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Stevens NE, Loreti M, Ramirez-Sanchez I, Dos Reis FCG, Sacco A, Breen EC, Nogueira L. Cigarette smoke exposure impairs early-stage recovery from lengthening contraction-induced muscle injury in male mice. Physiol Rep 2024; 12:e70064. [PMID: 39328164 PMCID: PMC11427903 DOI: 10.14814/phy2.70064] [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: 05/04/2024] [Revised: 09/05/2024] [Accepted: 09/15/2024] [Indexed: 09/28/2024] Open
Abstract
The use of tobacco cigarettes produces locomotor muscle weakness and fatigue intolerance. Also, smokers and chronic obstructive pulmonary disease patients have a greater incidence of muscle injury and a deficient myogenic response. However, the effects of smoke exposure on the recovery from eccentric exercise-induced muscle injuries are unknown. Mice were exposed daily to cigarette smoke (CS) or room air (Air) for 4 months; the anterior crural muscles from one limb were injured by a lengthening contractions protocol (LCP) and recovered for 7 days. Lung compliance was greater, and body weights were lower, in CS-exposed than in the Air group. In LCP-subjected limbs, CS exposure lowered tibialis anterior myofiber cross-sectional area, decreased the size of centrally nucleated myofibers, and decreased extensor digitorum longus (EDL) mass, but did not affect EDL force from both limbs. CS exposure upregulated the mRNA levels of several myogenic (Pax7, Myf5, nNOS) genes in the EDL. The combination of CS exposure and LCP decreased Myf5 and nNOS mRNA levels and exacerbated pro-inflammatory mRNA levels. These data suggest that smoke exposure leads to an excessive pro-inflammatory response in regenerating muscle that is associated with a lower muscle mass recovery from a type of injury that often occurs during strenuous exercise.
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Affiliation(s)
- Nicole E Stevens
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Mafalda Loreti
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Israel Ramirez-Sanchez
- Division of Cardiovascular Medicine, Department of Medicine, University of California San Diego, La Jolla, California, USA
- Seccion de Estudios de Posgrado e Investigacion, Escuela Superior de Medicina, IPN, Mexico City, Mexico
| | - Felipe C G Dos Reis
- Division of Endocrinology and Metabolism, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Alessandra Sacco
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Ellen C Breen
- Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Leonardo Nogueira
- School of Exercise and Nutritional Sciences, College of Health and Human Services, San Diego State University, San Diego, California, USA
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2
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Simovic T, Matheson C, Cobb K, Heefner A, Thode C, Colon M, Tunon E, Billingsley H, Salmons H, Ahmed SI, Carbone S, Garten R, Breland A, Cobb CO, Nana-Sinkam P, Rodriguez-Miguelez P. Young users of electronic cigarettes exhibit reduced cardiorespiratory fitness. J Appl Physiol (1985) 2024; 137:569-580. [PMID: 38990977 PMCID: PMC11424176 DOI: 10.1152/japplphysiol.00292.2024] [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: 04/18/2024] [Revised: 07/10/2024] [Accepted: 07/10/2024] [Indexed: 07/13/2024] Open
Abstract
Electronic nicotine delivery systems, often referred to as e-cigarettes, are popular tobacco products frequently advertised as safer alternatives to traditional cigarettes despite preliminary data suggesting a potential negative cardiovascular impact. Cardiorespiratory fitness is a critical cardiovascular health marker that is diminished in individuals who consume traditional tobacco products. Whether the use of e-cigarettes impacts cardiorespiratory fitness is currently unknown. Thus, the purpose of this study was to investigate the impact of regular e-cigarette use on cardiorespiratory fitness in young healthy adults. Twenty-six users of e-cigarettes (ECU, 13 males, and 13 females; age: 24 ± 3 yr; e-cigarette usage 4 ± 2 yr) and 16 demographically matched nonusers (NU, 6 males, and 10 females; age: 23 ± 3 yr) participated in this study. Cardiorespiratory fitness was measured by peak oxygen consumption (V̇o2peak) during a cardiopulmonary exercise test. Measurements of chronotropic response, hemodynamic, oxygen extraction, and utilization were also evaluated. Our results suggest that regular users of e-cigarettes exhibited significantly lower peak oxygen consumption when compared with nonusers, even when controlled by fat-free mass and lean body mass. Hemodynamic changes were not different between both groups during exercise, whereas lower chronotropic responses and skeletal muscle oxygen utilization were observed in users of e-cigarettes. Results from the present study demonstrate that young, apparently healthy, regular users of e-cigarettes exhibit significantly reduced cardiorespiratory fitness, lower chronotropic response, and impaired skeletal muscle oxygen utilization during exercise. Overall, our findings contribute to the growing body of evidence that supports adverse effects of regular e-cigarette use on cardiovascular health.NEW & NOTEWORTHY E-cigarettes are tobacco products frequently used by youth and young adults. Little is known about the long-term health effects of their prolonged use. Results from the present study demonstrate that young, apparently healthy, regular users of e-cigarettes exhibit significantly reduced cardiorespiratory fitness, a marker of cardiovascular health and a predictor of all-cause mortality. We also identified that the young users of e-cigarettes present with lower chronotropic response and impaired skeletal muscle oxygen utilization during exercise.
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Affiliation(s)
- Tijana Simovic
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Chloe Matheson
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Kolton Cobb
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Allison Heefner
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
- School of Medicine, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Christopher Thode
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Marisa Colon
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Enrique Tunon
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Hayley Billingsley
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Hannah Salmons
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Syed Imran Ahmed
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Salvatore Carbone
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Ryan Garten
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Alison Breland
- Department of Psychology, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Caroline O Cobb
- Department of Psychology, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Patrick Nana-Sinkam
- Division of Pulmonary and Critical Care, Virginia Commonwealth University, Richmond, Virginia, United States
| | - Paula Rodriguez-Miguelez
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, Virginia, United States
- Division of Pulmonary and Critical Care, Virginia Commonwealth University, Richmond, Virginia, United States
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3
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Aid J, Tanjeko AT, Serré J, Eggelbusch M, Noort W, de Wit GMJ, van Weeghel M, Puurand M, Tepp K, Gayan-Ramirez G, Degens H, Käämbre T, Wüst RCI. Smoking cessation only partially reverses cardiac metabolic and structural remodeling in mice. Acta Physiol (Oxf) 2024; 240:e14145. [PMID: 38647279 DOI: 10.1111/apha.14145] [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: 11/03/2023] [Revised: 02/09/2024] [Accepted: 03/31/2024] [Indexed: 04/25/2024]
Abstract
AIMS Active cigarette smoking is a major risk factor for chronic obstructive pulmonary disease that remains elevated after cessation. Skeletal muscle dysfunction has been well documented after smoking, but little is known about cardiac adaptations to cigarette smoking. The underlying cellular and molecular cardiac adaptations, independent of confounding lifestyle factors, and time course of reversibility by smoking cessation remain unclear. We hypothesized that smoking negatively affects cardiac metabolism and induces local inflammation in mice, which do not readily reverse upon 2-week smoking cessation. METHODS Mice were exposed to air or cigarette smoke for 14 weeks with or without 1- or 2-week smoke cessation. We measured cardiac mitochondrial respiration by high-resolution respirometry, cardiac mitochondrial density, abundance of mitochondrial supercomplexes by electrophoresis, and capillarization, fibrosis, and macrophage infiltration by immunohistology, and performed cardiac metabolome and lipidome analysis by mass spectrometry. RESULTS Mitochondrial protein, supercomplex content, and respiration (all p < 0.03) were lower after smoking, which were largely reversed within 2-week smoking cessation. Metabolome and lipidome analyses revealed alterations in mitochondrial metabolism, a shift from fatty acid to glucose metabolism, which did not revert to control upon smoking cessation. Capillary density was not different after smoking but increased after smoking cessation (p = 0.02). Macrophage infiltration and fibrosis (p < 0.04) were higher after smoking but did not revert to control upon smoking cessation. CONCLUSIONS While cigarette-impaired smoking-induced cardiac mitochondrial function was reversed by smoking cessation, the remaining fibrosis and macrophage infiltration may contribute to the increased risk of cardiovascular events after smoking cessation.
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Affiliation(s)
- Jekaterina Aid
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
- Laboratory of Myology, Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Ajime Tom Tanjeko
- Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Diseases, and Metabolism, KU-Leuven, Leuven, Belgium
- Department of Life Sciences, Institute of Sport, Manchester Metropolitan University, Manchester, UK
| | - Jef Serré
- Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Diseases, and Metabolism, KU-Leuven, Leuven, Belgium
| | - Moritz Eggelbusch
- Laboratory of Myology, Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Wendy Noort
- Laboratory of Myology, Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Gerard M J de Wit
- Laboratory of Myology, Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Michel van Weeghel
- Laboratory Genetic Metabolic Diseases, Amsterdam UMC, Amsterdam Gastroenterology and Metabolism, Amsterdam Cardiovascular Sciences, University of Amsterdam, Amsterdam, The Netherlands
- Core Facility Metabolomics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Marju Puurand
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Kersti Tepp
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Ghislaine Gayan-Ramirez
- Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Diseases, and Metabolism, KU-Leuven, Leuven, Belgium
| | - Hans Degens
- Department of Life Sciences, Institute of Sport, Manchester Metropolitan University, Manchester, UK
- Institute of Sport Science and Innovations, Lithuanian Sports University, Kaunas, Lithuania
| | - Tuuli Käämbre
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Rob C I Wüst
- Laboratory of Myology, Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Fitzgerald LF, Lackey J, Moussa A, Shah SV, Castellanos AM, Khan S, Schonk M, Thome T, Salyers ZR, Jakkidi N, Kim K, Yang Q, Hepple RT, Ryan TE. Chronic aryl hydrocarbon receptor activity impairs muscle mitochondrial function with tobacco smoking. J Cachexia Sarcopenia Muscle 2024; 15:646-659. [PMID: 38333944 PMCID: PMC10995249 DOI: 10.1002/jcsm.13439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 11/21/2023] [Accepted: 01/14/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND Accumulating evidence has demonstrated that chronic tobacco smoking directly contributes to skeletal muscle dysfunction independent of its pathological impact to the cardiorespiratory systems. The mechanisms underlying tobacco smoke toxicity in skeletal muscle are not fully resolved. In this study, the role of the aryl hydrocarbon receptor (AHR), a transcription factor known to be activated with tobacco smoke, was investigated. METHODS AHR related gene (mRNA) expression was quantified in skeletal muscle from adult controls and patients with chronic obstructive pulmonary disease (COPD), as well as mice with and without cigarette smoke exposure. Utilizing both skeletal muscle-specific AHR knockout mice exposed to chronic repeated (5 days per week for 16 weeks) cigarette smoke and skeletal muscle-specific expression of a constitutively active mutant AHR in healthy mice, a battery of assessments interrogating muscle size, contractile function, mitochondrial energetics, and RNA sequencing were employed. RESULTS Skeletal muscle from COPD patients (N = 79, age = 67.0 ± 8.4 years) had higher levels of AHR (P = 0.0451) and CYP1B1 (P < 0.0001) compared to healthy adult controls (N = 16, age = 66.5 ± 6.5 years). Mice exposed to cigarette smoke displayed higher expression of Ahr (P = 0.008), Cyp1b1 (P < 0.0001), and Cyp1a1 (P < 0.0001) in skeletal muscle compared to air controls. Cigarette smoke exposure was found to impair skeletal muscle mitochondrial oxidative phosphorylation by ~50% in littermate controls (Treatment effect, P < 0.001), which was attenuated by deletion of the AHR in muscle in male (P = 0.001), but not female, mice (P = 0.37), indicating there are sex-dependent pathological effects of smoking-induced AHR activation in skeletal muscle. Viral mediated expression of a constitutively active mutant AHR in the muscle of healthy mice recapitulated the effects of cigarette smoking by decreasing muscle mitochondrial oxidative phosphorylation by ~40% (P = 0.003). CONCLUSIONS These findings provide evidence linking chronic AHR activation secondary to cigarette smoke exposure to skeletal muscle bioenergetic deficits in male, but not female, mice. AHR activation is a likely contributor to the decline in muscle oxidative capacity observed in smokers and AHR antagonism may provide a therapeutic avenue aimed to improve muscle function in COPD.
