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Minuzzi LG, Ferrauti A, Chupel MU, Hacker S, Weyh C, Valenzuela PL, Lucia A, Krüger K, Reichel T. Acute Inflammatory Response to Eccentric Exercise in Young and Master Resistance-trained Athletes. Int J Sports Med 2024. [PMID: 39068934 DOI: 10.1055/a-2348-0238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
This study aimed to compare the acute inflammatory response following high-intensity eccentric exercise between resistance-trained young and master athletes with similar performance levels. Resistance-trained young (n=8; 22±2 years) and master (n=8; 52±4 years) male athletes of a similar performance level performed a standardized high-intensity eccentric squat exercise protocol (10 sets of half-squats at 70% of 1-repetition maximum). The serum concentration of 20 biomarkers related to tissue damage, inflammation, remodeling, and repair was measured at baseline, immediately after exercise, and over a 72 h recovery period. Both groups experienced similar muscle damage as evidenced by a comparable increase in creatine kinase activity 24 h after exercise (p<0.001). Interleukin-6 (p=0.009) and growth hormone (p<0.001) increased immediately post-exercise in both groups. Monocyte chemoattractant protein-1 increased immediately post-exercise only in young athletes (p=0.003) and then decreased 24 h later. There were no significant differences for the remaining variables, including cell markers related to neutrophil/macrophage activation or pro/anti-inflammatory cytokines. Resistance-trained young and master athletes, matched for performance level, showed an overall similar inflammatory response to eccentric exercise, possibly reflecting regulatory mechanisms or immunological adaptations to chronic stimulation in master athletes.
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Affiliation(s)
- Luciele Guerra Minuzzi
- Exercise and Immunometabolism Research Group, Postgraduate Program in Movement Sciences, Department of Physical Education, UNESP Campus de Presidente Prudente, Presidente Prudente, Brazil
- Faculty of Sport Sciences and Physical Education, Research Center for Sport and Physical Activity, University of Coimbra, Coimbra, Portugal
- Department of Exercise Physiology and Sports Therapy, Institute of Sport Science, Justus Liebig University Giessen, Giessen, Germany
| | | | - Matheus Uba Chupel
- Biological Sciences Platform - Hurvitz Brain Sciences, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Sebastian Hacker
- Department of Exercise Physiology and Sports Therapy, Institute of Sport Science, Justus Liebig University Giessen, Giessen, Germany
| | - Christopher Weyh
- Department of Exercise Physiology and Sports Therapy, Institute of Sport Science, Justus Liebig University Giessen, Giessen, Germany
| | - Pedro L Valenzuela
- Department of Systems Biology, Universidad de Alcala de Henares, Madrid, Spain
- Physical Activity and Health Research Group (PaHerg), Research Institute of Hospital 12 de Octubre (imas12), Madrid, Spain
| | - Alejandro Lucia
- Faculty of Sport Sciences, Universidad Europea de Madrid, Madrid, Spain
- Research Institute of the Hospital 12 de Octubre ('imas12'), Madrid, Spain
| | - Karsten Krüger
- Department of Exercise Physiology and Sports Therapy, Institute of Sport Science, Justus Liebig University Giessen, Giessen, Germany
| | - Thomas Reichel
- Department of Exercise Physiology and Sports Therapy, Institute of Sport Science, Justus Liebig University Giessen, Giessen, Germany
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Cornish SM, Cordingley DM. Inflammatory pathway communication with skeletal muscle-Does aging play a role? A topical review of the current evidence. Physiol Rep 2024; 12:e16098. [PMID: 38872451 PMCID: PMC11176593 DOI: 10.14814/phy2.16098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/15/2024] [Accepted: 05/22/2024] [Indexed: 06/15/2024] Open
Abstract
Skeletal muscle plays an integral role in locomotion, but also as part of the integrative physiological system. Recent progress has identified crosstalk between skeletal muscle and various physiological systems, including the immune system. Both the musculoskeletal and immune systems are impacted by aging. Increased age is associated with decreased muscle mass and function, while the immune system undergoes "inflammaging" and immunosenescence. Exercise is identified as a preventative medicine that can mitigate loss of function for both systems. This review summarizes: (1) the inflammatory pathways active in skeletal muscle; and (2) the inflammatory and skeletal muscle response to unaccustomed exercise in younger and older adults. Compared to younger adults, it appears older individuals have a muted pro-inflammatory response and elevated anti-inflammatory response to exercise. This important difference could contribute to decreased regeneration and recovery following unaccustomed exercise in older adults, as well as in chronic disease. The current research provides specific information on the role inflammation plays in altering skeletal muscle form and function, and adaptation to exercise; however, the pursuit of more knowledge in this area will delineate specific interventions that may enhance skeletal muscle recovery and promote resiliency in this tissue particularly with aging.
