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Abstract
Ferroptosis is a form of necrotic cell death characterized by iron-dependent lipid peroxidation culminating in membrane rupture. Accumulating evidence links ferroptosis to multiple cardiac diseases and identifies mitochondria as important regulators of ferroptosis. Mitochondria are not only a major source of reactive oxygen species (ROS) but also counteract ferroptosis by preserving cellular redox balance and oxidative defense. Recent evidence has revealed that the mitochondrial integrated stress response limits oxidative stress and ferroptosis in oxidative phosphorylation (OXPHOS)-deficient cardiomyocytes and protects against mitochondrial cardiomyopathy. We summarize the multiple ways in which mitochondria modulate the susceptibility of cells to ferroptosis, and discuss the implications of ferroptosis for cardiomyopathies in mitochondrial disease.
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Affiliation(s)
- Sofia Ahola
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Thomas Langer
- Max Planck Institute for Biology of Ageing, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.
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2
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Yin Z, Agip ANA, Bridges HR, Hirst J. Structural insights into respiratory complex I deficiency and assembly from the mitochondrial disease-related ndufs4 -/- mouse. EMBO J 2024; 43:225-249. [PMID: 38177503 PMCID: PMC10897435 DOI: 10.1038/s44318-023-00001-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/30/2023] [Accepted: 11/07/2023] [Indexed: 01/06/2024] Open
Abstract
Respiratory complex I (NADH:ubiquinone oxidoreductase) is essential for cellular energy production and NAD+ homeostasis. Complex I mutations cause neuromuscular, mitochondrial diseases, such as Leigh Syndrome, but their molecular-level consequences remain poorly understood. Here, we use a popular complex I-linked mitochondrial disease model, the ndufs4-/- mouse, to define the structural, biochemical, and functional consequences of the absence of subunit NDUFS4. Cryo-EM analyses of the complex I from ndufs4-/- mouse hearts revealed a loose association of the NADH-dehydrogenase module, and discrete classes containing either assembly factor NDUFAF2 or subunit NDUFS6. Subunit NDUFA12, which replaces its paralogue NDUFAF2 in mature complex I, is absent from all classes, compounding the deletion of NDUFS4 and preventing maturation of an NDUFS4-free enzyme. We propose that NDUFAF2 recruits the NADH-dehydrogenase module during assembly of the complex. Taken together, the findings provide new molecular-level understanding of the ndufs4-/- mouse model and complex I-linked mitochondrial disease.
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Affiliation(s)
- Zhan Yin
- The Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Keith Peters Building, Cambridge Biomedical Campus, Cambridge, UK
- Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge, CB2 1GA, UK
| | - Ahmed-Noor A Agip
- The Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Keith Peters Building, Cambridge Biomedical Campus, Cambridge, UK
- Max-Planck-Institute of Biophysics, Frankfurt, 60438, Germany
| | - Hannah R Bridges
- The Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Keith Peters Building, Cambridge Biomedical Campus, Cambridge, UK.
- Structura Biotechnology Inc., Toronto, Canada.
| | - Judy Hirst
- The Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Keith Peters Building, Cambridge Biomedical Campus, Cambridge, UK.
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3
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Patitucci C, Hernández-Camacho JD, Vimont E, Yde S, Cokelaer T, Chaze T, Giai Gianetto Q, Matondo M, Gazi A, Nemazanyy I, Stroud DA, Hock DH, Donnarumma E, Wai T. Mtfp1 ablation enhances mitochondrial respiration and protects against hepatic steatosis. Nat Commun 2023; 14:8474. [PMID: 38123539 PMCID: PMC10733382 DOI: 10.1038/s41467-023-44143-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 12/01/2023] [Indexed: 12/23/2023] Open
Abstract
Hepatic steatosis is the result of imbalanced nutrient delivery and metabolism in the liver and is the first hallmark of Metabolic dysfunction-associated steatotic liver disease (MASLD). MASLD is the most common chronic liver disease and involves the accumulation of excess lipids in hepatocytes, inflammation, and cancer. Mitochondria play central roles in liver metabolism yet the specific mitochondrial functions causally linked to MASLD remain unclear. Here, we identify Mitochondrial Fission Process 1 protein (MTFP1) as a key regulator of mitochondrial and metabolic activity in the liver. Deletion of Mtfp1 in hepatocytes is physiologically benign in mice yet leads to the upregulation of oxidative phosphorylation (OXPHOS) activity and mitochondrial respiration, independently of mitochondrial biogenesis. Consequently, liver-specific knockout mice are protected against high fat diet-induced steatosis and metabolic dysregulation. Additionally, Mtfp1 deletion inhibits mitochondrial permeability transition pore opening in hepatocytes, conferring protection against apoptotic liver damage in vivo and ex vivo. Our work uncovers additional functions of MTFP1 in the liver, positioning this gene as an unexpected regulator of OXPHOS and a therapeutic candidate for MASLD.
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Affiliation(s)
- Cecilia Patitucci
- Institut Pasteur, Mitochondrial Biology Group, CNRS UMR 3691, Université Paris Cité, Paris, France
| | | | - Elodie Vimont
- Institut Pasteur, Mitochondrial Biology Group, CNRS UMR 3691, Université Paris Cité, Paris, France
| | - Sonny Yde
- Institut Pasteur, Mitochondrial Biology Group, CNRS UMR 3691, Université Paris Cité, Paris, France
| | - Thomas Cokelaer
- Institut Pasteur, Biomics Technological Platform, Université Paris Cité, Paris, France
- Institut Pasteur, Bioinformatics and Biostatistics Hub, Université Paris Cité, Paris, France
| | - Thibault Chaze
- Institut Pasteur, Proteomics Core Facility, MSBio UtechS, UAR CNRS 2024, Université Paris Cité, Paris, France
| | - Quentin Giai Gianetto
- Institut Pasteur, Bioinformatics and Biostatistics Hub, Université Paris Cité, Paris, France
- Institut Pasteur, Proteomics Core Facility, MSBio UtechS, UAR CNRS 2024, Université Paris Cité, Paris, France
| | - Mariette Matondo
- Institut Pasteur, Bioinformatics and Biostatistics Hub, Université Paris Cité, Paris, France
| | - Anastasia Gazi
- Institut Pasteur Ultrastructural Bio Imaging, UTechS, Université Paris Cité, Paris, France
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, SFR Necker, INSERM US24/CNRS UAR 3633, Paris, France
| | - David A Stroud
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Victorian Clinical Genetics Services and Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, VIC, Australia
| | - Daniella H Hock
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Victorian Clinical Genetics Services and Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, VIC, Australia
| | - Erminia Donnarumma
- Institut Pasteur, Mitochondrial Biology Group, CNRS UMR 3691, Université Paris Cité, Paris, France
| | - Timothy Wai
- Institut Pasteur, Mitochondrial Biology Group, CNRS UMR 3691, Université Paris Cité, Paris, France.
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4
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Heusch G, Andreadou I, Bell R, Bertero E, Botker HE, Davidson SM, Downey J, Eaton P, Ferdinandy P, Gersh BJ, Giacca M, Hausenloy DJ, Ibanez B, Krieg T, Maack C, Schulz R, Sellke F, Shah AM, Thiele H, Yellon DM, Di Lisa F. Health position paper and redox perspectives on reactive oxygen species as signals and targets of cardioprotection. Redox Biol 2023; 67:102894. [PMID: 37839355 PMCID: PMC10590874 DOI: 10.1016/j.redox.2023.102894] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/04/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023] Open
Abstract
The present review summarizes the beneficial and detrimental roles of reactive oxygen species in myocardial ischemia/reperfusion injury and cardioprotection. In the first part, the continued need for cardioprotection beyond that by rapid reperfusion of acute myocardial infarction is emphasized. Then, pathomechanisms of myocardial ischemia/reperfusion to the myocardium and the coronary circulation and the different modes of cell death in myocardial infarction are characterized. Different mechanical and pharmacological interventions to protect the ischemic/reperfused myocardium in elective percutaneous coronary interventions and coronary artery bypass grafting, in acute myocardial infarction and in cardiotoxicity from cancer therapy are detailed. The second part keeps the focus on ROS providing a comprehensive overview of molecular and cellular mechanisms involved in ischemia/reperfusion injury. Starting from mitochondria as the main sources and targets of ROS in ischemic/reperfused myocardium, a complex network of cellular and extracellular processes is discussed, including relationships with Ca2+ homeostasis, thiol group redox balance, hydrogen sulfide modulation, cross-talk with NAPDH oxidases, exosomes, cytokines and growth factors. While mechanistic insights are needed to improve our current therapeutic approaches, advancements in knowledge of ROS-mediated processes indicate that detrimental facets of oxidative stress are opposed by ROS requirement for physiological and protective reactions. This inevitable contrast is likely to underlie unsuccessful clinical trials and limits the development of novel cardioprotective interventions simply based upon ROS removal.
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Affiliation(s)
- Gerd Heusch
- Institute for Pathophysiology, West German Heart and Vascular Center, University of Duisburg-Essen, Essen, Germany.
| | - Ioanna Andreadou
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Robert Bell
- The Hatter Cardiovascular Institute, University College London, London, United Kingdom
| | - Edoardo Bertero
- Chair of Cardiovascular Disease, Department of Internal Medicine and Specialties, University of Genova, Genova, Italy
| | - Hans-Erik Botker
- Department of Cardiology, Institute for Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | - Sean M Davidson
- The Hatter Cardiovascular Institute, University College London, London, United Kingdom
| | - James Downey
- Department of Physiology, University of South Alabama, Mobile, AL, USA
| | - Philip Eaton
- William Harvey Research Institute, Queen Mary University of London, Heart Centre, Charterhouse Square, London, United Kingdom
| | - Peter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Bernard J Gersh
- Department of Cardiovascular Medicine, Mayo Clinic College of Medicine and Science, Rochester, MN, USA
| | - Mauro Giacca
- School of Cardiovascular and Metabolic Medicine & Sciences, King's College, London, United Kingdom
| | - Derek J Hausenloy
- The Hatter Cardiovascular Institute, University College London, London, United Kingdom; Cardiovascular & Metabolic Disorders Program, Duke-National University of Singapore Medical School, National Heart Research Institute Singapore, National Heart Centre, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Borja Ibanez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), IIS-Fundación Jiménez Díaz University Hospital, and CIBERCV, Madrid, Spain
| | - Thomas Krieg
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Christoph Maack
- Department of Translational Research, Comprehensive Heart Failure Center, University Clinic Würzburg, Würzburg, Germany
| | - Rainer Schulz
- Institute for Physiology, Justus-Liebig -Universität, Giessen, Germany
| | - Frank Sellke
- Division of Cardiothoracic Surgery, Alpert Medical School of Brown University and Rhode Island Hospital, Providence, RI, USA
| | - Ajay M Shah
- King's College London British Heart Foundation Centre of Excellence, London, United Kingdom
| | - Holger Thiele
- Heart Center Leipzig at University of Leipzig and Leipzig Heart Science, Leipzig, Germany
| | - Derek M Yellon
- The Hatter Cardiovascular Institute, University College London, London, United Kingdom
| | - Fabio Di Lisa
- Dipartimento di Scienze Biomediche, Università degli studi di Padova, Padova, Italy.