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Affiliation(s)
| | - Jacob Lackey
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Ahmad Moussa
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Sohan V. Shah
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
| | - Ana Maria Castellanos
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Shawn Khan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Martin Schonk
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
| | - Trace Thome
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Zachary R. Salyers
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Nishka Jakkidi
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Kyoungrae Kim
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Qingping Yang
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Russell T. Hepple
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
- Myology InstituteUniversity of FloridaGainesvilleFLUSA
| | - Terence E. Ryan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
- Myology InstituteUniversity of FloridaGainesvilleFLUSA
- Center for Exercise Science, University of FloridaGainesvilleFLUSA
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5
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Fan RF, Chen XW, Cui H, Fu HY, Xu WX, Li JZ, Lin H. Selenoprotein K knockdown induces apoptosis in skeletal muscle satellite cells via calcium dyshomeostasis-mediated endoplasmic reticulum stress. Poult Sci 2023; 102:103053. [PMID: 37716231 PMCID: PMC10507440 DOI: 10.1016/j.psj.2023.103053] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/17/2023] [Accepted: 08/17/2023] [Indexed: 09/18/2023] Open
Abstract
Skeletal muscle satellite cells (SMSCs), known as muscle stem cells, play an important role in muscle embryonic development, post-birth growth, and regeneration after injury. Selenoprotein K (SELENOK), an endoplasmic reticulum (ER) resident selenoprotein, is known to regulate calcium ion (Ca2+) flux and ER stress (ERS). SELENOK deficiency is involved in dietary selenium deficiency-induced muscle injury, but the regulatory mechanisms of SELENOK in SMSCs development remain poorly explored in chicken. Here, we established a SELENOK deficient model to explore the role of SELENOK in SMSCs. SELENOK knockdown inhibited SMSCs proliferation and differentiation by regulating the protein levels of paired box 7 (Pax7), myogenic factor 5 (Myf5), CyclinD1, myogenic differentiation (MyoD), and Myf6. Further analysis exhibited that SELENOK knockdown markedly activated the ERS signaling pathways, which ultimately induced apoptosis in SMSCs. SELENOK knockdown-induced ERS is related with ER Ca2+ ([Ca2+]ER) overload via decreasing the protein levels of STIM2, Orai1, palmitoylation of inositol 1,4,5-trisphosphate receptor 1 (IP3R1), phospholamban (PLN), and plasma membrane Ca2+-ATPase (PMCA) while increasing the protein levels of sarco/endoplasmic Ca2+-ATPase 1 (SERCA1) and Na+/Ca2+ exchanger 1 (NCX1). Moreover, thimerosal, an activator of IP3R1, reversed the overload of [Ca2+]ER, ERS, and subsequent apoptosis caused by SELENOK knockdown. These findings indicated that SELENOK knockdown triggered ERS driven by intracellular Ca2+ dyshomeostasis and further induced apoptosis, which ultimately inhibited SMSCs proliferation and differentiation.
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Affiliation(s)
- Rui-Feng Fan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China
| | - Xue-Wei Chen
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China
| | - Han Cui
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China
| | - Hong-Yu Fu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China
| | - Wan-Xue Xu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China
| | - Jiu-Zhi Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China
| | - Hai Lin
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China; State Key Laboratory of Crop Biology, College of Life Sciences, 61 Daizong Street, Tai'an City, Shandong Province, 271018, China.
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6
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Li L, Huang C, Pang J, Huang Y, Chen X, Chen G. Advances in research on cell models for skeletal muscle atrophy. Biomed Pharmacother 2023; 167:115517. [PMID: 37738794 DOI: 10.1016/j.biopha.2023.115517] [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: 07/06/2023] [Revised: 09/07/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023] Open
Abstract
Skeletal muscle, the largest organ in the human body, plays a crucial role in supporting and defending the body and is essential for movement. It also participates in regulating the processes of protein synthesis and degradation. Inhibition of protein synthesis and activation of degradation metabolism can both lead to the development of skeletal muscle atrophy, a pathological condition characterized by a decrease in muscle mass and fiber size. Many physiological and pathological conditions can cause a decline in muscle mass, but the underlying mechanisms of its pathogenesis remain incompletely understood, and the selection of treatment strategies and efficacy evaluations vary. Moreover, the early symptoms of this condition are often not apparent, making it easily overlooked in clinical practice. Therefore, it is necessary to develop and use cell models to understand the etiology and influencing factors of skeletal muscle atrophy. In this review, we summarize the methods used to construct skeletal muscle cell models, including hormone, inflammation, cachexia, genetic engineering, drug, and physicochemical models. We also analyze, compare, and evaluate the various construction and assessment methods.
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Affiliation(s)
- Liwei Li
- Guangdong Medical University, Wenming East Road 2, Xiashan District, Zhanjiang 524000, Guangdong, China
| | - Chunman Huang
- Guangdong Medical University, Wenming East Road 2, Xiashan District, Zhanjiang 524000, Guangdong, China
| | - Jingqun Pang
- Guangdong Medical University, Wenming East Road 2, Xiashan District, Zhanjiang 524000, Guangdong, China
| | - Yongbin Huang
- Guangdong Medical University, Wenming East Road 2, Xiashan District, Zhanjiang 524000, Guangdong, China
| | - Xinxin Chen
- Institute of Health Promotion and Medical Communication Studies, Affliated Hospital of Guangdong Medical University, South Renmin Road 57, Xiashan District, Zhanjiang 524000, Guangdong, China
| | - Guanghua Chen
- Orthopaedic Center, Affliated Hospital of Guangdong Medical University, South Renmin Road 57, Xiashan District, Zhanjiang 524000, Guangdong, China.
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7
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Martin RA, Keeler SP, Wu K, Shearon WJ, Patel D, Li J, Hoang M, Hoffmann CM, Hughes ME, Holtzman MJ. An alternative mechanism for skeletal muscle dysfunction in long-term post-viral lung disease. Am J Physiol Lung Cell Mol Physiol 2023; 324:L870-L878. [PMID: 37130808 PMCID: PMC10259859 DOI: 10.1152/ajplung.00338.2022] [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: 10/07/2022] [Revised: 04/10/2023] [Accepted: 05/02/2023] [Indexed: 05/04/2023] Open
Abstract
Chronic lung disease is often accompanied by disabling extrapulmonary symptoms, notably skeletal muscle dysfunction and atrophy. Moreover, the severity of respiratory symptoms correlates with decreased muscle mass and in turn lowered physical activity and survival rates. Previous models of muscle atrophy in chronic lung disease often modeled chronic obstructive pulmonary disease (COPD) and relied on cigarette smoke exposure and LPS stimulation, but these conditions independently affect skeletal muscle even without accompanying lung disease. Moreover, there is an emerging and pressing need to understand the extrapulmonary manifestations of long-term post-viral lung disease (PVLD) as found in COVID-19. Here, we examine the development of skeletal muscle dysfunction in the setting of chronic pulmonary disease caused by infection due to the natural pathogen Sendai virus using a mouse model of PVLD. We identify a significant decrease in myofiber size when PVLD is maximal at 49 days after infection. We find no change in the relative types of myofibers, but the greatest decrease in fiber size is localized to fast-twitch-type IIB myofibers based on myosin heavy chain immunostaining. Remarkably, all biomarkers of myocyte protein synthesis and degradation (total RNA, ribosomal abundance, and ubiquitin-proteasome expression) were stable throughout the acute infectious illness and chronic post-viral disease process. Together, the results demonstrate a distinct pattern of skeletal muscle dysfunction in a mouse model of long-term PVLD. The findings thereby provide new insights into prolonged limitations in exercise capacity in patients with chronic lung disease after viral infections and perhaps other types of lung injury.NEW & NOTEWORTHY Our study used a mouse model of post-viral lung disease to study the impact of chronic lung disease on skeletal muscle. The model reveals a decrease in myofiber size that is selective for specific types of myofibers and an alternative mechanism for muscle atrophy that might be independent of the usual markers of protein synthesis and degradation. The findings provide a basis for new therapeutic strategies to correct skeletal muscle dysfunction in chronic respiratory disease.
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Affiliation(s)
- Ryan A Martin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Shamus P Keeler
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Kangyun Wu
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - William J Shearon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Devin Patel
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Jiajia Li
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - My Hoang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Christy M Hoffmann
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Michael E Hughes
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
- Department of Genetics, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Michael J Holtzman
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, United States
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8
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Zhang H, Zhou H, Guo X, Zhang G, Xiao M, Wu S, Jin C, Yang J, Lu X. Cigarette smoke triggers calcium overload in mouse hippocampal neurons via the ΔFOSB-CACNA2D1 axis to impair cognitive performance. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 258:114996. [PMID: 37167740 DOI: 10.1016/j.ecoenv.2023.114996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 03/24/2023] [Accepted: 05/06/2023] [Indexed: 05/13/2023]
Abstract
A growing body of evidence shows that cigarette smoking impairs cognitive performance. The 'Calcium Hypothesis' theory of neuronopathies reveals a critical role of aberrant calcium signaling in compromised cognitive functions. However, the underlying implications of abnormalities in calcium signaling in the neurotoxicity induced by cigarette smoke (CS) have not yet been identified. CACNA2D1, an important auxiliary subunit involved in the composition of voltage-gated calcium channels (VGCCs), was reported to affect the calcium signaling in neurons by facilitating VGCCs-mediated Ca2+ influx. ΔFOSB, an alternatively-spliced product of the Fosb gene, is an activity-dependent transcription factor induced robustly in the brain in response to environmental stimuli such as CS. Interestingly, our preliminary bioinformatics analysis revealed a significant co-expression between ΔFOSB and CACNA2D1 in brain tissues of patients with neurodegenerative diseases characterized by progressive cognitive decline. Therefore, we hypothesized that the activation of the ΔFOSB-CACNA2D1 axis in response to CS exposure might cause dysregulation of calcium homeostasis in hippocampal neurons via VGCCs-mediated Ca2+ influx, thereby contributing to cognitive deficits. To this end, the present study established a CS-induced mouse model of hippocampus-dependent cognitive impairment, in which the activation of the ΔFOSB-CACNA2D1 axis accompanied by severe calcium overload was observed in the mouse hippocampal tissues. More importantly, ΔFOSB knockdown-/overexpression-mediated inactivation/activation of the ΔFOSB-CACNA2D1 axis interdicted/mimicked CS-induced dysregulation of calcium homeostasis followed by severe cellular damage in HT22 mouse hippocampal neurons. Mechanistically speaking, a further ChIP-qPCR assay confirmed the physical interaction between transcription factor ΔFOSB and the Cacna2d1 gene promoter, suggesting a direct transcriptional regulation of the Cacna2d1 gene by ΔFOSB. Overall, our current work aims to deliver a unique insight into the neurotoxic mechanisms induced by CS to explore potential targets for intervention.
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Affiliation(s)
- Hongchao Zhang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Huabin Zhou
- Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Xianhe Guo
- Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Guopei Zhang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Mingyang Xiao
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Shengwen Wu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Cuihong Jin
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Jinghua Yang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Xiaobo Lu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China.
