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Kaur N, Gupta P, Dutt V, Sharma O, Gupta S, Dua A, Injeti E, Mittal A. Cinnamaldehyde attenuates TNF-α induced skeletal muscle loss in C2C12 myotubes via regulation of protein synthesis, proteolysis, oxidative stress and inflammation. Arch Biochem Biophys 2024; 753:109922. [PMID: 38341069 DOI: 10.1016/j.abb.2024.109922] [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: 09/11/2023] [Revised: 01/10/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024]
Abstract
Inflammation is the primary driver of skeletal muscle wasting, with oxidative stress serving as both a major consequence and a contributor to its deleterious effects. In this regard, regulation of both can efficiently prevent atrophy and thus will increase the rate of survival [1]. With this idea, we hypothesize that preincubation of Cinnamaldehyde (CNA), a known compound with anti-oxidative and anti-inflammatory properties, may be able to prevent skeletal muscle loss. To examine the same, C2C12 post-differentiated myotubes were treated with 25 ng/ml Tumor necrosis factor-alpha (TNF-α) in the presence or absence of 50 μM CNA. The data showed that TNF-α mediated myotube thinning and a lower fusion index were prevented by CNA supplementation 4 h before TNF-α treatment. Moreover, a lower level of ROS and thus maintained antioxidant defense system further underlines the antioxidative function of CNA in atrophic conditions. CNA preincubation also inhibited an increase in the level of inflammatory cytokines and thus led to a lower level of inflammation even in the presence of TNF-α. With decreased oxidative stress and inflammation by CNA, it was able to maintain the intracellular level of injury markers (CK, LDH) and SDH activity of mitochondria. In addition, CNA modulates all five proteolytic systems [cathepsin-L, UPS (atrogin-1), calpain, LC3, beclin] simultaneously with an upregulation of Akt/mTOR pathway, in turn, preserves the muscle-specific proteins (MHCf) from degradation by TNF-α. Altogether, our study exhibits attenuation of muscle loss and provides insight into the possible mechanism of action of CNA in curbing TNF-α induced muscle loss, specifically its effect on proteolysis and protein synthesis.
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Affiliation(s)
- Nirmaljeet Kaur
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India
| | - Prachi Gupta
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India
| | - Vikas Dutt
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India
| | - Onkar Sharma
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India
| | - Sanjeev Gupta
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India
| | - Anita Dua
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India
| | - Elisha Injeti
- Department of Pharmaceutical Sciences, Cedarville University, School of Pharmacy, Cedarville, OH, USA
| | - Ashwani Mittal
- Skeletal Muscle Lab, Institute of Integrated & Honors Studies, Kurukshetra University, Kurukshetra, Haryana, India.
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I S Júnior I, Zanetti GO, Vieira TS, Albuquerque FP, Gomes DA, Paula-Gomes S, Valentim RR, Graça FA, Kettlhut IC, Navegantes LCC, Gonçalves DAP, Lira EC. Resveratrol directly suppresses proteolysis possibly via PKA/CREB signaling in denervated rat skeletal muscle. AN ACAD BRAS CIENC 2023; 95:e20220877. [PMID: 38055559 DOI: 10.1590/0001-3765202320220877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 10/07/2022] [Indexed: 12/08/2023] Open
Abstract
Although there are reports that polyphenol resveratrol (Rsv) may cause muscle hypertrophy in basal conditions and attenuate muscle wasting in catabolic situations, its mechanism of action is still unclear. Our study evaluated the ex vivo effects of Rsv on protein metabolism and intracellular signaling in innervated (sham-operated; Sham) and 3-day sciatic denervated (Den) rat skeletal muscles. Rsv (10-4 M) reduced total proteolysis (40%) in sham muscles. Den increased total proteolysis (~40%) in muscle, which was accompanied by an increase in the activities of ubiquitin-proteasome (~3-fold) and lysosomal (100%) proteolytic systems. Rsv reduced total proteolysis (59%) in Den muscles by inhibiting the hyperactivation of ubiquitin-proteasome (50%) and lysosomal (~70%) systems. Neither Rsv nor Den altered calcium-dependent proteolysis in muscles. Mechanistically, Rsv stimulated PKA/CREB signaling in Den muscles, and PKA blockage by H89 (50μM) abolished the antiproteolytic action of the polyphenol. Rsv reduced FoxO4 phosphorylation (~60%) in both Sham and Den muscles and Akt phosphorylation (36%) in Den muscles. Rsv also caused a homeostatic effect in Den muscles by returning their protein synthesis rates to levels similar to Sham muscles. These data indicate that Rsv directly inhibits the proteolytic activity of lysosomal and ubiquitin-proteasome systems, mainly in Den muscles through, at least in part, the activation of PKA/CREB signaling.
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Affiliation(s)
- Ivanildo I S Júnior
- Universidade Federal de Pernambuco, Centro de Biociências, Departamento de Fisiologia e Farmacologia, Laboratório de Neuroendocrinologia e Metabolismo, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901 Recife, PE, Brazil
| | - Gustavo O Zanetti
- Universidade Federal de Minas Gerais, Escola de Educação Física, Fisioterapia e Terapia Ocupacional, Setor de Fisiologia Esportiva do Centro de Treinamento Esportivo e Laboratório de Fisiologia do Exercício, Av. Presidente Antônio Carlos, 6627, Campus Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Tales S Vieira
- Universidade Federal de Minas Gerais, Escola de Educação Física, Fisioterapia e Terapia Ocupacional, Setor de Fisiologia Esportiva do Centro de Treinamento Esportivo e Laboratório de Fisiologia do Exercício, Av. Presidente Antônio Carlos, 6627, Campus Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Flávia P Albuquerque
- Universidade Federal de Pernambuco, Centro de Biociências, Departamento de Fisiologia e Farmacologia, Laboratório de Neuroendocrinologia e Metabolismo, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901 Recife, PE, Brazil
| | - Dayane A Gomes
- Universidade Federal de Pernambuco, Centro de Biociências, Departamento de Fisiologia e Farmacologia, Laboratório de Neuroendocrinologia e Metabolismo, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901 Recife, PE, Brazil
| | - Silva Paula-Gomes
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Bioquímica & Imunologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Rafael R Valentim
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Bioquímica & Imunologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Flavia A Graça
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento Fisiologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Isis C Kettlhut
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Bioquímica & Imunologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Luiz C C Navegantes
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento Fisiologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Dawit A P Gonçalves
- Universidade Federal de Minas Gerais, Escola de Educação Física, Fisioterapia e Terapia Ocupacional, Setor de Fisiologia Esportiva do Centro de Treinamento Esportivo e Laboratório de Fisiologia do Exercício, Av. Presidente Antônio Carlos, 6627, Campus Pampulha, 31270-901 Belo Horizonte, MG, Brazil
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Bioquímica & Imunologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento Fisiologia, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Eduardo C Lira
- Universidade Federal de Pernambuco, Centro de Biociências, Departamento de Fisiologia e Farmacologia, Laboratório de Neuroendocrinologia e Metabolismo, Av. Prof. Moraes Rego, 1235, Cidade Universitária, 50670-901 Recife, PE, Brazil
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Kumar L, Bisen M, Khan A, Kumar P, Patel SKS. Role of Matrix Metalloproteinases in Musculoskeletal Diseases. Biomedicines 2022; 10:biomedicines10102477. [PMID: 36289739 PMCID: PMC9598837 DOI: 10.3390/biomedicines10102477] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/27/2022] [Accepted: 09/30/2022] [Indexed: 11/16/2022] Open
Abstract
Musculoskeletal disorders include rheumatoid arthritis, osteoarthritis, sarcopenia, injury, stiffness, and bone loss. The prevalence of these conditions is frequent among elderly populations with significant mobility and mortality rates. This may lead to extreme discomfort and detrimental effect on the patient’s health and socioeconomic situation. Muscles, ligaments, tendons, and soft tissue are vital for body function and movement. Matrix metalloproteinases (MMPs) are regulatory proteases involved in synthesizing, degrading, and remodeling extracellular matrix (ECM) components. By modulating ECM reconstruction, cellular migration, and differentiation, MMPs preserve myofiber integrity and homeostasis. In this review, the role of MMPs in skeletal muscle function, muscle injury and repair, skeletal muscle inflammation, and muscular dystrophy and future approaches for MMP-based therapies in musculoskeletal disorders are discussed at the cellular and molecule level.
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Affiliation(s)
- Lokender Kumar
- School of Biotechnology, Faculty of Applied Sciences and Biotechnology, Shoolini University, Solan 173229, India
- Correspondence: (L.K.); (S.K.S.P.); Tel.: +91-017-9235-0000 (L.K.)
| | - Monish Bisen
- School of Biotechnology, Faculty of Applied Sciences and Biotechnology, Shoolini University, Solan 173229, India
| | - Azhar Khan
- School of Biotechnology, Faculty of Applied Sciences and Biotechnology, Shoolini University, Solan 173229, India
| | - Pradeep Kumar
- School of Biotechnology, Faculty of Applied Sciences and Biotechnology, Shoolini University, Solan 173229, India
| | - Sanjay Kumar Singh Patel
- Department of Chemical Engineering, Konkuk University, Seoul 05029, Korea
- Correspondence: (L.K.); (S.K.S.P.); Tel.: +91-017-9235-0000 (L.K.)
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Yoshihara T, Takaragawa M, Dobashi S, Naito H. Losartan treatment attenuates hindlimb unloading-induced atrophy in the soleus muscle of female rats via canonical TGF-β signaling. J Physiol Sci 2022; 72:6. [PMID: 35264097 PMCID: PMC10717208 DOI: 10.1186/s12576-022-00830-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 02/23/2022] [Indexed: 12/23/2022]
Abstract
We investigated the protective effect of losartan, an angiotensin II type 1 receptor blocker, on soleus muscle atrophy. Age-matched male and female Wistar rats were subjected to hindlimb unloading, and the soleus muscle was removed on days 1 and 7 for analysis. Females showed greater reductions in relative weight and myofiber cross-sectional area of the soleus muscle than males on day 7 post-hindlimb unloading. Losartan partially protected females against muscle atrophy. Activation of the canonical TGF-β signaling pathway, assessed via Smad2/3 phosphorylation, was lower in females following losartan treatment and associated with lower levels of protein ubiquitination after 1 (myofibril) and 7 (cytosol) days of unloading. However, no effect was observed in non-canonical TGF-β signaling (p44/p42 and p38 MAPK phosphorylation) in males or females during unloading. Our results suggest that losartan provides partial protection against hindlimb unloading-induced soleus muscle atrophy in female rats, possibly associated with decreased canonical TGF-β signaling.
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Affiliation(s)
- Toshinori Yoshihara
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan.
| | - Mizuki Takaragawa
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
- Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
| | - Shohei Dobashi
- Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
- Institute of Health and Sports Science & Medicine, Juntendo University, Chiba, Japan
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Mañas-García L, Denhard C, Mateu J, Duran X, Gea J, Barreiro E. Beneficial Effects of Resveratrol in Mouse Gastrocnemius: A Hint to Muscle Phenotype and Proteolysis. Cells 2021; 10:cells10092436. [PMID: 34572085 PMCID: PMC8469306 DOI: 10.3390/cells10092436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/08/2021] [Accepted: 09/13/2021] [Indexed: 12/16/2022] Open
Abstract
We hypothesized that the phenolic compound resveratrol mitigates muscle protein degradation and loss and improves muscle fiber cross-sectional area (CSA) in gastrocnemius of mice exposed to unloading (7dI). In gastrocnemius of mice (female C57BL/6J, 10 weeks) exposed to a seven-day period of hindlimb immobilization with/without resveratrol treatment, markers of muscle proteolysis (tyrosine release, systemic troponin-I), atrophy signaling pathways, and muscle phenotypic features and function were analyzed. In gastrocnemius of unloaded mice treated with resveratrol, body and muscle weight and function were attenuated, whereas muscle proteolysis (tyrosine release), proteolytic and apoptotic markers, atrophy signaling pathways, and myofiber CSA significantly improved. Resveratrol treatment of mice exposed to a seven-day period of unloading prevented body and muscle weight and limb strength loss, while an improvement in muscle proteolysis, proteolytic markers, atrophy signaling pathways, apoptosis, and muscle fiber CSA was observed in the gastrocnemius muscle. These findings may have potential therapeutic implications in the management of disuse muscle atrophy in clinical settings.