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5
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Gallo G, Forte M, Cotugno M, Marchitti S, Stanzione R, Tocci G, Bianchi F, Palmerio S, Scioli M, Frati G, Sciarretta S, Barbato E, Volpe M, Rubattu S. Polymorphic variants at NDUFC2, encoding a mitochondrial complex I subunit, associate with cardiac hypertrophy in human hypertension. Mol Med 2023; 29:107. [PMID: 37558995 PMCID: PMC10410816 DOI: 10.1186/s10020-023-00701-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 07/18/2023] [Indexed: 08/11/2023] Open
Abstract
BACKGROUND A dysfunction of NADH dehydrogenase, the mitochondrial Complex I (CI), associated with the development of left ventricular hypertrophy (LVH) in previous experimental studies. A deficiency of Ndufc2 (subunit of CI) impairs CI activity causing severe mitochondrial dysfunction. The T allele at NDUFC2/rs11237379 variant associates with reduced gene expression and impaired mitochondrial function. The present study tested the association of both NDUFC2/rs11237379 and NDUFC2/rs641836 variants with LVH in hypertensive patients. In vitro studies explored the impact of reduced Ndufc2 expression in isolated cardiomyocytes. METHODS Two-hundred-forty-six subjects (147 male, 59.7%), with a mean age of 59 ± 15 years, were included for the genetic association analysis. Ndufc2 silencing was performed in both H9c2 and rat primary cardiomyocytes to explore the hypertrophy development and the underlying signaling pathway. RESULTS The TT genotype at NDUFC2/rs11237379 associated with significantly reduced gene expression. Multivariate analysis revealed that patients carrying this genotype showed significant differences for septal thickness (p = 0.07), posterior wall thickness (p = 0.008), RWT (p = 0.021), LV mass/BSA (p = 0.03), compared to subjects carrying either CC or CT genotypes. Patients carrying the A allele at NDUFC2/rs641836 showed significant differences for septal thickness (p = 0.017), posterior wall thickness (p = 0.011), LV mass (p = 0.003), LV mass/BSA (p = 0.002) and LV mass/height2.7(p = 0.010) after adjustment for covariates. In-vitro, the Ndufc2 deficiency-dependent mitochondrial dysfunction caused cardiomyocyte hypertrophy, pointing to SIRT3-AMPK-AKT-MnSOD as a major underlying signaling pathway. CONCLUSIONS We demonstrated for the first time a significant association of NDUFC2 variants with LVH in human hypertension and highlight a key role of Ndufc2 deficiency-dependent CI mitochondrial dysfunction on increased susceptibility to cardiac hypertrophy development.
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Affiliation(s)
- Giovanna Gallo
- Department of Clinical and Molecular Medicine, School of Medicine and Psychology, Sapienza University, Rome, Italy
| | | | | | | | | | - Giuliano Tocci
- Department of Clinical and Molecular Medicine, School of Medicine and Psychology, Sapienza University, Rome, Italy
| | | | - Silvia Palmerio
- Department of Medicine, University of Verona School of Medicine, Verona University Hospital Trust, Verona, Italy
| | | | - Giacomo Frati
- IRCCS Neuromed, Pozzilli (Is), Italy
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy
| | - Sebastiano Sciarretta
- IRCCS Neuromed, Pozzilli (Is), Italy
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy
| | - Emanuele Barbato
- Department of Clinical and Molecular Medicine, School of Medicine and Psychology, Sapienza University, Rome, Italy
| | - Massimo Volpe
- Department of Clinical and Molecular Medicine, School of Medicine and Psychology, Sapienza University, Rome, Italy
- IRCCS S. Raffaele, Rome, Italy
| | - Speranza Rubattu
- Department of Clinical and Molecular Medicine, School of Medicine and Psychology, Sapienza University, Rome, Italy.
- IRCCS Neuromed, Pozzilli (Is), Italy.
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6
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Mise K, Long J, Galvan DL, Ye Z, Fan G, Serysheva II, Moore TI, Wada J, Schumacker PT, Chang BH, Danesh FR. NDUFS4 Regulates Cristae Remodeling in Diabetic Kidney Disease. Res Sq 2023:rs.3.rs-3070079. [PMID: 37461606 PMCID: PMC10350115 DOI: 10.21203/rs.3.rs-3070079/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/24/2023]
Abstract
The mitochondrial electron transport chain (ETC) is a highly adaptive process to meet metabolic demands of the cell, and its dysregulation has been associated with diverse clinical pathologies. However, the role and nature of impaired ETC in kidney diseases remains poorly understood. Here, we generated diabetic mice with podocyte-specific overexpression of Ndufs4, an accessory subunit of mitochondrial complex I, as a model to investigate the role of ETC integrity in diabetic kidney disease (DKD). We find that these conditional mice exhibit significant improvements in cristae morphology, mitochondrial dynamics, and albuminuria. By coupling proximity labeling with super-resolution imaging, we also identify the role of cristae shaping proteins in linking NDUFS4 with improved cristae morphology. Taken together, we discover the central role of NDUFS4 as a powerful regulator of cristae remodeling, respiratory supercomplexes assembly, and mitochondrial ultrastructure in vitro and in vivo. We propose that targeting NDUFS4 represents a promising approach to slow the progression of DKD.
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Affiliation(s)
- Koki Mise
- Section of Nephrology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Nephrology, Rheumatology, Endocrinology & Metabolism, Okayama University Graduate School of Medicine, Dentistry & Pharmaceutical Sciences, Okayama, Japan
| | - Jianyin Long
- Section of Nephrology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Daniel L. Galvan
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Zengchun Ye
- Division of Nephrology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Guizhen Fan
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Irina I. Serysheva
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Travis I. Moore
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Jun Wada
- Department of Nephrology, Rheumatology, Endocrinology & Metabolism, Okayama University Graduate School of Medicine, Dentistry & Pharmaceutical Sciences, Okayama, Japan
| | - Paul T. Schumacker
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Benny H. Chang
- Section of Nephrology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Farhad R. Danesh
- Section of Nephrology, The University of Texas MD Anderson Cancer Center, Houston, Texas
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX
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7
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Chella Krishnan K, El Hachem EJ, Keller MP, Patel SG, Carroll L, Vegas AD, Gerdes Gyuricza I, Light C, Cao Y, Pan C, Kaczor-Urbanowicz KE, Shravah V, Anum D, Pellegrini M, Lee CF, Seldin MM, Rosenthal NA, Churchill GA, Attie AD, Parker B, James DE, Lusis AJ. Genetic architecture of heart mitochondrial proteome influencing cardiac hypertrophy. eLife 2023; 12:e82619. [PMID: 37276142 PMCID: PMC10241513 DOI: 10.7554/elife.82619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 05/18/2023] [Indexed: 06/07/2023] Open
Abstract
Mitochondria play an important role in both normal heart function and disease etiology. We report analysis of common genetic variations contributing to mitochondrial and heart functions using an integrative proteomics approach in a panel of inbred mouse strains called the Hybrid Mouse Diversity Panel (HMDP). We performed a whole heart proteome study in the HMDP (72 strains, n=2-3 mice) and retrieved 848 mitochondrial proteins (quantified in ≥50 strains). High-resolution association mapping on their relative abundance levels revealed three trans-acting genetic loci on chromosomes (chr) 7, 13 and 17 that regulate distinct classes of mitochondrial proteins as well as cardiac hypertrophy. DAVID enrichment analyses of genes regulated by each of the loci revealed that the chr13 locus was highly enriched for complex-I proteins (24 proteins, P=2.2E-61), the chr17 locus for mitochondrial ribonucleoprotein complex (17 proteins, P=3.1E-25) and the chr7 locus for ubiquinone biosynthesis (3 proteins, P=6.9E-05). Follow-up high resolution regional mapping identified NDUFS4, LRPPRC and COQ7 as the candidate genes for chr13, chr17 and chr7 loci, respectively, and both experimental and statistical analyses supported their causal roles. Furthermore, a large cohort of Diversity Outbred mice was used to corroborate Lrpprc gene as a driver of mitochondrial DNA (mtDNA)-encoded gene regulation, and to show that the chr17 locus is specific to heart. Variations in all three loci were associated with heart mass in at least one of two independent heart stress models, namely, isoproterenol-induced heart failure and diet-induced obesity. These findings suggest that common variations in certain mitochondrial proteins can act in trans to influence tissue-specific mitochondrial functions and contribute to heart hypertrophy, elucidating mechanisms that may underlie genetic susceptibility to heart failure in human populations.