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9
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Henrot P, Dupin I, Schilfarth P, Esteves P, Blervaque L, Zysman M, Gouzi F, Hayot M, Pomiès P, Berger P. Main Pathogenic Mechanisms and Recent Advances in COPD Peripheral Skeletal Muscle Wasting. Int J Mol Sci 2023; 24:ijms24076454. [PMID: 37047427 PMCID: PMC10095391 DOI: 10.3390/ijms24076454] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/14/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a worldwide prevalent respiratory disease mainly caused by tobacco smoke exposure. COPD is now considered as a systemic disease with several comorbidities. Among them, skeletal muscle dysfunction affects around 20% of COPD patients and is associated with higher morbidity and mortality. Although the histological alterations are well characterized, including myofiber atrophy, a decreased proportion of slow-twitch myofibers, and a decreased capillarization and oxidative phosphorylation capacity, the molecular basis for muscle atrophy is complex and remains partly unknown. Major difficulties lie in patient heterogeneity, accessing patients' samples, and complex multifactorial process including extrinsic mechanisms, such as tobacco smoke or disuse, and intrinsic mechanisms, such as oxidative stress, hypoxia, or systemic inflammation. Muscle wasting is also a highly dynamic process whose investigation is hampered by the differential protein regulation according to the stage of atrophy. In this review, we report and discuss recent data regarding the molecular alterations in COPD leading to impaired muscle mass, including inflammation, hypoxia and hypercapnia, mitochondrial dysfunction, diverse metabolic changes such as oxidative and nitrosative stress and genetic and epigenetic modifications, all leading to an impaired anabolic/catabolic balance in the myocyte. We recapitulate data concerning skeletal muscle dysfunction obtained in the different rodent models of COPD. Finally, we propose several pathways that should be investigated in COPD skeletal muscle dysfunction in the future.
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Affiliation(s)
- Pauline Henrot
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
| | - Isabelle Dupin
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
| | - Pierre Schilfarth
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
| | - Pauline Esteves
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
| | - Léo Blervaque
- PhyMedExp, INSERM-CNRS-Montpellier University, F-34090 Montpellier, France
| | - Maéva Zysman
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
| | - Fares Gouzi
- PhyMedExp, INSERM-CNRS-Montpellier University, CHRU Montpellier, F-34090 Montpellier, France
| | - Maurice Hayot
- PhyMedExp, INSERM-CNRS-Montpellier University, CHRU Montpellier, F-34090 Montpellier, France
| | - Pascal Pomiès
- PhyMedExp, INSERM-CNRS-Montpellier University, F-34090 Montpellier, France
| | - Patrick Berger
- Centre de Recherche Cardio-Thoracique de Bordeaux, Univ. Bordeaux, U1045, F-33604 Pessac, France
- INSERM, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, CIC 1401, F-33604 Pessac, France
- CHU de Bordeaux, Service d'Exploration Fonctionnelle Respiratoire, CIC 1401, Service de Pneumologie, F-33604 Pessac, France
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10
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Decker ST, Alexandrou-Majaj N, Layec G. Effects of acute cigarette smoke concentrate exposure on mitochondrial energy transfer in fast- and slow-twitch skeletal muscle. BIOCHIMICA ET BIOPHYSICA ACTA. BIOENERGETICS 2023; 1864:148973. [PMID: 36972770 DOI: 10.1016/j.bbabio.2023.148973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/26/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023]
Abstract
The mechanisms underlying cigarette smoke-induced mitochondrial dysfunction in skeletal muscle are still poorly understood. Accordingly, this study aimed to examine the effects of cigarette smoke on mitochondrial energy transfer in permeabilized muscle fibers from skeletal muscles with differing metabolic characteristics. The electron transport chain (ETC) capacity, ADP transport, and respiratory control by ADP were assessed in fast- and slow-twitch muscle fibers from C57BL/6 mice (n = 11) acutely exposed to cigarette smoke concentrate (CSC) using high-resolution respirometry. CSC decreased complex I-driven respiration in the white gastrocnemius (CONTROL:45.4 ± 11.2 pmolO2.s-1.mg-1 and CSC:27.5 ± 12.0 pmolO2.s-1.mg-1; p = 0.01) and soleus (CONTROL:63.0 ± 23.8 pmolO2.s-1.mg-1 and CSC:44.6 ± 11.1 pmolO2.s-1.mg-1; p = 0.04). In contrast, the effect of CSC on Complex II-linked respiration increased its relative contribution to muscle respiratory capacity in the white gastrocnemius muscle. The maximal respiratory activity of the ETC was significantly inhibited by CSC in both muscles. Furthermore, the respiration rate dependent on the ADP/ATP transport across the mitochondrial membrane was significantly impaired by CSC in the white gastrocnemius (CONTROL:-70 ± 18 %; CSC:-28 ± 10 %; p < 0.001), but not the soleus (CONTROL:47 ± 16 %; CSC:31 ± 7 %; p = 0.08). CSC also significantly impaired mitochondrial thermodynamic coupling in both muscles. Our findings underscore that acute CSC exposure directly inhibits oxidative phosphorylation in permeabilized muscle fibers. This effect was mediated by significant perturbations of the electron transfer in the respiratory complexes, especially at complex I, in both fast and slow twitch muscles. In contrast, CSC-induced inhibition of the exchange of ADP/ATP across the mitochondrial membrane was fiber-type specific, with a large effect on fast-twitch muscles.
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Affiliation(s)
- Stephen T Decker
- Department of Kinesiology, University of Massachusetts Amherst, USA
| | | | - Gwenael Layec
- Department of Kinesiology, University of Massachusetts Amherst, USA; Institute for Applied Life Science, University of Massachusetts Amherst, USA.
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11
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Vainshtein A, Slavin MB, Cheng AJ, Memme JM, Oliveira AN, Perry CGR, Abdul-Sater AA, Belcastro AN, Riddell MC, Triolo M, Haas TL, Roudier E, Hood DA. Scientific meeting report: International Biochemistry of Exercise 2022. J Appl Physiol (1985) 2022; 133:1381-1393. [PMID: 36356257 DOI: 10.1152/japplphysiol.00475.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Exercise is one of the only nonpharmacological remedies known to counteract genetic and chronic diseases by enhancing health and improving life span. Although the many benefits of regular physical activity have been recognized for some time, the intricate and complex signaling systems triggered at the onset of exercise have only recently begun to be uncovered. Exercising muscles initiate a coordinated, multisystemic, metabolic rewiring, which is communicated to distant organs by various molecular mediators. The field of exercise research has been expanding beyond the musculoskeletal system, with interest from industry to provide realistic models and exercise mimetics that evoke a whole body rejuvenation response. The 18th International Biochemistry of Exercise conference took place in Toronto, Canada, from May 25 to May 28, 2022, with more than 400 attendees. Here, we provide an overview of the most cutting-edge exercise-related research presented by 66 speakers, focusing on new developments in topics ranging from molecular and cellular mechanisms of exercise adaptations to exercise therapy and management of disease and aging. We also describe how the manipulation of these signaling pathways can uncover therapeutic avenues for improving human health and quality of life.
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Affiliation(s)
| | - Mikhaela B Slavin
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Arthur J Cheng
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Jonathan M Memme
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Ashley N Oliveira
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Christopher G R Perry
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Ali A Abdul-Sater
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Angelo N Belcastro
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Michael C Riddell
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Matthew Triolo
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Tara L Haas
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - Emilie Roudier
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
| | - David A Hood
- Faculty of Health, School of Kinesiology and Health Science, Muscle Health Research Centre (MHRC), York University, Toronto, Ontario, Canada
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12
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Nogueira L, Zemljic-Harpf AE, Yusufi R, Ranjbar M, Susanto C, Tang K, Mahata SK, Jennings PA, Breen EC. E-cigarette aerosol impairs male mouse skeletal muscle force development and prevents recovery from injury. Am J Physiol Regul Integr Comp Physiol 2022; 323:R849-R860. [PMID: 36250633 PMCID: PMC9678407 DOI: 10.1152/ajpregu.00314.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 11/22/2022]
Abstract
To date, there has been a lag between the rise in E-cigarette use and an understanding of the long-term health effects. Inhalation of E-cigarette aerosol delivers high doses of nicotine, raises systemic cytokine levels, and compromises cardiopulmonary function. The consequences for muscle function have not been thoroughly investigated. The present study tests the hypothesis that exposure to nicotine-containing aerosol impairs locomotor muscle function, limits exercise tolerance, and interferes with muscle repair in male mice. Nicotine-containing aerosol reduced the maximal force produced by the extensor digitorum longus (EDL) by 30%-40% and, the speed achieved in treadmill running by 8%. Nicotine aerosol exposure also decreased adrenal and increased plasma epinephrine and norepinephrine levels, and these changes in catecholamines manifested as increased muscle and liver glycogen stores. In nicotine aerosol exposed mice, muscle regenerating from overuse injury only recovered force to 80% of noninjured levels. However, the structure of neuromuscular junctions (NMJs) was not affected by e-cigarette aerosols. Interestingly, the vehicle used to dissolve nicotine in these vaping devices, polyethylene glycol (PG) and vegetable glycerin (VG), decreased running speed by 11% and prevented full recovery from a lengthening contraction protocol (LCP) injury. In both types of aerosol exposures, cardiac left ventricular systolic function was preserved, but left ventricular myocardial relaxation was altered. These data suggest that E-cigarette use may have a negative impact on muscle force and regeneration due to compromised glucose metabolism and contractile function in male mice.NEW & NOTEWORTHY In male mice, nicotine-containing E-cigarette aerosol compromises muscle contractile function, regeneration from injury, and whole body running speeds. The vehicle used to deliver nicotine, propylene glycol, and vegetable glycerin, also reduces running speed and impairs the restoration of muscle function in injured muscle. However, the predominant effects of nicotine in this inhaled aerosol are evident in altered catecholamine levels, increased glycogen content, decreased running capacity, and impaired recovery of force following an overuse injury.
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Affiliation(s)
- Leonardo Nogueira
- Department of Medicine, University of California, San Diego, La Jolla, California
- School of Exercise and Nutritional Sciences, College of Health and Human Services, San Diego State University, San Diego, California
| | - Alice E Zemljic-Harpf
- Department of Anesthesiology, University of California, San Diego, La Jolla, California
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Raihana Yusufi
- Department of Medicine, University of California, San Diego, La Jolla, California
| | - Maryam Ranjbar
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California
| | - Christopher Susanto
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California
| | - Kechun Tang
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Sushil K Mahata
- Department of Medicine, University of California, San Diego, La Jolla, California
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Patricia A Jennings
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California
| | - Ellen C Breen
- Department of Medicine, University of California, San Diego, La Jolla, California
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13
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Martin RA, Keeler SP, Wu K, Shearon WJ, Patel D, Hoang M, Hoffmann CM, Hughes ME, Holtzman MJ. An alternative mechanism for skeletal muscle dysfunction in long-term post-viral lung disease. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2022:2022.10.07.511313. [PMID: 36238722 PMCID: PMC9558431 DOI: 10.1101/2022.10.07.511313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Chronic lung disease is often accompanied by disabling extrapulmonary symptoms, notably skeletal muscle dysfunction and atrophy. Moreover, the severity of respiratory symptoms correlates with decreased muscle mass and in turn lowered physical activity and survival rates. Previous models of muscle atrophy in chronic lung disease often modeled COPD and relied on cigarette smoke exposure and LPS-stimulation, but these conditions independently affect skeletal muscle even without accompanying lung disease. Moreover, there is an emerging and pressing need to understand the extrapulmonary manifestations of long-term post-viral lung disease (PVLD) as found in Covid-19. Here, we examine the development of skeletal muscle dysfunction in the setting of chronic pulmonary disease using a mouse model of PVLD caused by infection due to the natural pathogen Sendai virus. We identify a significant decrease in myofiber size when PVLD is maximal at 49 d after infection. We find no change in the relative types of myofibers, but the greatest decrease in fiber size is localized to fast-twitch type IIB myofibers based on myosin heavy chain immunostaining. Remarkably, all biomarkers of myocyte protein synthesis and degradation (total RNA, ribosomal abundance, and ubiquitin-proteasome expression) were stable throughout the acute infectious illness and chronic post-viral disease process. Together, the results demonstrate a distinct pattern of skeletal muscle dysfunction in a mouse model of long-term PVLD. The findings thereby provide new insight into prolonged limitations in exercise capacity in patients with chronic lung disease after viral infections and perhaps other types of lung injury.