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Affiliation(s)
- Laura Mañas-García
- Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, Pulmonology Department, IMIM—Hospital del Mar, Parc de Salut Mar, 08003 Barcelona, Spain; (L.M.-G.); (C.D.); (J.G.)
- Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), 08003 Barcelona, Spain
| | - Charlotte Denhard
- Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, Pulmonology Department, IMIM—Hospital del Mar, Parc de Salut Mar, 08003 Barcelona, Spain; (L.M.-G.); (C.D.); (J.G.)
- Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), 08003 Barcelona, Spain
| | - Javier Mateu
- Department of Pharmacy, Hospital del Mar, Parc de Salut Mar, 08003 Barcelona, Spain;
| | - Xavier Duran
- Scientific and Technical Department, Hospital del Mar-IMIM, 08003 Barcelona, Spain;
| | - Joaquim Gea
- Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, Pulmonology Department, IMIM—Hospital del Mar, Parc de Salut Mar, 08003 Barcelona, Spain; (L.M.-G.); (C.D.); (J.G.)
- Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), 08003 Barcelona, Spain
| | - Esther Barreiro
- Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, Pulmonology Department, IMIM—Hospital del Mar, Parc de Salut Mar, 08003 Barcelona, Spain; (L.M.-G.); (C.D.); (J.G.)
- Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), 08003 Barcelona, Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), 08003 Barcelona, Spain
- Correspondence: ; Tel.: +34-93-316-0385; Fax: +34-93-316-0410
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Peris-Moreno D, Malige M, Claustre A, Armani A, Coudy-Gandilhon C, Deval C, Béchet D, Fafournoux P, Sandri M, Combaret L, Taillandier D, Polge C. UBE2L3, a Partner of MuRF1/TRIM63, Is Involved in the Degradation of Myofibrillar Actin and Myosin. Cells 2021; 10:cells10081974. [PMID: 34440743 PMCID: PMC8392593 DOI: 10.3390/cells10081974] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 07/21/2021] [Accepted: 07/28/2021] [Indexed: 12/12/2022] Open
Abstract
The ubiquitin proteasome system (UPS) is the main player of skeletal muscle wasting, a common characteristic of many diseases (cancer, etc.) that negatively impacts treatment and life prognosis. Within the UPS, the E3 ligase MuRF1/TRIM63 targets for degradation several myofibrillar proteins, including the main contractile proteins alpha-actin and myosin heavy chain (MHC). We previously identified five E2 ubiquitin-conjugating enzymes interacting with MuRF1, including UBE2L3/UbcH7, that exhibited a high affinity for MuRF1 (KD = 50 nM). Here, we report a main effect of UBE2L3 on alpha-actin and MHC degradation in catabolic C2C12 myotubes. Consistently UBE2L3 knockdown in Tibialis anterior induced hypertrophy in dexamethasone (Dex)-treated mice, whereas overexpression worsened the muscle atrophy of Dex-treated mice. Using combined interactomic approaches, we also characterized the interactions between MuRF1 and its substrates alpha-actin and MHC and found that MuRF1 preferentially binds to filamentous F-actin (KD = 46.7 nM) over monomeric G-actin (KD = 450 nM). By contrast with actin that did not alter MuRF1–UBE2L3 affinity, binding of MHC to MuRF1 (KD = 8 nM) impeded UBE2L3 binding, suggesting that differential interactions prevail with MuRF1 depending on both the substrate and the E2. Our data suggest that UBE2L3 regulates contractile proteins levels and skeletal muscle atrophy.
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Affiliation(s)
- Dulce Peris-Moreno
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Mélodie Malige
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Agnès Claustre
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Andrea Armani
- Department of Biomedical Sciences, Venetian Institute of Molecular Medicine, University of Padua, 35100 Padova, Italy; (A.A.); (M.S.)
| | - Cécile Coudy-Gandilhon
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Christiane Deval
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Daniel Béchet
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Pierre Fafournoux
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Marco Sandri
- Department of Biomedical Sciences, Venetian Institute of Molecular Medicine, University of Padua, 35100 Padova, Italy; (A.A.); (M.S.)
| | - Lydie Combaret
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Daniel Taillandier
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
| | - Cécile Polge
- Université Clermont Auvergne, INRAE, UNH Unité de Nutrition Humaine, F-63000 Clermont-Ferrand, France; (D.P.-M.); (M.M.); (A.C.); (C.C.-G.); (C.D.); (D.B.); (P.F.); (L.C.); (D.T.)
- Correspondence:
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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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Redox modulation of muscle mass and function. Redox Biol 2020; 35:101531. [PMID: 32371010 PMCID: PMC7284907 DOI: 10.1016/j.redox.2020.101531] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/28/2020] [Accepted: 03/31/2020] [Indexed: 12/21/2022] Open
Abstract
Muscle mass and strength are very important for exercise performance. Training-induced musculoskeletal injuries usually require periods of complete immobilization to prevent any muscle contraction of the affected muscle groups. Disuse muscle wasting will likely affect every sport practitioner in his or her lifetime. Even short periods of disuse results in significant declines in muscle size, fiber cross sectional area, and strength. To understand the molecular signaling pathways involved in disuse muscle atrophy is of the utmost importance to develop more effective countermeasures in sport science research. We have divided our review in four different sections. In the first one we discuss the molecular mechanisms involved in muscle atrophy including the main protein synthesis and protein breakdown signaling pathways. In the second section of the review we deal with the main cellular, animal, and human atrophy models. The sources of reactive oxygen species in disuse muscle atrophy and the mechanism through which they regulate protein synthesis and proteolysis are reviewed in the third section of this review. The last section is devoted to the potential interventions to prevent muscle disuse atrophy with especial consideration to studies on which the levels of endogenous antioxidants enzymes or dietary antioxidants have been tested.
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Graham ZA, Goldberger A, Azulai D, Conover CF, Ye F, Bauman WA, Cardozo CP, Yarrow JF. Contusion spinal cord injury upregulates p53 protein expression in rat soleus muscle at multiple timepoints but not key senescence cytokines. Physiol Rep 2020; 8:e14357. [PMID: 32026570 PMCID: PMC7002538 DOI: 10.14814/phy2.14357] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/12/2019] [Accepted: 12/27/2019] [Indexed: 01/04/2023] Open
Abstract
To determine whether muscle disuse after a spinal cord injury (SCI) produces elevated markers of cellular senescence and induces markers of the senescence-associated secretory phenotypes (SASPs) in paralyzed skeletal muscle. Four-month-old male Sprague-Dawley rats received a moderate-severe (250 kiloDyne) T-9 contusion SCI or Sham surgery and were monitored over 2 weeks, and 1-, 2-, or 3 months. Animals were sacrificed via isoflurane overdose and terminal exsanguination and the soleus was carefully excised and snap frozen. Protein expression of senescence markers p53, p27, and p16 was determined from whole soleus lysates using Western immunoblotting and RT-qPCR was used to determine the soleus gene expression of IL-1α, IL-1β, IL-6, CXCL1, and TNFα. SCI soleus muscle displayed 2- to 3-fold higher total p53 protein expression at 2 weeks, and at 1 and 2 months when compared with Sham. p27 expression was stable across all groups and timepoints. p16 protein expression was lower at 3 months in SCI versus Sham, but not earlier timepoints. Gene expression was relatively stable between groups at 2 weeks. There were Surgery x Time interaction effects for IL-6 and TNFα mRNA expression but not for IL-1α, IL-1β, or CXCL1. There were no main effects for time or surgery for IL-1α, IL-1β, or CXCL1, but targeted t tests showed reductions in IL-1α and CXCL1 in SCI animals compared to Sham at 3 months and IL-1β was reduced in SCI animals compared to Sham animals at the 2-month timepoint. The elevation in p53 does not appear consistent with the induction of SASP because mRNA expression of cytokines associated with senescence was not uniformly upregulated and, in some instances, was downregulated in the early chronic phase of SCI.
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Affiliation(s)
- Zachary A. Graham
- Research ServiceBirmingham VA Medical CenterBirminghamALUSA
- Department of Cell, Developmental and Integrative BiologyUniversity of Alabama‐BirminghamBirminghamALUSA
| | - Abigail Goldberger
- Center for the Medical Consequences of Spinal Cord InjuryJames J. Peters VA Medical CenterBronxNYUSA
| | - Daniella Azulai
- Center for the Medical Consequences of Spinal Cord InjuryJames J. Peters VA Medical CenterBronxNYUSA
| | - Christine F. Conover
- Research Service and Brain Rehabilitation Research CenterMalcolm Randall VA Medical CenterNorth Florida/South Georgia Veterans Health SystemGainesvilleFLUSA
| | - Fan Ye
- Research Service and Brain Rehabilitation Research CenterMalcolm Randall VA Medical CenterNorth Florida/South Georgia Veterans Health SystemGainesvilleFLUSA
| | - William A. Bauman
- Center for the Medical Consequences of Spinal Cord InjuryJames J. Peters VA Medical CenterBronxNYUSA
- Icahn School of Medicine at Mount SinaiNew YorkNYUSA
| | - Christopher P. Cardozo
- Center for the Medical Consequences of Spinal Cord InjuryJames J. Peters VA Medical CenterBronxNYUSA
- Icahn School of Medicine at Mount SinaiNew YorkNYUSA
| | - Joshua F. Yarrow
- Research Service and Brain Rehabilitation Research CenterMalcolm Randall VA Medical CenterNorth Florida/South Georgia Veterans Health SystemGainesvilleFLUSA
- Division of Endocrinology, Diabetes, and MetabolismUniversity of Florida College of MedicineGainesvilleFLUSA
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10
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Muscle Phenotype, Proteolysis, and Atrophy Signaling During Reloading in Mice: Effects of Curcumin on the Gastrocnemius. Nutrients 2020; 12:nu12020388. [PMID: 32024036 PMCID: PMC7071295 DOI: 10.3390/nu12020388] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/24/2019] [Accepted: 01/24/2020] [Indexed: 12/31/2022] Open
Abstract
We hypothesized that curcumin may mitigate muscle protein degradation and loss through attenuation of proteolytic activity in limb muscles of mice exposed to reloading (7dR) following immobilization (7dI). In gastrocnemius of mice (female C57BL/6J, 10 weeks) exposed to recovery following a seven-day period of hindlimb immobilization with/without curcumin treatment, markers of muscle proteolysis (systemic troponin-I), atrophy signaling pathways and histone deacetylases, protein synthesis, and muscle phenotypic characteristics and function were analyzed. In gastrocnemius of reloading mice compared to unloaded, muscle function, structure, sirtuin-1, and protein synthesis improved, while proteolytic and signaling markers (FoxO1/3) declined. In gastrocnemius of unloaded and reloaded mice treated with curcumin, proteolytic and signaling markers (NF-kB p50) decreased and sirtuin-1 activity and hybrid fibers size increased (reloaded muscle), while no significant improvement was seen in muscle function. Treatment with curcumin elicited a rise in sirtuin-1 activity, while attenuating proteolysis in gastrocnemius of mice during reloading following a period of unloading. Curcumin attenuated muscle proteolysis probably via activation of histone deacetylase sirtuin-1, which also led to decreased levels of atrophy signaling pathways. These findings offer an avenue of research in the design of therapeutic strategies in clinical settings of patients exposed to periods of disuse muscle atrophy.