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Affiliation(s)
- Karthickeyan Chella Krishnan
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of MedicineCincinnatiUnited States
| | - Elie-Julien El Hachem
- Department of Integrative Biology and Physiology, Field Systems Biology, Sciences Sorbonne UniversitéParisFrance
| | - Mark P Keller
- Biochemistry Department, University of Wisconsin-MadisonMadisonUnited States
| | - Sanjeet G Patel
- Department of Surgery/Division of Cardiac Surgery, University of Southern California Keck School of MedicineLos AngelesUnited States
| | - Luke Carroll
- Metabolic Systems Biology Laboratory, Charles Perkins Centre, School of Life and Environmental Sciences, University of SydneySydneyAustralia
| | - Alexis Diaz Vegas
- Metabolic Systems Biology Laboratory, Charles Perkins Centre, School of Life and Environmental Sciences, University of SydneySydneyAustralia
| | | | - Christine Light
- Cardiovascular Biology Research Program, Oklahoma Medical Research FoundationOklahoma CityUnited States
| | - Yang Cao
- Department of Medicine/Division of Cardiology, University of California, Los AngelesLos AngelesUnited States
| | - Calvin Pan
- Department of Medicine/Division of Cardiology, University of California, Los AngelesLos AngelesUnited States
| | - Karolina Elżbieta Kaczor-Urbanowicz
- Division of Oral Biology and Medicine, UCLA School of DentistryLos AngelesUnited States
- UCLA Institute for Quantitative and Computational BiosciencesLos AngelesUnited States
| | - Varun Shravah
- Department of Chemistry, University of CaliforniaLos AngelesUnited States
| | - Diana Anum
- Department of Integrative Biology and Physiology, University of CaliforniaLos AngelesUnited States
| | - Matteo Pellegrini
- UCLA Institute for Quantitative and Computational BiosciencesLos AngelesUnited States
| | - Chi Fung Lee
- Cardiovascular Biology Research Program, Oklahoma Medical Research FoundationOklahoma CityUnited States
- Department of Physiology, University of Oklahoma Health Sciences CenterOklahoma CityUnited States
| | - Marcus M Seldin
- Center for Epigenetics and MetabolismIrvineUnited States
- Department of Biological Chemistry, University of CaliforniaIrvineUnited States
| | | | | | - Alan D Attie
- Biochemistry Department, University of Wisconsin-MadisonMadisonUnited States
| | - Benjamin Parker
- Department of Anatomy and Physiology, University of MelbourneMelbourneAustralia
| | - David E James
- Metabolic Systems Biology Laboratory, Charles Perkins Centre, School of Life and Environmental Sciences, University of SydneySydneyAustralia
| | - Aldons J Lusis
- Department of Medicine/Division of Cardiology, University of California, Los AngelesLos AngelesUnited States
- Department of Human Genetics, University of CaliforniaLos AngelesUnited States
- Department of Microbiology, Immunology and Molecular Genetics, University of CaliforniaLos AngelesUnited States
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8
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Chen B, Daneshgar N, Lee HC, Song LS, Dai DF. Mitochondrial Oxidative Stress Mediates Bradyarrhythmia in Leigh Syndrome Mitochondrial Disease Mice. Antioxidants (Basel) 2023; 12:antiox12051001. [PMID: 37237867 PMCID: PMC10215409 DOI: 10.3390/antiox12051001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/21/2023] [Accepted: 04/23/2023] [Indexed: 05/28/2023] Open
Abstract
Mitochondrial oxidative stress has been implicated in aging and several cardiovascular diseases, including heart failure and cardiomyopathy, ventricular tachycardia, and atrial fibrillation. The role of mitochondrial oxidative stress in bradyarrhythmia is less clear. Mice with a germline deletion of Ndufs4 subunit respiratory complex I develop severe mitochondrial encephalomyopathy resembling Leigh Syndrome (LS). Several types of cardiac bradyarrhythmia are present in LS mice, including a frequent sinus node dysfunction and episodic atrioventricular (AV) block. Treatment with the mitochondrial antioxidant Mitotempo or mitochondrial protective peptide SS31 significantly ameliorated the bradyarrhythmia and extended the lifespan of LS mice. Using an ex vivo Langendorff perfused heart with live confocal imaging of mitochondrial and total cellular reactive oxygen species (ROS), we showed increased ROS in the LS heart, which was potentiated by ischemia-reperfusion. A simultaneous ECG recording showed a sinus node dysfunction and AV block concurrent with the severity of the oxidative stress. Treatment with Mitotempo abolished ROS and restored the sinus rhythm. Our study reveals robust evidence of the direct mechanistic roles of mitochondrial and total ROS in bradyarrhythmia in the setting of LS mitochondrial cardiomyopathy. Our study also supports the potential clinical application of mitochondrial-targeted antioxidants or SS31 for the treatment of LS patients.
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Affiliation(s)
- Biyi Chen
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Nastaran Daneshgar
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Hsiang-Chun Lee
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Lipid Science and Aging Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Long-Sheng Song
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Dao-Fu Dai
- Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
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9
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Yoon J, Daneshgar N, Chu Y, Chen B, Hefti M, Vikram A, Irani K, Song L, Brenner C, Abel ED, London B, Dai D. Metabolic rescue ameliorates mitochondrial encephalo-cardiomyopathy in murine and human iPSC models of Leigh syndrome. Clin Transl Med 2022; 12:e954. [PMID: 35872650 PMCID: PMC9309541 DOI: 10.1002/ctm2.954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 06/09/2022] [Accepted: 06/15/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Mice with deletion of complex I subunit Ndufs4 develop mitochondrial encephalomyopathy resembling Leigh syndrome (LS). The metabolic derangement and underlying mechanisms of cardio-encephalomyopathy in LS remains incompletely understood. METHODS We performed echocardiography, electrophysiology, confocal microscopy, metabolic and molecular/morphometric analysis of the mice lacking Ndufs4. HEK293 cells, human iPS cells-derived cardiomyocytes and neurons were used to determine the mechanistic role of mitochondrial complex I deficiency. RESULTS LS mice develop severe cardiac bradyarrhythmia and diastolic dysfunction. Human-induced pluripotent stem cell-derived cardiomyocytes (iPS-CMs) with Ndufs4 deletion recapitulate LS cardiomyopathy. Mechanistically, we demonstrate a direct link between complex I deficiency, decreased intracellular (nicotinamide adenine dinucleotide) NAD+ /NADH and bradyarrhythmia, mediated by hyperacetylation of the cardiac sodium channel NaV 1.5, particularly at K1479 site. Neuronal apoptosis in the cerebellar and midbrain regions in LS mice was associated with hyperacetylation of p53 and activation of microglia. Targeted metabolomics revealed increases in several amino acids and citric acid cycle intermediates, likely due to impairment of NAD+ -dependent dehydrogenases, and a substantial decrease in reduced Glutathione (GSH). Metabolic rescue by nicotinamide riboside (NR) supplementation increased intracellular NAD+ / NADH, restored metabolic derangement, reversed protein hyperacetylation through NAD+ -dependent Sirtuin deacetylase, and ameliorated cardiomyopathic phenotypes, concomitant with improvement of NaV 1.5 current and SERCA2a function measured by Ca2+ -transients. NR also attenuated neuronal apoptosis and microglial activation in the LS brain and human iPS-derived neurons with Ndufs4 deletion. CONCLUSIONS Our study reveals direct mechanistic explanations of the observed cardiac bradyarrhythmia, diastolic dysfunction and neuronal apoptosis in mouse and human induced pluripotent stem cells (iPSC) models of LS.
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Affiliation(s)
- Jin‐Young Yoon
- Division of Cardiovascular Medicine, Department of Internal MedicineUniversity of Iowa Carver College of MedicineIowa CityIowaUSA
- Abboud Cardiovascular Research Center, University of Iowa Carver College of MedicineIowa CityIowaUSA
| | - Nastaran Daneshgar
- Department of Pathology, Carver College of MedicineUniversity of IowaIowa CityIowaUSA
| | - Yi Chu
- Department of Pathology, Carver College of MedicineUniversity of IowaIowa CityIowaUSA
| | - Biyi Chen
- Division of Cardiovascular Medicine, Department of Internal MedicineUniversity of Iowa Carver College of MedicineIowa CityIowaUSA
- Abboud Cardiovascular Research Center, University of Iowa Carver College of MedicineIowa CityIowaUSA
| | - Marco Hefti
- Department of Pathology, Carver College of MedicineUniversity of IowaIowa CityIowaUSA
| | - Ajit Vikram
- Division of Cardiovascular Medicine, Department of Internal MedicineUniversity of Iowa Carver College of MedicineIowa CityIowaUSA
| | - Kaikobad Irani
- Division of Cardiovascular Medicine, Department of Internal MedicineUniversity of Iowa Carver College of MedicineIowa CityIowaUSA
- Abboud Cardiovascular Research Center, University of Iowa Carver College of MedicineIowa CityIowaUSA
| | - Long‐Sheng Song
- Division of Cardiovascular Medicine, Department of Internal MedicineUniversity of Iowa Carver College of MedicineIowa CityIowaUSA
- Abboud Cardiovascular Research Center, University of Iowa Carver College of MedicineIowa CityIowaUSA
| | - Charles Brenner
- Department of Diabetes & Cancer MetabolismCity of Hope National Medical CenterDuarteCaliforniaUSA
| | - E. Dale Abel
- Fraternal Order of Eagles Diabetes Research Center and Division of Endocrinology and Metabolism, Department of Internal MedicineUniversity of Iowa Carver College of Medicine, University of IowaIowa CityIowaUSA
| | - Barry London
- Division of Cardiovascular Medicine, Department of Internal MedicineUniversity of Iowa Carver College of MedicineIowa CityIowaUSA
- Abboud Cardiovascular Research Center, University of Iowa Carver College of MedicineIowa CityIowaUSA
| | - Dao‐Fu Dai
- Department of Pathology, Carver College of MedicineUniversity of IowaIowa CityIowaUSA
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10
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Fulghum KL, Smith JB, Chariker J, Garrett LF, Brittian KR, Lorkiewicz P, McNally LA, Uchida S, Jones SP, Hill BG, Collins HE. Metabolic Signatures of Pregnancy-Induced Cardiac Growth. Am J Physiol Heart Circ Physiol 2022; 323:H146-H164. [PMID: 35622533 DOI: 10.1152/ajpheart.00105.2022] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The goal of this study was to develop an atlas of the metabolic, transcriptional, and proteomic changes that occur with pregnancy in the maternal heart. Timed pregnancy studies in FVB/NJ mice revealed significant increases in heart size by day 8 of pregnancy (mid-pregnancy; MP), which was sustained throughout the rest of the term compared with non-pregnant controls. Cardiac hypertrophy and myocyte cross-sectional area were highest 7 d after birth (post-birth; PB) and were associated with significant increases in end-diastolic and end-systolic left ventricular volumes and cardiac output. Metabolomics analyses revealed that, by day 16 of pregnancy (late pregnancy; LP), metabolites associated with nitric oxide production as well as acylcholines, sphingomyelins, and fatty acid species were elevated, which coincided with a lower activation state of phosphofructokinase and higher levels of pyruvate dehydrogenase kinase 4 (Pdk4). In the postpartum period, urea cycle metabolites, polyamines, and phospholipid levels were markedly elevated in the maternal heart. Cardiac transcriptomics in LP revealed significant increases in not only Pdk4, but also genes that regulate glutamate and ketone body oxidation, which were preceded in MP by higher expression of transcripts controlling cell proliferation and angiogenesis. Proteomics analysis of the maternal heart in LP and PB revealed significant reductions in several contractile filaments and mitochondrial complex subunits. Collectively, these findings describe the coordinated molecular changes that occur in the maternal heart during and after pregnancy.
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Affiliation(s)
- Kyle L Fulghum
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Juliette B Smith
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Julia Chariker
- KY INBRE Genomics Core, University of Louisville, Louisville, KY, United States
| | - Lauren F Garrett
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Kenneth R Brittian
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Pawel Lorkiewicz
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Lindsey A McNally
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Shizuka Uchida
- Center for RNA Medicine, Department of Clinical Medicine, Aalborg University, Copenhagen, Denmark
| | - Steven P Jones
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Bradford G Hill
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
| | - Helen E Collins
- Diabetes and Obesity Center, Christina Lee Brown Envirome Institute, Division of Environmental Medicine, Department of Medicine, University of Louisville, Louisville, KY, United States
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11
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Mou Q, Jia Z, Luo M, Liu L, Huang X, Quan J, Tian J. Epigallocatechin-3-gallate exerts cardioprotective effects related to energy metabolism in pressure overload-induced cardiac dysfunction. Arch Biochem Biophys 2022. [DOI: 10.1016/j.abb.2022.109217] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 04/06/2022] [Accepted: 04/08/2022] [Indexed: 01/14/2023]
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12
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van de Wal MAE, Adjobo-Hermans MJW, Keijer J, Schirris TJJ, Homberg JR, Wieckowski MR, Grefte S, van Schothorst EM, van Karnebeek C, Quintana A, Koopman WJH. Ndufs4 knockout mouse models of Leigh syndrome: pathophysiology and intervention. Brain 2022. [PMID: 34849584 DOI: 10.1093/brain/awab426%jbrain] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
Mitochondria are small cellular constituents that generate cellular energy (ATP) by oxidative phosphorylation (OXPHOS). Dysfunction of these organelles is linked to a heterogeneous group of multisystemic disorders, including diabetes, cancer, ageing-related pathologies and rare mitochondrial diseases. With respect to the latter, mutations in subunit-encoding genes and assembly factors of the first OXPHOS complex (complex I) induce isolated complex I deficiency and Leigh syndrome. This syndrome is an early-onset, often fatal, encephalopathy with a variable clinical presentation and poor prognosis due to the lack of effective intervention strategies. Mutations in the nuclear DNA-encoded NDUFS4 gene, encoding the NADH:ubiquinone oxidoreductase subunit S4 (NDUFS4) of complex I, induce 'mitochondrial complex I deficiency, nuclear type 1' (MC1DN1) and Leigh syndrome in paediatric patients. A variety of (tissue-specific) Ndufs4 knockout mouse models were developed to study the Leigh syndrome pathomechanism and intervention testing. Here, we review and discuss the role of complex I and NDUFS4 mutations in human mitochondrial disease, and review how the analysis of Ndufs4 knockout mouse models has generated new insights into the MC1ND1/Leigh syndrome pathomechanism and its therapeutic targeting.