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Affiliation(s)
- Ryan A. Martin
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - Shamus P. Keeler
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - Kangyun Wu
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - William J. Shearon
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - Devin Patel
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - My Hoang
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - Christy M. Hoffmann
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
| | - Michael E. Hughes
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
- Department of Genetics, Washington University School of Medicine, Saint Louis, MO 63110
| | - Michael J. Holtzman
- Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Saint Louis, MO 63110
- Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, MO 63110
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14
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Jaitovich A. Impaired regenerative capacity contributes to skeletal muscle dysfunction in chronic obstructive pulmonary disease. Am J Physiol Cell Physiol 2022; 323:C974-C989. [PMID: 35993519 PMCID: PMC9484993 DOI: 10.1152/ajpcell.00292.2022] [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: 07/06/2022] [Revised: 08/16/2022] [Accepted: 08/16/2022] [Indexed: 01/18/2023]
Abstract
Locomotor skeletal muscle dysfunction is a relevant comorbidity of chronic obstructive pulmonary disease (COPD) and is strongly associated with worse clinical outcomes including higher mortality. Over the last decades, a large body of literature helped characterize the process, defining the disruptive muscle phenotype caused by COPD that involves reduction in muscle mass, force-generation capacity, fatigue-tolerance, and regenerative potential following injury. A major limitation in the field has been the scarcity of well-calibrated animal models to conduct mechanistic research based on loss- and gain-of-function studies. This article provides an overall description of the process, the tools available to mechanistically investigate it, and the potential role of mitochondrially driven metabolic signals on the regulation muscle regeneration after injury in COPD. Finally, a description of future avenues to further expand on the area is proposed based on very recent evidence involving mitochondrial metabolic cues affecting myogenesis.
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Affiliation(s)
- Ariel Jaitovich
- Division of Pulmonary and Critical Care Medicine, Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York
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15
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Keshawarz A, Joehanes R, Guan W, Huan T, DeMeo DL, Grove ML, Fornage M, Levy D, O’Connor G. Longitudinal change in blood DNA epigenetic signature after smoking cessation. Epigenetics 2022; 17:1098-1109. [PMID: 34570667 PMCID: PMC9542417 DOI: 10.1080/15592294.2021.1985301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/20/2021] [Accepted: 09/21/2021] [Indexed: 12/14/2022] Open
Abstract
Cigarette smoking is associated with epigenetic changes that may be reversible following smoking cessation. Whole blood DNA methylation was evaluated in Framingham Heart Study Offspring (n = 169) and Third Generation (n = 30) cohort participants at two study visits 6 years apart and in Atherosclerosis Risk in Communities (ARIC) study (n = 222) participants at two study visits 20 years apart. Changes in DNA methylation (delta β values) at 483,565 cytosine-phosphate-guanine (CpG) sites and differentially methylated regions (DMRs) were compared between participants who were current, former, or never smokers at both visits (current-current, former-former, never-never, respectively), versus those who quit in the interim (current-former). Interim quitters had more hypermethylation at four CpGs annotated to AHRR, one CpG annotated to F2RL3, and one intergenic CpG (cg21566642) compared with current-current smokers (FDR < 0.02 for all), and two significant DMRs were identified. While there were no significant differentially methylated CpGs in the comparison of interim quitters and former-former smokers, 106 DMRs overlapping with small nucleolar RNA were identified. As compared with all non-smokers, current-current smokers additionally had more hypermethylation at two CpG sites annotated to HIVEP3 and TMEM126A, respectively, and another intergenic CpG (cg14339116). Gene transcripts associated with smoking cessation were implicated in immune responses, cell homoeostasis, and apoptosis. Smoking cessation is associated with early reversion of blood DNA methylation changes at CpG sites annotated to AHRR and F2RL3 towards those of never smokers. Associated gene expression suggests a role of longitudinal smoking-related DNA methylation changes in immune response processes.
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Affiliation(s)
- Amena Keshawarz
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
- Framingham Heart Study, Framingham, MA, USA
| | - Roby Joehanes
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
- Framingham Heart Study, Framingham, MA, USA
| | - Weihua Guan
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Tianxiao Huan
- Framingham Heart Study, Framingham, MA, USA
- Department of Ophthalmology and Visual Sciences, University of Massachusetts Medical School, Worcester, MA, USA
| | - Dawn L. DeMeo
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Boston, MA, USA
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Boston, MA, USA
| | - Megan L. Grove
- Human Genetics Center, Department of Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Myriam Fornage
- McGovern Medical School and Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Brown Foundation Institute of Molecular Medicine, Houston, TX, USA
| | - Daniel Levy
- Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - George O’Connor
- Pulmonary Center, Boston University School of Medicine, Boston, MA, USA
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16
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Zhang Y, Shi X, Sheng H, Hu Y, Pang B, Ma Y, Jin J. Changes in diaphragm contractility in cigarette smoking-exposed and smoking cessation rats are associated with alterations in mitochondrial morphology and homeostasis. Basic Clin Pharmacol Toxicol 2022; 131:392-405. [PMID: 35972955 DOI: 10.1111/bcpt.13781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 07/16/2022] [Accepted: 08/11/2022] [Indexed: 11/28/2022]
Abstract
The effects of cigarette smoking (CS) cessation on the diaphragm are unknown, as are the CS-induced diaphragmatic mitochondrial changes. We examined the changes in diaphragm contractility, as well as alterations in mitochondrial morphology, function and homoeostasis during CS exposure and after cessation. Rats were randomly divided into CS exposure and CS cessation groups: 3-month CS (S3), 6-month CS (S6), 6-month CS followed by 3-month cessation (S6N3). The changes in the diaphragm were investigated, including contractile properties, the ultrastructure, mitochondrial function and the expression of markers of mitochondrial homoeostasis. CS caused irreversible histological disruption and functional depression in the lungs, along with significantly declines in diaphragmatic contractility and more severely in extensor digitorum longus muscular contractility. Such declines were recovered after 3-month CS cessation. CS exposure disrupted the diaphragmatic mitochondrial morphology and function (S6), which was significantly alleviated in the S6N3 group. The mitochondrial homoeostasis was depressed (S6), as indicated by the downregulation of Pink1 and Mfn1. Interestingly, the Mfn1 level was recovered after smoking cessation (S6N3). In conclusion, smoking cessation eased CS-induced diaphragmatic dysfunction and mitochondrial deregulation, which are likely associated with deregulated mitochondrial homoeostasis.
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Affiliation(s)
- Yijie Zhang
- Department of Emergency Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.,Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.,Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Xiaoqian Shi
- The Clinical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Haiyan Sheng
- Department of Respiratory and Critical Care Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yuhan Hu
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Baosen Pang
- The Clinical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yingmin Ma
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.,Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Jiawei Jin
- Department of Respiratory and Critical Care Medicine, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.,The Clinical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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17
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He AWJ, Ngai SPC, Cheung KK, Lau BWM, Sánchez-Vidaña DI, Pang MYC. Impacts of Cigarette Smoke (CS) on Muscle Derangement in Rodents-A Systematic Review. TOXICS 2022; 10:262. [PMID: 35622675 PMCID: PMC9146307 DOI: 10.3390/toxics10050262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/10/2022] [Accepted: 05/16/2022] [Indexed: 02/04/2023]
Abstract
Cigarette smoke (CS) is the major risk factor for chronic obstructive pulmonary disease (COPD) and can induce systemic manifestations, such as skeletal muscle derangement. However, inconsistent findings of muscle derangement were reported in previous studies. The aim of the present study was to consolidate the available evidence and assess the impact of CS on muscle derangement in rodents. A comprehensive literature search of five electronic databases identified ten articles for final analysis. Results showed that the diaphragm, rectus femoris, soleus, and gastrocnemius exhibited significant oxidative to glycolytic fiber conversions upon CS exposure. In contrast, the extensor digitorum longus (EDL), plantaris, and tibialis did not exhibit a similar fiber-type conversion after CS exposure. Hindlimb muscles, including the quadriceps, soleus, gastrocnemius, and EDL, showed significant reductions in the CSA of the muscle fibers in the CS group when compared to the control group. Changes in inflammatory cytokines, exercise capacity, and functional outcomes induced by CS have also been evaluated. CS could induce a shift from oxidative fibers to glycolytic fibers in high-oxidative muscles such as the diaphragm, rectus femoris, and soleus, and cause muscle atrophy, as reflected by a reduction in the CSA of hindlimb muscles such as the quadriceps, soleus, gastrocnemius, and EDL.
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Affiliation(s)
| | - Shirley P. C. Ngai
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (A.W.J.H.); (D.-I.S.-V.); (M.Y.C.P.)
| | - Kwok Kuen Cheung
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (A.W.J.H.); (D.-I.S.-V.); (M.Y.C.P.)
| | - Benson W. M. Lau
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, China; (A.W.J.H.); (D.-I.S.-V.); (M.Y.C.P.)
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18
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Correia TML, Almeida AA, da Silva DA, Coqueiro RDS, Pires RA, de Magalhães ACM, Queiroz RF, Brito LL, Marques LM, Machado M, Pereira R. Interaction between cigarette smoke exposure and physical training on inflammatory and oxidative profile in mice muscle. Chem Biol Interact 2022; 358:109913. [PMID: 35339431 DOI: 10.1016/j.cbi.2022.109913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/07/2022] [Accepted: 03/21/2022] [Indexed: 11/03/2022]
Abstract
Regular physical training and cigarette smoke exposure (CSE) have opposite effects on physical performance, antioxidant, and inflammatory profile. However, the interaction between these events is not well studied. We aimed to investigate how regular physical training and CSE interact, and in what is the outcome of this interaction on the physical performance, skeletal muscle antioxidant defense and molecular profile response of pro and anti-inflammatory cytokines. Male C57BL/6 mice were randomly divided into 4 groups (n = 8/group): 1) Sedentary group (SED); 2) 4 weeks of control, followed by 4 weeks of CSE (SED + CSEG); 3) Physically active (PA) along 8 weeks (forced swim training, 5 times a week); 4) Physically active and exposed to the cigarette smoke (PA + CSEG), group submitted to forced swim training for 4 weeks, followed by 4 weeks of concomitant training and CSE. Physical performance was evaluated before and after the experimental period (8 weeks), total peroxidase and glutathione peroxidase (GPx) activities, expression of genes encoding TNF-α, MCP-1, IL1β, IL-6, IL-10, TGF-β, HO-1 and the TNF-α/IL-10 ratio were determined from gastrocnemius muscle at the end of experimental period. The CSE attenuated the aerobic capacity adaptation (time to exhaustion in swimming forced test) promoted by physical training and inhibit the improvement in local muscle resistance (inverted screen test). The regular physical training enhanced the antioxidant defense, but the CSE abrogated this benefit. The CSE induced a harmful pro-inflammatory profile in skeletal muscle from sedentary animals whereas the regular physical training induced an opposite adaptation. Likewise, the CSE abolished the protective effect of physical training. Together, these results suggest a negative effect of CSE including, at least in part, the inhibition/attenuation of beneficial adaptations from regular physical training.
