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Inoue M, Kubota A, Takazawa Y, Nakagawara K, Ishige K, Suzuki Y. 5'-UMP inhibited muscle atrophy due to detraining: a randomized, double-blinded, placebo-controlled, parallel-group comparative study. Front Sports Act Living 2024; 6:1403215. [PMID: 39076851 PMCID: PMC11284071 DOI: 10.3389/fspor.2024.1403215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 07/01/2024] [Indexed: 07/31/2024] Open
Abstract
Purpose A short period of disuse of 1-2 weeks due to factors such as illness or injury can lead to muscle atrophy, affecting both athletic performance and health. Recent research has shown that uridine 5'-monophosphate (5'-UMP) can counteract disuse-induced muscle atrophy by increasing PGC-1α expression and inhibiting atrogin-1 expression. However, the effect of 5'-UMP on disuse muscle atrophy in humans remains unknown. Therefore, the aimed of this study was to explore the effects of 5'-UMP supplementation during detraining on short-term disuse muscle atrophy in healthy men. Methods Following a 6-week resistance training program on upper arm, healthy men were randomized to either a UMP group (n = 11) or a placebo group (n = 10), taking their respective supplements during the 2-week detraining period. Muscle thickness, an indicator of muscle hypertrophy and atrophy, was measured at 3 positions (MT50, MT60, and MT70) at baseline, 1 week, and 2 weeks after detraining. Results Both groups showed a significant decrease in muscle thickness at MT70. The relative decrease was greater in the placebo group (2.4 ± 2.8%) than in the UMP group (0.0 ± 2.0%), significantly (p = 0.034) at 1 week. However, no significant difference was observed at MT50 and MT60. Conclusion After the hypertrophy, 5'-UMP may prevent muscle atrophy due to the detraining within the first week.
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Affiliation(s)
- Mika Inoue
- Juntendo Administration for Sports, Health and Medical Sciences, Juntendo University, Tokyo, Japan
| | - Atsushi Kubota
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - Yuji Takazawa
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
- Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | | | - Kazuya Ishige
- Biochemicals Division, YAMASA Corporation, Chiba, Japan
| | - Yoshio Suzuki
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
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2
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Campisi M, Cannella L, Pavanello S. Cosmic chronometers: Is spaceflight a catalyst for biological ageing? Ageing Res Rev 2024; 95:102227. [PMID: 38346506 DOI: 10.1016/j.arr.2024.102227] [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: 08/21/2023] [Revised: 01/05/2024] [Accepted: 02/06/2024] [Indexed: 02/22/2024]
Abstract
Astronauts returning from space missions often exhibit health issues mirroring age-related conditions, suggesting spaceflight as a potential driver of biological ageing and age-related diseases. To unravel the underlying mechanisms of these conditions, this comprehensive review explores the impact of the space "exposome" on the twelve hallmarks of ageing. Through a meticulous analysis encompassing both space environments and terrestrial analogs, we aim to decipher how different conditions influence ageing hallmarks. Utilizing PubMed, we identified 189 studies and 60 meet screening criteria. Research on biological ageing in space has focused on genomic instability, chronic inflammation, and deregulated nutrient sensing. Spaceflight consistently induces genomic instability, linked to prolonged exposure to ionizing radiation, triggers pro-inflammatory and immune alterations, resembling conditions in isolated simulations. Nutrient sensing pathways reveal increased systemic insulin-like growth-factor-1. Microbiome studies indicate imbalances favoring opportunistic species during spaceflight. Telomere dynamics present intriguing patterns, with lengthening during missions and rapid shortening upon return. Despite a pro-ageing trend, some protective mechanisms emerge. Countermeasures, encompassing dietary adjustments, prebiotics, postbiotics, symbiotics, tailored exercises, meditation, and anti-inflammatory supplements, exhibit potential. Spaceflight's impact on ageing is intricate, with diverse findings challenging established beliefs. Multidisciplinary studies provide guidance for future research in this field.
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Affiliation(s)
- Manuela Campisi
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Luana Cannella
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy
| | - Sofia Pavanello
- Occupational Medicine, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy.
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3
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Signals for Muscular Protein Turnover and Insulin Resistance in Critically Ill Patients: A Narrative Review. Nutrients 2023; 15:nu15051071. [PMID: 36904071 PMCID: PMC10005516 DOI: 10.3390/nu15051071] [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: 01/05/2023] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 02/24/2023] Open
Abstract
Sarcopenia in critically ill patients is a highly prevalent comorbidity. It is associated with a higher mortality rate, length of mechanical ventilation, and probability of being sent to a nursing home after the Intensive Care Unit (ICU). Despite the number of calories and proteins delivered, there is a complex network of signals of hormones and cytokines that affect muscle metabolism and its protein synthesis and breakdown in critically ill and chronic patients. To date, it is known that a higher number of proteins decreases mortality, but the exact amount needs to be clarified. This complex network of signals affects protein synthesis and breakdown. Some hormones regulate metabolism, such as insulin, insulin growth factor glucocorticoids, and growth hormone, whose secretion is affected by feeding states and inflammation. In addition, cytokines are involved, such as TNF-alpha and HIF-1. These hormones and cytokines have common pathways that activate muscle breakdown effectors, such as the ubiquitin-proteasome system, calpain, and caspase-3. These effectors are responsible for protein breakdown in muscles. Many trials have been conducted with hormones with different results but not with nutritional outcomes. This review examines the effect of hormones and cytokines on muscles. Knowing all the signals and pathways that affect protein synthesis and breakdown can be considered for future therapeutics.
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4
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Raffin J, de Souto Barreto P, Le Traon AP, Vellas B, Aubertin-Leheudre M, Rolland Y. Sedentary behavior and the biological hallmarks of aging. Ageing Res Rev 2023; 83:101807. [PMID: 36423885 DOI: 10.1016/j.arr.2022.101807] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 11/09/2022] [Accepted: 11/20/2022] [Indexed: 11/23/2022]
Abstract
While the benefits of physical exercise for a healthy aging are well-recognized, a growing body of evidence shows that sedentary behavior has deleterious health effects independently, to some extent, of physical activity levels. Yet, the increasing prevalence of sedentariness constitutes a major public health issue that contributes to premature aging but the potential cellular mechanisms through which prolonged immobilization may accelerate biological aging remain unestablished. This narrative review summarizes the impact of sedentary behavior using different models of extreme sedentary behaviors including bedrest, unilateral limb suspension and space travel studies, on the hallmarks of aging such as genomic instability, telomere attrition, epigenetic alterations, loss of proteostasis, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem cell exhaustion, and altered intercellular communication. We further highlight the remaining knowledge gaps that need more research in order to promote healthspan extension and to provide future contributions to the field of geroscience.
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Affiliation(s)
- Jérémy Raffin
- Gérontopôle de Toulouse, Institut du Vieillissement, Centre Hospitalo-Universitaire de Toulouse, 37 Allées Jules Guesdes, 31000 Toulouse, France.
| | - Philipe de Souto Barreto
- Gérontopôle de Toulouse, Institut du Vieillissement, Centre Hospitalo-Universitaire de Toulouse, 37 Allées Jules Guesdes, 31000 Toulouse, France; CERPOP UMR 1295, University of Toulouse III, Inserm, UPS, Toulouse, France
| | - Anne Pavy Le Traon
- Institute for Space Medicine and Physiology (MEDES), Neurology Department CHU Toulouse, INSERM U 1297, Toulouse, France
| | - Bruno Vellas
- Gérontopôle de Toulouse, Institut du Vieillissement, Centre Hospitalo-Universitaire de Toulouse, 37 Allées Jules Guesdes, 31000 Toulouse, France; CERPOP UMR 1295, University of Toulouse III, Inserm, UPS, Toulouse, France
| | - Mylène Aubertin-Leheudre
- Département des Sciences de l'activité physique, Faculté des sciences, Université du Québec à Montréal, Montreal, Canada; Centre de recherche, Institut universitaire de gériatrie de Montréal (IUGM), CIUSSS du Centre-Sud-de-l'Île-de-Montréal, Montreal, Canada, Faculté des sciences, Université du Québec à Montréal, Montreal, Canada
| | - Yves Rolland
- Gérontopôle de Toulouse, Institut du Vieillissement, Centre Hospitalo-Universitaire de Toulouse, 37 Allées Jules Guesdes, 31000 Toulouse, France; CERPOP UMR 1295, University of Toulouse III, Inserm, UPS, Toulouse, France
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5
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Keeble AR, Brightwell CR, Latham CM, Thomas NT, Mobley CB, Murach KA, Johnson DL, Noehren B, Fry CS. Depressed Protein Synthesis and Anabolic Signaling Potentiate ACL Tear-Resultant Quadriceps Atrophy. Am J Sports Med 2023; 51:81-96. [PMID: 36475881 PMCID: PMC9813974 DOI: 10.1177/03635465221135769] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Anterior cruciate ligament (ACL) tear (ACLT) leads to protracted quadriceps muscle atrophy. Protein turnover largely dictates muscle size and is highly responsive to injury and loading. Regulation of quadriceps molecular protein synthetic machinery after ACLT has largely been unexplored, limiting development of targeted therapies. PURPOSE To define the effect of ACLT on (1) the activation of protein synthetic and catabolic signaling within quadriceps biopsy specimens from human participants and (2) the time course of alterations to protein synthesis and its molecular regulation in a mouse ACL injury model. STUDY DESIGN Descriptive laboratory study. METHODS Muscle biopsy specimens were obtained from the ACL-injured and noninjured vastus lateralis of young adult humans after an overnight fast (N = 21; mean ± SD, 19 ± 5 years). Mice had their limbs assigned to ACLT or control, and whole quadriceps were collected 6 hours or 1, 3, or 7 days after injury with puromycin injected before tissue collection for assessment of relative protein synthesis. Muscle fiber size and expression and phosphorylation of protein anabolic and catabolic signaling proteins were assessed at the protein and transcript levels (RNA sequencing). RESULTS Human quadriceps showed reduced phosphorylation of ribosomal protein S6 (-41%) in the ACL-injured limb (P = .008), in addition to elevated phosphorylation of eukaryotic initiation factor 2α (+98%; P = .006), indicative of depressed protein anabolic signaling in the injured limb. No differences in E3 ubiquitin ligase expression were noted. Protein synthesis was lower at 1 day (P = .01 vs control limb) and 3 days (P = .002 vs control limb) after ACLT in mice. Pathway analyses revealed shared molecular alterations between human and mouse quadriceps after ACLT. CONCLUSION (1) Global protein synthesis and anabolic signaling deficits occur in the quadriceps in response to ACL injury, without notable changes in measured markers of muscle protein catabolism. (2) Importantly, these deficits occur before the onset of significant atrophy, underscoring the need for early intervention. CLINICAL RELEVANCE These findings suggest that blunted protein anabolism as opposed to increased catabolism likely mediates quadriceps atrophy after ACL injury. Thus, future interventions should aim to restore muscle protein anabolism rapidly after ACLT.