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Affiliation(s)
- Stephen M Cornish
- Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, Manitoba, Canada
- Applied Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Centre for Aging, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Dean M Cordingley
- Applied Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
- Pan Am Clinic Foundation, Winnipeg, Manitoba, Canada
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Jameson TSO, Caldow MK, Stephens F, Denehy L, Lynch GS, Koopman R, Krajcova A, Urban T, Berney S, Duska F, Puthucheary Z. Inflammation and altered metabolism impede efficacy of functional electrical stimulation in critically ill patients. Crit Care 2023; 27:428. [PMID: 37932834 PMCID: PMC10629203 DOI: 10.1186/s13054-023-04664-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 09/26/2023] [Indexed: 11/08/2023] Open
Abstract
BACKGROUND Critically ill patients suffer from acute muscle wasting, which is associated with significant physical functional impairment. We describe data from nested muscle biopsy studies from two trials of functional electrical stimulation (FES) that did not shown improvements in physical function. METHODS Primary cohort: single-centre randomized controlled trial. Additional healthy volunteer data from patients undergoing elective hip arthroplasty. Validation cohort: Four-centre randomized controlled trial. INTERVENTION FES cycling for 60-90min/day. ANALYSES Skeletal muscle mRNA expression of 223 genes underwent hierarchal clustering for targeted analysis and validation. RESULTS Positively enriched pathways between healthy volunteers and ICU participants were "stress response", "response to stimuli" and "protein metabolism", in keeping with published data. Positively enriched pathways between admission and day 7 ICU participants were "FOXO-mediated transcription" (admission = 0.48 ± 0.94, day 7 = - 0.47 ± 1.04 mean log2 fold change; P = 0.042), "Fatty acid metabolism" (admission = 0.50 ± 0.67, day 7 = 0.07 ± 1.65 mean log2 fold change; P = 0.042) and "Interleukin-1 processing" (admission = 0.88 ± 0.50, day 7 = 0.97 ± 0.76 mean log2 fold change; P = 0.054). Muscle mRNA expression of UCP3 (P = 0.030) and DGKD (P = 0.040) decreased in both cohorts with no between group differences. Changes in IL-18 were not observed in the validation cohort (P = 0.268). Targeted analyses related to intramuscular mitochondrial substrate oxidation, fatty acid oxidation and intramuscular inflammation showed PPARγ-C1α; (P < 0.001), SLC25A20 (P = 0.017) and UCP3 (P < 0.001) decreased between admission and day 7 in both arms. LPIN-1 (P < 0.001) and SPT1 (P = 0.044) decreased between admission and day 7. IL-18 (P = 0.011) and TNFRSF12A (P = 0.009) increased in both arms between admission and day 7. IL-1β (P = 0.007), its receptor IL-1R1 (P = 0.005) and IL-6R (P = 0.001) decreased in both arms between admission and day 7. No between group differences were seen in any of these (all p > 0.05). CONCLUSIONS Intramuscular inflammation and altered substrate utilization are persistent in skeletal muscle during first week of critical illness and are not improved by the application of Functional Electrical Stimulation-assisted exercise. Future trials of exercise to prevent muscle wasting and physical impairment are unlikely to be successful unless these processes are addressed by other means than exercise alone.
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Affiliation(s)
- T S O Jameson
- Nutritional Physiology Group, Department of Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, Devon, UK
| | - M K Caldow
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Melbourne, VIC, Australia
| | - F Stephens
- Nutritional Physiology Group, Department of Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, Devon, UK
| | - L Denehy
- Department of Physiotherapy, School of Health Sciences, The University of Melbourne, Melbourne, Australia
| | - G S Lynch
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Melbourne, VIC, Australia
| | - R Koopman
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Melbourne, VIC, Australia
| | - A Krajcova
- Department of Anaesthesia and Intensive Care Medicine, Third Faculty of Medicine, Charles University, FNKV University Hospital, Srobarova 50, 10034, Prague, Czech Republic
| | - T Urban
- Department of Anaesthesia and Intensive Care Medicine, Third Faculty of Medicine, Charles University, FNKV University Hospital, Srobarova 50, 10034, Prague, Czech Republic
| | - S Berney
- Department of Physiotherapy, School of Health Sciences, The University of Melbourne, Melbourne, Australia
- Department of Physiotherapy Division of Allied, Health Austin Health, Austin, TX, USA
| | - F Duska
- Department of Anaesthesia and Intensive Care Medicine, Third Faculty of Medicine, Charles University, FNKV University Hospital, Srobarova 50, 10034, Prague, Czech Republic.