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11
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Nikolaou S, Cramer AA, Hu L, Goh Q, Millay DP, Cornwall R. Proteasome inhibition preserves longitudinal growth of denervated muscle and prevents neonatal neuromuscular contractures. JCI Insight 2019; 4:128454. [PMID: 31661460 DOI: 10.1172/jci.insight.128454] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 10/16/2019] [Indexed: 12/14/2022] Open
Abstract
Muscle contractures are a prominent and disabling feature of many neuromuscular disorders, including the 2 most common forms of childhood neurologic dysfunction: neonatal brachial plexus injury (NBPI) and cerebral palsy. There are currently no treatment strategies to directly alter the contracture pathology, as the pathogenesis of these contractures is unknown. We previously showed in a mouse model of NBPI that contractures result from impaired longitudinal muscle growth. Current presumed explanations for growth impairment in contractures focus on the dysregulation of muscle stem cells, which differentiate and fuse to existing myofibers during growth, as this process has classically been thought to control muscle growth during the neonatal period. Here, we demonstrate in a mouse model of NBPI that denervation does not prevent myonuclear accretion and that reduction in myonuclear number has no effect on functional muscle length or contracture development, providing definitive evidence that altered myonuclear accretion is not a driver of neuromuscular contractures. In contrast, we observed elevated levels of protein degradation in NBPI muscle, and we demonstrate that contractures can be pharmacologically prevented with the proteasome inhibitor bortezomib. These studies provide what we believe is the first strategy to prevent neuromuscular contractures by correcting the underlying deficit in longitudinal muscle growth.
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Affiliation(s)
| | - Alyssa Aw Cramer
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | | | | | - Douglas P Millay
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Roger Cornwall
- Division of Orthopaedic Surgery, and.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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12
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Ryu Y, Lee D, Jung SH, Lee KJ, Jin H, Kim SJ, Lee HM, Kim B, Won KJ. Sabinene Prevents Skeletal Muscle Atrophy by Inhibiting the MAPK-MuRF-1 Pathway in Rats. Int J Mol Sci 2019; 20:ijms20194955. [PMID: 31597276 PMCID: PMC6801606 DOI: 10.3390/ijms20194955] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 09/28/2019] [Accepted: 10/03/2019] [Indexed: 12/21/2022] Open
Abstract
Chrysanthemum boreale Makino essential oil (CBMEO) has diverse biological activities including a skin regenerating effect. However, its role in muscle atrophy remains unknown. This study explored the effects of CBMEO and its active ingredients on skeletal muscle atrophy using in vitro and in vivo models of muscle atrophy. CBMEO reversed the size decrease of L6 myoblasts under starvation. Among the eight monoterpene compounds of CBMEO without cytotoxicity for L6 cells, sabinene induced predominant recovery of reductions of myotube diameters under starvation. Sabinene diminished the elevated E3 ubiquitin ligase muscle ring-finger protein-1 (MuRF-1) expression and p38 mitogen-activated protein kinase (MAPK) and extracellular signal-regulated kinase1/2 (ERK1/2) phosphorylations in starved myotubes. Moreover, sabinene decreased the increased level of reactive oxygen species (ROS) in myotubes under starvation. The ROS inhibitor antagonized expression of MuRF-1 and phosphorylation of MAPKs, which were elevated in starved myotubes. In addition, levels of muscle fiber atrophy and MuRF-1 expression in gastrocnemius from fasted rats were reduced after administration of sabinene. These findings demonstrate that sabinene, a bioactive component from CBMEO, may attenuate skeletal muscle atrophy by regulating the activation mechanism of ROS-mediated MAPK/MuRF-1 pathways in starved myotubes, probably leading to the reverse of reduced muscle fiber size in fasted rats.
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Affiliation(s)
- Yunkyoung Ryu
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Donghyen Lee
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Seung Hyo Jung
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Kyung-Jin Lee
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Hengzhe Jin
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Su Jung Kim
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Hwan Myung Lee
- Department of Cosmetic Science, College of Life and Health Sciences, Hoseo University, 20 Hoseo-ro79beon-gil, Hoseo-ro, Baebang-eup, Asan 31499, Korea.
| | - Bokyung Kim
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
| | - Kyung-Jong Won
- Department of Physiology, School of Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea.
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13
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Skeletal Muscle-Specific Methyltransferase METTL21C Trimethylates p97 and Regulates Autophagy-Associated Protein Breakdown. Cell Rep 2019; 23:1342-1356. [PMID: 29719249 DOI: 10.1016/j.celrep.2018.03.136] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 03/02/2018] [Accepted: 03/29/2018] [Indexed: 01/04/2023] Open
Abstract
Protein aggregates and cytoplasmic vacuolization are major hallmarks of multisystem proteinopathies (MSPs) that lead to muscle weakness. Here, we identify METTL21C as a skeletal muscle-specific lysine methyltransferase. Insertion of a β-galactosidase cassette into the Mettl21c mouse locus revealed that METTL21C is specifically expressed in MYH7-positive skeletal muscle fibers. Ablation of the Mettl21c gene reduced endurance capacity and led to age-dependent accumulation of autophagic vacuoles in skeletal muscle. Denervation-induced muscle atrophy highlighted further impairments of autophagy-related proteins, including LC3, p62, and cathepsins, in Mettl21c-/- muscles. In addition, we demonstrate that METTL21C interacts with the ATPase p97 (VCP), which is mutated in various human MSP conditions. We reveal that METTL21C trimethylates p97 on the Lys315 residue and found that loss of this modification reduced p97 hexamer formation and ATPase activity in vivo. We conclude that the methyltransferase METTL21C is an important modulator of protein degradation in skeletal muscle under both normal and enhanced protein breakdown conditions.
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14
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Ehmsen JT, Kawaguchi R, Mi R, Coppola G, Höke A. Longitudinal RNA-Seq analysis of acute and chronic neurogenic skeletal muscle atrophy. Sci Data 2019; 6:179. [PMID: 31551418 PMCID: PMC6760191 DOI: 10.1038/s41597-019-0185-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 08/08/2019] [Indexed: 12/14/2022] Open
Abstract
Skeletal muscle is a highly adaptable tissue capable of changes in size, contractility, and metabolism according to functional demands. Atrophy is a decline in mass and strength caused by pathologic loss of myofibrillar proteins, and can result from disuse, aging, or denervation caused by injury or peripheral nerve disorders. We provide a high-quality longitudinal RNA-Seq dataset of skeletal muscle from a cohort of adult C57BL/6J male mice subjected to tibial nerve denervation for 0 (baseline), 1, 3, 7, 14, 30, or 90 days. Using an unbiased genomics approach to identify gene expression changes across the entire longitudinal course of muscle atrophy affords the opportunity to (1) establish acute responses to denervation, (2) detect pathways that mediate rapid loss of muscle mass within the first week after denervation, and (3) capture the molecular phenotype of chronically atrophied muscle at a stage when it is largely resistant to recovery.
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Affiliation(s)
- Jeffrey T Ehmsen
- Department of Neurology, Neuromuscular Division, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Riki Kawaguchi
- Department of Neurology, University of California, Los Angeles, Los Angeles, CA, 90095, USA.,Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ruifa Mi
- Department of Neurology, Neuromuscular Division, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Giovanni Coppola
- Department of Neurology, University of California, Los Angeles, Los Angeles, CA, 90095, USA.,Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, 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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Dumitru A, Radu BM, Radu M, Cretoiu SM. Muscle Changes During Atrophy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1088:73-92. [PMID: 30390248 DOI: 10.1007/978-981-13-1435-3_4] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Muscle atrophy typically is a direct effect of protein degradation induced by a diversity of pathophysiologic states such as disuse, immobilization, denervation, aging, sepsis, cachexia, glucocorticoid treatment, hereditary muscular disorders, cancer, diabetes and obesity, kidney and heart failure, and others. Muscle atrophy is defined by changes in the muscles, consisting in shrinkage of myofibers, changes in the types of fiber and myosin isoforms, and a net loss of cytoplasm, organelles and overall a protein loss. Although in the literature there are extensive studies in a range of animal models, the paucity of human data is a reality. This chapter is focused on various aspects of muscle wasting and describes the transitions of myofiber types during the progression of muscle atrophy in several pathological states. Clinical conditions associated with muscle atrophy have been grouped based on the fast-to-slow or slow-to-fast fiber-type shifts. We have also summarized the ultrastructural and histochemical features characteristic for muscle atrophy in clinical and experimental models for aging, cancer, diabetes and obesity, and heart failure and arrhythmia.
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Affiliation(s)
- Adrian Dumitru
- Department of Pathology, Emergency University Hospital, Bucharest, Romania
| | - Beatrice Mihaela Radu
- Faculty of Biology, Department of Anatomy, Animal Physiology and Biophysics, University of Bucharest, Bucharest, Romania.,Life, Environmental and Earth Sciences Division, Research Institute of the University of Bucharest (ICUB), Bucharest, Romania
| | - Mihai Radu
- Department of Life & Environmental Physics, 'Horia Hulubei' National Institute for Physics & Nuclear Engineering, Magurele, Romania
| | - Sanda Maria Cretoiu
- Division of Cell and Molecular Biology and Histology, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.
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16
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mTORC1 and PKB/Akt control the muscle response to denervation by regulating autophagy and HDAC4. Nat Commun 2019; 10:3187. [PMID: 31320633 PMCID: PMC6639401 DOI: 10.1038/s41467-019-11227-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 07/02/2019] [Indexed: 12/13/2022] Open
Abstract
Loss of innervation of skeletal muscle is a determinant event in several muscle diseases. Although several effectors have been identified, the pathways controlling the integrated muscle response to denervation remain largely unknown. Here, we demonstrate that PKB/Akt and mTORC1 play important roles in regulating muscle homeostasis and maintaining neuromuscular endplates after nerve injury. To allow dynamic changes in autophagy, mTORC1 activation must be tightly balanced following denervation. Acutely activating or inhibiting mTORC1 impairs autophagy regulation and alters homeostasis in denervated muscle. Importantly, PKB/Akt inhibition, conferred by sustained mTORC1 activation, abrogates denervation-induced synaptic remodeling and causes neuromuscular endplate degeneration. We establish that PKB/Akt activation promotes the nuclear import of HDAC4 and is thereby required for epigenetic changes and synaptic gene up-regulation upon denervation. Hence, our study unveils yet-unknown functions of PKB/Akt-mTORC1 signaling in the muscle response to nerve injury, with important implications for neuromuscular integrity in various pathological conditions. Denervation leads to muscle atrophy and neuromuscular endplate remodeling. Here, the authors show that a balanced activation of mTORC1 contributes to the dynamic regulation of autophagic flux in denervated muscle and that activation of PKB/Akt promotes the nuclear import of HDAC4, which is essential for endplate maintenance upon nerve injury
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17
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Zheng R, Huang S, Zhu J, Lin W, Xu H, Zheng X. Leucine attenuates muscle atrophy and autophagosome formation by activating PI3K/AKT/mTOR signaling pathway in rotator cuff tears. Cell Tissue Res 2019; 378:113-125. [PMID: 31020406 DOI: 10.1007/s00441-019-03021-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 03/25/2019] [Indexed: 12/22/2022]
Abstract
Rotator cuff tears (RCTs), the most common tendon injury, are always accompanied by muscle atrophy, which is characterized by excessive protein degradation. Autophagy-lysosome systems are the crucial proteolytic pathways and are activated in atrophying muscle. Thus, inhibition of the autophagy-lysosome pathway might be an alternative way to minimize skeletal muscle atrophy. In this present study, combined with a tendon transection-induced rat model of massive rotator cuff tears, HE staining and transmission electron microscopy methods, we found leucine supplementation effectively prevented muscle atrophy, muscle injury and autophagosome formation. Utilizing immunoblotting, we discovered that leucine supplementation is able to inhibit the rise in autophagy-related protein expression (including LC3, Atrogin-1, MuRF1, Bnip3 and FoxO3) driven by tendon transection. The PI3K/AKT/mTOR pathway that was essential in autophagosome formation and autophagy was blocked in atrophying muscle and reactivated in the presence of leucine. Once administrated with LY294002 (PI3K inhibitor) and Rapamycin (mTOR inhibitor), leucine mediated by the anti-atrophic effects was nearly blunted. These results suggest that leucine potentially attenuates tendon transection-induced muscle atrophy through autophagy inhibition via activating the PI3K/AKT/mTOR pathway.