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Affiliation(s)
- Alexander R. Keeble
- Department of Physiology, College of Medicine, University of Kentucky
- Center for Muscle Biology, University of Kentucky
| | - Camille R. Brightwell
- Center for Muscle Biology, University of Kentucky
- Department of Athletic Training and Clinical Nutrition, University of Kentucky
| | - Christine M. Latham
- Center for Muscle Biology, University of Kentucky
- Department of Athletic Training and Clinical Nutrition, University of Kentucky
| | - Nicholas T. Thomas
- Center for Muscle Biology, University of Kentucky
- Department of Athletic Training and Clinical Nutrition, University of Kentucky
| | - C. Brooks Mobley
- Department of Physiology, College of Medicine, University of Kentucky
- Center for Muscle Biology, University of Kentucky
| | - Kevin A. Murach
- Center for Muscle Biology, University of Kentucky
- Department of Physical Therapy, University of Kentucky
| | - Darren L. Johnson
- Department of Orthopaedic Surgery & Sports Medicine, University of Kentucky
| | - Brian Noehren
- Center for Muscle Biology, University of Kentucky
- Department of Physical Therapy, University of Kentucky
- Department of Orthopaedic Surgery & Sports Medicine, University of Kentucky
| | - Christopher S. Fry
- Center for Muscle Biology, University of Kentucky
- Department of Athletic Training and Clinical Nutrition, University of Kentucky
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6
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Bouredji Z, Argaw A, Frenette J. The inflammatory response, a mixed blessing for muscle homeostasis and plasticity. Front Physiol 2022; 13:1032450. [PMID: 36505042 PMCID: PMC9726740 DOI: 10.3389/fphys.2022.1032450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/10/2022] [Indexed: 11/24/2022] Open
Abstract
Skeletal muscle makes up almost half the body weight of heathy individuals and is involved in several vital functions, including breathing, thermogenesis, metabolism, and locomotion. Skeletal muscle exhibits enormous plasticity with its capacity to adapt to stimuli such as changes in mechanical loading, nutritional interventions, or environmental factors (oxidative stress, inflammation, and endocrine changes). Satellite cells and timely recruited inflammatory cells are key actors in muscle homeostasis, injury, and repair processes. Conversely, uncontrolled recruitment of inflammatory cells or chronic inflammatory processes leads to muscle atrophy, fibrosis and, ultimately, impairment of muscle function. Muscle atrophy and loss of function are reported to occur either in physiological situations such as aging, cast immobilization, and prolonged bed rest, as well as in many pathological situations, including cancers, muscular dystrophies, and several other chronic illnesses. In this review, we highlight recent discoveries with respect to the molecular mechanisms leading to muscle atrophy caused by modified mechanical loading, aging, and diseases. We also summarize current perspectives suggesting that the inflammatory process in muscle homeostasis and repair is a double-edged sword. Lastly, we review recent therapeutic approaches for treating muscle wasting disorders, with a focus on the RANK/RANKL/OPG pathway and its involvement in muscle inflammation, protection and regeneration processes.
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Affiliation(s)
- Zineb Bouredji
- Centre Hospitalier Universitaire de Québec, Centre de Recherche du Centre Hospitalier de l’Université Laval (CRCHUQ-CHUL), Axe Neurosciences, Université Laval, Quebec City, QC, Canada
| | - Anteneh Argaw
- Centre Hospitalier Universitaire de Québec, Centre de Recherche du Centre Hospitalier de l’Université Laval (CRCHUQ-CHUL), Axe Neurosciences, Université Laval, Quebec City, QC, Canada
| | - Jérôme Frenette
- Centre Hospitalier Universitaire de Québec, Centre de Recherche du Centre Hospitalier de l’Université Laval (CRCHUQ-CHUL), Axe Neurosciences, Université Laval, Quebec City, QC, Canada,Département de Réadaptation, Faculté de Médecine, Université Laval, Quebec City, QC, Canada,*Correspondence: Jérôme Frenette,
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7
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Kitahata K, Uchida T, Taniguchi R, Kato A, Sugiura K, Sakakibara I, Oarada M, Fukawa T, Junsoo P, Inho C, Nikawa T. Additional effects of simultaneous treatment with C14-Cblin and celastrol on the clinorotation-induced rat L6 myotube atrophy. THE JOURNAL OF MEDICAL INVESTIGATION 2022; 69:127-134. [PMID: 35466134 DOI: 10.2152/jmi.69.127] [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: 11/14/2022]
Abstract
Two novel reagents, N-myristoylated Cbl-b inhibitory peptide (C14-Cblin) and celastrol, a quinone methide triterpene, are reported to be effective in preventing myotube atrophy. The combined effects of C14-Cblin and celastrol on rat L6 myotubes atrophy induced by 3D-clinorotation, a simulated microgravity model, was investigated in the present study. We first examined their effects on expression in atrogenes. Increase in MAFbx1/atrogin-1 and MuRF-1 by 3D-clinorotation was significantly suppressed by treatment with C14-Cblin or celastrol, but there was no additive effect of simultaneous treatment. However, celastrol significantly suppressed the upregulation of Cbl-b and HSP70 by 3D-clinorotation. Whereas 3D-clinorotation decreased the protein level of IRS-1 in L6 myotubes, C14-Cblin and celastrol inhibited the degradation of IRS-1. C14-Cblin and celastrol promoted the phosphorylation of FOXO3a even in microgravity condition. Simultaneous administration of C14-Cblin and celastrol had shown little additive effect in reversing the impairment of IGF-1 signaling by 3D-clinorotation. While 3D-clinorotation-induced marked oxidative stress in L6 myotubes, celastrol suppressed 3D-clinorotation-induced ROS production. Finally, the C14-Cblin and celastrol-treated groups were inhibited decrease in L6 myotube diameter and increased the protein content of slow-twitch MyHC cultured under 3D-clinorotation. The simultaneous treatment of C14-Cblin and celastrol additively prevented 3D-clinorotation-induced myotube atrophy than single treatment. J. Med. Invest. 69 : 127-134, February, 2022.
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Affiliation(s)
- Kanako Kitahata
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Takayuki Uchida
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Runa Taniguchi
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Ayano Kato
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Kosuke Sugiura
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan.,Department of Orthopedics, Institute of Medical Biosciences, Tokushima University Graduate School, Tokushima, 770-8503, Japan
| | - Iori Sakakibara
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Motoko Oarada
- Department of Nutrition Health, Faculty of Nutritional Science Sagami Women's University, Sagamihara, Kanagawa, 252-0383, Japan
| | - Tomoya Fukawa
- Department of Urology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
| | - Park Junsoo
- Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Wonju, Gangwon-Do, Republic of Korea
| | - Choi Inho
- Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Wonju, Gangwon-Do, Republic of Korea
| | - Takeshi Nikawa
- Departments of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770-8503, Japan
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8
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Trinity JD, Drummond MJ, Fermoyle CC, McKenzie AI, Supiano MA, Richardson RS. Cardiovasomobility: an integrative understanding of how disuse impacts cardiovascular and skeletal muscle health. J Appl Physiol (1985) 2022; 132:835-861. [PMID: 35112929 PMCID: PMC8934676 DOI: 10.1152/japplphysiol.00607.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cardiovasomobility is a novel concept that encompasses the integration of cardiovascular and skeletal muscle function in health and disease with critical modification by physical activity, or lack thereof. Compelling evidence indicates that physical activity improves health while a sedentary, or inactive, lifestyle accelerates cardiovascular and skeletal muscle dysfunction and hastens disease progression. Identifying causative factors for vascular and skeletal muscle dysfunction, especially in humans, has proven difficult due to the limitations associated with cross-sectional investigations. Therefore, experimental models of physical inactivity and disuse, which mimic hospitalization, injury, and illness, provide important insight into the mechanisms and consequences of vascular and skeletal muscle dysfunction. This review provides an overview of the experimental models of disuse and inactivity and focuses on the integrated responses of the vasculature and skeletal muscle in response to disuse/inactivity. The time course and magnitude of dysfunction evoked by various models of disuse/inactivity are discussed in detail, and evidence in support of the critical roles of mitochondrial function and oxidative stress are presented. Lastly, strategies aimed at preserving vascular and skeletal muscle dysfunction during disuse/inactivity are reviewed. Within the context of cardiovasomobility, experimental manipulation of physical activity provides valuable insight into the mechanisms responsible for vascular and skeletal muscle dysfunction that limit mobility, degrade quality of life, and hasten the onset of disease.
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Affiliation(s)
- Joel D Trinity
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Micah J Drummond
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah.,Department of Physical Therapy, University of Utah, Salt Lake City, Utah
| | - Caitlin C Fermoyle
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Alec I McKenzie
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Mark A Supiano
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Russell S Richardson
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
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9
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Sharlo K, Tyganov SA, Tomilovskaya E, Popov DV, Saveko AA, Shenkman BS. Effects of Various Muscle Disuse States and Countermeasures on Muscle Molecular Signaling. Int J Mol Sci 2021; 23:ijms23010468. [PMID: 35008893 PMCID: PMC8745071 DOI: 10.3390/ijms23010468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/24/2021] [Accepted: 12/30/2021] [Indexed: 12/17/2022] Open
Abstract
Skeletal muscle is capable of changing its structural parameters, metabolic rate and functional characteristics within a wide range when adapting to various loading regimens and states of the organism. Prolonged muscle inactivation leads to serious negative consequences that affect the quality of life and work capacity of people. This review examines various conditions that lead to decreased levels of muscle loading and activity and describes the key molecular mechanisms of muscle responses to these conditions. It also details the theoretical foundations of various methods preventing adverse muscle changes caused by decreased motor activity and describes these methods. A number of recent studies presented in this review make it possible to determine the molecular basis of the countermeasure methods used in rehabilitation and space medicine for many years, as well as to identify promising new approaches to rehabilitation and to form a holistic understanding of the mechanisms of gravity force control over the muscular system.
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10
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Wilburn D, Ismaeel A, Machek S, Fletcher E, Koutakis P. Shared and distinct mechanisms of skeletal muscle atrophy: A narrative review. Ageing Res Rev 2021; 71:101463. [PMID: 34534682 DOI: 10.1016/j.arr.2021.101463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/30/2021] [Accepted: 09/11/2021] [Indexed: 12/15/2022]
Abstract
Maintenance of skeletal muscle mass and function is an incredibly nuanced balance of anabolism and catabolism that can become distorted within different pathological conditions. In this paper we intend to discuss the distinct intracellular signaling events that regulate muscle protein atrophy for a given clinical occurrence. Aside from the common outcome of muscle deterioration, several conditions have at least one or more distinct mechanisms that creates unique intracellular environments that facilitate muscle loss. The subtle individuality to each of these given pathologies can provide both researchers and clinicians with specific targets of interest to further identify and increase the efficacy of medical treatments and interventions.
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Affiliation(s)
- Dylan Wilburn
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76706, USA
| | - Ahmed Ismaeel
- Department of Biology, Baylor University, Waco, TX 76706, USA
| | - Steven Machek
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76706, USA
| | - Emma Fletcher
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76706, USA; Department of Biology, Baylor University, Waco, TX 76706, USA
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11
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Lee EJ, Neppl RL. Influence of Age on Skeletal Muscle Hypertrophy and Atrophy Signaling: Established Paradigms and Unexpected Links. Genes (Basel) 2021; 12:genes12050688. [PMID: 34063658 PMCID: PMC8147613 DOI: 10.3390/genes12050688] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/16/2022] Open
Abstract
Skeletal muscle atrophy in an inevitable occurrence with advancing age, and a consequence of disease including cancer. Muscle atrophy in the elderly is managed by a regimen of resistance exercise and increased protein intake. Understanding the signaling that regulates muscle mass may identify potential therapeutic targets for the prevention and reversal of muscle atrophy in metabolic and neuromuscular diseases. This review covers the major anabolic and catabolic pathways that regulate skeletal muscle mass, with a focus on recent progress and potential new players.
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12
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Kashirina DN, Brzhozovskiy AG, Pastushkova LK, Kononikhin AS, Borchers CH, Nikolaev EN, Larina IM. Semiquantitative Proteomic Research of Protein Plasma Profile of Volunteers in 21-Day Head-Down Bed Rest. Front Physiol 2020; 11:678. [PMID: 32848806 PMCID: PMC7396636 DOI: 10.3389/fphys.2020.00678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/26/2020] [Indexed: 01/22/2023] Open
Affiliation(s)
- Daria N Kashirina
- Institute of Biomedical Problems-Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Alexander G Brzhozovskiy
- Institute of Biomedical Problems-Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia.,CDISE, Skolkovo Institute of Science and Technology, Moscow, Russia
| | - Ludmila Kh Pastushkova
- Institute of Biomedical Problems-Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Alexey S Kononikhin
- Institute of Biomedical Problems-Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia.,CDISE, Skolkovo Institute of Science and Technology, Moscow, Russia
| | - Christoph H Borchers
- CDISE, Skolkovo Institute of Science and Technology, Moscow, Russia.,Department Oncology, Faculty of Medicine, McGill University, Montreal, QC, Canada
| | | | - Irina M Larina
- Institute of Biomedical Problems-Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
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13
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Lynch GM, Murphy CH, Castro EDM, Roche HM. Inflammation and metabolism: the role of adiposity in sarcopenic obesity. Proc Nutr Soc 2020; 79:1-13. [PMID: 32669148 DOI: 10.1017/s0029665120007119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sarcopenic obesity is characterised by the double burden of diminished skeletal muscle mass and the presence of excess adiposity. From a mechanistic perspective, both obesity and sarcopenia are associated with sub-acute, chronic pro-inflammatory states that impede metabolic processes, disrupting adipose and skeletal functionality, which may potentiate disease. Recent evidence suggests that there is an important cross-talk between metabolism and inflammation, which has shifted focus upon metabolic-inflammation as a key emerging biological interaction. Dietary intake, physical activity and nutritional status are important environmental factors that may modulate metabolic-inflammation. This paradigm will be discussed within the context of sarcopenic obesity risk. There is a paucity of data in relation to the nature and the extent to which nutritional status affects metabolic-inflammation in sarcopenic obesity. Research suggests that there may be scope for the modulation of sarcopenic obesity with alterations in diet. The potential impact of increasing protein consumption and reconfiguration of dietary fat composition in human dietary interventions are evaluated. This review will explore emerging data with respect to if and how different dietary components may modulate metabolic-inflammation, particularly with respect to adiposity, within the context of sarcopenic obesity.