| | - Z Puthucheary
- William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, London, UK
- Adult Critical Care Unit, Royal London Hospital Barts Health NHS Trust, London, UK
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Saw EL, Werner LD, Zamani P, Chirinos JA, Valero-Muñoz M, Sam F. Skeletal muscle phenotypic switching in heart failure with preserved ejection fraction. Front Cardiovasc Med 2022; 9:1016452. [PMID: 36531739 PMCID: PMC9753550 DOI: 10.3389/fcvm.2022.1016452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/14/2022] [Indexed: 12/03/2022] Open
Abstract
Background Skeletal muscle (SkM) phenotypic switching is associated with exercise intolerance in heart failure with preserved ejection fraction (HFpEF). Patients with HFpEF have decreased type-1 oxidative fibers and mitochondrial dysfunction, indicative of impaired oxidative capacity. The SAUNA (SAlty drinking water/Unilateral Nephrectomy/Aldosterone) mice are commonly used in HFpEF pre-clinical studies and demonstrate cardiac, lung, kidney, and white adipose tissue impairments. However, the SkM (specifically the oxidative-predominant, soleus muscle) has not been described in this preclinical HFpEF model. We sought to characterize the soleus skeletal muscle in the HFpEF SAUNA mice and investigate its translational potential. Methods HFpEF was induced in mice by uninephrectomy, d-aldosterone or saline (Sham) infusion by osmotic pump implantation, and 1% NaCl drinking water was given for 4 weeks. Mice were euthanized, and the oxidative-predominant soleus muscle was collected. We examined fiber composition, fiber cross-sectional area, capillary density, and fibrosis. Molecular analyses were also performed. To investigate the clinical relevance of this model, the oxidative-predominant, vastus lateralis muscle from patients with HFpEF was biopsied and examined for molecular changes in mitochondrial oxidative phosphorylation, vasculature, fibrosis, and inflammation. Results Histological analyses demonstrated a reduction in the abundance of oxidative fibers, type-2A fiber atrophy, decreased capillary density, and increased fibrotic area in the soleus muscle of HFpEF mice compared to Sham. Expression of targets of interest such as a reduction in mitochondrial oxidative-phosphorylation genes, increased VEGF-α and an elevated inflammatory response was also seen. The histological and molecular changes in HFpEF mice are consistent and comparable with changes seen in the oxidative-predominant SkM of patients with HFpEF. Conclusion The HFpEF SAUNA model recapitulates the SkM phenotypic switching seen in HFpEF patients. This model is suitable and relevant to study SkM phenotypic switching in HFpEF.
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Affiliation(s)
- Eng Leng Saw
- Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, United States
| | - Louis Dominic Werner
- Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, United States
| | - Payman Zamani
- Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Julio A. Chirinos
- Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - María Valero-Muñoz
- Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, United States
| | - Flora Sam
- Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, United States,Eli Lilly and Co, Indianapolis, IND, United States,*Correspondence: Flora Sam,
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Circulating Mediators of Apoptosis and Inflammation in Aging; Physical Exercise Intervention. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18063165. [PMID: 33808526 PMCID: PMC8003155 DOI: 10.3390/ijerph18063165] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/13/2021] [Accepted: 03/17/2021] [Indexed: 12/27/2022]
Abstract
Sarcopenia is an age-related loss of skeletal muscle mass caused by many cellular mechanisms and also by lifestyle factors such as low daily physical activity. In addition, it has been shown that sarcopenia may be associated with inflammation and cognitive impairment in old age. Regular exercise is key in reducing inflammation and preventing sarcopenia and diseases related to cognitive impairment. The study was designed to assess the impact of exercise training on circulating apoptotic and inflammatory markers of sarcopenia in older adults. Eighty older adults aged 70.5 ± 5.8 years were randomized to the physically active group who participated in a 10-month Tai-Chi training session (TC, n = 40) and the control group who participated in health education sessions (HE, n = 40). Tai-Chi training caused a significant decrease in fat mass (FM) by 3.02 ± 3.99%, but an increase in appendicular skeletal muscle mass index (ASMI) by 1.76 ± 3.17% and gait speed by 9.07 ± 11.45%. Tai-Chi training elevated the plasma levels of C-reactive protein (CRP), tumor necrosis factor (TNFα), and tumor necrosis receptor factor II (TNFRII), and decreased caspases 8 and 9. Despite the increase in TNFα, apoptosis was not initiated, i.e., the cell-free DNA level did not change in the TC group. The study demonstrated that Tai-Chi training significantly reduced the symptoms of sarcopenia through the changes in body composition and physical performance, and improvements in cytokine-related mechanisms of apoptosis.
