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Addinsall AB, Cacciani N, Moruzzi N, Akkad H, Maestri A, Berggren PO, Widegren A, Bergquist J, Tchkonia T, Kirkland JL, Larsson L. Ruxolitinib: A new hope for ventilator-induced diaphragm dysfunction. Acta Physiol (Oxf) 2024; 240:e14128. [PMID: 38551103 DOI: 10.1111/apha.14128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/21/2024] [Accepted: 02/27/2024] [Indexed: 04/24/2024]
Abstract
AIM Mechanical ventilation (MV) results in diminished diaphragm size and strength, termed ventilator-induced diaphragm dysfunction (VIDD). VID increases dependence, prolongs weaning, and increases discharge mortality rates. The Janus kinase (JAK)/Signal Transducer and Activator of Transcription (STAT) pathway is implicated in VIDD, upregulated following MV. JAK/STAT inhibition alleviates chronic muscle wasting conditions. This study aimed to explore the therapeutic potential of Ruxolitinib, an FDA approved JAK1/2 inhibitor (JI) for the treatment of VIDD. METHODS Rats were subjected to 5 days controlled MV (CMV) with and without daily Ruxolitinib gavage. Muscle fiber size and function were assessed. RNAseq, mitochondrial morphology, respirometry, and mass spectrometry were determined. RESULTS CMV significantly reduced diaphragm size and specific force by 45% (p < 0.01), associated with a two-fold P-STAT3 upregulation (p < 0.001). CMV disrupted mitochondrial content and reduced the oxygen consumption rate (p < 0.01). Expression of the motor protein myosin was unaffected, however CMV alters myosin function via post-translational modifications (PTMs). Daily administration of JI increased animal survival (40% vs. 87%; p < 0.05), restricted P-STAT3 (p < 0.001), and preserved diaphragm size and specific force. JI was associated with preserved mitochondrial content and respiratory function (p < 0.01), and the reversal or augmentation of myosin deamidation PTMs of the rod and head region. CONCLUSION JI preserved diaphragm function, leading to increased survival in an experimental model of VIDD. Functional enhancement was associated with maintenance of mitochondrial content and respiration and the reversal of ventilator-induced PTMs of myosin. These results demonstrate the potential of repurposing Ruxolitinib for treatment of VIDD.
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Affiliation(s)
- Alex B Addinsall
- Basic and Clinical Muscle Biology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Nicola Cacciani
- Basic and Clinical Muscle Biology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
| | - Noah Moruzzi
- Department of Molecular Medicine and Surgery, The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institute, Stockholm, Sweden
| | - Hazem Akkad
- Basic and Clinical Muscle Biology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Alice Maestri
- Center for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
- Division of Cardiovascular Medicine, Department of Medicine, Solna, Karolinska Institute, Sweden
| | - Per-Olof Berggren
- Department of Molecular Medicine and Surgery, The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institute, Stockholm, Sweden
| | - Anna Widegren
- Department of Chemistry-BMC, Analytical Chemistry and Neurochemistry, Uppsala University, Uppsala, Sweden
| | - Jonas Bergquist
- Department of Chemistry-BMC, Analytical Chemistry and Neurochemistry, Uppsala University, Uppsala, Sweden
| | - Tamara Tchkonia
- Muscle Biology Program, Viron Molecular Medicine Institute, Boston, Massachusetts, USA
| | - James L Kirkland
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Division of General Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Lars Larsson
- Basic and Clinical Muscle Biology, Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
- Center for Molecular Medicine, Karolinska Institute, Stockholm, Sweden
- Muscle Biology Program, Viron Molecular Medicine Institute, Boston, Massachusetts, USA
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Liu X, Xu L, Song Y, Zhao Z, Li X, Wong CY, Chen R, Feng J, Gou Y, Qi Y, Chow HM, Yao S, Wang Y, Gao S, Liu X, Duan L. Force-induced tail-autotomy mitochondrial fission and biogenesis of matrix-excluded mitochondrial-derived vesicles for quality control. Proc Natl Acad Sci U S A 2024; 121:e2217019121. [PMID: 38547062 PMCID: PMC10998583 DOI: 10.1073/pnas.2217019121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 02/26/2024] [Indexed: 04/02/2024] Open
Abstract
Mitochondria constantly fuse and divide for mitochondrial inheritance and functions. Here, we identified a distinct type of naturally occurring fission, tail-autotomy fission, wherein a tail-like thin tubule protrudes from the mitochondrial body and disconnects, resembling autotomy. Next, utilizing an optogenetic mitochondria-specific mechanostimulator, we revealed that mechanical tensile force drives tail-autotomy fission. This force-induced fission involves DRP1/MFF and endoplasmic reticulum tubule wrapping. It redistributes mitochondrial DNA, producing mitochondrial fragments with or without mitochondrial DNA for different fates. Moreover, tensile force can decouple outer and inner mitochondrial membranes, pulling out matrix-excluded tubule segments. Subsequent tail-autotomy fission separates the matrix-excluded tubule segments into matrix-excluded mitochondrial-derived vesicles (MDVs) which recruit Parkin and LC3B, indicating the unique role of tail-autotomy fission in segregating only outer membrane components for mitophagy. Sustained force promotes fission and MDV biogenesis more effectively than transient one. Our results uncover a mechanistically and functionally distinct type of fission and unveil the role of tensile forces in modulating fission and MDV biogenesis for quality control, underscoring the heterogeneity of fission and mechanoregulation of mitochondrial dynamics.
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Affiliation(s)
- Xiaoying Liu
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Linyu Xu
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Yutong Song
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Zhihao Zhao
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Xinyu Li
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Cheuk-Yiu Wong
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Rong Chen
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR999077, China
| | - Jianxiong Feng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou510060, China
| | - Yitao Gou
- Department of Physics, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Yajing Qi
- Department of Physics, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Hei-Man Chow
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong SAR999077, China
- Gerald Choa Neuroscience Institute, The Chinese University of Hong Kong, Hong Kong SAR999077, China
- Nexus of Rare Neurodegenerative Diseases, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Shuhuai Yao
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR999077, China
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR999077, China
| | - Yi Wang
- Department of Physics, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Song Gao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou510060, China
| | - Xingguo Liu
- Chinese Academy of Sciences Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, Chinese University of Hong Kong-Guangzhou Institutes of Biomedicine and Health (CUHK-GIBH) Joint Research Laboratory on Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou510000, China
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science & Innovation, Chinese Academy of Sciences, Hong Kong SAR999077, China
| | - Liting Duan
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR999077, China
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3
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Zhang J, Feng J, Jia J, Wang X, Zhou J, Liu L. Research progress on the pathogenesis and treatment of ventilator-induced diaphragm dysfunction. Heliyon 2023; 9:e22317. [PMID: 38053869 PMCID: PMC10694316 DOI: 10.1016/j.heliyon.2023.e22317] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 12/07/2023] Open
Abstract
Prolonged controlled mechanical ventilation (CMV) can cause diaphragm fiber atrophy and inspiratory muscle weakness, resulting in diaphragmatic contractile dysfunction, called ventilator-induced diaphragm dysfunction (VIDD). VIDD is associated with higher rates of in-hospital deaths, nosocomial pneumonia, difficulty weaning from ventilators, and increased costs. Currently, appropriate clinical strategies to prevent and treat VIDD are unavailable, necessitating the importance of exploring the mechanisms of VIDD and suitable treatment options to reduce the healthcare burden. Numerous animal studies have demonstrated that ventilator-induced diaphragm dysfunction is associated with oxidative stress, increased protein hydrolysis, disuse atrophy, and calcium ion disorders. Therefore, this article summarizes the molecular pathogenesis and treatment of ventilator-induced diaphragm dysfunction in recent years so that it can be better served clinically and is essential to reduce the duration of mechanical ventilation use, intensive care unit (ICU) length of stay, and the medical burden.
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Affiliation(s)
- Jumei Zhang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, 646000, China
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Southwest Medical University, Luzhou, Sichuan Province, 646000, China
| | - Jianguo Feng
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Southwest Medical University, Luzhou, Sichuan Province, 646000, China
| | - Jing Jia
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Southwest Medical University, Luzhou, Sichuan Province, 646000, China
| | - Xiaobin Wang
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, 646000, China
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Southwest Medical University, Luzhou, Sichuan Province, 646000, China
| | - Jun Zhou
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, 646000, China
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Southwest Medical University, Luzhou, Sichuan Province, 646000, China
| | - Li Liu
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, 646000, China
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Southwest Medical University, Luzhou, Sichuan Province, 646000, China
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Dridi H, Yehya M, Barsotti R, Liu Y, Reiken S, Azria L, Yuan Q, Bahlouli L, Soni RK, Marks AR, Lacampagne A, Matecki S. Aberrant mitochondrial dynamics contributes to diaphragmatic weakness induced by mechanical ventilation. PNAS NEXUS 2023; 2:pgad336. [PMID: 37954156 PMCID: PMC10635656 DOI: 10.1093/pnasnexus/pgad336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 10/04/2023] [Indexed: 11/14/2023]
Abstract
In critical care patients, the ""temporary inactivity of the diaphragm caused by mechanical ventilation (MV) triggers a series of events leading to diaphragmatic dysfunction and atrophy, commonly known as ventilator-induced diaphragm dysfunction (VIDD). While mitochondrial dysfunction related to oxidative stress is recognized as a crucial factor in VIDD, the exact molecular mechanism remains poorly understood. In this study, we observe that 6 h of MV triggers aberrant mitochondrial dynamics, resulting in a reduction in mitochondrial size and interaction, associated with increased expression of dynamin-related protein 1 (DRP1). This effect can be prevented by P110, a molecule that inhibits the recruitment of DRP1 to the mitochondrial membrane. Furthermore, isolated mitochondria from the diaphragms of ventilated patients exhibited increased production of reactive oxygen species (ROS). These mitochondrial changes were associated with the rapid oxidation of type 1 ryanodine receptor (RyR1) and a decrease in the stabilizing subunit calstabin 1. Subsequently, we observed that the sarcoplasmic reticulum (SR) in the ventilated diaphragms showed increased calcium leakage and reduced contractile function. Importantly, the mitochondrial fission inhibitor P110 effectively prevented all of these alterations. Taken together, the results of our study illustrate that MV leads, in the diaphragm, to both mitochondrial fragmentation and dysfunction, linked to the up-/down-regulation of 320 proteins, as assessed through global comprehensive quantitative proteomics analysis, primarily associated with mitochondrial function. These outcomes underscore the significance of developing compounds aimed at modulating the balance between mitochondrial fission and fusion as potential interventions to mitigate VIDD in human patients.
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Affiliation(s)
- Haikel Dridi
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, NewYork, NY 10032, USA
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, NewYork, NY 10032, USA
| | - Marc Yehya
- PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier 34000, France
| | - Robert Barsotti
- Department of Biomedical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, PA 19131, USA
| | - Yang Liu
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, NewYork, NY 10032, USA
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, NewYork, NY 10032, USA
| | - Steven Reiken
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, NewYork, NY 10032, USA
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, NewYork, NY 10032, USA
| | - Lan Azria
- PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier 34000, France
| | - Qi Yuan
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, NewYork, NY 10032, USA
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, NewYork, NY 10032, USA
| | - Laith Bahlouli
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, NewYork, NY 10032, USA
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, NewYork, NY 10032, USA
| | - Rajesh Kumar Soni
- Proteomics and Macromolecular Crystallography Shared Resource, Herbert Irving Comprehensive Cancer Center, NewYork, NY 10032, USA
| | - Andrew R Marks
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, NewYork, NY 10032, USA
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, NewYork, NY 10032, USA
| | - Alain Lacampagne
- PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier 34000, France
| | - Stefan Matecki
- PhyMedExp, INSERM, CNRS, University of Montpellier, Montpellier 34000, France
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5
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Kubat GB, Bouhamida E, Ulger O, Turkel I, Pedriali G, Ramaccini D, Ekinci O, Ozerklig B, Atalay O, Patergnani S, Nur Sahin B, Morciano G, Tuncer M, Tremoli E, Pinton P. Mitochondrial dysfunction and skeletal muscle atrophy: Causes, mechanisms, and treatment strategies. Mitochondrion 2023; 72:33-58. [PMID: 37451353 DOI: 10.1016/j.mito.2023.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 07/02/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Skeletal muscle, which accounts for approximately 40% of total body weight, is one of the most dynamic and plastic tissues in the human body and plays a vital role in movement, posture and force production. More than just a component of the locomotor system, skeletal muscle functions as an endocrine organ capable of producing and secreting hundreds of bioactive molecules. Therefore, maintaining healthy skeletal muscles is crucial for supporting overall body health. Various pathological conditions, such as prolonged immobilization, cachexia, aging, drug-induced toxicity, and cardiovascular diseases (CVDs), can disrupt the balance between muscle protein synthesis and degradation, leading to skeletal muscle atrophy. Mitochondrial dysfunction is a major contributing mechanism to skeletal muscle atrophy, as it plays crucial roles in various biological processes, including energy production, metabolic flexibility, maintenance of redox homeostasis, and regulation of apoptosis. In this review, we critically examine recent knowledge regarding the causes of muscle atrophy (disuse, cachexia, aging, etc.) and its contribution to CVDs. Additionally, we highlight the mitochondrial signaling pathways involvement to skeletal muscle atrophy, such as the ubiquitin-proteasome system, autophagy and mitophagy, mitochondrial fission-fusion, and mitochondrial biogenesis. Furthermore, we discuss current strategies, including exercise, mitochondria-targeted antioxidants, in vivo transfection of PGC-1α, and the potential use of mitochondrial transplantation as a possible therapeutic approach.
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Affiliation(s)
- Gokhan Burcin Kubat
- Department of Mitochondria and Cellular Research, Gulhane Health Sciences Institute, University of Health Sciences, 06010 Ankara, Turkey.
| | - Esmaa Bouhamida
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Oner Ulger
- Department of Mitochondria and Cellular Research, Gulhane Health Sciences Institute, University of Health Sciences, 06010 Ankara, Turkey
| | - Ibrahim Turkel
- Department of Exercise and Sport Sciences, Faculty of Sport Sciences, Hacettepe University, 06800 Ankara, Turkey
| | - Gaia Pedriali
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Daniela Ramaccini
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Ozgur Ekinci
- Department of Pathology, Gazi University, 06500 Ankara, Turkey
| | - Berkay Ozerklig
- Department of Exercise and Sport Sciences, Faculty of Sport Sciences, Hacettepe University, 06800 Ankara, Turkey
| | - Ozbeyen Atalay
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
| | - Simone Patergnani
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121 Ferrara, Italy
| | - Beyza Nur Sahin
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
| | - Giampaolo Morciano
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121 Ferrara, Italy
| | - Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
| | - Elena Tremoli
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Paolo Pinton
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121 Ferrara, Italy.