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Affiliation(s)
- G M Lynch
- Nutrigenomics Research Group, School of Public Health, Physiotherapy and Sports Science, UCD Institute of Food and Health, Diabetes Complications Research Centre, University College Dublin, Dublin, Ireland
| | - C H Murphy
- Nutrigenomics Research Group, School of Public Health, Physiotherapy and Sports Science, UCD Institute of Food and Health, Diabetes Complications Research Centre, University College Dublin, Dublin, Ireland
| | - E de Marco Castro
- Nutrigenomics Research Group, School of Public Health, Physiotherapy and Sports Science, UCD Institute of Food and Health, Diabetes Complications Research Centre, University College Dublin, Dublin, Ireland
| | - H M Roche
- Nutrigenomics Research Group, School of Public Health, Physiotherapy and Sports Science, UCD Institute of Food and Health, Diabetes Complications Research Centre, University College Dublin, Dublin, Ireland
- Institute for Global Food Security, Queen's University Belfast, Belfast, UK
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14
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Ehmsen JT, Höke A. Cellular and molecular features of neurogenic skeletal muscle atrophy. Exp Neurol 2020; 331:113379. [PMID: 32533969 DOI: 10.1016/j.expneurol.2020.113379] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 05/26/2020] [Accepted: 06/08/2020] [Indexed: 12/28/2022]
Abstract
Neurogenic atrophy refers to the loss of muscle mass and function that results directly from injury or disease of the peripheral nervous system. Individuals with neurogenic atrophy may experience reduced functional status and quality of life and, in some circumstances, reduced survival. Distinct pathological findings on muscle histology can aid in diagnosis of a neurogenic cause for muscle dysfunction, and provide indicators for the chronicity of denervation. Denervation induces pleiotypic responses in skeletal muscle, and the molecular mechanisms underlying neurogenic muscle atrophy appear to share common features with other causes of muscle atrophy, including activation of FOXO transcription factors and corresponding induction of ubiquitin-proteasomal and lysosomal degradation. In this review, we provide an overview of histologic features of neurogenic atrophy and a summary of current understanding of underlying mechanisms.
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Affiliation(s)
- Jeffrey T Ehmsen
- Department of Neurology, Neuromuscular Division, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Ahmet Höke
- Department of Neurology, Neuromuscular Division, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA.
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15
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Fernandez‐Gonzalo R, Tesch PA, Lundberg TR, Alkner BA, Rullman E, Gustafsson T. Three months of bed rest induce a residual transcriptomic signature resilient to resistance exercise countermeasures. FASEB J 2020; 34:7958-7969. [DOI: 10.1096/fj.201902976r] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/19/2020] [Accepted: 03/29/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Rodrigo Fernandez‐Gonzalo
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, and Unit of Clinical Physiology Karolinska University Hospital Stockholm Sweden
| | - Per A. Tesch
- Department of Physiology & Pharmacology Karolinska Institutet Stockholm Sweden
| | - Tommy R. Lundberg
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, and Unit of Clinical Physiology Karolinska University Hospital Stockholm Sweden
| | - Björn A. Alkner
- Department of Orthopaedics Region Jönköping County Eksjö Sweden
- Department of Biomedical and Clinical Sciences Linköping University Linköping Sweden
| | - Eric Rullman
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, and Unit of Clinical Physiology Karolinska University Hospital Stockholm Sweden
| | - Thomas Gustafsson
- Department of Laboratory Medicine, Division of Clinical Physiology, Karolinska Institutet, and Unit of Clinical Physiology Karolinska University Hospital Stockholm Sweden
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16
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Abstract
Skeletal muscle atrophy is a common side effect of most human diseases. Muscle loss is not only detrimental for the quality of life but it also dramatically impairs physiological processes of the organism and decreases the efficiency of medical treatments. While hypothesized for years, the existence of an atrophying programme common to all pathologies is still incompletely solved despite the discovery of several actors and key regulators of muscle atrophy. More than a decade ago, the discovery of a set of genes, whose expression at the mRNA levels were similarly altered in different catabolic situations, opened the way of a new concept: the presence of atrogenes, i.e. atrophy-related genes. Importantly, the atrogenes are referred as such on the basis of their mRNA content in atrophying muscles, the regulation at the protein level being sometimes more complicate to elucidate. It should be noticed that the atrogenes are markers of atrophy and that their implication as active inducers of atrophy is still an open question for most of them. While the atrogene family has grown over the years, it has mostly been incremented based on data coming from rodent models. Whether the rodent atrogenes are valid for humans still remain to be established. An "atrogene" was originally defined as a gene systematically up- or down-regulated in several catabolic situations. Even if recent works often restrict this notion to the up-regulation of a limited number of proteolytic enzymes, it is important to keep in mind the big picture view. In this review, we provide an update of the validated and potential rodent atrogenes and the metabolic pathways they belong, and based on recent work, their relevance in human physio-pathological situations. We also propose a more precise definition of the atrogenes that integrates rapid recovery when catabolic stimuli are stopped or replaced by anabolic ones.
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Affiliation(s)
- Daniel Taillandier
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, F-63000, Clermont-Ferrand, France.
| | - Cécile Polge
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, F-63000, Clermont-Ferrand, France
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17
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Park YM, Keller AC, Runchey SS, Miller BF, Kohrt WM, Van Pelt RE, Kang C, Jankowski CM, Moreau KL. Acute estradiol treatment reduces skeletal muscle protein breakdown markers in early- but not late-postmenopausal women. Steroids 2019; 146:43-49. [PMID: 30928279 PMCID: PMC6679593 DOI: 10.1016/j.steroids.2019.03.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/12/2019] [Accepted: 03/24/2019] [Indexed: 01/31/2023]
Abstract
OBJECTIVES Menopause and decline in estradiol (E2) may contribute to sarcopenia (i.e., age-related decline in muscle mass and strength) in women. E2 may directly impact skeletal muscle protein breakdown via estrogen receptor (ER) signaling, primarily ERα. It is not yet known whether: 1) E2 regulates pathways of skeletal muscle protein breakdown; 2) E2-mediated changes in protein breakdown markers are associated with ERα activation and insulin sensitivity; and 3) the effects of E2 on protein breakdown markers differ by increasing time since menopause. STUDY DESIGN We studied 27 women who were ≤6 years past menopause (early postmenopausal, EPM; n = 13) or ≥10 years past menopause (late postmenopausal, LPM; n = 14). Fasted skeletal muscle samples were collected following 1 week of transdermal E2 or placebo treatment in a randomized cross-over design. MAIN OUTCOME MEASURES We analyzed for cytosolic protein content of the: 1) structural proteins myosin heavy chain (MHC) and tropomyosin; and 2) protein regulatory markers: protein kinase B (Akt), muscle-specific ring finger protein1 (MuRF1), atrogin1, and forkhead box O3 (FOXO3) using Western blot. RESULTS In response to acute E2, FOXO3 activation (dephosphorylation) and MuRF1 protein expression decreased in EPM but increased in LPM women (p < 0.05). ERα activation was not associated with these protein breakdown markers, but FOXO3 activation tended to be inversely correlated (r = -0.318, p = 0.065) to insulin sensitivity. CONCLUSIONS These preliminary studies suggest the effects of E2 on skeletal muscle protein breakdown markers were dependent on time since menopause, which is consistent with our previous study on insulin sensitivity.
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Affiliation(s)
- Young-Min Park
- Department of Medicine, Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Amy C Keller
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Shauna S Runchey
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Benjamin F Miller
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO, USA
| | - Wendy M Kohrt
- Department of Medicine, Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; VA Eastern Colorado Health Care System, Geriatric Research Education and Clinical Center (GRECC), Denver, CO, USA
| | - Rachael E Van Pelt
- Department of Medicine, Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; VA Eastern Colorado Health Care System, Geriatric Research Education and Clinical Center (GRECC), Denver, CO, USA
| | - Chounghun Kang
- Department of Physical Education, Inha University, Incheon, South Korea
| | - Catherine M Jankowski
- Department of Medicine, Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; College of Nursing, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Kerrie L Moreau
- Department of Medicine, Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; VA Eastern Colorado Health Care System, Geriatric Research Education and Clinical Center (GRECC), Denver, CO, USA.
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18
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Hiramoto S, Yahata N, Saitoh K, Yoshimura T, Wang Y, Taniyama S, Nikawa T, Tachibana K, Hirasaka K. Dietary supplementation with alkylresorcinols prevents muscle atrophy through a shift of energy supply. J Nutr Biochem 2018; 61:147-154. [PMID: 30236871 DOI: 10.1016/j.jnutbio.2018.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 08/03/2018] [Accepted: 08/16/2018] [Indexed: 12/11/2022]
Abstract
It has been reported that phytoextracts that contain alkylresorcinols (ARs) protect against severe myofibrillar degeneration found in isoproterenol-induced myocardial infarction. In this study, we examined the effect of dietary ARs derived from wheat bran extracts on muscle atrophy in denervated mice. The mice were divided into the following four groups: (1) sham-operated (control) mice fed with normal diet (S-ND), (2) denervated mice fed with normal diet (D-ND), (3) control mice fed with ARs-supplemented diet (S-AR) and (4) denervated mice fed with ARs-supplemented diet (D-AR). The intake of ARs prevented the denervation-induced reduction of the weight of the hind limb muscles and the myofiber size. However, the expression of ubiquitin ligases and autophagy-related genes, which is associated with muscle proteolysis, was slightly higher in D-AR than in D-ND. Moreover, the abundance of the autophagy marker p62 was significantly higher in D-AR than in D-ND. Muscle atrophy has been known to be associated with a disturbed energy metabolism. The expression of pyruvate dehydrogenase kinase 4 (PDK4), which is related to fatty acid metabolism, was decreased in D-ND as compared with that in S-ND. In contrast, dietary supplementation with ARs inhibited the decrease of PDK4 expression caused by denervation. Furthermore, the abnormal expression pattern of genes related to the abundance of lipid droplets-coated proteins that was induced by denervation was improved by ARs. These results raise the possibility that dietary supplementation with ARs modifies the disruption of fatty acid metabolism induced by lipid autophagy, resulting in the prevention of muscle atrophy.
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Affiliation(s)
- Shigeru Hiramoto
- Healthcare Research Center, Nisshin Pharma Inc., Saitama, Japan 3568511
| | - Nobuhiro Yahata
- Healthcare Research Center, Nisshin Pharma Inc., Saitama, Japan 3568511
| | - Kanae Saitoh
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan 8528521
| | - Tomohiro Yoshimura
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan 8528521
| | - Yao Wang
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan 8528521
| | - Shigeto Taniyama
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan 8528521
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Medical School, Tokushima, Japan 7708503
| | - Katsuyasu Tachibana
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan 8528521
| | - Katsuya Hirasaka
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan 8528521; Organization for Marine Science and Technology, Nagasaki University, Nagasaki, Japan 8528521.