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Affiliation(s)
- Melissa A E van de Wal
- Department of Pediatrics, Amalia Children's Hospital, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
| | | | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
| | - Tom J J Schirris
- Department of Pharmacology and Toxicology, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
| | - Judith R Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboudumc, Nijmegen, The Netherlands
| | - Mariusz R Wieckowski
- Laboratory of Mitochondrial Biology and Metabolism, Nencki Institute of Experimental Biology, Warsaw, Poland
| | - Sander Grefte
- Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
| | | | - Clara van Karnebeek
- Department of Pediatrics, Amalia Children's Hospital, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
- Department of Pediatrics, Emma Personalized Medicine Center, Emma Children's Hospital, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Department of Human Genetics, Emma Personalized Medicine Center, Emma Children's Hospital, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Albert Quintana
- Mitochondrial Neuropathology Laboratory, Institut de Neurociències and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Werner J H Koopman
- Department of Pediatrics, Amalia Children's Hospital, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
- Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
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13
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Johnson BB, Reinhold J, Holmes TL, Moore JA, Cowell V, Bernardo AS, Rushworth SA, Vassiliou V, Smith JGW. Modelling Metabolic Shifts during Cardiomyocyte Differentiation, Iron Deficiency and Transferrin Rescue Using Human Pluripotent Stem Cells. Metabolites 2021; 12:9. [PMID: 35050131 DOI: 10.3390/metabo12010009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/03/2021] [Accepted: 12/20/2021] [Indexed: 01/13/2023] Open
Abstract
Cardiomyocytes rely on specialised metabolism to meet the high energy demand of the heart. During heart development, metabolism matures and shifts from the predominant utilisation of glycolysis and glutamine oxidation towards lactate and fatty acid oxidation. Iron deficiency (ID) leads to cellular metabolism perturbations. However, the exact alterations in substrate metabolism during ID are poorly defined. Using human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CM), the present study investigated changes in major metabolic substrate utilisation in the context of ID or upon transferrin rescue. Typically, during hiPSC-CM differentiation, the greatest increase in total metabolic output and rate was seen in fatty acid metabolism. When ID was induced, hiPSC-CMs displayed increased reliance on glycolytic metabolism, and six TCA cycle, five amino acid, and four fatty acid substrates were significantly impaired. Transferrin rescue was able to improve TCA cycle substrate metabolism, but the amino acid and fatty acid metabolism remained perturbed. Replenishing iron stores partially reverses the adverse metabolic changes that occur during ID. Understanding the changes in metabolic substrate utilisation and their modification may provide potential for discovery of new biomarkers and therapeutic targets in cardiovascular diseases.
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14
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van de Wal M, Adjobo-Hermans M, Keijer J, Schirris T, Homberg J, Wieckowski MR, Grefte S, van Schothorst EM, van Karnebeek C, Quintana A, Koopman WJH. Ndufs4 knockout mouse models of Leigh syndrome: pathophysiology and intervention. Brain 2021; 145:45-63. [PMID: 34849584 PMCID: PMC8967107 DOI: 10.1093/brain/awab426] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/25/2021] [Accepted: 11/11/2021] [Indexed: 11/14/2022] Open
Abstract
Mitochondria are small cellular constituents that generate cellular energy (ATP) by oxidative phosphorylation (OXPHOS). Dysfunction of these organelles is linked to a heterogeneous group of multisystemic disorders, including diabetes, cancer, ageing-related pathologies and rare mitochondrial diseases. With respect to the latter, mutations in subunit-encoding genes and assembly factors of the first OXPHOS complex (complex I) induce isolated complex I deficiency and Leigh syndrome. This syndrome is an early-onset, often fatal, encephalopathy with a variable clinical presentation and poor prognosis due to the lack of effective intervention strategies. Mutations in the nuclear DNA-encoded NDUFS4 gene, encoding the NADH:ubiquinone oxidoreductase subunit S4 (NDUFS4) of complex I, induce ‘mitochondrial complex I deficiency, nuclear type 1’ (MC1DN1) and Leigh syndrome in paediatric patients. A variety of (tissue-specific) Ndufs4 knockout mouse models were developed to study the Leigh syndrome pathomechanism and intervention testing. Here, we review and discuss the role of complex I and NDUFS4 mutations in human mitochondrial disease, and review how the analysis of Ndufs4 knockout mouse models has generated new insights into the MC1ND1/Leigh syndrome pathomechanism and its therapeutic targeting.
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Affiliation(s)
- Melissa van de Wal
- Department of Pediatrics, Amalia Children's Hospital, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
| | - Merel Adjobo-Hermans
- Department of Biochemistry (286), RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
| | - Tom Schirris
- Department of Pharmacology and Toxicology, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands
| | - Judith Homberg
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboudumc, Nijmegen, The Netherlands
| | - Mariusz R Wieckowski
- Laboratory of Mitochondrial Biology and Metabolism, Nencki Institute of Experimental Biology, Warsaw, Poland
| | - Sander Grefte
- Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
| | | | - Clara van Karnebeek
- Department of Pediatrics, Amalia Children's Hospital, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands.,Department of Pediatrics, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Albert Quintana
- Mitochondrial Neuropathology Laboratory, Institut de Neurociències and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Werner J H Koopman
- Department of Pediatrics, Amalia Children's Hospital, RIMLS, RCMM, Radboudumc, Nijmegen, The Netherlands.,Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
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15
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Terburgh K, Lindeque JZ, van der Westhuizen FH, Louw R. Cross-comparison of systemic and tissue-specific metabolomes in a mouse model of Leigh syndrome. Metabolomics 2021; 17:101. [PMID: 34792662 DOI: 10.1007/s11306-021-01854-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 11/03/2021] [Indexed: 01/03/2023]
Abstract
INTRODUCTION The value of metabolomics in multi-systemic mitochondrial disease research has been increasingly recognized, with the ability to investigate a variety of biofluids and tissues considered a particular advantage. Although minimally invasive biofluids are the generally favored sample type, it remains unknown whether systemic metabolomes provide a clear reflection of tissue-specific metabolic alterations. OBJECTIVES Here we cross-compare urine and tissue-specific metabolomes in the Ndufs4 knockout mouse model of Leigh syndrome-a complex neurometabolic MD defined by progressive focal lesions in specific brain regions-to identify and evaluate the extent of common and unique metabolic alterations on a systemic and brain regional level. METHODS Untargeted and semi-targeted multi-platform metabolomics were performed on urine, four brain regions, and two muscle types of Ndufs4 KO (n≥19) vs wildtype (n≥20) mice. RESULTS Widespread alterations were evident in alanine, aspartate, glutamate, and arginine metabolism in Ndufs4 KO mice; while brain-region specific metabolic signatures include the accumulation of branched-chain amino acids, proline, and glycolytic intermediates. Furthermore, we describe a systemic dysregulation in one-carbon metabolism and the tricarboxylic acid cycle, which was not clearly reflected in the Ndufs4 KO brain. CONCLUSION Our results confirm the value of urinary metabolomics when evaluating MD-associated metabolites, while cautioning against mechanistic studies relying solely on systemic biofluids.
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Affiliation(s)
- Karin Terburgh
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), Private Bag X6001, Potchefstroom, South Africa
| | - Jeremie Z Lindeque
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), Private Bag X6001, Potchefstroom, South Africa
| | - Francois H van der Westhuizen
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), Private Bag X6001, Potchefstroom, South Africa
| | - Roan Louw
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), Private Bag X6001, Potchefstroom, South Africa.
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16
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Chella Krishnan K, Vergnes L, Acín-Pérez R, Stiles L, Shum M, Ma L, Mouisel E, Pan C, Moore TM, Péterfy M, Romanoski CE, Reue K, Björkegren JLM, Laakso M, Liesa M, Lusis AJ. Sex-specific genetic regulation of adipose mitochondria and metabolic syndrome by Ndufv2. Nat Metab 2021; 3:1552-1568. [PMID: 34697471 PMCID: PMC8909918 DOI: 10.1038/s42255-021-00481-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 09/17/2021] [Indexed: 12/28/2022]
Abstract
We have previously suggested a central role for mitochondria in the observed sex differences in metabolic traits. However, the mechanisms by which sex differences affect adipose mitochondrial function and metabolic syndrome are unclear. Here we show that in both mice and humans, adipose mitochondrial functions are elevated in females and are strongly associated with adiposity, insulin resistance and plasma lipids. Using a panel of diverse inbred strains of mice, we identify a genetic locus on mouse chromosome 17 that controls mitochondrial mass and function in adipose tissue in a sex- and tissue-specific manner. This locus contains Ndufv2 and regulates the expression of at least 89 mitochondrial genes in females, including oxidative phosphorylation genes and those related to mitochondrial DNA content. Overexpression studies indicate that Ndufv2 mediates these effects by regulating supercomplex assembly and elevating mitochondrial reactive oxygen species production, which generates a signal that increases mitochondrial biogenesis.