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Can Exercise-Induced Muscle Damage Be a Good Model for the Investigation of the Anti-Inflammatory Properties of Diet in Humans? Biomedicines 2021; 9:biomedicines9010036. [PMID: 33466327 PMCID: PMC7824757 DOI: 10.3390/biomedicines9010036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/23/2020] [Accepted: 12/29/2020] [Indexed: 12/25/2022] Open
Abstract
Subclinical, low-grade, inflammation is one of the main pathophysiological mechanisms underlying the majority of chronic and non-communicable diseases. Several methodological approaches have been applied for the assessment of the anti-inflammatory properties of nutrition, however, their impact in human body remains uncertain, because of the fact that the majority of the studies reporting anti-inflammatory effect of dietary patterns, have been performed under laboratory settings and/or in animal models. Thus, the extrapolation of these results to humans is risky. It is therefore obvious that the development of an inflammatory model in humans, by which we could induce inflammatory responses to humans in a regulated, specific, and non-harmful way, could greatly facilitate the estimation of the anti-inflammatory properties of diet in a more physiological way and mechanistically relevant way. We believe that exercise-induced muscle damage (EIMD) could serve as such a model, either in studies investigating the homeostatic responses of individuals under inflammatory stimuli or for the estimation of the anti-inflammatory or pro-inflammatory potential of dietary patterns, foods, supplements, nutrients, or phytochemicals. Thus, in this review we discuss the possibility of exercise-induced muscle damage being an inflammation model suitable for the assessment of the anti-inflammatory properties of diet in humans.
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Bin Y, Xiao Y, Huang D, Ma Z, Liang Y, Bai J, Zhang W, Liang Q, Zhang J, Zhong X, He Z. Theophylline inhibits cigarette smoke-induced inflammation in skeletal muscle by upregulating HDAC2 expression and decreasing NF-κB activation. Am J Physiol Lung Cell Mol Physiol 2019; 316:L197-L205. [PMID: 30358442 DOI: 10.1152/ajplung.00005.2018] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Inflammation is associated with skeletal muscle dysfunction and atrophy in patients with chronic obstructive pulmonary disease (COPD). Theophylline has an anti-inflammatory role in COPD. However, the effects of theophylline on inflammation in skeletal muscle in COPD have rarely been reported. The aims of this study were to explore whether theophylline has an anti-inflammatory effect on skeletal muscle in a mouse model of emphysema and to investigate the molecular mechanism underlying this effect. In mice, cigarette smoke (CS) exposure for 28 wk resulted in atrophy of the gastrocnemius muscle. Histone deacetylase 2 (HDAC2) and nuclear factor-κBp65 (NF-κBp65) mRNA and protein levels were significantly decreased and increased, respectively, in gastrocnemius muscle. This effect was revered by aminophylline. The exposure of murine skeletal muscle C2C12 cells to CS extract (CSE) significantly increased IL-8 and TNF-α levels as well as NF-κBp65 mRNA and protein levels and NF-κBp65 activity. This effect was reversed by theophylline. HDAC2 knockdown enhanced the activity of NF-κBp65 and increased IL-8 and TNF-α levels in C2C12 cells. CSE significantly increased the interaction of HDAC2 with NF-κBp65 in C2C12 cells. These data suggest that theophylline has an anti-inflammatory effect on skeletal muscle in a mouse model of emphysema by upregulating HDAC2 expression and decreasing NF-κBp65 activation.
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Affiliation(s)
- Yanfei Bin
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Ying Xiao
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Dongmei Huang
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhiying Ma
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yi Liang
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jing Bai
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wenlu Zhang
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Qiuli Liang
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jianquan Zhang
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xiaoning Zhong
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhiyi He
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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9
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Age and sex differences in human skeletal muscle fibrosis markers and transforming growth factor-β signaling. Eur J Appl Physiol 2017; 117:1463-1472. [PMID: 28493029 DOI: 10.1007/s00421-017-3639-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 05/04/2017] [Indexed: 01/01/2023]
Abstract
PURPOSE The aim of the study was to determine whether higher fibrosis markers in skeletal muscle of older adults are accompanied by increased expression of components of the canonical TGF-β signal transduction pathway. METHODS Fourteen healthy young (21-35 years; 9 males and 5 females) and seventeen older (55-75 years; 9 males and 8 females) participants underwent vastus lateralis biopsies to determine intramuscular mRNA and protein expression of fibrogenic markers and TGF-β signaling molecules related to TGF-β1 and myostatin. RESULTS Expression of mRNA encoding the pro-fibrotic factors; axin 2, collagen III, β-catenin and fibronectin, were all significantly higher (all p < 0.05) in the older participants (350, 170, 298, and 641%, respectively). Furthermore, axin 2 and β-catenin mRNA were significantly higher in older females than older males (p < 0.05). Gene expression of ActRIIB, myostatin, and TGF-β1 were higher in older adults compared to younger adults (all p < 0.05). There was, however, no difference in the total protein content of myostatin, myoD or myogenin (all p > 0.05), whereas Smad3 protein phosphorylation was 48% lower (p < 0.05) in muscle from older adults. CONCLUSIONS Increased abundance of mRNA of fibrotic markers was observed in muscle from older adults and was partly accompanied by altered abundance of pro-fibrotic ligands in a sex specific manner.