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6
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Mankowski RT, Wohlgemuth SE, Bresciani G, Martin AD, Arnaoutakis G, Martin T, Jeng E, Ferreira L, Machuca T, Rackauskas M, Smuder AJ, Beaver T, Leeuwenburgh C, Smith BK. Intraoperative Hemi-Diaphragm Electrical Stimulation Demonstrates Attenuated Mitochondrial Function without Change in Oxidative Stress in Cardiothoracic Surgery Patients. Antioxidants (Basel) 2023; 12:antiox12051009. [PMID: 37237876 DOI: 10.3390/antiox12051009] [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: 02/17/2023] [Revised: 04/07/2023] [Accepted: 04/24/2023] [Indexed: 05/28/2023] Open
Abstract
Mechanical ventilation during cardiothoracic surgery is life-saving but can lead to ventilator-induced diaphragm dysfunction (VIDD) and prolong ventilator weaning and hospital length of stay. Intraoperative phrenic nerve stimulation may preserve diaphragm force production to offset VIDD; we also investigated changes in mitochondrial function after stimulation. During cardiothoracic surgeries (n = 21), supramaximal, unilateral phrenic nerve stimulation was performed every 30 min for 1 min. Diaphragm biopsies were collected after the last stimulation and analyzed for mitochondrial respiration in permeabilized fibers and protein expression and enzymatic activity of biomarkers of oxidative stress and mitophagy. Patients received, on average, 6.2 ± 1.9 stimulation bouts. Stimulated hemidiaphragms showed lower leak respiration, maximum electron transport system (ETS) capacities, oxidative phosphorylation (OXPHOS), and spare capacity compared with unstimulated sides. There were no significant differences between mitochondrial enzyme activities and oxidative stress and mitophagy protein expression levels. Intraoperative phrenic nerve electrical stimulation led to an acute decrease of mitochondrial respiration in the stimulated hemidiaphragm, without differences in biomarkers of mitophagy or oxidative stress. Future studies warrant investigating optimal stimulation doses and testing post-operative chronic stimulation effects on weaning from the ventilator and rehabilitation outcomes.
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Affiliation(s)
- Robert T Mankowski
- Department of Physiology and Aging, University of Florida, Gainesville, FL 32611, USA
| | | | - Guilherme Bresciani
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA
| | - A Daniel Martin
- Department of Physical Therapy, University of Florida, Gainesville, FL 32611, USA
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - George Arnaoutakis
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Tomas Martin
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Eric Jeng
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Leonardo Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA
| | - Tiago Machuca
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | | | - Ashley J Smuder
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA
| | - Thomas Beaver
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | | | - Barbara K Smith
- Department of Physical Therapy, University of Florida, Gainesville, FL 32611, USA
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Mitochondrial Dysfunction in Intensive Care Unit-Acquired Weakness and Critical Illness Myopathy: A Narrative Review. Int J Mol Sci 2023; 24:ijms24065516. [PMID: 36982590 PMCID: PMC10052131 DOI: 10.3390/ijms24065516] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/03/2023] [Accepted: 03/09/2023] [Indexed: 03/16/2023] Open
Abstract
Mitochondria are key structures providing most of the energy needed to maintain homeostasis. They are the main source of adenosine triphosphate (ATP), participate in glucose, lipid and amino acid metabolism, store calcium and are integral components in various intracellular signaling cascades. However, due to their crucial role in cellular integrity, mitochondrial damage and dysregulation in the context of critical illness can severely impair organ function, leading to energetic crisis and organ failure. Skeletal muscle tissue is rich in mitochondria and, therefore, particularly vulnerable to mitochondrial dysfunction. Intensive care unit-acquired weakness (ICUAW) and critical illness myopathy (CIM) are phenomena of generalized weakness and atrophying skeletal muscle wasting, including preferential myosin breakdown in critical illness, which has also been linked to mitochondrial failure. Hence, imbalanced mitochondrial dynamics, dysregulation of the respiratory chain complexes, alterations in gene expression, disturbed signal transduction as well as impaired nutrient utilization have been proposed as underlying mechanisms. This narrative review aims to highlight the current known molecular mechanisms immanent in mitochondrial dysfunction of patients suffering from ICUAW and CIM, as well as to discuss possible implications for muscle phenotype, function and therapeutic approaches.
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Ribeiro F, Alves PKN, Bechara LRG, Ferreira JCB, Labeit S, Moriscot AS. Small-Molecule Inhibition of MuRF1 Prevents Early Disuse-Induced Diaphragmatic Dysfunction and Atrophy. Int J Mol Sci 2023; 24:ijms24043637. [PMID: 36835047 PMCID: PMC9965746 DOI: 10.3390/ijms24043637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
In clinical conditions such as diaphragm paralysis or mechanical ventilation, disuse-induced diaphragmatic dysfunction (DIDD) is a condition that poses a threat to life. MuRF1 is a key E3-ligase involved in regulating skeletal muscle mass, function, and metabolism, which contributes to the onset of DIDD. We investigated if the small-molecule mediated inhibition of MuRF1 activity (MyoMed-205) protects against early DIDD after 12 h of unilateral diaphragm denervation. Wistar rats were used in this study to determine the compound's acute toxicity and optimal dosage. For potential DIDD treatment efficacy, diaphragm contractile function and fiber cross-sectional area (CSA) were evaluated. Western blotting investigated potential mechanisms underlying MyoMed-205's effects in early DIDD. Our results indicate 50 mg/kg bw MyoMed-205 as a suitable dosage to prevent early diaphragmatic contractile dysfunction and atrophy following 12 h of denervation without detectable signs of acute toxicity. Mechanistically, treatment did not affect disuse-induced oxidative stress (4-HNE) increase, whereas phosphorylation of (ser632) HDAC4 was normalized. MyoMed-205 also mitigated FoxO1 activation, inhibited MuRF2, and increased phospho (ser473) Akt protein levels. These findings may suggest that MuRF1 activity significantly contributes to early DIDD pathophysiology. Novel strategies targeting MuRF1 (e.g., MyoMed-205) have potential therapeutic applications for treating early DIDD.
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Affiliation(s)
- Fernando Ribeiro
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Paula K. N. Alves
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Luiz R. G. Bechara
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Julio C. B. Ferreira
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Siegfried Labeit
- DZHK Partner Site Mannheim-Heidelberg, Medical Faculty Mannheim, University of Heidelberg, 68169 Mannheim, Germany
- Myomedix GmbH, 69151 Neckargemünd, Germany
| | - Anselmo S. Moriscot
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
- Correspondence: ; Tel.: +55-11-3091-0946
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Abstract
The analogy of mitochondria as powerhouses has expired. Mitochondria are living, dynamic, maternally inherited, energy-transforming, biosynthetic, and signaling organelles that actively transduce biological information. We argue that mitochondria are the processor of the cell, and together with the nucleus and other organelles they constitute the mitochondrial information processing system (MIPS). In a three-step process, mitochondria (1) sense and respond to both endogenous and environmental inputs through morphological and functional remodeling; (2) integrate information through dynamic, network-based physical interactions and diffusion mechanisms; and (3) produce output signals that tune the functions of other organelles and systemically regulate physiology. This input-to-output transformation allows mitochondria to transduce metabolic, biochemical, neuroendocrine, and other local or systemic signals that enhance organismal adaptation. An explicit focus on mitochondrial signal transduction emphasizes the role of communication in mitochondrial biology. This framework also opens new avenues to understand how mitochondria mediate inter-organ processes underlying human health.
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Affiliation(s)
- Martin Picard
- Department of Psychiatry, Division of Behavioral Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA; Department of Neurology, H. Houston Merritt Center, Columbia Translational Neuroscience Initiative, Columbia University Irving Medical Center, New York, NY 10032, USA; New York State Psychiatric Institute, New York, NY 10032, USA.
| | - Orian S Shirihai
- Department of Medicine, Endocrinology, and Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA; Metabolism Theme, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
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10
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Barzegari A, Aaboulhassanzadeh S, Landon R, Gueguen V, Meddahi-Pellé A, Parvizpour S, Anagnostou F, Pavon-Djavid G. Mitohormesis and mitochondrial dynamics in the regulation of stem cell fate. J Cell Physiol 2022; 237:3435-3448. [PMID: 35775725 DOI: 10.1002/jcp.30820] [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: 11/28/2021] [Revised: 06/09/2022] [Accepted: 06/13/2022] [Indexed: 11/11/2022]
Abstract
The ability of stem cells for self-renewing, differentiation, and regeneration of injured tissues is believed to occur via the hormetic modulation of nuclear/mitochondrial signal transductions. The evidence now indicates that in damaged tissues, the mitochondria set off the alarm under oxidative stress conditions, hence they are the central regulators of stem cell fate decisions. This review aimed to provide an update to a broader concept of stem cell fate in stress conditions of damaged tissues, and insights for the mitochondrial hormesis (mitohormesis), including the integrated stress response (ISR), mitochondrial dynamics, mitochondria uncoupling, unfolded protein response, and mitokines, with implications for the control of stem cells programing in a successful clinical cell therapy.
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Affiliation(s)
- Abolfazl Barzegari
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sobhan Aaboulhassanzadeh
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Rebecca Landon
- CNRS UMR7052-INSERM U1271, Laboratory of Osteoarticular Biology, Bioengineering and Bioimaging, Paris Diderot University, Paris, France
| | - Virginie Gueguen
- Université Sorbonne Paris Nord, INSERM U1148, Laboratory for Vascular Translational Science, Cardiovascular Bioengineering, Villetaneuse, France
| | - Anne Meddahi-Pellé
- Université Sorbonne Paris Nord, INSERM U1148, Laboratory for Vascular Translational Science, Cardiovascular Bioengineering, Villetaneuse, France
| | - Sepideh Parvizpour
- Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fani Anagnostou
- CNRS UMR7052-INSERM U1271, Laboratory of Osteoarticular Biology, Bioengineering and Bioimaging, Paris Diderot University, Paris, France
| | - Graciela Pavon-Djavid
- Université Sorbonne Paris Nord, INSERM U1148, Laboratory for Vascular Translational Science, Cardiovascular Bioengineering, Villetaneuse, France
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11
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Prolonged Mechanical Ventilation: Outcomes and Management. J Clin Med 2022; 11:jcm11092451. [PMID: 35566577 PMCID: PMC9103623 DOI: 10.3390/jcm11092451] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/23/2022] [Accepted: 04/24/2022] [Indexed: 02/01/2023] Open
Abstract
The number of patients requiring prolonged mechanical ventilation (PMV) is increasing worldwide, placing a burden on healthcare systems. Therefore, investigating the pathophysiology, risk factors, and treatment for PMV is crucial. Various underlying comorbidities have been associated with PMV. The pathophysiology of PMV includes the presence of an abnormal respiratory drive or ventilator-induced diaphragm dysfunction. Numerous studies have demonstrated that ventilator-induced diaphragm dysfunction is related to increases in in-hospital deaths, nosocomial pneumonia, oxidative stress, lung tissue hypoxia, ventilator dependence, and costs. Thus far, the pathophysiologic evidence for PMV has been derived from clinical human studies and experimental studies in animals. Moreover, recent studies have demonstrated the outcome benefits of pharmacological agents and rehabilitative programs for patients requiring PMV. However, methodological limitations affected these studies. Controlled prospective studies with an adequate number of participants are necessary to provide evidence of the mechanism, prognosis, and treatment of PMV. The great epidemiologic impact of PMV and the potential development of treatment make this a key research field.
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12
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Nakano D, Machida S. Mitochondrial fusion- and fission-related protein expression in the regulation of skeletal muscle mass. Physiol Rep 2022; 10:e15281. [PMID: 35439362 PMCID: PMC9017976 DOI: 10.14814/phy2.15281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 03/01/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023] Open
Abstract
Mitochondria in the skeletal muscle are essential for maintaining metabolic plasticity and function. Mitochondrial quality control encompasses the dynamics of the biogenesis and remodeling of mitochondria, characterized by the constant fission and fusion of mitochondria in response to metabolic stressors. However, the roles of mitochondrial fission or fusion in muscle hypertrophy and atrophy remain unclear. The aim of this study was to determine whether mitochondrial fusion and fission events are influenced by muscle hypertrophy or atrophy stimulation. Twenty-six male F344 rats were randomly assigned to a control group or were subjected to up to 14 days of either plantaris overload (via tenotomy of the gastrocnemius and soleus muscles; hypertrophy group) or hindlimb cast immobilization (atrophy group). After 14 days of treatment, plantaris muscle samples were collected to determine the expression levels of mitochondrial fusion- and fission-related proteins. Muscle weight and total muscle protein content increased following plantaris overload in the hypertrophy group, but decreased following immobilization for 14 days in the atrophy group. In the hypertrophied muscle, the level of activated dynamin-related protein 1 (Drp1), phosphorylated at Ser616, significantly increased by 25.8% (p = 0.014). Moreover, the protein expression level of mitochondrial fission factor significantly decreased by 36.5% in the hypertrophy group compared with that of the control group (p = 0.017). In contrast, total Drp1 level significantly decreased in the atrophied plantaris muscle (p = 0.011). Our data suggest that mitochondrial fission events may be influenced by both muscle hypertrophy and atrophy stimulation, and that mitochondrial fission- related protein Drp1 plays an important role in the regulation of skeletal muscle in response to mechanical stimulation.