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Affiliation(s)
- Thiago Macêdo Lopes Correia
- Integrative Physiology Research Center, Department of Biological Sciences, State Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil; Multicentric Postgraduate Program in Physiological Sciences (Brazilian Society of Physiology), Universidade Federal da Bahia (UFBA), Vitoria da Conquista, Bahia, Brazil
| | - Amanda Alves Almeida
- Integrative Physiology Research Center, Department of Biological Sciences, State Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil; Multicentric Postgraduate Program in Physiological Sciences (Brazilian Society of Physiology), Universidade Federal da Bahia (UFBA), Vitoria da Conquista, Bahia, Brazil
| | - Danielba Almeida da Silva
- Postgraduate Program in Biosciences, Universidade Federal da Bahia, Campus Anísio Teixeira, Vitória da Conquista, Brazil
| | - Raildo da Silva Coqueiro
- Integrative Physiology Research Center, Department of Biological Sciences, State Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil
| | - Ramon Alves Pires
- Integrative Physiology Research Center, Department of Biological Sciences, State Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil; Multicentric Postgraduate Program in Biochemistry and Molecular Biology (Brazilian Society of Biochemistry and Molecular Biology), Universidade Estadual do Sudoeste da Bahia (UESB), Vitoria da Conquista, Bahia, Brazil
| | - Amelia Cristina Mendes de Magalhães
- Multicentric Postgraduate Program in Physiological Sciences (Brazilian Society of Physiology), Universidade Federal da Bahia (UFBA), Vitoria da Conquista, Bahia, Brazil
| | - Raphael Ferreira Queiroz
- Multicentric Postgraduate Program in Biochemistry and Molecular Biology (Brazilian Society of Biochemistry and Molecular Biology), Universidade Estadual do Sudoeste da Bahia (UESB), Vitoria da Conquista, Bahia, Brazil; Postgraduate Program in Biosciences, Universidade Federal da Bahia, Campus Anísio Teixeira, Vitória da Conquista, Brazil
| | - Lorena Lôbo Brito
- Multicentric Postgraduate Program in Physiological Sciences (Brazilian Society of Physiology), Universidade Federal da Bahia (UFBA), Vitoria da Conquista, Bahia, Brazil
| | - Lucas Miranda Marques
- Multicentric Postgraduate Program in Physiological Sciences (Brazilian Society of Physiology), Universidade Federal da Bahia (UFBA), Vitoria da Conquista, Bahia, Brazil
| | - Marco Machado
- Universitary Foundation of Itaperuna (FUNITA), Itaperuna, RJ, Brazil; Laboratory of Physiology and Biokinetic, Faculty of Biological Sciences and Health, Iguaçu University, Campus V, Itaperuna, RJ, Brazil
| | - Rafael Pereira
- Integrative Physiology Research Center, Department of Biological Sciences, State Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil; Multicentric Postgraduate Program in Physiological Sciences (Brazilian Society of Physiology), Universidade Federal da Bahia (UFBA), Vitoria da Conquista, Bahia, Brazil; Multicentric Postgraduate Program in Biochemistry and Molecular Biology (Brazilian Society of Biochemistry and Molecular Biology), Universidade Estadual do Sudoeste da Bahia (UESB), Vitoria da Conquista, Bahia, Brazil; Postgraduate Program in Nursing and Health, Universidade Estadual do Sudoeste da Bahia (UESB), Jequie, 45210-506, Bahia, Brazil.
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19
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Nogueira L, Gilmore NK, Hogan MC. Role of parvalbumin in fatigue-induced changes in force and cytosolic calcium transients in intact single mouse myofibers. J Appl Physiol (1985) 2022; 132:1041-1053. [PMID: 35238653 PMCID: PMC8993520 DOI: 10.1152/japplphysiol.00861.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
One of the most important cytosolic Ca2+ buffers present in mouse fast-twitch myofibers, but not in human myofibers, is parvalbumin (PV). Previous work using conventional PV knockout mice suggests that lifelong PV ablation increases fatigue resistance, possibly due to compensations in mitochondrial volume. In this work, PV gene ablation was induced only in adult mice (PV-KO), and contractile and cytosolic Ca2+ responses during fatigue were studied in isolated muscle and intact single myofibers. Results were compared to control littermates (PV-Ctr). We hypothesized that the reduced myofiber cytosolic Ca2+ buffering developed only in adult PV-KO mice leads to a larger cytosolic free Ca2+ concentration ([Ca2+]c) during repetitive contractions, increasing myofiber fatigue resistance. Extensor digitorum longus (EDL) muscles from PV-KO mice had higher force in unfused stimulations (~50%, P<0.05) and slowed relaxation (~46% higher relaxation time, P<0.05) vs PV-Ctr, but muscle fatigue resistance or fatigue-induced changes in relaxation were not different between genotypes (P>0.05). In intact single myofibers from flexor digitorum brevis (FDB) muscles, basal and tetanic [Ca2+]c during fatiguing contractions were higher in PV-KO (P<0.05), accompanied by a greater slowing in estimated sarcoplasmic reticulum (SR) Ca2+ pumping vs PV-Ctr myofibers (~84% reduction, P<0.05), but myofiber fatigue resistance was not different between genotypes (P>0.05). Our results demonstrate that although the estimated SR Ca2+ uptake was accelerated in PV-KO, the total energy demand by the major energy consumers in myofibers, the cross-bridges and SR Ca2+ ATPase, were not altered enough to affect the energy supply for contractions, and therefore fatigue resistance remained unaffected.
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Affiliation(s)
- Leonardo Nogueira
- Section of Physiology; Division of Pulmonary, Critical Care and Sleep Medicine; Department of Medicine, University of California San Diego, La Jolla, California, United States
| | - Natalie K Gilmore
- Section of Physiology; Division of Pulmonary, Critical Care and Sleep Medicine; Department of Medicine, University of California San Diego, La Jolla, California, United States
| | - Michael C Hogan
- Section of Physiology; Division of Pulmonary, Critical Care and Sleep Medicine; Department of Medicine, University of California San Diego, La Jolla, California, United States
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20
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Smoking Obstructive Sleep Apnea: Arguments for a Distinctive Phenotype and a Personalized Intervention. J Pers Med 2022; 12:jpm12020293. [PMID: 35207781 PMCID: PMC8875333 DOI: 10.3390/jpm12020293] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/31/2022] [Accepted: 02/11/2022] [Indexed: 02/01/2023] Open
Abstract
Background: This is the first study that aims to define smoking, with obstructive sleep apnea (OSA), as a phenotype (SOSA). Moreover, we wanted to demonstrate the deleterious effects of the continuation of smoking on OSA. Methods: The cross-sectional study highlighted four dimensions of SOSA: the demographic and anthropometric features, the symptoms, the comorbidities, and the sleep study parameters. This study compared these characteristics between current smokers (CS), those who have never smoked (NS), and ex-smokers (ES) with OSA. Results: More men (83.95% in CS, versus 66.67% in NS) and an earlier onset of OSA (average age = 50.05 in CS, versus 52.26 in NS, p = 0.04) were recorded among CS. The distinguishing symptom of CS was daytime sleepiness, with an Epworth score that was significantly higher than in NS. Chronic obstructive pulmonary disease (COPD) was significantly more prevalent in CS (38.27%) than in NS (1.51%) (p < 0.001). The severity of OSA, consisting of a higher apnea-hypopnea index, a higher oxygen desaturation index, and a longer time spent below 90% oxygen saturation during sleep was significantly influenced by smoking. Conclusions: The SOSA phenotype includes younger male patients with a higher waist circumference, suggesting central obesity. They have a higher prevalence of COPD and a greater severity of OSA, in correlation with the number of pack-years of smoking.
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21
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Vieira Ramos G, de Sousa Neto IV, Toledo-Arruda AC, Marqueti RDC, Vieira RP, Martins MA, Salvini TF, Durigan JLQ. Moderate Treadmill Training Induces Limited Effects on Quadriceps Muscle Hypertrophy in Mice Exposed to Cigarette Smoke Involving Metalloproteinase 2. Int J Chron Obstruct Pulmon Dis 2022; 17:33-42. [PMID: 35027823 PMCID: PMC8752871 DOI: 10.2147/copd.s326894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/29/2021] [Indexed: 12/02/2022] Open
Abstract
Background Long-term cigarette smoke (CS) induces substantive extrapulmonary effects, including musculoskeletal system disorders. Exercise training seems to protect long-term smokers against fiber atrophy in the locomotor muscles. Nevertheless, the extracellular matrix (ECM) changes in response to aerobic training remain largely unknown. Thus, we investigated the effects of moderate treadmill training on aerobic performance, cross-sectional area (CSA), fiber distribution, and metalloproteinase 2 (MMP-2) activity on quadriceps muscle in mice exposed to chronic CS. Methods Male mice were randomized into four groups: control or smoke (6 per group) and exercise or exercise+smoke (5 per group). Animals were exposed to 12 commercially filtered cigarettes per day (0.8 mg of nicotine, 10 mg of tar, and 10 mg of CO per cigarette). The CSA, fibers distribution, and MMP-2 activity by zymography were assessed after a period of treadmill training (50% of maximal exercise capacity for 60 min/day, 5 days/week) for 24 weeks. Results The CS exposure did not change CSA compared to the control group (p>0.05), but minor fibers in the frequency distribution (<1000 µm2) were observed. Long-term CS exposure attenuated CSA increases in exercise conditions (smoke+exercise vs exercise) while did not impair aerobic performance. Quadriceps CSA increased in mice nonsmoker submitted to aerobic training (p = 0.001). There was higher pro-MMP-2 activity in the smoke+exercise group when compared to the smoke group (p = 0.01). Regarding active MMP-2, the exercise showed higher values when compared to the control group (p = 0.001). Conclusion Moderate treadmill training for 24 weeks in mice exposed to CS did not modify CSA, despite inducing higher pro-MMP-2 activity in the quadriceps muscle, suggesting limited effects on ECM remodeling. Our findings may contribute to new insights into molecular mechanisms for CS conditions.