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Pestronk A, Keeling R, Choksi R. Sarcopenia, age, atrophy, and myopathy: Mitochondrial oxidative enzyme activities. Muscle Nerve 2017; 56:122-128. [PMID: 27759889 DOI: 10.1002/mus.25442] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2016] [Indexed: 12/21/2022]
Abstract
INTRODUCTION We studied mitochondrial impairment as a factor in the pathologic equivalent of sarcopenia, muscle fiber atrophy associated with increased age. METHODS Mitochondrial oxidative enzyme activities and coenzyme Q10 levels were measured in frozen human proximal limb muscles with combined age and atrophy, age alone, atrophy alone, denervation, immune myopathies, and mitochondrial disorders with ophthalmoplegia. RESULTS Sarcopenia (age and atrophy) had reduced mean activities of mitochondrial Complexes I, II, and II+III, with severe reduction of Complex I activity in 54% of patients. Atrophy, and specific denervation atrophy, had similar patterns of changes. Age alone had moderately reduced Complex I activity. Mitochondrial myopathies had mildly lower Complex IV activity. Immune myopathies had unchanged enzyme activities. CONCLUSIONS Mitochondrial oxidative enzyme activities, especially Complex I, but also Complexes II and II+III, are reduced in muscles with the pathologic equivalent of sarcopenia. Individually, atrophy and age have different patterns of oxidative enzyme changes. Muscle Nerve 56: 122-128, 2017.
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Affiliation(s)
- Alan Pestronk
- Department of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Box 8111, Saint Louis, Missouri, 63110, USA.,Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Richard Keeling
- Department of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Box 8111, Saint Louis, Missouri, 63110, USA
| | - Rati Choksi
- Department of Neurology, Washington University School of Medicine, 660 South Euclid Avenue, Box 8111, Saint Louis, Missouri, 63110, USA
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McKenzie AI, Briggs RA, Barrows KM, Nelson DS, Kwon OS, Hopkins PN, Higgins TF, Marcus RL, Drummond MJ. A pilot study examining the impact of exercise training on skeletal muscle genes related to the TLR signaling pathway in older adults following hip fracture recovery. J Appl Physiol (1985) 2016; 122:68-75. [PMID: 27789770 DOI: 10.1152/japplphysiol.00714.2016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/12/2016] [Accepted: 10/24/2016] [Indexed: 12/18/2022] Open
Abstract
Older adults after hip fracture surgery experience progressive muscle atrophy and weakness, limiting full recovery. Further understanding of the molecular mechanisms in muscle with adaptation to exercise training in this vulnerable population is necessary. Therefore, we conducted a pilot study to investigate the skeletal muscle inflammatory and ceramide biosynthesis gene expression levels associated with the toll-like receptor (TLR) pathway before (Pre) and following a 3-mo multicomponent exercise training program in older adults (3M, 4F; 78.4 ± 13.3 yr; 25.5 ± 2.3 kg/m2) ~4 mo after repair from hip fracture (HipFx). Vastus lateralis biopsies from the surgical limb were obtained before (Pre) and after training. Molecular end points and muscle function data were also compared with matched nonexercise healthy controls (CON). As a follow-up analysis, we evaluated specific sphingolipid pools in HipFx and CON muscle. Following training, quadriceps cross-sectional area, strength, and 6-min walk (6MW) increased in the surgical limb (P < 0.05). Additionally, MYD88, TAK1, NFKB1, IL6, SPT2, and CERS1 gene expression decreased after training (P ≤ 0.05), but some remained elevated above CON levels. Interestingly, MYD88 mRNA was inversely correlated to quadriceps CSA, strength, and 6MW. Finally, muscle dihydroceramides and phosphoceramides in HipFx were lower than CON at Pre (P ≤ 0.05), but after training differences from CON were removed. Together, our pilot data support that exercise training alters skeletal muscle inflammation and ceramide metabolism associated with TLR signaling in older adults recovering from hip fracture surgery and may be related to improvements in muscle function recovery. NEW & NOTEWORTHY These pilot data demonstrate that 3 mo of exercise training in older adults recovering from hip fracture surgery was able to mitigate skeletal muscle gene expression related to inflammation and ceramide metabolism while also improving surgical limb lean tissue, strength, and physical function.