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Affiliation(s)
- Daiki Nakano
- Ritsumeikan UniversityKusatsuJapan
- Graduate School of Health and Sports ScienceJuntendo UniversityInzaiJapan
| | - Shuichi Machida
- Graduate School of Health and Sports ScienceJuntendo UniversityInzaiJapan
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13
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Slavin MB, Memme JM, Oliveira AN, Moradi N, Hood DA. Regulatory networks controlling mitochondrial quality control in skeletal muscle. Am J Physiol Cell Physiol 2022; 322:C913-C926. [PMID: 35353634 DOI: 10.1152/ajpcell.00065.2022] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The adaptive plasticity of mitochondria within skeletal muscle is regulated by signals converging on a myriad of regulatory networks that operate during conditions of increased (i.e. exercise) and decreased (inactivity, disuse) energy requirements. Notably, some of the initial signals that induce adaptive responses are common to both conditions, differing in their magnitude and temporal pattern, to produce vastly opposing mitochondrial phenotypes. In response to exercise, signaling to PGC-1α and other regulators ultimately produces an abundance of high quality mitochondria, leading to reduced mitophagy and a higher mitochondrial content. This is accompanied by the presence of an enhanced protein quality control system that consists of the protein import machinery as well chaperones and proteases termed the UPRmt. The UPRmt monitors intra-organelle proteostasis, and strives to maintain a mito-nuclear balance between nuclear- and mtDNA-derived gene products via retrograde signaling from the organelle to the nucleus. In addition, antioxidant capacity is improved, affording greater protection against oxidative stress. In contrast, chronic disuse conditions produce similar signaling but result in decrements in mitochondrial quality and content. Thus, the interactive cross-talk of the regulatory networks that control organelle turnover during wide variations in muscle use and disuse remain incompletely understood, despite our improving knowledge of the traditional regulators of organelle content and function. This brief review acknowledges existing regulatory networks and summarizes recent discoveries of novel biological pathways involved in determining organelle biogenesis, dynamics, mitophagy, protein quality control and antioxidant capacity, identifying ample protein targets for therapeutic intervention that determine muscle and mitochondrial health.
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Affiliation(s)
- Mikhaela B Slavin
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.,School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Jonathan M Memme
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.,School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Ashley N Oliveira
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.,School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - Neushaw Moradi
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.,School of Kinesiology and Health Science, York University, Toronto, ON, Canada
| | - David A Hood
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.,School of Kinesiology and Health Science, York University, Toronto, ON, Canada
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14
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Li LF, Yu CC, Wu HP, Chu CM, Huang CY, Liu PC, Liu YY. Reduction in Ventilation-Induced Diaphragmatic Mitochondrial Injury through Hypoxia-Inducible Factor 1α in a Murine Endotoxemia Model. Int J Mol Sci 2022; 23:ijms23031083. [PMID: 35163007 PMCID: PMC8835058 DOI: 10.3390/ijms23031083] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/18/2022] [Accepted: 01/18/2022] [Indexed: 11/16/2022] Open
Abstract
Mechanical ventilation (MV) is essential for patients with sepsis-related respiratory failure but can cause ventilator-induced diaphragm dysfunction (VIDD), which involves diaphragmatic myofiber atrophy and contractile inactivity. Mitochondrial DNA, oxidative stress, mitochondrial dynamics, and biogenesis are associated with VIDD. Hypoxia-inducible factor 1α (HIF-1α) is crucial in the modulation of diaphragm immune responses. The mechanism through which HIF-1α and mitochondria affect sepsis-related diaphragm injury is unknown. We hypothesized that MV with or without endotoxin administration would aggravate diaphragmatic and mitochondrial injuries through HIF-1α. C57BL/6 mice, either wild-type or HIF-1α-deficient, were exposed to MV with or without endotoxemia for 8 h. MV with endotoxemia augmented VIDD and mitochondrial damage, which presented as increased oxidative loads, dynamin-related protein 1 level, mitochondrial DNA level, and the expressions of HIF-1α and light chain 3-II. Furthermore, disarrayed myofibrils; disorganized mitochondria; increased autophagosome numbers; and substantially decreased diaphragm contractility, electron transport chain activities, mitofusin 2, mitochondrial transcription factor A, peroxisome proliferator activated receptor-g coactivator-1α, and prolyl hydroxylase domain 2 were observed (p < 0.05). Endotoxin-stimulated VIDD and mitochondrial injuries were alleviated in HIF-1α-deficient mice (p < 0.05). Our data revealed that endotoxin aggravated MV-induced diaphragmatic dysfunction and mitochondrial damages, partially through the HIF-1α signaling pathway.
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Affiliation(s)
- Li-Fu Li
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chung-Chieh Yu
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Respiratory Therapy, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Huang-Pin Wu
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Respiratory Therapy, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Chien-Ming Chu
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Respiratory Therapy, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Chih-Yu Huang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Ping-Chi Liu
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yung-Yang Liu
- Chest Department, Taipei Veterans General Hospital, Taipei 112201, Taiwan
- School of Medicine, Faculty of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Institute of Clinical Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Correspondence: ; Tel.: 886-2-28712121 (ext. 3071); Fax: 886-2-28757858
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15
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Acute RyR1 Ca 2+ leak enhances NADH-linked mitochondrial respiratory capacity. Nat Commun 2021; 12:7219. [PMID: 34893614 PMCID: PMC8664928 DOI: 10.1038/s41467-021-27422-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/18/2021] [Indexed: 12/25/2022] Open
Abstract
Sustained ryanodine receptor (RyR) Ca2+ leak is associated with pathological conditions such as heart failure or skeletal muscle weakness. We report that a single session of sprint interval training (SIT), but not of moderate intensity continuous training (MICT), triggers RyR1 protein oxidation and nitrosylation leading to calstabin1 dissociation in healthy human muscle and in in vitro SIT models (simulated SIT or S-SIT). This is accompanied by decreased sarcoplasmic reticulum Ca2+ content, increased levels of mitochondrial oxidative phosphorylation proteins, supercomplex formation and enhanced NADH-linked mitochondrial respiratory capacity. Mechanistically, (S-)SIT increases mitochondrial Ca2+ uptake in mouse myotubes and muscle fibres, and decreases pyruvate dehydrogenase phosphorylation in human muscle and mouse myotubes. Countering Ca2+ leak or preventing mitochondrial Ca2+ uptake blunts S-SIT-induced adaptations, a result supported by proteomic analyses. Here we show that triggering acute transient Ca2+ leak through RyR1 in healthy muscle may contribute to the multiple health promoting benefits of exercise.
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16
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The Role of Interaction between Mitochondria and the Extracellular Matrix in the Development of Idiopathic Pulmonary Fibrosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:9932442. [PMID: 34707784 PMCID: PMC8545566 DOI: 10.1155/2021/9932442] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 08/30/2021] [Accepted: 09/13/2021] [Indexed: 01/16/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a condition which affects mainly older adults, that suggests mitochondrial dysfunction and oxidative stress, which follow cells senescence, and might contribute to the disease onset. We have assumed pathogenesis associated with crosstalk between the extracellular matrix (ECM) and mitochondria, mainly based on mitochondrial equilibrium impairment consisting of (1) tyrosine kinases and serine-threonine kinase (TKs and ST-Ks) activation via cytokines, (2) mitochondrial electron transport chain dysfunction and in consequence electrons leak with lower ATP synthesis, (3) the activation of latent TGF-β via αVβ6 integrin, (4) tensions transduction via α2β1 integrin, (5) inefficient mitophagy, and (6) stress inhibited biogenesis. Mitochondria dysfunction influences ECM composition and vice versa. Damaged mitochondria release mitochondrial reactive oxygen species (mtROS) and the mitochondrial DNA (mtDNA) to the microenvironment. Therefore, airway epithelial cells (AECs) undergo transition and secrete cytokines. Described factors initiate an inflammatory process with immunological enhancement. In consequence, local fibroblasts exposed to harmful conditions transform into myofibroblasts, produce ECM, and induce progression of fibrosis. In our review, we summarize numerous aspects of mitochondrial pathobiology, which seem to be involved in the pathogenesis of lung fibrosis. In addition, an increasing body of evidence suggests considering crosstalk between the ECM and mitochondria in this context. Moreover, mitochondria and ECM seem to be important players in the antifibrotic treatment of IPF.
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17
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Yong H, Zhou Y, Ye W, Li T, Wu G, Chen J, Liu L, Wei J. PINK1/Parkin-mediated mitophagy in mechanical ventilation-induced diaphragmatic dysfunction. Ther Adv Respir Dis 2021; 15:1753466621998246. [PMID: 34425730 PMCID: PMC8388225 DOI: 10.1177/1753466621998246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background: Mechanical ventilation (MV) often leads to ventilation-induced diaphragm dysfunction (VIDD). Although the development of this disorder had been linked to oxidative stress, mitochondrial energy deficiency, autophagy activation, and apoptosis in the diaphragm, it remains unclear whether the activation of mitophagy can induce VIDD. With our research, our endeavor is to uncover whether PTEN-induced putative kinase 1 (PINK1)/Parkin-mediated mitophagy affects the MV-caused diaphragmatic dysfunction Methods: Sprague-Dawley rats were subjected to MV treatment for 6 h (MV-6h), 12 h (MV-12h), or 24 h (MV-24h). Post MV, the diaphragm muscle compound action potential (CMAP) and cross-sectional areas (CSAs) of the diaphragm of these rats were measured. The levels of proteins of interest were examined to assess muscle health, mitochondrial dynamics, and mitophagy in the diaphragm. The co-localization of PINK1 with the mitochondrial protein marker tom20 was examined, as well as transmission electron microscopy analysis to detect changes in diaphragm mitochondrial ultrastructure. Results: MV-12h and MV-24h treatments resulted in a decrease in CSA of diaphragm and CMAP amplitude. In addition, the expressions of F-box (MFAbx), muscle-specific ring finger 1 (MURF1), PINK1, and p62 were elevated in rats treated with MV for 12 h and 24 h, while mfn2 expression was reduced. Rats following MV-24h treatment displayed an increase in mitochondrial dynamic protein (Drp1) and Parkin expression and microtubule-associated protein 1 light chain 3/1 (LC3II/I) ratio. Moreover, decreased SOD and GSH activity and membrane potential were observed after MV-12h and MV-24h treatment, while H2O2 activity increased after MV-24h treatment. In addition, a strong co-localization between PINK1 and tom20 was identified. Conclusion: These results reveal that MV leads to various changes in mitochondrial dynamics and significantly increases the mitophagy levels, which subsequently cause the variation in diaphragmatic function and muscle atrophy, indicating that mitophagy could be one of the possible mechanisms by which MV induces diaphragmatic dysfunction. The reviews of this paper are available via the supplemental material section.
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Affiliation(s)
- Hui Yong
- Department of Anesthesiology, The First Affiliated Hospital of Southwest Medical University, Luzhou, P. R. China
| | - Yun Zhou
- Department of Anesthesiology, The First Affiliated Hospital of Southwest Medical University, Luzhou, P. R. China
| | - Wanlin Ye
- Department of Anesthesiology, The First Affiliated Hospital of Southwest Medical University, Luzhou, P. R. China
| | - Tianmei Li
- Department of Anesthesiology, The First Affiliated Hospital of Southwest Medical University, Luzhou, P. R. China
| | - Gangming Wu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China
| | - Jingyuan Chen
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China
| | | | - Jicheng Wei
- Department of Anesthesiology, The First Affiliated Hospital of Southwest Medical University, Luzhou, P. R. China
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18
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Splitting up to heal: mitochondrial shape regulates signaling for focal membrane repair. Biochem Soc Trans 2021; 48:1995-2002. [PMID: 32985660 DOI: 10.1042/bst20200120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/01/2020] [Accepted: 09/07/2020] [Indexed: 12/19/2022]
Abstract
Mitochondria are central to the health of eukaryotic cells. While commonly known for their bioenergetic role, mitochondria also function as signaling organelles that regulate cell stress responses capable of restoring homeostasis or leading the stressed cell to eventual death. Damage to the plasma membrane is a potentially fatal stressor incurred by all cells. Repairing plasma membrane damage requires cells to mount a rapid and localized response to injury. Accumulating evidence has identified a role for mitochondria as an important facilitator of this acute and localized repair response. However, as mitochondria are organized in a cell-wide, interconnected network, it is unclear how they collectively sense and respond to a focal injury. Here we will discuss how mitochondrial shape change is an integral part of this localized repair response. Mitochondrial fragmentation spatially restricts beneficial repair signaling, enabling a localized response to focal injury. Conservation of mitochondrial fragmentation in response to cell and tissue damage across species demonstrates that this is a universal pro-survival adaptation to injury and suggests that mitochondrial fragmentation may provide cells a mechanism to facilitate localized signaling in contexts beyond repairing plasma membrane injury.
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19
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Michelucci A, Liang C, Protasi F, Dirksen RT. Altered Ca 2+ Handling and Oxidative Stress Underlie Mitochondrial Damage and Skeletal Muscle Dysfunction in Aging and Disease. Metabolites 2021; 11:metabo11070424. [PMID: 34203260 PMCID: PMC8304741 DOI: 10.3390/metabo11070424] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 12/26/2022] Open
Abstract
Skeletal muscle contraction relies on both high-fidelity calcium (Ca2+) signals and robust capacity for adenosine triphosphate (ATP) generation. Ca2+ release units (CRUs) are highly organized junctions between the terminal cisternae of the sarcoplasmic reticulum (SR) and the transverse tubule (T-tubule). CRUs provide the structural framework for rapid elevations in myoplasmic Ca2+ during excitation-contraction (EC) coupling, the process whereby depolarization of the T-tubule membrane triggers SR Ca2+ release through ryanodine receptor-1 (RyR1) channels. Under conditions of local or global depletion of SR Ca2+ stores, store-operated Ca2+ entry (SOCE) provides an additional source of Ca2+ that originates from the extracellular space. In addition to Ca2+, skeletal muscle also requires ATP to both produce force and to replenish SR Ca2+ stores. Mitochondria are the principal intracellular organelles responsible for ATP production via aerobic respiration. This review provides a broad overview of the literature supporting a role for impaired Ca2+ handling, dysfunctional Ca2+-dependent production of reactive oxygen/nitrogen species (ROS/RNS), and structural/functional alterations in CRUs and mitochondria in the loss of muscle mass, reduction in muscle contractility, and increase in muscle damage in sarcopenia and a wide range of muscle disorders including muscular dystrophy, rhabdomyolysis, central core disease, and disuse atrophy. Understanding the impact of these processes on normal muscle function will provide important insights into potential therapeutic targets designed to prevent or reverse muscle dysfunction during aging and disease.
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Affiliation(s)
- Antonio Michelucci
- DNICS, Department of Neuroscience, Imaging, and Clinical Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
- Correspondence:
| | - Chen Liang
- Department of Pharmacology and Physiology, School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, NY 14642, USA; (C.L.); (R.T.D.)
| | - Feliciano Protasi
- CAST, Center for Advanced Studies and Technology, DMSI, Department of Medicine and Aging Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy;
| | - Robert T. Dirksen
- Department of Pharmacology and Physiology, School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, NY 14642, USA; (C.L.); (R.T.D.)