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Affiliation(s)
- Karthickeyan Chella Krishnan
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, CA, USA.
| | - Laurent Vergnes
- Department of Human Genetics, University of California, Los Angeles, Los Angeles, CA, USA
| | - Rebeca Acín-Pérez
- Department of Medicine/Division of Endocrinology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Linsey Stiles
- Department of Medicine/Division of Endocrinology, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Michael Shum
- Department of Medicine/Division of Endocrinology, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular Medicine, Faculty of Medicine, Universite Laval, Quebec City, Quebec, Canada
| | - Lijiang Ma
- Department of Genetics and Genomic Sciences, The Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Etienne Mouisel
- INSERM, UMR1297, Institute of Metabolic and Cardiovascular Diseases, University of Toulouse, Paul Sabatier University, Toulouse, France
| | - Calvin Pan
- Department of Human Genetics, University of California, Los Angeles, Los Angeles, CA, USA
| | - Timothy M Moore
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, CA, USA
| | - Miklós Péterfy
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, CA, USA
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA, USA
| | - Casey E Romanoski
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
| | - Karen Reue
- Department of Human Genetics, University of California, Los Angeles, Los Angeles, CA, USA
| | - Johan L M Björkegren
- Department of Genetics and Genomic Sciences, The Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Integrated Cardio Metabolic Centre, Department of Medicine, Karolinska Institutet, Karolinska Universitetssjukhuset, Huddinge, Sweden
| | - Markku Laakso
- Institute of Clinical Medicine, Internal Medicine, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
| | - Marc Liesa
- Department of Medicine/Division of Endocrinology, University of California, Los Angeles, Los Angeles, CA, USA
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Aldons J Lusis
- Department of Medicine/Division of Cardiology, University of California, Los Angeles, CA, USA.
- Department of Human Genetics, University of California, Los Angeles, Los Angeles, CA, USA.
- Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA, USA.
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17
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Terburgh K, Coetzer J, Lindeque JZ, van der Westhuizen FH, Louw R. Aberrant BCAA and glutamate metabolism linked to regional neurodegeneration in a mouse model of Leigh syndrome. Biochim Biophys Acta Mol Basis Dis 2021; 1867:166082. [PMID: 33486097 DOI: 10.1016/j.bbadis.2021.166082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/23/2020] [Accepted: 01/16/2021] [Indexed: 02/07/2023]
Abstract
The dysfunction of respiratory chain complex I (CI) is the most common form of mitochondrial disease that most often presents as Leigh syndrome (LS) in children - a severe neurometabolic disorder defined by progressive focal lesions in specific brain regions. The mechanisms underlying this region-specific vulnerability to CI deficiency, however, remain elusive. Here, we examined brain regional respiratory chain enzyme activities and metabolic profiles in a mouse model of LS with global CI deficiency to gain insight into regional vulnerability to neurodegeneration. One lesion-resistant and three lesion-prone brain regions were investigated in Ndufs4 knockout (KO) mice at the late stage of LS. Enzyme assays confirmed significantly decreased (60-80%) CI activity in all investigated KO brain regions, with the lesion-resistant region displaying the highest residual CI activity (38% of wild type). A higher residual CI activity, and a less perturbed NADH/NAD+ ratio, correlate with less severe metabolic perturbations in KO brain regions. Moreover, less perturbed BCAA oxidation and increased glutamate oxidation seem to distinguish lesion-resistant from -prone KO brain regions, thereby identifying key areas of metabolism to target in future therapeutic intervention studies.
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Affiliation(s)
- Karin Terburgh
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), South Africa
| | - Janeé Coetzer
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), South Africa
| | - Jeremy Z Lindeque
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), South Africa
| | - Francois H van der Westhuizen
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), South Africa
| | - Roan Louw
- Human Metabolomics, Faculty of Natural and Agricultural Sciences, North-West University (Potchefstroom Campus), South Africa.
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18
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Luczak ED, Wu Y, Granger JM, Joiner MLA, Wilson NR, Gupta A, Umapathi P, Murphy KR, Reyes Gaido OE, Sabet A, Corradini E, Tseng WW, Wang Y, Heck AJR, Wei AC, Weiss RG, Anderson ME. Mitochondrial CaMKII causes adverse metabolic reprogramming and dilated cardiomyopathy. Nat Commun 2020; 11:4416. [PMID: 32887881 PMCID: PMC7473864 DOI: 10.1038/s41467-020-18165-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 08/06/2020] [Indexed: 01/02/2023] Open
Abstract
Despite the clear association between myocardial injury, heart failure and depressed myocardial energetics, little is known about upstream signals responsible for remodeling myocardial metabolism after pathological stress. Here, we report increased mitochondrial calmodulin kinase II (CaMKII) activation and left ventricular dilation in mice one week after myocardial infarction (MI) surgery. By contrast, mice with genetic mitochondrial CaMKII inhibition are protected from left ventricular dilation and dysfunction after MI. Mice with myocardial and mitochondrial CaMKII overexpression (mtCaMKII) have severe dilated cardiomyopathy and decreased ATP that causes elevated cytoplasmic resting (diastolic) Ca2+ concentration and reduced mechanical performance. We map a metabolic pathway that rescues disease phenotypes in mtCaMKII mice, providing insights into physiological and pathological metabolic consequences of CaMKII signaling in mitochondria. Our findings suggest myocardial dilation, a disease phenotype lacking specific therapies, can be prevented by targeted replacement of mitochondrial creatine kinase or mitochondrial-targeted CaMKII inhibition.
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Affiliation(s)
- Elizabeth D Luczak
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Yuejin Wu
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jonathan M Granger
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mei-Ling A Joiner
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Nicholas R Wilson
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ashish Gupta
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Priya Umapathi
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kevin R Murphy
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Oscar E Reyes Gaido
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Amin Sabet
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Eleonora Corradini
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Wen-Wei Tseng
- Department of Electrical Engineering, Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
| | - Yibin Wang
- Departments of Anesthesiology, Physiology and Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - An-Chi Wei
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
- Department of Electrical Engineering, Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan.
| | - Robert G Weiss
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mark E Anderson
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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19
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Aishwarya R, Alam S, Abdullah CS, Morshed M, Nitu SS, Panchatcharam M, Miriyala S, Kevil CG, Bhuiyan MS. Pleiotropic effects of mdivi-1 in altering mitochondrial dynamics, respiration, and autophagy in cardiomyocytes. Redox Biol 2020; 36:101660. [PMID: 32750667 PMCID: PMC7396909 DOI: 10.1016/j.redox.2020.101660] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 07/02/2020] [Accepted: 07/24/2020] [Indexed: 12/22/2022] Open
Abstract
Mitochondria are highly dynamic organelles that constantly undergo fission and fusion events to adapt to changes in the cellular environment. Aberrant mitochondrial fission has been associated with several types of cardiovascular dysfunction; inhibition of pathologically aberrant mitochondrial fission has been shown to be cardioprotective. Pathological fission is mediated by the excessive activation of GTPase dynamin-related protein 1 (Drp1), making it an attractive therapeutic target in numerous cardiovascular diseases. Mitochondrial division inhibitor (mdivi-1) is widely used small molecule reported to inhibit Drp1-dependent fission, elongate mitochondria, and mitigate injury. The purpose of our study was to understand the pleiotropic effects of mdivi-1 on mitochondrial dynamics, mitochondrial respiration, electron transport activities, and macro-autophagy. In this study, we found that mdivi-1 treatment decreased Drp1 expression, proteolytically cleaved L-OPA1, and altered the expression of OXPHOS complex proteins, resulting in increased superoxide production. The altered expression of OXPHOS complex proteins may be directly associated with decreased Drp1 expression, as Drp1 siRNA knockdown in cardiomyocytes showed similar effects. Results from an autophagy flux assay showed that mdivi-1 induced impaired autophagy flux that could be restored by Atg7 overexpression, suggesting that mdivi-1 mediated inhibition of macro-autophagy in cardiomyocytes. Treatment with mdivi-1 resulted in increased expression of p62, which is required for Atg7 overexpression-induced rescue of mdivi-1-mediated impaired autophagy flux. In addition, mdivi-1-dependent proteolytic processing of L-OPA1 was associated with increased mitochondrial superoxide production and altered expression of mitochondrial serine/proteases. Overall, the novel pleiotropic effect of mdivi-1 in cardiomyocytes included proteolytically cleaved L-OPA1, altered expression of OXPHOS complex proteins, and increased superoxide production, which together resulted in defects in mitochondrial respiration and inhibition of macro-autophagy.
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Affiliation(s)
- Richa Aishwarya
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Shafiul Alam
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Chowdhury S Abdullah
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Mahboob Morshed
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Sadia S Nitu
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Manikandan Panchatcharam
- Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Sumitra Miriyala
- Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Christopher G Kevil
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA; Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA; Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA
| | - Md Shenuarin Bhuiyan
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA; Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center, Shreveport, LA, 71103, USA.
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Reynaud-Dulaurier R, Benegiamo G, Marrocco E, Al-Tannir R, Surace EM, Auwerx J, Decressac M. Gene replacement therapy provides benefit in an adult mouse model of Leigh syndrome. Brain 2020; 143:1686-1696. [DOI: 10.1093/brain/awaa105] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/24/2020] [Accepted: 02/12/2020] [Indexed: 01/10/2023] Open
Abstract
Abstract
Mutations in nuclear-encoded mitochondrial genes are responsible for a broad spectrum of disorders among which Leigh syndrome is the most common in infancy. No effective therapies are available for this severe disease mainly because of the limited capabilities of the standard adeno-associated viral (AAV) vectors to transduce both peripheral organs and the CNS when injected systemically in adults. Here, we used the brain-penetrating AAV-PHP.B vector to reinstate gene expression in the Ndufs4 knockout mouse model of Leigh syndrome. Intravenous delivery of an AAV.PHP.B-Ndufs4 vector in 1-month-old knockout mice restored mitochondrial complex I activity in several organs including the CNS. This gene replacement strategy extended lifespan, rescued metabolic parameters, provided behavioural improvement, and corrected the pathological phenotype in the brain, retina, and heart of Ndufs4 knockout mice. These results provide a robust proof that gene therapy strategies targeting multiple organs can rescue fatal neurometabolic disorders with CNS involvement.
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Affiliation(s)
- Robin Reynaud-Dulaurier
- Université Grenoble Alpes, Inserm, U1216, Grenoble Institut des Neurosciences, 38000 Grenoble, France
| | - Giorgia Benegiamo
- Laboratory for Integrative and Systems Physiology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Elena Marrocco
- Telethon Institute of Genetics and Medicine (TIGEM), 80078 Pozzuoli, Italy
| | - Racha Al-Tannir
- Université Grenoble Alpes, Inserm, U1216, Grenoble Institut des Neurosciences, 38000 Grenoble, France
| | - Enrico Maria Surace
- Telethon Institute of Genetics and Medicine (TIGEM), 80078 Pozzuoli, Italy
- Medical Genetics, Department of Translational Medicine, Federico II University, 80131 Naples, Italy
| | - Johan Auwerx
- Laboratory for Integrative and Systems Physiology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Michael Decressac
- Université Grenoble Alpes, Inserm, U1216, Grenoble Institut des Neurosciences, 38000 Grenoble, France
- Telethon Institute of Genetics and Medicine (TIGEM), 80078 Pozzuoli, Italy
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21
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Ježek P, Holendová B, Plecitá-Hlavatá L. Redox Signaling from Mitochondria: Signal Propagation and Its Targets. Biomolecules 2020; 10:E93. [PMID: 31935965 DOI: 10.3390/biom10010093] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/02/2020] [Accepted: 01/02/2020] [Indexed: 02/07/2023] Open
Abstract
Progress in mass spectroscopy of posttranslational oxidative modifications has enabled researchers to experimentally verify the concept of redox signaling. We focus here on redox signaling originating from mitochondria under physiological situations, discussing mechanisms of transient redox burst in mitochondria, as well as the possible ways to transfer such redox signals to specific extramitochondrial targets. A role of peroxiredoxins is described which enables redox relay to other targets. Examples of mitochondrial redox signaling are discussed: initiation of hypoxia-inducible factor (HIF) responses; retrograde redox signaling to PGC1α during exercise in skeletal muscle; redox signaling in innate immune cells; redox stimulation of insulin secretion, and other physiological situations.