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Affiliation(s)
- Alec I McKenzie
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah
| | - Robert A Briggs
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah
| | - Katherine M Barrows
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah
| | - Daniel S Nelson
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Oh Sung Kwon
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah
| | - Paul N Hopkins
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, Utah; and
| | - Thomas F Higgins
- Department of Orthopaedics, University of Utah, Salt Lake City, Utah
| | - Robin L Marcus
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah
| | - Micah J Drummond
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah; .,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah.,Division of Diabetes, Metabolism and Endocrinology, University of Utah, Salt Lake City, Utah
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Sokoloff AJ, Douglas M, Rahnert JA, Burkholder T, Easley KA, Luo Q. Absence of morphological and molecular correlates of sarcopenia in the macaque tongue muscle styloglossus. Exp Gerontol 2016; 84:40-48. [PMID: 27566374 DOI: 10.1016/j.exger.2016.08.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 08/18/2016] [Accepted: 08/22/2016] [Indexed: 01/06/2023]
Abstract
INTRODUCTION Equivocal decline of tongue muscle performance with age is compatible with resistance of the tongue to sarcopenia, the loss of muscle volume and function that typically occurs with aging. To test this possibility we characterized anatomical and molecular indices of sarcopenia in the macaque tongue muscle styloglossus (SG). METHODS We quantified myosin heavy chain (MHC), muscle fiber MHC phenotype and size and total and phosphorylated growth- and atrophy-related proteins by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), immunoblot and immunohistochemistry (IHC) in the SG in twenty-four macaque monkeys (Macaca rhesus, age range 9months to 31years) categorized into Young (<8years of age), Middle-aged (15-21years of age) and Old (>22years of age) groups. RESULTS In Young, Middle and Old age groups, by SDS-PAGE MHCI comprised ~1/3 and MHCII ~2/3 of total MHC. MHCI relative frequency was lower and MHCII higher in Middle versus Young (p=0.0099) and Middle versus Old (p=0.052). Relative frequencies of MHC fiber phenotype were not different by age but were different by phenotype (rates 233, 641 and 111 per 1000 fibers for MHCI, MHCII and MHCI-II respectively, p=0.03). Few or no fibers were positive for developmental MHC. Mean cross-sectional area (CSA) was not different among the three age groups for MHCII and MHCI-II; however MHCI fibers tended to be larger in Middle versus Old and Young (mean=2257μm2,1917μm2 (p=0.05) and 1704μm2 (p=0.06), respectively). For each age group, mean CSA increased across MHC phenotype (lowest mean CSA for MHCI and highest mean CSA for MHCII). Spearman analysis demonstrated age-related increases in total p70 ribosomal protein S6 kinase (P70), phosphorylated P70421/424, phosphorylated P38 mitogen-activated protein kinase and muscle atrophy F-Box, a trend to age-related decrease in total extracellular signal-regulated kinase (ERK), and no age-related change in total protein kinase B (Akt/PKB), phosphorylated Akt, phosphorylated ERK, phosphorylated c-Jun N-terminal kinase (JNK46) and phosphorylated P70389. CONCLUSION Common anatomical and molecular indices of sarcopenia are absent in our sample of macaque SG. Relative frequencies of MHCII protein and phenotype are preserved with age. Although MAFbx expression increases with age, this is not associated with fiber atrophy, perhaps reflecting compensatory growth signaling by p70. The resistant nature of the styloglossus muscle to sarcopenia may be related to routine activation of tongue muscles in respiration and swallowing and the preservation of hypoglossal motoneuron number with age.