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20
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Preferent Diaphragmatic Involvement in TK2 Deficiency: An Autopsy Case Study. Int J Mol Sci 2021; 22:ijms22115598. [PMID: 34070501 PMCID: PMC8199166 DOI: 10.3390/ijms22115598] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 12/23/2022] Open
Abstract
Our goal was to analyze postmortem tissues of an adult patient with late-onset thymidine kinase 2 (TK2) deficiency who died of respiratory failure. Compared with control tissues, we found a low mtDNA content in the patient’s skeletal muscle, liver, kidney, small intestine, and particularly in the diaphragm, whereas heart and brain tissue showed normal mtDNA levels. mtDNA deletions were present in skeletal muscle and diaphragm. All tissues showed a low content of OXPHOS subunits, and this was especially evident in diaphragm, which also exhibited an abnormal protein profile, expression of non-muscular β-actin and loss of GAPDH and α-actin. MALDI-TOF/TOF mass spectrometry analysis demonstrated the loss of the enzyme fructose-bisphosphate aldolase, and enrichment for serum albumin in the patient’s diaphragm tissue. The TK2-deficient patient’s diaphragm showed a more profound loss of OXPHOS proteins, with lower levels of catalase, peroxiredoxin 6, cytosolic superoxide dismutase, p62 and the catalytic subunits of proteasome than diaphragms of ventilated controls. Strong overexpression of TK1 was observed in all tissues of the patient with diaphragm showing the highest levels. TK2 deficiency induces a more profound dysfunction of the diaphragm than of other tissues, which manifests as loss of OXPHOS and glycolytic proteins, sarcomeric components, antioxidants and overactivation of the TK1 salvage pathway that is not attributed to mechanical ventilation.
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21
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Memme JM, Slavin M, Moradi N, Hood DA. Mitochondrial Bioenergetics and Turnover during Chronic Muscle Disuse. Int J Mol Sci 2021; 22:ijms22105179. [PMID: 34068411 PMCID: PMC8153634 DOI: 10.3390/ijms22105179] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 12/15/2022] Open
Abstract
Periods of muscle disuse promote marked mitochondrial alterations that contribute to the impaired metabolic health and degree of atrophy in the muscle. Thus, understanding the molecular underpinnings of muscle mitochondrial decline with prolonged inactivity is of considerable interest. There are translational applications to patients subjected to limb immobilization following injury, illness-induced bed rest, neuropathies, and even microgravity. Studies in these patients, as well as on various pre-clinical rodent models have elucidated the pathways involved in mitochondrial quality control, such as mitochondrial biogenesis, mitophagy, fission and fusion, and the corresponding mitochondrial derangements that underlie the muscle atrophy that ensues from inactivity. Defective organelles display altered respiratory function concurrent with increased accumulation of reactive oxygen species, which exacerbate myofiber atrophy via degradative pathways. The preservation of muscle quality and function is critical for maintaining mobility throughout the lifespan, and for the prevention of inactivity-related diseases. Exercise training is effective in preserving muscle mass by promoting favourable mitochondrial adaptations that offset the mitochondrial dysfunction, which contributes to the declines in muscle and whole-body metabolic health. This highlights the need for further investigation of the mechanisms in which mitochondria contribute to disuse-induced atrophy, as well as the specific molecular targets that can be exploited therapeutically.
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Affiliation(s)
| | | | | | - David A. Hood
- Correspondence: ; Tel.: +1-(416)-736-2100 (ext. 66640)
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22
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Yoshihara T, Deminice R, Hyatt HW, Ozdemir M, Nguyen BL, Powers SK. Angiotensin 1-7 protects against ventilator-induced diaphragm dysfunction. Clin Transl Sci 2021; 14:1512-1523. [PMID: 33742769 PMCID: PMC8301547 DOI: 10.1111/cts.13015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/29/2021] [Accepted: 02/20/2021] [Indexed: 12/24/2022] Open
Abstract
Mechanical ventilation (MV) is a life‐saving instrument used to provide ventilatory support for critically ill patients and patients undergoing surgery. Unfortunately, an unintended consequence of prolonged MV is the development of inspiratory weakness due to both diaphragmatic atrophy and contractile dysfunction; this syndrome is labeled ventilator‐induced diaphragm dysfunction (VIDD). VIDD is clinically important because diaphragmatic weakness is an important contributor to problems in weaning patients from MV. Investigations into the pathogenesis of VIDD reveal that oxidative stress is essential for the rapid development of VIDD as redox disturbances in diaphragm fibers promote accelerated proteolysis. Currently, no standard treatment exists to prevent VIDD and, therefore, developing a strategy to avert VIDD is vital. Guided by evidence indicating that activation of the classical axis of the renin‐angiotensin system (RAS) in diaphragm fibers promotes oxidative stress and VIDD, we hypothesized that activation of the nonclassical RAS signaling pathway via angiotensin 1‐7 (Ang1‐7) will protect against VIDD. Using an established animal model of prolonged MV, our results disclose that infusion of Ang1‐7 protects the diaphragm against MV‐induced contractile dysfunction and fiber atrophy in both fast and slow muscle fibers. Further, Ang1‐7 shielded diaphragm fibers against MV‐induced mitochondrial damage, oxidative stress, and protease activation. Collectively, these results reveal that treatment with Ang1‐7 protects against VIDD, in part, due to diminishing oxidative stress and protease activation. These important findings provide robust evidence that Ang1‐7 has the therapeutic potential to protect against VIDD by preventing MV‐induced contractile dysfunction and atrophy of both slow and fast muscle fibers.
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Affiliation(s)
- Toshinori Yoshihara
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA.,Graduate School of Health and Sports Science, Juntendo University, Inzai, Japan
| | - Rafael Deminice
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA.,Department of Physical Education, State University of Londrina, Londrina, Brazil
| | - Hayden W Hyatt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Mustafa Ozdemir
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Branden L Nguyen
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| | - Scott K Powers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
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Li LF, Yu CC, Huang HY, Wu HP, Chu CM, Huang CY, Liu PC, Liu YY. Suppression of Hypoxia-Inducible Factor 1α by Low-Molecular-Weight Heparin Mitigates Ventilation-Induced Diaphragm Dysfunction in a Murine Endotoxemia Model. Int J Mol Sci 2021; 22:ijms22041702. [PMID: 33567713 PMCID: PMC7914863 DOI: 10.3390/ijms22041702] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 12/29/2022] Open
Abstract
Mechanical ventilation (MV) is required to maintain life for patients with sepsis-related acute lung injury but can cause diaphragmatic myotrauma with muscle damage and weakness, known as ventilator-induced diaphragm dysfunction (VIDD). Hypoxia-inducible factor 1α (HIF-1α) plays a crucial role in inducing inflammation and apoptosis. Low-molecular-weight heparin (LMWH) was proven to have anti-inflammatory properties. However, HIF-1α and LMWH affect sepsis-related diaphragm injury has not been investigated. We hypothesized that LMWH would reduce endotoxin-augmented VIDD through HIF-1α. C57BL/6 mice, either wild-type or HIF-1α–deficient, were exposed to MV with or without endotoxemia for 8 h. Enoxaparin (4 mg/kg) was administered subcutaneously 30 min before MV. MV with endotoxemia aggravated VIDD, as demonstrated by increased interleukin-6 and macrophage inflammatory protein-2 levels, oxidative loads, and the expression of HIF-1α, calpain, caspase-3, atrogin-1, muscle ring finger-1, and microtubule-associated protein light chain 3-II. Disorganized myofibrils, disrupted mitochondria, increased numbers of autophagic and apoptotic mediators, substantial apoptosis of diaphragm muscle fibers, and decreased diaphragm function were also observed (p < 0.05). Endotoxin-exacerbated VIDD and myonuclear apoptosis were attenuated by pharmacologic inhibition by LMWH and in HIF-1α–deficient mice (p < 0.05). Our data indicate that enoxaparin reduces endotoxin-augmented MV-induced diaphragmatic injury, partially through HIF-1α pathway inhibition.
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Affiliation(s)
- Li-Fu Li
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chung-Chieh Yu
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Respiratory Therapy, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Hung-Yu Huang
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Huang-Pin Wu
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Respiratory Therapy, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Chien-Ming Chu
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Department of Respiratory Therapy, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Chih-Yu Huang
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Ping-Chi Liu
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Keelung 20401, Taiwan; (L.-F.L.); (C.-C.Y.); (H.-Y.H.); (H.-P.W.); (C.-M.C.); (C.-Y.H.); (P.-C.L.)
- Department of Internal Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yung-Yang Liu
- Chest Department, Taipei Veterans General Hospital, Taipei 11217, Taiwan
- Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei 11217, Taiwan
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei 11217, Taiwan
- Correspondence: ; Tel.: +(886)-2-28712121 (ext. 3071); Fax: +(886)-2-28757858
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24
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Hyatt HW, Ozdemir M, Yoshihara T, Nguyen BL, Deminice R, Powers SK. Calpains play an essential role in mechanical ventilation-induced diaphragmatic weakness and mitochondrial dysfunction. Redox Biol 2020; 38:101802. [PMID: 33279868 PMCID: PMC7724197 DOI: 10.1016/j.redox.2020.101802] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/10/2020] [Accepted: 11/13/2020] [Indexed: 02/07/2023] Open
Abstract
Mechanical ventilation (MV) is a life-saving intervention for many critically ill patients. Unfortunately, an unintended consequence of prolonged MV is the rapid development of diaphragmatic atrophy and contractile dysfunction, known as ventilator-induced diaphragm dysfunction (VIDD). Although the mechanism(s) responsible for VIDD are not fully understood, abundant evidence reveals that oxidative stress leading to the activation of the major proteolytic systems (i.e., autophagy, ubiquitin-proteasome, caspase, and calpain) plays a dominant role. Of the proteolytic systems involved in VIDD, calpain has received limited experimental attention due to the longstanding dogma that calpain plays a minor role in inactivity-induced muscle atrophy. Guided by preliminary experiments, we tested the hypothesis that activation of calpains play an essential role in MV-induced oxidative stress and the development of VIDD. This premise was rigorously tested by transgene overexpression of calpastatin, an endogenous inhibitor of calpains. Animals with/without transfection of the calpastatin gene in diaphragm muscle fibers were exposed to 12 h of MV. Results confirmed that overexpression of calpastatin barred MV-induced activation of calpain in diaphragm fibers. Importantly, deterrence of calpain activation protected the diaphragm against MV-induced oxidative stress, fiber atrophy, and contractile dysfunction. Moreover, prevention of calpain activation in the diaphragm forstalled MV-induced mitochondrial dysfunction and prevented MV-induced activation of caspase-3 along with the transcription of muscle specific E3 ligases. Collectively, these results support the hypothesis that calpain activation plays an essential role in the early development of VIDD. Further, these findings provide the first direct evidence that calpain plays an important function in inactivity-induced mitochondrial dysfunction and oxidative stress in skeletal muscle fibers. Inhibiting calpains during mechanical ventilation protects the diaphragm. Calpains play an important role in muscle atrophy and contractile dysfunction. Calpain inhibition during mechanical ventilation prevents mitochondrial dysfunction. Calpain-cleaved molecules may play important signaling roles. Calpain activation cross-talks with other proteolytic systems.
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Affiliation(s)
- Hayden W Hyatt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
| | - Mustafa Ozdemir
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Exercise and Sport Sciences, Hacettepe University, Ankara, Turkey
| | - Toshinori Yoshihara
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Exercise Physiology, Juntendo University, Tokyo, Japan
| | - Branden L Nguyen
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Rafael Deminice
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Physical Education, State University of Londrina, Londrina, Brazil
| | - Scott K Powers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
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25
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Sofela S, Sahloul S, Bhattacharjee S, Bose A, Usman U, Song YA. Quantitative fluorescence imaging of mitochondria in body wall muscles of Caenorhabditis elegans under hyperglycemic conditions using a microfluidic chip. Integr Biol (Camb) 2020; 12:150-160. [DOI: 10.1093/intbio/zyaa011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 03/15/2020] [Accepted: 04/28/2020] [Indexed: 12/25/2022]
Abstract
Abstract
Type 2 diabetes is the most common metabolic disease, and insulin resistance plays a role in the pathogenesis of the disease. Because completely functional mitochondria are necessary to obtain glucose-stimulated insulin from pancreatic beta cells, dysfunction of mitochondrial oxidative pathway could be involved in the development of diabetes. As a simple animal model, Caenorhabditis elegans renders itself to investigate such metabolic mechanisms because it possesses insulin/insulin-like growth factor-1 signaling pathway similar to that in humans. Currently, the widely spread agarose pad-based immobilization technique for fluorescence imaging of the mitochondria in C. elegans is laborious, batchwise, and does not allow for facile handling of the worm. To overcome these technical challenges, we have developed a single-channel microfluidic device that can trap a C. elegans and allow to image the mitochondria in body wall muscles accurately and in higher throughput than the traditional approach. In specific, our microfluidic device took advantage of the proprioception of the worm to rotate its body in a microfluidic channel with an aspect ratio above one to gain more space for its undulation motion that was favorable for quantitative fluorescence imaging of mitochondria in the body wall muscles. Exploiting this unique feature of the microfluidic chip-based immobilization and fluorescence imaging, we observed a significant decrease in the mitochondrial fluorescence intensity under hyperglycemic conditions, whereas the agarose pad-based approach did not show any significant change under the same conditions. A machine learning model trained with these fluorescence images from the microfluidic device could classify healthy and hyperglycemic worms at high accuracy. Given this significant technological advantage, its easiness of use and low cost, our microfluidic imaging chip could become a useful immobilization tool for quantitative fluorescence imaging of the body wall muscles in C. elegans.
