, and form a vicious circle. Currently, the pathogenesis of diabetes is still unclear, and clinical treatment focuses primarily on symptomatic intervention of the internal environment of disorders of glucose and lipid metabolism with limited clinical efficacy. The proinflammatory effect of mitochondrial damage-associated molecular pattern (mtDAMP) in T2DM provides a new research direction for exploring the pathogenesis and intervention targets of T2DM. Therefore, this review covers the most recent findings on the molecular mechanism and related signalling cascades of inflammation caused by mtDAMP in T2DM and discusses its pathogenic role of it in the pathological process of T2DM to search potential intervention targets.
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Affiliation(s)
- Yan Wang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Jingwu Wang
- Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Si-Yu Tao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | | | - Rong Xie
- Xinjiang Medical University, Urumqi, China
| | - Nan-Nan Liu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Ruxue Deng
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yuelin Zhang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Deqiang Deng
- Department of Endocrinology, Urumqi Hospital of Traditional Chinese Medicine, Urumqi, China
| | - Guangjian Jiang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
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3
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Moon SH, Dilthey BG, Guan S, Sims HF, Pittman SK, Keith AL, Jenkins CM, Weihl CC, Gross RW. Genetic deletion of skeletal muscle iPLA 2γ results in mitochondrial dysfunction, muscle atrophy and alterations in whole-body energy metabolism. iScience 2023; 26:106895. [PMID: 37275531 PMCID: PMC10239068 DOI: 10.1016/j.isci.2023.106895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 02/28/2023] [Accepted: 05/12/2023] [Indexed: 06/07/2023] Open
Abstract
Skeletal muscle is the major site of glucose utilization in mammals integrating serum glucose clearance with mitochondrial respiration. To mechanistically elucidate the roles of iPLA2γ in skeletal muscle mitochondria, we generated a skeletal muscle-specific calcium-independent phospholipase A2γ knockout (SKMiPLA2γKO) mouse. Genetic ablation of skeletal muscle iPLA2γ resulted in pronounced muscle weakness, muscle atrophy, and increased blood lactate resulting from defects in mitochondrial function impairing metabolic processing of pyruvate and resultant bioenergetic inefficiency. Mitochondria from SKMiPLA2γKO mice were dysmorphic displaying marked changes in size, shape, and interfibrillar juxtaposition. Mitochondrial respirometry demonstrated a marked impairment in respiratory efficiency with decreases in the mass and function of oxidative phosphorylation complexes and cytochrome c. Further, a pronounced decrease in mitochondrial membrane potential and remodeling of cardiolipin molecular species were prominent. Collectively, these alterations prevented body weight gain during high-fat feeding through enhanced glucose disposal without efficient capture of chemical energy thereby altering whole-body bioenergetics.
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Affiliation(s)
- Sung Ho Moon
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Beverly Gibson Dilthey
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Shaoping Guan
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Harold F. Sims
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Sara K. Pittman
- Department of Neurology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Amy L. Keith
- Department of Neurology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Christopher M. Jenkins
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Conrad C. Weihl
- Department of Neurology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Richard W. Gross
- Division of Bioorganic Chemistry and Molecular Pharmacology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110, USA
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO 63110, USA
- Center for Cardiovascular Research, Washington University School of Medicine, Saint Louis, MO 63110, USA
- Department of Chemistry, Washington University, Saint Louis, MO 63130, USA
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4
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Galambo D, Bergdahl A. Physiological levels of cardiolipin acutely affect mitochondrial respiration in vascular smooth muscle cells. Curr Res Physiol 2022; 6:100097. [PMID: 36594049 PMCID: PMC9803913 DOI: 10.1016/j.crphys.2022.100097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 12/03/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
Cardiolipin (CL) is a phospholipid molecule found in the inner mitochondrial membrane, where it normally associates with and activates the respiratory complexes. Following myocardial infarction, CL gets released from necrotic cells, consequently affecting neighboring tissues. We have previously demonstrated that physiological concentrations of up to 100 μM CL diminish endothelial cell migration and angiogenic sprouting. Since CL is vital to cellular life, we hypothesized that this molecule may have considerable implications on vascular smooth muscle cells bioenergetics, a key phase in atherogenesis. We examined the acute effects of physiological concentrations of CL on oxidative phosphorylation in permeabilized mice aorta using high-resolution respirometry and a substrate-inhibitor titration protocol. We found that CL significantly lowers LEAK and maximal State 3 respiration. In addition, we found that the acceptor control ratio, representing the coupling between oxidation and phosphorylation, was significantly upregulated by CL. Our findings demonstrate that in situ mitochondrial respiration in permeabilized smooth muscle cells is attenuated when physiological concentrations of CL are applied acutely. This could provide a novel therapy to reduce their dedifferentiation and consequently atherogenesis.
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Affiliation(s)
- Deema Galambo
- Department of Biology, Concordia, Montreal, QC, Canada
| | - Andreas Bergdahl
- Department of Health, Kinesiology & Applied Physiology, Concordia University, Montreal, QC, Canada
- Corresponding author.
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5
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Bautista JS, Falabella M, Flannery PJ, Hanna MG, Heales SJ, Pope SA, Pitceathly RD. Advances in methods to analyse cardiolipin and their clinical applications. Trends Analyt Chem 2022; 157:116808. [PMID: 36751553 PMCID: PMC7614147 DOI: 10.1016/j.trac.2022.116808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Cardiolipin (CL) is a mitochondria-exclusive phospholipid, primarily localised within the inner mitochondrial membrane, that plays an essential role in mitochondrial architecture and function. Aberrant CL content, structure, and localisation have all been linked to impaired mitochondrial activity and are observed in the pathophysiology of cancer and neurological, cardiovascular, and metabolic disorders. The detection, quantification, and localisation of CL species is a valuable tool to investigate mitochondrial dysfunction and the pathophysiological mechanisms underpinning several human disorders. CL is measured using liquid chromatography, usually combined with mass spectrometry, mass spectrometry imaging, shotgun lipidomics, ion mobility spectrometry, fluorometry, and radiolabelling. This review summarises available methods to analyse CL, with a particular focus on modern mass spectrometry, and evaluates their advantages and limitations. We provide guidance aimed at selecting the most appropriate technique, or combination of techniques, when analysing CL in different model systems, and highlight the clinical contexts in which measuring CL is relevant.
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Affiliation(s)
- Javier S. Bautista
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Micol Falabella
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Padraig J. Flannery
- Neurometabolic Unit, The National Hospital for Neurology and Neurosurgery, London, UK,Neurogenetics Unit, Rare and Inherited Disease Laboratory, North Thames Genomic Laboratory Hub, London, UK
| | - Michael G. Hanna
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK,NHS Highly Specialised Service for Rare Mitochondrial Disorders, Queen Square Centre for Neuromuscular Diseases, The National Hospital for Neurology and Neurosurgery, London, UK
| | - Simon J.R. Heales
- Neurometabolic Unit, The National Hospital for Neurology and Neurosurgery, London, UK,NHS Highly Specialised Service for Rare Mitochondrial Disorders, Queen Square Centre for Neuromuscular Diseases, The National Hospital for Neurology and Neurosurgery, London, UK,Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Simon A.S. Pope
- Neurometabolic Unit, The National Hospital for Neurology and Neurosurgery, London, UK,Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Robert D.S. Pitceathly
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK,NHS Highly Specialised Service for Rare Mitochondrial Disorders, Queen Square Centre for Neuromuscular Diseases, The National Hospital for Neurology and Neurosurgery, London, UK, Corresponding author. Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London WC1N 3BG, UK. (R.D.S. Pitceathly)
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6
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Corey RA, Harrison N, Stansfeld PJ, Sansom MSP, Duncan AL. Cardiolipin, and not monolysocardiolipin, preferentially binds to the interface of complexes III and IV. Chem Sci 2022; 13:13489-13498. [PMID: 36507170 PMCID: PMC9682889 DOI: 10.1039/d2sc04072g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 10/25/2022] [Indexed: 12/15/2022] Open
Abstract
The mitochondrial electron transport chain comprises a series of protein complexes embedded in the inner mitochondrial membrane that generate a proton motive force via oxidative phosphorylation, ultimately generating ATP. These protein complexes can oligomerize to form larger structures called supercomplexes. Cardiolipin (CL), a conical lipid, unique within eukaryotes to the inner mitochondrial membrane, has proven essential in maintaining the stability and function of supercomplexes. Monolysocardiolipin (MLCL) is a CL variant that accumulates in people with Barth syndrome (BTHS). BTHS is caused by defects in CL biosynthesis and characterised by abnormal mitochondrial bioenergetics and destabilised supercomplexes. However, the mechanisms by which MLCL causes pathogenesis remain unclear. Here, multiscale molecular dynamics characterise the interactions of CL and MLCL with yeast and mammalian mitochondrial supercomplexes containing complex III (CIII) and complex IV (CIV). Coarse-grained simulations reveal that both CL and MLCL bind to sites at the interface between CIII and CIV of the supercomplex. Free energy perturbation calculations show that MLCL interaction is weaker than that of CL and suggest that interaction with CIV drives this difference. Atomistic contact analyses show that, although interaction with CIII is similar for CL and MLCL, CIV makes more contacts with CL than MLCL, demonstrating that CL is a more successful "glue" between the two complexes. Simulations of the human CIII2CIV supercomplex show that this interface site is maintained between species. Our study suggests that MLCL accumulation in people with BTHS disrupts supercomplex stability by formation of relatively weak interactions at the interface lipid binding site.
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Affiliation(s)
- Robin A Corey
- Department of Biochemistry, University of Oxford South Parks Road Oxford OX1 3QU UK
| | - Noah Harrison
- Department of Biochemistry, University of Oxford South Parks Road Oxford OX1 3QU UK
| | - Philllp J Stansfeld
- School of Life Sciences & Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Mark S P Sansom
- Department of Biochemistry, University of Oxford South Parks Road Oxford OX1 3QU UK
| | - Anna L Duncan
- Department of Biochemistry, University of Oxford South Parks Road Oxford OX1 3QU UK
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7
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Kan KT, Nelson MG, Grant CM, Hubbard SJ, Lu H. Understanding the Role of Yeast Yme1 in Mitochondrial Function Using Biochemical and Proteomics Analyses. Int J Mol Sci 2022; 23:ijms232213694. [PMID: 36430179 PMCID: PMC9694332 DOI: 10.3390/ijms232213694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/28/2022] [Accepted: 11/05/2022] [Indexed: 11/09/2022] Open
Abstract
Mitochondrial i-AAA proteinase Yme1 is a multifunctional protein that plays important roles in maintaining mitochondrial protein homeostasis and regulating biogenesis and function of mitochondrial proteins. However, due to the complex interplay of mitochondria and the multifunctional nature of Yme1, how Yme1 affects mitochondrial function and protein homeostasis is still poorly understood. In this study, we investigated how YME1 deletion affects yeast Saccharomyces cerevisiae growth, chronological life span, mitochondrial protein homeostasis and function, with a focus on the mitochondrial oxidative phosphorylation (OXPHOS) complexes. Our results show that whilst the YME1 deleted cells grow poorly under respiratory conditions, they grow similar to wild-type yeast under fermentative conditions. However, the chronological life span is impaired, indicating that Yme1 plays a key role in longevity. Using highly enriched mitochondrial extract and proteomic analysis, we show that the abundances of many mitochondrial proteins are altered by YME1 deletion. Several components of the respiratory chain complexes II, III, IV and V were significantly decreased, suggesting that Yme1 plays an important role in maintaining the level and function of complexes II-V. This result was confirmed using blue native-PAGE and in-solution-based enzyme activity assays. Taken together, this study shows that Yme1 plays an important role in the chronological life span and mitochondrial protein homeostasis and has deciphered its function in maintaining the activity of mitochondrial OXPHOS complexes.
