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Chuang CC, Zhou T, Olfert IM, Zuo L. Hypoxic Preconditioning Attenuates Reoxygenation-Induced Skeletal Muscle Dysfunction in Aged Pulmonary TNF-α Overexpressing Mice. Front Physiol 2019; 9:1720. [PMID: 30622474 PMCID: PMC6308319 DOI: 10.3389/fphys.2018.01720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 11/15/2018] [Indexed: 11/26/2022] Open
Abstract
Aim: Skeletal muscle subjected to hypoxia followed by reoxygenation is susceptible to injury and subsequent muscle function decline. This phenomenon can be observed in the diaphragm during strenuous exercise or in pulmonary diseases such as chronic obstructive pulmonary diseases (COPD). Previous studies have shown that PO2 cycling or hypoxic preconditioning (HPC), as it can also be referred to as, protects muscle function via mechanisms involving reactive oxygen species (ROS). However, this HPC protection has not been fully elucidated in aged pulmonary TNF-α overexpressing (Tg+) mice (a COPD-like model). We hypothesize that HPC can exert protection on the diaphragms of Tg+ mice during reoxygenation through pathways involving ROS/phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt)/extracellular signal regulated kinase (ERK), as well as the downstream activation of mitochondrial ATP-sensitive potassium channel (mitoKATP) and inhibition of mitochondrial permeability transition pore (mPTP). Methods: Isolated Tg+ diaphragm muscle strips were pre-treated with inhibitors for ROS, PI3K, Akt, ERK, or a combination of mitoKATP inhibitor and mPTP opener, respectively, prior to HPC. Another two groups of muscles were treated with either mitoKATP activator or mPTP inhibitor without HPC. Muscles were treated with 30-min hypoxia, followed by 15-min reoxygenation. Data were analyzed by multi-way ANOVA and expressed as means ± SE. Results: Muscle treated with HPC showed improved muscle function during reoxygenation (n = 5, p < 0.01). Inhibition of ROS, PI3K, Akt, or ERK abolished the protective effect of HPC. Simultaneous inhibition of mitoKATP and activation of mPTP also diminished HPC effects. By contrast, either the opening of mitoKATP channel or the closure of mPTP provided a similar protective effect to HPC by alleviating muscle function decline, suggesting that mitochondria play a role in HPC initiation (n = 5; p < 0.05). Conclusion: Hypoxic preconditioning may protect respiratory skeletal muscle function in Tg+ mice during reoxygenation through redox-sensitive signaling cascades and regulations of mitochondrial channels.
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Affiliation(s)
- Chia-Chen Chuang
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States.,Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, United States
| | - Tingyang Zhou
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States.,Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, United States
| | - I Mark Olfert
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, United States
| | - Li Zuo
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States.,Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, United States.,Department of Biology, The University of Maine, Presque Isle, ME, United States
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He F, Chuang CC, Zhou T, Jiang Q, Sedlock DA, Zuo L. Redox correlation in muscle lengthening and immune response in eccentric exercise. PLoS One 2018; 13:e0208799. [PMID: 30589838 PMCID: PMC6307742 DOI: 10.1371/journal.pone.0208799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 11/26/2018] [Indexed: 11/19/2022] Open
Abstract
This study was designed to examine the potential involvement of reactive oxygen species in skeletal muscle dysfunction linked with stretching in a mouse model and to explore the effects of combined antioxidant intake on peripheral leukocyte apoptosis following eccentrically-biased downhill runs in human subjects. In the mouse model, diaphragmatic muscle was stretched by 30% of its optimal length, followed by 5-min contraction. Muscle function and extracellular reactive oxygen species release was measured ex vivo. In human models, participants performed two trials of downhill running either with or without antioxidant supplementation, followed by apoptotic assay of inflammatory cells in the blood. The results showed that stretch led to decreased muscle function and prominent ROS increase during muscle contraction. In human models, we observed an elevation in circulating leukocyte apoptosis 24-48 hours following acute downhill runs. However, there is an attenuated leukocyte apoptosis following the second bout of downhill run. Interestingly, the combination of ascorbic acid (vitamin C) and α-tocopherol (vitamin E) supplementation attenuated the decrease in B-cell lymphoma 2 (Bcl-2) at 24 hours following acute downhill running. These data collectively suggest that significant ROS formation can be induced by muscle-lengthening associated with eccentric exercise, which is accompanied by compromised muscle function. The combination of antioxidants supplementation appears to have a protective role via the attenuation of decrease in anti-apoptotic protein.