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Affiliation(s)
- Samuel Sofela
- Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Tandon School of Engineering, New York University, Brooklyn, NY, USA
| | - Sarah Sahloul
- Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Sukanta Bhattacharjee
- Department of Computer Science and Engineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Ambar Bose
- Kallistos Infotech Private Limited, Kolkata, India
| | - Ushna Usman
- Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Yong-Ak Song
- Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Tandon School of Engineering, New York University, Brooklyn, NY, USA
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26
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Torres MJ, McLaughlin KL, Renegar RH, Valsaraj S, Whitehurst KS, Sharaf OM, Sharma UM, Horton JL, Sarathy B, Parks JC, Brault JJ, Fisher-Wellman KH, Neufer PD, Virag JAI. Intracardiac administration of ephrinA1-Fc preserves mitochondrial bioenergetics during acute ischemia/reperfusion injury. Life Sci 2019; 239:117053. [PMID: 31733316 DOI: 10.1016/j.lfs.2019.117053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/06/2019] [Accepted: 11/08/2019] [Indexed: 12/18/2022]
Abstract
AIMS Intracardiac injection of recombinant EphrinA1-Fc immediately following coronary artery ligation in mice reduces infarct size in both reperfused and non-reperfused myocardium, but the cellular alterations behind this phenomenon remain unknown. MAIN METHODS Herein, 10 wk-old B6129SF2/J male mice were exposed to acute ischemia/reperfusion (30minI/24hrsR) injury immediately followed by intracardiac injection of either EphrinA1-Fc or IgG-Fc. After 24 h of reperfusion, sections of the infarct margin in the left ventricle were imaged via transmission electron microscopy, and mitochondrial function was assessed in both permeabilized fibers and isolated mitochondria, to examine mitochondrial structure, function, and energetics in the early stages of repair. KEY FINDINGS At a structural level, EphrinA1-Fc administration prevented the I/R-induced loss of sarcomere alignment and mitochondrial organization along the Z disks, as well as disorganization of the cristae and loss of inter-mitochondrial junctions. With respect to bioenergetics, loss of respiratory function induced by I/R was prevented by EphrinA1-Fc. Preservation of cardiac bioenergetics was not due to changes in mitochondrial JH2O2 emitting potential, membrane potential, ADP affinity, efficiency of ATP production, or activity of the main dehydrogenase enzymes, suggesting that EphrinA1-Fc indirectly maintains respiratory function via preservation of the mitochondrial network. Moreover, these protective effects were lost in isolated mitochondria, further emphasizing the importance of the intact cardiomyocyte ultrastructure in mitochondrial energetics. SIGNIFICANCE Collectively, these data suggest that intracardiac injection of EphrinA1-Fc protects cardiac function by preserving cardiomyocyte structure and mitochondrial bioenergetics, thus emerging as a potential therapeutic strategy in I/R injury.
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Affiliation(s)
- Maria J Torres
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, 27834, USA
| | - Kelsey L McLaughlin
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, 27834, USA; Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Randall H Renegar
- Dept of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Smrithi Valsaraj
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - K'Shylah S Whitehurst
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Omar M Sharaf
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Uma M Sharma
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Julie L Horton
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, 27834, USA; Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Brinda Sarathy
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Justin C Parks
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Jeffrey J Brault
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA; Dept of Kinesiology, College of Health and Human Performance, East Carolina University, Greenville, NC, 27834, USA
| | - Kelsey H Fisher-Wellman
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, 27834, USA; Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - P Darrell Neufer
- East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, 27834, USA; Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Jitka A I Virag
- Dept of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
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27
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Kitaoka Y, Watanabe D, Nonaka Y, Yagishita K, Kano Y, Hoshino D. Effects of clenbuterol administration on mitochondrial morphology and its regulatory proteins in rat skeletal muscle. Physiol Rep 2019; 7:e14266. [PMID: 31599131 PMCID: PMC6785658 DOI: 10.14814/phy2.14266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/18/2019] [Accepted: 09/20/2019] [Indexed: 12/14/2022] Open
Abstract
Clenbuterol induces a slow-to-fast fiber type transition in skeletal muscle. This muscle fiber transition decreased mitochondrial oxidative capacity and respiratory function. We hypothesized that the clenbuterol-mediated reduction in oxidative capacity is associated with the alteration in mitochondrial morphology. To verify this hypothesis, we examined whether clenbuterol alters mitochondrial morphology and mitochondrial regulatory proteins in rat skeletal muscle. Clenbuterol was administered to rats via drinking water (30 mg/L) for 3 weeks. Myosin heavy chain (MHC) isoform composition, mitochondrial morphology, and fusion and fission regulatory protein levels in deep region and superficial region in tibialis anterior (TA) muscles were assessed. Clenbuterol induced the fiber type transition from slow to fast in both the regions of TA. The levels of optic atrophy protein 1, mitofusin 2, and mitochondrial fission 1, but not of dynamin-related protein 1, significantly decreased in deep and superficial muscles after clenbuterol administration (P < 0.01). Also, observation using the transmission electron microscopy showed a decrease in mitochondrial volume (P < 0.05) and an increase in proportion of continuous or interacting mitochondria across Z-lines (P < 0.05). We showed that clenbuterol administration induces a transition in the muscle fiber type composition toward fast phenotype and causes alterations in mitochondrial morphology with a concomitant decrease in mitochondrial fusion and fission regulatory protein levels. These mitochondrial morphological alterations may influence deleterious effects on skeletal muscle metabolism.
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Affiliation(s)
- Yu Kitaoka
- Department of Human SciencesKanagawa UniversityYokohamaJapan
| | - Daiki Watanabe
- Graduate School of Integrated Arts and SciencesHiroshima UniversityHiroshimaJapan
| | - Yudai Nonaka
- Department of Engineering ScienceThe University of Electro‐communicationsChofuTokyoJapan
| | - Kazuyoshi Yagishita
- Clinical Center for Sports Medicine and Sports DentistryHyperbaric Medical Center/Sports Medicine Clinical CenterMedical Hospital of Tokyo Medical and Dental UniversityBunkyo‐kuTokyoJapan
| | - Yutaka Kano
- Department of Engineering ScienceThe University of Electro‐communicationsChofuTokyoJapan
| | - Daisuke Hoshino
- Department of Engineering ScienceThe University of Electro‐communicationsChofuTokyoJapan
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28
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Mizuno M, Kuno A, Yano T, Miki T, Oshima H, Sato T, Nakata K, Kimura Y, Tanno M, Miura T. Empagliflozin normalizes the size and number of mitochondria and prevents reduction in mitochondrial size after myocardial infarction in diabetic hearts. Physiol Rep 2019; 6:e13741. [PMID: 29932506 PMCID: PMC6014462 DOI: 10.14814/phy2.13741] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 05/23/2018] [Accepted: 05/24/2018] [Indexed: 12/22/2022] Open
Abstract
To explore mechanisms by which SGLT2 inhibitors protect diabetic hearts from heart failure, we examined the effect of empagliflozin (Empa) on the ultrastructure of cardiomyocytes in the noninfarcted region of the diabetic heart after myocardial infarction (MI). OLETF, a rat model of type 2 diabetes, and its nondiabetic control, LETO, received a sham operation or left coronary artery ligation 12 h before tissue sampling. Tissues were sampled from the posterior ventricle (i.e., the remote noninfarcted region in rats with MI). The number of mitochondria was larger and small mitochondria were more prevalent in OLETF than in LETO. Fis1 expression level was higher in OLETF than in LETO, while phospho‐Ser637‐Drp1, total Drp1, Mfn1/2, and OPA1 levels were comparable. MI further reduced the size of mitochondria with increased Drp1‐Ser616 phosphorylation in OLETF. The number of autophagic vacuoles was unchanged after MI in LETO but was decreased in OLETF. Lipid droplets in cardiomyocytes and tissue triglycerides were increased in OLETF. Empa administration (10 mg/kg per day) reduced blood glucose and triglycerides and paradoxically increased lipid droplets in cardiomyocytes in OLETF. Empa suppressed Fis1 upregulation, increased Bnip3 expression, and prevented reduction in both mitochondrial size and autophagic vacuole number after MI in OLETF. Together with the results of our parallel study showing upregulation of SOD2 and catalase by Empa, the results indicate that Empa normalizes the size and number of mitochondria in diabetic hearts and that diabetes‐induced excessive reduction in mitochondrial size after MI was prevented by Empa via suppression of ROS and restoration of autophagy.
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Affiliation(s)
- Masashi Mizuno
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Atsushi Kuno
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.,Department of Pharmacology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Toshiyuki Yano
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takayuki Miki
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Hiroto Oshima
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tatsuya Sato
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.,Department of Cellular Physiology and Signal Transduction, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Kei Nakata
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yukishige Kimura
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Masaya Tanno
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tetsuji Miura
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
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29
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Liu Y, Chen N, Chang C, Lin S, Kao K, Hu H, Chang G, Li L. Ethyl pyruvate attenuates ventilation-induced diaphragm dysfunction through high-mobility group box-1 in a murine endotoxaemia model. J Cell Mol Med 2019; 23:5679-5691. [PMID: 31339670 PMCID: PMC6652995 DOI: 10.1111/jcmm.14478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 04/12/2019] [Accepted: 05/22/2019] [Indexed: 01/05/2023] Open
Abstract
Mechanical ventilation (MV) can save the lives of patients with sepsis. However, MV in both animal and human studies has resulted in ventilator-induced diaphragm dysfunction (VIDD). Sepsis may promote skeletal muscle atrophy in critically ill patients. Elevated high-mobility group box-1 (HMGB1) levels are associated with patients requiring long-term MV. Ethyl pyruvate (EP) has been demonstrated to lengthen survival in patients with severe sepsis. We hypothesized that the administration of HMGB1 inhibitor EP or anti-HMGB1 antibody could attenuate sepsis-exacerbated VIDD by repressing HMGB1 signalling. Male C57BL/6 mice with or without endotoxaemia were exposed to MV (10 mL/kg) for 8 hours after administrating either 100 mg/kg of EP or 100 mg/kg of anti-HMGB1 antibody. Mice exposed to MV with endotoxaemia experienced augmented VIDD, as indicated by elevated proteolytic, apoptotic and autophagic parameters. Additionally, disarrayed myofibrils and disrupted mitochondrial ultrastructures, as well as increased HMGB1 mRNA and protein expression, and plasminogen activator inhibitor-1 protein, oxidative stress, autophagosomes and myonuclear apoptosis were also observed. However, MV suppressed mitochondrial cytochrome C and diaphragm contractility in mice with endotoxaemia (P < 0.05). These deleterious effects were alleviated by pharmacologic inhibition with EP or anti-HMGB1 antibody (P < 0.05). Our data suggest that EP attenuates endotoxin-enhanced VIDD by inhibiting HMGB1 signalling pathway.
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Affiliation(s)
- Yung‐Yang Liu
- Chest DepartmentTaipei Veterans General HospitalTaipeiTaiwan
- Institutes of Clinical MedicineSchool of MedicineNational Yang‐Ming UniversityTaipeiTaiwan
| | - Ning‐Hung Chen
- Department of Internal Medicine, Division of Pulmonary and Critical Care MedicineChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Internal MedicineChang Gung UniversityTaoyuanTaiwan
- Department of Respiratory TherapyChang Gung Memorial HospitalTaoyuanTaiwan
| | - Chih‐Hao Chang
- Department of Internal Medicine, Division of Pulmonary and Critical Care MedicineChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Internal MedicineChang Gung UniversityTaoyuanTaiwan
| | - Shih‐Wei Lin
- Department of Internal Medicine, Division of Pulmonary and Critical Care MedicineChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Internal MedicineChang Gung UniversityTaoyuanTaiwan
- Department of Respiratory TherapyChang Gung Memorial HospitalTaoyuanTaiwan
| | - Kuo‐Chin Kao
- Department of Internal Medicine, Division of Pulmonary and Critical Care MedicineChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Internal MedicineChang Gung UniversityTaoyuanTaiwan
- Department of Respiratory TherapyChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Respiratory Care, College of MedicineChang Gung UniversityTaoyuanTaiwan
| | - Han‐Chung Hu
- Department of Internal Medicine, Division of Pulmonary and Critical Care MedicineChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Internal MedicineChang Gung UniversityTaoyuanTaiwan
- Department of Respiratory TherapyChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Respiratory Care, College of MedicineChang Gung UniversityTaoyuanTaiwan
| | - Gwo‐Jyh Chang
- Graduate Institute of Clinical Medical SciencesChang Gung UniversityTaoyuanTaiwan
| | - Li‐Fu Li
- Department of Internal Medicine, Division of Pulmonary and Critical Care MedicineChang Gung Memorial HospitalTaoyuanTaiwan
- Department of Internal MedicineChang Gung UniversityTaoyuanTaiwan
- Department of Respiratory TherapyChang Gung Memorial HospitalTaoyuanTaiwan
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30
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Peñuelas O, Keough E, López-Rodríguez L, Carriedo D, Gonçalves G, Barreiro E, Lorente JÁ. Ventilator-induced diaphragm dysfunction: translational mechanisms lead to therapeutical alternatives in the critically ill. Intensive Care Med Exp 2019; 7:48. [PMID: 31346802 PMCID: PMC6658639 DOI: 10.1186/s40635-019-0259-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 02/08/2023] Open
Abstract
Mechanical ventilation [MV] is a life-saving technique delivered to critically ill patients incapable of adequately ventilating and/or oxygenating due to respiratory or other disease processes. This necessarily invasive support however could potentially result in important iatrogenic complications. Even brief periods of MV may result in diaphragm weakness [i.e., ventilator-induced diaphragm dysfunction [VIDD]], which may be associated with difficulty weaning from the ventilator as well as mortality. This suggests that VIDD could potentially have a major impact on clinical practice through worse clinical outcomes and healthcare resource use. Recent translational investigations have identified that VIDD is mainly characterized by alterations resulting in a major decline of diaphragmatic contractile force together with atrophy of diaphragm muscle fibers. However, the signaling mechanisms responsible for VIDD have not been fully established. In this paper, we summarize the current understanding of the pathophysiological pathways underlying VIDD and highlight the diagnostic approach, as well as novel and experimental therapeutic options.