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Affiliation(s)
- Gracielle Vieira Ramos
- Physical Therapy Division, University of Brasilia, Brasília, DF, Brazil.,Department of Physical Therapy, University Paulista, Brasília, DF, Brazil
| | - Ivo Vieira de Sousa Neto
- Laboratory of Molecular Analysis, Graduate Program of Sciences and Technology of Health, Universidade de Brasília, Brasília, DF, Brazil
| | - Alessandra Choqueta Toledo-Arruda
- Faculty of Physiotherapy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Department of Medicine Clinical (LIM 20), School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Rita de Cassia Marqueti
- Laboratory of Molecular Analysis, Graduate Program of Sciences and Technology of Health, Universidade de Brasília, Brasília, DF, Brazil
| | - Rodolfo P Vieira
- Universidade Brasil, Post-Graduation Program in Bioengineering, São Paulo, Brazil.,Laboratory of Pulmonary and Exercise Immunology (LABPEI), Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE) and Nove de Julho University (UNINOVE), São Paulo, SP, Brazil.,Federal University of Sao Paulo, Post-Graduation Program in Sciences of Human Movement and Rehabilitation, São Paulo, Brazil
| | - Milton A Martins
- Department of Medicine Clinical (LIM 20), School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Tânia F Salvini
- Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil
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22
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Pekas EJ, Wooden TK, Yadav SK, Park SY. Body mass-normalized moderate dose of dietary nitrate intake improves endothelial function and walking capacity in patients with peripheral artery disease. Am J Physiol Regul Integr Comp Physiol 2021; 321:R162-R173. [PMID: 34161745 DOI: 10.1152/ajpregu.00121.2021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Peripheral artery disease (PAD) is characterized by the accumulation of atherosclerotic plaques in the lower extremity conduit arteries, which impairs blood flow and walking capacity. Dietary nitrate has been used to reduce blood pressure (BP) and improve walking capacity in PAD. However, a standardized dose for PAD has not been determined. Therefore, we sought to determine the effects of a body mass-normalized moderate dose of nitrate (0.11 mmol nitrate/kg) as beetroot juice on serum nitrate/nitrite, vascular function, walking capacity, and tissue oxygen utilization capacity in patients with PAD. A total of 11 patients with PAD received either nitrate supplement or placebo in a randomized crossover design. Total serum nitrate/nitrite, resting BP, brachial and popliteal artery endothelial function (flow-mediated dilation, FMD), arterial stiffness (pulse-wave velocity, PWV), augmentation index (AIx), maximal walking distance and time, claudication onset time, and skeletal muscle oxygen utilization were measured pre- and postnitrate and placebo intake. There were significant group × time interactions (P < 0.05) for serum nitrate/nitrite, FMD, BP, walking distance and time, and skeletal muscle oxygen utilization. The nitrate group showed significantly increased serum nitrate/nitrite (Δ1.32 μM), increased brachial and popliteal FMD (Δ1.3% and Δ1.7%, respectively), reduced peripheral and central systolic BP (Δ-4.7 mmHg and Δ-8.2 mmHg, respectively), increased maximal walking distance (Δ92.7 m) and time (Δ56.3 s), and reduced deoxygenated hemoglobin during walking. There were no changes in PWV, AIx, or claudication (P > 0.05). These results indicate that a body-mass normalized moderate dose of nitrate may be effective and safe for reducing BP, improving endothelial function, and improving walking capacity in patients with PAD.
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Affiliation(s)
- Elizabeth J Pekas
- School of Health & Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
| | - TeSean K Wooden
- School of Health & Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
| | - Santosh K Yadav
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Song-Young Park
- School of Health & Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
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23
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Chan SMH, Bernardo I, Mastronardo C, Mou K, De Luca SN, Seow HJ, Dobric A, Brassington K, Selemidis S, Bozinovski S, Vlahos R. Apocynin prevents cigarette smoking-induced loss of skeletal muscle mass and function in mice by preserving proteostatic signalling. Br J Pharmacol 2021; 178:3049-3066. [PMID: 33817783 PMCID: PMC8362135 DOI: 10.1111/bph.15482] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 03/08/2021] [Accepted: 03/24/2021] [Indexed: 12/15/2022] Open
Abstract
Background and Purpose Skeletal muscle dysfunction is a major comorbidity of chronic obstructive pulmonary disease (COPD). This type of muscle dysfunction may be a direct consequence of oxidative insults evoked by cigarette smoke (CS) exposure. The present study examined the effects of a potent Nox inhibitor and reactive oxygen species (ROS) scavenger, apocynin, on CS‐induced muscle dysfunction. Experimental Approach Male BALB/c mice were exposed to either room air (sham) or CS generated from nine cigarettes per day, 5 days a week for 8 weeks, with or without the coadministration of apocynin (5 mg·kg−1, i.p.). C2C12 myotubes exposed to either hydrogen peroxide (H2O2) or water‐soluble cigarette smoke extract (CSE) with or without apocynin (500 nM) were used as an experimental model in vitro. Key Results Eight weeks of CS exposure caused muscle dysfunction in mice, reflected by 10% loss of muscle mass and 54% loss of strength of tibialis anterior which were prevented by apocynin administration. In C2C12 myotubes, direct exposure to H2O2 or CSE caused myofibre wasting, accompanied by ~50% loss of muscle‐derived insulin‐like growth factor (IGF)‐1 and two‐fold induction of Cybb, independent of cellular inflammation. Expression of myostatin and MAFbx, negative regulators of muscle mass, were up‐regulated under H2O2 but not CSE conditions. Apocynin treatment abolished CSE‐induced Cybb expression, preserving muscle‐derived IGF‐1 expression and signalling pathway downstream of mammalian target of rapamycin (mTOR), thereby preventing myofibre wasting. Conclusion and Implications Targeted pharmacological inhibition of Nox‐derived ROS may alleviate the lung and systemic manifestations in smokers with COPD.
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Affiliation(s)
- Stanley M H Chan
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Ivan Bernardo
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Chanelle Mastronardo
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Kevin Mou
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Simone N De Luca
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Huei Jiunn Seow
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Aleksandar Dobric
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Kurt Brassington
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Stavros Selemidis
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Steven Bozinovski
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Ross Vlahos
- School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
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24
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Nogueira L, Breen EC. Cigarettes Make You Weak: RANKL/RANK Link Changes in Muscle and Bone. Am J Respir Cell Mol Biol 2021; 64:533-535. [PMID: 33711242 PMCID: PMC8086038 DOI: 10.1165/rcmb.2021-0098ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Leonardo Nogueira
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine University of California San Diego La Jolla, California and
- Instituto de Bioquímica Médica Leopoldo de Meis Universidade Federal do Rio de Janeiro Rio de Janeiro, Brazil
| | - Ellen C Breen
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine University of California San Diego La Jolla, California and
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25
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Ajime TT, Serré J, Wüst RCI, Messa GAM, Poffé C, Swaminathan A, Maes K, Janssens W, Troosters T, Degens H, Gayan-Ramirez G. Two Weeks of Smoking Cessation Reverse Cigarette Smoke-Induced Skeletal Muscle Atrophy and Mitochondrial Dysfunction in Mice. Nicotine Tob Res 2021; 23:143-151. [PMID: 31965191 DOI: 10.1093/ntr/ntaa016] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 01/20/2020] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Apart from its adverse effects on the respiratory system, cigarette smoking also induces skeletal muscle atrophy and dysfunction. Whether short-term smoking cessation can restore muscle mass and function is unknown. We, therefore, studied the impact of 1- and 2-week smoking cessation on skeletal muscles in a mouse model. METHODS Male mice were divided into four groups: Air-exposed (14 weeks); cigarette smoke (CS)-exposed (14 weeks); CS-exposed (13 weeks) followed by 1-week cessation; CS-exposed (12 weeks) followed by 2 weeks cessation to examine exercise capacity, physical activity levels, body composition, muscle function, capillarization, mitochondrial function and protein expression in the soleus, plantaris, and diaphragm muscles. RESULTS CS-induced loss of body and muscle mass was significantly improved within 1 week of cessation due to increased lean and fat mass. Mitochondrial respiration and protein levels of the respiratory complexes in the soleus were lower in CS-exposed mice, but similar to control values after 2 weeks of cessation. Exposing isolated soleus muscles to CS extracts reduced mitochondrial respiration that was reversed after removing the extract. While physical activity was reduced in all groups, exercise capacity, limb muscle force, fatigue resistance, fiber size and capillarization, and diaphragm cytoplasmic HIF-1α were unaltered by CS-exposure. However, CS-induced diaphragm atrophy and increased capillary density were not seen after 2 weeks of smoking cessation. CONCLUSION In male mice, 2 weeks of smoking cessation reversed smoking-induced mitochondrial dysfunction, limb muscle mass loss, and diaphragm muscle atrophy, highlighting immediate benefits of cessation on skeletal muscles. IMPLICATIONS Our study demonstrates that CS-induced skeletal muscle mitochondrial dysfunction and atrophy are significantly improved by 2 weeks of cessation in male mice. We show for the first time that smoking cessation as short as 1 to 2 weeks is associated with immediate beneficial effects on skeletal muscle structure and function with the diaphragm being particularly sensitive to CS-exposure and cessation. This could help motivate smokers to quit smoking as early as possible. The knowledge that smoking cessation has potential positive extrapulmonary effects is particularly relevant for patients referred to rehabilitation programs and those admitted to hospitals suffering from acute or chronic muscle deterioration yet struggling with smoking cessation.
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Affiliation(s)
- Tom Tanjeko Ajime
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU-Leuven, Leuven, Belgium.,Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, KU-Leuven, Leuven, Belgium.,Department of Life Sciences, Research Center for Musculoskeletal Science and Sports Medicine, Manchester Metropolitan University, Manchester, UK
| | - Jef Serré
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU-Leuven, Leuven, Belgium
| | - Rob C I Wüst
- Laboratory of Myology, Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Guy Anselme Mpaka Messa
- Department of Life Sciences, Research Center for Musculoskeletal Science and Sports Medicine, Manchester Metropolitan University, Manchester, UK
| | - Chiel Poffé
- Exercise Physiology Research Group, Department of Movement Sciences, KU-Leuven, Leuven, Belgium
| | | | - Karen Maes
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU-Leuven, Leuven, Belgium
| | - Wim Janssens
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU-Leuven, Leuven, Belgium
| | - Thierry Troosters
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU-Leuven, Leuven, Belgium.,Research Group for Rehabilitation in Internal Disorders, Department of Rehabilitation Sciences, KU-Leuven, Leuven, Belgium
| | - Hans Degens
- Department of Life Sciences, Research Center for Musculoskeletal Science and Sports Medicine, Manchester Metropolitan University, Manchester, UK.,Lithuanian Sports University, Kaunas, Lithuania
| | - Ghislaine Gayan-Ramirez
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU-Leuven, Leuven, Belgium
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Relationship between smoking and the incidence of sarcopenia: The SarcoPhAge cohort. Public Health 2021; 193:101-108. [PMID: 33773322 DOI: 10.1016/j.puhe.2021.01.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/08/2021] [Accepted: 01/23/2021] [Indexed: 12/26/2022]
Abstract
INTRODUCTION The association of tobacco use and incidence of muscle impairments has not been extensively explored in research. In this study, the relationship between smoking and the incidence of sarcopenia is investigated. METHODS The present longitudinal study used data from the Sarcopenia and Physical Impairment with advancing Age (SarcoPhAge) cohort, which includes older adults aged ≥65 years. All individuals with follow-up data on muscle health were included in this post hoc analysis. A diagnosis of sarcopenia was established, at each year of follow-up, according to the European Working Group on Sarcopenia in older People 2 (EWGSOP2) criteria. A sensitivity analysis was performed using other diagnostic criteria for sarcopenia. The smoking status and the number of cigarettes smoked per day were self-reported. The relationship between smoking status or the number of cigarettes smoked per day and the incidence of sarcopenia/severe sarcopenia throughout the 5 years of follow-up was evaluated using the Cox proportional hazards model. RESULTS In total, the study population included 420 participants, with a median age of 71.7 years (P25-P75 = 67.7-76.9 years) and 59.8% were female. Over the 5 years of follow-up, 78 participants (18.6%) became sarcopenic as per the EWGSOP2 criteria and 41 individuals (9.8%) developed severe sarcopenia. There were significantly more smokers than non-smokers who developed sarcopenia (35.9% vs 16.8%, P-value = 0.003). A fully adjusted Cox model confirmed this observation, yielding a hazard ratio of 2.36 (95% confidence interval [CI]: 1.31-4.26), meaning that smokers have a 2.36-fold higher risk of developing sarcopenia. Furthermore, individuals who smoked had a 2.68 times increased risk of developing severe sarcopenia (95% CI: 1.21-5.93) than those who did not smoke. Sensitivity analyses globally confirmed these findings when applying other diagnostic criteria for sarcopenia. DISCUSSION Smoking seems to be an important predictor for the onset of sarcopenia, highlighting, once again, that tobacco use is a major public health problem.