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Affiliation(s)
- Rongzong Zheng
- Department of Orthopaedic Surgery, Zhejiang University Lishui Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Central Hospital, Lishui, Zhejiang, People's Republic of China
| | - Shuming Huang
- Department of Orthopaedic Surgery, Zhejiang University Lishui Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Central Hospital, Lishui, Zhejiang, People's Republic of China.
| | - Junkun Zhu
- Department of Orthopaedic Rehabilitation, Zhejiang University Lishui Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Central Hospital, Lishui, Zhejiang, People's Republic of China
| | - Wei Lin
- Department of Orthopaedic Surgery, Zhejiang University Lishui Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Central Hospital, Lishui, Zhejiang, People's Republic of China
| | - Huan Xu
- Department of Orthopaedic Surgery, Zhejiang University Lishui Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Central Hospital, Lishui, Zhejiang, People's Republic of China
| | - Xiang Zheng
- Department of Orthopaedic Surgery, Zhejiang University Lishui Hospital, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui Central Hospital, Lishui, Zhejiang, People's Republic of China
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18
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Yoshihara T, Tsuzuki T, Chang SW, Kakigi R, Sugiura T, Naito H. Exercise preconditioning attenuates hind limb unloading-induced gastrocnemius muscle atrophy possibly via the HDAC4/Gadd45 axis in old rats. Exp Gerontol 2019; 122:34-41. [PMID: 31009659 DOI: 10.1016/j.exger.2019.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 04/01/2019] [Accepted: 04/18/2019] [Indexed: 11/25/2022]
Abstract
The mechanisms involved in unloading-induced skeletal muscle loss may be age-specific, and the evidence for exercise preconditioning-induced protection against disuse muscle atrophy in aged rats is limited. Therefore, in this study, we investigated age-related differences in the activation of the HDAC4/Gadd45α pathway following hindlimb unloading (HU). We also assessed the protective effect of preconditioning exercise on this pathway in young and old rat gastrocnemius muscle. Three-month-old (young, n = 18) and 24-month-old (old, n = 18) male Wistar rats were assigned to the following groups: control group (n = 6), seven days of HU group (n = 6), and a bout of exercise preconditioning prior to HU (Ex+HU) group (n = 6). Rats of both ages in the Ex + HU group ran continuously on a motor-driven treadmill (0° slope, 20 m/min, 15 min) prior to HU. The gastrocnemius muscles were removed after 7 days of HU and analyzed for protein content and mRNA expression. Gastrocnemius muscle weight was significantly higher in the Ex+HU group than in the HU group of old rats, but not in young rats. Levels of HDAC4 protein and mRNA were significantly increased in the old HU group. However, the increase was significantly suppressed in the old Ex+HU group. Moreover, the protective effect of exercise preconditioning had a positive effect on Gadd45α mRNA and protein levels only in the old Ex+HU group. No exercise preconditioning-related protection was observed in the young rats. Our data indicated that a single bout of preconditioning exercise prior to HU may exert a protective effect in disuse muscle atrophy in old rats and that these effects may be partially mediated by the HDAC4/Gadd45α axis.
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Affiliation(s)
- Toshinori Yoshihara
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba 270-1695, Japan.
| | - Takamasa Tsuzuki
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Shuo-Wen Chang
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba 270-1695, Japan.
| | - Ryo Kakigi
- Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
| | - Takao Sugiura
- Faculty of Education, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8513, Japan.
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba 270-1695, Japan.
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19
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Qi L, Xu L, Wang WT, Zhang YD, Zhang R, Zou YF, Shi HB. Dynamic contrast-enhanced magnetic resonance imaging in denervated skeletal muscle: Experimental study in rabbits. PLoS One 2019; 14:e0215069. [PMID: 30951550 PMCID: PMC6450635 DOI: 10.1371/journal.pone.0215069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 03/26/2019] [Indexed: 12/22/2022] Open
Abstract
Purpose To investigate the value of dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) for evaluating denervated skeletal muscle in rabbits. Materials and methods 24 male rabbits were randomly divided into an irreversible neurotmesis group and a control group. In the experimental group, the sciatic nerves of rabbits were transected for irreversible neurotmesis model. A sham operation was performed in the control group. MRI of rabbit lower legs was performed before nerve surgery and 1 day, 3 days, 5 days, 1 week, 2 weeks, 3 weeks, 4 weeks, 6 weeks, 8 weeks, 10 weeks, and 12 weeks after surgery. Results Signal intensity changes were seen in the left gastrocnemius muscle on the T2-weighted images. DCE-MRI derived parameters (Ktrans, Kep, and Vp) were measured in vivo. In the irreversible neurotmesis group, T2-weighted images showed increased signal intensity in the left gastrocnemius muscle. Ktrans, Vp values changes occur as early as 1 day after denervation, and increased gradually until 4 weeks after surgery. There are significant increases in both Ktrans and Vp values compared with those in the control group after surgery (P < 0.05). Kep values show no significant difference between the irreversible neurotmesis group and the control group. Conclusion DCE-MRI hold the promise of an early and sensitive diagnosis of denervated skeletal muscle.
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Affiliation(s)
- Liang Qi
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Lei Xu
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Wen-Tao Wang
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Yu-Dong Zhang
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Rui Zhang
- Department of Neurosurgery, Nanjing Children’s Hospital, Nanjing, PR China
| | - Yue-Fen Zou
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Hai-Bin Shi
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
- * E-mail:
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20
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Yoshihara T, Natsume T, Tsuzuki T, Chang SW, Kakigi R, Sugiura T, Naito H. Sex differences in forkhead box O3a signaling response to hindlimb unloading in rat soleus muscle. J Physiol Sci 2019; 69:235-244. [PMID: 30259391 PMCID: PMC10716962 DOI: 10.1007/s12576-018-0640-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 09/16/2018] [Indexed: 12/28/2022]
Abstract
We tested the hypothesis that there are sex differences in hindlimb unloading-induced activation of the forkhead box subfamily O3a (FoxO3a) signaling pathway in rat soleus muscle. Age-matched male and female Wistar rats were subjected to hindlimb unloading, and the soleus muscle was removed before or 1 or 7 days after unloading. Female rats showed greater percent changes in relative soleus muscle weight than males. FoxO3a phosphorylation was lower in females than in males and was associated with higher levels of protein ubiquitination 7 days after unloading. Heat shock protein 72 (Hsp72) levels were lower in female rats and increased in males during unloading. Female rats showed slightly higher myostatin levels, which showed a non-significant decline in male rats following unloading. Thus, males and females show different responses to the FoxO3a/ubiquitin-proteasome pathway following hindlimb unloading in rat soleus muscle, which may be associated with differences in Hsp72 expression and myostatin signaling.
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Affiliation(s)
- Toshinori Yoshihara
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan.
| | - Toshiharu Natsume
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan
| | - Takamasa Tsuzuki
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi, 468-8503, Japan
| | - Shuo-Wen Chang
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan
| | - Ryo Kakigi
- Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Takao Sugiura
- Faculty of Education, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8513, Japan
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan
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21
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Skeletal muscle excitation-metabolism coupling. Arch Biochem Biophys 2019; 664:89-94. [DOI: 10.1016/j.abb.2019.01.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 01/17/2023]
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22
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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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23
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Cardozo CP. Muscle biology after spinal cord injury: Recent advances and future challenges. Acta Physiol (Oxf) 2018; 223:e13073. [PMID: 29637698 DOI: 10.1111/apha.13073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C P Cardozo
- Center for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center, Bronx, NY, USA.,Icahn School of Medicine at Mount Sinai, New York, NY, USA
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24
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Lundell LS, Savikj M, Kostovski E, Iversen PO, Zierath JR, Krook A, Chibalin AV, Widegren U. Protein translation, proteolysis and autophagy in human skeletal muscle atrophy after spinal cord injury. Acta Physiol (Oxf) 2018; 223:e13051. [PMID: 29423932 DOI: 10.1111/apha.13051] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/17/2018] [Accepted: 01/21/2018] [Indexed: 12/14/2022]
Abstract
AIM Spinal cord injury-induced loss of skeletal muscle mass does not progress linearly. In humans, peak muscle loss occurs during the first 6 weeks postinjury, and gradually continues thereafter. The aim of this study was to delineate the regulatory events underlying skeletal muscle atrophy during the first year following spinal cord injury. METHODS Key translational, autophagic and proteolytic proteins were analysed by immunoblotting of human vastus lateralis muscle obtained 1, 3 and 12 months following spinal cord injury. Age-matched able-bodied control subjects were also studied. RESULTS Several downstream targets of Akt signalling decreased after spinal cord injury in skeletal muscle, without changes in resting Akt Ser473 and Akt Thr308 phosphorylation or total Akt protein. Abundance of mTOR protein and mTOR Ser2448 phosphorylation, as well as FOXO1 Ser256 phosphorylation and FOXO3 protein, decreased in response to spinal cord injury, coincident with attenuated protein abundance of E3 ubiquitin ligases, MuRF1 and MAFbx. S6 protein and Ser235/236 phosphorylation, as well as 4E-BP1 Thr37/46 phosphorylation, increased transiently after spinal cord injury, indicating higher levels of protein translation early after injury. Protein abundance of LC3-I and LC3-II decreased 3 months postinjury as compared with 1 month postinjury, but not compared to able-bodied control subjects, indicating lower levels of autophagy. Proteins regulating proteasomal degradation were stably increased in response to spinal cord injury. CONCLUSION Together, these data provide indirect evidence suggesting that protein translation and autophagy transiently increase, while whole proteolysis remains stably higher in skeletal muscle within the first year after spinal cord injury.