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Affiliation(s)
- Feng He
- Department of Health and Kinesiology, College of Health and Human Sciences, Purdue University, West Lafayette, IN, United States of America
- Department of Kinesiology, California State University-Chico, Chico, CA, United States of America
| | - Chia-Chen Chuang
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, United States of America
| | - Tingyang Zhou
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, United States of America
| | - Qing Jiang
- Department of Nutrition Science, College of Health and Human Science, Purdue University, West Lafayette, IN, United States of America
| | - Darlene A. Sedlock
- Department of Health and Kinesiology, College of Health and Human Sciences, Purdue University, West Lafayette, IN, United States of America
- * E-mail: (LZ); (DAS)
| | - Li Zuo
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, United States of America
- Molecular Physiology and Biophysics Laboratory, College of Arts and Sciences, University of Maine, Presque Isle, ME, United States of America
- * E-mail: (LZ); (DAS)
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Dawson NJ, Lyons SA, Henry DA, Scott GR. Effects of chronic hypoxia on diaphragm function in deer mice native to high altitude. Acta Physiol (Oxf) 2018; 223:e13030. [PMID: 29316265 DOI: 10.1111/apha.13030] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 12/08/2017] [Accepted: 12/31/2017] [Indexed: 12/22/2022]
Abstract
AIM We examined the effects of chronic hypoxia on diaphragm function in high- and low-altitude populations of Peromyscus mice. METHODS Deer mice (P. maniculatus) native to high altitude and congeneric mice native to low altitude (P. leucopus) were born and raised in captivity to adulthood and were acclimated to normoxia or hypobaric hypoxia (12 or 9 kPa, simulating hypoxia at 4300 and 7000 m) for 6-8 weeks. We then measured indices of mitochondrial respiration capacity, force production, and fatigue resistance in the diaphragm. RESULTS Mitochondrial respiratory capacities (assessed using permeabilized fibres with single or multiple inputs to the electron transport system), citrate synthase activity (a marker of mitochondrial volume), twitch force production, and muscle fatigue resistance increased after exposure to chronic hypoxia in both populations. These changes were not well explained by variation in the fibre-type composition of the muscle. However, there were several differences in diaphragm function in high-altitude mice compared to low-altitude mice. Exposure to a deeper level of hypoxia (9 kPa vs 12 kPa) was needed to elicit increases in mitochondrial respiration rates in highlanders. Chronic hypoxia did not increase the emission of reactive oxygen species from permeabilized fibres in highlanders, in contrast to the pronounced increases that occurred in lowlanders. In general, the diaphragm of high-altitude mice had greater capillary length densities, produced less force in response to stimulation and had shorter relaxation times. The latter was associated with higher activity of sarcoplasmic reticulum Ca2+ -ATPase (SERCA) activity in the diaphragm of high-altitude mice. CONCLUSION Overall, our work suggests that exposure to chronic hypoxia increases the capacities for mitochondrial respiration, force production and fatigue resistance of the diaphragm. However, many of these effects are opposed by evolved changes in diaphragm function in high-altitude natives, such that highlanders in chronic hypoxia maintain similar diaphragm function to lowlanders in sea level conditions.