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Affiliation(s)
| | | | | | | | - Hui Lu
- Correspondence: ; Tel.: +44-161-2751553; Fax: +44-161-3065201
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8
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Jurcau A, Ardelean AI. Oxidative Stress in Ischemia/Reperfusion Injuries following Acute Ischemic Stroke. Biomedicines 2022; 10:biomedicines10030574. [PMID: 35327376 PMCID: PMC8945353 DOI: 10.3390/biomedicines10030574] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 02/04/2023] Open
Abstract
Recanalization therapy is increasingly used in the treatment of acute ischemic stroke. However, in about one third of these patients, recanalization is followed by ischemia/reperfusion injuries, and clinically to worsening of the neurological status. Much research has focused on unraveling the involved mechanisms in order to prevent or efficiently treat these injuries. What we know so far is that oxidative stress and mitochondrial dysfunction are significantly involved in the pathogenesis of ischemia/reperfusion injury. However, despite promising results obtained in experimental research, clinical studies trying to interfere with the oxidative pathways have mostly failed. The current article discusses the main mechanisms leading to ischemia/reperfusion injuries, such as mitochondrial dysfunction, excitotoxicity, and oxidative stress, and reviews the clinical trials with antioxidant molecules highlighting recent developments and future strategies.
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Affiliation(s)
- Anamaria Jurcau
- Department of Psycho-Neurosciences and Rehabilitation, Faculty of Medicine and Pharmacy, University of Oradea, 410087 Oradea, Romania
- Department of Neurology, Clinical Municipal Hospital Oradea, Louis Pasteur Street nr 26, 410054 Oradea, Romania
- Correspondence: ; Tel.: +40-744-600-833
| | - Adriana Ioana Ardelean
- Department of Preclinical Sciences, Faculty of Medicine and Pharmacy, University of Oradea, Universitatii Street nr 1, 410087 Oradea, Romania;
- Department of Cardiology, Clinical Emergency County Hospital Oradea, Gh. Doja Street nr 65, 410169 Oradea, Romania
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9
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Diets Rich in Olive Oil, Palm Oil, or Lard Alter Mitochondrial Biogenesis and Mitochondrial Membrane Composition in Rat Liver. Biochem Res Int 2022; 2022:9394356. [PMID: 35237451 PMCID: PMC8885195 DOI: 10.1155/2022/9394356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 01/16/2022] [Accepted: 01/28/2022] [Indexed: 12/25/2022] Open
Abstract
Palm oil (crude or refined) and lard are rich in SFA, while olive oil is rich in polyunsaturated fatty acids. SFA are considered harmful to health, while polyunsaturated fatty acids are beneficial to health. The aim of this study was to determine the effect of diets rich in crude PO, refined PO, OO, or lard on the mitochondrial membrane, the activity of mitochondrial respiratory chain complexes, and mitochondrial biogenesis. This was an experimental study in male Wistar rats fed a diet containing 30% of each oil. Rats had free access to food and water. After being fed for 12 weeks, animals were sacrificed and liver mitochondria were collected. This collection was used to determine membrane potential and ROS production, membrane phospholipid and fatty acid composition, citrate synthase activity and respiratory chain complex, cardiolipin synthase protein expression, and expression of selected genes involved in mitochondrial biogenesis. We found that diets rich in olive oil, palm oil, or lard altered mitochondrial biogenesis by significantly decreasing Pgc1α gene expression and altered the fatty acid composition of rat liver mitochondrial membrane PL.
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10
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Ji J, Damschroder D, Bessert D, Lazcano P, Wessells R, Reynolds CA, Greenberg ML. NAD supplementation improves mitochondrial performance of cardiolipin mutants. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159094. [PMID: 35051613 PMCID: PMC8883178 DOI: 10.1016/j.bbalip.2021.159094] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/28/2021] [Accepted: 12/09/2021] [Indexed: 12/01/2022]
Abstract
Cardiolipin (CL) deficiency causes mitochondrial dysfunction and aberrant metabolism that are associated in humans with the severe disease Barth syndrome (BTHS). Several metabolic abnormalities are observed in BTHS patients and model systems, including decreased oxidative phosphorylation, reduced tricarboxylic acid (TCA) cycle flux, and accumulated lactate and D-β-hydroxybutyrate, which strongly suggests that nicotinamide adenine dinucleotide (NAD) redox metabolism may be altered in CL-deficient cells. In this study, we identified abnormal NAD+ metabolism in multiple BTHS model systems and demonstrate that supplementation of NAD+ precursors such as nicotinamide mononucleotide (NMN) improves mitochondrial function. Improved mitochondrial function in the Drosophila model was associated with restored exercise endurance, which suggests a potential therapeutic benefit of NAD+ precursor supplementation in the management of BTHS patients.
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Affiliation(s)
- Jiajia Ji
- Department of Biological Sciences, College of Liberal Arts and Sciences, Wayne State University, Detroit, MI, United States of America
| | - Deena Damschroder
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, United States of America
| | - Denise Bessert
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI, United States of America
| | - Pablo Lazcano
- Department of Biological Sciences, College of Liberal Arts and Sciences, Wayne State University, Detroit, MI, United States of America
| | - Robert Wessells
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, United States of America
| | - Christian A Reynolds
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI, United States of America.
| | - Miriam L Greenberg
- Department of Biological Sciences, College of Liberal Arts and Sciences, Wayne State University, Detroit, MI, United States of America.
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11
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Ji J, Greenberg ML. Cardiolipin function in the yeast S. cerevisiae and the lessons learned for Barth syndrome. J Inherit Metab Dis 2022; 45:60-71. [PMID: 34626131 PMCID: PMC8755574 DOI: 10.1002/jimd.12447] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/21/2021] [Accepted: 10/06/2021] [Indexed: 01/03/2023]
Abstract
Cardiolipin (CL) is the signature phospholipid (PL) of mitochondria and plays a pivotal role in mitochondrial and cellular function. Disruption of the CL remodeling gene tafazzin (TAZ) causes the severe genetic disorder Barth syndrome (BTHS). Our current understanding of the function of CL and the mechanism underlying the disease has greatly benefited from studies utilizing the powerful yeast model Saccharomyces cerevisiae. In this review, we discuss important findings on the function of CL and its remodeling from yeast studies and the implications of these findings for BTHS, highlighting the potential physiological modifiers that may contribute to the disparities in clinical presentation among BTHS patients.
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Affiliation(s)
- Jiajia Ji
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Miriam L Greenberg
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
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12
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Zeng J, Li Z, Jiang H, Wang X. Progress on photocatalytic semiconductor hybrids for bacterial inactivation. MATERIALS HORIZONS 2021; 8:2964-3008. [PMID: 34609391 DOI: 10.1039/d1mh00773d] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Due to its use of green and renewable energy and negligible bacterial resistance, photocatalytic bacterial inactivation is to be considered a promising sterilization process. Herein, we explore the relevant mechanisms of the photoinduced process on the active sites of semiconductors with an emphasis on the active sites of semiconductors, the photoexcited electron transfer, ROS-induced toxicity and interactions between semiconductors and bacteria. Pristine semiconductors such as metal oxides (TiO2 and ZnO) have been widely reported; however, they suffer some drawbacks such as narrow optical response and high photogenerated carrier recombination. Herein, some typical modification strategies will be discussed including noble metal doping, ion doping, hybrid heterojunctions and dye sensitization. Besides, the biosafety and biocompatibility issues of semiconductor materials are also considered for the evaluation of their potential for further biomedical applications. Furthermore, 2D materials have become promising candidates in recent years due to their wide optical response to NIR light, superior antibacterial activity and favorable biocompatibility. Besides, the current research limitations and challenges are illustrated to introduce the appealing directions and design considerations for the future development of photocatalytic semiconductors for antibacterial applications.
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Affiliation(s)
- Jiayu Zeng
- State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab), School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Ziming Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hui Jiang
- State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab), School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Xuemei Wang
- State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab), School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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13
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Kaliszewska A, Allison J, Martini M, Arias N. Improving Age-Related Cognitive Decline through Dietary Interventions Targeting Mitochondrial Dysfunction. Int J Mol Sci 2021; 22:ijms22073574. [PMID: 33808221 PMCID: PMC8036520 DOI: 10.3390/ijms22073574] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/24/2021] [Accepted: 03/25/2021] [Indexed: 12/13/2022] Open
Abstract
Aging is inevitable and it is one of the major contributors to cognitive decline. However, the mechanisms underlying age-related cognitive decline are still the object of extensive research. At the biological level, it is unknown how the aging brain is subjected to progressive oxidative stress and neuroinflammation which determine, among others, mitochondrial dysfunction. The link between mitochondrial dysfunction and cognitive impairment is becoming ever more clear by the presence of significant neurological disturbances in human mitochondrial diseases. Possibly, the most important lifestyle factor determining mitochondrial functioning is nutrition. Therefore, with the present work, we review the latest findings disclosing a link between nutrition, mitochondrial functioning and cognition, and pave new ways to counteract cognitive decline in late adulthood through diet.
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Affiliation(s)
- Aleksandra Kaliszewska
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, Denmark Hill, London SE5 8AF, UK; (A.K.); (J.A.)
| | - Joseph Allison
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, Denmark Hill, London SE5 8AF, UK; (A.K.); (J.A.)
| | - Matteo Martini
- Department of Psychology, University of East London, London E154LZ, UK;
| | - Natalia Arias
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, Denmark Hill, London SE5 8AF, UK; (A.K.); (J.A.)
- Instituto de Neurociencias del Principado de Asturias (INEUROPA), 33005 Oviedo, Spain
- Correspondence:
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14
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Koma R, Shibaguchi T, Pérez López C, Oka T, Jue T, Takakura H, Masuda K. Localization of myoglobin in mitochondria: implication in regulation of mitochondrial respiration in rat skeletal muscle. Physiol Rep 2021; 9:e14769. [PMID: 33650803 PMCID: PMC7923563 DOI: 10.14814/phy2.14769] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 02/01/2021] [Indexed: 11/24/2022] Open
Abstract
Mitochondria play a principal role in metabolism, and mitochondrial respiration is an important process for producing adenosine triphosphate. Recently, we showed the possibility that the muscle-specific protein myoglobin (Mb) interacts with mitochondrial complex IV to augment the respiration capacity in skeletal muscles. However, the precise mechanism for the Mb-mediated upregulation remains under debate. The aim of this study was to ascertain whether Mb is truly integrated into the mitochondria of skeletal muscle and to investigate the submitochondrial localization. Isolated mitochondria from rat gastrocnemius muscle were subjected to different proteinase K (PK) concentrations to digest proteins interacting with the outer membrane. Western blotting analysis revealed that the PK digested translocase of outer mitochondrial membrane 20 (Tom20), and the immunoreactivity of Tom20 decreased with the amount of PK used. However, the immunoreactivity of Mb with PK treatment was better preserved, indicating that Mb is integrated into the mitochondria of skeletal muscle. The mitochondrial protease protection assay experiments suggested that Mb localizes within the mitochondria in the inner membrane from the intermembrane space side. These results strongly suggest that Mb inside muscle mitochondria could be implicated in the regulation of mitochondrial respiration via complex IV.
