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Vignaud J, Loiseau C, Hérault J, Mayer C, Côme M, Martin I, Ulmann L. Microalgae Produce Antioxidant Molecules with Potential Preventive Effects on Mitochondrial Functions and Skeletal Muscular Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12051050. [PMID: 37237915 DOI: 10.3390/antiox12051050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/25/2023] [Accepted: 05/03/2023] [Indexed: 05/28/2023] Open
Abstract
In recent years, microalgae have become a source of molecules for a healthy life. Their composition of carbohydrates, peptides, lipids, vitamins and carotenoids makes them a promising new source of antioxidant molecules. Skeletal muscle is a tissue that requires constant remodeling via protein turnover, and its regular functioning consumes energy in the form of adenosine triphosphate (ATP), which is produced by mitochondria. Under conditions of traumatic exercise or muscular diseases, a high production of reactive oxygen species (ROS) at the origin of oxidative stress (OS) will lead to inflammation and muscle atrophy, with life-long consequences. In this review, we describe the potential antioxidant effects of microalgae and their biomolecules on mitochondrial functions and skeletal muscular oxidative stress during exercises or in musculoskeletal diseases, as in sarcopenia, chronic obstructive pulmonary disease (COPD) and Duchenne muscular dystrophy (DMD), through the increase in and regulation of antioxidant pathways and protein synthesis.
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Affiliation(s)
- Jordi Vignaud
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
| | - Céline Loiseau
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
| | - Josiane Hérault
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
| | - Claire Mayer
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
| | - Martine Côme
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
| | - Isabelle Martin
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
| | - Lionel Ulmann
- BiOSSE (Biology of Organisms, Stress, Health, Environment), Institut Universitaire de Technologie, Département Génie Biologique, Le Mans Université, F-53020 Laval, France
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Henrot P, Dupin I, Schilfarth P, Esteves P, Blervaque L, Zysman M, Gouzi F, Hayot M, Pomiès P, Berger P. Main Pathogenic Mechanisms and Recent Advances in COPD Peripheral Skeletal Muscle Wasting. Int J Mol Sci 2023; 24:ijms24076454. [PMID: 37047427 PMCID: PMC10095391 DOI: 10.3390/ijms24076454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/14/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a worldwide prevalent respiratory disease mainly caused by tobacco smoke exposure. COPD is now considered as a systemic disease with several comorbidities. Among them, skeletal muscle dysfunction affects around 20% of COPD patients and is associated with higher morbidity and mortality. Although the histological alterations are well characterized, including myofiber atrophy, a decreased proportion of slow-twitch myofibers, and a decreased capillarization and oxidative phosphorylation capacity, the molecular basis for muscle atrophy is complex and remains partly unknown. Major difficulties lie in patient heterogeneity, accessing patients' samples, and complex multifactorial process including extrinsic mechanisms, such as tobacco smoke or disuse, and intrinsic mechanisms, such as oxidative stress, hypoxia, or systemic inflammation. Muscle wasting is also a highly dynamic process whose investigation is hampered by the differential protein regulation according to the stage of atrophy. In this review, we report and discuss recent data regarding the molecular alterations in COPD leading to impaired muscle mass, including inflammation, hypoxia and hypercapnia, mitochondrial dysfunction, diverse metabolic changes such as oxidative and nitrosative stress and genetic and epigenetic modifications, all leading to an impaired anabolic/catabolic balance in the myocyte. We recapitulate data concerning skeletal muscle dysfunction obtained in the different rodent models of COPD. Finally, we propose several pathways that should be investigated in COPD skeletal muscle dysfunction in the future.
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Affiliation(s)
- Pauline Henrot
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
| | - Isabelle Dupin
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
| | - Pierre Schilfarth
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
| | - Pauline Esteves
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
| | - Léo Blervaque
- PhyMedExp, INSERM-CNRS-Montpellier University, F-34090 Montpellier, France
| | - Maéva Zysman
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
| | - Fares Gouzi
- PhyMedExp, INSERM-CNRS-Montpellier University, CHRU Montpellier, F-34090 Montpellier, France
| | - Maurice Hayot
- PhyMedExp, INSERM-CNRS-Montpellier University, CHRU Montpellier, F-34090 Montpellier, France
| | - Pascal Pomiès
- PhyMedExp, INSERM-CNRS-Montpellier University, F-34090 Montpellier, France
| | - Patrick Berger
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
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3
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Wang Y, Li P, Cao Y, Liu C, Wang J, Wu W. Skeletal Muscle Mitochondrial Dysfunction in Chronic Obstructive Pulmonary Disease: Underlying Mechanisms and Physical Therapy Perspectives. Aging Dis 2023; 14:33-45. [PMID: 36818563 PMCID: PMC9937710 DOI: 10.14336/ad.2022.0603] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 06/03/2022] [Indexed: 11/18/2022] Open
Abstract
Skeletal muscle dysfunction (SMD) is a prevalent extrapulmonary complication and a significant independent prognostic factor in patients with chronic obstructive pulmonary disease (COPD). Mitochondrial dysfunction is one of the core factors that damage structure and function in COPD skeletal muscle and is closely related to smoke exposure, hypoxia, and insufficient physical activity. The currently known phenotypes of mitochondrial dysfunction are reduced mitochondrial content and biogenesis, impaired activity of mitochondrial respiratory chain complexes, and increased mitochondrial reactive oxygen species production. Significant progress has been made in research on physical therapy (PT), which has broad prospects for treating the abovementioned potential mitochondrial-function changes in COPD skeletal muscle. In terms of specific types of PT, exercise therapy can directly act on mitochondria and improve COPD SMD by increasing mitochondrial density, regulating mitochondrial biogenesis, upregulating mitochondrial respiratory function, and reducing oxidative stress. However, improvements in mitochondrial-dysfunction phenotype in COPD skeletal muscle due to different exercise strategies are not entirely consistent. Therefore, based on the elucidation of this phenotype, in this study, we analyzed the effect of exercise on mitochondrial dysfunction in COPD skeletal muscle and the regulatory mechanism thereof. We also provided a theoretical basis for exercise programs to rehabilitate this condition.
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Affiliation(s)
- Yingqi Wang
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, China.
| | - Peijun Li
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, China.
| | - Yuanyuan Cao
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, China.
| | - Chanjing Liu
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, China.
| | - Jie Wang
- School of Physical Education and Sport Training, Shanghai University of Sport, Shanghai, China.,Correspondence should be addressed to: Dr. Weibing Wu () and Dr. Jie Wang (), Shanghai University of Sport, Shanghai, China
| | - Weibing Wu
- Department of Sports Rehabilitation, Shanghai University of Sport, Shanghai, China.,Correspondence should be addressed to: Dr. Weibing Wu () and Dr. Jie Wang (), Shanghai University of Sport, Shanghai, China
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Zuo J, Zhang Z, Luo M, Zhou L, Nice EC, Zhang W, Wang C, Huang C. Redox signaling at the crossroads of human health and disease. MedComm (Beijing) 2022; 3:e127. [PMID: 35386842 PMCID: PMC8971743 DOI: 10.1002/mco2.127] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 02/06/2023] Open
Abstract
Redox biology is at the core of life sciences, accompanied by the close correlation of redox processes with biological activities. Redox homeostasis is a prerequisite for human health, in which the physiological levels of nonradical reactive oxygen species (ROS) function as the primary second messengers to modulate physiological redox signaling by orchestrating multiple redox sensors. However, excessive ROS accumulation, termed oxidative stress (OS), leads to biomolecule damage and subsequent occurrence of various diseases such as type 2 diabetes, atherosclerosis, and cancer. Herein, starting with the evolution of redox biology, we reveal the roles of ROS as multifaceted physiological modulators to mediate redox signaling and sustain redox homeostasis. In addition, we also emphasize the detailed OS mechanisms involved in the initiation and development of several important diseases. ROS as a double‐edged sword in disease progression suggest two different therapeutic strategies to treat redox‐relevant diseases, in which targeting ROS sources and redox‐related effectors to manipulate redox homeostasis will largely promote precision medicine. Therefore, a comprehensive understanding of the redox signaling networks under physiological and pathological conditions will facilitate the development of redox medicine and benefit patients with redox‐relevant diseases.
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Affiliation(s)
- Jing Zuo
- State Key Laboratory of Biotherapy and Cancer Center West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy Chengdu P. R. China
| | - Zhe Zhang
- State Key Laboratory of Biotherapy and Cancer Center West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy Chengdu P. R. China
| | - Maochao Luo
- State Key Laboratory of Biotherapy and Cancer Center West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy Chengdu P. R. China
| | - Li Zhou
- State Key Laboratory of Biotherapy and Cancer Center West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy Chengdu P. R. China
| | - Edouard C. Nice
- Department of Biochemistry and Molecular Biology Monash University Clayton Victoria Australia
| | - Wei Zhang
- West China Biomedical Big Data Center West China Hospital Sichuan University Chengdu P. R. China
- Mental Health Center and Psychiatric Laboratory The State Key Laboratory of Biotherapy West China Hospital of Sichuan University Chengdu P. R. China
| | - Chuang Wang
- Department of Pharmacology Provincial Key Laboratory of Pathophysiology, Ningbo University School of Medicine Ningbo Zhejiang P. R. China
| | - Canhua Huang
- State Key Laboratory of Biotherapy and Cancer Center West China Hospital, and West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, and Collaborative Innovation Center for Biotherapy Chengdu P. R. China
- Department of Pharmacology Provincial Key Laboratory of Pathophysiology, Ningbo University School of Medicine Ningbo Zhejiang P. R. China
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5
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Mitochondrial Dysfunction in Chronic Respiratory Diseases: Implications for the Pathogenesis and Potential Therapeutics. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5188306. [PMID: 34354793 PMCID: PMC8331273 DOI: 10.1155/2021/5188306] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/30/2021] [Accepted: 07/16/2021] [Indexed: 02/07/2023]
Abstract
Mitochondria are indispensable for energy metabolism and cell signaling. Mitochondrial homeostasis is sustained with stabilization of mitochondrial membrane potential, balance of mitochondrial calcium, integrity of mitochondrial DNA, and timely clearance of damaged mitochondria via mitophagy. Mitochondrial dysfunction is featured by increased generation of mitochondrial reactive oxygen species, reduced mitochondrial membrane potential, mitochondrial calcium imbalance, mitochondrial DNA damage, and abnormal mitophagy. Accumulating evidence indicates that mitochondrial dysregulation causes oxidative stress, inflammasome activation, apoptosis, senescence, and metabolic reprogramming. All these cellular processes participate in the pathogenesis and progression of chronic respiratory diseases, including chronic obstructive pulmonary disease, pulmonary fibrosis, and asthma. In this review, we provide a comprehensive and updated overview of the impact of mitochondrial dysfunction on cellular processes involved in the development of these respiratory diseases. This not only implicates mechanisms of mitochondrial dysfunction for the pathogenesis of chronic lung diseases but also provides potential therapeutic approaches for these diseases by targeting dysfunctional mitochondria.