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Affiliation(s)
- N. J. Dawson
- Department of Biology; McMaster University; Hamilton ON Canada
| | - S. A. Lyons
- Department of Biology; McMaster University; Hamilton ON Canada
| | - D. A. Henry
- Department of Biology; McMaster University; Hamilton ON Canada
| | - G. R. Scott
- Department of Biology; McMaster University; Hamilton ON Canada
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Guo H, Zheng H, Wu J, Ma HP, Yu J, Yiliyaer M. The key role of microtubules in hypoxia preconditioning-induced nuclear translocation of HIF-1α in rat cardiomyocytes. PeerJ 2017; 5:e3662. [PMID: 28828258 PMCID: PMC5560226 DOI: 10.7717/peerj.3662] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 07/18/2017] [Indexed: 12/11/2022] Open
Abstract
Background Hypoxia-inducible factor (HIF)-1 is involved in the regulation of hypoxic preconditioning in cardiomyocytes. Under hypoxic conditions, HIF-1α accumulates and is translocated to the nucleus, where it forms an active complex with HIF-1β and activates transcription of approximately 60 kinds of hypoxia-adaptive genes. Microtubules are hollow tubular structures in the cell that maintain cellular morphology and that transport substances. This study attempted to clarify the role of microtubule structure in the endonuclear aggregation of HIF-1α following hypoxic preconditioning of cardiomyocytes. Methods Primary rat cardiomyocytes were isolated and cultured. The cardiomyocyte culture system was used to establish a hypoxia model and a hypoxic preconditioning model. Interventions were performed on primary cardiomyocytes using a microtubule-depolymerizing agent and different concentrations of a microtubule stabilizer. The microtubule structure and the degree of HIF-1α nuclear aggregation were observed by confocal laser scanning microscopy. The expression of HIF-1α in the cytoplasm and nucleus was detected using Western blotting. Cardiomyocyte energy content, reflected by adenosine triphosphate/adenosine diphosphate (ATP/ADP), and key glycolytic enzymes were monitored by colorimetry and high-performance liquid chromatography (HPLC). Reactive oxygen species (ROS) production was also used to comprehensively assess whether microtubule stabilization can enhance the myocardial protective effect of hypoxic preconditioning. Results During prolonged hypoxia, it was found that the destruction of the microtubule network structure of cardiomyocytes was gradually aggravated. After this preconditioning, an abundance of HIF-1α was clustered in the nucleus. When the microtubules were depolymerized and hypoxia pretreatment was performed, HIF-1α clustering occurred around the nucleus, and HIF-1α nuclear expression was low. The levels of key glycolytic enzymes were significantly higher in the microtubule stabilizer group than in the hypoxia group. Additionally, the levels of lactate dehydrogenase and ROS were significantly lower in the microtubule stabilizer group than in the hypoxia group. Conclusion The microtubules of cardiomyocytes may be involved in the process of HIF-1α endonuclear aggregation, helping to enhance the anti-hypoxic ability of cardiomyocytes.