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Affiliation(s)
- Rikuhide Koma
- Graduate School of Human and Socio‐Environmental StudiesKanazawa UniversityIshikawaJapan
| | | | | | - Toshihiko Oka
- Department of Life ScienceRikkyo UniversityTokyoJapan
| | - Thomas Jue
- Department of Biochemistry and Molecular MedicineUniversity of California DavisDavisCAUSA
| | - Hisashi Takakura
- Faculty of Health and Sports ScienceDoshisha UniversityKyotoJapan
| | - Kazumi Masuda
- Graduate School of Human and Socio‐Environmental StudiesKanazawa UniversityIshikawaJapan
- Faculty of Human SciencesKanazawa UniversityIshikawaJapan
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15
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Petit PX, Ardilla-Osorio H, Penalvia L, Nathan E. R. Tafazzin Mutation Affecting Cardiolipin Leads to Increased Mitochondrial Superoxide Anions and Mitophagy Inhibition in Barth Syndrome. Cells 2020; 9:cells9102333. [PMID: 33096711 PMCID: PMC7589545 DOI: 10.3390/cells9102333] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 01/01/2023] Open
Abstract
Tafazzin is a phospholipid transacylase that catalyzes the remodeling of cardiolipin, a mitochondrial phospholipid required for oxidative phosphorylation. Mutations of the tafazzin gene cause Barth syndrome, which is characterized by mitochondrial dysfunction and dilated cardiomyopathy, leading to premature death. However, the molecular mechanisms underlying the cause of mitochondrial dysfunction in Barth syndrome remain poorly understood. We again highlight the fact that the tafazzin deficiency is also linked to defective oxidative phosphorylation associated with oxidative stress. All the mitochondrial events are positioned in a context where mitophagy is a key element in mitochondrial quality control. Here, we investigated the role of tafazzin in mitochondrial homeostasis dysregulation and mitophagy alteration. Using a HeLa cell model of tafazzin deficiency, we show that dysregulation of tafazzin in HeLa cells induces alteration of mitophagy. Our findings provide some additional insights into mitochondrial dysfunction associated with Barth syndrome, but also show that mitophagy inhibition is concomitant with apoptosis dysfunction through the inability of abnormal mitochondrial cardiolipin to assume its role in cytoplasmic signal transduction. Our work raises hope that pharmacological manipulation of the mitophagic pathway together with mitochondrially targeted antioxidants may provide new insights leading to promising treatment for these highly lethal conditions.
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Affiliation(s)
- Patrice X. Petit
- SSPIN Saints-Pères Paris Institut de Neurosciences, CNRS UMR 8003, “Mitochondria, Apoptosis and Autophagy Signalling” Université de Paris—Campus Saint-Germain, 45 rue des Saints-Pères, 75006 Paris, France; (L.P.); (R.N.E.)
- Correspondence: or ; Tel.: +33(0)6-78-24-80-87
| | - Hector Ardilla-Osorio
- Laboratoire Cellules Souches et Prions, INSERM-S 1124, Université de Paris—Campus Saint-Germain, 45 rue des Saints Pères, 75006 Paris, France;
| | - Lucile Penalvia
- SSPIN Saints-Pères Paris Institut de Neurosciences, CNRS UMR 8003, “Mitochondria, Apoptosis and Autophagy Signalling” Université de Paris—Campus Saint-Germain, 45 rue des Saints-Pères, 75006 Paris, France; (L.P.); (R.N.E.)
| | - Rainey Nathan E.
- SSPIN Saints-Pères Paris Institut de Neurosciences, CNRS UMR 8003, “Mitochondria, Apoptosis and Autophagy Signalling” Université de Paris—Campus Saint-Germain, 45 rue des Saints-Pères, 75006 Paris, France; (L.P.); (R.N.E.)
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16
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Zichri SB, Kolusheva S, Shames AI, Schneiderman EA, Poggio JL, Stein DE, Doubijensky E, Levy D, Orynbayeva Z, Jelinek R. Mitochondria membrane transformations in colon and prostate cancer and their biological implications. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1863:183471. [PMID: 32931774 DOI: 10.1016/j.bbamem.2020.183471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 01/05/2023]
Abstract
Mitochondria have emerged as important determinants in cancer progression and malignancy. However, the role of mitochondrial membranes in cancer onset and progression has not been thoroughly investigated. This study compares the structural and functional properties of mitochondrial membranes in prostate and colon cancer cells in comparison to normal mitochondria, and possible therapeutic implications of these membrane changes. Specifically, isolation of cell mitochondria and preparation of inverted sub-mitochondrial particles (SMPs) illuminated significant cancer-induced modulations of membrane lipid compositions, fluidity, and activity of cytochrome c oxidase, one of the key mitochondrial enzymes. The experimental data further show that cancer-associated membrane transformations may account for mitochondria targeting by betulinic acid and resveratrol, known anti-cancer molecules. Overall, this study probes the relationship between cancer and mitochondrial membrane transformations, underlying a potential therapeutic significance for mitochondrial membrane targeting in cancer.
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Affiliation(s)
- Shani Ben Zichri
- Department of Chemistry, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Sofiya Kolusheva
- Ilze Katz Center for Nanotechnology, Ben-Gurion University, Beer-Sheva 84105, Israel
| | | | - Elina Abaev Schneiderman
- Department of Microbiology, Immunology and Genetics, Faculty for Health Sciences, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Juan L Poggio
- Department of Surgery, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - David E Stein
- Department of Surgery, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - Elena Doubijensky
- Ilze Katz Center for Nanotechnology, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Dan Levy
- Department of Microbiology, Immunology and Genetics, Faculty for Health Sciences, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Zulfiya Orynbayeva
- Department of Surgery, Drexel University College of Medicine, Philadelphia, PA 19102, USA.
| | - Raz Jelinek
- Department of Chemistry, Ben-Gurion University, Beer-Sheva 84105, Israel; Ilze Katz Center for Nanotechnology, Ben-Gurion University, Beer-Sheva 84105, Israel.
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17
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Li Y, Lou W, Grevel A, Böttinger L, Liang Z, Ji J, Patil VA, Liu J, Ye C, Hüttemann M, Becker T, Greenberg ML. Cardiolipin-deficient cells have decreased levels of the iron-sulfur biogenesis protein frataxin. J Biol Chem 2020; 295:11928-11937. [PMID: 32636300 PMCID: PMC7450130 DOI: 10.1074/jbc.ra120.013960] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/02/2020] [Indexed: 12/12/2022] Open
Abstract
Cardiolipin (CL) is the signature phospholipid of mitochondrial membranes, where it is synthesized locally and plays an important role in mitochondrial bioenergetics. Previous studies in the yeast model have indicated that CL is required for optimal iron homeostasis, which is disrupted by a mechanism not yet determined in the yeast CL mutant, crd1Δ. This finding has implications for the severe genetic disorder, Barth syndrome (BTHS), in which CL metabolism is perturbed because of mutations in the CL-remodeling enzyme, tafazzin. Here, we investigate the effects of tafazzin deficiency on iron homeostasis in the mouse myoblast model of BTHS tafazzin knockout (TAZ-KO) cells. Similarly to CL-deficient yeast cells, TAZ-KO cells exhibited elevated sensitivity to iron, as well as to H2O2, which was alleviated by the iron chelator deferoxamine. TAZ-KO cells exhibited increased expression of the iron exporter ferroportin and decreased expression of the iron importer transferrin receptor, likely reflecting a regulatory response to elevated mitochondrial iron. Reduced activities of mitochondrial iron-sulfur cluster enzymes suggested that the mechanism underlying perturbation of iron homeostasis was defective iron-sulfur biogenesis. We observed decreased levels of Yfh1/frataxin, an essential component of the iron-sulfur biogenesis machinery, in mitochondria from TAZ-KO mouse cells and in CL-deleted yeast crd1Δ cells, indicating that the role of CL in iron-sulfur biogenesis is highly conserved. Yeast crd1Δ cells exhibited decreased processing of the Yfh1 precursor upon import, which likely contributes to the iron homeostasis defects. Implications for understanding the pathogenesis of BTHS are discussed.
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Affiliation(s)
- Yiran Li
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Wenjia Lou
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Alexander Grevel
- Institute for Biochemistry and Molecular Biology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Lena Böttinger
- Institute for Biochemistry and Molecular Biology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Zhuqing Liang
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Jiajia Ji
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Vinay A Patil
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Jenney Liu
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Cunqi Ye
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
| | - Maik Hüttemann
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Thomas Becker
- Institute for Biochemistry and Molecular Biology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- CIBSS Centre for Integrative Biological Signaling Studies, University of Freiburg, Freiburg, Germany
- Institute of Biochemistry and Molecular Biology, Faculty of Medicine, University of Bonn, Bonn, Germany
| | - Miriam L Greenberg
- Department of Biological Sciences, Wayne State University, Detroit, Michigan, USA
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18
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Le CH, Benage LG, Specht KS, Li Puma LC, Mulligan CM, Heuberger AL, Prenni JE, Claypool SM, Chatfield KC, Sparagna GC, Chicco AJ. Tafazzin deficiency impairs CoA-dependent oxidative metabolism in cardiac mitochondria. J Biol Chem 2020; 295:12485-12497. [PMID: 32665401 DOI: 10.1074/jbc.ra119.011229] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 07/07/2020] [Indexed: 12/20/2022] Open
Abstract
Barth syndrome is a mitochondrial myopathy resulting from mutations in the tafazzin (TAZ) gene encoding a phospholipid transacylase required for cardiolipin remodeling. Cardiolipin is a phospholipid of the inner mitochondrial membrane essential for the function of numerous mitochondrial proteins and processes. However, it is unclear how tafazzin deficiency impacts cardiac mitochondrial metabolism. To address this question while avoiding confounding effects of cardiomyopathy on mitochondrial phenotype, we utilized Taz-shRNA knockdown (TazKD ) mice, which exhibit defective cardiolipin remodeling and respiratory supercomplex instability characteristic of human Barth syndrome but normal cardiac function into adulthood. Consistent with previous reports from other models, mitochondrial H2O2 emission and oxidative damage were greater in TazKD than in wild-type (WT) hearts, but there were no differences in oxidative phosphorylation coupling efficiency or membrane potential. Fatty acid and pyruvate oxidation capacities were 40-60% lower in TazKD mitochondria, but an up-regulation of glutamate oxidation supported respiration rates approximating those with pyruvate and palmitoylcarnitine in WT. Deficiencies in mitochondrial CoA and shifts in the cardiac acyl-CoA profile paralleled changes in fatty acid oxidation enzymes and acyl-CoA thioesterases, suggesting limitations of CoA availability or "trapping" in TazKD mitochondrial metabolism. Incubation of TazKD mitochondria with exogenous CoA partially rescued pyruvate and palmitoylcarnitine oxidation capacities, implicating dysregulation of CoA-dependent intermediary metabolism rather than respiratory chain defects in the bioenergetic impacts of tafazzin deficiency. These findings support links among cardiolipin abnormalities, respiratory supercomplex instability, and mitochondrial oxidant production and shed new light on the distinct metabolic consequences of tafazzin deficiency in the mammalian heart.