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Affiliation(s)
- Alan J Sokoloff
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, United States.
| | - Megan Douglas
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, United States
| | - Jill A Rahnert
- School of Applied Physiology, Georgia Institute of Technology, Atlanta, GA, United States
| | - Thomas Burkholder
- School of Applied Physiology, Georgia Institute of Technology, Atlanta, GA, United States
| | - Kirk A Easley
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, United States
| | - Qingwei Luo
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, United States
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Caldow MK, Thomas EE, Dale MJ, Tomkinson GR, Buckley JD, Cameron-Smith D. Early myogenic responses to acute exercise before and after resistance training in young men. Physiol Rep 2015; 3:e12511. [PMID: 26359239 PMCID: PMC4600377 DOI: 10.14814/phy2.12511] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 07/27/2015] [Indexed: 11/24/2022] Open
Abstract
To enable dynamic regulation of muscle mass and myofiber repair following injury, a satellite cell precursor population exists to supply additional nuclei. Activated satellite cells express many genes and associated proteins necessary for maturation and incorporation into the damaged fiber. There is little knowledge about the response of these markers following whole-body resistance exercise training. We investigated the impact of 12 weeks of progressive whole-body resistance training on the expression of MRFs, PAX7, NCAM, and FA1, incorporating both acute and chronic resistance exercise components. Ten young recreationally active males (21.2 ± 3.5 years) performed 12 weeks of whole-body resistance training at 70-85% of their predetermined one-repetition maximum (1RM). At the initiation and completion of the training period, muscular strength was assessed by RM and dynamometer testing, and vastus lateralis samples were obtained prior to and 3 h following an acute resistance exercise test (both whole-body and isometric exercises). Increased mRNA expression of PAX7 (threefold), NCAM (threefold), MYF5 (threefold), MYOD (threefold) and MYOGENIN (twofold) was observed 3 h after the acute resistance exercise test, both pre and posttraining. Similarly, PAX7 (11-fold) and FA1 (twofold) protein abundance increased after acute exercise, while resting NCAM (eightfold) and FA1 (threefold) protein abundance increased following 12 weeks of resistance training. It is possible that these molecular changes are primarily due to the preceding exercise bout, and are not modified by long-term or whole-body exercise training.
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Affiliation(s)
- Marissa K Caldow
- Molecular Nutrition Unit, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia Basic and Clinical Myology Laboratory, Department of Physiology, University of Melbourne, Melbourne, Australia
| | - Emily E Thomas
- Molecular Nutrition Unit, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia
| | - Michael J Dale
- School of Health Sciences, University of South Australia, Adelaide, Australia
| | - Grant R Tomkinson
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), School of Health Sciences and the Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia
| | - Jonathan D Buckley
- Alliance for Research in Exercise, Nutrition and Activity (ARENA), School of Health Sciences and the Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia
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Ghosh S, Lertwattanarak R, Garduño JDJ, Galeana JJ, Li J, Zamarripa F, Lancaster JL, Mohan S, Hussey S, Musi N. Elevated muscle TLR4 expression and metabolic endotoxemia in human aging. J Gerontol A Biol Sci Med Sci 2015; 70:232-46. [PMID: 24846769 PMCID: PMC4311182 DOI: 10.1093/gerona/glu067] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 04/07/2014] [Indexed: 12/25/2022] Open
Abstract
Aging is associated with alterations in glucose metabolism and sarcopenia that jointly contribute to a higher risk of developing type 2 diabetes. Because aging is considered as a state of low-grade inflammation, in this study we examined whether older, healthy (lean, community-dwelling) participants have altered signaling flux through toll-like receptor 4 (TLR4), a key mediator of innate and adaptive immune responses. We also examined whether a 4-month aerobic exercise program would have an anti-inflammatory effect by reducing TLR4 expression and signaling. At baseline, muscle TLR4, nuclear factor κB p50 and nuclear factor κB p65 protein content, and c-Jun N-terminal kinase phosphorylation were significantly elevated in older versus young participants. The plasma concentration of the TLR4 agonist lipopolysaccharide and its binding protein also were significantly elevated in older participants, indicative of metabolic endotoxemia, which is a recently described phenomenon of increased plasma endotoxin level in metabolic disease. These alterations in older participants were accompanied by decreased insulin sensitivity, quadriceps muscle volume, and muscle strength. The exercise training program increased insulin sensitivity, without affecting quadriceps muscle volume or strength. Muscle TLR4, nuclear factor κB, and c-Jun N-terminal kinase, and plasma lipopolysaccharide and lipopolysaccharide binding protein were not changed by exercise. In conclusion, insulin resistance and sarcopenia of aging are associated with increased TLR4 expression/signaling, which may be secondary to metabolic endotoxemia.