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Affiliation(s)
- Hai Guo
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Hong Zheng
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Jianjiang Wu
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Hai-Ping Ma
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Jin Yu
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Maimaitili Yiliyaer
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
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Wu J, Yu J, Xie P, Maimaitili Y, Wang J, Yang L, Ma H, Zhang X, Yang Y, Zheng H. Sevoflurane postconditioning protects the myocardium against ischemia/reperfusion injury via activation of the JAK2-STAT3 pathway. PeerJ 2017; 5:e3196. [PMID: 28392989 PMCID: PMC5382923 DOI: 10.7717/peerj.3196] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/17/2017] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Sevoflurane postconditioning (S-post) has similar cardioprotective effects as ischemic preconditioning. However, the underlying mechanism of S-post has not been fully elucidated. Janus kinase signaling transduction/transcription activator (JAK2-STAT3) plays an important role in cardioprotection. The purpose of this study was to determine whether the cardioprotective effects of S-post are associated with activation of the JAK2-STAT3 signal pathway. METHODS An adult male Sprague-Dawley (SD) rat model of myocardial ischemia/reperfusion (I/R) injury was established using the Langendorff isolated heart perfusion apparatus. At the beginning of reperfusion, 2.4% sevoflurane alone or in combination with AG490 (a JAK2 selective inhibitor) was used as a postconditioning treatment. The cardiac function indicators, myocardial infarct size, lactic dehydrogenase (LDH) release, mitochondrial ultrastructure, mitochondrial reactive oxygen species (ROS) generation rates, ATP content, protein expression of p-JAK, p-STAT3, Bcl-2 and Bax were measured. RESULTS Compared with the I/R group, S-post significantly increased the expression of p-JAK, p-STAT3 and Bcl-2 and reduced the protein expression of Bax, which markedly decreased the myocardial infarction areas, improved the cardiac function indicators and the mitochondrial ultrastructure, decreased the mitochondrial ROS and increased the ATP content. However, the cardioprotective effects of S-post were abolished by treatment with a JAK2 selective inhibitor (p < 0.05). CONCLUSION This study demonstrates that the cardioprotective effects of S-post are associated with the activation of JAK2-STAT3. The mechanism may be related to an increased expression of p-JAK2 and p-STAT3 after S-post, which reduced mitochondrial ROS generation and increased mitochondrial ATP content, thereby reducing apoptosis and myocardial infarct size.
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Affiliation(s)
- Jianjiang Wu
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Jin Yu
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Peng Xie
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Yiliyaer Maimaitili
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Jiang Wang
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Long Yang
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Haiping Ma
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Xing Zhang
- Department of Aerospace Medicine, Fourth Military Medical University , Xi'an, Shanxi , China
| | - Yining Yang
- Department of Cardiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
| | - Hong Zheng
- Department of Anesthesiology, The First Affiliated Hospital of Xinjiang Medical University , Urumqi, Xinjiang , China
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Characteristics of Alpha-1 Antitrypsin-Deficient Individuals in the Long-term Oxygen Treatment Trial and Comparison with Other Subjects with Chronic Obstructive Pulmonary Disease. Ann Am Thorac Soc 2016; 12:1796-804. [PMID: 26653189 DOI: 10.1513/annalsats.201506-389oc] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
RATIONALE Alpha-1 antitrypsin deficiency (AATD) predisposes to chronic obstructive pulmonary disease, but is underrecognized. Oxygenation and exercise desaturation in individuals with AATD-associated chronic obstructive pulmonary disease has been sparsely studied. The Long-term Oxygen Treatment Trial (LOTT) permits comparing these features of individuals with AATD with alpha-1 antitrypsin-replete (called "usual chronic obstructive pulmonary disease") LOTT participants. OBJECTIVES Compare demographic, clinical, baseline oxygenation, and exercise desaturation features in participating AATD subjects with those of other LOTT subjects. METHODS LOTT is a multicenter randomized controlled trial comparing use of supplemental oxygen versus not in subjects with chronic obstructive pulmonary disease and moderate hypoxemia (resting oxygen saturation as measured by pulse oximetry, 89-93%) or normal oxygen saturation at rest and significant exercise desaturation. MEASUREMENT AND MAIN RESULTS Among the 597 LOTT participants with nonmissing alpha-1 antitrypsin levels, 11 (1.8%) had severe AATD and 44 (7.4%) had mild/moderate AATD. Comparison of the 11 severely AAT-deficient individuals with the 542 LOTT participants with usual chronic obstructive pulmonary disease showed that the AATD subjects were younger and despite less smoking, had lower FEV1/FVC (mean post-bronchodilator FEV1/FVC, 0.38 ± 0.06 vs. 0.46 ± 0.13; P = 0.002). Comparison with 27 age-, sex-, and FEV1-matched alpha-1 antitrypsin-normal LOTT participants showed no baseline difference in resting room air pulse oximetry saturation (AATD, 93.6% ± 2.3% vs. 92.7% ± 2.2%; P = 0.64). Exercise-related desaturation was more severe in the individuals with AATD based on desaturation to 88% or less sooner during a 6-minute-walk test, having a higher percentage of desaturation points (e.g., <90%) during exercise, and having a higher distance-saturation product (defined as the distance walked in 6 min multiplied by the nadir saturation achieved during the 6-minute-walk test). CONCLUSIONS These data suggest that individuals with AATD experience more profound desaturation with exercise than age-, sex-, race-, and FEV1-matched control subjects with usual chronic obstructive pulmonary disease. Clinical trial registered with www.clinicaltrials.gov (NCT 00692198).