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Affiliation(s)
- Catherine H Le
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado, USA
| | - Lindsay G Benage
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, Colorado, USA
| | - Kalyn S Specht
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Lance C Li Puma
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Christopher M Mulligan
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Adam L Heuberger
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, Colorado, USA
| | - Jessica E Prenni
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, Colorado, USA
| | - Steven M Claypool
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kathryn C Chatfield
- Department of Pediatrics, University of Colorado School of Medicine, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Genevieve C Sparagna
- Division of Cardiology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Adam J Chicco
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado, USA .,Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA.,Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
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19
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Chavez JD, Tang X, Campbell MD, Reyes G, Kramer PA, Stuppard R, Keller A, Zhang H, Rabinovitch PS, Marcinek DJ, Bruce JE. Mitochondrial protein interaction landscape of SS-31. Proc Natl Acad Sci U S A 2020; 117:15363-15373. [PMID: 32554501 PMCID: PMC7334473 DOI: 10.1073/pnas.2002250117] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Mitochondrial dysfunction underlies the etiology of a broad spectrum of diseases including heart disease, cancer, neurodegenerative diseases, and the general aging process. Therapeutics that restore healthy mitochondrial function hold promise for treatment of these conditions. The synthetic tetrapeptide, elamipretide (SS-31), improves mitochondrial function, but mechanistic details of its pharmacological effects are unknown. Reportedly, SS-31 primarily interacts with the phospholipid cardiolipin in the inner mitochondrial membrane. Here we utilize chemical cross-linking with mass spectrometry to identify protein interactors of SS-31 in mitochondria. The SS-31-interacting proteins, all known cardiolipin binders, fall into two groups, those involved in ATP production through the oxidative phosphorylation pathway and those involved in 2-oxoglutarate metabolic processes. Residues cross-linked with SS-31 reveal binding regions that in many cases, are proximal to cardiolipin-protein interacting regions. These results offer a glimpse of the protein interaction landscape of SS-31 and provide mechanistic insight relevant to SS-31 mitochondrial therapy.
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Affiliation(s)
- Juan D Chavez
- Department of Genome Sciences, University of Washington, Seattle, WA 98105
| | - Xiaoting Tang
- Department of Genome Sciences, University of Washington, Seattle, WA 98105
| | | | - Gustavo Reyes
- Department of Radiology, University of Washington, Seattle, WA 98105
| | - Philip A Kramer
- Department of Radiology, University of Washington, Seattle, WA 98105
| | - Rudy Stuppard
- Department of Radiology, University of Washington, Seattle, WA 98105
| | - Andrew Keller
- Department of Genome Sciences, University of Washington, Seattle, WA 98105
| | - Huiliang Zhang
- Department of Pathology, University of Washington, Seattle, WA 98195
| | | | - David J Marcinek
- Department of Radiology, University of Washington, Seattle, WA 98105
| | - James E Bruce
- Department of Genome Sciences, University of Washington, Seattle, WA 98105;
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20
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Incidence of Antithrombin Deficiency and Anti-Cardiolipin Antibodies After Severe Traumatic Brain Injury: A Prospective Cohort Study. Neurocrit Care 2020; 34:227-235. [PMID: 32557110 DOI: 10.1007/s12028-020-01026-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND Animal studies suggested that cerebral mitochondrial cardiolipin phospholipids were released after severe traumatic brain injury (TBI), contributing to the pathogenesis of thromboembolism. OBJECTIVES To determine the incidence of anti-cardiolipin antibodies after severe TBI and whether this was related to the severity of TBI and development of venous thromboembolism. METHODS Serial anti-cardiolipin antibodies, antithrombin levels, viscoelastic testing, and coagulation parameters were measured on admission, day-1, and between day-5 and day-7 in patients with severe TBI requiring intracranial pressure monitoring. RESULTS Of the 40 patients included (85% male and median age 42 years), 7 (18%) had a raised Ig-G or Ig-M anti-cardiolipin antibody titer after TBI. Antithrombin levels were below the normal level-especially on day-0 and day-1-in 15 patients (38%), and 14 patients (38%) developed an increase in maximum clot firmness on the viscoelastic test in conjunction with elevations in fibrinogen concentration and platelet count. Four patients (10%) developed deep vein thrombosis, and 10 patients (25%) died, both of which were not significantly related to the presence of anti-cardiolipin antibodies (P = 0.619 and P = 0.638, respectively). CONCLUSIONS A reduction in antithrombin level and development of anti-cardiolipin antibodies were not rare immediately after severe TBI; these abnormalities were followed by an increase in in vitro clot strength due to elevations in fibrinogen concentration and platelet count. The quantitative relationships between the development of anti-cardiolipin antibodies and severity of TBI or clinical thromboembolic events deserve further investigation.
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21
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Ferrington DA, Fisher CR, Kowluru RA. Mitochondrial Defects Drive Degenerative Retinal Diseases. Trends Mol Med 2020; 26:105-118. [PMID: 31771932 PMCID: PMC6938541 DOI: 10.1016/j.molmed.2019.10.008] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/16/2019] [Accepted: 10/23/2019] [Indexed: 01/08/2023]
Abstract
Mitochondrial dysfunction is involved in the pathology of two major blinding retinal diseases, diabetic retinopathy (DR) and age-related macular degeneration (AMD). These diseases accumulate mitochondrial defects in distinct retinal subcellular structures, the vascular/neural network in DR and the retinal pigment epithelium (RPE) in AMD. These mitochondrial defects cause a metabolic crisis that drives disease. With no treatments to stop these diseases, coupled with an increasing population suffering from AMD and DR, there is an urgent need to develop new therapeutics targeting the mitochondria to prevent or reverse disease-specific pathology.
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Affiliation(s)
- Deborah A Ferrington
- Department of Ophthalmology and Visual Neurosciences and Graduate Program in Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA.
| | - Cody R Fisher
- Department of Ophthalmology and Visual Neurosciences and Graduate Program in Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Renu A Kowluru
- Ophthalmology, Vision, and Anatomical Sciences, Wayne State University, Detroit, MI, USA.
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22
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Varela-López A, Battino M, Navarro-Hortal MD, Giampieri F, Forbes-Hernández TY, Romero-Márquez JM, Collado R, Quiles JL. An update on the mechanisms related to cell death and toxicity of doxorubicin and the protective role of nutrients. Food Chem Toxicol 2019; 134:110834. [PMID: 31577924 DOI: 10.1016/j.fct.2019.110834] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/10/2019] [Accepted: 09/21/2019] [Indexed: 12/11/2022]
Abstract
Doxorubicin (DOX), is a very effective chemotherapeutic agent against cancer whose clinical use is limited by toxicity. Different strategies have been proposed to attenuate toxicity, including combined therapy with bioactive compounds. This review update mechanisms of action and toxicity of doxorubicin and the role of nutrients like vitamins (A, C, E), minerals (selenium) and n-3 polyunsaturated fatty acids. Protective activities against DOX toxicity in liver, kidney, skin, bone marrow, testicles or brain have been reported, but these have not been evaluated for all of the reviewed nutrients. In most cases oxidation-related effects were present either, by reducing ROS levels and/or increasing antioxidant defenses. Antiapoptotic and anti-inflammatory mechanisms are also commonly reported. In some cases, interferences with autophagy and calcium homeostasis also have shown to be affected. Notwithstanding, there is a wide variety in duration and doses of treatment tested for both, compounds and DOX, which make difficult to compare the results of the studies. In spite of the reduction of DOX cardiotoxicity in health models, DOX anti-cancer activity in cancer cell lines or xenograft models usually did not result compromised when this has been evaluated. Importantly, clinical studies are needed to confirm all the observed effects.
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Affiliation(s)
- Alfonso Varela-López
- Department of Physiology, Institute of Nutrition and Food Technology ''José Mataix", Biomedical Research Centre, University of Granada, 18071, Granada, Spain
| | - Maurizio Battino
- Dipartimento di Scienze Cliniche Specialistiche Ed Odontostomatologiche (DISCO)-Sez, Biochimica, Facoltà di Medicina, Università Politecnica Delle Marche, 60131, Ancona, Italy; Nutrition and Food Science Group. Department of Analytical and Food Chemistry, CITACA, CACTI, University of Vigo, Vigo, Spain; International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang, China
| | - María D Navarro-Hortal
- Department of Physiology, Institute of Nutrition and Food Technology ''José Mataix", Biomedical Research Centre, University of Granada, 18071, Granada, Spain
| | - Francesca Giampieri
- Dipartimento di Scienze Cliniche Specialistiche Ed Odontostomatologiche (DISCO)-Sez, Biochimica, Facoltà di Medicina, Università Politecnica Delle Marche, 60131, Ancona, Italy
| | - Tamara Y Forbes-Hernández
- Nutrition and Food Science Group. Department of Analytical and Food Chemistry, CITACA, CACTI, University of Vigo, Vigo, Spain
| | - José M Romero-Márquez
- Department of Physiology, Institute of Nutrition and Food Technology ''José Mataix", Biomedical Research Centre, University of Granada, 18071, Granada, Spain
| | - Ricardo Collado
- Complejo Hospitalario Universitario de Cáceres, Cáceres, Spain
| | - José L Quiles
- Department of Physiology, Institute of Nutrition and Food Technology ''José Mataix", Biomedical Research Centre, University of Granada, 18071, Granada, Spain.
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23
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The role of cardiolipin concentration and acyl chain composition on mitochondrial inner membrane molecular organization and function. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1039-1052. [PMID: 30951877 DOI: 10.1016/j.bbalip.2019.03.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/19/2019] [Accepted: 03/30/2019] [Indexed: 12/28/2022]
Abstract
Cardiolipin (CL) is a key phospholipid of the mitochondria. A loss of CL content and remodeling of CL's acyl chains is observed in several pathologies. Strong shifts in CL concentration and acyl chain composition would presumably disrupt mitochondrial inner membrane biophysical organization. However, it remains unclear in the literature as to which is the key regulator of mitochondrial membrane biophysical properties. We review the literature to discriminate the effects of CL concentration and acyl chain composition on mitochondrial membrane organization. A widely applicable theme emerges across several pathologies, including cardiovascular diseases, diabetes, Barth syndrome, and neurodegenerative ailments. The loss of CL, often accompanied by increased levels of lyso-CLs, impairs mitochondrial inner membrane organization. Modest remodeling of CL acyl chains is not a major driver of impairments and only in cases of extreme remodeling is there an influence on membrane properties.
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24
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Challenges and Adaptations of Life in Alkaline Habitats. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 172:85-133. [DOI: 10.1007/10_2019_97] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Malkamäki A, Sharma V. Atomistic insights into cardiolipin binding sites of cytochrome c oxidase. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2018; 1860:224-232. [PMID: 30414931 DOI: 10.1016/j.bbabio.2018.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/21/2018] [Accepted: 11/07/2018] [Indexed: 11/19/2022]
Abstract
Mitochondrial cytochrome c oxidase couples the reduction of oxygen to proton pumping. Despite an overall good understanding of its molecular mechanism, the role of cardiolipin in protein function is not understood. Here, we have studied the cardiolipin-protein interactions in a dynamic context by means of atomistic molecular dynamics simulations performed on the entire structure of monomeric and dimeric forms of the enzyme. Several microseconds of simulation data reveal that the crystallographic cardiolipin molecules that glue two monomers together bind weakly in hybrid and single-component lipid bilayers and dissociate rapidly. Atomistic simulations performed in the absence of tightly bound cardiolipin molecules strongly perturb the structural integrity of subunits III and VIIa, thereby highlighting an indispensable nature of lipid-protein interactions in enzyme function such as proton uptake and oxygen channeling. Our results demonstrate the strength of molecular simulations in providing direct atomic description of lipid-protein processes that are difficult to achieve experimentally.
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Affiliation(s)
- Aapo Malkamäki
- Department of Physics, P. O. Box 64, University of Helsinki, Helsinki 00014, Finland
| | - Vivek Sharma
- Department of Physics, P. O. Box 64, University of Helsinki, Helsinki 00014, Finland; Institute of Biotechnology, P. O. Box 56, University of Helsinki, Helsinki 00014, Finland.