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6
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Decker ST, Kwon OS, Zhao J, Hoidal JR, Heuckstadt T, Richardson RS, Sanders KA, Layec G. Skeletal muscle mitochondrial adaptations induced by long-term cigarette smoke exposure. Am J Physiol Endocrinol Metab 2021; 321:E80-E89. [PMID: 34121449 PMCID: PMC8321829 DOI: 10.1152/ajpendo.00544.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/17/2021] [Accepted: 03/18/2021] [Indexed: 12/18/2022]
Abstract
Because patients with chronic obstructive pulmonary disease (COPD) are often physically inactive, it is still unclear whether the lower respiratory capacity in the locomotor muscles of these patients is due to cigarette smoking per se or is secondary to physical deconditioning. Accordingly, the purpose of this study was to examine mitochondrial alterations in the quadriceps muscle of 10 mice exposed to 8 mo of cigarette smoke, a sedentary mouse model of emphysema, and 9 control mice, using immunoblotting, spectrophotometry, and high-resolution respirometry in permeabilized muscle fibers. Mice exposed to smoke displayed a twofold increase in the oxidative stress marker, 4-HNE, (P < 0.05) compared with control mice. This was accompanied by significant decrease in protein expression of UCP3 (65%), ANT (58%), and mitochondrial complexes II-V (∼60%-75%). In contrast, maximal ADP-stimulated respiration with complex I and II substrates (CON: 23.6 ± 6.6 and SMO: 19.2 ± 8.2 ρM·mg-1·s-1) or octanoylcarnitine (CON: 21.8 ± 9.0 and SMO: 16.5 ± 6.6 ρM·mg-1·s-1) measured in permeabilized muscle fibers, as well as citrate synthase activity, were not significantly different between groups. Collectively, our findings revealed that sedentary mice exposed to cigarette smoke for 8 mo, which is typically associated with pulmonary inflammation and emphysema, exhibited a preserved mitochondrial respiratory capacity for various substrates, including fatty acid, in the skeletal muscle. However, the mitochondrial adaptations induced by cigarette smoke favored the development of chronic oxidative stress, which can indirectly contribute to augment the susceptibility to muscle fatigue and exercise intolerance.NEW & NOTEWORTHY It is unclear whether the exercise intolerance and skeletal muscle mitochondrial dysfunction observed in patients with COPD is due to cigarette smoke exposure, per se, or if they are secondary consequences to inactivity. Herein, while long-term exposure to cigarette smoke induces oxidative stress and an altered skeletal muscle phenotype, cigarette smoke does not directly contribute to mitochondrial dysfunction. With this evidence, we demonstrate the critical role of physical inactivity in cigarette smoke-related skeletal muscle dysfunction.
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Affiliation(s)
- Stephen T Decker
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, Massachusetts
| | - Oh-Sung Kwon
- Department of Kinesiology, University of Connecticut, Storrs, Connecticut
- UConn Center on Aging and Department of Orthopaedic Surgery, University of Connecticut, School of Medicine, Farmington, Connecticut
- Geriatric Research, Education, and Clinical Center, George E. Wahlen VA Medical Center, Salt Lake City, Utah
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Jia Zhao
- Geriatric Research, Education, and Clinical Center, George E. Wahlen VA Medical Center, Salt Lake City, Utah
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - John R Hoidal
- Department of Internal Medicine, Pulmonary Division, University of Utah, Salt Lake City, Utah
- George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah
- Division of Respiratory, Critical Care, and Occupational Pulmonary Medicine, University of Utah, Salt Lake City, Utah
| | - Thomas Heuckstadt
- Department of Internal Medicine, Pulmonary Division, University of Utah, Salt Lake City, Utah
- George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah
- Division of Respiratory, Critical Care, and Occupational Pulmonary Medicine, University of Utah, Salt Lake City, Utah
| | - Russell S Richardson
- Geriatric Research, Education, and Clinical Center, George E. Wahlen VA Medical Center, Salt Lake City, Utah
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Karl A Sanders
- Department of Internal Medicine, Pulmonary Division, University of Utah, Salt Lake City, Utah
- George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah
- Division of Respiratory, Critical Care, and Occupational Pulmonary Medicine, University of Utah, Salt Lake City, Utah
| | - Gwenael Layec
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, Massachusetts
- Institute of Applied Life Science, University of Massachusetts Amherst, Amherst, Massachusetts
- Geriatric Research, Education, and Clinical Center, George E. Wahlen VA Medical Center, Salt Lake City, Utah
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
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7
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Beijers RJ, Gosker HR, Sanders KJ, de Theije C, Kelders M, Clarke G, Cryan JF, van den Borst B, Schols AM. Resveratrol and metabolic health in COPD: A proof-of-concept randomized controlled trial. Clin Nutr 2020; 39:2989-2997. [PMID: 31996311 DOI: 10.1016/j.clnu.2020.01.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 12/18/2019] [Accepted: 01/07/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND Patients with COPD are often characterized by disturbed metabolic health which is reflected in altered body composition. Current studies in healthy subjects suggest that resveratrol improves metabolic health by enhancing muscle mitochondrial function and adipose tissue morphology. The primary objective was to investigate the effect of four weeks resveratrol supplementation on muscle mitochondrial function in patients with COPD. Secondary objectives were to investigate the effect of resveratrol on adipose tissue inflammatory and metabolic gene expression, systemic inflammation and body composition in patients with COPD. METHODS In a double-blind randomized placebo-controlled proof-of-concept study, 21 COPD patients (FEV1: 53 ± 15% predicted; age: 67 ± 9 years and BMI: 24.5 ± 3.3 kg/m2) received resveratrol (150 mg/day) or placebo for four weeks. Before and after intervention, blood samples, quadriceps muscle and subcutaneous abdominal fat biopsies were obtained for metabolic and inflammatory profiling. Body composition was assessed by dual energy X-ray absorptiometry. RESULTS Muscle mitochondrial biogenesis regulators AMPK, SIRT1 and PGC-1α as well as mitochondrial respiration, Oxphos complexes, oxidative enzyme activities and kynurenine aminotransferases were not improved by resveratrol. Plasma high-sensitive C-reactive protein and kynurenine did not change after resveratrol supplementation. Adipose tissue inflammatory markers were unaffected by resveratrol, while markers of glycolysis and lipolysis were significantly increased compared to placebo supplementation. Body weight decreased after resveratrol supplementation (resveratrol -0.95 ± 1.01 kg vs placebo -0.16 ± 0.66 kg, p = 0.049) due to a reduction in lean mass (resveratrol -1.79 ± 1.67 kg vs 0.37 ± 0.86 kg, p = 0.026). CONCLUSION We do not confirm previously reported positive effects of resveratrol on skeletal muscle mitochondrial function in patients with COPD, but show an unexpected decline in lean mass. CLINICAL TRIAL REGISTRY Clinicaltrials.gov NCT02245932.
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Affiliation(s)
- Rosanne Jhcg Beijers
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands.
| | - Harry R Gosker
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Karin Jc Sanders
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Chiel de Theije
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Marco Kelders
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Gerard Clarke
- APC Microbiome Ireland & Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland
| | - John F Cryan
- APC Microbiome Ireland & Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - Bram van den Borst
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Annemie Mwj Schols
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, the Netherlands
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Gouzi F, Blaquière M, Catteau M, Bughin F, Maury J, Passerieux E, Ayoub B, Mercier J, Hayot M, Pomiès P. Oxidative stress regulates autophagy in cultured muscle cells of patients with chronic obstructive pulmonary disease. J Cell Physiol 2018; 233:9629-9639. [PMID: 29943813 DOI: 10.1002/jcp.26868] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 05/23/2018] [Indexed: 12/21/2022]
Abstract
The proteolytic autophagy pathway is enhanced in the lower limb muscles of patients with chronic obstructive pulmonary disease (COPD). Reactive oxygen species (ROS) have been shown to regulate autophagy in the skeletal muscles, but the role of oxidative stress in the muscle autophagy of patients with COPD is unknown. We used cultured myoblasts and myotubes from the quadriceps of eight healthy subjects and twelve patients with COPD (FEV1% predicted: 102.0% and 32.0%, respectively; p < 0.0001). We compared the autophagosome formation, the expression of autophagy markers, and the autophagic flux in healthy subjects and the patients with COPD, and we evaluated the effects of the 3-methyladenine (3-MA) autophagy inhibitor on the atrophy of COPD myotubes. Autophagy was also assessed in COPD myotubes treated with an antioxidant molecule, ascorbic acid. Autophagosome formation was increased in COPD myoblasts and myotubes (p = 0.011; p < 0.001), and the LC3 2/LC3 1 ratio (p = 0.002), SQSTM1 mRNA and protein expression (p = 0.023; p = 0.007), BNIP3 expression (p = 0.031), and autophagic flux (p = 0.002) were higher in COPD myoblasts. Inhibition of autophagy with 3-MA increased the COPD myotube diameter (p < 0.001) to a level similar to the diameter of healthy subject myotubes. Treatment of COPD myotubes with ascorbic acid decreased ROS concentration (p < 0.001), ROS-induced protein carbonylation (p = 0.019), the LC3 2/LC3 1 ratio (p = 0.037), the expression of SQSTM1 (p < 0.001) and BNIP3 (p < 0.001), and increased the COPD myotube diameter (p < 0.001). Thus, autophagy signaling is enhanced in cultured COPD muscle cells. Furthermore, the oxidative stress level contributes to the regulation of autophagy, which is involved in the atrophy of COPD myotubes in vitro.