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Affiliation(s)
- Oscar Peñuelas
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain. .,Centro de Investigación en Red de Enfermedades Respiratorias [CIBERES], Instituto de Salud Carlos III [ISCIII], Madrid, Spain.
| | - Elena Keough
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Lucía López-Rodríguez
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Demetrio Carriedo
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Gesly Gonçalves
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Esther Barreiro
- Centro de Investigación en Red de Enfermedades Respiratorias [CIBERES], Instituto de Salud Carlos III [ISCIII], Madrid, Spain.,Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department [CEXS], Barcelona, Spain.,Universitat Pompeu Fabra [UPF], Barcelona Biomedical Research Park [PRBB], Barcelona, Spain
| | - José Ángel Lorente
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain.,Centro de Investigación en Red de Enfermedades Respiratorias [CIBERES], Instituto de Salud Carlos III [ISCIII], Madrid, Spain.,Universidad Europea, Madrid, Spain
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31
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Sparc, an EPS-induced gene, modulates the extracellular matrix and mitochondrial function via ILK/AMPK pathways in C2C12 cells. Life Sci 2019; 229:277-287. [DOI: 10.1016/j.lfs.2019.05.070] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 05/24/2019] [Accepted: 05/27/2019] [Indexed: 01/06/2023]
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de Oliveira MV, Rocha NDN, Santos RS, Rocco MRM, de Magalhães RF, Silva JD, Souza SAL, Capelozzi VL, Pelosi P, Silva PL, Rocco PRM. Endotoxin-Induced Emphysema Exacerbation: A Novel Model of Chronic Obstructive Pulmonary Disease Exacerbations Causing Cardiopulmonary Impairment and Diaphragm Dysfunction. Front Physiol 2019; 10:664. [PMID: 31191356 PMCID: PMC6546905 DOI: 10.3389/fphys.2019.00664] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 05/09/2019] [Indexed: 12/26/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a progressive disorder of the lung parenchyma which also involves extrapulmonary manifestations, such as cardiovascular impairment, diaphragm dysfunction, and frequent exacerbations. The development of animal models is important to elucidate the pathophysiology of COPD exacerbations and enable analysis of possible therapeutic approaches. We aimed to characterize a model of acute emphysema exacerbation and evaluate its consequences on the lung, heart, and diaphragm. Twenty-four Wistar rats were randomly assigned into one of two groups: control (C) or emphysema (ELA). In ELA group, animals received four intratracheal instillations of pancreatic porcine elastase (PPE) at 1-week intervals. The C group received saline under the same protocol. Five weeks after the last instillation, C and ELA animals received saline (SAL) or E. coli lipopolysaccharide (LPS) (200 μg in 200 μl) intratracheally. Twenty-four hours after saline or endotoxin administration, arterial blood gases, lung inflammation and morphometry, collagen fiber content, and lung mechanics were analyzed. Echocardiography, diaphragm ultrasonography (US), and computed tomography (CT) of the chest were done. ELA-LPS animals, compared to ELA-SAL, exhibited decreased arterial oxygenation; increases in alveolar collapse (p < 0.0001), relative neutrophil counts (p = 0.007), levels of cytokine-induced neutrophil chemoattractant-1, interleukin (IL)-1β, tumor necrosis factor-α, IL-6, and vascular endothelial growth factor in lung tissue, collagen fiber deposition in alveolar septa, airways, and pulmonary vessel walls, and dynamic lung elastance (p < 0.0001); reduced pulmonary acceleration time/ejection time ratio, (an indirect index of pulmonary arterial hypertension); decreased diaphragm thickening fraction and excursion; and areas of emphysema associated with heterogeneous alveolar opacities on chest CT. In conclusion, we developed a model of endotoxin-induced emphysema exacerbation that affected not only the lungs but also the heart and diaphragm, thus resembling several features of human disease. This model of emphysema should allow preclinical testing of novel therapies with potential for translation into clinical practice.
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Affiliation(s)
- Milena Vasconcellos de Oliveira
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nazareth de Novaes Rocha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil
| | - Raquel Souza Santos
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcella Rieken Macedo Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel Ferreira de Magalhães
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Johnatas Dutra Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sergio Augusto Lopes Souza
- Department of Radiology, Faculty of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vera Luiza Capelozzi
- Department of Pathology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy.,San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia Rieken Macedo Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Liang F, Emeriaud G, Rassier DE, Shang D, Gusev E, Hussain SNA, Sage M, Crulli B, Fortin-Pellerin E, Praud JP, Petrof BJ. Mechanical ventilation causes diaphragm dysfunction in newborn lambs. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2019; 23:123. [PMID: 30992039 PMCID: PMC6469194 DOI: 10.1186/s13054-019-2409-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 03/25/2019] [Indexed: 01/11/2023]
Abstract
Background Diaphragm weakness occurs rapidly in adult animals treated with mechanical ventilation (MV), but the effects of MV on the neonatal diaphragm have not been determined. Furthermore, it is unknown whether co-existent lung disease exacerbates ventilator-induced diaphragmatic dysfunction (VIDD). We investigated the impact of MV (mean duration = 7.65 h), either with or without co-existent respiratory failure caused by surfactant deficiency, on the development of VIDD in newborn lambs. Methods Newborn lambs (1–4 days) were assigned to control (CTL, non-ventilated), mechanically ventilated (MV), and MV + experimentally induced surfactant deficiency (MV+SD) groups. Immunoblotting and quantitative PCR assessed inflammatory signaling, the ubiquitin-proteasome system, autophagy, and oxidative stress. Immunostaining for myosin heavy chain (MyHC) isoforms and quantitative morphometry evaluated diaphragm atrophy. Contractile function of the diaphragm was determined in isolated myofibrils ex vivo. Results Equal decreases (25–30%) in myofibrillar force generation were found in MV and MV+SD diaphragms compared to CTL. In comparison to CTL, both MV and MV+SD diaphragms also demonstrated increased STAT3 transcription factor phosphorylation. Ubiquitin-proteasome system (Atrogin1 and MuRF1) transcripts and autophagy indices (Gabarapl1 transcripts and the ratio of LC3B-II/LC3B-I protein) were greater in MV+SD relative to MV alone, but fiber type atrophy was not observed in any group. Protein carbonylation and 4-hydroxynonenal levels (indices of oxidative stress) also did not differ among groups. Conclusions In newborn lambs undergoing controlled MV, there is a rapid onset of diaphragm dysfunction consistent with VIDD. Superimposed lung injury caused by surfactant deficiency did not influence the severity of early diaphragm weakness. Electronic supplementary material The online version of this article (10.1186/s13054-019-2409-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Feng Liang
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Guillaume Emeriaud
- Pediatric Intensive Care Unit, Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, Montreal, QC, Canada
| | - Dilson E Rassier
- Department of Kinesiology, McGill University, Montreal, QC, Canada
| | - Dong Shang
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Ekaterina Gusev
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Sabah N A Hussain
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada
| | - Michael Sage
- Neonatal Respiratory Research Unit, Department of Pediatrics, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Benjamin Crulli
- Pediatric Intensive Care Unit, Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, Montreal, QC, Canada
| | - Etienne Fortin-Pellerin
- Neonatal Respiratory Research Unit, Department of Pediatrics, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Jean-Paul Praud
- Neonatal Respiratory Research Unit, Department of Pediatrics, University of Sherbrooke, Sherbrooke, QC, Canada
| | - Basil J Petrof
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada.
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Tang H, Shrager JB. The Signaling Network Resulting in Ventilator-induced Diaphragm Dysfunction. Am J Respir Cell Mol Biol 2019; 59:417-427. [PMID: 29768017 DOI: 10.1165/rcmb.2018-0022tr] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Mechanical ventilation (MV) is a life-saving measure for those incapable of adequately ventilating or oxygenating without assistance. Unfortunately, even brief periods of MV result in diaphragm weakness (i.e., ventilator-induced diaphragm dysfunction [VIDD]) that may render it difficult to wean the ventilator. Prolonged MV is associated with cascading complications and is a strong risk factor for death. Thus, prevention of VIDD may have a dramatic impact on mortality rates. Here, we summarize the current understanding of the pathogenic events underlying VIDD. Numerous alterations have been proven important in both human and animal MV diaphragm. These include protein degradation via the ubiquitin proteasome system, autophagy, apoptosis, and calpain activity-all causing diaphragm muscle fiber atrophy, altered energy supply via compromised oxidative phosphorylation and upregulation of glycolysis, and also mitochondrial dysfunction and oxidative stress. Mitochondrial oxidative stress in fact appears to be a central factor in each of these events. Recent studies by our group and others indicate that mitochondrial function is modulated by several signaling molecules, including Smad3, signal transducer and activator of transcription 3, and FoxO. MV rapidly activates Smad3 and signal transducer and activator of transcription 3, which upregulate mitochondrial oxidative stress. Additional roles may be played by angiotensin II and leaky ryanodine receptors causing elevated calcium levels. We present, here, a hypothetical scaffold for understanding the molecular pathogenesis of VIDD, which links together these elements. These pathways harbor several drug targets that could soon move toward testing in clinical trials. We hope that this review will shape a short list of the most promising candidates.
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Affiliation(s)
- Huibin Tang
- Stanford University School of Medicine, Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford, California; and Veterans Affairs Palo Alto Healthcare System, Palo Alto, California
| | - Joseph B Shrager
- Stanford University School of Medicine, Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford, California; and Veterans Affairs Palo Alto Healthcare System, Palo Alto, California
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35
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Vincent AE, White K, Davey T, Philips J, Ogden RT, Lawless C, Warren C, Hall MG, Ng YS, Falkous G, Holden T, Deehan D, Taylor RW, Turnbull DM, Picard M. Quantitative 3D Mapping of the Human Skeletal Muscle Mitochondrial Network. Cell Rep 2019; 26:996-1009.e4. [PMID: 30655224 PMCID: PMC6513570 DOI: 10.1016/j.celrep.2019.01.010] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/11/2018] [Accepted: 01/02/2019] [Indexed: 01/07/2023] Open
Abstract
Genetic and biochemical defects of mitochondrial function are a major
cause of human disease, but their link to mitochondrial morphology in
situ has not been defined. Here, we develop a quantitative
three-dimensional approach to map mitochondrial network organization in human
muscle at electron microscopy resolution. We establish morphological differences
between human and mouse and among patients with mitochondrial DNA (mtDNA)
diseases compared to healthy controls. We also define the ultrastructure and
prevalence of mitochondrial nanotunnels, which exist as either free-ended or
connecting membrane protrusions across non-adjacent mitochondria. A multivariate
model integrating mitochondrial volume, morphological complexity, and branching
anisotropy computed across individual mitochondria and mitochondrial populations
identifies increased proportion of simple mitochondria and nanotunnels as a
discriminant signature of mitochondrial stress. Overall, these data define the
nature of the mitochondrial network in human muscle, quantify human-mouse
differences, and suggest potential morphological markers of mitochondrial
dysfunction in human tissues. Vincent et al. use 3D electron microscopy to provide a quantitative
morphometric assessment of human skeletal muscle mitochondria. They find that
healthy human muscle mitochondria differ from mouse mitochondria and show that
primary mtDNA defects are associated with a distinct morphological signature
including increased abundance of mitochondrial nanotunnels.
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Affiliation(s)
- Amy E Vincent
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK; MRC Centre for Ageing and Vitality, Newcastle University, Newcastle upon Tyne, UK
| | - Kathryn White
- EM Research Services, Newcastle University, Newcastle upon Tyne, UK
| | - Tracey Davey
- EM Research Services, Newcastle University, Newcastle upon Tyne, UK
| | - Jonathan Philips
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - R Todd Ogden
- Institute of Child Health, University College London, London, UK
| | - Conor Lawless
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Charlotte Warren
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK; MRC Centre for Ageing and Vitality, Newcastle University, Newcastle upon Tyne, UK
| | - Matt G Hall
- National Physical Laboratory, Teddington, UK; Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Yi Shiau Ng
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Gavin Falkous
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Thomas Holden
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - David Deehan
- Department of Biostatistics, Columbia University Mailman School of Public Health, New York, NY, USA
| | - Robert W Taylor
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Doug M Turnbull
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK; MRC Centre for Ageing and Vitality, Newcastle University, Newcastle upon Tyne, UK.
| | - Martin Picard
- Department of Psychiatry, Division of Behavioral Medicine, Columbia University Irving Medical Center, New York, NY, USA; Department of Neurology and Columbia Translational Neuroscience Initiative, H. Houston Merritt Center, Columbia University Irving Medical Center, New York, NY, USA; Columbia University Aging Center, Columbia University, New York, NY, USA.
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36
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Vaz Fragoso CA, Manini TM, Kairalla JA, Buford TW, Hsu FC, Gill TM, Kritchevsky SB, McDermott MM, Sanders JL, Cummings SR, Tranah GJ. Mitochondrial DNA variants and pulmonary function in older persons. Exp Gerontol 2018; 115:96-103. [PMID: 30508565 DOI: 10.1016/j.exger.2018.11.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 11/01/2018] [Accepted: 11/28/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND We provide the first examination of mitochondrial DNA (mtDNA) variants and pulmonary function in older persons. METHODS Cross-sectional associations between mtDNA variants and pulmonary function were evaluated as a combined p-values meta-analysis, using data from two independent cohorts of older persons. The latter included white and black participants, aged ≥70 years, from the Lifestyle Interventions and Independence for Elders study (LIFE) (N = 1247) and the Health, Aging and Body Composition study (Health ABC) (N = 731), respectively. Pulmonary function included the forced expiratory volume in one-second as a Z-score (FEV1z) and the maximal inspiratory pressure (MIP) in cm of water. RESULTS In black participants, significant associations were found between mtDNA variants and MIP: m.7146A > G, COI (p = 3E-5); m.7389 T > C, COI (p = 2E-4); m.15301G > A, CYB (p = 9E-5); m.16265A > G, HV1 (p = 9E-5); meta-analytical p-values <0.0002. Importantly, these mtDNA variants were unique to black participants and were not present in white participants. Moreover, in black participants, aggregate genetic effects on MIP were observed across mutations in oxidative phosphorylation complex IV (p = 0.004), complex V (p = 0.0007), and hypervariable (p = 0.003) regions. The individual and aggregate variant results were significant after adjustment for multiple comparisons. Otherwise, no significant associations were detected for MIP in whites or for FEV1z in whites or blacks. CONCLUSIONS We have shown that mtDNA variants of African origin are cross-sectionally associated with MIP, a measure of respiratory muscle strength. Thus, our results establish the rationale for longitudinal studies to evaluate whether mtDNA variants of African origin identify those at risk of subsequently developing a respiratory muscle impairment (lower MIP values).