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26
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Pichler H, Emmerstorfer-Augustin A. Modification of membrane lipid compositions in single-celled organisms – From basics to applications. Methods 2018; 147:50-65. [DOI: 10.1016/j.ymeth.2018.06.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/18/2018] [Accepted: 06/16/2018] [Indexed: 12/12/2022] Open
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27
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Wu HY, Huang CH, Lin YH, Wang CC, Jan TR. Cannabidiol induced apoptosis in human monocytes through mitochondrial permeability transition pore-mediated ROS production. Free Radic Biol Med 2018; 124:311-318. [PMID: 29940353 DOI: 10.1016/j.freeradbiomed.2018.06.023] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 01/08/2023]
Abstract
Cannabidiol (CBD) has been reported to induce apoptosis in immune cells through oxidative stress-related mechanisms. The objective of the present study was to investigate the cellular mechanisms for CBD-induced apoptosis and oxidative stress in human monocytes. Exposure of freshly isolated human monocytes to CBD induced apoptosis in a time- and concentration-dependent manner. Time-course analyses revealed the induction of intracellular reactive oxygen species (ROS) at 1-2 h post CBD (16 μM) exposure. By comparison, the CBD treatment rapidly elicited the depolarization of mitochondrial membrane potential (MMP) within 5 min, and the oxidation of cardiolipin, a major lipid component of the mitochondrial inner membrane, within 15 min. Moreover, CBD induced the release of cytochrome c (Cyt c) from mitochondria. Mechanistic studies revealed that CBD-induced ROS production and apoptosis were not associated with the alteration of mitochondrial superoxide dismutase activity, the electron leakage through mitochondrial respiratory chain, and Fe2+- and Ca2+-mediated mechanisms. In contrast, CBD-induced apoptosis and MMP depolarization were markedly attenuated by the mitochondrial permeability transition pore (MPTP) inhibitor cyclosporin A (CsA), but not the calcineurin inhibitor FK506. Furthermore, CsA prevented cardiolipin oxidation and the MPTP opening induced by CBD. The present study suggests that CBD acts on the mitochondria to elicit ROS generation and apoptosis through MPTP opening and provides critical insights into the cellular mechanisms for CBD-induced oxidative stress in apoptotic monocytes.
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Affiliation(s)
- Hsin-Ying Wu
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan; Laboratory Animal Center, National Health Research Institutes, Miaoli, Taiwan
| | - Chung-Hsiung Huang
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan; National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Yi-Hsuan Lin
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
| | - Chia-Chi Wang
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tong-Rong Jan
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan.
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28
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Sullivan EM, Pennington ER, Green WD, Beck MA, Brown DA, Shaikh SR. Mechanisms by Which Dietary Fatty Acids Regulate Mitochondrial Structure-Function in Health and Disease. Adv Nutr 2018; 9:247-262. [PMID: 29767698 PMCID: PMC5952932 DOI: 10.1093/advances/nmy007] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/02/2018] [Accepted: 01/30/2018] [Indexed: 02/06/2023] Open
Abstract
Mitochondria are the energy-producing organelles within a cell. Furthermore, mitochondria have a role in maintaining cellular homeostasis and proper calcium concentrations, building critical components of hormones and other signaling molecules, and controlling apoptosis. Structurally, mitochondria are unique because they have 2 membranes that allow for compartmentalization. The composition and molecular organization of these membranes are crucial to the maintenance and function of mitochondria. In this review, we first present a general overview of mitochondrial membrane biochemistry and biophysics followed by the role of different dietary saturated and unsaturated fatty acids in modulating mitochondrial membrane structure-function. We focus extensively on long-chain n-3 (ω-3) polyunsaturated fatty acids and their underlying mechanisms of action. Finally, we discuss implications of understanding molecular mechanisms by which dietary n-3 fatty acids target mitochondrial structure-function in metabolic diseases such as obesity, cardiac-ischemia reperfusion injury, obesity, type 2 diabetes, nonalcoholic fatty liver disease, and select cancers.
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Affiliation(s)
- E Madison Sullivan
- Department of Biochemistry and Molecular Biology and
- East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, NC
| | - Edward Ross Pennington
- Department of Biochemistry and Molecular Biology and
- East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, NC
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
| | - William D Green
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
| | - Melinda A Beck
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
| | - David A Brown
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech Corporate Research Center, Blacksburg, VA
| | - Saame Raza Shaikh
- Department of Nutrition, The University of North Carolina at Chapel Hill, Gillings School of Global Public Health and School of Medicine, Chapel Hill, NC
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29
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Koleini N, Kardami E. Autophagy and mitophagy in the context of doxorubicin-induced cardiotoxicity. Oncotarget 2018; 8:46663-46680. [PMID: 28445146 PMCID: PMC5542301 DOI: 10.18632/oncotarget.16944] [Citation(s) in RCA: 184] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 03/17/2017] [Indexed: 12/18/2022] Open
Abstract
Doxorubicin (Dox) is a cytotoxic drug widely incorporated in various chemotherapy protocols. Severe side effects such as cardiotoxicity, however, limit Dox application. Mechanisms by which Dox promotes cardiac damage and cardiomyocyte cell death have been investigated extensively, but a definitive picture has yet to emerge. Autophagy, regarded generally as a protective mechanism that maintains cell viability by recycling unwanted and damaged cellular constituents, is nevertheless subject to dysregulation having detrimental effects for the cell. Autophagic cell death has been described, and has been proposed to contribute to Dox-cardiotoxicity. Additionally, mitophagy, autophagic removal of damaged mitochondria, is affected by Dox in a manner contributing to toxicity. Here we will review Dox-induced cardiotoxicity and cell death in the broad context of the autophagy and mitophagy processes.
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Affiliation(s)
- Navid Koleini
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada.,Department of Physiology and Pathophysiology, Winnipeg, Manitoba, Canada
| | - Elissavet Kardami
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada.,Department of Physiology and Pathophysiology, Winnipeg, Manitoba, Canada.,Department of Human Anatomy and Cell Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
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30
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de Taffin de Tilques M, Lasserre JP, Godard F, Sardin E, Bouhier M, Le Guedard M, Kucharczyk R, Petit PX, Testet E, di Rago JP, Tribouillard-Tanvier D. Decreasing cytosolic translation is beneficial to yeast and human Tafazzin-deficient cells. ACTA ACUST UNITED AC 2018; 5:220-232. [PMID: 29796387 PMCID: PMC5961916 DOI: 10.15698/mic2018.05.629] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Cardiolipin (CL) optimizes diverse mitochondrial processes, including oxidative phosphorylation (OXPHOS). To function properly, CL needs to be unsaturated, which requires the acyltransferase Tafazzin (TAZ). Loss-of-function mutations in the TAZ gene are responsible for the Barth syndrome (BTHS), a rare X-linked cardiomyopathy, presumably because of a diminished OXPHOS capacity. Herein we show that a partial inhibition of cytosolic protein synthesis, either chemically with the use of cycloheximide or by specific genetic mutations, fully restores biogenesis and the activity of the oxidative phosphorylation system in a yeast BTHS model (taz1Δ). Interestingly, the defaults in CL were not suppressed, indicating that they are not primarily responsible for the OXPHOS deficiency in taz1Δ yeast. Low concentrations of cycloheximide in the picomolar range were beneficial to TAZ-deficient HeLa cells, as evidenced by the recovery of a good proliferative capacity. These findings reveal that a diminished capacity of CL remodeling deficient cells to preserve protein homeostasis is likely an important factor contributing to the pathogenesis of BTHS. This in turn, identifies cytosolic translation as a potential therapeutic target for the treatment of this disease.
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Affiliation(s)
- Maxence de Taffin de Tilques
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Jean-Paul Lasserre
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - François Godard
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Elodie Sardin
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Marine Bouhier
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Marina Le Guedard
- Laboratoire de Biogenèse Membranaire, CNRS UMR 5200, Université de Bordeaux, INRA Bordeaux Aquitaine, Villenave d'Ornon, France.,LEB Aquitaine Transfert-ADERA, FR-33883 Villenave d'Ornon, Cedex, France
| | - Roza Kucharczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Patrice X Petit
- CNRS FR3636 Fédération de recherché en Neuroscience, Université Paris-Descartes, 45, rue des Saints-Pères, 75006 Paris, France
| | - Eric Testet
- Laboratoire de Biogenèse Membranaire, CNRS UMR 5200, Université de Bordeaux, INRA Bordeaux Aquitaine, Villenave d'Ornon, France
| | - Jean-Paul di Rago
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
| | - Déborah Tribouillard-Tanvier
- Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, Université de Bordeaux, 1 rue Camille Saint-Saëns, 33077 Bordeaux cedex, France
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31
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Comparative biochemistry of cytochrome c oxidase in animals. Comp Biochem Physiol B Biochem Mol Biol 2017; 224:170-184. [PMID: 29180239 DOI: 10.1016/j.cbpb.2017.11.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/06/2017] [Accepted: 11/07/2017] [Indexed: 12/19/2022]
Abstract
Cytochrome c oxidase (COX), the terminal enzyme of the electron transport system, is central to aerobic metabolism of animals. Many aspects of its structure and function are highly conserved, yet, paradoxically, it is also an important model for studying the evolution of the metabolic phenotype. In this review, part of a special issue honouring Peter Hochachka, we consider the biology of COX from the perspective of comparative and evolutionary biochemistry. The approach is to consider what is known about the enzyme in the context of conventional biochemistry, but focus on how evolutionary researchers have used this background to explore the role of the enzyme in biochemical adaptation of animals. In synthesizing the conventional and evolutionary biochemistry, we hope to identify synergies and future research opportunities. COX represents a rare opportunity for researchers to design studies that span the breadth of biology: molecular genetics, protein biochemistry, enzymology, metabolic physiology, organismal performance, evolutionary biology, and phylogeography.
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32
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Sullivan EM, Pennington ER, Sparagna GC, Torres MJ, Neufer PD, Harris M, Washington J, Anderson EJ, Zeczycki TN, Brown DA, Shaikh SR. Docosahexaenoic acid lowers cardiac mitochondrial enzyme activity by replacing linoleic acid in the phospholipidome. J Biol Chem 2017; 293:466-483. [PMID: 29162722 DOI: 10.1074/jbc.m117.812834] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/19/2017] [Indexed: 12/21/2022] Open
Abstract
Cardiac mitochondrial phospholipid acyl chains regulate respiratory enzymatic activity. In several diseases, the rodent cardiac phospholipidome is extensively rearranged; however, whether specific acyl chains impair respiratory enzyme function is unknown. One unique remodeling event in the myocardium of obese and diabetic rodents is an increase in docosahexaenoic acid (DHA) levels. Here, we first confirmed that cardiac DHA levels are elevated in diabetic humans relative to controls. We then used dietary supplementation of a Western diet with DHA as a tool to promote cardiac acyl chain remodeling and to study its influence on respiratory enzyme function. DHA extensively remodeled the acyl chains of cardiolipin (CL), mono-lyso CL, phosphatidylcholine, and phosphatidylethanolamine. Moreover, DHA lowered enzyme activities of respiratory complexes I, IV, V, and I+III. Mechanistically, the reduction in enzymatic activities were not driven by a dramatic reduction in the abundance of supercomplexes. Instead, replacement of tetralinoleoyl-CL with tetradocosahexaenoyl-CL in biomimetic membranes prevented formation of phospholipid domains that regulate enzyme activity. Tetradocosahexaenoyl-CL inhibited domain organization due to favorable Gibbs free energy of phospholipid mixing. Furthermore, in vitro substitution of tetralinoleoyl-CL with tetradocosahexaenoyl-CL blocked complex-IV binding. Finally, reintroduction of linoleic acid, via fusion of phospholipid vesicles to mitochondria isolated from DHA-fed mice, rescued the major losses in the mitochondrial phospholipidome and complexes I, IV, and V activities. Altogether, our results show that replacing linoleic acid with DHA lowers select cardiac enzyme activities by potentially targeting domain organization and phospholipid-protein binding, which has implications for the ongoing debate about polyunsaturated fatty acids and cardiac health.