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Abstract
Cardiac ageing manifests as a decline in function leading to heart failure. At the cellular level, ageing entails decreased replicative capacity and dysregulation of cellular processes in myocardial and nonmyocyte cells. Various extrinsic parameters, such as lifestyle and environment, integrate important signalling pathways, such as those involving inflammation and oxidative stress, with intrinsic molecular mechanisms underlying resistance versus progression to cellular senescence. Mitigation of cardiac functional decline in an ageing organism requires the activation of enhanced maintenance and reparative capacity, thereby overcoming inherent endogenous limitations to retaining a youthful phenotype. Deciphering the molecular mechanisms underlying dysregulation of cellular function and renewal reveals potential interventional targets to attenuate degenerative processes at the cellular and systemic levels to improve quality of life for our ageing population. In this Review, we discuss the roles of extrinsic and intrinsic factors in cardiac ageing. Animal models of cardiac ageing are summarized, followed by an overview of the current and possible future treatments to mitigate the deleterious effects of cardiac ageing.
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23
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Forte M, Palmerio S, Bianchi F, Volpe M, Rubattu S. Mitochondrial complex I deficiency and cardiovascular diseases: current evidence and future directions. J Mol Med (Berl) 2019; 97:579-91. [PMID: 30863992 DOI: 10.1007/s00109-019-01771-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/06/2019] [Accepted: 03/05/2019] [Indexed: 02/06/2023]
Abstract
Compelling evidence demonstrates the emerging role of mitochondrial complex I deficiency in the onset and development of cardiovascular diseases (CVDs). In particular, defects in single subunits of mitochondrial complex I have been associated with cardiac hypertrophy, ischemia/reperfusion injury, as well as diabetic complications and stroke in pre-clinical studies. Moreover, data obtained in humans revealed that genes coding for complex I proteins were associated with different CVDs. In this review, we discuss recent experimental studies that underline the contributory role of mitochondrial complex I deficiency in the etiopathogenesis of several CVDs, with a particular focus on those involving loss of function models of mitochondrial complex I. We also discuss human studies and potential therapeutic strategies able to rescue mitochondrial function in CVDs.
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24
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Schleifer G, Marutani E, Ferrari M, Sharma R, Skinner O, Goldberger O, Grange RMH, Peneyra K, Malhotra R, Wepler M, Ichinose F, Bloch DB, Mootha VK, Zapol WM. Impaired hypoxic pulmonary vasoconstriction in a mouse model of Leigh syndrome. Am J Physiol Lung Cell Mol Physiol 2018; 316:L391-L399. [PMID: 30520688 PMCID: PMC6397345 DOI: 10.1152/ajplung.00419.2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hypoxic pulmonary vasoconstriction (HPV) is a physiological vasomotor response that maintains systemic oxygenation by matching perfusion to ventilation during alveolar hypoxia. Although mitochondria appear to play an essential role in HPV, the impact of mitochondrial dysfunction on HPV remains incompletely defined. Mice lacking the mitochondrial complex I (CI) subunit Ndufs4 ( Ndufs4-/-) develop a fatal progressive encephalopathy and serve as a model for Leigh syndrome, the most common mitochondrial disease in children. Breathing normobaric 11% O2 prevents neurological disease and improves survival in Ndufs4-/- mice. In this study, we found that either genetic Ndufs4 deficiency or pharmacological inhibition of CI using piericidin A impaired the ability of left mainstem bronchus occlusion (LMBO) to induce HPV. In mice breathing air, the partial pressure of arterial oxygen during LMBO was lower in Ndufs4-/- and in piericidin A-treated Ndufs4+/+ mice than in respective controls. Impairment of HPV in Ndufs4-/- mice was not a result of nonspecific dysfunction of the pulmonary vascular contractile apparatus or pulmonary inflammation. In Ndufs4-deficient mice, 3 wk of breathing 11% O2 restored HPV in response to LMBO. When compared with Ndufs4-/- mice breathing air, chronic hypoxia improved systemic oxygenation during LMBO. The results of this study show that, when breathing air, mice with a congenital Ndufs4 deficiency or chemically inhibited CI function have impaired HPV. Our study raises the possibility that patients with inborn errors of mitochondrial function may also have defects in HPV.
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Affiliation(s)
- Grigorij Schleifer
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Eizo Marutani
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Michele Ferrari
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Rohit Sharma
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Owen Skinner
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Olga Goldberger
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Robert Matthew Henry Grange
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Kathryn Peneyra
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Rajeev Malhotra
- Cardiology Division and Cardiovascular Research Center, Department of Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Martin Wepler
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.,Institut für Anästhesiologische Pathophysiologie und Verfahrensentwicklung , Ulm , Germany
| | - Fumito Ichinose
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Donald B Bloch
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.,Division of Rheumatology, Allergy and Immunology, Department of Medicine, Harvard Medical School and Massachusetts General Hospital , Boston, Massachusetts
| | - Vamsi K Mootha
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Warren M Zapol
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
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Abstract
SIGNIFICANCE Mitochondria are the energetic, metabolic, redox, and information signaling centers of the cell. Substrate pressure, mitochondrial network dynamics, and cristae morphology state are integrated by the protonmotive force Δp or its potential component, ΔΨ, which are attenuated by proton backflux into the matrix, termed uncoupling. The mitochondrial uncoupling proteins (UCP1-5) play an eminent role in the regulation of each of the mentioned aspects, being involved in numerous physiological events including redox signaling. Recent Advances: UCP2 structure, including purine nucleotide and fatty acid (FA) binding sites, strongly support the FA cycling mechanism: UCP2 expels FA anions, whereas uncoupling is achieved by the membrane backflux of protonated FA. Nascent FAs, cleaved by phospholipases, are preferential. The resulting Δp dissipation decreases superoxide formation dependent on Δp. UCP-mediated antioxidant protection and its impairment are expected to play a major role in cell physiology and pathology. Moreover, UCP2-mediated aspartate, oxaloacetate, and malate antiport with phosphate is expected to alter metabolism of cancer cells. CRITICAL ISSUES A wide range of UCP antioxidant effects and participations in redox signaling have been reported; however, mechanisms of UCP activation are still debated. Switching off/on the UCP2 protonophoretic function might serve as redox signaling either by employing/releasing the extra capacity of cell antioxidant systems or by directly increasing/decreasing mitochondrial superoxide sources. Rapid UCP2 degradation, FA levels, elevation of purine nucleotides, decreased Mg2+, or increased pyruvate accumulation may initiate UCP-mediated redox signaling. FUTURE DIRECTIONS Issues such as UCP2 participation in glucose sensing, neuronal (synaptic) function, and immune cell activation should be elucidated. Antioxid. Redox Signal. 29, 667-714.
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Affiliation(s)
- Petr Ježek
- 1 Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences , Prague, Czech Republic
| | - Blanka Holendová
- 1 Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences , Prague, Czech Republic
| | - Keith D Garlid
- 2 UCLA Cardiovascular Research Laboratory, David Geffen School of Medicine at UCLA , Los Angeles, California
| | - Martin Jabůrek
- 1 Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences , Prague, Czech Republic
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26
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Wang K, Xu Y, Sun Q, Long J, Liu J, Ding J. Mitochondria regulate cardiac contraction through ATP-dependent and independent mechanisms. Free Radic Res 2018; 52:1256-1265. [PMID: 29544373 DOI: 10.1080/10715762.2018.1453137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The multipurpose organelle mitochondria play an essential role(s) in controlling cardiac muscle contraction. Mitochondria, not only function as the powerhouses and the energy source of myocytes but also modulate intracellular Ca2+ homeostasis, the production of intermediary metabolites/reactive oxygen species (ROS), and other cellular processes. Those molecular events can substantially influence myocardial contraction. Mitochondrial dysfunction is usually associated with cardiac remodelling, and is the causal factor of heart contraction defects in many cases. The manipulation of mitochondria or mitochondria-relevant pathways appears to be a promising therapeutic approach to treat the diseases.
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Affiliation(s)
- Kexin Wang
- a Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology & Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an , China
| | - Yang Xu
- a Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology & Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an , China
| | - Qiong Sun
- a Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology & Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an , China
| | - Jiangang Long
- a Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology & Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an , China
| | - Jiankang Liu
- a Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology & Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an , China
| | - Jian Ding
- a Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology & Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an , China
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27
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Zielonka J, Sikora A, Hardy M, Ouari O, Vasquez-Vivar J, Cheng G, Lopez M, Kalyanaraman B. Mitochondria-Targeted Triphenylphosphonium-Based Compounds: Syntheses, Mechanisms of Action, and Therapeutic and Diagnostic Applications. Chem Rev 2017; 117:10043-10120. [PMID: 28654243 PMCID: PMC5611849 DOI: 10.1021/acs.chemrev.7b00042] [Citation(s) in RCA: 879] [Impact Index Per Article: 125.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Mitochondria are recognized as one of the most important targets for new drug design in cancer, cardiovascular, and neurological diseases. Currently, the most effective way to deliver drugs specifically to mitochondria is by covalent linking a lipophilic cation such as an alkyltriphenylphosphonium moiety to a pharmacophore of interest. Other delocalized lipophilic cations, such as rhodamine, natural and synthetic mitochondria-targeting peptides, and nanoparticle vehicles, have also been used for mitochondrial delivery of small molecules. Depending on the approach used, and the cell and mitochondrial membrane potentials, more than 1000-fold higher mitochondrial concentration can be achieved. Mitochondrial targeting has been developed to study mitochondrial physiology and dysfunction and the interaction between mitochondria and other subcellular organelles and for treatment of a variety of diseases such as neurodegeneration and cancer. In this Review, we discuss efforts to target small-molecule compounds to mitochondria for probing mitochondria function, as diagnostic tools and potential therapeutics. We describe the physicochemical basis for mitochondrial accumulation of lipophilic cations, synthetic chemistry strategies to target compounds to mitochondria, mitochondrial probes, and sensors, and examples of mitochondrial targeting of bioactive compounds. Finally, we review published attempts to apply mitochondria-targeted agents for the treatment of cancer and neurodegenerative diseases.