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Affiliation(s)
- L. S. Lundell
- Department of Physiology and Pharmacology; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
| | - M. Savikj
- Department of Physiology and Pharmacology; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
- Faculty of Medicine; University of Oslo; Oslo Norway
- Department of Research; Sunnaas Rehabilitation Hospital; Nesoddtangen Norway
| | - E. Kostovski
- Faculty of Medicine; University of Oslo; Oslo Norway
- Department of Research; Sunnaas Rehabilitation Hospital; Nesoddtangen Norway
| | - P. O. Iversen
- Department of Nutrition; Institute of Basic Medical Sciences; University of Oslo; Oslo Norway
- Department of Hematology; Oslo University Hospital; Oslo Norway
| | - J. R. Zierath
- Department of Physiology and Pharmacology; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
- Department of Molecular Medicine and Surgery; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
| | - A. Krook
- Department of Physiology and Pharmacology; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
| | - A. V. Chibalin
- Department of Molecular Medicine and Surgery; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
| | - U. Widegren
- Department of Molecular Medicine and Surgery; Section for Integrative Physiology; Karolinska Institutet; Stockholm Sweden
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25
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Nicolas N, Kobaiter-Maarrawi S, Georges S, Abadjian G, Maarrawi J. Motor Cortex Stimulation Regenerative Effects in Peripheral Nerve Injury: An Experimental Rat Model. World Neurosurg 2018; 114:e800-e808. [PMID: 29572175 DOI: 10.1016/j.wneu.2018.03.090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 03/11/2018] [Accepted: 03/12/2018] [Indexed: 11/20/2022]
Abstract
BACKGROUND Immediate microsurgical nerve suture remains the gold standard after peripheral nerve injuries. However, functional recovery is delayed, and it is satisfactory in only 2/3 of cases. Peripheral electrical nerve stimulation proximal to the lesion enhances nerve regeneration and muscle reinnervation. This study aims to evaluate the effects of the motor cortex electrical stimulation on peripheral nerve regeneration after injury. METHODS Eighty rats underwent right sciatic nerve section, followed by immediate microsurgical epineural sutures. Rats were divided into 4 groups: Group 1 (control, n = 20): no electrical stimulation; group 2 (n = 20): immediate stimulation of the sciatic nerve just proximal to the lesion; Group 3 (n = 20): motor cortex stimulation (MCS) for 15 minutes after nerve section and suture (MCSa); group 4 (n = 20): MCS performed over the course of two weeks after nerve suture (MCSc). Assessment included electrophysiology and motor functional score at day 0 (baseline value before nerve section), and at weeks 4, 8, and 12. Rats were euthanized for histological study at week 12. RESULTS Our results showed that MCS enhances functional recovery, nerve regeneration, and muscle reinnervation starting week 4 compared with the control group (P < 0.05). The MCS induces higher reinnervation rates even compared with peripheral stimulation, with better results in the MCSa group (P < 0.05), especially in terms of functional recovery. CONCLUSIONS MCS seems to have a beneficial effect after peripheral nerve injury and repair in terms of nerve regeneration and muscle reinnervation, especially when acute mode is used.
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Affiliation(s)
- Nicolas Nicolas
- Laboratory of Research in Neurosciences (Mechanisms and Application of Neuromodulation), Faculty of Medicine, St. Joseph University, Beirut, Lebanon; Department of Orthopedic Surgery, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Sandra Kobaiter-Maarrawi
- Laboratory of Research in Neurosciences (Mechanisms and Application of Neuromodulation), Faculty of Medicine, St. Joseph University, Beirut, Lebanon
| | - Samuel Georges
- Laboratory of Research in Neurosciences (Mechanisms and Application of Neuromodulation), Faculty of Medicine, St. Joseph University, Beirut, Lebanon; Department of Orthopedic Surgery, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Gerard Abadjian
- Department of Pathology, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Joseph Maarrawi
- Laboratory of Research in Neurosciences (Mechanisms and Application of Neuromodulation), Faculty of Medicine, St. Joseph University, Beirut, Lebanon; Department of Neurosurgery, Hôtel-Dieu de France Hospital, Beirut, Lebanon.
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26
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Nielsen KB, Lal NN, Sheard PW. Age-related remodelling of the myotendinous junction in the mouse soleus muscle. Exp Gerontol 2018; 104:52-59. [PMID: 29421351 DOI: 10.1016/j.exger.2018.01.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/18/2017] [Accepted: 01/18/2018] [Indexed: 11/19/2022]
Abstract
The age-related loss of muscle mass and function predominantly affect muscles of the lower limbs and have largely been associated with decline in muscle fibre size and number, although the exact mechanisms underlying these losses are poorly understood. In addition, consistent reports that the loss of muscle strength exceeds that which can be explained by declines in muscle mass has widened the search for causes of sarcopenia to include supporting tissues such as the extracellular matrix and tendons. Although the changes to both muscle and tendon with age are well characterised, little work has focused on the interface between these two tissues, the myotendinous junction (MTJ). Given the crucial role for this structure in force transfer between muscle and tendon, we asked whether the myotendinous junction underwent structural changes with age in lower limb muscle. We used whole muscle to assess gross muscle and tendon morphology, and immunohistochemistry to determine fibre and MTJ profile number in young (6 months), middle aged (18 months) and elderly (24 months) C57BL/6 female mice. MTJ length was quantified using serial cross sections of the soleus muscle. We found an apparent 3.5-fold increase in MTJ profiles per cross section with no increase in fibre number in old mice, and found this to be a result of a doubling in length of the MTJ region with age. This coincided with an increase in proximal tendon length (31%), as well as an increase in collagen deposition between 6 and 24-months of age consistent with an expansion of the fibre termination area. These findings uncover a previously undescribed effect of ageing on the MTJ and open up new lines of investigation into the role of this structure in the age-related loss of muscle function.
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Affiliation(s)
| | - Navneet N Lal
- Department of Physiology, University of Otago, New Zealand
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27
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Friedrich O, Diermeier S, Larsson L. Weak by the machines: muscle motor protein dysfunction - a side effect of intensive care unit treatment. Acta Physiol (Oxf) 2018; 222. [PMID: 28387014 DOI: 10.1111/apha.12885] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/12/2017] [Accepted: 04/04/2017] [Indexed: 12/25/2022]
Abstract
Intensive care interventions involve periods of mechanical ventilation, sedation and complete mechanical silencing of patients. Critical illness myopathy (CIM) is an ICU-acquired myopathy that is associated with limb muscle weakness, muscle atrophy, electrical silencing of muscle and motor proteinopathy. The hallmark of CIM is a preferential muscle myosin loss due to increased catabolic and reduced anabolic activity. The ubiquitin proteasome pathway plays an important role, apart from recently identified novel mechanisms affecting non-lysosomal protein degradation or autophagy. CIM is not reproduced by pure disuse atrophy, denervation atrophy, steroid-induced atrophy or septic myopathy, although combinations of high-dose steroids and denervation can mimic CIM. New animal models of critical illness and ICU treatment (i.e. mechanical ventilation and complete immobilization) provide novel insights regarding the time course of protein synthesis and degradation alterations, and the role of protective chaperone activities in the process of myosin loss. Altered mechano-signalling seems involved in triggering a major part of myosin loss in experimental CIM models, and passive loading of muscle potently ameliorates the CIM phenotype. We provide a systematic overview of similarities and distinct differences in the signalling pathways involved in triggering muscle atrophy in CIM and isolated trigger factors. As preferential myosin loss is mostly determined from biochemistry analyses providing no spatial resolution of myosin loss processes within myofibres, we also provide first results monitoring myosin signal intensities during experimental ICU intervention using multi-photon Second Harmonic Generation microscopy. Our results confirm that myosin loss is an evenly distributed process within myofibres rather than being confined to hot spots.
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Affiliation(s)
- O. Friedrich
- Institute of Medical Biotechnology; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
- Erlangen Graduate School in Advanced Optical Technologie (SAOT); Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - S. Diermeier
- Institute of Medical Biotechnology; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
- Erlangen Graduate School in Advanced Optical Technologie (SAOT); Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - L. Larsson
- Department of Physiology & Pharmacology; Karolinska Institutet; Stockholm Sweden
- Section of Clinical Neurophysiology; Department of Clinical Neuroscience; Karolinska Institutet; Stockholm Sweden
- Department of Biobehavioral Health; The Pennsylvania State University; University Park PA USA
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28
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Karam C, Yi J, Xiao Y, Dhakal K, Zhang L, Li X, Manno C, Xu J, Li K, Cheng H, Ma J, Zhou J. Absence of physiological Ca 2+ transients is an initial trigger for mitochondrial dysfunction in skeletal muscle following denervation. Skelet Muscle 2017; 7:6. [PMID: 28395670 PMCID: PMC5387329 DOI: 10.1186/s13395-017-0123-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 03/08/2017] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Motor neurons control muscle contraction by initiating action potentials in muscle. Denervation of muscle from motor neurons leads to muscle atrophy, which is linked to mitochondrial dysfunction. It is known that denervation promotes mitochondrial reactive oxygen species (ROS) production in muscle, whereas the initial cause of mitochondrial ROS production in denervated muscle remains elusive. Since denervation isolates muscle from motor neurons and deprives it from any electric stimulation, no action potentials are initiated, and therefore, no physiological Ca2+ transients are generated inside denervated muscle fibers. We tested whether loss of physiological Ca2+ transients is an initial cause leading to mitochondrial dysfunction in denervated skeletal muscle. METHODS A transgenic mouse model expressing a mitochondrial targeted biosensor (mt-cpYFP) allowed a real-time measurement of the ROS-related mitochondrial metabolic function following denervation, termed "mitoflash." Using live cell imaging, electrophysiological, pharmacological, and biochemical studies, we examined a potential molecular mechanism that initiates ROS-related mitochondrial dysfunction following denervation. RESULTS We found that muscle fibers showed a fourfold increase in mitoflash activity 24 h after denervation. The denervation-induced mitoflash activity was likely associated with an increased activity of mitochondrial permeability transition pore (mPTP), as the mitoflash activity was attenuated by application of cyclosporine A. Electrical stimulation rapidly reduced mitoflash activity in both sham and denervated muscle fibers. We further demonstrated that the Ca2+ level inside mitochondria follows the time course of the cytosolic Ca2+ transient and that inhibition of mitochondrial Ca2+ uptake by Ru360 blocks the effect of electric stimulation on mitoflash activity. CONCLUSIONS The loss of cytosolic Ca2+ transients due to denervation results in the downstream absence of mitochondrial Ca2+ uptake. Our studies suggest that this could be an initial trigger for enhanced mPTP-related mitochondrial ROS generation in skeletal muscle.
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Affiliation(s)
- Chehade Karam
- Rush University School of Medicine, Chicago, IL, USA
| | - Jianxun Yi
- Rush University School of Medicine, Chicago, IL, USA.,Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Yajuan Xiao
- Rush University School of Medicine, Chicago, IL, USA.,Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Kamal Dhakal
- Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Lin Zhang
- Rush University School of Medicine, Chicago, IL, USA.,Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Xuejun Li
- Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Carlo Manno
- Rush University School of Medicine, Chicago, IL, USA
| | - Jiejia Xu
- Institute of Molecular Medicine, Peking University, Beijing, China
| | - Kaitao Li
- Institute of Molecular Medicine, Peking University, Beijing, China
| | - Heping Cheng
- Institute of Molecular Medicine, Peking University, Beijing, China
| | - Jianjie Ma
- Wexner Medical Center, The Ohio State University, 460 West 12th Avenue, Columbus, OH, USA.
| | - Jingsong Zhou
- Rush University School of Medicine, Chicago, IL, USA. .,Kansas City University of Medicine and Bioscience, 1750 Independence Ave, Kansas City, MO, 64106, USA.