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Affiliation(s)
- Fares Gouzi
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Department of Clinical Physiology, CHRU of Montpellier, Montpellier, France
| | - Marine Blaquière
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Department of Clinical Physiology, CHRU of Montpellier, Montpellier, France
| | - Matthias Catteau
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
| | - François Bughin
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Department of Clinical Physiology, CHRU of Montpellier, Montpellier, France
| | - Jonathan Maury
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Clinique du Souffle "La Solane," Fontalvie/5-Santé Group, Osséja, France
| | - Emilie Passerieux
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
| | - Bronia Ayoub
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Department of Clinical Physiology, CHRU of Montpellier, Montpellier, France
| | - Jacques Mercier
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Department of Clinical Physiology, CHRU of Montpellier, Montpellier, France
| | - Maurice Hayot
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France.,Department of Clinical Physiology, CHRU of Montpellier, Montpellier, France
| | - Pascal Pomiès
- PhyMedExp, University of Montpellier, INSERM, CNRS, Montpellier, France
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9
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Gifford JR, Trinity JD, Kwon OS, Layec G, Garten RS, Park SY, Nelson AD, Richardson RS. Altered skeletal muscle mitochondrial phenotype in COPD: disease vs. disuse. J Appl Physiol (1985) 2018; 124:1045-1053. [PMID: 29357496 PMCID: PMC5972462 DOI: 10.1152/japplphysiol.00788.2017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/20/2017] [Accepted: 12/20/2017] [Indexed: 11/22/2022] Open
Abstract
Patients with chronic obstructive pulmonary disease (COPD) exhibit an altered skeletal muscle mitochondrial phenotype, which often includes reduced mitochondrial density, altered respiratory function, and elevated oxidative stress. As this phenotype may be explained by the sedentary lifestyle that commonly accompanies this disease, the aim of this study was to determine whether such alterations are still evident when patients with COPD are compared to control subjects matched for objectively measured physical activity (PA; accelerometry). Indexes of mitochondrial density [citrate synthase (CS) activity], respiratory function (respirometry in permeabilized fibers), and muscle oxidative stress [4-hydroxynonenal (4-HNE) content] were assessed in muscle fibers biopsied from the vastus lateralis of nine patients with COPD and nine PA-matched control subjects (CON). Despite performing similar levels of PA (CON: 18 ± 3, COPD: 20 ± 7 daily minutes moderate-to-vigorous PA; CON: 4,596 ± 683, COPD: 4,219 ± 763 steps per day, P > 0.70), patients with COPD still exhibited several alterations in their mitochondrial phenotype, including attenuated skeletal muscle mitochondrial density (CS activity; CON 70.6 ± 3.8, COPD 52.7 ± 6.5 U/mg, P < 0.05), altered mitochondrial respiration [e.g., ratio of complex I-driven state 3 to complex II-driven state 3 (CI/CII); CON: 1.20 ± 0.11, COPD: 0.90 ± 0.05, P < 0.05), and oxidative stress (4-HNE; CON: 1.35 ± 0.19, COPD: 2.26 ± 0.25 relative to β-actin, P < 0.05). Furthermore, CS activity ( r = 0.55), CI/CII ( r = 0.60), and 4-HNE ( r = 0.49) were all correlated with pulmonary function, assessed as forced expiratory volume in 1 s ( P < 0.05), but not PA ( P > 0.05). In conclusion, the altered mitochondrial phenotype in COPD is present even in the absence of differing levels of PA and appears to be related to the disease itself. NEW & NOTEWORTHY Chronic obstructive pulmonary disease (COPD) is associated with debilitating alterations in the function of skeletal muscle mitochondria. By comparing the mitochondrial phenotype of patients with COPD to that of healthy control subjects who perform the same amount of physical activity each day, this study provides evidence that many aspects of the dysfunctional mitochondrial phenotype observed in COPD are not merely due to reduced physical activity but are likely related to the disease itself.
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Affiliation(s)
- Jayson R Gifford
- Department of Exercise Sciences, Brigham Young University , Provo, Utah
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Medical Center , Salt Lake City, Utah
- Department of Internal Medicine, University of Utah , Salt Lake City, Utah
| | - Joel D Trinity
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Medical Center , Salt Lake City, Utah
- Department of Internal Medicine, University of Utah , Salt Lake City, Utah
| | - Oh-Sung Kwon
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Medical Center , Salt Lake City, Utah
- Department of Internal Medicine, University of Utah , Salt Lake City, Utah
| | - Gwenael Layec
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Medical Center , Salt Lake City, Utah
- Department of Internal Medicine, University of Utah , Salt Lake City, Utah
| | - Ryan S Garten
- Department of Exercise Science, Health, and Movement Science, Virginia Commonwealth University , Richmond, Virginia
| | - Song-Young Park
- School of Health and Kinesiology, University of Nebraska , Omaha, Nebraska
| | - Ashley D Nelson
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Medical Center , Salt Lake City, Utah
- Department of Internal Medicine, University of Utah , Salt Lake City, Utah
| | - Russell S Richardson
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Medical Center , Salt Lake City, Utah
- Department of Internal Medicine, University of Utah , Salt Lake City, Utah
- Department of Nutrition and Integrative Physiology, University of Utah , Salt Lake City, Utah
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Beijers RJHCG, Gosker HR, Schols AMWJ. Resveratrol for patients with chronic obstructive pulmonary disease: hype or hope? Curr Opin Clin Nutr Metab Care 2018; 21:138-144. [PMID: 29200030 PMCID: PMC5811233 DOI: 10.1097/mco.0000000000000444] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW Chronic obstructive pulmonary disease (COPD) is a progressive lung disease with a high prevalence of extrapulmonary manifestations and, frequently, cardiovascular comorbidity. Resveratrol is a food-derived compound with anti-inflammatory, antioxidant, metabolic and cardioprotective potential. Therefore, resveratrol might improve the pulmonary as well as extrapulmonary pathology in COPD. In this review, we will evaluate knowledge on the effects of resveratrol on lung injury, muscle metabolism and cardiovascular risk profile and discuss if resveratrol is a hype or hope for patients with COPD. RECENT FINDINGS Experimental models of COPD consistently show decreased inflammation and oxidative stress in the lungs after resveratrol treatment. These beneficial anti-inflammatory and antioxidant properties of resveratrol can indirectly also improve both skeletal and respiratory muscle impairment in COPD. Recent clinical studies in non-COPD populations show improved mitochondrial oxidative metabolism after resveratrol treatment, which could be beneficial for both lung and muscle impairment in COPD. Moreover, preclinical studies suggest cardioprotective effects of resveratrol but results of clinical studies are inconclusive. SUMMARY Resveratrol might be an interesting therapeutic candidate to counteract lung and muscle impairments characteristic to COPD. However, there is no convincing evidence that resveratrol will significantly decrease the cardiovascular risk in patients with COPD.
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Affiliation(s)
- Rosanne J H C G Beijers
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
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11
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Zhang JQ, Long XY, Xie Y, Zhao ZH, Fang LZ, Liu L, Fu WP, Shu JK, Wu JH, Dai LM. Relationship between PPARα mRNA expression and mitochondrial respiratory function and ultrastructure of the skeletal muscle of patients with COPD. Bioengineered 2017; 8:723-731. [PMID: 28708015 DOI: 10.1080/21655979.2017.1346757] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Peripheral muscle dysfunction is an important complication in patients with chronic obstructive pulmonary disease (COPD). The objective of this study was to explore the relationship between the levels of peroxisome proliferator-activated receptor α (PPARα) mRNA expression and the respiratory function and ultrastructure of mitochondria in the vastus lateralis of patients with COPD. Vastus lateralis biopsies were performed on 14 patients with COPD and 6 control subjects with normal lung function. PPARα mRNA levels in the muscle tissue were detected by real-time PCR. A Clark oxygen electrode was used to assess mitochondrial respiratory function. Mitochondrial number, fractional area in skeletal muscle cross-sections, and Z-line width were observed via transmission electron microscopy. The PPARα mRNA expression was significantly lower in COPD patients with low body mass index (BMIL) than in both COPD patients with normal body mass index (BMIN) and controls. Mitochondrial respiratory function (assessed by respiratory control ratio) was impaired in COPD patients, particularly in BMIL. Compared with that in the control group, mitochondrial number and fractional area were lower in the BMIL group, but were maintained in the BMIN group. Further, the Z-line became narrow in the BMIL group. PPARα mRNA expression was positively related to mitochondrial respiratory function and volume density. In COPD patients with BMIN, mitochondria volume density was maintained, while respiratory function decreased, whereas both volume density and respiratory function decreased in COPD patients with BMIL. PPARα mRNA expression levels are associated with decreased mitochondrial respiratory function and volume density, which may contribute to muscle dysfunction in COPD patients.
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Affiliation(s)
- Jian-Qing Zhang
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Xiang-Yu Long
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Yu Xie
- b Department of hematology , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Zhi-Huan Zhao
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Li-Zhou Fang
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Ling Liu
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Wei-Ping Fu
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Jing-Kui Shu
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Jiang-Hai Wu
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
| | - Lu-Ming Dai
- a Department of Respiratory Critical Care Medicine , the First Affiliated Hospital of Kunming Medical University , Kunming , China
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12
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Białas AJ, Sitarek P, Miłkowska-Dymanowska J, Piotrowski WJ, Górski P. The Role of Mitochondria and Oxidative/Antioxidative Imbalance in Pathobiology of Chronic Obstructive Pulmonary Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:7808576. [PMID: 28105251 PMCID: PMC5220474 DOI: 10.1155/2016/7808576] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 10/23/2016] [Indexed: 12/12/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a common preventable and treatable disease, characterized by persistent airflow limitation that is usually progressive and associated with an enhanced chronic inflammatory response in the airways and the lung to noxious particles or gases. The major risk factor of COPD, which has been proven in many studies, is the exposure to cigarette smoke. However, it is 15-20% of all smokers who develop COPD. This is why we should recognize the pathobiology of COPD as involving a complex interaction between several factors, including genetic vulnerability. Oxidant-antioxidant imbalance is recognized as one of the significant factors in COPD pathogenesis. Numerous exogenous and endogenous sources of ROS are present in pathobiology of COPD. One of endogenous sources of ROS is mitochondria. Although leakage of electrons from electron transport chain and forming of ROS are the effect of physiological functioning of mitochondria, there are various intra- and extracellular factors which may increase this amount and significantly contribute to oxidative-antioxidative imbalance. With the coexistence with impaired antioxidant defence, all these issues lead to oxidative and carbonyl stress. Both of these states play a significant role in pathobiology of COPD and may account for development of major comorbidities of this disease.