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Affiliation(s)
- Jacek Zielonka
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
- Cancer Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
| | - Adam Sikora
- Institute of Applied Radiation Chemistry, Lodz University of Technology, ul. Wroblewskiego 15, 93-590 Lodz, Poland
| | - Micael Hardy
- Aix Marseille Univ, CNRS, ICR, UMR 7273, 13013 Marseille, France
| | - Olivier Ouari
- Aix Marseille Univ, CNRS, ICR, UMR 7273, 13013 Marseille, France
| | - Jeannette Vasquez-Vivar
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
| | - Gang Cheng
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
| | - Marcos Lopez
- Translational Biomedical Research Group, Biotechnology Laboratories, Cardiovascular Foundation of Colombia, Carrera 5a No. 6-33, Floridablanca, Santander, Colombia, 681003
- Graduate Program of Biomedical Sciences, Faculty of Health, Universidad del Valle, Calle 4B No. 36-00, Cali, Colombia, 760032
| | - Balaraman Kalyanaraman
- Department of Biophysics, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
- Free Radical Research Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
- Cancer Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, United States
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Plecitá-Hlavatá L, Tauber J, Li M, Zhang H, Flockton AR, Pullamsetti SS, Chelladurai P, D'Alessandro A, El Kasmi KC, Ježek P, Stenmark KR. Constitutive Reprogramming of Fibroblast Mitochondrial Metabolism in Pulmonary Hypertension. Am J Respir Cell Mol Biol 2017; 55:47-57. [PMID: 26699943 DOI: 10.1165/rcmb.2015-0142oc] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Remodeling of the distal pulmonary artery wall is a characteristic feature of pulmonary hypertension (PH). In hypoxic PH, the most substantial pathologic changes occur in the adventitia. Here, there is marked fibroblast proliferation and profound macrophage accumulation. These PH fibroblasts (PH-Fibs) maintain a hyperproliferative, apoptotic-resistant, and proinflammatory phenotype in ex vivo culture. Considering that a similar phenotype is observed in cancer cells, where it has been associated, at least in part, with specific alterations in mitochondrial metabolism, we sought to define the state of mitochondrial metabolism in PH-Fibs. In PH-Fibs, pyruvate dehydrogenase was markedly inhibited, resulting in metabolism of pyruvate to lactate, thus consistent with a Warburg-like phenotype. In addition, mitochondrial bioenergetics were suppressed and mitochondrial fragmentation was increased in PH-Fibs. Most importantly, complex I activity was substantially decreased, which was associated with down-regulation of the accessory subunit nicotinamide adenine dinucleotide reduced dehydrogenase (ubiquinone) Fe-S protein 4 (NDUFS4). Owing to less-efficient ATP synthesis, mitochondria were hyperpolarized and mitochondrial superoxide production was increased. This pro-oxidative status was further augmented by simultaneous induction of cytosolic nicotinamide adenine dinucleotide phosphate reduced oxidase 4. Although acute and chronic exposure to hypoxia of adventitial fibroblasts from healthy control vessels induced increased glycolysis, it did not induce complex I deficiency as observed in PH-Fibs. This suggests that hypoxia alone is insufficient to induce NDUFS4 down-regulation and constitutive abnormalities in complex I. In conclusion, our study provides evidence that, in the pathogenesis of vascular remodeling in PH, alterations in fibroblast mitochondrial metabolism drive distinct changes in cellular behavior, which potentially occur independently of hypoxia.
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Affiliation(s)
- Lydie Plecitá-Hlavatá
- 1 Department of Membrane Transport Biophysics, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Tauber
- 1 Department of Membrane Transport Biophysics, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Min Li
- 2 Developmental Lung Biology and Cardiovascular Pulmonary Research Laboratory, University of Colorado, Denver, Colorado
| | - Hui Zhang
- 2 Developmental Lung Biology and Cardiovascular Pulmonary Research Laboratory, University of Colorado, Denver, Colorado.,3 Department of Pediatrics, Shengjing Hospital of China Medical, University, Shenyang, China
| | - Amanda R Flockton
- 2 Developmental Lung Biology and Cardiovascular Pulmonary Research Laboratory, University of Colorado, Denver, Colorado
| | - Soni Savai Pullamsetti
- 4 Department of Lung Development and Remodeling, University of Giessen and Marburg Lung Center, Bad Nauheim, Germany; and
| | - Prakash Chelladurai
- 4 Department of Lung Development and Remodeling, University of Giessen and Marburg Lung Center, Bad Nauheim, Germany; and
| | | | - Karim C El Kasmi
- 6 Pediatric Gastroenterology, University of Colorado, Denver, Colorado
| | - Petr Ježek
- 1 Department of Membrane Transport Biophysics, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Kurt R Stenmark
- 2 Developmental Lung Biology and Cardiovascular Pulmonary Research Laboratory, University of Colorado, Denver, Colorado
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29
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Ferrari M, Jain IH, Goldberger O, Rezoagli E, Thoonen R, Cheng KH, Sosnovik DE, Scherrer-Crosbie M, Mootha VK, Zapol WM. Hypoxia treatment reverses neurodegenerative disease in a mouse model of Leigh syndrome. Proc Natl Acad Sci U S A 2017; 114:E4241-50. [PMID: 28483998 DOI: 10.1073/pnas.1621511114] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Inherited or acquired defects in mitochondria lead to devastating disorders for which we have no effective general therapies. We recently reported that breathing normobaric 11% O2 prevents neurodegeneration in a mouse model of a pediatric mitochondrial disease, Leigh syndrome. Here we provide updated survival curves of mice treated with varying doses of oxygen and explore eventual causes of death. We explore alternative hypoxia regimens and report that neither intermittent nor moderate hypoxia regimens suffice to prevent neurological disease. Finally, we show that hypoxia can not only prevent, but also reverses the brain lesions in mice with advanced neuropathology. Our preclinical studies will help guide future clinical studies aimed at harnessing hypoxia as a safe and practical therapy. The most common pediatric mitochondrial disease is Leigh syndrome, an episodic, subacute neurodegeneration that can lead to death within the first few years of life, for which there are no proven general therapies. Mice lacking the complex I subunit, Ndufs4, develop a fatal progressive encephalopathy resembling Leigh syndrome and die at ≈60 d of age. We previously reported that continuously breathing normobaric 11% O2 from an early age prevents neurological disease and dramatically improves survival in these mice. Here, we report three advances. First, we report updated survival curves and organ pathology in Ndufs4 KO mice exposed to hypoxia or hyperoxia. Whereas normoxia-treated KO mice die from neurodegeneration at about 60 d, hypoxia-treated mice eventually die at about 270 d, likely from cardiac disease, and hyperoxia-treated mice die within days from acute pulmonary edema. Second, we report that more conservative hypoxia regimens, such as continuous normobaric 17% O2 or intermittent hypoxia, are ineffective in preventing neuropathology. Finally, we show that breathing normobaric 11% O2 in mice with late-stage encephalopathy reverses their established neurological disease, evidenced by improved behavior, circulating disease biomarkers, and survival rates. Importantly, the pathognomonic MRI brain lesions and neurohistopathologic findings are reversed after 4 wk of hypoxia. Upon return to normoxia, Ndufs4 KO mice die within days. Future work is required to determine if hypoxia can be used to prevent and reverse neurodegeneration in other animal models, and to determine if it can be provided in a safe and practical manner to allow in-hospital human therapeutic trials.
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Kahlhöfer F, Kmita K, Wittig I, Zwicker K, Zickermann V. Accessory subunit NUYM (NDUFS4) is required for stability of the electron input module and activity of mitochondrial complex I. Biochim Biophys Acta Bioenerg 2016; 1858:175-181. [PMID: 27871794 DOI: 10.1016/j.bbabio.2016.11.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 11/15/2016] [Accepted: 11/17/2016] [Indexed: 11/18/2022]
Abstract
Mitochondrial complex I is an intricate 1MDa membrane protein complex with a central role in aerobic energy metabolism. The minimal form of complex I consists of fourteen central subunits that are conserved from bacteria to man. In addition, eukaryotic complex I comprises some 30 accessory subunits of largely unknown function. The gene for the accessory NDUFS4 subunit of human complex I is a hot spot for fatal pathogenic mutations in humans. We have deleted the gene for the orthologous NUYM subunit in the aerobic yeast Yarrowia lipolytica, an established model system to study eukaryotic complex I and complex I linked diseases. We observed assembly of complex I which lacked only subunit NUYM and retained weak interaction with assembly factor N7BML (human NDUFAF2). Absence of NUYM caused distortion of iron sulfur clusters of the electron input domain leading to decreased complex I activity and increased release of reactive oxygen species. We conclude that NUYM has an important stabilizing function for the electron input module of complex I and is essential for proper complex I function.
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Affiliation(s)
- Flora Kahlhöfer
- Structural Bioenergetics Group, Institute of Biochemistry II, Medical School, Goethe-University Frankfurt am Main, Germany
| | - Katarzyna Kmita
- Structural Bioenergetics Group, Institute of Biochemistry II, Medical School, Goethe-University Frankfurt am Main, Germany
| | - Ilka Wittig
- Functional Proteomics, Institute of Biochemistry I, Medical School, Goethe-University Frankfurt am Main, Germany; Cluster of Excellence Frankfurt "Macromolecular Complexes", Goethe-University Frankfurt am Main, Germany
| | - Klaus Zwicker
- Institute of Biochemistry I, Medical School, Goethe University Frankfurt am Main, Germany
| | - Volker Zickermann
- Structural Bioenergetics Group, Institute of Biochemistry II, Medical School, Goethe-University Frankfurt am Main, Germany; Cluster of Excellence Frankfurt "Macromolecular Complexes", Goethe-University Frankfurt am Main, Germany.
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Emelyanova L, Ashary Z, Cosic M, Negmadjanov U, Ross G, Rizvi F, Olet S, Kress D, Sra J, Tajik AJ, Holmuhamedov EL, Shi Y, Jahangir A. Selective downregulation of mitochondrial electron transport chain activity and increased oxidative stress in human atrial fibrillation. Am J Physiol Heart Circ Physiol 2016; 311:H54-63. [PMID: 27199126 PMCID: PMC4967212 DOI: 10.1152/ajpheart.00699.2015] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 04/27/2016] [Indexed: 12/19/2022]
Abstract
Mitochondria are critical for maintaining normal cardiac function, and a deficit in mitochondrial energetics can lead to the development of the substrate that promotes atrial fibrillation (AF) and its progression. However, the link between mitochondrial dysfunction and AF in humans is still not fully defined. The aim of this study was to elucidate differences in the functional activity of mitochondrial oxidative phosphorylation (OXPHOS) complexes and oxidative stress in right atrial tissue from patients without (non-AF) and with AF (AF) who were undergoing open-heart surgery and were not significantly different for age, sex, major comorbidities, and medications. The overall functional activity of the electron transport chain (ETC), NADH:O2 oxidoreductase activity, was reduced by 30% in atrial tissue from AF compared with non-AF patients. This was predominantly due to a selective reduction in complex I (0.06 ± 0.007 vs. 0.09 ± 0.006 nmol·min(-1)·citrate synthase activity(-1), P = 0.02) and II (0.11 ± 0.012 vs. 0.16 ± 0.012 nmol·min(-1)·citrate synthase activity(-1), P = 0.003) functional activity in AF patients. Conversely, complex V activity was significantly increased in AF patients (0.21 ± 0.027 vs. 0.12 ± 0.01 nmol·min(-1)·citrate synthase activity(-1), P = 0.005). In addition, AF patients exhibited a higher oxidative stress with increased production of mitochondrial superoxide (73 ± 17 vs. 11 ± 2 arbitrary units, P = 0.03) and 4-hydroxynonenal level (77.64 ± 30.2 vs. 9.83 ± 2.83 ng·mg(-1) protein, P = 0.048). Our findings suggest that AF is associated with selective downregulation of ETC activity and increased oxidative stress that can contribute to the progression of the substrate for AF.