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Affiliation(s)
- E Madison Sullivan
- From the Department of Biochemistry and Molecular Biology.,East Carolina Diabetes and Obesity Institute, and
| | - Edward Ross Pennington
- From the Department of Biochemistry and Molecular Biology.,East Carolina Diabetes and Obesity Institute, and.,the Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Genevieve C Sparagna
- the Department of Medicine, Division of Cardiology, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado 80045
| | | | - P Darrell Neufer
- East Carolina Diabetes and Obesity Institute, and.,Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina 27834
| | - Mitchel Harris
- From the Department of Biochemistry and Molecular Biology
| | - James Washington
- From the Department of Biochemistry and Molecular Biology.,East Carolina Diabetes and Obesity Institute, and
| | - Ethan J Anderson
- the Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, Fraternal Order of Eagles Diabetes Research Center, University of Iowa, Iowa City, Iowa 52242, and
| | - Tonya N Zeczycki
- From the Department of Biochemistry and Molecular Biology.,East Carolina Diabetes and Obesity Institute, and
| | - David A Brown
- the Department of Human Nutrition, Foods, and Exercise, Virginia Tech Corporate Research Center, Blacksburg, Virginia 24060
| | - Saame Raza Shaikh
- From the Department of Biochemistry and Molecular Biology, .,East Carolina Diabetes and Obesity Institute, and.,the Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
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33
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Alvarez-Paggi D, Hannibal L, Castro MA, Oviedo-Rouco S, Demicheli V, Tórtora V, Tomasina F, Radi R, Murgida DH. Multifunctional Cytochrome c: Learning New Tricks from an Old Dog. Chem Rev 2017; 117:13382-13460. [DOI: 10.1021/acs.chemrev.7b00257] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Damián Alvarez-Paggi
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
| | - Luciana Hannibal
- Department
of Pediatrics, Universitätsklinikum Freiburg, Mathildenstrasse 1, Freiburg 79106, Germany
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - María A. Castro
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
| | - Santiago Oviedo-Rouco
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
| | - Veronica Demicheli
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Veronica Tórtora
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Florencia Tomasina
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Rafael Radi
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Daniel H. Murgida
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
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34
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Rathmann C, Schlösser AS, Schiller J, Bogdanov M, Brüser T. Tat transport in Escherichia coli requires zwitterionic phosphatidylethanolamine but no specific negatively charged phospholipid. FEBS Lett 2017; 591:2848-2858. [PMID: 28815570 DOI: 10.1002/1873-3468.12794] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/04/2017] [Accepted: 08/09/2017] [Indexed: 02/04/2023]
Abstract
Translocation of folded proteins by the Tat system of Escherichia coli is believed to rely on the presence of phosphatidylethanolamine (PE) and the negatively charged phospholipids cardiolipin (CL) and phosphatidylglycerol (PG). Here, we show that while PE is indeed essential for activity, the Tat system is fully functional in a clsA/clsB/clsC deletion strain lacking CL, and in a pgsA deletion strain lacking both PG and CL during aerobic growth on complex media. In contrast to early studies that relied on strains with reduced lipid levels, this study therefore demonstrates that PG and CL are dispensable for Tat transport. The lack of these lipids may be compensated by other anionic phospholipids such as phosphatidic acid, CDP-diacylglycerol or N-acyl-PE.
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Affiliation(s)
| | | | - Jürgen Schiller
- Institute of Medical Physics and Biophysics, University of Leipzig, Germany
| | - Mikhail Bogdanov
- Department of Biochemistry and Molecular Biology, McGovern Medical School, Houston, TX, USA
| | - Thomas Brüser
- Institute of Microbiology, Leibniz University Hannover, Germany
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35
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Musatov A, Sedlák E. Role of cardiolipin in stability of integral membrane proteins. Biochimie 2017; 142:102-111. [PMID: 28842204 DOI: 10.1016/j.biochi.2017.08.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 08/21/2017] [Indexed: 01/13/2023]
Abstract
Cardiolipin (CL) is a unique phospholipid with a dimeric structure having four acyl chains and two phosphate groups found almost exclusively in certain membranes of bacteria and of mitochondria of eukaryotes. CL interacts with numerous proteins and has been implicated in function and stabilization of several integral membrane proteins (IMPs). While both functional and stabilization roles of CL in IMPs has been generally acknowledged, there are, in fact, only limited number of quantitative analysis that support this function of CL. This is likely caused by relatively complex determination of parameters characterizing stability of IMPs and particularly intricate assessment of role of specific phospholipids such as CL in IMPs stability. This review aims to summarize quantitative findings regarding stabilization role of CL in IMPs reported up to now.
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Affiliation(s)
- Andrej Musatov
- Department of Biophysics, Institute of Experimental Physics Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia.
| | - Erik Sedlák
- Centre for Interdisciplinary Biosciences, P.J. Šafárik University, Jesenná 5, 040 01 Košice, Slovakia.
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36
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Ramzan R, Schaper AK, Weber P, Rhiel A, Siddiq MS, Vogt S. Mitochondrial cytochrome c oxidase is inhibited by ATP only at very high ATP/ADP ratios. Biol Chem 2017; 398:737-750. [PMID: 27926476 DOI: 10.1515/hsz-2016-0218] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 11/30/2016] [Indexed: 11/15/2022]
Abstract
In the past, divergent results have been reported based on different methods and conditions used for enzymatic activity measurements of cytochrome c oxidase (CytOx). Here, we analyze in detail and show comparable and reproducible polarographic activity measurements of ATP-dependent inhibition of CytOx kinetics in intact and non-intact rat heart mitochondria and mitoplasts. We found that this mechanism is always present in isolated rat heart mitochondria and mitoplasts; however, it is measurable only at high ATP/ADP ratios using optimal protein concentrations. In the kinetics assay, measurement of this mechanism is independent of presence or absence of Tween-20 and the composition of measuring buffer. Furthermore, the effect of atractyloside on intact rat heart mitochondria confirms that (i) ATP inhibition occurs under uncoupled conditions [in the presence of carbonly cyanide m-chlorophenyl hydrazone (CCCP)] when the classical respiratory control is absent and (ii) high ATP/ADP ratios in the matrix as well as in the cytosolic space are required for full ATP inhibition of CytOx. Additionally, ATP inhibition measured in intact mitochondria extends in the presence of oligomycin, thus indicating further that the problem to measure the inhibitory effect of ATP on CytOx is apparently due to the lack of very high ATP/ADP ratios in isolated mitochondria.
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37
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Ter Beek J, Kahle M, Ädelroth P. Modulation of protein function in membrane mimetics: Characterization of P. denitrificans cNOR in nanodiscs or liposomes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:1951-1961. [PMID: 28668220 DOI: 10.1016/j.bbamem.2017.06.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/03/2017] [Accepted: 06/27/2017] [Indexed: 10/19/2022]
Abstract
For detailed functional characterization, membrane proteins are usually studied in detergent. However, it is becoming clear that detergent micelles are often poor mimics of the lipid environment in which these proteins function. In this work we compared the catalytic properties of the membrane-embedded cytochrome c-dependent nitric oxide reductase (cNOR) from Paracoccus (P.) denitrificans in detergent, lipid/protein nanodiscs, and proteoliposomes. We used two different lipid mixtures, an extract of soybean lipids and a defined mix of synthetic lipids mimicking the original P. denitrificans membrane. We show that the catalytic activity of detergent-solubilized cNOR increased threefold upon reconstitution from detergent into proteoliposomes with the P. denitrificans lipid mixture, and above two-fold when soybean lipids were used. In contrast, there was only a small activity increase in nanodiscs. We further show that binding of the gaseous ligands CO and O2 are affected differently by reconstitution. In proteoliposomes the turnover rates are affected much more than in nanodiscs, but CO-binding is more significantly accelerated in liposomes with soybean lipids, while O2-binding is faster with the P. denitrificans lipid mix. We also investigated proton-coupled electron transfer during the reaction between fully reduced cNOR and O2, and found that the pKa of the internal proton donor was increased in proteoliposomes but not in nanodiscs. Taking our results together, the liposome-reconstituted enzyme shows significant differences to detergent-solubilized protein. Nanodiscs show much more subtle effects, presumably because of their much lower lipid to protein ratio. Which of these two membrane-mimetic systems best mimics the native membrane is discussed.
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Affiliation(s)
- Josy Ter Beek
- Department of Biochemistry and Biophysics, Stockholm University, Svante Arrhenius väg 16C, SE-106 91 Stockholm, Sweden.
| | - Maximilian Kahle
- Department of Biochemistry and Biophysics, Stockholm University, Svante Arrhenius väg 16C, SE-106 91 Stockholm, Sweden.
| | - Pia Ädelroth
- Department of Biochemistry and Biophysics, Stockholm University, Svante Arrhenius väg 16C, SE-106 91 Stockholm, Sweden.
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38
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Mlayeh L, Krammer EM, Léonetti M, Prévost M, Homblé F. The mitochondrial VDAC of bean seeds recruits phosphatidylethanolamine lipids for its proper functioning. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2017; 1858:786-794. [PMID: 28666835 DOI: 10.1016/j.bbabio.2017.06.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/28/2017] [Accepted: 06/24/2017] [Indexed: 12/31/2022]
Abstract
The voltage-dependent anion-selective channel (VDAC) is the main pathway for inorganic ions and metabolites through the mitochondrial outer membrane. Studies recently demonstrated that membrane lipids regulate its function. It remains, however, unclear how this regulation takes place. In this study, we show that phospholipids are key regulators of Phaseolus VDAC function and, furthermore, that the salt concentration modulates this regulation. Both selectivity and voltage dependence of Phaseolus VDAC are very sensitive to a change in the lipid polar head from PC to PE. Interestingly enough, this dependence is observed only at low salt concentration. Furthermore, significant changes in VDAC functional properties also occur with the gradual methylation of the PE group pointing to the role of subtle chemical variations in the lipid head group. The dependence of PcVDAC gating upon the introduction of a small mole fraction of PE in a PC bilayer has prompted us to propose the existence of a specific interaction site for PE on the outer surface of PcVDAC. Eventually, comparative modeling and molecular dynamics simulations suggest a potential mechanism to get insight into the anion selectivity enhancement of PcVDAC observed in PE relative to PC.
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Affiliation(s)
- Lamia Mlayeh
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 206/2, B-1050 Brussels, Belgium
| | - Eva-Maria Krammer
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 206/2, B-1050 Brussels, Belgium.
| | - Marc Léonetti
- I.R.P.H.E., Aix-Marseille Université, CNRS, Technopôle de Château-Gombert, F-13384, Marseille Cedex 13, France.
| | - Martine Prévost
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 206/2, B-1050 Brussels, Belgium.
| | - Fabrice Homblé
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Boulevard du Triomphe CP 206/2, B-1050 Brussels, Belgium.