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Affiliation(s)
- Adam Jerzy Białas
- Department of Pneumology and Allergy, 1st Chair of Internal Medicine, Medical University of Lodz, Łódź, Poland
- Healthy Aging Research Centre (HARC), Medical University of Lodz, Łódź, Poland
| | - Przemysław Sitarek
- Department of Biology and Pharmaceutical Botany, Medical University of Łódź, Łódź, Poland
| | - Joanna Miłkowska-Dymanowska
- Department of Pneumology and Allergy, 1st Chair of Internal Medicine, Medical University of Lodz, Łódź, Poland
- Healthy Aging Research Centre (HARC), Medical University of Lodz, Łódź, Poland
| | - Wojciech Jerzy Piotrowski
- Department of Pneumology and Allergy, 1st Chair of Internal Medicine, Medical University of Lodz, Łódź, Poland
- Healthy Aging Research Centre (HARC), Medical University of Lodz, Łódź, Poland
| | - Paweł Górski
- Department of Pneumology and Allergy, 1st Chair of Internal Medicine, Medical University of Lodz, Łódź, Poland
- Healthy Aging Research Centre (HARC), Medical University of Lodz, Łódź, Poland
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Marín de Mas I, Fanchon E, Papp B, Kalko S, Roca J, Cascante M. Molecular mechanisms underlying COPD-muscle dysfunction unveiled through a systems medicine approach. Bioinformatics 2016; 33:95-103. [PMID: 27794560 DOI: 10.1093/bioinformatics/btw566] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 08/26/2016] [Accepted: 08/29/2016] [Indexed: 01/04/2023] Open
Abstract
MOTIVATION Skeletal muscle dysfunction is a systemic effect in one-third of patients with chronic obstructive pulmonary disease (COPD), characterized by high reactive-oxygen-species (ROS) production and abnormal endurance training-induced adaptive changes. However, the role of ROS in COPD remains unclear, not least because of the lack of appropriate tools to study multifactorial diseases. RESULTS We describe a discrete model-driven method combining mechanistic and probabilistic approaches to decipher the role of ROS on the activity state of skeletal muscle regulatory network, assessed before and after an 8-week endurance training program in COPD patients and healthy subjects. In COPD, our computational analysis indicates abnormal training-induced regulatory responses leading to defective tissue remodeling and abnormal energy metabolism. Moreover, we identified tnf, insr, inha and myc as key regulators of abnormal training-induced adaptations in COPD. The tnf-insr pair was identified as a promising target for therapeutic interventions. Our work sheds new light on skeletal muscle dysfunction in COPD, opening new avenues for cost-effective therapies. It overcomes limitations of previous computational approaches showing high potential for the study of other multi-factorial diseases such as diabetes or cancer. CONTACT jroca@clinic.ub.es or martacascante@ub.eduSupplementary information: Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Igor Marín de Mas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Institute of Biomedicine of University of Barcelona (IBUB) and IDIBAPS, Diagonal 645, Barcelona 08028, Spain.,Institut d' Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona 08028, Spain.,Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Center of the Hungarian Academy of Sciences, Temesvári krt. 62, Szeged H-6726, Hungary
| | - Eric Fanchon
- Université Grenoble Alpes-CNRS, TIMC-IMAG UMR 5525, Faculté de Médecine, Grenoble 38041, France
| | - Balázs Papp
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Center of the Hungarian Academy of Sciences, Temesvári krt. 62, Szeged H-6726, Hungary
| | - Susana Kalko
- Bioinformatics Core Facility, IDIBAPS-CEK, Hospital Clínic, University de Barcelona, Barcelona 08036, Spain
| | - Josep Roca
- Institut d' Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona 08028, Spain.,Department of Pulmonary Medicine, Hospital Clínic, IDIBAPS, CIBERES, Universitat de Barcelona, Barcelona 08036, Spain
| | - Marta Cascante
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Institute of Biomedicine of University of Barcelona (IBUB) and IDIBAPS, Diagonal 645, Barcelona 08028, Spain.,Institut d' Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona 08028, Spain
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Barreiro E. The role of MicroRNAs in COPD muscle dysfunction and mass loss: implications on the clinic. Expert Rev Respir Med 2016; 10:1011-22. [PMID: 27348064 DOI: 10.1080/17476348.2016.1206819] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Chronic obstructive pulmonary disease (COPD) is a common preventable and treatable disease and a leading cause of morbidity and mortality worldwide. In COPD, comorbidities, acute exacerbations, and systemic manifestations negatively influence disease severity, prognosis, and progression regardless of the respiratory condition. AREAS COVERED Several factors and biological mechanisms are involved in the pathophysiology of COPD muscle dysfunction. The non-coding microRNAs were shown to be differentially expressed in the respiratory and limb muscles of patients with COPD. Moreover, a differential expression profile of muscle-specific microRNAs has also been demonstrated in the lower limb muscles of COPD patients with and without muscle mass loss and weakness. All these features are reviewed herein. The most relevant articles on the topic in question were selected from PubMed to write this review. Expert commentary: MicroRNAs are excellent targets for the design of specific therapeutic interventions in patients with muscle weakness. Selective enhancers of microRNAs that promote myogenesis (proliferation and differentiation of satellite cells) should be designed to alleviate the negative impact of skeletal muscle dysfunction and mass loss in COPD regardless of the degree of the airway obstruction.
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Affiliation(s)
- Esther Barreiro
- a Respiratory Medicine Department, Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group , Institute of Medical Research of Hospital del Mar (IMIM)-Hospital del Mar, Parc de Salut Mar, Barcelona Biomedical Research Park (PRBB) , Barcelona , Spain.,b Department of Health Sciences (CEXS) , Universitat Pompeu Fabra , Barcelona , Spain.,c Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES) , Instituto de Salud Carlos III (ISCIII) , Barcelona , Spain
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15
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Role of Protein Carbonylation in Skeletal Muscle Mass Loss Associated with Chronic Conditions. Proteomes 2016; 4:proteomes4020018. [PMID: 28248228 PMCID: PMC5217349 DOI: 10.3390/proteomes4020018] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/23/2016] [Accepted: 05/04/2016] [Indexed: 01/06/2023] Open
Abstract
Muscle dysfunction, characterized by a reductive remodeling of muscle fibers, is a common systemic manifestation in highly prevalent conditions such as chronic heart failure (CHF), chronic obstructive pulmonary disease (COPD), cancer cachexia, and critically ill patients. Skeletal muscle dysfunction and impaired muscle mass may predict morbidity and mortality in patients with chronic diseases, regardless of the underlying condition. High levels of oxidants may alter function and structure of key cellular molecules such as proteins, DNA, and lipids, leading to cellular injury and death. Protein oxidation including protein carbonylation was demonstrated to modify enzyme activity and DNA binding of transcription factors, while also rendering proteins more prone to proteolytic degradation. Given the relevance of protein oxidation in the pathophysiology of many chronic conditions and their comorbidities, the current review focuses on the analysis of different studies in which the biological and clinical significance of the modifications induced by reactive carbonyls on proteins have been explored so far in skeletal muscles of patients and animal models of chronic conditions such as COPD, disuse muscle atrophy, cancer cachexia, sepsis, and physiological aging. Future research will elucidate the specific impact and sites of reactive carbonyls on muscle protein content and function in human conditions.
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Taivassalo T, Hussain SN. Contribution of the Mitochondria to Locomotor Muscle Dysfunction in Patients With COPD. Chest 2016; 149:1302-12. [DOI: 10.1016/j.chest.2015.11.021] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 11/09/2015] [Accepted: 11/24/2015] [Indexed: 11/29/2022] Open
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Barreiro E, Puig-Vilanova E, Marin-Corral J, Chacón-Cabrera A, Salazar-Degracia A, Mateu X, Puente-Maestu L, García-Arumí E, Andreu AL, Molina L. Therapeutic Approaches in Mitochondrial Dysfunction, Proteolysis, and Structural Alterations of Diaphragm and Gastrocnemius in Rats With Chronic Heart Failure. J Cell Physiol 2015; 231:1495-513. [DOI: 10.1002/jcp.25241] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 11/03/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Esther Barreiro
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Ester Puig-Vilanova
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
| | - Judith Marin-Corral
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
| | - Alba Chacón-Cabrera
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Anna Salazar-Degracia
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Xavier Mateu
- Servicio de Neumología, Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Madrid Spain
| | - Luis Puente-Maestu
- Servicio de Neumología, Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Madrid Spain
| | - Elena García-Arumí
- Unitat de Patologia Neuromuscular i Mitocondrial, Hospital Universitari Vall d'Hebron Institut de Recerca (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER); ISCIII; Barcelona Spain
| | - Antoni L. Andreu
- Unitat de Patologia Neuromuscular i Mitocondrial, Hospital Universitari Vall d'Hebron Institut de Recerca (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER); ISCIII; Barcelona Spain
| | - Luis Molina
- Department of Cardiology, Hospital del Mar, Heart Diseases Biomedical Research Group, IMIM, and Department of Medicine; Universitat Autònoma de Barcelona; Barcelona Spain
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Rossman MJ, Trinity JD, Garten RS, Ives SJ, Conklin JD, Barrett-O'Keefe Z, Witman MAH, Bledsoe AD, Morgan DE, Runnels S, Reese VR, Zhao J, Amann M, Wray DW, Richardson RS. Oral antioxidants improve leg blood flow during exercise in patients with chronic obstructive pulmonary disease. Am J Physiol Heart Circ Physiol 2015; 309:H977-85. [PMID: 26188020 DOI: 10.1152/ajpheart.00184.2015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 07/10/2015] [Indexed: 11/22/2022]
Abstract
The consequence of elevated oxidative stress on exercising skeletal muscle blood flow as well as the transport and utilization of O2 in patients with chronic obstructive pulmonary disease (COPD) is not well understood. The present study examined the impact of an oral antioxidant cocktail (AOC) on leg blood flow (LBF) and O2 consumption during dynamic exercise in 16 patients with COPD and 16 healthy subjects. Subjects performed submaximal (3, 6, and 9 W) single-leg knee extensor exercise while LBF (Doppler ultrasound), mean arterial blood pressure, leg vascular conductance, arterial O2 saturation, leg arterial-venous O2 difference, and leg O2 consumption (direct Fick) were evaluated under control conditions and after AOC administration. AOC administration increased LBF (3 W: 1,604 ± 100 vs. 1,798 ± 128 ml/min, 6 W: 1,832 ± 109 vs. 1,992 ± 120 ml/min, and 9W: 2,035 ± 114 vs. 2,187 ± 136 ml/min, P < 0.05, control vs. AOC, respectively), leg vascular conductance, and leg O2 consumption (3 W: 173 ± 12 vs. 210 ± 15 ml O2/min, 6 W: 217 ± 14 vs. 237 ± 15 ml O2/min, and 9 W: 244 ± 16 vs 260 ± 18 ml O2/min, P < 0.05, control vs. AOC, respectively) during exercise in COPD, whereas no effect was observed in healthy subjects. In addition, the AOC afforded a small, but significant, improvement in arterial O2 saturation only in patients with COPD. Thus, these data demonstrate a novel beneficial role of AOC administration on exercising LBF, O2 consumption, and arterial O2 saturation in patients with COPD, implicating oxidative stress as a potential therapeutic target for impaired exercise capacity in this population.
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Affiliation(s)
- Matthew J Rossman
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Department of Exercise and Sport Science, University of Utah, Salt Lake City, Utah
| | - Joel D Trinity
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - Ryan S Garten
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - Stephen J Ives
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Department of Health and Exercise Sciences, Skidmore College, Saratoga Springs, New York
| | - Jamie D Conklin
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Respiratory, Critical Care and Occupational Pulmonary Medicine, Department of Internal Medicine, University of Utah, Salt Lake City, Utah; and
| | - Zachary Barrett-O'Keefe
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Department of Exercise and Sport Science, University of Utah, Salt Lake City, Utah
| | - Melissa A H Witman
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - Amber D Bledsoe
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah
| | - David E Morgan
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah
| | - Sean Runnels
- Department of Anesthesiology, University of Utah, Salt Lake City, Utah
| | - Van R Reese
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - Jia Zhao
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - Markus Amann
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - D Walter Wray
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Department of Exercise and Sport Science, University of Utah, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah
| | - Russell S Richardson
- Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah; Department of Exercise and Sport Science, University of Utah, Salt Lake City, Utah; Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah;
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Puig-Vilanova E, Rodriguez DA, Lloreta J, Ausin P, Pascual-Guardia S, Broquetas J, Roca J, Gea J, Barreiro E. Oxidative stress, redox signaling pathways, and autophagy in cachectic muscles of male patients with advanced COPD and lung cancer. Free Radic Biol Med 2015; 79:91-108. [PMID: 25464271 DOI: 10.1016/j.freeradbiomed.2014.11.006] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 10/26/2014] [Accepted: 11/07/2014] [Indexed: 01/01/2023]
Abstract
Muscle dysfunction and wasting are predictors of mortality in advanced COPD and malignancies. Redox imbalance and enhanced protein catabolism are underlying mechanisms in COPD. We hypothesized that the expression profile of several biological markers share similarities in patients with cachexia associated with either COPD or lung cancer (LC). In vastus lateralis of cachectic patients with either LC (n=10) or advanced COPD (n=16) and healthy controls (n=10), markers of redox balance, inflammation, proteolysis, autophagy, signaling pathways, mitochondrial function, muscle structure, and sarcomere damage were measured using laboratory and light and electron microscopy techniques. Systemic redox balance and inflammation were also determined. All subjects were clinically evaluated. Compared to controls, in both cachectic groups of patients, a similar expression profile of different biological markers was observed in their muscles: increased levels of muscle protein oxidation and ubiquitination (p<0.05, both), which positively correlated (r=0.888), redox-sensitive signaling pathways (NF-κB and FoxO) were activated (p<0.05, all), fast-twitch fiber sizes were atrophied, muscle structural abnormalities and sarcomere disruptions were significantly greater (p<0.05, both). Structural and functional protein levels were lower in muscles of both cachectic patient groups than in controls (p<0.05, all). However, levels of autophagy markers including ultrastructural autophagosome counts were increased only in muscles of cachectic COPD patients (p<0.05). Systemic oxidative stress and inflammation levels were also increased in both patient groups compared to controls (p<0.005, both). Oxidative stress and redox-sensitive signaling pathways are likely to contribute to the etiology of muscle wasting and sarcomere disruption in patients with respiratory cachexia: LC and COPD.