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Thirupathi A, Scarparo S, Silva PL, Marqueze LF, Vasconcelos FTF, Nagashima S, Cunha EBB, de Noronha L, Silveira PCL, Nesi RT, Gu Y, Pinho RA. Physical Exercise-Mediated Changes in Redox Profile Contribute to Muscle Remodeling After Passive Hand-Rolled Cornhusk Cigarette Smoke Exposure. Front Physiol 2020; 11:590962. [PMID: 33281621 PMCID: PMC7705113 DOI: 10.3389/fphys.2020.590962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 10/29/2020] [Indexed: 12/17/2022] Open
Abstract
Consumption of non-traditional cigarettes has increased considerably worldwide, and they can induce skeletal muscle dysfunction. Physical exercise has been demonstrated to be important for prevention and treatment of smoking-related diseases. Therfore, the aim of this study was to investigate the effects of combined physical exercise (aerobic plus resistance exercise) on muscle histoarchitecture and oxidative stress in the animals exposed chronically to smoke from hand-rolled cornhusk cigarette (HRCC). Male Swiss mice were exposed to ambient air or passively to the smoke of 12 cigarettes over three daily sessions (four cigarettes per session) for 30 consecutive days with or without combined physical training. 48 h after the last training session, total leukocyte count was measured in bronchoalveolar lavage fluid (BALF), and the quadriceps were removed for histological/immunohistochemical analysis and measurement of oxidative stress parameters. The effects of HRCC on the number of leukocytes in BALF, muscle fiber diameter, central nuclei, and nuclear factor kappa B (NF-κB) were reverted after combined physical training. In addition, increased myogenic factor 5, tumor necrosis factor alpha (TNFα), reduced transforming growth factor beta (TGF-β), and nitrate levels were observed after physical training. However, the reduction in superoxide dismutase and glutathione/glutathione oxidized ratio induced by HRCC was not affected by the training program. These results suggest the important changes in the skeletal muscle brought about by HRCC-induced alteration in the muscle redox profile. In addition, combined physical exercise contributes to remodeling without disrupting muscle morphology.
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Affiliation(s)
| | - Silvia Scarparo
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Paulo L Silva
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Luis F Marqueze
- Laboratory of Exercise Biochemistry in Health, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Franciane T F Vasconcelos
- Laboratory of Exercise Biochemistry in Health, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Seigo Nagashima
- Laboratory of Experimental Pathology, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Eduardo B B Cunha
- Laboratory of Exercise Biochemistry in Health, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Lúcia de Noronha
- Laboratory of Experimental Pathology, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Paulo C L Silveira
- Laboratory of Experimental Pathophysiology, Graduate Program in Health Sciences, Universidade do Extremo Sul Catarinense, Criciúma, Brazil
| | - Renata T Nesi
- Laboratory of Exercise Biochemistry in Health, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Ricardo A Pinho
- Laboratory of Exercise Biochemistry in Health, Graduate Program in Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
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Sulaeman A, Fine J, de Vargas-Machuca A, Vitorino SA, Wagner PD, Fruttiger M, Breen EC. Synergistic effect of vascular endothelial growth factor gene inactivation in endothelial cells and skeletal myofibres on muscle enzyme activity, capillary supply and endurance exercise in mice. Exp Physiol 2020; 105:2168-2177. [PMID: 32936962 DOI: 10.1113/ep088924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/15/2020] [Indexed: 12/18/2022]
Abstract
NEW FINDINGS What is the central question of this study? Does vascular endothelial growth factor (VEGF) expressed by both endothelial cells and skeletal myofibres maintain the number of skeletal muscle capillaries and regulate endurance exercise? What is the main finding and its importance? VEGF expressed by both endothelial cells and skeletal myofibres is not essential for maintaining capillary number but does contribute to exercise performance. ABSTRACT Many chronic diseases lead to exercise intolerance, with loss of skeletal muscle capillaries. While many muscle cell types (myofibres, satellite cells, endothelial cells, macrophages and fibroblasts) express vascular endothelial growth factor (VEGF), most muscle VEGF is stored in myofibre vesicles which can release VEGF to signal VEGF receptor-expressing cells. VEGF gene ablation in myofibres or endothelial cells alone does not cause capillary regression. We hypothesized that simultaneously deleting the endothelial cell (EC) and skeletal myofibre (Skm) VEGF gene would cause capillary regression and impair exercise performance. This was tested in adult mice by simultaneous conditional deletion of the VEGF gene (Skm/EC-VEGF-/- mice) through the use of VEGFLoxP, HSA-Cre-ERT2 and PDGFb-iCre-ERT2 transgenes. These double-deletion mice were compared to three control groups - WT, EC VEGF gene deletion alone and myofibre VEGF gene deletion alone. Three weeks after initiating gene deletion, Skm/EC-VEGF-/- mice, but not SkmVEGF-/- or EC-VEGF-/- mice, reached exhaustion 40 min sooner than WT mice in treadmill tests (P = 0.002). WT, SkmVEGF-/- and EC-VEGF-/- , but not Skm/EC-VEGF-/- , mice gained weight over the 3 weeks. Capillary density, fibre area and capillary: fibre ratio in soleus, plantaris, gastrocnemius and cardiac papillary muscle were similar across the groups. Phosphofructokinase and pyruvate dehydrogenase activities increased only in Skm/EC-VEGF-/- mice. These data suggest that deletion of the VEGF gene simultaneously in endothelial cells and myofibres, while reducing treadmill endurance and despite compensatory augmentation of glycolysis, is not required for muscle capillary maintenance. Reduced endurance remains unexplained, but may possibly be related to a role for VEGF in controlling perfusion of contracting muscle.
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Affiliation(s)
- Alexis Sulaeman
- Department of Medicine, University of California, San Diego, CA, USA
| | - Janelle Fine
- Department of Medicine, University of California, San Diego, CA, USA
| | | | - Steven A Vitorino
- Department of Medicine, University of California, San Diego, CA, USA
| | - Peter D Wagner
- Department of Medicine, University of California, San Diego, CA, USA
| | - Marcus Fruttiger
- UCL Institute of Ophthalmology, University College London, London, UK
| | - Ellen C Breen
- Department of Medicine, University of California, San Diego, CA, USA
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Wiener RC, Findley PA, Shen C, Dwibedi N, Sambamoorthi U. Relationship between smoking status and muscle strength in the United States older adults. Epidemiol Health 2020; 42:e2020055. [PMID: 32777884 PMCID: PMC7871150 DOI: 10.4178/epih.e2020055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/28/2020] [Indexed: 11/09/2022] Open
Abstract
OBJECTIVES Muscle strength in older adults is associated with greater physical ability. Identifying interventions to maintain muscle strength can therefore improve quality of life. The purpose of this study was to evaluate whether current or former smoking status is associated with a decrease in muscle strength in older adults. METHODS Data from the Health and Retirement Study from 2012-2014 were analyzed with regard to maximum dominant hand grip strength, maximum overall hand grip strength, and smoking status (current, former, or never). Unadjusted linear regression was conducted. Other factors known to be related to strength were included in the adjusted linear regression analyses. RESULTS For maximum grip strength, the regression coefficient was 4.91 for current smoking (standard error [SE], 0.58; p<0.001), 3.58 for former smoking (SE, 0.43; p<0.001), and 28.12 for never smoking (SE, 0.34). Fully adjusted linear regression on the relationship between dominant hand grip strength and smoking did not yield a significant result. The factors significantly associated with dominant hand grip strength were male sex, younger age, a race/ethnicity of non-Hispanic White or non-Hispanic Black, higher income, morbidity of ≤1 condition, no pain, and moderate or vigorous exercise more than once a week. CONCLUSIONS Muscle strength in older adults was not associated with smoking status in the adjusted analysis.
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Affiliation(s)
- R. Constance Wiener
- Department of Dental Practice and Rural Health, West Virginia University, School of Dentistry, Morgantown, WV, USA
| | | | - Chan Shen
- Department of Surgery, Department of Public Health Sciences, Penn State College of Medicine, Hershey, PA, USA
| | - Nilanjana Dwibedi
- Department of Pharmaceutical Systems and Policy, West Virginia University School of Pharmacy, Morgantown, WV, USA
| | - Usha Sambamoorthi
- Department of Pharmaceutical Systems and Policy, West Virginia University School of Pharmacy, Morgantown, WV, USA
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Mañas-García L, Guitart M, Duran X, Barreiro E. Satellite Cells and Markers of Muscle Regeneration during Unloading and Reloading: Effects of Treatment with Resveratrol and Curcumin. Nutrients 2020; 12:nu12061870. [PMID: 32585875 PMCID: PMC7353305 DOI: 10.3390/nu12061870] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/04/2020] [Accepted: 06/18/2020] [Indexed: 12/11/2022] Open
Abstract
We hypothesized that treatment with pharmacological agents known to increase sirtuin-1 activity (resveratrol and curcumin) may enhance muscle regeneration. In limb muscles of mice (C57BL/6J, 10 weeks) exposed to reloading for seven days following a seven-day period of hindlimb immobilization with/without curcumin or resveratrol treatment, progenitor muscle cell numbers (FACS), satellite cell subtypes (histology), early and late muscle regeneration markers, phenotype and morphometry, sirtuin-1 activity and content, and muscle function were assessed. Treatment with either resveratrol or curcumin in immobilized muscles elicited a significant improvement in numbers of progenitor, activated, quiescent, and total counts of muscle satellite cells, compared to non-treated animals. Treatment with either resveratrol or curcumin in reloaded muscles compared to non-treated mice induced a significant improvement in the CSA of both hybrid (curcumin) and fast-twitch fibers (resveratrol), sirtuin-1 activity (curcumin), sirtuin-1 content (resveratrol), and counts of progenitor muscle cells (resveratrol). Treatment with the pharmacological agents resveratrol and curcumin enhanced the numbers of satellite cells (muscle progenitor, quiescent, activated, and total satellite cells) in the unloaded limb muscles but not in the reloaded muscles. These findings have potential clinical implications as treatment with these phenolic compounds would predominantly be indicated during disuse muscle atrophy to enhance the muscle regeneration process.
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Affiliation(s)
- Laura Mañas-García
- 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), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain; (L.M.-G.); (M.G.)
| | - Maria Guitart
- 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), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain; (L.M.-G.); (M.G.)
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), 08003 Barcelona, Spain
| | - Xavier Duran
- Scientific and Technical Department, Hospital del Mar-IMIM, 08003 Barcelona, Spain;
| | - 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 (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain; (L.M.-G.); (M.G.)