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19
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Rullman E, Fernandez-Gonzalo R, Mekjavić IB, Gustafsson T, Eiken O. MEF2 as upstream regulator of the transcriptome signature in human skeletal muscle during unloading. Am J Physiol Regul Integr Comp Physiol 2018; 315:R799-R809. [PMID: 29995456 DOI: 10.1152/ajpregu.00452.2017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Our understanding of skeletal muscle structural and functional alterations during unloading has increased in recent decades, yet the molecular mechanisms underpinning these changes have only started to be unraveled. The purpose of the current investigation was to assess changes in skeletal muscle gene expression after 21 days of bed rest, with a particular focus on predicting upstream regulators of muscle disuse. Additionally, the association between differential microRNA expression and the transcriptome signature of bed rest were investigated. mRNAs from musculus vastus lateralis biopsies obtained from 12 men before and after the bed rest were analyzed using a microarray. There were 54 significantly upregulated probesets after bed rest, whereas 103 probesets were downregulated (false discovery rate 10%; fold-change cutoff ≥1.5). Among the upregulated genes, transcripts related to denervation-induced alterations in skeletal muscle were identified, e.g., acetylcholine receptor subunit delta and perinatal myosin. The most downregulated transcripts were functionally enriched for mitochondrial genes and genes involved in mitochondrial biogenesis, followed by a large number of contractile fiber components. Upstream regulator analysis identified a robust inhibition of the myocyte enhancer factor-2 (MEF2) family, in particular MEF2C, which was suggested to act upstream of several key downregulated genes, most notably peroxisome proliferator-activated receptor γ coactivator 1-α (PGC-1α)/peroxisome proliferator-activated receptors (PPARs) and CRSP3. Only a few microRNAs were identified as playing a role in the overall transcriptome picture induced by sustained bed rest. Our results suggest that the MEF2 family is a key regulator underlying the transcriptional signature of bed rest and, hence, ultimately also skeletal muscle alterations induced by systemic unloading in humans.
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Affiliation(s)
- Eric Rullman
- Department of Laboratory Medicine, Clinical Physiology, Karolinska Institutet and Karolinska University Hospital , Stockholm , Sweden.,Department of Cardiology, Karolinska University Hospital , Stockholm , Sweden
| | - Rodrigo Fernandez-Gonzalo
- Department of Laboratory Medicine, Clinical Physiology, Karolinska Institutet and Karolinska University Hospital , Stockholm , Sweden
| | - Igor B Mekjavić
- Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute , Ljubljana , Slovenia
| | - Thomas Gustafsson
- Department of Laboratory Medicine, Clinical Physiology, Karolinska Institutet and Karolinska University Hospital , Stockholm , Sweden
| | - Ola Eiken
- Department of Environmental Physiology, Swedish Aerospace Physiology Centre, KTH Royal Institute of Technology , Stockholm , Sweden
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20
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Uchida T, Sakashita Y, Kitahata K, Yamashita Y, Tomida C, Kimori Y, Komatsu A, Hirasaka K, Ohno A, Nakao R, Higashitani A, Higashibata A, Ishioka N, Shimazu T, Kobayashi T, Okumura Y, Choi I, Oarada M, Mills EM, Teshima-Kondo S, Takeda S, Tanaka E, Tanaka K, Sokabe M, Nikawa T. Reactive oxygen species upregulate expression of muscle atrophy-associated ubiquitin ligase Cbl-b in rat L6 skeletal muscle cells. Am J Physiol Cell Physiol 2018. [DOI: 10.1152/ajpcell.00184.2017] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Unloading-mediated muscle atrophy is associated with increased reactive oxygen species (ROS) production. We previously demonstrated that elevated ubiquitin ligase casitas B-lineage lymphoma-b (Cbl-b) resulted in the loss of muscle volume (Nakao R, Hirasaka K, Goto J, Ishidoh K, Yamada C, Ohno A, Okumura Y, Nonaka I, Yasutomo K, Baldwin KM, Kominami E, Higashibata A, Nagano K, Tanaka K, Yasui N, Mills EM, Takeda S, Nikawa T. Mol Cell Biol 29: 4798–4811, 2009). However, the pathological role of ROS production associated with unloading-mediated muscle atrophy still remains unknown. Here, we showed that the ROS-mediated signal transduction caused by microgravity or its simulation contributes to Cbl-b expression. In L6 myotubes, the assessment of redox status revealed that oxidized glutathione was increased under microgravity conditions, and simulated microgravity caused a burst of ROS, implicating ROS as a critical upstream mediator linking to downstream atrophic signaling. ROS generation activated the ERK1/2 early-growth response protein (Egr)1/2-Cbl-b signaling pathway, an established contributing pathway to muscle volume loss. Interestingly, antioxidant treatments such as N-acetylcysteine and TEMPOL, but not catalase, blocked the clinorotation-mediated activation of ERK1/2. The increased ROS induced transcriptional activity of Egr1 and/or Egr2 to stimulate Cbl-b expression through the ERK1/2 pathway in L6 myoblasts, since treatment with Egr1/2 siRNA and an ERK1/2 inhibitor significantly suppressed clinorotation-induced Cbl-b and Egr expression, respectively. Promoter and gel mobility shift assays revealed that Cbl-b was upregulated via an Egr consensus oxidative responsive element at −110 to −60 bp of the Cbl-b promoter. Together, this indicates that under microgravity conditions, elevated ROS may be a crucial mechanotransducer in skeletal muscle cells, regulating muscle mass through Cbl-b expression activated by the ERK-Egr signaling pathway.
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Affiliation(s)
- Takayuki Uchida
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Yoshihiro Sakashita
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Kanako Kitahata
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Yui Yamashita
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Chisato Tomida
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Yuki Kimori
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Akio Komatsu
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Katsuya Hirasaka
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki, Japan
| | - Ayako Ohno
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Reiko Nakao
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Biological Clock Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | | | - Akira Higashibata
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan
| | - Noriaki Ishioka
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan
| | | | - Takeshi Kobayashi
- Department of Physiology, Nagoya University, School of Medicine, Nagoya, Japan
| | - Yuushi Okumura
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Faculty of Nutritional Science, Sagami Women’s University, Kanagawa, Japan
| | - Inho Choi
- Institute of Space Biology, Yonsei University, Wonju, South Korea
| | - Motoko Oarada
- Faculty of Nutritional Science, Sagami Women’s University, Kanagawa, Japan
| | - Edward M. Mills
- Division of Pharmacology/Toxicology, College of Pharmacy, University of Texas, Austin, Texas
| | - Shigetada Teshima-Kondo
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Department of Nutrition, Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, Osaka, Japan
| | - Shin’ichi Takeda
- Translational Research Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Eiji Tanaka
- Department of Orthodontic Dentistry, Institute of Medical Biosciences, Tokushima University Graduate School, Tokushima, Japan
| | - Keiji Tanaka
- Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Masahiro Sokabe
- Department of Physiology, Nagoya University, School of Medicine, Nagoya, Japan
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
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21
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Gao Y, Arfat Y, Wang H, Goswami N. Muscle Atrophy Induced by Mechanical Unloading: Mechanisms and Potential Countermeasures. Front Physiol 2018; 9:235. [PMID: 29615929 PMCID: PMC5869217 DOI: 10.3389/fphys.2018.00235] [Citation(s) in RCA: 149] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 03/02/2018] [Indexed: 12/23/2022] Open
Abstract
Prolonged periods of skeletal muscle inactivity or mechanical unloading (bed rest, hindlimb unloading, immobilization, spaceflight and reduced step) can result in a significant loss of musculoskeletal mass, size and strength which ultimately lead to muscle atrophy. With advancement in understanding of the molecular and cellular mechanisms involved in disuse skeletal muscle atrophy, several different signaling pathways have been studied to understand their regulatory role in this process. However, substantial gaps exist in our understanding of the regulatory mechanisms involved, as well as their functional significance. This review aims to update the current state of knowledge and the underlying cellular mechanisms related to skeletal muscle loss during a variety of unloading conditions, both in humans and animals. Recent advancements in understanding of cellular and molecular mechanisms, including IGF1-Akt-mTOR, MuRF1/MAFbx, FOXO, and potential triggers of disuse atrophy, such as calcium overload and ROS overproduction, as well as their role in skeletal muscle protein adaptation to disuse is emphasized. We have also elaborated potential therapeutic countermeasures that have shown promising results in preventing and restoring disuse-induced muscle loss. Finally, identified are the key challenges in this field as well as some future prospectives.
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Affiliation(s)
- Yunfang Gao
- Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Ministry of Education, Northwest University, Xi'an, China
| | - Yasir Arfat
- Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Ministry of Education, Northwest University, Xi'an, China
| | - Huiping Wang
- Key Laboratory of Resource Biology and Biotechnology in Western China, College of Life Sciences, Ministry of Education, Northwest University, Xi'an, China
| | - Nandu Goswami
- Physiology Unit, Otto Loewi Center of Research for Vascular Biology, Immunity and Inflammation, Medical University of Graz, Graz, Austria
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22
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Ferrando B, Gomez-Cabrera MC, Salvador-Pascual A, Puchades C, Derbré F, Gratas-Delamarche A, Laparre L, Olaso-Gonzalez G, Cerda M, Viosca E, Alabajos A, Sebastiá V, Alberich-Bayarri A, García-Castro F, Viña J. Allopurinol partially prevents disuse muscle atrophy in mice and humans. Sci Rep 2018; 8:3549. [PMID: 29476130 PMCID: PMC5824846 DOI: 10.1038/s41598-018-21552-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 02/07/2018] [Indexed: 12/31/2022] Open
Abstract
Disuse muscle wasting will likely affect everyone in his or her lifetime in response to pathologies such as joint immobilization, inactivity or bed rest. There are no good therapies to treat it. We previously found that allopurinol, a drug widely used to treat gout, protects muscle damage after exhaustive exercise and results in functional gains in old individuals. Thus, we decided to test its effect in the prevention of soleus muscle atrophy after two weeks of hindlimb unloading in mice, and lower leg immobilization following ankle sprain in humans (EudraCT: 2011-003541-17). Our results show that allopurinol partially protects against muscle atrophy in both mice and humans. The protective effect of allopurinol is similar to that of resistance exercise which is the best-known way to prevent muscle mass loss in disuse human models. We report that allopurinol protects against the loss of muscle mass by inhibiting the expression of ubiquitin ligases. Our results suggest that the ubiquitin-proteasome pathway is an appropriate therapeutic target to inhibit muscle wasting and emphasizes the role of allopurinol as a non-hormonal intervention to treat disuse muscle atrophy.
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Affiliation(s)
- Beatriz Ferrando
- Danish Center for Molecular Gerontology and Danish Aging Research Center, Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark.,Freshage Research Group, Department of Physiology. Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - Mari Carmen Gomez-Cabrera
- Freshage Research Group, Department of Physiology. Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain.
| | - Andrea Salvador-Pascual
- Freshage Research Group, Department of Physiology. Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - Carlos Puchades
- Servicio de Oncología Médica, Hospital La Fe, Valencia, Spain
| | - Frederic Derbré
- Laboratory of Movement Sport and Health Sciences (M2S), University Rennes 2-ENS, Rennes, France
| | | | - Ludovic Laparre
- Laboratory of Movement Sport and Health Sciences (M2S), University Rennes 2-ENS, Rennes, France
| | - Gloria Olaso-Gonzalez
- Freshage Research Group, Department of Physiology. Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - Miguel Cerda
- Department of Pathology, University of Valencia, Valencia, Spain
| | - Enrique Viosca
- Servicio de Medicina Física y Rehabilitación, Hospital La Fe, Valencia, Spain
| | - Ana Alabajos
- Servicio de Medicina Física y Rehabilitación, Hospital La Fe, Valencia, Spain
| | - Vicente Sebastiá
- Clinica Ypsilon de medicina física y rehabilitación, Valencia, Spain
| | - Angel Alberich-Bayarri
- GIBI 230 (Biomedical Imaging Research Group), La Fe Health Research Institute, Valencia, Spain.,QUIBIM SL, Valencia, Spain
| | | | - Jose Viña
- Freshage Research Group, Department of Physiology. Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
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Hashimoto R, Sakai A, Murayama M, Ochi A, Abe T, Hirasaka K, Ohno A, Teshima-Kondo S, Yanagawa H, Yasui N, Inatsugi M, Doi D, Takeda M, Mukai R, Terao J, Nikawa T. Effects of dietary soy protein on skeletal muscle volume and strength in humans with various physical activities. THE JOURNAL OF MEDICAL INVESTIGATION 2017; 62:177-83. [PMID: 26399344 DOI: 10.2152/jmi.62.177] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND In recent years, the number of bedridden people is rapidly increasing due to aging or lack of exercise in Japan. This problem is becoming more serious, since there is no countermeasure against it. In the present study, we designed to investigate whether dietary proteins, especially soy, had beneficial effects on skeletal muscle in 59 volunteers with various physical activities. METHODS We subjected 59 volunteers with various physical activities to meal intervention examination. Persons with low and high physical activities were divided into two dietary groups, the casein diet group and the soy diet group. They ate daily meals supplemented with 7.8 g of powdered casein or soy protein isolate every day for 30 days. Bedridden patients in hospitals were further divided into three dietary groups: the no supplementation diet group, the casein diet group and the soy diet group. They were also subjected to a blood test, a urinalysis, magnetic resonance imaging analysis and muscle strength test of the knee before and after the meal intervention study. RESULTS Thirty-day soy protein supplementation significantly increased skeletal muscle volume in participants with low physical activity, compared with 30-day casein protein supplementation. Both casein and soy protein supplementation increased the volume of quadriceps femoris muscle in bedridden patients. Consistently, soy protein significantly increased their extension power of the knee, compared with casein protein. Although casein protein increased skeletal muscle volume more than soy protein in bedridden patients, their muscle strength changes by soy protein supplementation were bigger than those by casein protein supplementation. CONCLUSIONS The supplementation of soy protein would be one of the effective foods which prevent the skeletal muscle atrophy caused by immobilization or unloading.