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Affiliation(s)
- Ester Puig-Vilanova
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Diego A Rodriguez
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Josep Lloreta
- Pathology Department, IMIM-Hospital del Mar, Parc de Salut Mar, Barcelona, Spain
| | - Pilar Ausin
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Sergio Pascual-Guardia
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Joan Broquetas
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain
| | - Josep Roca
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain; Servei de Pneumologia (ICT), Hospital Clinic, IDIBAPS, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Joaquim Gea
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Esther Barreiro
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.
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Barreiro E, Gea J. Epigenetics and muscle dysfunction in chronic obstructive pulmonary disease. Transl Res 2015; 165:61-73. [PMID: 24794953 DOI: 10.1016/j.trsl.2014.04.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 04/02/2014] [Accepted: 04/08/2014] [Indexed: 01/05/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is a common, preventable, and treatable disease and a major leading cause of morbidity and mortality worldwide. In COPD, comorbidities, acute exacerbations, and systemic manifestations negatively influence disease severity and progression regardless of the respiratory condition. Skeletal muscle dysfunction, which is one of the commonest systemic manifestations in patients with COPD, has a tremendous impact on their exercise capacity and quality of life. Several pathophysiological and molecular underlying mechanisms including epigenetics (the process whereby gene expression is regulated by heritable mechanisms that do not affect DNA sequence) have been shown to participate in the etiology of COPD muscle dysfunction. The epigenetic modifications identified so far in cells include DNA methylation, histone acetylation and methylation, and noncoding RNAs such as microRNAs. Herein, we first review the role of epigenetic mechanisms in muscle development and adaptation to environmental factors in several models. Moreover, the epigenetic events reported so far to be potentially involved in muscle dysfunction and mass loss of patients with COPD are also discussed. Furthermore, the different expression profile of several muscle-enriched microRNAs in the diaphragm and vastus lateralis muscles of patients with COPD are also reviewed from results recently obtained in our group. The role of protein hyperacetylation in enhanced muscle protein catabolism of limb muscles is also discussed. Future research should focus on the full elucidation of the triggers of epigenetic mechanisms and their specific downstream biological pathways in COPD muscle dysfunction and wasting.
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Affiliation(s)
- Esther Barreiro
- Respiratory Medicine Department-Muscle and Respiratory System Research Unit, Institute of Medical Research of Hospital del Mar (IMIM)-Hospital del Mar, Parc de Salut Mar, Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain.
| | - Joaquim Gea
- Respiratory Medicine Department-Muscle and Respiratory System Research Unit, Institute of Medical Research of Hospital del Mar (IMIM)-Hospital del Mar, Parc de Salut Mar, Barcelona Biomedical Research Park (PRBB), Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
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21
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Li L, Hu L, Han LP, Ji H, Zhu Y, Wang X, Ge J, Xu M, Shen D, Dong H. Expression of turtle riboflavin-binding protein represses mitochondrial electron transport gene expression and promotes flowering in Arabidopsis. BMC PLANT BIOLOGY 2014; 14:381. [PMID: 25547226 PMCID: PMC4310184 DOI: 10.1186/s12870-014-0381-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 12/11/2014] [Indexed: 05/12/2023]
Abstract
BACKGROUND Recently we showed that de novo expression of a turtle riboflavin-binding protein (RfBP) in transgenic Arabidopsis increased H2O2 concentrations inside leaf cells, enhanced the expression of floral regulatory gene FD and floral meristem identity gene AP1 at the shoot apex, and induced early flowering. Here we report that RfBP-induced H2O2 presumably results from electron leakage at the mitochondrial electron transport chain (METC) and this source of H2O2 contributes to the early flowering phenotype. RESULTS While enhanced expression of FD and AP1 at the shoot apex was correlated with early flowering, the foliar expression of 13 of 19 METC genes was repressed in RfBP-expressing (RfBP+) plants. Inside RfBP+ leaf cells, cytosolic H2O2 concentrations were increased possibly through electron leakage because similar responses were also induced by a known inducer of electron leakage from METC. Early flowering no longer occurred when the repression on METC genes was eliminated by RfBP gene silencing, which restored RfBP+ to wild type in levels of FD and AP1 expression, H2O2, and flavins. Flowering was delayed by the external riboflavin application, which brought gene expression and flavins back to the steady-state levels but only caused 55% reduction of H2O2 concentrations in RfBP+ plants. RfBP-repressed METC gene expression remedied the cytosolic H2O2 diminution by genetic disruption of transcription factor NFXLl and compensated for compromises in FD and AP1 expression and flowering time. By contrast, RfBP resembled a peroxisomal catalase mutation, which augments the cytosolic H2O2, to enhance FD and AP1 expression and induce early flowering. CONCLUSIONS RfBP-repressed METC gene expression potentially causes electron leakage as one of cellular sources for the generation of H2O2 with the promoting effect on flowering. The repressive effect on METC gene expression is not the only way by which RfBP induces H2O2 and currently unappreciated factors may also function under RfBP+ background.
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Affiliation(s)
- Liang Li
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Li Hu
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Li-Ping Han
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Hongtao Ji
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Yueyue Zhu
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Xiaobing Wang
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Jun Ge
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Manyu Xu
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Dan Shen
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
| | - Hansong Dong
- Department of Plant Pathology, Nanjing Agricultural University and State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing, 210095 China
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Polverino F, Doyle-Eisele M, McDonald J, Wilder JA, Royer C, Laucho-Contreras M, Kelly EM, Divo M, Pinto-Plata V, Mauderly J, Celli BR, Tesfaigzi Y, Owen CA. A novel nonhuman primate model of cigarette smoke-induced airway disease. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 185:741-55. [PMID: 25542772 DOI: 10.1016/j.ajpath.2014.11.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/08/2014] [Accepted: 11/04/2014] [Indexed: 12/20/2022]
Abstract
Small animal models of chronic obstructive pulmonary disease (COPD) have several limitations for identifying new therapeutic targets and biomarkers for human COPD. These include a pulmonary anatomy that differs from humans, the limited airway pathologies and lymphoid aggregates that develop in smoke-exposed mice, and the challenges associated with serial biological sampling. Thus, we assessed the utility of cigarette smoke (CS)-exposed cynomolgus macaque as a nonhuman primate (NHP) large animal model of COPD. Twenty-eight NHPs were exposed to air or CS 5 days per week for up to 12 weeks. Bronchoalveolar lavage and pulmonary function tests were performed at intervals. After 12 weeks, we measured airway pathologies, pulmonary inflammation, and airspace enlargement. CS-exposed NHPs developed robust mucus metaplasia, submucosal gland hypertrophy and hyperplasia, airway inflammation, peribronchial fibrosis, and increases in bronchial lymphoid aggregates. Although CS-exposed NHPs did not develop emphysema over the study time, they exhibited pathologies that precede emphysema development, including increases in the following: i) matrix metalloproteinase-9 and proinflammatory mediator levels in bronchoalveolar lavage fluid, ii) lung parenchymal leukocyte counts and lymphoid aggregates, iii) lung oxidative stress levels, and iv) alveolar septal cell apoptosis. CS-exposed NHPs can be used as a model of airway disease occurring in COPD patients. Unlike rodents, NHPs can safely undergo longitudinal sampling, which could be useful for assessing novel biomarkers or therapeutics for COPD.
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Affiliation(s)
- Francesca Polverino
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; The Lovelace Respiratory Research Institute, Albuquerque, New Mexico; Pulmonary Department, University of Parma, Parma, Italy
| | | | - Jacob McDonald
- The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Julie A Wilder
- The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Christopher Royer
- The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Maria Laucho-Contreras
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Emer M Kelly
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Miguel Divo
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Victor Pinto-Plata
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Joe Mauderly
- The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Bartolome R Celli
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; The Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | | | - Caroline A Owen
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; The Lovelace Respiratory Research Institute, Albuquerque, New Mexico.