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Affiliation(s)
- Larisa Emelyanova
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Zain Ashary
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Milanka Cosic
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Ulugbek Negmadjanov
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Gracious Ross
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Farhan Rizvi
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Susan Olet
- Patient-Centered Research, Aurora Research Institute, Aurora Health Care, Milwaukee, Wisconsin; and
| | - David Kress
- Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Jasbir Sra
- Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - A Jamil Tajik
- Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Ekhson L Holmuhamedov
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Yang Shi
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
| | - Arshad Jahangir
- Sheikh Khalifa bin Hamad Al Thani Center for Integrative Research on Cardiovascular Aging, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin; Patient-Centered Research, Aurora Research Institute, Aurora Health Care, Milwaukee, Wisconsin; and Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, Milwaukee, Wisconsin
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Logan A, Pell VR, Shaffer KJ, Evans C, Stanley NJ, Robb EL, Prime TA, Chouchani ET, Cochemé HM, Fearnley IM, Vidoni S, James AM, Porteous CM, Partridge L, Krieg T, Smith RA, Murphy MP. Assessing the Mitochondrial Membrane Potential in Cells and In Vivo using Targeted Click Chemistry and Mass Spectrometry. Cell Metab 2016; 23:379-85. [PMID: 26712463 DOI: 10.1016/j.cmet.2015.11.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 09/02/2015] [Accepted: 11/15/2015] [Indexed: 01/27/2023]
Abstract
The mitochondrial membrane potential (Δψm) is a major determinant and indicator of cell fate, but it is not possible to assess small changes in Δψm within cells or in vivo. To overcome this, we developed an approach that utilizes two mitochondria-targeted probes each containing a triphenylphosphonium (TPP) lipophilic cation that drives their accumulation in response to Δψm and the plasma membrane potential (Δψp). One probe contains an azido moiety and the other a cyclooctyne, which react together in a concentration-dependent manner by "click" chemistry to form MitoClick. As the mitochondrial accumulation of both probes depends exponentially on Δψm and Δψp, the rate of MitoClick formation is exquisitely sensitive to small changes in these potentials. MitoClick accumulation can then be quantified by liquid chromatography-tandem mass spectrometry (LC-MS/MS). This approach enables assessment of subtle changes in membrane potentials within cells and in the mouse heart in vivo.
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Jean SR, Tulumello DV, Riganti C, Liyanage SU, Schimmer AD, Kelley SO. Mitochondrial Targeting of Doxorubicin Eliminates Nuclear Effects Associated with Cardiotoxicity. ACS Chem Biol 2015; 10:2007-15. [PMID: 26038829 DOI: 10.1021/acschembio.5b00268] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The highly effective anticancer agent doxorubicin (Dox) is a frontline drug used to treat a number of cancers. While Dox has a high level of activity against cancer cells, its clinical use is often complicated by dose-limiting cardiotoxicity. While this side effect has been linked to the drug's direct activity in the mitochondria of cardiac cells, recent studies have shown that these result primarily from downstream effects of nuclear DNA damage. Our lab has developed a mitochondrially targeted derivative of Dox that enables the selective study of toxicity generated by the presence of Dox in the mitochondria of human cells. We demonstrate that mitochondria-targeted doxorubicin (mtDox) lacks any direct nuclear effects in H9c2 rat cardiomyocytes, and that these cells are able to undergo mitochondrial biogenesis. This recovery response compensates for the mitotoxic effects of Dox and prevents cell death in cardiomyocytes. Furthermore, cardiac toxicity was only observed in Dox but not mtDox treated mice. This study supports the hypothesis that mitochondrial damage is not the main source of the cardiotoxic effects of Dox.
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Affiliation(s)
| | | | - Chiara Riganti
- Department
of Oncology, University of Torino, via Santena 5/bis, 10126 Torino, Italy
| | | | | | - Shana O. Kelley
- Department
of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario M5S 3M2, Canada
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Shen Z, Ye C, McCain K, Greenberg ML. The Role of Cardiolipin in Cardiovascular Health. Biomed Res Int 2015; 2015:891707. [PMID: 26301254 DOI: 10.1155/2015/891707] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 07/08/2015] [Indexed: 12/20/2022]
Abstract
Cardiolipin (CL), the signature phospholipid of mitochondrial membranes, is crucial for both mitochondrial function and cellular processes outside of the mitochondria. The importance of CL in cardiovascular health is underscored by the life-threatening genetic disorder Barth syndrome (BTHS), which manifests clinically as cardiomyopathy, skeletal myopathy, neutropenia, and growth retardation. BTHS is caused by mutations in the gene encoding tafazzin, the transacylase that carries out the second CL remodeling step. In addition to BTHS, CL is linked to other cardiovascular diseases (CVDs), including cardiomyopathy, atherosclerosis, myocardial ischemia-reperfusion injury, heart failure, and Tangier disease. The link between CL and CVD may possibly be explained by the physiological roles of CL in pathways that are cardioprotective, including mitochondrial bioenergetics, autophagy/mitophagy, and mitogen activated protein kinase (MAPK) pathways. In this review, we focus on the role of CL in the pathogenesis of CVD as well as the molecular mechanisms that may link CL functions to cardiovascular health.
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Holzerová E, Prokisch H. Mitochondria: Much ado about nothing? How dangerous is reactive oxygen species production? Int J Biochem Cell Biol 2015; 63:16-20. [PMID: 25666559 PMCID: PMC4444525 DOI: 10.1016/j.biocel.2015.01.021] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 01/20/2015] [Accepted: 01/29/2015] [Indexed: 01/12/2023]
Abstract
For more than 50 years, reactive oxygen species have been considered as harmful agents, which can attack proteins, lipids or nucleic acids. In order to deal with reactive oxygen species, there is a sophisticated system developed in mitochondria to prevent possible damage. Indeed, increased reactive oxygen species levels contribute to pathomechanisms in several human diseases, either by its impaired defense system or increased production of reactive oxygen species. However, in the last two decades, the importance of reactive oxygen species in many cellular signaling pathways has been unraveled. Homeostatic levels were shown to be necessary for correct differentiation during embryonic expansion of stem cells. Although the mechanism is still not fully understood, we cannot only regard reactive oxygen species as a toxic by-product of mitochondrial respiration anymore. This article is part of a Directed Issue entitled: Energy Metabolism Disorders and Therapies.
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Affiliation(s)
- Eliška Holzerová
- Institute of Human Genetics, Technische Universität München, Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Holger Prokisch
- Institute of Human Genetics, Technische Universität München, Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany.
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36
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Becker L, Kling E, Schiller E, Zeh R, Schrewe A, Hölter SM, Mossbrugger I, Calzada-Wack J, Strecker V, Wittig I, Dumitru I, Wenz T, Bender A, Aichler M, Janik D, Neff F, Walch A, Quintanilla-Fend L, Floss T, Bekeredjian R, Gailus-Durner V, Fuchs H, Wurst W, Meitinger T, Prokisch H, de Angelis MH, Klopstock T. MTO1-deficient mouse model mirrors the human phenotype showing complex I defect and cardiomyopathy. PLoS One 2014; 9:e114918. [PMID: 25506927 PMCID: PMC4266617 DOI: 10.1371/journal.pone.0114918] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 11/15/2014] [Indexed: 01/23/2023] Open
Abstract
Recently, mutations in the mitochondrial translation optimization factor 1 gene (MTO1) were identified as causative in children with hypertrophic cardiomyopathy, lactic acidosis and respiratory chain defect. Here, we describe an MTO1-deficient mouse model generated by gene trap mutagenesis that mirrors the human phenotype remarkably well. As in patients, the most prominent signs and symptoms were cardiovascular and included bradycardia and cardiomyopathy. In addition, the mutant mice showed a marked worsening of arrhythmias during induction and reversal of anaesthesia. The detailed morphological and biochemical workup of murine hearts indicated that the myocardial damage was due to complex I deficiency and mitochondrial dysfunction. In contrast, neurological examination was largely normal in Mto1-deficient mice. A translational consequence of this mouse model may be to caution against anaesthesia-related cardiac arrhythmias which may be fatal in patients.
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Affiliation(s)
- Lore Becker
- Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, Munich, Germany
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Eva Kling
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Evelyn Schiller
- Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, Munich, Germany
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Ramona Zeh
- Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, Munich, Germany
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Anja Schrewe
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Sabine M. Hölter
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Ilona Mossbrugger
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Julia Calzada-Wack
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Valentina Strecker
- Functional Proteomics, Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Ilka Wittig
- Functional Proteomics, Goethe-University Frankfurt, Frankfurt am Main, Germany
- German Network for Mitochondrial Disorders (mitoNET), Munich, Germany
| | - Iulia Dumitru
- Institute for Genetics, University of Cologne, Cologne, Germany
| | - Tina Wenz
- Institute for Genetics, University of Cologne, Cologne, Germany
- German Network for Mitochondrial Disorders (mitoNET), Munich, Germany
| | - Andreas Bender
- Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, Munich, Germany
| | - Michaela Aichler
- Research Unit Analytical Pathology – Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Dirk Janik
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Frauke Neff
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Axel Walch
- Research Unit Analytical Pathology – Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Leticia Quintanilla-Fend
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Thomas Floss
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Raffi Bekeredjian
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Valérie Gailus-Durner
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Helmut Fuchs
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
| | - Wolfgang Wurst
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Technical University Munich, Chair of Developmental Genetics, c/o Helmholtz Zentrum München, Neuherberg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Max-Planck-Institute of Psychiatry, Munich, Germany
- German Center for Vertigo and Balance Disorders, Munich, Germany
| | - Thomas Meitinger
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Deutsches Forschungszentrum für Herz-Kreislauferkrankungen (DZHK), partner site Munich Heart Alliance, Munich, Germany
- Institute of Human Genetics, Technical University Munich, Munich, Germany
| | - Holger Prokisch
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Human Genetics, Technical University Munich, Munich, Germany
- German Network for Mitochondrial Disorders (mitoNET), Munich, Germany
| | - Martin Hrabě de Angelis
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- German Center for Vertigo and Balance Disorders, Munich, Germany
- Chair of Experimental Genetics, Center of Life and Food Sciences Weihenstephan, Technical University Munich, Freising-Weihenstephan, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Thomas Klopstock
- Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, Munich, Germany
- German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environment and Health, Neuherberg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- German Center for Vertigo and Balance Disorders, Munich, Germany
- German Network for Mitochondrial Disorders (mitoNET), Munich, Germany
- * E-mail:
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