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Historical role of alpha-1-antitrypsin deficiency in respiratory and hepatic complications. Gene 2016; 589:118-22. [DOI: 10.1016/j.gene.2016.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/11/2015] [Accepted: 01/03/2016] [Indexed: 12/14/2022]
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Ma L, Chuang CC, Weng W, Zhao L, Zheng Y, Zhang J, Zuo L. Paeonol Protects Rat Heart by Improving Regional Blood Perfusion during No-Reflow. Front Physiol 2016; 7:298. [PMID: 27493631 PMCID: PMC4954854 DOI: 10.3389/fphys.2016.00298] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 06/28/2016] [Indexed: 01/22/2023] Open
Abstract
No-reflow phenomenon, defined as inadequate perfusion of myocardium without evident artery obstruction, occurs at a high incidence after coronary revascularization. The mechanisms underlying no-reflow is only partially understood. It is commonly caused by the swelling of endothelial cells, neutrophil accumulation, and vasoconstriction, which are all related to acute inflammation. Persistent no-reflow can lead to hospitalization and mortality. However, an effective preventive intervention has not yet been established. We have previously found that paeonol, an active extraction from the root of Paeonia suffruticosa, can benefit the heart function by inhibiting tissue damage after ischemia, reducing inflammation, and inducing vasodilatation. To further investigate the potential cardioprotective action of paeonol on no-reflow, healthy male Wistar rats were randomly divided into four groups: sham, ischemia-reperfusion (I/R) injury (left anterior descending coronary artery was ligated for 4 h followed by reperfusion for 8 h), and I/R injury pretreated with paeonol at two different doses. Real-time myocardial contrast echocardiography was used to monitor regional blood perfusion and cardiac functions. Our data indicated that paeonol treatment significantly reduces myocardial infarct area and no-reflow area (n = 8; p < 0.05). Regional myocardial perfusion (A·β) and cardiac functions such as ejection fraction, stroke volume, and fractional shortening were elevated by paeonol (n = 8; p < 0.05). Paeonol also lowered the serum levels of lactate dehydrogenase, creatine kinase, cardiac troponin T, and C-reactive protein, as indices of myocardial injury. Paeonol exerts beneficial effects on attenuating I/R-associated no-reflow injuries, and may be considered as a potential preventive treatment for cardiac diseases or post-coronary revascularization in which no-reflow often occurs.