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West MA, Loughney L, Lythgoe D, Barben CP, Adams VL, Bimson WE, Grocott MPW, Jack S, Kemp GJ. The effect of neoadjuvant chemoradiotherapy on whole-body physical fitness and skeletal muscle mitochondrial oxidative phosphorylation in vivo in locally advanced rectal cancer patients--an observational pilot study. PLoS One 2014; 9:e111526. [PMID: 25478898 PMCID: PMC4257525 DOI: 10.1371/journal.pone.0111526] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 09/26/2014] [Indexed: 11/18/2022] Open
Abstract
Background In the United Kingdom, patients with locally advanced rectal cancer routinely receive neoadjuvant chemoradiotherapy. However, the effects of this on physical fitness are unclear. This pilot study is aimed to investigate the effect of neoadjuvant chemoradiotherapy on objectively measured in vivo muscle mitochondrial function and whole-body physical fitness. Methods We prospectively studied 12 patients with rectal cancer who completed standardized neoadjuvant chemoradiotherapy, recruited from a large tertiary cancer centre, between October 2012 and July 2013. All patients underwent a cardiopulmonary exercise test and a phosphorus magnetic resonance spectroscopy quadriceps muscle exercise-recovery study before and after neoadjuvant chemoradiotherapy. Data were analysed and reported blind to patient identity and clinical course. Primary variables of interest were the two physical fitness measures; oxygen uptake at estimated anaerobic threshold and oxygen uptake at Peak exercise (ml.kg−1.min−1), and the post-exercise phosphocreatine recovery rate constant (min−1), a measure of muscle mitochondrial capacity in vivo. Results Median age was 67 years (IQR 64–75). Differences (95%CI) in all three primary variables were significantly negative post-NACRT: Oxygen uptake at estimated anaerobic threshold −2.4 ml.kg−1.min−1 (−3.8, −0.9), p = 0.004; Oxygen uptake at Peak −4.0 ml.kg−1.min−1 (−6.8, −1.1), p = 0.011; and post-exercise phosphocreatine recovery rate constant −0.34 min−1 (−0.51, −0.17), p<0.001. Conclusion The significant decrease in both whole-body physical fitness and in vivo muscle mitochondrial function raises the possibility that muscle mitochondrial mechanisms, no doubt multifactorial, may be important in deterioration of physical fitness following neoadjuvant chemoradiotherapy. This may have implications for targeted interventions to improve physical fitness pre-surgery. Trial Registration Clinicaltrials.gov registration NCT01859442
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Affiliation(s)
- Malcolm A. West
- Colorectal Surgery Research Group, Aintree University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
- Department of Musculoskeletal Biology and MRC – Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom
- Magnetic Resonance and Image Analysis Research Centre (MARIARC), University of Liverpool, Liverpool, United Kingdom
- * E-mail:
| | - Lisa Loughney
- Colorectal Surgery Research Group, Aintree University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
- Critical Care Research Area, Southampton NIHR Respiratory Biomedical Research Unit, Southampton, United Kingdom
- Anaesthesia and Critical Care Research Unit, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Daniel Lythgoe
- Cancer Research UK Liverpool Cancer Trials Unit, University of Liverpool, Liverpool, United Kingdom
| | - Christopher P. Barben
- Colorectal Surgery Research Group, Aintree University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
| | - Valerie L. Adams
- Magnetic Resonance and Image Analysis Research Centre (MARIARC), University of Liverpool, Liverpool, United Kingdom
| | - William E. Bimson
- Magnetic Resonance and Image Analysis Research Centre (MARIARC), University of Liverpool, Liverpool, United Kingdom
| | - Michael P. W. Grocott
- Colorectal Surgery Research Group, Aintree University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
- Department of Musculoskeletal Biology and MRC – Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom
- Critical Care Research Area, Southampton NIHR Respiratory Biomedical Research Unit, Southampton, United Kingdom
- Anaesthesia and Critical Care Research Unit, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
- Integrative Physiology and Critical Illness Group, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Sandy Jack
- Colorectal Surgery Research Group, Aintree University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
- Department of Musculoskeletal Biology and MRC – Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom
- Critical Care Research Area, Southampton NIHR Respiratory Biomedical Research Unit, Southampton, United Kingdom
- Anaesthesia and Critical Care Research Unit, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
- Integrative Physiology and Critical Illness Group, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Graham J. Kemp
- Department of Musculoskeletal Biology and MRC – Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom
- Magnetic Resonance and Image Analysis Research Centre (MARIARC), University of Liverpool, Liverpool, United Kingdom
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Ji H, Zhu Y, Tian S, Xu M, Tian Y, Li L, Wang H, Hu L, Ji Y, Ge J, Wen W, Dong H. Downregulation of leaf flavin content induces early flowering and photoperiod gene expression in Arabidopsis. BMC PLANT BIOLOGY 2014; 14:237. [PMID: 25201173 PMCID: PMC4172855 DOI: 10.1186/s12870-014-0237-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 08/20/2014] [Indexed: 05/26/2023]
Abstract
BACKGROUND Riboflavin is the precursor of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), essential cofactors for many metabolic enzymes that catalyze a variety of biochemical reactions. Previously we showed that free flavin (riboflavin, FMN, and FAD) concentrations were decreased in leaves of transgenic Arabidopsis plants expressing a turtle riboflavin-binding protein (RfBP). Here, we report that flavin downregulation by RfBP induces the early flowering phenotype and enhances expression of floral promoting photoperiod genes. RESULTS Early flowering was a serendipitous phenomenon and was prudently characterized as a constant phenotype of RfBP-expressing transgenic Arabidopsis plants in both long days and short days. The phenotype was eliminated when leaf free flavins were brought back to the steady-state levels either by the RfBP gene silencing and consequently nullified production of the RfBP protein, or by external riboflavin feeding treatment. RfBP-induced early flowering was correlated with enhanced expression of floral promoting photoperiod genes and the florigen gene FT in leaves but not related to genes assigned to vernalization, autonomous, and gibberellin pathways, which provide flowering regulation mechanisms alternative to the photoperiod. RfBP-induced early flowering was further correlated with increased expression of the FD gene encoding bZIP transcription factor FD essential for flowering time control and the floral meristem identity gene AP1 in the shoot apex. By contrast, the expression of FT and photoperiod genes in leaves and the expression of FD and AP1 in the shoot apex were no longer enhanced when the RfBP gene was silenced, RfBP protein production canceled, and flavin concentrations were elevated to the steady-state levels inside plant leaves. CONCLUSIONS Token together, our results provide circumstantial evidence that downregulation of leaf flavin content by RfBP induces early flowering and coincident enhancements of genes that promote flowering through the photoperiod pathway.
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Affiliation(s)
- Hongtao Ji
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Yueyue Zhu
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Shan Tian
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Manyu Xu
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Yimin Tian
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Liang Li
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Huan Wang
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Li Hu
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Yu Ji
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Jun Ge
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Weigang Wen
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
| | - Hansong Dong
- Plant Growth and Defense Signaling Laboratory, State Ministry of Education Key Laboratory of Integrated Management of Crop Pathogens and Insect Pests, Nanjing Agricultural University, Nanjing, 210095 China
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25
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Barreiro E. Protein carbonylation and muscle function in COPD and other conditions. MASS SPECTROMETRY REVIEWS 2014; 33:219-236. [PMID: 24167039 DOI: 10.1002/mas.21394] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 06/17/2013] [Accepted: 06/17/2013] [Indexed: 06/02/2023]
Abstract
Skeletal muscle, the most abundant tissue in mammals, is essential for any activity in life. Muscle dysfunction is a common systemic manifestation in highly prevalent conditions such as chronic obstructive pulmonary disease (COPD), cancer cachexia, and sepsis. It has a significant impact on exercise tolerance, thus worsening the patients' quality of life and survival. Among several factors, oxidative stress is a major player in the etiology of skeletal muscle dysfunction associated with those conditions. Whereas low levels of oxidants are absolutely required for normal cell adaptation, high levels of reactive oxygen species (ROS) alter the function and structure of molecules such as proteins, DNA, and lipids. Specifically, protein carbonylation, a common variety of protein oxidation, was shown to alter the function of key enzymes and structural proteins involved in muscle contractile performance. Moreover, increased levels of ROS may also activate proteolytic systems, thus leading to enhanced protein breakdown in several models. In the current review, the specific modifications induced by carbonylation in protein structure and function in muscles have been described. Furthermore, the potential role of ROS in the activation of proteolytic systems in skeletal muscles is also discussed. The review summarizes the effects of protein carbonylation on muscles in several models and conditions such as COPD, disuse muscle atrophy, cancer cachexia, sepsis, and aging. Future research should focus on the elucidation of the specific protein sites modified by ROS in these muscles using redox proteomics analyses and on the assessment of the consequent alterations in protein function and stability.
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Affiliation(s)
- Esther Barreiro
- Pulmonology Department-Muscle Research, Respiratory System Unit (URMAR), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM)-Hospital del Mar, Department of Experimental, Health Sciences (CEXS), Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona (PRBB), Dr. Aiguader, 88, Barcelona, Spain; Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Bunyola, Majorca, Balearic Islands, Spain
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26
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Mathur S, Brooks D, Carvalho CRF. Structural alterations of skeletal muscle in copd. Front Physiol 2014; 5:104. [PMID: 24678302 PMCID: PMC3958732 DOI: 10.3389/fphys.2014.00104] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 03/01/2014] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a respiratory disease associated with a systemic inflammatory response. Peripheral muscle dysfunction has been well characterized in individuals with COPD and results from a complex interaction between systemic and local factors. OBJECTIVE In this narrative review, we will describe muscle wasting in people with COPD, the associated structural changes, muscle regenerative capacity and possible mechanisms for muscle wasting. We will also discuss how structural changes relate to impaired muscle function and mobility in people with COPD. Key Observations: Approximately 30-40% of individuals with COPD experience muscle mass depletion. Furthermore, muscle atrophy is a predictor of physical function and mortality in this population. Associated structural changes include a decreased proportion and size of type-I fibers, reduced oxidative capacity and mitochondrial density mainly in the quadriceps. Observations related to impaired muscle regenerative capacity in individuals with COPD include a lower proportion of central nuclei in the presence or absence of muscle atrophy and decreased maximal telomere length, which has been correlated with reduced muscle cross-sectional area. Potential mechanisms for muscle wasting in COPD may include excessive production of reactive oxygen species (ROS), altered amino acid metabolism and lower expression of peroxisome proliferator-activated receptors-gamma-coactivator 1-alpha mRNA. Despite a moderate relationship between muscle atrophy and function, impairments in oxidative metabolism only seems weakly related to muscle function. CONCLUSION This review article demonstrates the cellular modifications in the peripheral muscle of people with COPD and describes the evidence of its relationship to muscle function. Future research will focus on rehabilitation strategies to improve muscle wasting and maximize function.
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Affiliation(s)
- Sunita Mathur
- Department of Physical Therapy, University of Toronto Toronto, ON, Canada
| | - Dina Brooks
- Department of Physical Therapy, University of Toronto Toronto, ON, Canada
| | - Celso R F Carvalho
- Department of Physical Therapy, University of São Paulo São Paulo, Brazil
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Slot IGM, van den Borst B, Hellwig VACV, Barreiro E, Schols AMWJ, Gosker HR. The muscle oxidative regulatory response to acute exercise is not impaired in less advanced COPD despite a decreased oxidative phenotype. PLoS One 2014; 9:e90150. [PMID: 24587251 PMCID: PMC3938598 DOI: 10.1371/journal.pone.0090150] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 01/28/2014] [Indexed: 12/31/2022] Open
Abstract
Already in an early disease stage, patients with chronic obstructive pulmonary disease (COPD) are confronted with impaired skeletal muscle function and physical performance due to a loss of oxidative type I muscle fibers and oxidative capacity (i.e. oxidative phenotype; Oxphen). Physical activity is a well-known stimulus of muscle Oxphen and crucial for its maintenance. We hypothesized that a blunted response of Oxphen genes to an acute bout of exercise could contribute to decreased Oxphen in COPD. For this, 28 patients with less advanced COPD (age 65±7 yrs, FEV1 59±16% predicted) and 15 age- and gender-matched healthy controls performed an incremental cycle ergometry test. The Oxphen response to exercise was determined by the measurement of gene expression levels of Oxphen markers in pre and 4h-post exercise quadriceps biopsies. Because exercise-induced hypoxia and oxidative stress may interfere with Oxphen response, oxygen saturation and oxidative stress markers were assessed as well. Regardless of oxygen desaturation and absolute exercise intensities, the Oxphen regulatory response to exercise was comparable between COPD patients and controls with no evidence of increased oxidative stress. In conclusion, the muscle Oxphen regulatory response to acute exercise is not blunted in less advanced COPD, regardless of exercise-induced hypoxia. Hence, this study provides further rationale for incorporation of exercise training as integrated part of disease management to prevent or slow down loss of muscle Oxphen and related functional impairment in COPD.