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29
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Zhu X, van Hees HWH, Heunks L, Wang F, Shao L, Huang J, Shi L, Ma S. The role of calpains in ventilator-induced diaphragm atrophy. Intensive Care Med Exp 2017; 5:14. [PMID: 28290154 PMCID: PMC5348482 DOI: 10.1186/s40635-017-0127-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 02/24/2017] [Indexed: 11/24/2022] Open
Abstract
Background Controlled mechanical ventilation (CMV) is associated with diaphragm dysfunction. Dysfunction results from muscle atrophy and injury of diaphragm muscle fibers. Enhanced proteolysis and reduced protein synthesis play an important role in the development of atrophy. The current study is to evaluate the effects of the calpains inhibitor calpeptin on the development of diaphragm atrophy and activation of key enzymes of the ubiquitin-proteasome pathway in rats under CMV. Methods Three groups of rats were studied: control animals (CON, n = 8), rats subjected to 24 h of MV (CMV, n = 8), and rats subjected to 24 h of MV after administration of the calpain inhibitor calpeptin (CMVC, n = 8). The diaphragm was analyzed for calpain activity, myosin heavy chain (MHC) content, and cross-sectional area (CSA) of diaphragmatic muscle fibers as a marker for muscle atrophy. In addition, key enzymes of the ubiquitin-proteasome pathway (MAFbx and MuRF1) were also studied. Results CMV resulted in loss of both MHCfast and MHCslow. Furthermore, the CSA of diaphragmatic muscle fibers was significantly decreased after 24 h of CMV. However, calpain inhibitor calpeptin prevented loss of MHC and CSA after CMV. In addition, calpeptin prevented the increase in protein expression of calpain1 and calpain2 and reduced calpain activity as indicated by reduced generation of the calpain cleavage product αII-spectrin in the diaphragm. CMV-induced upregulation of both MAFbx and MuRF1 protein levels was attenuated by treatment with calpeptin. Conclusions The calpain inhibitor calpeptin prevents MV-induced muscle atrophy. In addition, calpeptin attenuated the expression of key proteolytic enzymes known to be involved in ventilator-induced diaphragm atrophy, including MAFbx and MuRF1.
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Affiliation(s)
- Xiaoping Zhu
- Department of Pulmonary Diseases, Shanghai East Hospital, Tongji University, Shanghai, 200120, China
| | - Hieronymus W H van Hees
- Department of Pulmonary Diseases, Radboud University Medical Centre, Postbox 9101, Nijmegen, 6500 HB, the Netherlands
| | - Leo Heunks
- Intensive Care Medicine, Radboud University Medical Centre, Postbox 9101, Nijmegen, 6500 HB, the Netherlands
| | - Feifei Wang
- NingXia Medical University, Yinchuan, 750004, China
| | - Lei Shao
- Department of Pulmonary Diseases, Shanghai East Hospital, Tongji University, Shanghai, 200120, China
| | - Jiaru Huang
- NingXia Medical University, Yinchuan, 750004, China
| | - Lei Shi
- NingXia Medical University, Yinchuan, 750004, China
| | - Shaolin Ma
- Department of Intensive Care Unit, Shanghai East Hospital, Tongji University, Shanghai, 200120, China.
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30
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Leon AS. Attenuation of Adverse Effects of Aging on Skeletal Muscle by Regular Exercise and Nutritional Support. Am J Lifestyle Med 2017; 11:4-16. [PMID: 30202306 PMCID: PMC6124840 DOI: 10.1177/1559827615589319] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/06/2015] [Indexed: 12/19/2022] Open
Abstract
Beginning early in midlife, natural/primary aging is inevitably associated with a progressive reduction in muscle mass and function. This process can progress with aging to a substantial loss of strength, particularly in the lower extremities, reducing mobility. This condition, commonly referred to as sarcopenia, can result in frailty, reducing one's ability to live independently. This article reviews the underlying biological process contributing to the development of sarcopenia and the roles of regular exercise and nutritional support for attenuating aging-associated muscle loss as well as risk and management of sarcopenia and associated frailty.
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31
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Yoshihara T, Yamamoto Y, Shibaguchi T, Miyaji N, Kakigi R, Naito H, Goto K, Ohmori D, Yoshioka T, Sugiura T. Dietary astaxanthin supplementation attenuates disuse-induced muscle atrophy and myonuclear apoptosis in the rat soleus muscle. J Physiol Sci 2017; 67:181-190. [PMID: 27117878 PMCID: PMC10717173 DOI: 10.1007/s12576-016-0453-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 04/15/2016] [Indexed: 12/01/2022]
Abstract
Extended periods of skeletal muscle disuse results in muscle atrophy and weakness. Currently, no therapeutic treatment is available for the prevention of this problem. Nonetheless, growing evidence suggests that prevention of disuse-induced oxidative stress in inactive muscle fibers can delay inactivity-induced muscle wasting. Therefore, this study tested the hypothesis that dietary supplementation with the antioxidant astaxanthin would protect against disuse muscle atrophy, in part, by prevention of myonuclear apoptosis. Wistar rats (8 weeks old) were divided into control (CT, n = 9), hindlimb unloading (HU, n = 9), and hindlimb unloading with astaxanthin (HU + AX, n = 9) groups. Following 2 weeks of dietary supplementation, rats in the HU and HU + AX groups were exposed to unloading for 7 days. Seven-day unloading resulted in reduced soleus muscle weight and myofiber cross-sectional area (CSA) by ~30 and ~47 %, respectively. Nonetheless, relative muscle weights and CSA of the soleus muscle in the HU + AX group were significantly greater than those of the HU group. Moreover, astaxanthin prevented disuse-induced increase in the number of terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-positive nuclei. We conclude that astaxanthin supplementation prior to and during hindlimb unloading attenuates soleus muscle atrophy, in part, by suppressing myonuclear apoptosis.
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Affiliation(s)
- Toshinori Yoshihara
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan.
| | - Yuki Yamamoto
- Sports Research and Development Core, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Tsubasa Shibaguchi
- Graduate School of Frontier Biosciences, Osaka University, 1-17 Machikaneyama-cho, Toyonaka, Osaka, Japan
| | - Nobuyuki Miyaji
- Toyo Koso Kagaku Co. Ltd., 4-4-27 Horie, Urayasu, Chiba, Japan
| | - Ryo Kakigi
- Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University, 1-1 Hirakagakuendai, Inzai, Chiba, 270-1695, Japan
| | - Katsumasa Goto
- Graduate School of Health Sciences, Toyohashi SOZO University, 20-1 Matsushita, Toyohashi, Aichi, Japan
| | - Daijiro Ohmori
- Department of Chemistry, School of Medicine, Juntendo University, 1-1 Hrakagakuendai, Inzai, Chiba, Japan
| | | | - Takao Sugiura
- Faculty of Education, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Japan
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32
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Chacon-Cabrera A, Lund-Palau H, Gea J, Barreiro E. Time-Course of Muscle Mass Loss, Damage, and Proteolysis in Gastrocnemius following Unloading and Reloading: Implications in Chronic Diseases. PLoS One 2016; 11:e0164951. [PMID: 27792730 PMCID: PMC5085049 DOI: 10.1371/journal.pone.0164951] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 10/04/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Disuse muscle atrophy is a major comorbidity in patients with chronic diseases including cancer. We sought to explore the kinetics of molecular mechanisms shown to be involved in muscle mass loss throughout time in a mouse model of disuse muscle atrophy and recovery following immobilization. METHODS Body and muscle weights, grip strength, muscle phenotype (fiber type composition and morphometry and muscle structural alterations), proteolysis, contractile proteins, systemic troponin I, and mitochondrial content were assessed in gastrocnemius of mice exposed to periods (1, 2, 3, 7, 15 and 30 days) of non-invasive hindlimb immobilization (plastic splint, I cohorts) and in those exposed to reloading for different time-points (1, 3, 7, 15, and 30 days, R cohorts) following a seven-day period of immobilization. Groups of control animals were also used. RESULTS Compared to non-exposed controls, muscle weight, limb strength, slow- and fast-twitch cross-sectional areas, mtDNA/nDNA, and myosin content were decreased in mice of I cohorts, whereas tyrosine release, ubiquitin-proteasome activity, muscle injury and systemic troponin I levels were increased. Gastrocnemius reloading following splint removal improved muscle mass loss, strength, fiber atrophy, injury, myosin content, and mtDNA/nDNA, while reducing ubiquitin-proteasome activity and proteolysis. CONCLUSIONS A consistent program of molecular and cellular events leading to reduced gastrocnemius muscle mass and mitochondrial content and reduced strength, enhanced proteolysis, and injury, was seen in this non-invasive mouse model of disuse muscle atrophy. Unloading of the muscle following removal of the splint significantly improved the alterations seen during unloading, characterized by a specific kinetic profile of molecular events involved in muscle regeneration. These findings have implications in patients with chronic diseases including cancer in whom physical activity may be severely compromised.
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Affiliation(s)
- Alba Chacon-Cabrera
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), C/ Dr. Aiguader, 88, Barcelona, E-08003 Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
| | - Helena Lund-Palau
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), C/ Dr. Aiguader, 88, Barcelona, E-08003 Spain
| | - Joaquim Gea
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), C/ Dr. Aiguader, 88, Barcelona, E-08003 Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
| | - Esther Barreiro
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS), Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB), C/ Dr. Aiguader, 88, Barcelona, E-08003 Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain
- * E-mail:
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Chacon-Cabrera A, Gea J, Barreiro E. Short- and Long-Term Hindlimb Immobilization and Reloading: Profile of Epigenetic Events in Gastrocnemius. J Cell Physiol 2016; 232:1415-1427. [DOI: 10.1002/jcp.25635] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 10/05/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Alba Chacon-Cabrera
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Joaquim Gea
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Esther Barreiro
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
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Cisterna BA, Vargas AA, Puebla C, Sáez JC. Connexin hemichannels explain the ionic imbalance and lead to atrophy in denervated skeletal muscles. Biochim Biophys Acta Mol Basis Dis 2016; 1862:2168-2176. [PMID: 27580092 DOI: 10.1016/j.bbadis.2016.08.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/09/2016] [Accepted: 08/26/2016] [Indexed: 10/21/2022]
Abstract
Denervated fast skeletal muscles undergo atrophy, which is associated with an increase in sarcolemma permeability and protein imbalance. However, the mechanisms responsible for these alterations remain largely unknown. Recently, a close association between de novo expression of hemichannels formed by connexins 43 and 45 and increase in sarcolemma permeability of denervated fast skeletal myofibers was demonstrated. However, it remains unknown whether these connexins cause the ionic imbalance of denervates fast myofibers. To elucidate the latter and the role of hemichannels formed by connexins (Cx HCs) in denervation-induced atrophy, skeletal myofibers deficient in Cx43 and Cx45 expression (Cx43fl/flCx45fl/fl:Myo-Cre mice) and control (Cx43fl/flCx45fl/fl mice) were denervated and several muscle features were systematically analyzed at different post-denervation (PD) times (1, 3, 5, 7 and 14days). The following sequence of events was found in denervated myofibers of Cx43fl/flCx45fl/fl mice: 1) from day 3 PD, increase in sarcolemmal permeability, 2) from day 5 PD, increases of intracellular Ca2+ and Na+ signals as well as a significant increase in protein synthesis and degradation, yielding a negative protein balance and 3) from day 7 PD, a fall in myofibers cross-section area. All the above alterations were either absent or drastically reduced in denervated myofibers of Cx43fl/flCx45fl/fl:Myo-Cre mice. Thus, the denervation-induced Cx HCs expression is an early event that precedes the electrochemical gradient dysregulation across the sarcolemma and critically contributes to the progression of skeletal muscle atrophy. Consequently, Cx HCs could be a therapeutic target to drastically prevent the denervation-induced atrophy of fast skeletal muscles.
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Affiliation(s)
- Bruno A Cisterna
- Departamento de Fisiología, Pontifícia Universidad Católica de Chile, Santiago, Chile; Centro Interdisciplinario de Neurociencias de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile.
| | - Aníbal A Vargas
- Departamento de Fisiología, Pontifícia Universidad Católica de Chile, Santiago, Chile
| | - Carlos Puebla
- Departamento de Fisiología, Pontifícia Universidad Católica de Chile, Santiago, Chile; Centro de Fisiología Celular e Integrativa, Facultad de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago, Chile
| | - Juan C Sáez
- Departamento de Fisiología, Pontifícia Universidad Católica de Chile, Santiago, Chile; Centro Interdisciplinario de Neurociencias de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile.