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Affiliation(s)
- Rie Hashimoto
- Department of Nutritional Physiology, Institute of Health Biosciences, the University of Tokushima
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Kononikhin AS, Starodubtseva NL, Pastushkova LK, Kashirina DN, Fedorchenko KY, Brhozovsky AG, Popov IA, Larina IM, Nikolaev EN. Spaceflight induced changes in the human proteome. Expert Rev Proteomics 2016; 14:15-29. [PMID: 27817217 DOI: 10.1080/14789450.2017.1258307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
INTRODUCTION Spaceflight is one of the most extreme conditions encountered by humans: Individuals are exposed to radiation, microgravity, hypodynamia, and will experience isolation. A better understanding of the molecular processes induced by these factors may allow us to develop personalized countermeasures to minimize risks to astronauts. Areas covered: This review is a summary of literature searches from PubMed, NASA, Roskosmos and the authors' research experiences and opinions. The review covers the available proteomic data on the effects of spaceflight factors on the human body, including both real space missions and ground-based model experiments. Expert commentary: Overall, the authors believe that the present background, methodology and equipment improvements will enhance spaceflight safety and support accumulation of new knowledge on how organisms adapt to extreme conditions.
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Affiliation(s)
- Alexey S Kononikhin
- a Institute of Biomedical Problems - Russian Federation State Scientific Research Center, Laboratory of proteomics , Russian Academy of Sciences , Moscow , Russia.,b Moscow Institute of Physics and Technology , Laboratory of ion and molecular physics , Moscow , Russia.,d V.L. Talrose Institute for Energy Problems of Chemical Physics , Laboratory of ion and molecular physics, Russian Academy of Sciences , Moscow , Russia
| | - Natalia L Starodubtseva
- b Moscow Institute of Physics and Technology , Laboratory of ion and molecular physics , Moscow , Russia.,c V. I. Kulakov Research Center for Obstetrics, Gynecology and Perinatology , Laboratory of proteomics and metabolomics, Ministry of Healthcare of the Russian Federation , Moscow , Russia.,d V.L. Talrose Institute for Energy Problems of Chemical Physics , Laboratory of ion and molecular physics, Russian Academy of Sciences , Moscow , Russia
| | - Lyudmila Kh Pastushkova
- a Institute of Biomedical Problems - Russian Federation State Scientific Research Center, Laboratory of proteomics , Russian Academy of Sciences , Moscow , Russia
| | - Daria N Kashirina
- a Institute of Biomedical Problems - Russian Federation State Scientific Research Center, Laboratory of proteomics , Russian Academy of Sciences , Moscow , Russia
| | | | - Alexander G Brhozovsky
- a Institute of Biomedical Problems - Russian Federation State Scientific Research Center, Laboratory of proteomics , Russian Academy of Sciences , Moscow , Russia
| | - Igor A Popov
- b Moscow Institute of Physics and Technology , Laboratory of ion and molecular physics , Moscow , Russia.,c V. I. Kulakov Research Center for Obstetrics, Gynecology and Perinatology , Laboratory of proteomics and metabolomics, Ministry of Healthcare of the Russian Federation , Moscow , Russia.,d V.L. Talrose Institute for Energy Problems of Chemical Physics , Laboratory of ion and molecular physics, Russian Academy of Sciences , Moscow , Russia
| | - Irina M Larina
- a Institute of Biomedical Problems - Russian Federation State Scientific Research Center, Laboratory of proteomics , Russian Academy of Sciences , Moscow , Russia
| | - Evgeny N Nikolaev
- d V.L. Talrose Institute for Energy Problems of Chemical Physics , Laboratory of ion and molecular physics, Russian Academy of Sciences , Moscow , Russia.,e Emanuel Institute for Biochemical Physics , Russian Academy of Sciences , Moscow , Russia.,f Skolkovo Institute of Science and Technology, Space Cluster , Skolkovo , Russia
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Pierre N, Appriou Z, Gratas-Delamarche A, Derbré F. From physical inactivity to immobilization: Dissecting the role of oxidative stress in skeletal muscle insulin resistance and atrophy. Free Radic Biol Med 2016; 98:197-207. [PMID: 26744239 DOI: 10.1016/j.freeradbiomed.2015.12.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 12/23/2015] [Accepted: 12/24/2015] [Indexed: 12/16/2022]
Abstract
In the literature, the terms physical inactivity and immobilization are largely used as synonyms. The present review emphasizes the need to establish a clear distinction between these two situations. Physical inactivity is a behavior characterized by a lack of physical activity, whereas immobilization is a deprivation of movement for medical purpose. In agreement with these definitions, appropriate models exist to study either physical inactivity or immobilization, leading thereby to distinct conclusions. In this review, we examine the involvement of oxidative stress in skeletal muscle insulin resistance and atrophy induced by, respectively, physical inactivity and immobilization. A large body of evidence demonstrates that immobilization-induced atrophy depends on the chronic overproduction of reactive oxygen and nitrogen species (RONS). On the other hand, the involvement of RONS in physical inactivity-induced insulin resistance has not been investigated. This observation outlines the need to elucidate the mechanism by which physical inactivity promotes insulin resistance.
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Affiliation(s)
- Nicolas Pierre
- EA1274 Laboratory "Movement, Sport and Health Sciences" M2S, Rennes 2 University - ENS Rennes, Bruz, France
| | - Zephyra Appriou
- EA1274 Laboratory "Movement, Sport and Health Sciences" M2S, Rennes 2 University - ENS Rennes, Bruz, France
| | - Arlette Gratas-Delamarche
- EA1274 Laboratory "Movement, Sport and Health Sciences" M2S, Rennes 2 University - ENS Rennes, Bruz, France
| | - Frédéric Derbré
- EA1274 Laboratory "Movement, Sport and Health Sciences" M2S, Rennes 2 University - ENS Rennes, Bruz, France.
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Cho SH, Kim JH, Song W. In Vivo Rodent Models of Skeletal Muscle Adaptation to Decreased Use. Endocrinol Metab (Seoul) 2016; 31:31-7. [PMID: 26996420 PMCID: PMC4803558 DOI: 10.3803/enm.2016.31.1.31] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 01/17/2016] [Accepted: 01/25/2016] [Indexed: 12/25/2022] Open
Abstract
Skeletal muscle possesses plasticity and adaptability to external and internal physiological changes. Due to these characteristics, skeletal muscle shows dramatic changes depending on its response to stimuli such as physical activity, nutritional changes, disease status, and environmental changes. Modulation of the rate of protein synthesis/degradation plays an important role in atrophic responses. The purpose of this review is to describe different features of skeletal muscle adaptation with various models of deceased use. In this review, four models were addressed: immobilization, spinal cord transection, hindlimb unloading, and aging. Immobilization is a form of decreased use in which skeletal muscle shows electrical activity, tension development, and motion. These results differ by muscle group. Spinal cord transection was selected to simulate spinal cord injury. Similar to the immobilization model, dramatic atrophy occurs in addition to fiber type conversion in this model. Despite the fact that electromyography shows unremarkable changes in muscle after hindlimb unloading, decreased muscle mass and contractile force are observed. Lastly, aging significantly decreases the numbers of muscle fibers and motor units. Skeletal muscle responses to decreased use include decreased strength, decreased fiber numbers, and fiber type transformation. These four models demonstrated different changes in the skeletal muscle. This review elucidates the different skeletal muscle adaptations in these four decreased use animal models and encourages further studies.
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Affiliation(s)
- Su Han Cho
- Health and Exercise Science Laboratory, Institute of Sport Science, Seoul National University, Seoul, Korea
| | - Jang Hoe Kim
- Health and Exercise Science Laboratory, Institute of Sport Science, Seoul National University, Seoul, Korea
| | - Wook Song
- Health and Exercise Science Laboratory, Institute of Sport Science, Seoul National University, Seoul, Korea
- Institute on Aging, Seoul National University, Seoul, Korea.
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Abstract
Protein quality control (proteostasis) depends on constant protein degradation and resynthesis, and is essential for proper homeostasis in systems from single cells to whole organisms. Cells possess several mechanisms and processes to maintain proteostasis. At one end of the spectrum, the heat shock proteins modulate protein folding and repair. At the other end, the proteasome and autophagy as well as other lysosome-dependent systems, function in the degradation of dysfunctional proteins. In this review, we examine how these systems interact to maintain proteostasis. Both the direct cellular data on heat shock control over autophagy and the time course of exercise-associated changes in humans support the model that heat shock response and autophagy are tightly linked. Studying the links between exercise stress and molecular control of proteostasis provides evidence that the heat shock response and autophagy coordinate and undergo sequential activation and downregulation, and that this is essential for proper proteostasis in eukaryotic systems.
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Key Words
- AKT, v-akt murine thymoma viral oncogene homolog 1
- AMPK, adenosine monophosphate-activated protein kinase
- ATG, autophagy-related
- BECN1, Beclin 1, autophagy related
- EIF4EBP1, eukaryotic translation initiation factor 4E binding protein 1
- ER, endoplasmic reticulum
- FOXO, forkhead box O
- HSF1, heat shock transcription factor 1
- HSP, heat shock protein
- HSP70
- HSPA8/HSC70, heat shock 70kDa protein 8
- IL, interleukin
- LC3, MAP1LC3, microtubule-associated protein 1 light chain 3
- MTMR14/hJumpy, myotubularin related protein 14
- MTOR, mechanistic target of rapamycin
- NR1D1/Rev-Erb-α, nuclear receptor subfamily 1, group D, member 1
- PBMC, peripheral blood mononuclear cell
- PPARGC1A/PGC-1α, peroxisome proliferator-activated receptor, gamma, coactivator 1 α
- RHEB, Ras homolog enriched in brain
- SOD, superoxide dismutase
- SQSTM1/p62, sequestosome 1
- TPR, translocated promoter region, nuclear basket protein
- TSC, tuberous sclerosis complex
- ULK1, unc-51 like autophagy activating kinase 1
- autophagy
- exercise
- heat shock response
- humans
- protein breakdown
- protein synthesis
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Affiliation(s)
- Karol Dokladny
- a Department of Internal Medicine; Health Sciences Center; Health, Exercise & Sports Science of University of New Mexico ; Albuquerque , NM USA
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Vibration mechanosignals superimposed to resistive exercise result in baseline skeletal muscle transcriptome profiles following chronic disuse in bed rest. Sci Rep 2015; 5:17027. [PMID: 26596638 PMCID: PMC4657004 DOI: 10.1038/srep17027] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/21/2015] [Indexed: 01/08/2023] Open
Abstract
Disuse-induced muscle atrophy is a major concern in aging, in neuromuscular diseases, post-traumatic injury and in microgravity life sciences affecting health and fitness also of crew members in spaceflight. By using a laboratory analogue to body unloading we perform for the first time global gene expression profiling joined to specific proteomic analysis to map molecular adaptations in disused (60 days of bed rest) human soleus muscle (CTR) and in response to a resistive exercise (RE) countermeasure protocol without and with superimposed vibration mechanosignals (RVE). Adopting Affymetrix GeneChip technology we identified 235 differently transcribed genes in the CTR group (end- vs. pre-bed rest). RE comprised 206 differentially expressed genes, whereas only 51 changed gene transcripts were found in RVE. Most gene transcription and proteomic changes were linked to various key metabolic pathways (glycolysis, oxidative phosphorylation, tricarboxylic acid (TCA) cycle, lipid metabolism) and to functional contractile structures. Gene expression profiling in bed rest identified a novel set of genes explicitly responsive to vibration mechanosignals in human soleus. This new finding highlights the efficacy of RVE protocol in reducing key signs of disuse maladaptation and atrophy, and to maintain a close-to-normal skeletal muscle quality outcome following chronic disuse in bed rest.