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Affiliation(s)
- Lina Ma
- Graduate School, Beijing University of Chinese MedicineBeijing, China; Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical SciencesBeijing, China
| | - Chia-Chen Chuang
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of MedicineColumbus, OH, USA; Interdisciplinary Biophysics Graduate Program, The Ohio State UniversityColumbus, OH, USA
| | - Weiliang Weng
- Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical Sciences Beijing, China
| | - Le Zhao
- Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical Sciences Beijing, China
| | - Yongqiu Zheng
- Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical Sciences Beijing, China
| | - Jinyan Zhang
- Institute of Basic Medical Sciences, Xiyuan Hospital, China Academy of Chinese Medical Sciences Beijing, China
| | - Li Zuo
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of MedicineColumbus, OH, USA; Interdisciplinary Biophysics Graduate Program, The Ohio State UniversityColumbus, OH, USA
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Etheridge T, Szewczyk NJ, Zuo L, Chuang CC, Liu Z, Ward AT, Dier NL, Rotarius TR, Lalande S, Zhang X, Zhang M, Li G, Dong L, Gao F. Commentaries on Viewpoint: A call for research to assess and promote functional resilience in astronaut crews. J Appl Physiol (1985) 2016; 120:473-4. [PMID: 26879659 DOI: 10.1152/japplphysiol.01036.2015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Timothy Etheridge
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Nathaniel J Szewczyk
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Li Zuo
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Chia-Chen Chuang
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Zewen Liu
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - A T Ward
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - N L Dier
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - T R Rotarius
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - S Lalande
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Xing Zhang
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Min Zhang
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Guohua Li
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Ling Dong
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
| | - Feng Gao
- University of ExeterUniversity of NottinghamAssistant ProfessorThe Ohio State University College of MedicineDepartment of Kinesiology University of Toledo, OhioDept. of Aerospace Medicine Fourth Military Medical University
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Shakirzyanova A, Valeeva G, Giniatullin A, Naumenko N, Fulle S, Akulov A, Atalay M, Nikolsky E, Giniatullin R. Age-dependent action of reactive oxygen species on transmitter release in mammalian neuromuscular junctions. Neurobiol Aging 2016; 38:73-81. [DOI: 10.1016/j.neurobiolaging.2015.10.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 10/13/2015] [Accepted: 10/26/2015] [Indexed: 01/01/2023]
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Zuo L, Pannell BK. Redox Characterization of Functioning Skeletal Muscle. Front Physiol 2015; 6:338. [PMID: 26635624 PMCID: PMC4649055 DOI: 10.3389/fphys.2015.00338] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Accepted: 11/02/2015] [Indexed: 12/17/2022] Open
Abstract
Skeletal muscle physiology is influenced by the presence of chemically reactive molecules such as reactive oxygen species (ROS). These molecules regulate multiple redox-sensitive signaling pathways that play a critical role in cellular processes including gene expression and protein modification. While ROS have gained much attention for their harmful effects in muscle fatigue and dysfunction, research has also shown ROS to facilitate muscle adaptation after stressors such as physical exercise. This manuscript aims to provide a comprehensive review of the current understanding of redox signaling in skeletal muscle. ROS-induced oxidative stress and its role in the aging process are discussed. Mitochondria have been shown to generate large amounts of ROS during muscular contractions, and thus are susceptible to oxidative stress. ROS can modify proteins located in the mitochondrial membrane leading to cell death and osmotic swelling. ROS also contribute to the necrosis and inflammation of muscle fibers that is associated with muscular diseases including Duchenne muscular dystrophy. It is imperative that future research continues to investigate the exact role of ROS in normal skeletal muscle function as well as muscular dysfunction and disease.