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), 08003 Barcelona, Spain
- Correspondence: ; Tel.: +34-93-316-0385; Fax: +34-93-316-0410
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Changes in Body Composition During Adjuvant FOLFOX Chemotherapy and Overall Survival in Non-Metastatic Colon Cancer. Cancers (Basel) 2019; 12:cancers12010060. [PMID: 31878325 PMCID: PMC7016804 DOI: 10.3390/cancers12010060] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/03/2019] [Accepted: 12/19/2019] [Indexed: 12/30/2022] Open
Abstract
The impact of longitudinal anthropometric changes during adjuvant chemotherapy on long-term survival in non-metastatic colon cancer is unclear. Herein, we analyzed the prognostic significance of computed tomography (CT)-measured body composition changes in colon cancer patients who underwent surgery followed by adjuvant FOLFOX (folinic acid, 5-fluorouracil, oxaliplatin) chemotherapy. Data of 167 patients with stage III or high-risk stage II colon cancer were analyzed. Skeletal muscle index (SMI), skeletal muscle radiodensity (SMR), visceral fat index (VFI), subcutaneous fat index (SFI), and total fat index (TFI) changes during chemotherapy were calculated using preoperative and postchemotherapy CT image data. The Cox proportional hazard model was used to determine the correlation between changes in anthropometric values and overall survival (OS). The median changes (%) in SMI, SMR, VFI, SFI, and TFI over 210 days during chemotherapy were 8.7% (p < 0.001), 3.4% (p = 0.001), -19% (p < 0.001), -3.4% (p = 0.936), and -11.9% (p < 0.001), respectively. Cut-off values of changes in SMI (skeletal muscle index change, SMIC) and SMR (skeletal muscle radiodensity change, SMRC) were defined at -2% and -2 Hounsfield units (HU) respectively, whereas those of changes in VFI (visceral fat index change, VFIC), SFI (subcutaneous fat index change, SFIC), and TFI (total fat index change, TFIC) were based on values that provided the largest χ2 on the Mantel-Cox test. Multivariable analysis revealed that low SMR measured on a postchemotherapy CT scan (hazard ratio, HR: 0.32, 95% confidence interval, CI: 0.15-0.70, p = 0.004) and visceral fat loss of at least 46.57% (HR: 0.31, 95% CI: 0.14-0.69, p = 0.004) were independent poor prognostic factors for OS. Severe visceral fat loss during FOLFOX chemotherapy and low skeletal muscle radiodensity measured on postchemotherapy CT scans are associated with poor OS in stage III and high-risk stage II colon cancer patients.
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Cannon DT, Rodewohl L, Adams V, Breen EC, Bowen TS. Skeletal myofiber VEGF deficiency leads to mitochondrial, structural, and contractile alterations in mouse diaphragm. J Appl Physiol (1985) 2019; 127:1360-1369. [PMID: 31487223 DOI: 10.1152/japplphysiol.00779.2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Diaphragm dysfunction accompanies cardiopulmonary disease and impaired oxygen delivery. Vascular endothelial growth factor (VEGF) regulates oxygen delivery through angiogenesis, capillary maintenance, and contraction-induced perfusion. We hypothesized that myofiber-specific VEGF deficiency contributes to diaphragm weakness and fatigability. Diaphragm protein expression, capillarity and fiber morphology, mitochondrial respiration and hydrogen peroxide (H2O2) generation, and contractile function were compared between adult mice with conditional gene ablation of skeletal myofiber VEGF (SkmVEGF-/-; n = 12) and littermate controls (n = 13). Diaphragm VEGF protein was ~50% lower in SkmVEGF-/- than littermate controls (1.45 ± 0.65 vs. 3.04 ± 1.41 pg/total protein; P = 0.001). This was accompanied by an ~15% impairment in maximal isometric specific force (F[1,23] = 15.01, P = 0.001) and a trend for improved fatigue resistance (P = 0.053). Mean fiber cross-sectional area and type I fiber cross-sectional area were lower in SkmVEGF-/- by ~40% and ~25% (P < 0.05). Capillary-to-fiber ratio was also lower in SkmVEGF-/- by ~40% (P < 0.05), and thus capillary density was not different. Sarcomeric actin expression was ~30% lower in SkmVEGF-/- (P < 0.05), whereas myosin heavy chain and MAFbx were similar (measured via immunoblot). Mitochondrial respiration, citrate synthase activity, PGC-1α, and hypoxia-inducible factor 1α were not different in SkmVEGF-/- (P > 0.05). However, mitochondrial-derived reactive oxygen species (ROS) flux was lower in SkmVEGF-/- (P = 0.0003). In conclusion, myofiber-specific VEGF gene deletion resulted in a lower capillary-to-fiber ratio, type I fiber atrophy, actin loss, and contractile dysfunction in the diaphragm. In contrast, mitochondrial respiratory function was preserved alongside lower ROS generation, which may play a compensatory role to preserve fatigue resistance in the diaphragm.NEW & NOTEWORTHY Diaphragm weakness is a hallmark of diseases in which oxygen delivery is compromised. Vascular endothelial growth factor (VEGF) modulates muscle perfusion; however, it remains unclear whether VEGF deficiency contributes to the onset of diaphragm dysfunction. Conditional skeletal myofiber VEGF gene ablation impaired diaphragm contractile function and resulted in type I fiber atrophy, a lower number of capillaries per fiber, and contractile protein content. Mitochondrial function was similar and reactive oxygen species flux was lower. Diaphragm VEGF deficiency may contribute to the onset of respiratory muscle weakness.
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Affiliation(s)
- Daniel T Cannon
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, California
| | - Lukas Rodewohl
- Department of Internal Medicine and Cardiology, Universität Leipzig Herzzentrum, Leipzig, Germany
| | - Volker Adams
- Department of Internal Medicine and Cardiology, Technische Universität Dresden, Dresden, Germany
| | - Ellen C Breen
- Department of Medicine, University of California, San Diego, California
| | - T Scott Bowen
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
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Bailey SJ, Gandra PG, Jones AM, Hogan MC, Nogueira L. Incubation with sodium nitrite attenuates fatigue development in intact single mouse fibres at physiological P O 2 . J Physiol 2019; 597:5429-5443. [PMID: 31541562 DOI: 10.1113/jp278494] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 09/20/2019] [Indexed: 12/22/2022] Open
Abstract
KEY POINTS Dietary nitrate supplementation increases plasma nitrite concentration, which provides an oxygen-independent source of nitric oxide and can delay skeletal muscle fatigue. Nitrate supplementation has been shown to increase myofibre calcium release and force production in mouse skeletal muscle during contractions at a supra-physiological oxygen tension, but it is unclear whether nitrite exposure can delay fatigue development and improve myofibre calcium handling at a near-physiological oxygen tension. Single mouse muscle fibres acutely treated with nitrite had a lower force and cytosolic calcium concentration during single non-fatiguing contractions at a near-physiological oxygen tension. Nitrite treatment delayed fatigue development during repeated fatiguing isometric contractions at near-physiological, but not at supra-physiological, oxygen tension in combination with better maintenance of myofilament calcium sensitivity and sarcoplasmic reticulum calcium pumping. These findings improve understanding of the mechanisms by which increased skeletal muscle nitrite exposure might be ergogenic and imply that this is related to improved calcium handling. ABSTRACT Dietary nitrate (NO3 - ) supplementation, which increases plasma nitrite (NO2 - ) concentration, has been reported to attenuate skeletal muscle fatigue development. Sarcoplasmic reticulum (SR) calcium (Ca2+ ) release is enhanced in isolated single skeletal muscle fibres following NO3 - supplementation or NO2 - incubation at a supra-physiological P O 2 but it is unclear whether NO2 - incubation can alter Ca2+ handling and fatigue development at a near-physiological P O 2 . We hypothesised that NO2 - treatment would improve Ca2+ handling and delay fatigue at a physiological P O 2 in intact single mouse skeletal muscle fibres. Each muscle fibre was perfused with Tyrode solution pre-equilibrated with either 20% ( P O 2 ∼150 Torr) or 2% O2 ( P O 2 = 15.6 Torr) in the absence and presence of 100 µM NaNO2 . At supra-physiological P O 2 (i.e. 20% O2 ), time to fatigue was lowered by 34% with NaNO2 (control: 257 ± 94 vs. NaNO2 : 159 ± 46 s, Cohen's d = 1.63, P < 0.05), but extended by 21% with NaNO2 at 2% O2 (control: 308 ± 217 vs. NaNO2 : 368 ± 242 s, d = 1.14, P < 0.01). During the fatiguing contraction protocol completed with NaNO2 at 2% O2 , peak cytosolic Ca2+ concentration ([Ca2+ ]c ) was not different (P > 0.05) but [Ca2+ ]c accumulation between contractions was lower, concomitant with a greater SR Ca2+ pumping rate (P < 0.05) compared to the control condition. These results demonstrate that increased exposure to NO2 - blunts fatigue development at near-physiological, but not at supra-physiological, P O 2 through enhancing SR Ca2+ pumping rate in single skeletal muscle fibres. These findings extend our understanding of the mechanisms by which increased NO2 - exposure can mitigate skeletal muscle fatigue development.
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Affiliation(s)
- Stephen J Bailey
- Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK.,School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Paulo G Gandra
- Section of Physiology; Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, University of California, San Diego, CA, USA.,Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (Unicamp), Campinas, Brazil
| | - Andrew M Jones
- Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Michael C Hogan
- Section of Physiology; Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, University of California, San Diego, CA, USA
| | - Leonardo Nogueira
- Section of Physiology; Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, University of California, San Diego, CA, USA.,Instituto de Bioquímica Médica Leopoldo de Meis (Medical Biochemistry Institute Leopoldo de Meis), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Muller PDT, Barbosa GW, O'Donnell DE, Neder JA. Cardiopulmonary and Muscular Interactions: Potential Implications for Exercise (In)tolerance in Symptomatic Smokers Without Chronic Obstructive Pulmonary Disease. Front Physiol 2019; 10:859. [PMID: 31354517 PMCID: PMC6635481 DOI: 10.3389/fphys.2019.00859] [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: 05/03/2019] [Accepted: 06/20/2019] [Indexed: 12/15/2022] Open
Abstract
Smoking and physical inactivity are important preventable causes of disability and early death worldwide. Reduced exercise tolerance has been described in smokers, even in those who do not fulfill the extant physiological criteria for chronic obstructive pulmonary disease (COPD) and are not particularly sedentary. In this context, it is widely accepted that exercise capacity depends on complex cardio-pulmonary interactions which support oxygen (O2) delivery to muscle mitochondria. Although peripheral muscular factors, O2 transport disturbances (including the effects of increased carboxyhemoglobin) and autonomic nervous system unbalance have been emphasized, other derangements have been more recently described, including early microscopic emphysema, pulmonary microvascular disease, ventilatory and gas exchange inefficiency, and left ventricular diastolic dysfunction. Using an integrative physiological approach, the present review summarizes the recent advances in knowledge on the effects of smoking on the lung-heart-muscle axis under the stress of exercise. Special attention is given to the mechanisms connecting physiological abnormalities such as early cardio-pulmonary derangements, inadequate oxygen delivery and utilization, and generalized bioenergetic disturbances at the muscular level with the negative sensations (sense of heightened muscle effort and breathlessness) that may decrease the tolerance of smokers to physical exercise. A deeper understanding of the systemic effects of smoking in subjects who did not (yet) show evidences of COPD and ischemic heart disease - two devastating smoking related diseases - might prove instrumental to fight their ever-growing burden.
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Affiliation(s)
- Paulo de Tarso Muller
- Laboratory of Respiratory Pathophysiology, Respiratory Division, Department of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Gisele Walter Barbosa
- Laboratory of Respiratory Pathophysiology, Respiratory Division, Department of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Denis E O'Donnell
- Laboratory of Clinical Exercise Physiology, Respiratory Investigation Unit, Division of Respiratory and Critical Care Medicine, Department of Medicine, Queen's University, Kingston, ON, Canada
| | - J Alberto Neder
- Laboratory of Clinical Exercise Physiology, Respiratory Investigation Unit, Division of Respiratory and Critical Care Medicine, Department of Medicine, Queen's University, Kingston, ON, Canada
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Trichostatin A inhibits uterine histomorphology alterations induced by cigarette smoke exposure in mice. Life Sci 2019; 228:112-120. [DOI: 10.1016/j.lfs.2019.04.069] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/28/2019] [Accepted: 04/30/2019] [Indexed: 01/07/2023]
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