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Tintignac LA, Brenner HR, Rüegg MA. Mechanisms Regulating Neuromuscular Junction Development and Function and Causes of Muscle Wasting. Physiol Rev 2015; 95:809-52. [DOI: 10.1152/physrev.00033.2014] [Citation(s) in RCA: 224] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The neuromuscular junction is the chemical synapse between motor neurons and skeletal muscle fibers. It is designed to reliably convert the action potential from the presynaptic motor neuron into the contraction of the postsynaptic muscle fiber. Diseases that affect the neuromuscular junction may cause failure of this conversion and result in loss of ambulation and respiration. The loss of motor input also causes muscle wasting as muscle mass is constantly adapted to contractile needs by the balancing of protein synthesis and protein degradation. Finally, neuromuscular activity and muscle mass have a major impact on metabolic properties of the organisms. This review discusses the mechanisms involved in the development and maintenance of the neuromuscular junction, the consequences of and the mechanisms involved in its dysfunction, and its role in maintaining muscle mass during aging. As life expectancy is increasing, loss of muscle mass during aging, called sarcopenia, has emerged as a field of high medical need. Interestingly, aging is also accompanied by structural changes at the neuromuscular junction, suggesting that the mechanisms involved in neuromuscular junction maintenance might be disturbed during aging. In addition, there is now evidence that behavioral paradigms and signaling pathways that are involved in longevity also affect neuromuscular junction stability and sarcopenia.
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Affiliation(s)
- Lionel A. Tintignac
- Biozentrum, University of Basel, Basel, Switzerland; Department of Biomedicine, University of Basel, Basel, Switzerland; and INRA, UMR866 Dynamique Musculaire et Métabolisme, Montpellier, France
| | - Hans-Rudolf Brenner
- Biozentrum, University of Basel, Basel, Switzerland; Department of Biomedicine, University of Basel, Basel, Switzerland; and INRA, UMR866 Dynamique Musculaire et Métabolisme, Montpellier, France
| | - Markus A. Rüegg
- Biozentrum, University of Basel, Basel, Switzerland; Department of Biomedicine, University of Basel, Basel, Switzerland; and INRA, UMR866 Dynamique Musculaire et Métabolisme, Montpellier, France
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30
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Yuan L, Han J, Meng Q, Xi Q, Zhuang Q, Jiang Y, Han Y, Zhang B, Fang J, Wu G. Muscle-specific E3 ubiquitin ligases are involved in muscle atrophy of cancer cachexia: an in vitro and in vivo study. Oncol Rep 2015; 33:2261-8. [PMID: 25760630 DOI: 10.3892/or.2015.3845] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 02/09/2015] [Indexed: 11/06/2022] Open
Abstract
Muscle atrophy F-Box (MAFbx)/atrogin-1 and muscle ring-finger-1 (MuRF-1) have been identified as two muscle-specific E3 ubiquitin ligases that are highly expressed in skeletal muscle during muscle atrophy. However, the role of muscle-specific E3 ubiquitin ligases during the process of muscle atrophy of cancer cachexia remains largely unknown. In the present study, we analyzed the expression of atrogin-1 and MuRF-1 in the skeletal muscle of patients with malignant and benign disease. The possible mechanisms were studied both in a colon 26-induced cancer cachexia mouse model and in tumor necrosis factor-α (TNF-α) induced atrophy C2C12 cells. Our results demonstrated that atrogin-1 and MuRF-1 tended to be increased in the skeletal muscle of patients with malignant disease even before weight loss. Non-tumor body weights and gastrocnemius weights were significantly decreased while expression levels of ubiquitin proteasome pathway associated genes (atrogin-1, MuRF-1, ubiquitin and E2-14K) were upregulated in cancer cachexia mice. Significant myotube atrophy with atrogin-1 overexpression was observed in the C2C12 cells treated with TNF-α. Meanwhile, knockdown of atrogin-1 by small interfering RNA (siRNA) protected C2C12 cells from the adverse effect of TNF-α. In conclusion, muscle-specific E3 ubiquitin ligases were upregulated during cancer cachexia, and atrogin-1 may be a potential molecular target for treating muscle atrophy induced by cancer cachexia.
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Affiliation(s)
- Lei Yuan
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Jun Han
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Qingyang Meng
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Qiulei Xi
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Qiulin Zhuang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Yi Jiang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Yusong Han
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Bo Zhang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Jing Fang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, P.R. China
| | - Guohao Wu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, P.R. China
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31
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Ochi A, Abe T, Nakao R, Yamamoto Y, Kitahata K, Takagi M, Hirasaka K, Ohno A, Teshima-Kondo S, Taesik G, Choi I, Kawamura T, Nemoto H, Mukai R, Terao J, Nikawa T. N-myristoylated ubiquitin ligase Cbl-b inhibitor prevents on glucocorticoid-induced atrophy in mouse skeletal muscle. Arch Biochem Biophys 2015; 570:23-31. [PMID: 25689493 DOI: 10.1016/j.abb.2015.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/16/2015] [Accepted: 02/06/2015] [Indexed: 12/12/2022]
Abstract
A DGpYMP peptide mimetic of tyrosine(608)-phosphorylated insulin receptor substrate-1 (IRS-1), named Cblin, was previously shown to significantly inhibit Cbl-b-mediated IRS-1 ubiquitination. In the present study, we developed N-myristoylated Cblin and investigated whether it was effective in preventing glucocorticoid-induced muscle atrophy. Using HEK293 cells overexpressing Cbl-b, IRS-1 and ubiquitin, we showed that the 50% inhibitory concentrations of Cbl-b-mediated IRS-1 ubiquitination by N-myristoylated Cblin and Cblin were 30 and 120 μM, respectively. Regarding the DEX-induced atrophy of C2C12 myotubes, N-myristoylated Cblin was more effective than Cblin for inhibiting the DEX-induced decreases in C2C12 myotube diameter and IRS-1 degradation. The inhibitory efficacy of N-myristoylated Cblin on IRS-1 ubiquitination in C2C12 myotubes was approximately fourfold larger than that of Cblin. Furthermore, N-myristoylation increased the incorporation of Cblin into HEK293 cells approximately 10-folds. Finally, we demonstrated that N-myristoylated Cblin prevented the wet weight loss, IRS-1 degradation, and MAFbx/atrogin-1 and MuRF-1 expression in gastrocnemius muscle of DEX-treated mice approximately fourfold more effectively than Cblin. Taken together, these results suggest that N-myristoylated Cblin prevents DEX-induced skeletal muscle atrophy in vitro and in vivo, and that N-myristoylated Cblin more effectively prevents muscle atrophy than unmodified Cblin.
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Affiliation(s)
- Arisa Ochi
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Tomoki Abe
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Reiko Nakao
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan; National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8566, Japan
| | - Yoriko Yamamoto
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Kanako Kitahata
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Marina Takagi
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Katsuya Hirasaka
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Ayako Ohno
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Shigetada Teshima-Kondo
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Gwag Taesik
- Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Yonsei, Republic of Korea
| | - Inho Choi
- Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Yonsei, Republic of Korea
| | - Tomoyuki Kawamura
- Department of Pharmaceutical Chemistry, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Hisao Nemoto
- Department of Pharmaceutical Chemistry, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Rie Mukai
- Department of Food Science, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Junji Terao
- Department of Food Science, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima 770-8503, Japan.
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Abstract
Muscle RING finger 1 (MuRF1) and muscle atrophy F-box (MAFbx)/atrogin-1 were identified more than 10 years ago as two muscle-specific E3 ubiquitin ligases that are increased transcriptionally in skeletal muscle under atrophy-inducing conditions, making them excellent markers of muscle atrophy. In the past 10 years much has been published about MuRF1 and MAFbx with respect to their mRNA expression patterns under atrophy-inducing conditions, their transcriptional regulation, and their putative substrates. However, much remains to be learned about the physiological role of both genes in the regulation of mass and other cellular functions in striated muscle. Although both MuRF1 and MAFbx are enriched in skeletal, cardiac, and smooth muscle, this review will focus on the current understanding of MuRF1 and MAFbx in skeletal muscle, highlighting the critical questions that remain to be answered.
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Affiliation(s)
- Sue C Bodine
- Departments of Neurobiology, Physiology, and Behavior and Physiology and Membrane Biology, University of California Davis, Davis, California; and Northern California Veterans Affairs Health Systems, Mather, California
| | - Leslie M Baehr
- Membrane Biology, University of California Davis, Davis, California; and
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Batt J, Ahmed SS, Correa J, Bain A, Granton J. Skeletal muscle dysfunction in idiopathic pulmonary arterial hypertension. Am J Respir Cell Mol Biol 2014; 50:74-86. [PMID: 23972212 DOI: 10.1165/rcmb.2012-0506oc] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Despite improvements in survival with disease-targeted therapies, the majority of patients with pulmonary arterial hypertension (PAH) have persistent exercise intolerance that results from impaired cardiac function and skeletal muscle dysfunction. Our intent was to understand the molecular mechanisms mediating skeletal muscle dysfunction in PAH. A total of 12 patients with PAH and 10 matched control subjects were assessed. Patients with PAH demonstrated diminished exercise capacity (lower oxygen uptake max, lower anaerobic threshold and higher minute ventilation/CO2) compared with control subjects. Quadriceps muscle cross-sectional area was significantly smaller in patients with PAH. The vastus lateralis muscle was biopsied to enable muscle fiber morphometric assessment and to determine expression levels/activation of proteins regulating (1) muscle mass, (2) mitochondria biogenesis and shaping machinery, and (3) excitation-contraction coupling. Patients with PAH demonstrated a decreased type I/type II muscle fiber ratio, with a smaller cross-sectional area in the type I fibers. Diminished AKT and p70S6 kinase phosphorylation, with increased atrogin-1 and muscle RING-finger protein-1 transcript levels, were evident in the PAH muscle, suggesting engagement of cellular signaling networks stimulating ubiquitin-proteasome-mediated proteolysis of muscle, with concurrent depression of networks mediating muscle hypertrophy. Although there were no differences in expression/activation of proteins associated with mitochondrial biogenesis or fission (MTCO2 [cytochrome C oxidase subunit II]/succinate dehydrogenase flavoprotein subunit A, mitochondrial transcription factor A, nuclear respiratory factor-1/dynamin-related protein 1 phosphorylation), protein levels of a positive regulator of mitochondrial fusion, Mitofusin2, were significantly lower in patients with PAH. Patients with PAH demonstrated increased phosphorylation of ryanodine receptor 1 receptors, suggesting that altered sarcoplasmic reticulum Ca(++) sequestration may impair excitation-contraction coupling in the PAH muscle. These data suggest that muscle dysfunction in PAH results from a combination of muscle atrophy and intrinsically impaired contractility.
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Affiliation(s)
- Jane Batt
- 1 Keenan Research Center, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada; and
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Jespersen JG, Mikkelsen UR, Nedergaard A, Thorlund JB, Schjerling P, Suetta C, Christensen PA, Aagaard P. Alterations in molecular muscle mass regulators after 8 days immobilizing Special Forces mission. Scand J Med Sci Sports 2014; 25:175-83. [PMID: 24422600 DOI: 10.1111/sms.12170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2013] [Indexed: 01/01/2023]
Abstract
In military operations, declined physical capacity can endanger the life of soldiers. During special support and reconnaissance (SSR) missions, Special Forces soldiers sustain 1-2 weeks full-body horizontal immobilization, which impairs muscle strength and performance. Adequate muscle mass and strength are necessary in combat or evacuation situations, which prompt for improved understanding of muscle mass modulation during SSR missions. To explore the molecular regulation of myofiber size during a simulated SSR operation, nine male Special Forces soldiers were biopsied in m. vastus lateralis pre and post 8 days immobilizing restricted prone position. After immobilization, total mammalian target of rapamycin protein was reduced by 42% (P < 0.05), whereas total and phosphorylated protein levels of Akt, ribosomal protein S6k, 4E-BP1, and glycogen synthase kinase3β were unchanged. Messenger RNA (mRNA) levels of the atrogenes forkhead box O3 (FoxO3), atrogin1, and muscle ring finger protein1 (MuRF1) increased by 36%, 53%, and 71% (P < 0.01), MuRF1 protein by 51% (P = 0.05), whereas FoxO1 and peroxisome proliferator-activated receptor γ coactivator-1 β mRNAs decreased by 29% and 40% (P < 0.01). In conclusion, occupational immobilization in Special Forces soldiers led to modulations in molecular muscle mass regulators during 8 days prone SSR mission, which likely contribute to muscle loss observed in such operations. The present data expand our knowledge of human muscle mass regulation during short-term immobilization.