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Affiliation(s)
- Li Zuo
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine Columbus, OH, USA ; Interdisciplinary Biophysics Graduate Program, The Ohio State University Columbus, OH, USA
| | - Benjamin K Pannell
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine Columbus, OH, USA
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12
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Zuo L, Pannell BK, Re AT, Best TM, Wagner PD. Po2 cycling protects diaphragm function during reoxygenation via ROS, Akt, ERK, and mitochondrial channels. Am J Physiol Cell Physiol 2015; 309:C759-66. [PMID: 26423578 DOI: 10.1152/ajpcell.00174.2015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 09/25/2015] [Indexed: 11/22/2022]
Abstract
Po2 cycling, often referred to as intermittent hypoxia, involves exposing tissues to brief cycles of low oxygen environments immediately followed by hyperoxic conditions. After experiencing long-term hypoxia, muscle can be damaged during the subsequent reintroduction of oxygen, which leads to muscle dysfunction via reperfusion injury. The protective effect and mechanism behind Po2 cycling in skeletal muscle during reoxygenation have yet to be fully elucidated. We hypothesize that Po2 cycling effectively increases muscle fatigue resistance through reactive oxygen species (ROS), protein kinase B (Akt), extracellular signal-regulated kinase (ERK), and certain mitochondrial channels during reoxygenation. Using a dihydrofluorescein fluorescent probe, we detected the production of ROS in mouse diaphragmatic skeletal muscle in real time under confocal microscopy. Muscles treated with Po2 cycling displayed significantly attenuated ROS levels (n = 5; P < 0.001) as well as enhanced force generation compared with controls during reperfusion (n = 7; P < 0.05). We also used inhibitors for signaling molecules or membrane channels such as ROS, Akt, ERK, as well as chemical stimulators to close mitochondrial ATP-sensitive potassium channel (KATP) or open mitochondrial permeability transition pore (mPTP). All these blockers or stimulators abolished improved muscle function with Po2 cycling treatment. This current investigation has discovered a correlation between KATP and mPTP and the Po2 cycling pathway in diaphragmatic skeletal muscle. Thus we have identified a unique signaling pathway that may involve ROS, Akt, ERK, and mitochondrial channels responsible for Po2 cycling protection during reoxygenation conditions in the diaphragm.
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Affiliation(s)
- Li Zuo
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio; Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, Ohio
| | - Benjamin K Pannell
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Anthony T Re
- Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Thomas M Best
- Division of Sports Medicine, Department of Family Medicine, Sports Health and Performance Institute, The Ohio State University, Columbus, Ohio; and
| | - Peter D Wagner
- Department of Medicine, University of California, San Diego, La Jolla, California
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13
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Zuo L, Zhou T, Pannell BK, Ziegler AC, Best TM. Biological and physiological role of reactive oxygen species--the good, the bad and the ugly. Acta Physiol (Oxf) 2015; 214:329-48. [PMID: 25912260 DOI: 10.1111/apha.12515] [Citation(s) in RCA: 269] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 03/27/2015] [Accepted: 04/21/2015] [Indexed: 12/16/2022]
Abstract
Reactive oxygen species (ROS) are chemically reactive molecules that are naturally produced within biological systems. Research has focused extensively on revealing the multi-faceted and complex roles that ROS play in living tissues. In regard to the good side of ROS, this article explores the effects of ROS on signalling, immune response and other physiological responses. To review the potentially bad side of ROS, we explain the consequences of high concentrations of molecules that lead to the disruption of redox homeostasis, which induces oxidative stress damaging intracellular components. The ugly effects of ROS can be observed in devastating cardiac, pulmonary, neurodegenerative and other disorders. Furthermore, this article covers the regulatory enzymes that mitigate the effects of ROS. Glutathione peroxidase, superoxide dismutase and catalase are discussed in particular detail. The current understanding of ROS is incomplete, and it is imperative that future research be performed to understand the implications of ROS in various therapeutic interventions.
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Affiliation(s)
- L. Zuo
- Radiologic Sciences and Respiratory Therapy Division; School of Health and Rehabilitation Sciences; The Ohio State University College of Medicine; Columbus OH USA
- Biophysics Graduate Program; The Ohio State University; Columbus OH USA
| | - T. Zhou
- Radiologic Sciences and Respiratory Therapy Division; School of Health and Rehabilitation Sciences; The Ohio State University College of Medicine; Columbus OH USA
- Biophysics Graduate Program; The Ohio State University; Columbus OH USA
| | - B. K. Pannell
- Radiologic Sciences and Respiratory Therapy Division; School of Health and Rehabilitation Sciences; The Ohio State University College of Medicine; Columbus OH USA
| | - A. C. Ziegler
- Radiologic Sciences and Respiratory Therapy Division; School of Health and Rehabilitation Sciences; The Ohio State University College of Medicine; Columbus OH USA
| | - T. M. Best
- Division of Sports Medicine; Department of Family Medicine; Sports Health & Performance Institute; The Ohio State University Wexner Medical Center; Columbus OH USA
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