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Affiliation(s)
- Carlos A Vaz Fragoso
- Yale School of Medicine, Department of Medicine, New Haven, CT, United States of America; Veterans Affairs Connecticut Healthcare System, Department of Medicine, West Haven, CT, United States of America.
| | - Todd M Manini
- University of Florida, Department of Aging and Geriatric Research, Gainesville, FL, United States of America
| | - John A Kairalla
- University of Florida, Department of Biostatistics, Gainesville, FL, United States of America
| | - Thomas W Buford
- University of Alabama at Birmingham, Department of Medicine, Birmingham, AL, United States of America
| | - Fang-Chi Hsu
- Wake Forest School of Medicine, Department of Biostatistical Sciences, Winston-Salem, NC, United States of America
| | - Thomas M Gill
- Yale School of Medicine, Department of Medicine, New Haven, CT, United States of America
| | - Stephen B Kritchevsky
- Wake Forest School of Medicine, Sticht Center for Healthy Aging and Alzheimer's Prevention, Winston-Salem, NC, United States of America
| | - Mary M McDermott
- Northwestern University, Feinberg School of Medicine, Chicago, IL, United States of America
| | - Jason L Sanders
- Massachusetts General Hospital, Department of Medicine, Boston, MA, United States of America
| | - Steven R Cummings
- California Pacific Medical Center Research Institute, San Francisco, CA, United States of America
| | - Gregory J Tranah
- California Pacific Medical Center Research Institute, San Francisco, CA, United States of America
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37
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Liu YY, Li LF. Ventilator-induced diaphragm dysfunction in critical illness. Exp Biol Med (Maywood) 2018; 243:1329-1337. [PMID: 30453774 DOI: 10.1177/1535370218811950] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
IMPACT STATEMENT Mechanical ventilation (MV) is life-saving for patients with acute respiratory failure but also causes difficult liberation of patients from ventilator due to rapid decrease of diaphragm muscle endurance and strength, which is termed ventilator-induced diaphragmatic damage (VIDD). Numerous studies have revealed that VIDD could increase extubation failure, ICU stay, ICU mortality, and healthcare expenditures. However, the mechanisms of VIDD, potentially involving a multistep process including muscle atrophy, oxidative loads, structural damage, and muscle fiber remodeling, are not fully elucidated. Further research is necessary to unravel mechanistic framework for understanding the molecular mechanisms underlying VIDD, especially mitochondrial dysfunction and increased mitochondrial oxidative stress, and develop better MV strategies, rehabilitative programs, and pharmacologic agents to translate this knowledge into clinical benefits.
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Affiliation(s)
- Yung-Yang Liu
- 1 Chest Department, Taipei Veterans General Hospital, Taipei 112, Taiwan.,2 Institutes of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan
| | - Li-Fu Li
- 3 Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan 333, Taiwan.,4 Department of Respiratory Therapy, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
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38
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Hyatt H, Deminice R, Yoshihara T, Powers SK. Mitochondrial dysfunction induces muscle atrophy during prolonged inactivity: A review of the causes and effects. Arch Biochem Biophys 2018; 662:49-60. [PMID: 30452895 DOI: 10.1016/j.abb.2018.11.005] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 11/05/2018] [Indexed: 02/08/2023]
Abstract
Prolonged skeletal muscle inactivity (e.g. limb immobilization, bed rest, mechanical ventilation, spinal cord injury, etc.) results in muscle atrophy that manifests into a decreased quality of life and in select patient populations, a higher risk of morbidity and mortality. Thus, understanding the processes that contribute to muscle atrophy during prolonged periods of muscle disuse is an important area of research. In this regard, mitochondrial dysfunction has been directly linked to the muscle wasting that occurs during extended periods of skeletal muscle inactivity. While the concept that mitochondrial dysfunction contributes to disuse muscle atrophy has been contemplated for nearly 50 years, the mechanisms connecting mitochondrial signaling events to skeletal muscle atrophy remained largely unexplained until recently. Indeed, emerging evidence reveals that mitochondrial dysfunction and the associated mitochondrial signaling events are a requirement for several forms of inactivity-induced skeletal muscle atrophy. Specifically, inactivity-induced alterations in skeletal muscle mitochondria phenotype and increased ROS emission, impaired Ca2+ handling, and release of mitochondria-specific proteolytic activators are established occurrences that promote fiber atrophy during prolonged periods of muscle inactivity. This review highlights the evidence that directly connects mitochondrial dysfunction and aberrant mitochondrial signaling with skeletal muscle atrophy and discusses the mechanisms linking these interconnected phenomena.
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Affiliation(s)
- Hayden Hyatt
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
| | - Rafael Deminice
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Physical Education, University of Estadual of Londrina, Londrina, Brazil
| | - Toshinori Yoshihara
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Department of Exercise Physiology, Juntendo University, Tokyo, Japan
| | - Scott K Powers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
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Attenuation of ventilation-induced diaphragm dysfunction through toll-like receptor 4 and nuclear factor-κB in a murine endotoxemia model. J Transl Med 2018; 98:1170-1183. [PMID: 29925937 DOI: 10.1038/s41374-018-0081-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 04/19/2018] [Accepted: 04/23/2018] [Indexed: 01/30/2023] Open
Abstract
Mechanical ventilation (MV) is often used to maintain life in patients with sepsis and sepsis-related acute lung injury. However, controlled MV may cause diaphragm weakness due to muscle injury and atrophy, an effect termed ventilator-induced diaphragm dysfunction (VIDD). Toll-like receptor 4 (TLR4) and nuclear factor-κB (NF-κB) signaling pathways may elicit sepsis-related acute inflammatory responses and muscle protein degradation and mediate the pathogenic mechanisms of VIDD. However, the mechanisms regulating the interactions between VIDD and endotoxemia are unclear. We hypothesized that mechanical stretch with or without endotoxin treatment would augment diaphragmatic structural damage, the production of free radicals, muscle proteolysis, mitochondrial dysfunction, and autophagy of the diaphragm via the TLR4/NF-κB pathway. Male C57BL/6 mice, either wild-type or TLR4-deficient, aged between 6 and 8 weeks were exposed to MV (6 mL/kg or 10 mL/kg) with or without endotoxemia for 8 h. Nonventilated mice were used as controls. MV with endotoxemia aggravated VIDD, as demonstrated by the increases in the expression levels of TLR4, caspase-3, atrogin-1, muscle ring finger-1, and microtubule-associated protein light chain 3-II. In addition, increased NF-κB phosphorylation and oxidative loads, disorganized myofibrils, disrupted mitochondria, autophagy, and myonuclear apoptosis were also observed. Furthermore, MV with endotoxemia reduced P62 levels and diaphragm muscle fiber size (P < 0.05). Endotoxin-exacerbated VIDD was attenuated by pharmacologic inhibition with a NF-κB inhibitor or in TLR4-deficient mice (P < 0.05). Our data indicate that endotoxin-augmented MV-induced diaphragmatic injury occurs through the activation of the TLR4/NF-κB signaling pathway.
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40
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Diaphragm Weakness in the Critically Ill: Basic Mechanisms Reveal Therapeutic Opportunities. Chest 2018; 154:1395-1403. [PMID: 30144420 DOI: 10.1016/j.chest.2018.08.1028] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/23/2018] [Accepted: 08/01/2018] [Indexed: 12/11/2022] Open
Abstract
The diaphragm is the primary muscle of inspiration. Its capacity to respond to the load imposed by pulmonary disease is a major determining factor both in the onset of ventilatory failure and in the ability to successfully separate patients from ventilator support. It has recently been established that a very large proportion of critically ill patients exhibit major weakness of the diaphragm, which is associated with poor clinical outcomes. The two greatest risk factors for the development of diaphragm weakness in critical illness are the use of mechanical ventilation and the presence of sepsis. Loss of force production by the diaphragm under these conditions is caused by a combination of defective contractility and reduced diaphragm muscle mass. Importantly, many of the same molecular mechanisms are implicated in the diaphragm dysfunction associated with both mechanical ventilation and sepsis. This review outlines the primary cellular mechanisms identified thus far at the nexus of diaphragm dysfunction associated with mechanical ventilation and/or sepsis, and explores the potential for treatment or prevention of diaphragm weakness in critically ill patients through therapeutic manipulation of these final common pathway targets.
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41
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Mitochondrial dynamics in adaptive and maladaptive cellular stress responses. Nat Cell Biol 2018; 20:755-765. [PMID: 29950571 DOI: 10.1038/s41556-018-0133-0] [Citation(s) in RCA: 361] [Impact Index Per Article: 60.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 05/29/2018] [Indexed: 12/22/2022]
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42
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Greising SM, Ottenheijm CAC, O'Halloran KD, Barreiro E. Diaphragm plasticity in aging and disease: therapies for muscle weakness go from strength to strength. J Appl Physiol (1985) 2018; 125:243-253. [PMID: 29672230 DOI: 10.1152/japplphysiol.01059.2017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The diaphragm is the main inspiratory muscle and is required to be highly active throughout the life span. The diaphragm muscle must be able to produce and sustain various behaviors that range from ventilatory to nonventilatory such as those required for airway maintenance and clearance. Throughout the life span various circumstances and conditions may affect the ability of the diaphragm muscle to generate requisite forces, and in turn the diaphragm muscle may undergo significant weakness and dysfunction. For example, hypoxic stress, critical illness, cancer cachexia, chronic obstructive pulmonary disorder, and age-related sarcopenia all represent conditions in which significant diaphragm muscle dysfunction exits. This perspective review article presents several interesting topics involving diaphragm plasticity in aging and disease that were presented at the International Union of Physiological Sciences Conference in 2017. This review seeks to maximize the broad and collective research impact on diaphragm muscle dysfunction in the search for transformative treatment approaches to improve the diaphragm muscle health during aging and disease.
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Affiliation(s)
- Sarah M Greising
- Department of Physiology and Biomedical Engineering, Mayo Clinic , Rochester, Minnesota.,School of Kinesiology, University of Minnesota , Minneapolis, Minnesota
| | - Coen A C Ottenheijm
- Department of Physiology, VU University Medical Center , Amsterdam , The Netherlands.,Cellular and Molecular Medicine, University of Arizona , Tucson, Arizona
| | - Ken D O'Halloran
- Department of Physiology, University College Cork , Cork , Ireland
| | - Esther Barreiro
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department, Universitat Pompeu Fabra, Barcelona Biomedical Research Park, Barcelona , Spain.,Centro de Investigación en Red de Enfermedades Respiratorias, Instituto de Salud Carlos III , Barcelona , Spain
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43
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Cuillerier A, Honarmand S, Cadete VJJ, Ruiz M, Forest A, Deschênes S, Beauchamp C, Charron G, Rioux JD, Des Rosiers C, Shoubridge EA, Burelle Y. Loss of hepatic LRPPRC alters mitochondrial bioenergetics, regulation of permeability transition and trans-membrane ROS diffusion. Hum Mol Genet 2018; 26:3186-3201. [PMID: 28575497 DOI: 10.1093/hmg/ddx202] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 05/19/2017] [Indexed: 12/19/2022] Open
Abstract
The French-Canadian variant of Leigh Syndrome (LSFC) is an autosomal recessive oxidative phosphorylation (OXPHOS) disorder caused by a mutation in LRPPRC, coding for a protein involved in the stability of mitochondrially-encoded mRNAs. Low levels of LRPPRC are present in all patient tissues, but result in a disproportionately severe OXPHOS defect in the brain and liver, leading to unpredictable subacute metabolic crises. To investigate the impact of the OXPHOS defect in the liver, we analyzed the mitochondrial phenotype in mice harboring an hepatocyte-specific inactivation of Lrpprc. Loss of LRPPRC in the liver caused a generalized growth delay, and typical histological features of mitochondrial hepatopathy. At the molecular level, LRPPRC deficiency caused destabilization of polyadenylated mitochondrial mRNAs, altered mitochondrial ultrastructure, and a severe complex IV (CIV) and ATP synthase (CV) assembly defect. The impact of LRPPRC deficiency was not limited to OXPHOS, but also included impairment of long-chain fatty acid oxidation, a striking dysregulation of the mitochondrial permeability transition pore, and an unsuspected alteration of trans-membrane H2O2 diffusion, which was traced to the ATP synthase assembly defect, and to changes in the lipid composition of mitochondrial membranes. This study underscores the value of mitochondria phenotyping to uncover complex and unexpected mechanisms contributing to the pathophysiology of mitochondrial disorders.
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Affiliation(s)
| | - Shamisa Honarmand
- Department of Human Genetics, Montreal Neurological Institute McGill University, Montreal, QC H3A 2B4, Canada
| | | | - Matthieu Ruiz
- Research Center, Montreal Heart Institute, Montreal, QC H1T 1C8, Canada
| | - Anik Forest
- Research Center, Montreal Heart Institute, Montreal, QC H1T 1C8, Canada
| | - Sonia Deschênes
- Faculty of Pharmacy, University of Montreal, Montreal, QC H3C 3J7, Canada.,Faculty of Medicine and Department of Nutrition, Université de Montréal, Montreal, QC H3C 3J7, Canada
| | | | | | - Guy Charron
- Research Center, Montreal Heart Institute, Montreal, QC H1T 1C8, Canada
| | - John D Rioux
- Research Center, Montreal Heart Institute, Montreal, QC H1T 1C8, Canada
| | - Christine Des Rosiers
- Research Center, Montreal Heart Institute, Montreal, QC H1T 1C8, Canada.,Faculty of Medicine and Department of Nutrition, Université de Montréal, Montreal, QC H3C 3J7, Canada
| | - Eric A Shoubridge
- Department of Human Genetics, Montreal Neurological Institute McGill University, Montreal, QC H3A 2B4, Canada
| | - Yan Burelle
- Faculty of Pharmacy, University of Montreal, Montreal, QC H3C 3J7, Canada
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44
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van den Berg M, Hooijman PE, Beishuizen A, de Waard MC, Paul MA, Hartemink KJ, van Hees HWH, Lawlor MW, Brocca L, Bottinelli R, Pellegrino MA, Stienen GJM, Heunks LMA, Wüst RCI, Ottenheijm CAC. Diaphragm Atrophy and Weakness in the Absence of Mitochondrial Dysfunction in the Critically Ill. Am J Respir Crit Care Med 2017; 196:1544-1558. [PMID: 28787181 DOI: 10.1164/rccm.201703-0501oc] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
RATIONALE The clinical significance of diaphragm weakness in critically ill patients is evident: it prolongs ventilator dependency and increases morbidity, duration of hospital stay, and health care costs. The mechanisms underlying diaphragm weakness are unknown, but might include mitochondrial dysfunction and oxidative stress. OBJECTIVES We hypothesized that weakness of diaphragm muscle fibers in critically ill patients is accompanied by impaired mitochondrial function and structure, and by increased markers of oxidative stress. METHODS To test these hypotheses, we studied contractile force, mitochondrial function, and mitochondrial structure in diaphragm muscle fibers. Fibers were isolated from diaphragm biopsies of 36 mechanically ventilated critically ill patients and compared with those isolated from biopsies of 27 patients with suspected early-stage lung malignancy (control subjects). MEASUREMENTS AND MAIN RESULTS Diaphragm muscle fibers from critically ill patients displayed significant atrophy and contractile weakness, but lacked impaired mitochondrial respiration and increased levels of oxidative stress markers. Mitochondrial energy status and morphology were not altered, despite a lower content of fusion proteins. CONCLUSIONS Critically ill patients have manifest diaphragm muscle fiber atrophy and weakness in the absence of mitochondrial dysfunction and oxidative stress. Thus, mitochondrial dysfunction and oxidative stress do not play a causative role in the development of atrophy and contractile weakness of the diaphragm in critically ill patients.