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Choi EM, Suh KS, Rhee SY, Oh S, Woo JT, Kim SW, Kim YS, Pak YK, Chon S. Perfluorooctanoic acid induces mitochondrial dysfunction in MC3T3-E1 osteoblast cells. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2017; 52:281-289. [PMID: 27901621 DOI: 10.1080/10934529.2016.1253402] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Perfluorooctanoic acid (PFOA), a stable organic perfluorinated compound, is an emerging persistent organic pollutant, found widely in human and wildlife populations. Recent evidence suggests that exposure to environmental toxicants can be associated with higher risks of osteoporosis and fractures. We studied the cellular toxicology of PFOA in MC3T3-E1osteoblast cells. To examine the effect of PFOA, we measured cell viability, reactive oxygen species (ROS), mitochondrial superoxide, and mitochondrial parameters including adenosine triphosphate (ATP) level, mitochondrial membrane potential (MMP), cardiolipin content, and cytochrome c release in MC3T3-E1 cells. Incubating MC3T3-E1 cells in different concentrations of PFOA for 48 h resulted in a concentration-dependent decrease in cell viability and significant inductions of ROS and mitochondrial superoxide. Moreover, PFOA induced MMP collapse, cardiolipin peroxidation, cytochrome c release, and decreased ATP levels, which in turn induced apoptosis or necrosis. When osteoblast differentiation markers were assessed, PFOA treatment caused a significant reduction in alkaline phosphatase activity, collagen synthesis, and mineralization in the cells. In summary, we found an ROS- and mitochondria-mediated pathway for the induction of cell damage by PFOA in MC3T3-E1 cells. Together, our results indicate that mitochondrial toxicity could be a plausible mechanism for the toxic effects of PFOA on osteoblast function.
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Affiliation(s)
- Eun Mi Choi
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
| | - Kwang Sik Suh
- b Research Institute of Endocrinology, Kyung Hee University Hospital , Seoul , Republic of Korea
| | - Sang Youl Rhee
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
| | - Seungjoon Oh
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
| | - Jeong-Taek Woo
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
| | - Sung Woon Kim
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
| | - Young Seol Kim
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
- c Department of Internal Medicine , Chung Hospital , Seongnam-si , Gyeonggi-do , Republic of Korea
| | - Youngmi Kim Pak
- d Department of Physiology , Kyung Hee University, College of Medicine , Seoul , Republic of Korea
| | - Suk Chon
- a Department of Endocrinology and Metabolism , School of Medicine, Kyung Hee University , Seoul , Republic of Korea
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de Taffin de Tilques M, Tribouillard-Tanvier D, Tétaud E, Testet E, di Rago JP, Lasserre JP. Overexpression of mitochondrial oxodicarboxylate carrier (ODC1) preserves oxidative phosphorylation in a yeast model of Barth syndrome. Dis Model Mech 2017; 10:439-450. [PMID: 28188263 PMCID: PMC5399564 DOI: 10.1242/dmm.027540] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 02/04/2017] [Indexed: 12/21/2022] Open
Abstract
Cardiolipin (CL) is a diglycerol phospholipid mostly found in mitochondria where it optimizes numerous processes, including oxidative phosphorylation (OXPHOS). To function properly, CL needs to be unsaturated, which requires the acyltransferase tafazzin. Loss-of-function mutations in this protein are responsible for Barth syndrome (BTHS), presumably because of a diminished OXPHOS capacity. Here, we show that overexpressing Odc1p, a conserved oxodicarboxylic acid carrier located in the mitochondrial inner membrane, fully restores oxidative phosphorylation in a yeast model (taz1Δ) of BTHS. The rescuing activity involves the recovery of normal expression of key components that sustain oxidative phosphorylation, including cytochrome c and electron transport chain complexes IV and III, which are strongly downregulated in taz1Δ yeast. Interestingly, overexpression of Odc1p was also shown previously to rescue yeast models of mitochondrial diseases caused by defects in the assembly of ATP synthase and by mutations in the MPV17 protein that result in hepatocerebral mitochondrial DNA depletion syndrome. These findings define the transport of oxodicarboxylic acids across the inner membrane as a potential therapeutic target for a large spectrum of mitochondrial diseases, including BTHS.
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Affiliation(s)
- Maxence de Taffin de Tilques
- Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux cedex 33077, France
| | - Déborah Tribouillard-Tanvier
- Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux cedex 33077, France
| | - Emmanuel Tétaud
- Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux cedex 33077, France
| | - Eric Testet
- Université de Bordeaux, Laboratoire de biogenèse membranaire, CNRS UMR 5200, INRA Bordeaux Aquitaine BP81, 33883 Villenave d'Ornon Cédex, France
| | - Jean-Paul di Rago
- Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux cedex 33077, France
| | - Jean-Paul Lasserre
- Université de Bordeaux, Institut de Biochimie et Génétique Cellulaires, CNRS UMR 5095, 1 rue Camille Saint-Saëns, Bordeaux cedex 33077, France
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Félix L, Oliveira M, Videira R, Maciel E, Alves ND, Nunes FM, Alves A, Almeida JM, Domingues MRM, Peixoto FP. Carvedilol exacerbate gentamicin-induced kidney mitochondrial alterations in adult rat. ACTA ACUST UNITED AC 2017; 69:83-92. [DOI: 10.1016/j.etp.2016.11.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/05/2016] [Accepted: 11/21/2016] [Indexed: 10/20/2022]
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Pointer CB, Klegeris A. Cardiolipin in Central Nervous System Physiology and Pathology. Cell Mol Neurobiol 2016; 37:1161-1172. [PMID: 28039536 DOI: 10.1007/s10571-016-0458-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 12/19/2016] [Indexed: 02/08/2023]
Abstract
Cardiolipin, an anionic phospholipid found primarily in the inner mitochondrial membrane, has many well-defined roles within the peripheral tissues, including the maintenance of mitochondrial membrane fluidity and the regulation of mitochondrial functions. Within the central nervous system (CNS), cardiolipin is found within both neuronal and non-neuronal glial cells, where it regulates metabolic processes, supports mitochondrial functions, and promotes brain cell viability. Furthermore, cardiolipin has been shown to act as an elimination signal and participate in programmed cell death by apoptosis of both neurons and glia. Since cardiolipin is associated with regulating brain homeostasis, the modification of its structure, or even a decrease in the overall levels of cardiolipin, can result in mitochondrial dysfunction, which is a characteristic feature of many diseases. In this review, we outline the various functions of cardiolipin within the cells of the CNS, including neurons, astrocytes, microglia, and oligodendrocytes. In addition, we discuss the role cardiolipin may play in the pathogenesis of the neurodegenerative disorders Alzheimer's disease and Parkinson's disease, as well as traumatic brain injury.
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Affiliation(s)
- Caitlin B Pointer
- Department of Biology, University of British Columbia, Okanagan Campus, Kelowna, BC, V1V 1V7, Canada
| | - Andis Klegeris
- Department of Biology, University of British Columbia, Okanagan Campus, Kelowna, BC, V1V 1V7, Canada.
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Fadhlaoui M, Couture P. Combined effects of temperature and metal exposure on the fatty acid composition of cell membranes, antioxidant enzyme activities and lipid peroxidation in yellow perch (Perca flavescens). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 180:45-55. [PMID: 27649097 DOI: 10.1016/j.aquatox.2016.09.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 09/02/2016] [Accepted: 09/06/2016] [Indexed: 05/26/2023]
Abstract
The aim of this study was to investigate the combined effects of temperature and metal contamination (cadmium and nickel) on phospholipid fatty acid composition, antioxidant enzyme activities and lipid peroxidation in fish. Yellow perch were acclimated to two different temperatures (9°C and 28°C) and exposed either to Cd or Ni (respectively 4μg/L and 600μg/L) for seven weeks. Superoxide dismutase, catalase, glutathione-S-transferase, glutathione peroxidase activities and glutathione concentration were measured as indicators of antioxidant capacities, while malondialdehyde concentration was used as an indicator of lipid peroxidation. Poikilotherms including fish counteract the effects of temperature on phospholipid fatty acid ordering by remodelling their composition to maintain optimal fluidity. Accordingly, in our study, the fatty acid composition of yellow perch muscle at 9°C was enhanced in monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA) compared to fish maintained at 28°C, in agreement with the theory of homeoviscous adaptation. Using ratios of various fatty acids as surrogates for desaturase and elongase activities, our data suggests that modification of the activity of these enzymes is responsible for the thermal acclimation of phospholipid fatty acid profiles. However, this response was altered under Ni and Cd exposure: PUFA decreased (specifically n-6 PUFA) while the proportion of saturated fatty acids increased at 9°C, whereas at 28°C, PUFA increased to proportions exceeding those observed at 9°C. Lipid peroxidation could be observed under all experimental conditions. Both enzymatic and non-enzymatic antioxidant defense systems acted cooperatively to cope with oxidative stress leading to lipid peroxidation, which was not affected by temperature acclimation as indicated by malondialdehyde concentration, in spite of a higher polyinsaturation in cold-acclimated fish which would be predicted to increase their vulnerability to peroxidation. However, in warm-acclimated, Ni-exposed fish, in which the highest proportion of PUFA was observed, lower concentrations of malondialdehyde were measured, suggesting an overcompensation of antioxidant mechanisms in these fish which could represent a substantial metabolic cost and explain their lower condition.
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Affiliation(s)
- Mariem Fadhlaoui
- Institut National de la Recherche Scientifique, Centre Eau Terre Environment, 490 de la Couronne, QC G1K 9A9, Canada
| | - Patrice Couture
- Institut National de la Recherche Scientifique, Centre Eau Terre Environment, 490 de la Couronne, QC G1K 9A9, Canada.
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Krishnasamy Y, Ramshesh VK, Gooz M, Schnellmann RG, Lemasters JJ, Zhong Z. Ethanol and High Cholesterol Diet Causes Severe Steatohepatitis and Early Liver Fibrosis in Mice. PLoS One 2016; 11:e0163342. [PMID: 27676640 PMCID: PMC5038945 DOI: 10.1371/journal.pone.0163342] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 09/07/2016] [Indexed: 12/15/2022] Open
Abstract
Background and Aim Because ethanol consumption is commonly associated with a high cholesterol diet, we examined whether combined consumption of ethanol and high cholesterol increases liver injury and fibrosis. Methods Male C57BL/6J mice were fed diets containing: 1) 35% of calories from corn oil (CTR), 2) CTR plus 0.5% (w/v) cholesterol (Chol), 3) CTR plus ethanol (27% of calories) (EtOH), or 4) EtOH+Chol for 3 months. Results In mice fed Chol or EtOH alone, ALT increased to ~160 U/L, moderate hepatic steatosis occurred, and leukocyte infiltration, necrosis, and apoptosis increased modestly, but no observable fibrosis developed. By contrast in mice fed EtOH+Chol, ALT increased to ~270 U/L, steatosis was more extensive and mostly macrovesicular, and expression of proinflammatory molecules (HMGB-1, TLR4, TNFα, ICAM-1) and leukocyte infiltration increased substantially. Necrosis and apoptosis also increased. Trichrome staining and second harmonic generation microscopy revealed hepatic fibrosis. Fibrosis was mostly sinusoidal and/or perivenular, but in some mice bridging fibrosis occurred. Expression of smooth muscle α-actin and TGF-β1 increased slightly by Chol, moderately by EtOH, and markedly by EtOH+Chol. TGF-β pseudoreceptor BAMBI increased slightly by Chol, remained unchanged by EtOH and decreased by EtOH+Chol. MicroRNA-33a, which enhances TGF-β fibrotic effects, and phospho-Smad2/3, the down-stream signal of TGF-β, also increased more greatly by EtOH+Chol than Chol or EtOH. Metalloproteinase-2 and -9 were decreased only by EtOH+Chol. Conclusion High dietary cholesterol and chronic ethanol consumption synergistically increase liver injury, inflammation, and profibrotic responses and suppress antifibrotic responses, leading to severe steatohepatitis and early fibrosis in mice.