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Affiliation(s)
- J G Jespersen
- Institute of Sports Medicine, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Hasselgren PO. β-Hydroxy-β-methylbutyrate (HMB) and prevention of muscle wasting. Metabolism 2014; 63:5-8. [PMID: 24140096 DOI: 10.1016/j.metabol.2013.09.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 01/06/2023]
Affiliation(s)
- Per-Olof Hasselgren
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue ST 919, Boston, MA 02115.
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36
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Bostock EL, Morse CI, Winwood K, McEwan I, Onambélé-Pearson GL. Hypo-activity induced skeletal muscle atrophy and potential nutritional interventions: A review. World J Transl Med 2013; 2:36-48. [DOI: 10.5528/wjtm.v2.i3.36] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 09/07/2013] [Accepted: 11/03/2013] [Indexed: 02/05/2023] Open
Abstract
Periods of hypo-activity result in profound changes in skeletal muscle morphology and strength. This review primarily addresses the differential impact of de-training, bed-rest, limb immobilisation and unilateral lower limb suspension on muscle morphology, strength and fatigability. The degree of muscle atrophy differs depending on the hypo-activity model and the muscles in question, with the leg and postural muscles being the most susceptible to atrophy. Hypo-activity also results in the dramatic loss of strength that often surpasses the loss of muscle mass, and consequently, the nervous system and contractile properties adapt to adjust for this excessive loss of strength. In addition, the degree of muscle strength loss is different depending on the hypo-activity model, with immobilisation appearing to have a greater impact on strength than unloaded models. There is a step-wise difference in the magnitude of muscle loss so that, even after accounting for differential durations of interventions immobilisation ≥ unilateral lower limb suspension ≥ bed-rest ≥ de-training. Muscle fatigability varies between hypo-activity models but the results are equivocal and this may be due to task-specific adaptations. This review also addresses potential nutritional interventions for attenuating hypo-activity induced muscle atrophy and strength declines, in the absence of exercise. Essential amino acid supplementation stands as a strong candidate but other supplements are good contenders for attenuating hypo-activity induced atrophy and strength losses. Several potential nutritional supplements are highlighted that could be used to combat muscle atrophy but extensive research is needed to determine the most effective.
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Wall BT, Dirks ML, van Loon LJC. Skeletal muscle atrophy during short-term disuse: implications for age-related sarcopenia. Ageing Res Rev 2013; 12:898-906. [PMID: 23948422 DOI: 10.1016/j.arr.2013.07.003] [Citation(s) in RCA: 256] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 07/11/2013] [Accepted: 07/29/2013] [Indexed: 12/25/2022]
Abstract
Situations such as the recovery from injury and illness can lead to enforced periods of muscle disuse or unloading. Such circumstances lead to rapid skeletal muscle atrophy, loss of functional strength and a multitude of related negative health consequences. The elderly population is particularly vulnerable to the acute challenges of muscle disuse atrophy. Any loss of skeletal muscle mass must be underpinned by a chronic imbalance between muscle protein synthesis and breakdown rates. It is recognized that muscle atrophy during prolonged (>10 days) disuse is brought about primarily by declines in post-absorptive and post-prandial muscle protein synthesis rates, without a clear contribution from changes in muscle protein breakdown. Few data are available on the impact of short-term disuse (<10 days) on muscle protein turnover in humans. However, indirect evidence indicates that considerable muscle atrophy occurs during this early phase, and is likely attributed to a rapid increase in muscle protein breakdown accompanied by the characteristic decline in muscle protein synthesis. Short-term disuse atrophy is of particular relevance in the development of sarcopenia, as it has been suggested that successive short periods of muscle disuse, due to sickness or injury, accumulate throughout an individual's lifespan and contributes considerably to the net muscle loss observed with aging. Research is warranted to elucidate the physiological and molecular basis for rapid muscle loss during short periods of disuse. Such mechanistic insight will allow the characterization of nutritional, exercise and/or pharmacological interventions to prevent or attenuate muscle loss during periods of disuse and therefore aid in the treatment of age-related sarcopenia.
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Affiliation(s)
- Benjamin T Wall
- Department of Human Movement Sciences, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
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Abe T, Hirasaka K, Kagawa S, Kohno S, Ochi A, Utsunomiya K, Sakai A, Ohno A, Teshima-Kondo S, Okumura Y, Oarada M, Maekawa Y, Terao J, Mills EM, Nikawa T. Cbl-b is a critical regulator of macrophage activation associated with obesity-induced insulin resistance in mice. Diabetes 2013; 62:1957-69. [PMID: 23349502 PMCID: PMC3661636 DOI: 10.2337/db12-0677] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 01/17/2013] [Indexed: 12/19/2022]
Abstract
We previously reported the potential involvement of casitas B-cell lymphoma-b (Cbl-b) in aging-related murine insulin resistance. Because obesity also induces macrophage recruitment into adipose tissue, we elucidated here the role of Cbl-b in obesity-related insulin resistance. Cbl-b(+/+) and Cbl-b(-/-) mice were fed a high-fat diet (HFD) and then examined for obesity-related changes in insulin signaling. The HFD caused recruitment of macrophages into adipose tissue and increased inflammatory reaction in Cbl-b(-/-) compared with Cbl-b(+/+) mice. Peritoneal macrophages from Cbl-b(-/-) mice and Cbl-b-overexpressing RAW264.7 macrophages were used to examine the direct effect of saturated fatty acids (FAs) on macrophage activation. In macrophages, Cbl-b suppressed saturated FA-induced Toll-like receptor 4 (TLR4) signaling by ubiquitination and degradation of TLR4. The physiological role of Cbl-b in vivo was also examined by bone marrow transplantation and Eritoran, a TLR4 antagonist. Hematopoietic cell-specific depletion of the Cbl-b gene induced disturbed responses on insulin and glucose tolerance tests. Blockade of TLR4 signaling by Eritoran reduced fasting blood glucose and serum interleukin-6 levels in obese Cbl-b(-/-) mice. These results suggest that Cbl-b deficiency could exaggerate HFD-induced insulin resistance through saturated FA-mediated macrophage activation. Therefore, inhibition of TLR4 signaling is an attractive therapeutic strategy for treatment of obesity-related insulin resistance.
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Affiliation(s)
- Tomoki Abe
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Katsuya Hirasaka
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Sachiko Kagawa
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Shohei Kohno
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Arisa Ochi
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Kenro Utsunomiya
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Atsuko Sakai
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Ayako Ohno
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Shigetada Teshima-Kondo
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yuushi Okumura
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Motoko Oarada
- Medical Mycology Research Center, The University of Chiba, Chiba, Japan
| | - Yoichi Maekawa
- Department of Immunology and Parasitology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Junji Terao
- Department of Food Science, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Edward M. Mills
- Pharmacology/Toxicology, College of Pharmacy, University of Texas at Austin, Austin, Texas
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Abstract
PURPOSE OF REVIEW ICU-acquired weakness (ICUAW) is now recognized as a major complication of critical illness. There is no doubt that ICUAW is prevalent - some might argue ubiquitous - after critical illness, but its true role, the interaction with preexisting nerve and muscle lesions as well as its contribution to long-term functional disability, remains to be elucidated. RECENT FINDINGS In this article, we review the current state-of-the-art of the basic pathophysiology of nerve and muscle weakness after critical illness and explore the current literature on ICUAW with a special emphasis on the most important mechanisms of weakness. SUMMARY Variable contributions of structural and functional changes likely contribute to both early and late myopathy and neuropathy, although the specifics of the temporality of both processes, and the influence patient comorbidities, age, and nature of the ICU insult have on them, remain to be determined.
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Abe T, Kohno S, Yama T, Ochi A, Suto T, Hirasaka K, Ohno A, Teshima-Kondo S, Okumura Y, Oarada M, Choi I, Mukai R, Terao J, Nikawa T. Soy Glycinin Contains a Functional Inhibitory Sequence against Muscle-Atrophy-Associated Ubiquitin Ligase Cbl-b. Int J Endocrinol 2013; 2013:907565. [PMID: 23762056 PMCID: PMC3677654 DOI: 10.1155/2013/907565] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 04/07/2013] [Accepted: 04/22/2013] [Indexed: 11/23/2022] Open
Abstract
Background. Unloading stress induces skeletal muscle atrophy. We have reported that Cbl-b ubiquitin ligase is a master regulator of unloading-associated muscle atrophy. The present study was designed to elucidate whether dietary soy glycinin protein prevents denervation-mediated muscle atrophy, based on the presence of inhibitory peptides against Cbl-b ubiquitin ligase in soy glycinin protein. Methods. Mice were fed either 20% casein diet, 20% soy protein isolate diet, 10% glycinin diet containing 10% casein, or 20% glycinin diet. One week later, the right sciatic nerve was cut. The wet weight, cross sectional area (CSA), IGF-1 signaling, and atrogene expression in hindlimb muscles were examined at 1, 3, 3.5, or 4 days after denervation. Results. 20% soy glycinin diet significantly prevented denervation-induced decreases in muscle wet weight and myofiber CSA. Furthermore, dietary soy protein inhibited denervation-induced ubiquitination and degradation of IRS-1 in tibialis anterior muscle. Dietary soy glycinin partially suppressed the denervation-mediated expression of atrogenes, such as MAFbx/atrogin-1 and MuRF-1, through the protection of IGF-1 signaling estimated by phosphorylation of Akt-1. Conclusions. Soy glycinin contains a functional inhibitory sequence against muscle-atrophy-associated ubiquitin ligase Cbl-b. Dietary soy glycinin protein significantly prevented muscle atrophy after denervation in mice.
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Affiliation(s)
- Tomoki Abe
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Shohei Kohno
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Tomonari Yama
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Arisa Ochi
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Takuro Suto
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Katsuya Hirasaka
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Ayako Ohno
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Shigetada Teshima-Kondo
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Yuushi Okumura
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Motoko Oarada
- Medical Mycology Research Center, The University of Chiba, Chiba 260-8673, Japan
| | - Inho Choi
- Division of Biological Science and Technology, College of Science and Technology, Institute of Biomaterials, The University of Yonsei, Wonju 220-710, Republic of Korea
| | - Rie Mukai
- Department of Food Science, Institute of Health Biosciences, The University of Tokushima, Tokushima 770-8503, Japan
| | - Junji Terao
- Department of Food Science, Institute of Health Biosciences, The University of Tokushima, Tokushima 770-8503, Japan
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
- *Takeshi Nikawa:
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41
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Hirasaka K, Maeda T, Ikeda C, Haruna M, Kohno S, Abe T, Ochi A, Mukai R, Oarada M, Eshima-Kondo S, Ohno A, Okumura Y, Terao J, Nikawa T. Isoflavones derived from soy beans prevent MuRF1-mediated muscle atrophy in C2C12 myotubes through SIRT1 activation. J Nutr Sci Vitaminol (Tokyo) 2013; 59:317-24. [PMID: 24064732 DOI: 10.3177/jnsv.59.317] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Proinflammatory cytokines are factors that induce ubiquitin-proteasome-dependent proteolysis in skeletal muscle, causing muscle atrophy. Although isoflavones, as potent antioxidative nutrients, have been known to reduce muscle damage during the catabolic state, the non-antioxidant effects of isoflavones against muscle atrophy are not well known. Here we report on the inhibitory effects of isoflavones such as genistein and daidzein on muscle atrophy caused by tumor necrosis factor (TNF)-α treatment. In C2C12 myotubes, TNF-α treatment markedly elevated the expression of the muscle-specific ubiquitin ligase MuRF1, but not of atrogin-1, leading to myotube atrophy. We found that MuRF1 promoter activity was mediated by acetylation of p65, a subunit of NFκB, a downstream target of the TNF-α signaling pathway; increased MuRF1 promoter activity was abolished by SIRT1, which is associated with deacetylation of p65. Of interest, isoflavones induced expression of SIRT1 mRNA and phosphorylation of AMP kinase, which is well known to stimulate SIRT1 expression, although there was no direct effect on SIRT1 activation. Moreover, isoflavones significantly suppressed MuRF1 promoter activity and myotube atrophy induced by TNF-α in C2C12 myotubes. These results suggest that isoflavones suppress myotube atrophy in skeletal muscle cells through activation of SIRT1 signaling. Thus, the efficacy of isoflavones could provide a novel therapeutic approach against inflammation-related muscle atrophy.