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Affiliation(s)
- Sangeeta Ghosh
- Geriatric Research, Education and Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio. Barshop Institute for Longevity and Aging Studies, Center for Healthy Aging
| | | | | | | | | | | | | | - Sumathy Mohan
- Department of Pathology, University of Texas Health Science Center, San Antonio
| | - Sophie Hussey
- Geriatric Research, Education and Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio. Barshop Institute for Longevity and Aging Studies, Center for Healthy Aging
| | - Nicolas Musi
- Geriatric Research, Education and Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio. Barshop Institute for Longevity and Aging Studies, Center for Healthy Aging,
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Addison O, Drummond MJ, LaStayo PC, Dibble LE, Wende AR, McClain DA, Marcus RL. Intramuscular fat and inflammation differ in older adults: the impact of frailty and inactivity. J Nutr Health Aging 2014; 18:532-8. [PMID: 24886741 PMCID: PMC6639009 DOI: 10.1007/s12603-014-0019-1] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECTIVES Intramuscular adipose tissue (IMAT) is recognized as a negative predictor of both muscle and mobility function in older adults, however the mechanism by which IMAT may negatively influence muscle and mobility function is currently unknown. The release of pro-inflammatory cytokines from IMAT provides a potential reason for these negative associations. To explore this hypothesis we compared IMAT and muscular inflammation in age-and BMI-matched older non-obese frail and non-frail adults. We also sought to examine the relationship between IMAT and inflammation, and muscle and mobility function in this group of older adults. DESIGN A case-control sampling was used for this study. Age-and BMI-matched non-obese frail and non-frail individuals (<65 years) were recruited. MEASUREMENTS MRI was used to quantify thigh IMAT and lean tissue. Unilateral muscle biopsies were used to quantify muscular inflammation as represented by interleukin-6 (IL-6) and tumor-necrosis factor alpha (TNF-α). Muscle and mobility function was also measured using a maximal voluntary isometric contraction, six-minute walk, and self-selected gait speed. PARTICIPANTS 26 older (80.7 +/- 5.4 years) individuals (8 frail and 18 non-frail) were enrolled. RESULTS The frail-group had increased IMAT (p<0.01) and decreased lean tissue (p<0.01), and elevated IL-6 muscle mRNA (p=0.02) and IL-6 protein content (p=0.02) compared to the non-frail group. IMAT was significantly associated with IL-6 mRNA (r=0.43, p=.04) and protein expression within the muscle (r=0.41, p= 0.045). IL-6 mRNA was significantly associated with six-minute walk (r=-0.63, p<0.01), and gait speed (r=-0.60, p <0.01) and IL-6 protein was significantly associated with muscle force (r=-0.54, p=0.01), six-minute walk (r=-0.66, p<0.01), and gait speed (r=-0.76, p<0.01). No significant relationships were found for any variables with TNF-a. CONCLUSION Non-obese, older, frail individuals have increased IMAT and muscular inflammation when compared to their non-frail, age- and BMI-matched peers. A significant relationship exists between IMAT and muscle IL-6 expression as well as between IL-6 and muscle and mobility function of these older adults. This IMAT-inflammatory pathway provides a potential link between IMATs and decreased muscle and mobility function.
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Affiliation(s)
- O Addison
- Odessa Addison, DPT, PhD, 10 North Green Street, BT/18/GRECC, Baltimore, MD 21201, , Phone: (410)605-7000 ext 5393, Fax: (410)-605-7185
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Trappe TA, Liu SZ. Effects of prostaglandins and COX-inhibiting drugs on skeletal muscle adaptations to exercise. J Appl Physiol (1985) 2013; 115:909-19. [PMID: 23539318 DOI: 10.1152/japplphysiol.00061.2013] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
It has been ∼40 yr since the discovery that PGs are produced by exercising skeletal muscle and since the discovery that inhibition of PG synthesis is the mechanism of action of what are now known as cyclooxygenase (COX)-inhibiting drugs. Since that time, it has been established that PGs are made during and after aerobic and resistance exercise and have a potent paracrine and autocrine effect on muscle metabolism. Consequently, it has also been determined that orally consumed doses of COX inhibitors can profoundly influence muscle PG synthesis, muscle protein metabolism, and numerous other cellular processes that regulate muscle adaptations to exercise loading. Although data from acute human exercise studies, as well as animal and cell-culture data, would predict that regular consumption of a COX inhibitor during exercise training would dampen the typical muscle adaptations, the chronic data do not support this conjecture. From the studies in young and older individuals, lasting from 1.5 to 4 mo, no interfering effects of COX inhibitors on muscle adaptations to resistance-exercise training have been noted. In fact, in older individuals, a substantial enhancement of muscle mass and strength has been observed. The collective findings of the PG/COX-pathway regulation of skeletal muscle responses and adaptations to exercise are compelling. Considering the discoveries in other areas of COX regulation of health and disease, there is certainly an interesting future of investigation in this re-emerging area, especially as it pertains to older individuals and the condition of sarcopenia, as well as exercise training and performance of individuals of all ages.
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Affiliation(s)
- Todd A Trappe
- Human Performance Laboratory, Ball State University, Muncie, Indiana
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