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Affiliation(s)
- Yasodha Krishnasamy
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Venkat K. Ramshesh
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Monika Gooz
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Rick G. Schnellmann
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina, United States of America
| | - John J. Lemasters
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America
- Department of Biochemistry & Molecular Biology, Medical University of South Carolina, Charleston, South Carolina, United States of America
- Institute of Theoretical & Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russian Federation
| | - Zhi Zhong
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America
- * E-mail:
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Dimer interface of bovine cytochrome c oxidase is influenced by local posttranslational modifications and lipid binding. Proc Natl Acad Sci U S A 2016; 113:8230-5. [PMID: 27364008 DOI: 10.1073/pnas.1600354113] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Bovine cytochrome c oxidase is an integral membrane protein complex comprising 13 protein subunits and associated lipids. Dimerization of the complex has been proposed; however, definitive evidence for the dimer is lacking. We used advanced mass spectrometry methods to investigate the oligomeric state of cytochrome c oxidase and the potential role of lipids and posttranslational modifications in its subunit interfaces. Mass spectrometry of the intact protein complex revealed that both the monomer and the dimer are stabilized by large lipid entities. We identified these lipid species from the purified protein complex, thus implying that they interact specifically with the enzyme. We further identified phosphorylation and acetylation sites of cytochrome c oxidase, located in the peripheral subunits and in the dimer interface, respectively. Comparing our phosphorylation and acetylation sites with those found in previous studies of bovine, mouse, rat, and human cytochrome c oxidase, we found that whereas some acetylation sites within the dimer interface are conserved, suggesting a role for regulation and stabilization of the dimer, phosphorylation sites were less conserved and more transient. Our results therefore provide insights into the locations and interactions of lipids with acetylated residues within the dimer interface of this enzyme, and thereby contribute to a better understanding of its structure in the natural membrane. Moreover dimeric cytochrome c oxidase, comprising 20 transmembrane, six extramembrane subunits, and associated lipids, represents the largest integral membrane protein complex that has been transferred via electrospray intact into the gas phase of a mass spectrometer, representing a significant technological advance.
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Evaluation of the mitochondrial system in the gonad-digestive gland complex of Biomphalaria glabrata (Mollusca, Gastropoda) after infection by Echinostoma paraensei (Trematoda, Echinostomatidae). J Invertebr Pathol 2016; 136:136-41. [DOI: 10.1016/j.jip.2016.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 03/24/2016] [Accepted: 04/10/2016] [Indexed: 11/21/2022]
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Vergeade A, Bertram CC, Bikineyeva AT, Zackert WE, Zinkel SS, May JM, Dikalov SI, Roberts LJ, Boutaud O. Cardiolipin fatty acid remodeling regulates mitochondrial function by modifying the electron entry point in the respiratory chain. Mitochondrion 2016; 28:88-95. [PMID: 27085476 DOI: 10.1016/j.mito.2016.04.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 03/24/2016] [Accepted: 04/07/2016] [Indexed: 01/18/2023]
Abstract
Modifications of cardiolipin (CL) levels or compositions are associated with changes in mitochondrial function in a wide range of pathologies. We have made the discovery that acetaminophen remodels CL fatty acids composition from tetralinoleoyl to linoleoyltrioleoyl-CL, a remodeling that is associated with decreased mitochondrial respiration. Our data show that CL remodeling causes a shift in electron entry from complex II to the β-oxidation electron transfer flavoprotein quinone oxidoreductase (ETF/QOR) pathway. These data demonstrate that electron entry in the respiratory chain is regulated by CL fatty acid composition and provide proof-of-concept that pharmacological intervention can be used to modify CL composition.
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Affiliation(s)
- Aurelia Vergeade
- Department of Pharmacology, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - Clinton C Bertram
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - Alfiya T Bikineyeva
- Department of Medicine, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - William E Zackert
- Department of Pharmacology, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - Sandra S Zinkel
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States; Department of Medicine, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - James M May
- Department of Medicine, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - Sergey I Dikalov
- Department of Medicine, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - L Jackson Roberts
- Department of Pharmacology, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States; Department of Medicine, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States
| | - Olivier Boutaud
- Department of Pharmacology, Vanderbilt University Medical Center, 536 Robinson Research Building, Nashville, TN 37232-6602, United States.
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Musatov A, Varhač R, Hosler JP, Sedlák E. Delipidation of cytochrome c oxidase from Rhodobacter sphaeroides destabilizes its quaternary structure. Biochimie 2016; 125:23-31. [PMID: 26923069 DOI: 10.1016/j.biochi.2016.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 02/23/2016] [Indexed: 11/28/2022]
Abstract
Delipidation of detergent-solubilized cytochrome c oxidase isolated from Rhodobacter sphaeroides (Rbs-CcO) has no apparent structural and/or functional effect on the protein, however affects its resistance against thermal or chemical denaturation. Phospholipase A2 (PLA2) hydrolysis of phospholipids that are co-purified with the enzyme removes all but two tightly bound phosphatidylethanolamines. Replacement of the removed phospholipids with nonionic detergent decreases both thermal stability of the enzyme and its resilience against the effect of chemical denaturants such as urea. In contrast to nondelipidated Rbs-CcO, the enzymatic activity of PLA2-treated Rbs-CcO is substantially diminished after exposure to high (>4 M) urea concentration at room temperature without an alteration of its secondary structure. Absorbance spectroscopy and sedimentation velocity experiments revealed a strong correlation between intact tertiary structure of heme regions and quaternary structure, respectively, and the enzymatic activity of the protein. We concluded that phospholipid environment of Rbs-CcO has the protective role for stability of its tertiary and quaternary structures.
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Affiliation(s)
- Andrej Musatov
- Department of Biochemistry, The University of Texas Health Science Center, San Antonio, TX 78229-3900, USA; Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, Slovakia.
| | - Rastislav Varhač
- Department of Biochemistry, The University of Texas Health Science Center, San Antonio, TX 78229-3900, USA; Department of Biochemistry, P.J. Šafárik University, Moyzesova 11, 04001 Košice, Slovakia.
| | - Jonathan P Hosler
- Department of Biochemistry, The University of Mississippi Medical Center, Jackson, MS 39216, USA.
| | - Erik Sedlák
- Department of Biochemistry, The University of Texas Health Science Center, San Antonio, TX 78229-3900, USA; Department of Biochemistry, P.J. Šafárik University, Moyzesova 11, 04001 Košice, Slovakia; Centre for Interdisciplinary Biosciences, P.J. Šafárik University, Jesenná 5, 04001 Košice, Slovakia.
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Peyta L, Jarnouen K, Pinault M, Guimaraes C, Pais de Barros JP, Chevalier S, Dumas JF, Maillot F, Hatch GM, Loyer P, Servais S. Reduced cardiolipin content decreases respiratory chain capacities and increases ATP synthesis yield in the human HepaRG cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2016; 1857:443-53. [PMID: 26768115 DOI: 10.1016/j.bbabio.2016.01.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 12/14/2015] [Accepted: 01/04/2016] [Indexed: 11/17/2022]
Abstract
Cardiolipin (CL) is a unique mitochondrial phospholipid potentially affecting many aspects of mitochondrial function/processes, i.e. energy production through oxidative phosphorylation. Most data focusing on implication of CL content and mitochondrial bioenergetics were performed in yeast or in cellular models of Barth syndrome. Previous work reported that increase in CL content leads to decrease in liver mitochondrial ATP synthesis yield. Therefore the aim of this study was to determine the effects of moderate decrease in CL content on mitochondrial bioenergetics in human hepatocytes. For this purpose, we generated a cardiolipin synthase knockdown (shCLS) in HepaRG hepatoma cells showing bioenergetics features similar to primary human hepatocytes. shCLS cells exhibited a 55% reduction in CLS gene and a 40% decrease in protein expression resulting in a 45% lower content in CL compared to control (shCTL) cells. Oxygen consumption was significantly reduced in shCLS cells compared to shCTL regardless of substrate used and energy state analyzed. Mitochondrial low molecular weight supercomplex content was higher in shCLS cells (+60%) compared to shCTL. Significant fragmentation of the mitochondrial network was observed in shCLS cells compared to shCTL cells. Surprisingly, mitochondrial ATP synthesis was unchanged in shCLS compared to shCTL cells but exhibited a higher ATP:O ratio (+46%) in shCLS cells. Our results suggest that lowered respiratory chain activity induced by moderate reduction in CL content may be due to both destabilization of supercomplexes and mitochondrial network fragmentation. In addition, CL content may regulate mitochondrial ATP synthesis yield.
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Affiliation(s)
- Laure Peyta
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Kathleen Jarnouen
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes, Cedex, France.
| | - Michelle Pinault
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Cyrille Guimaraes
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Jean-Paul Pais de Barros
- Plateforme de Lipidomique, INSERM UMR866/LabEx LipSTIC, 15 Bd Mal de Lattre de Tassigny, 21000 Dijon, France.
| | - Stephan Chevalier
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - Jean-François Dumas
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
| | - François Maillot
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France; CHRU de Tours, Département de Médecine Interne, 2, boulevard Tonnellé, 37044 Tours, Cedex 9, France.
| | - Grant M Hatch
- Department of Pharmacology and Therapeutics, Biochemistry and Medical Genetics, Faculty of Health Sciences, Center for Research and Treatment of Atherosclerosis, DREAM Children's Hospital Research Institute of Manitoba, University of Manitoba, 513-715 McDermot Avenue Winnipeg MB R3E 3P4, Manitoba, Canada.
| | - Pascal Loyer
- Inserm UMR S-991, Foie, Métabolismes et Cancer, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes, France; Université de Rennes 1, 2 rue du Thabor CS46510, 35065 Rennes, Cedex, France.
| | - Stephane Servais
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François Rabelais de Tours, 10, bd Tonnellé, 37032 Tours, Cedex, France.
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50
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Altered Traffic of Cardiolipin during Apoptosis: Exposure on the Cell Surface as a Trigger for "Antiphospholipid Antibodies". J Immunol Res 2015; 2015:847985. [PMID: 26491702 PMCID: PMC4603604 DOI: 10.1155/2015/847985] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/06/2015] [Indexed: 02/07/2023] Open
Abstract
Apoptosis has been reported to induce changes in the remodelling of membrane lipids; after death receptor engagement, specific changes of lipid composition occur not only at the plasma membrane, but also in intracellular membranes. This paper focuses on one important aspect of apoptotic changes in cellular lipids, namely, the redistribution of the mitochondria-specific phospholipid, cardiolipin (CL). CL predominantly resides in the inner mitochondrial membrane, even if the rapid remodelling of its acyl chains and the subsequent degradation occur in other membrane organelles. After death receptor stimulation, CL appears to concentrate into mitochondrial “raft-like” microdomains at contact sites between inner and outer mitochondrial membranes, leading to local oligomerization of proapoptotic proteins, including Bid. Clustering of Bid in CL-enriched contacts sites is interconnected with pathways of CL remodelling that intersect membrane traffic routes dependent upon actin. In addition, CL association with cytoskeleton protein vimentin was observed. Such novel association also indicated that CL molecules may be expressed at the cell surface following apoptotic stimuli. This observation adds a novel implication of biomedical relevance. The association of CL with vimentin at the cell surface may represent a “new” target antigen in the context of the apoptotic origin of anti-vimentin/CL autoantibodies in Antiphospholipid Syndrome.
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