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Affiliation(s)
- Ilse G. M. Slot
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Bram van den Borst
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Valéry A. C. V. Hellwig
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Esther Barreiro
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), Research Institute of Hospital del Mar (IMIM), Department of Experimental and Health Sciences (CEXS), Pompeu Fabra University (UPF), Barcelona Biomedical Research Park (PRBB), Barcelona, Spain
- Network of Excellence in Respiratory Research (CIBERES), Institute of Health Carlos III (ISCIII), Bunyola, Majorca, Balearic Islands, Spain
| | - Annemie M. W. J. Schols
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Harry R. Gosker
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
- * E-mail:
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Crane JD, Abadi A, Hettinga BP, Ogborn DI, MacNeil LG, Steinberg GR, Tarnopolsky MA. Elevated mitochondrial oxidative stress impairs metabolic adaptations to exercise in skeletal muscle. PLoS One 2013; 8:e81879. [PMID: 24324727 PMCID: PMC3855701 DOI: 10.1371/journal.pone.0081879] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 10/17/2013] [Indexed: 11/18/2022] Open
Abstract
Mitochondrial oxidative stress is a complex phenomenon that is inherently tied to energy provision and is implicated in many metabolic disorders. Exercise training increases mitochondrial oxidative capacity in skeletal muscle yet it remains unclear if oxidative stress plays a role in regulating these adaptations. We demonstrate that the chronic elevation in mitochondrial oxidative stress present in Sod2 (+/-) mice impairs the functional and biochemical mitochondrial adaptations to exercise. Following exercise training Sod2 (+/-) mice fail to increase maximal work capacity, mitochondrial enzyme activity and mtDNA copy number, despite a normal augmentation of mitochondrial proteins. Additionally, exercised Sod2 (+/-) mice cannot compensate for their higher amount of basal mitochondrial oxidative damage and exhibit poor electron transport chain complex assembly that accounts for their compromised adaptation. Overall, these results demonstrate that chronic skeletal muscle mitochondrial oxidative stress does not impact exercise induced mitochondrial biogenesis, but impairs the resulting mitochondrial protein function and can limit metabolic plasticity.
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Affiliation(s)
- Justin D. Crane
- Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Arkan Abadi
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Bart P. Hettinga
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | - Daniel I. Ogborn
- Department of Medical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Lauren G. MacNeil
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
| | | | - Mark A. Tarnopolsky
- Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada
- Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
- *
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Aravamudan B, Thompson MA, Pabelick CM, Prakash YS. Mitochondria in lung diseases. Expert Rev Respir Med 2013; 7:631-46. [PMID: 23978003 DOI: 10.1586/17476348.2013.834252] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Mitochondria are autonomous cellular organelles that oversee a variety of functions such as metabolism, energy production, calcium buffering and cell fate determination. Regulation of their morphology and diverse activities beyond energy production are being recognized as playing major roles in cellular health and dysfunction. This review is aimed at summarizing what is known regarding mitochondrial contributions to pathogenesis of lung diseases. Emphasis is given to understanding the importance of structural and functional aspects of mitochondria in both normal cellular function (based on knowledge from other cell types) and in development and modulation of lung diseases such as asthma, chronic obstructive pulmonary disease, cystic fibrosis and cancer. Emerging techniques that allow examination of mitochondria, and potential strategies to target mitochondria in the treatment of lung diseases are also discussed.
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Affiliation(s)
- Bharathi Aravamudan
- Departments of Anesthesiology, Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905 USA
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Cloonan SM, Choi AMK. Mitochondria: sensors and mediators of innate immune receptor signaling. Curr Opin Microbiol 2013; 16:327-38. [PMID: 23757367 PMCID: PMC6010029 DOI: 10.1016/j.mib.2013.05.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/06/2013] [Accepted: 05/13/2013] [Indexed: 12/14/2022]
Abstract
By integrating stress signals with inputs from other cellular organelles, eukaryotic mitochondria are dynamic sensing systems that can confer substantial impact on innate immune signaling in both health and disease. This review highlights recently discovered elements of innate immune receptor signaling (TLR, RLR, NLR, and CLR) associated with mitochondrial function and discusses the role of mitochondria in the initiation and/or manifestation of inflammatory diseases and disorders. We also highlight the role of mitochondria as therapeutic targets for inflammatory disease.
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Affiliation(s)
- Suzanne M Cloonan
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA
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31
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Ngkelo A, Adcock IM. New treatments for COPD. Curr Opin Pharmacol 2013; 13:362-9. [DOI: 10.1016/j.coph.2013.03.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/03/2013] [Accepted: 03/28/2013] [Indexed: 12/20/2022]
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Abstract
Muscle dysfunction often occurs in patients with chronic obstructive pulmonary disease (COPD) and may involve both respiratory and locomotor (peripheral) muscles. The loss of strength and/or endurance in the former can lead to ventilatory insufficiency, whereas in the latter it limits exercise capacity and activities of daily life. Muscle dysfunction is the consequence of complex interactions between local and systemic factors, frequently coexisting in COPD patients. Pulmonary hyperinflation along with the increase in work of breathing that occur in COPD appear as the main contributing factors to respiratory muscle dysfunction. By contrast, deconditioning seems to play a key role in peripheral muscle dysfunction. However, additional systemic factors, including tobacco smoking, systemic inflammation, exercise, exacerbations, nutritional and gas exchange abnormalities, anabolic insufficiency, comorbidities and drugs, can also influence the function of both respiratory and peripheral muscles, by inducing modifications in their local microenvironment. Under all these circumstances, protein metabolism imbalance, oxidative stress, inflammatory events, as well as muscle injury may occur, determining the final structure and modulating the function of different muscle groups. Respiratory muscles show signs of injury as well as an increase in several elements involved in aerobic metabolism (proportion of type I fibers, capillary density, and aerobic enzyme activity) whereas limb muscles exhibit a loss of the same elements, injury, and a reduction in fiber size. In the present review we examine the current state of the art of the pathophysiology of muscle dysfunction in COPD.
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Affiliation(s)
- Joaquim Gea
- Servei de Pneumologia, Hospital del Mar-IMIM, Universitat Pompeu Fabra, Barcelona, Spain
- CIBER de Enfermedades Respiratorias (CIBERES), ISCIII, Bunyola, Spain
| | - Alvar Agustí
- CIBER de Enfermedades Respiratorias (CIBERES), ISCIII, Bunyola, Spain
- Servei de Pneumologia, Institut del Tòrax. Hospital Clínic-IDIBAPS, Universitat de Barcelona, Barcelona, Spain; and
- Fundació Investigació Sanitària Illes Balears (FISIB), Mallorca, Spain
| | - Josep Roca
- CIBER de Enfermedades Respiratorias (CIBERES), ISCIII, Bunyola, Spain
- Servei de Pneumologia, Institut del Tòrax. Hospital Clínic-IDIBAPS, Universitat de Barcelona, Barcelona, Spain; and
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van den Borst B, Slot IGM, Hellwig VACV, Vosse BAH, Kelders MCJM, Barreiro E, Schols AMWJ, Gosker HR. Loss of quadriceps muscle oxidative phenotype and decreased endurance in patients with mild-to-moderate COPD. J Appl Physiol (1985) 2013; 114:1319-28. [DOI: 10.1152/japplphysiol.00508.2012] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Being well-established in advanced chronic obstructive pulmonary disease (COPD), skeletal muscle dysfunction and its underlying pathology have been scarcely investigated in patients with mild-to-moderate airflow obstruction. We hypothesized that a loss of oxidative phenotype (oxphen) associated with decreased endurance is present in the skeletal muscle of patients with mild-to-moderate COPD. In quadriceps muscle biopsies from 29 patients with COPD (forced expiratory volume in 1 s [FEV1] 58 ± 16%pred, body mass index [BMI] 26 ± 4 kg/m2) and 15 controls (BMI 25 ± 3 kg/m2) we assessed fiber type distribution, fiber cross-sectional areas (CSA), oxidative and glycolytic gene expression, OXPHOS protein levels, metabolic enzyme activity, and levels of oxidative stress markers. Quadriceps function was assessed by isokinetic dynamometry, body composition by dual-energy X-ray absorptiometry, exercise capacity by an incremental load test, and physical activity level by accelerometry. Compared with controls, patients had comparable fat-free mass index, quadriceps strength, and fiber CSA, but quadriceps endurance was decreased by 29% ( P = 0.002). Patients with COPD had a clear loss of muscle oxphen: a fiber type I-to-II shift, decreased levels of OXPHOS complexes IV and V subunits (47% and 31%, respectively; P < 0.05), a decreased ratio of 3-hydroxyacyl-CoA dehydrogenase/phosphofructokinase (PFK) enzyme activities (38%, P < 0.05), and decreased peroxisome proliferator-activated receptor-γ coactivator-1α (40%; P < 0.001) vs. increased PFK (67%; P < 0.001) gene expression levels. Within the patient group, markers of oxphen were significantly positively correlated with quadriceps endurance and inversely with the increase in plasma lactate relative to work rate during the incremental test. Levels of protein carbonylation, tyrosine nitration, and malondialdehyde protein adducts were comparable between patients and controls. However, among patients, oxidative stress levels were significantly inversely correlated with markers of oxphen and quadriceps endurance. Reduced muscle endurance associated with underlying loss of muscle oxphen is already present in patients with mild-to-moderate COPD without muscle wasting.
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Affiliation(s)
- Bram van den Borst
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Ilse G. M. Slot
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Valéry A. C. V. Hellwig
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Bettine A. H. Vosse
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Marco C. J. M. Kelders
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Esther Barreiro
- Pulmonology Department-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain, and Centro de Investigación en Red de Enfermedades Respiratorias, Instituto de Salud Carlos III, Bunyola, Majorca, Balearic Islands, Spain
| | - Annemie M. W. J. Schols
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Harry R. Gosker
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
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Remels AHV, Gosker HR, Langen RCJ, Schols AMWJ. The mechanisms of cachexia underlying muscle dysfunction in COPD. J Appl Physiol (1985) 2013; 114:1253-62. [DOI: 10.1152/japplphysiol.00790.2012] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Pulmonary cachexia is a prevalent, debilitating, and well-recognized feature of COPD associated with increased mortality and loss of peripheral and respiratory muscle function. The exact cause and underlying mechanisms of cachexia in COPD are still poorly understood. Increasing evidence, however, shows that pathological changes in intracellular mechanisms of muscle mass maintenance (i.e., protein turnover and myonuclear turnover) are likely involved. Potential factors triggering alterations in these mechanisms in COPD include oxidative stress, myostatin, and inflammation. In addition to muscle wasting, peripheral muscle in COPD is characterized by a fiber-type shift toward a more type II, glycolytic phenotype and an impaired oxidative capacity (collectively referred to as an impaired oxidative phenotype). Atrophied diaphragm muscle in COPD, however, displays an enhanced oxidative phenotype. Interestingly, intrinsic abnormalities in (lower limb) peripheral muscle seem more pronounced in either cachectic patients or weight loss-susceptible emphysema patients, suggesting that muscle wasting and intrinsic changes in peripheral muscle's oxidative phenotype are somehow intertwined. In this manuscript, we will review alterations in mechanisms of muscle mass maintenance in COPD and discuss the involvement of oxidative stress, inflammation, and myostatin as potential triggers of cachexia. Moreover, we postulate that an impaired muscle oxidative phenotype in COPD can accelerate the process of cachexia, as it renders muscle in COPD less energy efficient, thereby contributing to an energy deficit and weight loss when not dietary compensated. Furthermore, loss of peripheral muscle oxidative phenotype may increase the muscle's susceptibility to inflammation- and oxidative stress-induced muscle damage and wasting.