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Affiliation(s)
- Katsuya Hirasaka
- Department of Nutritional Physiology, Institute of Health Biosciences, the University of Tokushima Graduate School
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42
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Maki T, Yamamoto D, Nakanishi S, Iida K, Iguchi G, Takahashi Y, Kaji H, Chihara K, Okimura Y. Branched-chain amino acids reduce hindlimb suspension-induced muscle atrophy and protein levels of atrogin-1 and MuRF1 in rats. Nutr Res 2012; 32:676-83. [PMID: 23084640 DOI: 10.1016/j.nutres.2012.07.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 07/13/2012] [Accepted: 07/18/2012] [Indexed: 12/19/2022]
Abstract
Atrogin-1 and MuRF1, muscle-specific ubiquitin ligases, and autophagy play a role in protein degradation in muscles. We hypothesized that branched-chain amino acids (BCAAs) may decrease atrogin-1, MuRF1, and autophagy, and may have a protective effect on disuse muscle atrophy. To test this hypothesis, we selected hindlimb suspension (HS)-induced muscle atrophy as a model of disuse muscle atrophy because it is an established model to investigate the effects of decreased muscle activity. Sprague-Dawley male rats were assigned to 4 groups: control, HS (14 days), oral BCAA administration (600 mg/[kg day], 22.9% L-isoleucine, 45.8% L-leucine, and 27.6% L-valine), and HS and BCAA administration. After 14 days of the treatment, muscle weights and protein concentrations, cross-sectional area (CSA) of the muscle fibers, atrogin-1 and MuRF1 proteins, and microtubule-associated protein 1 light chain 3 II/I (ratio of LC3 II/I) were measured. Hindlimb suspension significantly reduced soleus muscle weight and CSA of the muscle fibers. Branched-chain amino acid administration partly but significantly reversed the HS-induced decrease in CSA. Hindlimb suspension increased atrogin-1 and MuRF1 proteins, which play a pivotal role in various muscle atrophies. Branched-chain amino acid attenuated the increase in atrogin-1 and MuRF1 in soleus muscles. Hindlimb suspension significantly increased the ratio of LC3 II/I, an indicator of autophagy, whereas BCAA did not attenuate the increase in the ratio of LC3 II/I. These results indicate the possibility that BCAA inhibits HS-induced muscle atrophy, at least in part, via the inhibition of the ubiquitin-proteasome pathway. Oral BCAA administration appears to have the potential to prevent disuse muscle atrophy.
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Affiliation(s)
- Taiki Maki
- Department of Biophysics, Kobe University Graduate School of Health Science, Kobe, Japan
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43
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Brocca L, Cannavino J, Coletto L, Biolo G, Sandri M, Bottinelli R, Pellegrino MA. The time course of the adaptations of human muscle proteome to bed rest and the underlying mechanisms. J Physiol 2012; 590:5211-30. [PMID: 22848045 DOI: 10.1113/jphysiol.2012.240267] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In order to get a comprehensive picture of the complex adaptations of human skeletal muscle to disuse and further the understanding of the underlying mechanisms, we participated in two bed rest campaigns, one lasting 35 days and one 24 days. In the first bed rest (BR) campaign, myofibrillar proteins, metabolic enzymes and antioxidant defence systems were found to be down-regulated both post-8 days and post-35 days BR by proteomic analysis of vastus lateralis muscle samples from nine subjects. Such profound alterations occurred early (post-8 days BR), before disuse atrophy developed, and persisted through BR (post-35 days BR). To understand the mechanisms underlying the protein adaptations observed, muscle biopsies from the second bed rest campaign (nine subjects) were used to evaluate the adaptations of master controllers of the balance between muscle protein breakdown and muscle protein synthesis (MuRF-1 and atrogin-1; Akt and p70S6K), of autophagy (Beclin-1, p62, LC3, bnip3, cathepsin-L), of expression of antioxidant defence systems (NRF2) and of energy metabolism (PGC-1α, SREBP-1, AMPK). The results indicate that: (i) redox imbalance and remodelling of muscle proteome occur early and persist through BR; (ii) impaired energy metabolism is an early and persistent phenomenon comprising both the oxidative and glycolytic one; (iii) although both major catabolic systems, ubiquitin proteasome and autophagy, could contribute to the progression of atrophy late into BR, a decreased protein synthesis cannot be ruled out; (iv) a decreased PGC-1α, with the concurrence of SREBP-1 up-regulation, is a likely trigger of metabolic impairment, whereas the AMPK pathway is unaltered.
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Affiliation(s)
- Lorenza Brocca
- Department of Molecular Medicine, University of Pavia, Via Forlanini 6, 27100 Pavia, Italy
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44
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Various jobs of proteolytic enzymes in skeletal muscle during unloading: facts and speculations. J Biomed Biotechnol 2012; 2012:493618. [PMID: 22496611 PMCID: PMC3303694 DOI: 10.1155/2012/493618] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 10/11/2011] [Accepted: 11/03/2011] [Indexed: 12/19/2022] Open
Abstract
Skeletal muscles, namely, postural muscles, as soleus, suffer from atrophy under disuse. Muscle atrophy development caused by unloading differs from that induced by denervation or other stimuli. Disuse atrophy is supposed to be the result of shift of protein synthesis/proteolysis balance towards protein degradation increase. Maintaining of the balance involves many systems of synthesis and proteolysis, whose activation leads to muscle adaptation to disuse rather than muscle degeneration. Here, we review recent data on activity of signaling systems involved in muscle atrophy development under unloading and muscle adaptation to the lack of support.
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45
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Urso ML. Disuse atrophy of human skeletal muscle: cell signaling and potential interventions. Med Sci Sports Exerc 2011; 41:1860-8. [PMID: 19727028 DOI: 10.1249/mss.0b013e3181a6458a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In response to atrophic stimuli, physical alterations include decreases in fiber diameter and contractile protein content. Despite the fact that these phenotypical alterations have been well characterized, the signaling pathways that mediate these adaptations are still under investigation. There have been significant advances in the past few years delineating signal transduction pathways that regulate protein turnover. In the process of evaluating the effect of various atrophy-inducing stimuli on signal transduction pathways in skeletal muscle, it is apparent that differences do exist concerning both transcriptional and translational adaptations. To this end, it is hypothesized that the processes responsible for invoking skeletal muscle atrophy are unique, despite similar upstream signals and downstream phenotypical adaptations. If this is the case, countermeasures to attenuate atrophy may be more effective if they are designed to accommodate molecular alterations specific to the atrophic stimulus. The aim of this review was to characterize the recent work in humans elucidating the molecular basis of skeletal muscle atrophy in response to immobilization, unloading, spinal cord injury, and detraining to highlight the possibility that all skeletal muscle atrophy is not the same. With an increased understanding of the unique signaling pathways that regulate skeletal muscle protein turnover in the face of various atrophy models, it is possible to exploit these pathways to develop countermeasures to prevent or attenuate atrophy. Eugenics, gene therapy, pharmacology, nutritional, and physical countermeasures are discussed concerning their potential to treat or mitigate atrophy.
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Affiliation(s)
- Maria L Urso
- US Army Research Institute of Environmental Medicine, Natick, MA 01760, USA.
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46
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Aversa Z, Alamdari N, Hasselgren PO. Molecules modulating gene transcription during muscle wasting in cancer, sepsis, and other critical illness. Crit Rev Clin Lab Sci 2011; 48:71-86. [DOI: 10.3109/10408363.2011.591365] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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47
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Protein and Amino Acid Supplementation Does Not Alter Proteolytic Gene Expression following Immobilization. J Nutr Metab 2011; 2011:539690. [PMID: 21845220 PMCID: PMC3153915 DOI: 10.1155/2011/539690] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 01/28/2011] [Accepted: 06/13/2011] [Indexed: 01/23/2023] Open
Abstract
Objective. To determine if supplementation of protein and amino acids (PAA) decreases skeletal muscle expression of atrophy-related genes, muscle mass, and strength during immobilization in humans. Methods. Twenty males wore a lower-limb immobilization boot for 28 days and consumed either a PAA supplement (28 g protein) or carbohydrate placebo (28 g maltodextrose), while consuming their normal daily diet. Testing sessions included dietary analysis, lower-leg girth and body composition measurements, strength testing, and gastrocnemius muscle biopsies. Muscle was analyzed for mRNA expression of markers in the ubiquitin and calpain systems, myostatin, TNF-α, and NF-κB. Results. All genes of interest increased over time (P < .05), but there was no difference between groups. Lower-leg girth decreased over time (P = 0.02); however, there were no significant changes in body composition or strength. Conclusion. Short-term lower-limb disuse, despite the absence of significant muscle atrophy, is associated with increases in skeletal muscle gene expression of several proteolysis-related genes. These changes do not appear to be altered by oral PAA supplementation.
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48
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Pellegrino MA, Desaphy JF, Brocca L, Pierno S, Camerino DC, Bottinelli R. Redox homeostasis, oxidative stress and disuse muscle atrophy. J Physiol 2011; 589:2147-60. [PMID: 21320887 DOI: 10.1113/jphysiol.2010.203232] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A pivotal role has been ascribed to oxidative stress in determining the imbalance between protein synthesis and degradation leading to muscle atrophy in many pathological conditions and in disuse. However, a large variability in disuse-induced alteration of redox homeostasis through muscles, models and species emerges from the literature. Whereas the causal role of oxidative stress appears well established in the mechanical ventilation model, findings are less compelling in the hindlimb unloaded mice and very limited in humans. The mere coexistence of muscle atrophy, indirect indexes of increased reactive oxygen species (ROS) production and impairment of antioxidant defence systems, in fact, does not unequivocally support a causal role of oxidative stress in the phenomenon. We hypothesise that in some muscles, models and species only, due to a large redox imbalance, the leading phenomena are activation of proteolysis and massive oxidation of proteins, which would become more susceptible to degradation. In other conditions, due to a lower extent and variable time course of ROS production, different ROS-dependent, but also -independent intracellular pathways might dominate determining the variable extent of atrophy and even dispensable protein oxidation. The ROS production and removal are complex and finely tuned phenomena. They are indeed important intracellular signals and redox balance maintains normal muscle homeostasis and can underlie either positive or negative adaptations to exercise. A precise approach to determine the levels of ROS in living cells in various conditions appears to be of paramount importance to define and support such hypotheses.
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49
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Fujita H, Hirano M, Shimizu K, Nagamori E. Rapid decrease in active tension generated by C2C12 myotubes after termination of artificial exercise. J Muscle Res Cell Motil 2010; 31:279-88. [DOI: 10.1007/s10974-010-9230-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Accepted: 11/16/2010] [Indexed: 11/30/2022]
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50
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Mukai R, Nakao R, Yamamoto H, Nikawa T, Takeda E, Terao J. Quercetin prevents unloading-derived disused muscle atrophy by attenuating the induction of ubiquitin ligases in tail-suspension mice. JOURNAL OF NATURAL PRODUCTS 2010; 73:1708-10. [PMID: 20853873 DOI: 10.1021/np100240y] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The effects of quercetin (1) were investigated on disused muscle atrophy using mice that underwent tail suspension. Periodic injection of 1 into the gastrocnemius muscle suppressed muscle weight loss and ubiquitin ligase expression. Compound 1 reduced the enhancement of lipid peroxidation in the muscle. Injection of N-acetyl-l-cysteine, but not flavone (2), also prevented muscle weight loss and enhancement of lipid peroxidation. These findings demonstrate that 1 can prevent disused muscle atrophy by attenuating the expression of ubiquitin ligases and that such prevention originates from its antioxidant activity.
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Affiliation(s)
- Rie Mukai
- Department of Food Science, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima 770-8503, Japan
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