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Affiliation(s)
| | | | - Albertus Beishuizen
- 2 Department of Intensive Care, Medisch Spectrum Twente, Enschede, the Netherlands
| | | | - Marinus A Paul
- 4 Department of Cardiothoracic Surgery, Vrije Universiteit (VU) University Medical Center, Amsterdam, the Netherlands
| | - Koen J Hartemink
- 5 Department of Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
| | | | - Michael W Lawlor
- 7 Division of Pediatric Pathology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | | | - Roberto Bottinelli
- 8 Department of Molecular Medicine.,10 Interdepartmental Center for Biology and Sport Medicine, and.,9 Fondazione Salvatore Maugeri (IRCCS), Scientific Institute of Pavia, Pavia, Italy
| | - Maria A Pellegrino
- 8 Department of Molecular Medicine.,10 Interdepartmental Center for Biology and Sport Medicine, and.,11 Interuniversity Institute of Myology, University of Pavia, Pavia, Italy
| | - Ger J M Stienen
- 1 Department of Physiology, Amsterdam Cardiovascular Sciences.,12 Faculty of Science, Department of Physics and Astronomy, VU Amsterdam, Amsterdam, the Netherlands
| | | | - Rob C I Wüst
- 1 Department of Physiology, Amsterdam Cardiovascular Sciences.,13 Laboratory Genetic Metabolic Diseases, Academic Medical Center, Amsterdam, the Netherlands; and
| | - Coen A C Ottenheijm
- 1 Department of Physiology, Amsterdam Cardiovascular Sciences.,14 Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona
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45
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Tang H, L Kennedy C, Lee M, Gao Y, Xia H, Olguin F, Fraga DA, Ayers K, Choi S, Kim M, Tehrani A, Sowb YA, Rando TA, Shrager JB. Smad3 initiates oxidative stress and proteolysis that underlies diaphragm dysfunction during mechanical ventilation. Sci Rep 2017; 7:14530. [PMID: 29109401 DOI: 10.1038/s41598-017-11978-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 08/23/2017] [Indexed: 01/08/2023] Open
Abstract
Prolonged use of mechanical ventilation (MV) leads to atrophy and dysfunction of the major inspiratory muscle, the diaphragm, contributing to ventilator dependence. Numerous studies have shown that proteolysis and oxidative stress are among the major effectors of ventilator-induced diaphragm muscle dysfunction (VIDD), but the upstream initiator(s) of this process remain to be elucidated. We report here that periodic diaphragm contraction via phrenic nerve stimulation (PNS) substantially reduces MV-induced proteolytic activity and oxidative stress in the diaphragm. We show that MV rapidly induces phosphorylation of Smad3, and PNS nearly completely prevents this effect. In cultured cells, overexpressed Smad3 is sufficient to induce oxidative stress and protein degradation, whereas inhibition of Smad3 activity suppresses these events. In rats subjected to MV, inhibition of Smad3 activity by SIS3 suppresses oxidative stress and protein degradation in the diaphragm and prevents the reduction in contractility that is induced by MV. Smad3's effect appears to link to STAT3 activity, which we previously identified as a regulator of VIDD. Inhibition of Smad3 suppresses STAT3 signaling both in vitro and in vivo. Thus, MV-induced diaphragm inactivity initiates catabolic changes via rapid activation of Smad3 signaling. An early intervention with PNS and/or pharmaceutical inhibition of Smad3 may prevent clinical VIDD.
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Affiliation(s)
- Huibin Tang
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA
| | - Catherine L Kennedy
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA.,University of Maryland School of Medicine, Baltimore, MD, USA
| | - Myung Lee
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA
| | - Yang Gao
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA
| | - Hui Xia
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA.,Department of Thoracic-cardio Surgery, First Affiliated Hospital of PLA General Hospital, Beijing, China
| | - Francesca Olguin
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA
| | - Danielle A Fraga
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA
| | - Kelsey Ayers
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA
| | - Sehoon Choi
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA.,Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, Seoul, Korea
| | - Michael Kim
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.,VA Palo Alto Healthcare System, Palo Alto, CA, USA
| | - Amir Tehrani
- Respiratory Management Technologies, LLC., San Francisco, CA, USA
| | - Yasser A Sowb
- Respiratory Management Technologies, LLC., San Francisco, CA, USA
| | - Thomas A Rando
- VA Palo Alto Healthcare System, Palo Alto, CA, USA.,Paul F. Glenn Laboratories for the Biology of Aging and Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Joseph B Shrager
- Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA. .,VA Palo Alto Healthcare System, Palo Alto, CA, USA.
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46
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Supinski GS, Morris PE, Dhar S, Callahan LA. Diaphragm Dysfunction in Critical Illness. Chest 2017; 153:1040-1051. [PMID: 28887062 DOI: 10.1016/j.chest.2017.08.1157] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 08/17/2017] [Accepted: 08/28/2017] [Indexed: 12/14/2022] Open
Abstract
The diaphragm is the major muscle of inspiration, and its function is critical for optimal respiration. Diaphragmatic failure has long been recognized as a major contributor to death in a variety of systemic neuromuscular disorders. More recently, it is increasingly apparent that diaphragm dysfunction is present in a high percentage of critically ill patients and is associated with increased morbidity and mortality. In these patients, diaphragm weakness is thought to develop from disuse secondary to ventilator-induced diaphragm inactivity and as a consequence of the effects of systemic inflammation, including sepsis. This form of critical illness-acquired diaphragm dysfunction impairs the ability of the respiratory pump to compensate for an increased respiratory workload due to lung injury and fluid overload, leading to sustained respiratory failure and death. This review examines the presentation, causes, consequences, diagnosis, and treatment of disorders that result in acquired diaphragm dysfunction during critical illness.
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Affiliation(s)
- Gerald S Supinski
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Kentucky, Lexington, KY
| | - Peter E Morris
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Kentucky, Lexington, KY
| | - Sanjay Dhar
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Kentucky, Lexington, KY
| | - Leigh Ann Callahan
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Kentucky, Lexington, KY.
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Liang F, Li T, Azuelos I, Giordano C, Liang H, Hussain SN, Matecki S, Petrof BJ. Ventilator-induced diaphragmatic dysfunction in MDX
mice. Muscle Nerve 2017; 57:442-448. [DOI: 10.1002/mus.25760] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 07/26/2017] [Accepted: 08/05/2017] [Indexed: 01/17/2023]
Affiliation(s)
- Feng Liang
- Meakins-Christie Laboratories, and Translational Research in Respiratory Diseases Program; McGill University Health Centre and Research Institute; 1001 Decarie Boulevard, Montreal Quebec H4A 3J1 Canada
| | - Tong Li
- Meakins-Christie Laboratories, and Translational Research in Respiratory Diseases Program; McGill University Health Centre and Research Institute; 1001 Decarie Boulevard, Montreal Quebec H4A 3J1 Canada
| | - Ilan Azuelos
- Meakins-Christie Laboratories, and Translational Research in Respiratory Diseases Program; McGill University Health Centre and Research Institute; 1001 Decarie Boulevard, Montreal Quebec H4A 3J1 Canada
| | - Christian Giordano
- Meakins-Christie Laboratories, and Translational Research in Respiratory Diseases Program; McGill University Health Centre and Research Institute; 1001 Decarie Boulevard, Montreal Quebec H4A 3J1 Canada
| | - Han Liang
- Department of Bioinformatics and Computational Biology; University of Texas MD Anderson Cancer Center; Houston Texas USA
- Department of Systems Biology; University of Texas MD Anderson Cancer Center; Houston Texas USA
| | - Sabah N. Hussain
- Meakins-Christie Laboratories, and Translational Research in Respiratory Diseases Program; McGill University Health Centre and Research Institute; 1001 Decarie Boulevard, Montreal Quebec H4A 3J1 Canada
- Department of Critical Care; McGill University Health Centre; Montreal Quebec Canada
| | - Stefan Matecki
- Pediatric Functional Exploration Unit; University Hospital of Montpellier, UMR CNRS 9214-INSERM U1046, Université Montpellier; Montpellier France
| | - Basil J. Petrof
- Meakins-Christie Laboratories, and Translational Research in Respiratory Diseases Program; McGill University Health Centre and Research Institute; 1001 Decarie Boulevard, Montreal Quebec H4A 3J1 Canada
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48
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Grosu HB, Ost DE, Lee YI, Song J, Li L, Eden E, Rose K. Diaphragm Muscle Thinning in Subjects Receiving Mechanical Ventilation and Its Effect on Extubation. Respir Care 2017; 62:904-911. [PMID: 28351903 DOI: 10.4187/respcare.05370] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Diaphragm muscle weakness and atrophy are consequences of prolonged mechanical ventilation. Our purpose was to determine whether thickness of the diaphragm (TDI) changes over time after intubation and whether the degree of change affects clinical outcome. METHODS For this prospective, longitudinal observational study, we identified subjects who required mechanical ventilation and measured their TDI by ultrasonography. TDI was measured at baseline and repeated 72 h later and then weekly until the subject was either liberated from mechanical ventilation, was referred for tracheostomy, or died. The analysis was designed to determine whether baseline TDI and change in TDI affect extubation outcome. RESULTS Of the 57 subjects who underwent both diaphragm measurements at 72 h, 16 died, 33 were extubated, and 8 underwent tracheostomy. Only 14 subjects received mechanical ventilation for 1 week, and 2 subjects received mechanical ventilation for 2 and 3 weeks. Females had significantly thinner baseline TDI (P = .008). At 72 h, TDI had decreased in 84% of subjects. We found no significant association between the rate of thinning and sex (P = .68), diagnosis of COPD (P = .36), current smoking (P = .85), or pleural effusion (P = .83). Lower baseline TDI was associated with higher likelihood of extubation: 12.5% higher for every 0.01-cm decrease in TDI (hazard ratio 0.875, 95% CI 0.80-0.96, P = .003). For every 0.01-cm decrease in TDI at 72 h, the likelihood of extubation increased by 17% (hazard ratio 0.83, 95% CI 0.70-0.99, P = .041). CONCLUSIONS Although most of the subjects showed evidence of diaphragm thinning, we were unable to find a correlation with outcome of extubation failure. In fact, the thinner the diaphragm at baseline and the greater the extent of diaphragm thinning at 72 h, the greater the likelihood of extubation. Thickening ratio or other measurement may be a more reliable indicator of diaphragm dysfunction and should be explored.
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Affiliation(s)
| | | | - Young Im Lee
- Division of Pulmonary, Critical Care, and Sleep Medicine, Mount Sinai West, New York, New York
| | - Juhee Song
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Liang Li
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Edward Eden
- Division of Pulmonary, Critical Care, and Sleep Medicine, Mount Sinai West, New York, New York
| | - Keith Rose
- Division of Pulmonary, Critical Care, and Sleep Medicine, Mount Sinai West, New York, New York
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49
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Sollanek KJ, Burniston JG, Kavazis AN, Morton AB, Wiggs MP, Ahn B, Smuder AJ, Powers SK. Global Proteome Changes in the Rat Diaphragm Induced by Endurance Exercise Training. PLoS One 2017; 12:e0171007. [PMID: 28135290 PMCID: PMC5279855 DOI: 10.1371/journal.pone.0171007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 01/13/2017] [Indexed: 01/15/2023] Open
Abstract
Mechanical ventilation (MV) is a life-saving intervention for many critically ill patients. Unfortunately, prolonged MV results in the rapid development of diaphragmatic atrophy and weakness. Importantly, endurance exercise training results in a diaphragmatic phenotype that is protected against ventilator-induced diaphragmatic atrophy and weakness. The mechanisms responsible for this exercise-induced protection against ventilator-induced diaphragmatic atrophy remain unknown. Therefore, to investigate exercise-induced changes in diaphragm muscle proteins, we compared the diaphragmatic proteome from sedentary and exercise-trained rats. Specifically, using label-free liquid chromatography-mass spectrometry, we performed a proteomics analysis of both soluble proteins and mitochondrial proteins isolated from diaphragm muscle. The total number of diaphragm proteins profiled in the soluble protein fraction and mitochondrial protein fraction were 813 and 732, respectively. Endurance exercise training significantly (P<0.05, FDR <10%) altered the abundance of 70 proteins in the soluble diaphragm proteome and 25 proteins of the mitochondrial proteome. In particular, key cytoprotective proteins that increased in relative abundance following exercise training included mitochondrial fission process 1 (Mtfp1; MTP18), 3-mercaptopyruvate sulfurtransferase (3MPST), microsomal glutathione S-transferase 3 (Mgst3; GST-III), and heat shock protein 70 kDa protein 1A/1B (HSP70). While these proteins are known to be cytoprotective in several cell types, the cyto-protective roles of these proteins have yet to be fully elucidated in diaphragm muscle fibers. Based upon these important findings, future experiments can now determine which of these diaphragmatic proteins are sufficient and/or required to promote exercise-induced protection against inactivity-induced muscle atrophy.
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Affiliation(s)
- Kurt J. Sollanek
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States of America
- * E-mail:
| | - Jatin G. Burniston
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Andreas N. Kavazis
- School of Kinesiology, Auburn University, Auburn, Alabama, United States of America
| | - Aaron B. Morton
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States of America
| | - Michael P. Wiggs
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States of America
| | - Bumsoo Ahn
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States of America
| | - Ashley J. Smuder
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States of America
| | - Scott K. Powers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, United States of America
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50
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Gouspillou G, Hepple RT. Editorial: Mitochondria in Skeletal Muscle Health, Aging and Diseases. Front Physiol 2016; 7:446. [PMID: 27766080 PMCID: PMC5052271 DOI: 10.3389/fphys.2016.00446] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 09/20/2016] [Indexed: 01/11/2023] Open
Affiliation(s)
- Gilles Gouspillou
- Département des Sciences de l'Activité Physique, Faculté des Sciences, Université du Québec à MontréalMontreal, QC, Canada; Groupe de Recherche en Activité Physique AdaptéeMontreal, QC, Canada; Centre de Recherche de l'Institut, Universitaire de Gériatrie de MontréalMontreal, QC, Canada
| | - Russell T Hepple
- Department of Kinesiology and Physical Education, McGill UniversityMontreal, QC, Canada; Meakins-Christie Laboratory, Research Institute of the McGill University Health CentreMontreal, QC, Canada
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