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Affiliation(s)
- A. H. V. Remels
- NUTRIM School for Nutrition, Toxicology and Metabolism, Department of Respiratory Medicine, Maastricht University Medical Centre +, Maastricht, the Netherlands
| | - H. R. Gosker
- NUTRIM School for Nutrition, Toxicology and Metabolism, Department of Respiratory Medicine, Maastricht University Medical Centre +, Maastricht, the Netherlands
| | - R. C. J. Langen
- NUTRIM School for Nutrition, Toxicology and Metabolism, Department of Respiratory Medicine, Maastricht University Medical Centre +, Maastricht, the Netherlands
| | - A. M. W. J. Schols
- NUTRIM School for Nutrition, Toxicology and Metabolism, Department of Respiratory Medicine, Maastricht University Medical Centre +, Maastricht, the Netherlands
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Fermoselle C, García-Arumí E, Puig-Vilanova E, Andreu AL, Urtreger AJ, de Kier Joffé EDB, Tejedor A, Puente-Maestu L, Barreiro E. Mitochondrial dysfunction and therapeutic approaches in respiratory and limb muscles of cancer cachectic mice. Exp Physiol 2013; 98:1349-65. [PMID: 23625954 DOI: 10.1113/expphysiol.2013.072496] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? We explored whether experimental cancer-induced cachexia may alter mitochondrial respiratory chain (MRC) complexes and oxygen uptake in respiratory and peripheral muscles,and whether signalling pathways, proteasome and oxidative stress influence that process. What is the main finding and what is its importance? In cancer cachectic mice, MRC complexes and oxygen consumption were decreased in the diaphragm and gastrocnemius. Blockade of nuclear factor-κB and mitogen-activated protein kinase actions partly restored the muscle mass and force and corrected the MRC dysfunction,while concomitantly reducing tumour burden. Antioxidants improved mitochondrial oxygen consumption without eliciting effects on the loss of muscle mass and force or the tumour size,whereas bortezomib reduced tumour burden without influencing muscle mass and strength or MRC function. Abnormalities in mitochondrial content, morphology and function have been reported in several muscle-wasting conditions. We specifically explored whether experimental cancer-induced cachexia may alter mitochondrial respiratory chain (MRC) complexes and oxygen uptake in respiratory and peripheral muscles, and whether signalling pathways, proteasomes and oxidative stress may influence that process. We evaluated complex I, II and IV enzyme activities (specific activity assays) and MRC oxygen consumption (polarographic measurements) in diaphragm and gastrocnemius of cachectic mice bearing the LP07 lung tumour, with and without treatment with N-acetylcysteine, bortezomib and nuclear factor-κB (sulfasalazine) and mitogen-activated protein kinases (MAPK, U0126) inhibitors (n = 10 per group for all groups). Whole-body and muscle weights and limb muscle force were also assessed in all rodents at baseline and after 1 month. Compared with control animals, cancer cachectic mice showed a significant reduction in body weight gain, smaller sizes of the diaphragm and gastrocnemius, lower muscle strength, decreased activity of complexes I, II and IV and decreased oxygen consumption in both muscles. Blockade of nuclear factor-κB and MAPK actions restored muscle mass and force and corrected the MRC dysfunction in both muscles, while partly reducing tumour burden. Antioxidants improved mitochondrial oxygen uptake without eliciting significant effects on the loss of muscle mass and force or tumour size, whereas the proteasome inhibitor reduced tumour burden without significantly influencing muscle mass and strength or mitochondrial function. In conclusion, nuclear factor-κB and MAPK signalling pathways modulate muscle mass and performance and MRC function of respiratory and limb muscles in this model of experimental cancer cachexia, thus offering targets for therapeutic intervention.
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Affiliation(s)
- Clara Fermoselle
- Pulmonology Department, Lung Cancer Group, IMIM-Hospital del Mar, Universitat Pompeu Fabra, Barcelona Biomedical Resarch Park, Barcelona, Spain
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Stasko SA, Hardin BJ, Smith JD, Moylan JS, Reid MB. TNF signals via neuronal-type nitric oxide synthase and reactive oxygen species to depress specific force of skeletal muscle. J Appl Physiol (1985) 2013; 114:1629-36. [PMID: 23558387 DOI: 10.1152/japplphysiol.00871.2012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
TNF promotes skeletal muscle weakness, in part, by depressing specific force of muscle fibers. This is a rapid, receptor-mediated response, in which TNF stimulates cellular oxidant production, causing myofilament dysfunction. The oxidants appear to include nitric oxide (NO); otherwise, the redox mechanisms that underlie this response remain undefined. The current study tested the hypotheses that 1) TNF signals via neuronal-type NO synthase (nNOS) to depress specific force, and 2) muscle-derived reactive oxygen species (ROS) are essential co-mediators of this response. Mouse diaphragm fiber bundles were studied using live cell assays. TNF exposure increased general oxidant activity (P < 0.05; 2',7'-dichlorodihydrofluorescein diacetate assay) and NO activity (P < 0.05; 4-amino-5-methylamino-2',7'-difluorofluorescein diacetate assay) and depressed specific force across the full range of stimulus frequencies (1-300 Hz; P < 0.05). These responses were abolished by pretreatment with N(ω)-nitro-L-arginine methyl ester (L-NAME; a nonspecific inhibitor of NOS activity), confirming NO involvement. Genetic nNOS deficiency replicated L-NAME effects on TNF-treated muscle, diminishing NO activity (-80%; P < 0.05) and preventing the decrement in specific force (P < 0.05). Comparable protection was achieved by selective depletion of muscle-derived ROS. Pretreatment with either SOD (degrades superoxide anion) or catalase (degrades hydrogen peroxide) depressed oxidant activity in TNF-treated muscle and abolished the decrement in specific force. These findings indicate that TNF signals via nNOS to depress contractile function, a response that requires ROS and NO as obligate co-mediators.
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Affiliation(s)
- Shawn A Stasko
- Department of Physiology and Center for Muscle Biology, University of Kentucky, Lexington, Kentucky 40356-0298, USA
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Meyer A, Zoll J, Charles AL, Charloux A, de Blay F, Diemunsch P, Sibilia J, Piquard F, Geny B. Skeletal muscle mitochondrial dysfunction during chronic obstructive pulmonary disease: central actor and therapeutic target. Exp Physiol 2013; 98:1063-78. [DOI: 10.1113/expphysiol.2012.069468] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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38
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Resveratrol affects differently rat liver and brain mitochondrial bioenergetics and oxidative stress in vitro: Investigation of the role of gender. Food Chem Toxicol 2013. [DOI: 10.1016/j.fct.2012.11.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Puente-Maestu L, Lázaro A, Humanes B. Metabolic derangements in COPD muscle dysfunction. J Appl Physiol (1985) 2013; 114:1282-90. [PMID: 23288549 DOI: 10.1152/japplphysiol.00815.2012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Mitochondrial muscle alterations are common in patients with chronic obstructive pulmonary disease (COPD) and manifest mainly as decreased oxidative capacity and excessive production of reactive oxygen species (ROS). The significant loss of oxidative capacity observed in the quadriceps of COPD patients is mainly due to reduced mitochondrial content in the fibers, a finding consistent with the characteristic loss of type I fibers observed in that muscle. Decreased oxidative capacity does not directly limit maximum performance; however, it is associated with increased lactate production at lower exercise intensity and reduced endurance. Since type I fiber atrophy does not occur in respiratory muscles, the loss of such fibers in the quadriceps could be to the result of disuse. In contrast, excessive production of ROS and oxidative stress are observed in both the respiratory muscles and the quadriceps of COPD patients. The causes of increased ROS production are not clear, and a number of different mechanisms can play a role. Several mitochondrial alterations in the quadriceps of COPD patients are similar to those observed in diabetic patients, thus suggesting a role for muscle alterations in this comorbidity. Amino acid metabolism is also altered. Expression of peroxisome proliferator-activated receptor-γ coactivator-1α mRNA is low in the quadriceps of COPD patients, which could also be a consequence of type I fiber loss; nevertheless, its response to exercise is not altered. Patterns of muscle cytochrome oxidase gene activation after training differ between COPD patients and healthy subjects, and the profile is consistent with hypoxic stress, even in nonhypoxic patients.
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Affiliation(s)
- Luis Puente-Maestu
- Servicio de Neumología, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
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Lo KY, Zhu Y, Tsai HF, Sun YS. Effects of shear stresses and antioxidant concentrations on the production of reactive oxygen species in lung cancer cells. BIOMICROFLUIDICS 2013; 7:64108. [PMID: 24396542 PMCID: PMC3862592 DOI: 10.1063/1.4836675] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 11/16/2013] [Indexed: 05/16/2023]
Abstract
Reactive oxygen species (ROS) are known to be a key factor in the development of cancer, and many exogenous sources are supposed to be related to the formation of ROS. In this paper, a microfluidic chip was developed for studying the production of ROS in lung cancer cells under different chemical and physical stimuli. This chip has two unique features: (1) five relative concentrations of 0, 1/8, 1/2, 7/8, and 1 are achieved in the culture regions; (2) a shear stress gradient is produced inside each of the five culture areas. Lung cancer cells were seeded inside this biocompatible chip for investigating their response to different concentrations of H2O2, a chemical stimulus known to increase the production of ROS. Then the effect of shear stress, a physical stimulus, on lung cancer cells was examined, showing that the production of ROS was increased in response to a larger shear stress. Finally, two antioxidants, α-tocopherol and ferulic acid, were used to study their effects on reducing ROS. It was found that high-dose α-tocopherol was not able to effectively eliminate the ROS produced inside cells. This counter effect was not observed in cells cultured in a traditional chamber slide, where no shear stress was present. This result suggests that the current microfluidic chip provides an in vitro platform best mimicking the physiological condition where cells are under circulating conditions.
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Affiliation(s)
- Kai-Yin Lo
- Department of Agricultural Chemistry, National Taiwan University, Taipei City 10617, Taiwan
| | - Yun Zhu
- Department of Agricultural Chemistry, National Taiwan University, Taipei City 10617, Taiwan
| | - Hsieh-Fu Tsai
- Research Center for Applied Sciences, Academia Sinica, Taipei City 11529, Taiwan
| | - Yung-Shin Sun
- Department of Physics, Fu-Jen Catholic University, New Taipei City 24205, Taiwan
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