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Foresto CS, Paula-Gomes S, Silveira WA, Graça FA, Kettelhut IDC, Gonçalves DAP, Mattiello-Sverzut AC. Morphological and molecular aspects of immobilization-induced muscle atrophy in rats at different stages of postnatal development: the role of autophagy. J Appl Physiol (1985) 2016; 121:646-60. [PMID: 27445301 DOI: 10.1152/japplphysiol.00687.2015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 07/19/2016] [Indexed: 01/07/2023] Open
Abstract
Muscle loss occurs following injury and immobilization in adulthood and childhood, which impairs the rehabilitation process; however, far fewer studies have been conducted analyzing atrophic response in infants. This work investigated first the morphological and molecular mechanisms involved in immobilization-induced atrophy in soleus muscles from rats at different stages of postnatal development [i.e., weanling (WR) and adult (AR) rats] and, second, the role of autophagy in regulating muscle plasticity during immobilization. Hindlimb immobilization for 10 days reduced muscle mass and fiber cross-sectional area, with more pronounced atrophy in WR, and induced slow-to-fast fiber switching. These effects were accompanied by a decrease in markers of protein synthesis and an increase in autophagy. The ubiquitin (Ub)-ligase MuRF1 and the ubiquitinated proteins were upregulated by immobilization in AR while the autolyzed form of μ-calpain was increased in WR. To further explore the role of autophagy in muscle abnormalities, AR were concomitantly immobilized and treated with colchicine, which blocks autophagosome-lysosome fusion. Colchicine-treated immobilized muscles had exacerbated atrophy and presented degenerative features. Despite Igf1/Akt signaling was downregulated in immobilized muscles from both age groups, Foxo1 and 4 phosphorylation was increased in WR. In the same group of animals, Foxo1 acetylation and Foxo1 and 4 content was increased and decreased, respectively. Our data show that muscle disorders induced by 10-day-immobilization occur in both age-dependent and -independent manners, an understanding that may optimize treatment outcomes in infants. We also provide further evidence that the strong inhibition of autophagy may be ineffective for treating muscle atrophy.
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Affiliation(s)
- Camila Silva Foresto
- Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Sílvia Paula-Gomes
- Department of Biochemistry/Immunology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Wilian Assis Silveira
- Department of Physiology Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil; and
| | - Flávia Aparecida Graça
- Department of Physiology Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil; and
| | - Isis do Carmo Kettelhut
- Department of Physiology Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil; and Department of Biochemistry/Immunology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Dawit Albieiro Pinheiro Gonçalves
- Department of Physiology Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil; and Department of Biochemistry/Immunology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Ana Claudia Mattiello-Sverzut
- Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
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Tuffaha SH, Singh P, Budihardjo JD, Means KR, Higgins JP, Shores JT, Salvatori R, Höke A, Lee WPA, Brandacher G. Therapeutic augmentation of the growth hormone axis to improve outcomes following peripheral nerve injury. Expert Opin Ther Targets 2016; 20:1259-65. [PMID: 27192539 DOI: 10.1080/14728222.2016.1188079] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Peripheral nerve injuries often result in debilitating motor and sensory deficits. There are currently no therapeutic agents that are clinically available to enhance the regenerative process. Following surgical repair, axons often must regenerate long distances to reach and reinnervate distal targets. Progressive atrophy of denervated muscle and Schwann cells (SCs) prior to reinnervation contributes to poor outcomes. Growth hormone (GH)-based therapies have the potential to accelerate axonal regeneration while at the same time limiting atrophy of muscle and the distal regenerative pathway prior to reinnervation. AREAS COVERED In this review, we discuss the potential mechanisms by which GH-based therapies act on the multiple tissue types involved in peripheral nerve regeneration to ultimately enhance outcomes, and review the pertinent mechanistic and translational studies that have been performed. We also address potential secondary benefits of GH-based therapies pertaining to improved bone, tendon and wound healing in the setting of peripheral nerve injury. EXPERT OPINION GH-based therapies carry great promise for the treatment of peripheral nerve injuries, given the multi-modal mechanism of action not seen with other experimental therapies. A number of FDA-approved drugs that augment the GH axis are currently available, which may facilitate clinical translation.
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Affiliation(s)
- Sami H Tuffaha
- a Department of Plastic and Reconstructive Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Prateush Singh
- a Department of Plastic and Reconstructive Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Joshua D Budihardjo
- a Department of Plastic and Reconstructive Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | | | | | - Jaimie T Shores
- a Department of Plastic and Reconstructive Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Roberto Salvatori
- c Department of Medicine , Division of Endocrinology, Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Ahmet Höke
- d Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - W P Andrew Lee
- a Department of Plastic and Reconstructive Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Gerald Brandacher
- a Department of Plastic and Reconstructive Surgery , Johns Hopkins University School of Medicine , Baltimore , MD , USA
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Wei ZJ, Zhou XH, Fan BY, Lin W, Ren YM, Feng SQ. Proteomic and bioinformatic analyses of spinal cord injury‑induced skeletal muscle atrophy in rats. Mol Med Rep 2016; 14:165-74. [PMID: 27177391 PMCID: PMC4918545 DOI: 10.3892/mmr.2016.5272] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 05/03/2016] [Indexed: 11/06/2022] Open
Abstract
Spinal cord injury (SCI) may result in skeletal muscle atrophy. Identifying diagnostic biomarkers and effective targets for treatment is an important challenge in clinical work. The aim of the present study is to elucidate potential biomarkers and therapeutic targets for SCI‑induced muscle atrophy (SIMA) using proteomic and bioinformatic analyses. The protein samples from rat soleus muscle were collected at different time points following SCI injury and separated by two‑dimensional gel electrophoresis and compared with the sham group. The identities of these protein spots were analyzed by mass spectrometry (MS). MS demonstrated that 20 proteins associated with muscle atrophy were differentially expressed. Bioinformatic analyses indicated that SIMA changed the expression of proteins associated with cellular, developmental, immune system and metabolic processes, biological adhesion and localization. The results of the present study may be beneficial in understanding the molecular mechanisms of SIMA and elucidating potential biomarkers and targets for the treatment of muscle atrophy.
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Affiliation(s)
- Zhi-Jian Wei
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Xian-Hu Zhou
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Bao-You Fan
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Wei Lin
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Yi-Ming Ren
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Shi-Qing Feng
- Department of Orthopaedics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
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Guo Y, Meng J, Tang Y, Wang T, Wei B, Feng R, Gong B, Wang H, Ji G, Lu Z. AMP-activated kinase α2 deficiency protects mice from denervation-induced skeletal muscle atrophy. Arch Biochem Biophys 2016; 600:56-60. [PMID: 27136709 DOI: 10.1016/j.abb.2016.04.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 04/23/2016] [Accepted: 04/28/2016] [Indexed: 10/21/2022]
Abstract
AMP-activated protein kinase (AMPK) is a master regulator of skeletal muscle metabolic pathways. Recently, AMPK activation by AICAR has been shown to increase myofibrillar protein degradation in C2C12 myotubes via stimulating autophagy and ubiquitin proteasome system. However, the impact of AMPKα on denervation induced muscle atrophy has not been tested. In this study, we performed sciatic denervation on hind limb muscles in both wild type (WT) and AMPKα2(-/-) mice. We found that AMPKα was phosphorylated in atrophic muscles following denervation. In addition, deletion of AMPKα2 significantly attenuated denervation induced skeletal muscle wasting and protein degradation, as evidenced by preserved muscle mass and myofiber area, as well as lower levels of ubiquitinated protein, Atrogin-1 and MuRF-1 expression, and LC3-II/I ratio in tibial anterior (TA) muscles. Interestingly, the phosphorylated FoxO3a at Ser253 was significantly decreased in atrophic TA muscles, which was preserved in AMPKα2(-/-) mice. Collectively, our data support the notion that the activation of AMPKα2 contributes to the atrophic effects of denervation.
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Affiliation(s)
- Yuting Guo
- College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China; National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jin Meng
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yinglong Tang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Ting Wang
- College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bin Wei
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Run Feng
- College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bing Gong
- Department of Cardiovascular Surgery, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Huiwen Wang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Guangju Ji
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Zhongbing Lu
- College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China.
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Brioche T, Pagano AF, Py G, Chopard A. Muscle wasting and aging: Experimental models, fatty infiltrations, and prevention. Mol Aspects Med 2016; 50:56-87. [PMID: 27106402 DOI: 10.1016/j.mam.2016.04.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 04/13/2016] [Accepted: 04/13/2016] [Indexed: 12/21/2022]
Abstract
Identification of cost-effective interventions to maintain muscle mass, muscle strength, and physical performance during muscle wasting and aging is an important public health challenge. It requires understanding of the cellular and molecular mechanisms involved. Muscle-deconditioning processes have been deciphered by means of several experimental models, bringing together the opportunities to devise comprehensive analysis of muscle wasting. Studies have increasingly recognized the importance of fatty infiltrations or intermuscular adipose tissue for the age-mediated loss of skeletal-muscle function and emphasized that this new important factor is closely linked to inactivity. The present review aims to address three main points. We first mainly focus on available experimental models involving cell, animal, or human experiments on muscle wasting. We next point out the role of intermuscular adipose tissue in muscle wasting and aging and try to highlight new findings concerning aging and muscle-resident mesenchymal stem cells called fibro/adipogenic progenitors by linking some cellular players implicated in both FAP fate modulation and advancing age. In the last part, we review the main data on the efficiency and molecular and cellular mechanisms by which exercise, replacement hormone therapies, and β-hydroxy-β-methylbutyrate prevent muscle wasting and sarcopenia. Finally, we will discuss a potential therapeutic target of sarcopenia: glucose 6-phosphate dehydrogenase.
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Affiliation(s)
- Thomas Brioche
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France.
| | - Allan F Pagano
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| | - Guillaume Py
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| | - Angèle Chopard
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
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Mukai R, Matsui N, Fujikura Y, Matsumoto N, Hou DX, Kanzaki N, Shibata H, Horikawa M, Iwasa K, Hirasaka K, Nikawa T, Terao J. Preventive effect of dietary quercetin on disuse muscle atrophy by targeting mitochondria in denervated mice. J Nutr Biochem 2016; 31:67-76. [PMID: 27133425 DOI: 10.1016/j.jnutbio.2016.02.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 12/11/2022]
Abstract
Quercetin is a major dietary flavonoid in fruits and vegetables. We aimed to clarify the preventive effect of dietary quercetin on disuse muscle atrophy and the underlying mechanisms. We established a mouse denervation model by cutting the sciatic nerve in the right leg (SNX surgery) to lack of mobilization in hind-limb. Preintake of a quercetin-mixed diet for 14days before SNX surgery prevented loss of muscle mass and atrophy of muscle fibers in the gastrocnemius muscle (GM). Phosphorylation of Akt, a key phosphorylation pathway of suppression of protein degradation, was activated in the quercetin-mixed diet group with and without SNX surgery. Intake of a quercetin-mixed diet suppressed the generation of hydrogen peroxide originating from mitochondria and elevated mitochondrial peroxisome proliferator-activated receptor-γ coactivator 1α mRNA expression as well as NADH dehydrogenase 4 expression in the GM with SNX surgery. Quercetin and its conjugated metabolites reduced hydrogen peroxide production in the mitochondrial fraction obtained from atrophied muscle. In C2C12 myotubes, quercetin reached the mitochondrial fraction. These findings suggest that dietary quercetin can prevent disuse muscle atrophy by targeting mitochondria in skeletal muscle tissue through protecting mitochondria from decreased biogenesis and reducing mitochondrial hydrogen peroxide release, which can be related to decreased hydrogen peroxide production and/or improvements on antioxidant capacity of mitochondria.
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Affiliation(s)
- Rie Mukai
- Department of Food Science, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramotocho, Tokushima, 770-8503, Japan
| | - Naoko Matsui
- Department of Food Science, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramotocho, Tokushima, 770-8503, Japan
| | - Yutaka Fujikura
- Department of Food Science, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramotocho, Tokushima, 770-8503, Japan
| | - Norifumi Matsumoto
- Department of Biochemical Science and Technology Faculty of Agriculture, Kagoshima University, 1-12-24, Korimoto, Kagoshima, 890-0065, Japan
| | - De-Xing Hou
- Department of Biochemical Science and Technology Faculty of Agriculture, Kagoshima University, 1-12-24, Korimoto, Kagoshima, 890-0065, Japan
| | - Noriyuki Kanzaki
- Institute for Health Care Science, Suntory Wellness Ltd, 1-1-1 Wakayamadai, Shimamoto-cho, Mishima-gun, Oksaka, 618-8503, Japan
| | - Hiroshi Shibata
- Institute for Health Care Science, Suntory Wellness Ltd, 1-1-1 Wakayamadai, Shimamoto-cho, Mishima-gun, Oksaka, 618-8503, Japan
| | - Manabu Horikawa
- Bioorganic Research Institute, Suntory Foundation for Life Sciences
| | - Keiko Iwasa
- Research Institute, Suntory Global Innovation Center, 1-1-1 Wakayamadai, Shimamoto-cho, Mishima-gun, Oksaka, 618-8503, Japan
| | - Katsuya Hirasaka
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramotocho, Tokushima, 770-8503, Japan
| | - Junji Terao
- Department of Food Science, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramotocho, Tokushima, 770-8503, Japan.
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Tryon LD, Vainshtein A, Memme J, Crilly MJ, Hood DA. WITHDRAWN: Relationship between the regulation of muscle atrophy and mitochondrial turnover during chronic disuse. Integr Med Res 2016. [DOI: 10.1016/j.imr.2014.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Abstract
Abstract
Muscle weakness is common in the surgical intensive care unit (ICU). Low muscle mass at ICU admission is a significant predictor of adverse outcomes. The consequences of ICU-acquired muscle weakness depend on the underlying mechanism. Temporary drug-induced weakness when properly managed may not affect outcome. Severe perioperative acquired weakness that is associated with adverse outcomes (prolonged mechanical ventilation, increases in ICU length of stay, and mortality) occurs with persistent (time frame: days) activation of protein degradation pathways, decreases in the drive to the skeletal muscle, and impaired muscular homeostasis. ICU-acquired muscle weakness can be prevented by early treatment of the underlying disease, goal-directed therapy, restrictive use of immobilizing medications, optimal nutrition, activating ventilatory modes, early rehabilitation, and preventive drug therapy. In this article, the authors review the nosology, epidemiology, diagnosis, and prevention of ICU-acquired weakness in surgical ICU patients.
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Machado J, Manfredi LH, Silveira WA, Gonçalves DAP, Lustrino D, Zanon NM, Kettelhut IC, Navegantes LC. Calcitonin gene-related peptide inhibits autophagic-lysosomal proteolysis through cAMP/PKA signaling in rat skeletal muscles. Int J Biochem Cell Biol 2015; 72:40-50. [PMID: 26718975 DOI: 10.1016/j.biocel.2015.12.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 12/04/2015] [Accepted: 12/18/2015] [Indexed: 12/29/2022]
Abstract
Calcitonin gene-related peptide (CGRP) is a neuropeptide released by motor neuron in skeletal muscle and modulates the neuromuscular transmission by induction of synthesis and insertion of acetylcholine receptor on postsynaptic muscle membrane; however, its role in skeletal muscle protein metabolism remains unclear. We examined the in vitro and in vivo effects of CGRP on protein breakdown and signaling pathways in control skeletal muscles and muscles following denervation (DEN) in rats. In isolated muscles, CGRP (10(-10) to 10(-6)M) reduced basal and DEN-induced activation of overall proteolysis in a concentration-dependent manner. The in vitro anti-proteolytic effect of CGRP was completely abolished by CGRP8-37, a CGRP receptor antagonist. CGRP down-regulated the lysosomal proteolysis, the mRNA levels of LC3b, Gabarapl1 and cathepsin L and the protein content of LC3-II in control and denervated muscles. In parallel, CGRP elevated cAMP levels, stimulated PKA/CREB signaling and increased Foxo1 phosphorylation in both conditions. In denervated muscles and starved C2C12 cells, Rp-8-Br-cAMPs or PKI, two PKA inhibitors, completely abolished the inhibitory effect of CGRP on Foxo1, 3 and 4 and LC3 lipidation. A single injection of CGRP (100 μg kg(-1)) in denervated rats increased the phosphorylation levels of CREB and Akt, inhibited Foxo transcriptional activity, the LC3 lipidation as well as the mRNA levels of LC3b and cathepsin L, two bona fide targets of Foxo. This study shows for the first time that CGRP exerts a direct inhibitory action on autophagic-lysosomal proteolysis in control and denervated skeletal muscle by recruiting cAMP/PKA signaling, effects that are related to inhibition of Foxo activity and LC3 lipidation.
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Affiliation(s)
- Juliano Machado
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Leandro H Manfredi
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Wilian A Silveira
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Dawit A P Gonçalves
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Danilo Lustrino
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Neusa M Zanon
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Isis C Kettelhut
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Biochemistry/Immunology, Ribeirão Preto Medical School, University of São Paulo, Brazil
| | - Luiz C Navegantes
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Barreiro E, Puig-Vilanova E, Marin-Corral J, Chacón-Cabrera A, Salazar-Degracia A, Mateu X, Puente-Maestu L, García-Arumí E, Andreu AL, Molina L. Therapeutic Approaches in Mitochondrial Dysfunction, Proteolysis, and Structural Alterations of Diaphragm and Gastrocnemius in Rats With Chronic Heart Failure. J Cell Physiol 2015; 231:1495-513. [DOI: 10.1002/jcp.25241] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 11/03/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Esther Barreiro
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Ester Puig-Vilanova
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
| | - Judith Marin-Corral
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
| | - Alba Chacón-Cabrera
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Anna Salazar-Degracia
- Department of Pulmonology-Muscle and Respiratory System Research Unit (URMAR), IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department (CEXS); Universitat Pompeu Fabra (UPF), Barcelona Biomedical Research Park (PRBB); Barcelona Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES); Instituto de Salud Carlos III (ISCIII); Barcelona Spain
| | - Xavier Mateu
- Servicio de Neumología, Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Madrid Spain
| | - Luis Puente-Maestu
- Servicio de Neumología, Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Madrid Spain
| | - Elena García-Arumí
- Unitat de Patologia Neuromuscular i Mitocondrial, Hospital Universitari Vall d'Hebron Institut de Recerca (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER); ISCIII; Barcelona Spain
| | - Antoni L. Andreu
- Unitat de Patologia Neuromuscular i Mitocondrial, Hospital Universitari Vall d'Hebron Institut de Recerca (VHIR); Universitat Autònoma de Barcelona; Barcelona Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER); ISCIII; Barcelona Spain
| | - Luis Molina
- Department of Cardiology, Hospital del Mar, Heart Diseases Biomedical Research Group, IMIM, and Department of Medicine; Universitat Autònoma de Barcelona; Barcelona Spain
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Tang Y, Wang H, Wei B, Guo Y, Gu L, Yang Z, Zhang Q, Wu Y, Yuan Q, Zhao G, Ji G. CUG-BP1 regulates RyR1 ASI alternative splicing in skeletal muscle atrophy. Sci Rep 2015; 5:16083. [PMID: 26531141 PMCID: PMC4632035 DOI: 10.1038/srep16083] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 09/30/2015] [Indexed: 02/06/2023] Open
Abstract
RNA binding protein is identified as an important mediator of aberrant alternative splicing in muscle atrophy. The altered splicing of calcium channels, such as ryanodine receptors (RyRs), plays an important role in impaired excitation-contraction (E-C) coupling in muscle atrophy; however, the regulatory mechanisms of ryanodine receptor 1 (RyR1) alternative splicing leading to skeletal muscle atrophy remains to be investigated. In this study we demonstrated that CUG binding protein 1 (CUG-BP1) was up-regulated and the alternative splicing of RyR1 ASI (exon70) was aberrant during the process of neurogenic muscle atrophy both in human patients and mouse models. The gain and loss of function experiments in vivo demonstrated that altered splicing pattern of RyR1 ASI was directly mediated by an up-regulated CUG-BP1 function. Furthermore, we found that CUG-BP1 affected the calcium release activity in single myofibers and the extent of atrophy was significantly reduced upon gene silencing of CUG-BP1 in atrophic muscle. These findings improve our understanding of calcium signaling related biological function of CUG-BP1 in muscle atrophy. Thus, we provide an intriguing perspective of involvement of mis-regulated RyR1 splicing in muscular disease.
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Affiliation(s)
- Yinglong Tang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China.,University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Huiwen Wang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Bin Wei
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan 48201
| | - Yuting Guo
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Gu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China.,University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiguang Yang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China.,University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Qing Zhang
- Department of Anesthesiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
| | - Yanyun Wu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Qi Yuan
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
| | - Gang Zhao
- Department of Neurology, Xijing Hospital, Forth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Guangju Ji
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China
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Yoshihara T, Sugiura T, Yamamoto Y, Shibaguchi T, Kakigi R, Naito H. The response of apoptotic and proteolytic systems to repeated heat stress in atrophied rat skeletal muscle. Physiol Rep 2015; 3:3/10/e12597. [PMID: 26508739 PMCID: PMC4632963 DOI: 10.14814/phy2.12597] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
We examined the effect of repeated heat stress on muscle atrophy, and apoptotic and proteolytic regulation in unloaded rat slow- and fast-type skeletal muscles. Forty male Wistar rats (11 week-old) were divided into control (CT), hindlimb unweighting (HU), intermittent weight-bearing during HU (HU + IWB), and intermittent weight-bearing with heat stress during HU (41–41.5°C for 30 min; HU + IWB + HS) groups. The HU + IWB + HS and HU + IWB groups were released from unloading for 1 h every second day, during which the HU + IWB + HS group underwent the heating. Our results revealed that repeated bouts of heat stress resulted in protection against disuse muscle atrophy in both soleus and plantaris muscles. This heat stress–induced protection against disuse-induced muscular atrophy may be partially due to reduced apoptotic activation in both muscles, and decreased ubiquitination in only the soleus muscle. We concluded that repeated heat stress attenuated skeletal muscle atrophy via suppressing apoptosis but the response to proteolytic systems depend on the muscle phenotype.
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Affiliation(s)
- Toshinori Yoshihara
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Chiba, Japan
| | - Takao Sugiura
- Faculty of Education, Yamaguchi University, Yoshida, Yamaguchi, Japan
| | - Yuki Yamamoto
- Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Tsubasa Shibaguchi
- Graduate School of Frontier Biosciences, Osaka University, Toyonaka, Osaka, Japan
| | - Ryo Kakigi
- Faculty of Medicine, Juntendo University, Bunkyo-ku, Tokyo, Japan
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University, Inzai, Chiba, Japan
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47
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Myostatin Activates the Ubiquitin-Proteasome and Autophagy-Lysosome Systems Contributing to Muscle Wasting in Chronic Kidney Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:684965. [PMID: 26448817 PMCID: PMC4584061 DOI: 10.1155/2015/684965] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/18/2014] [Accepted: 12/11/2014] [Indexed: 12/24/2022]
Abstract
Our evidence demonstrated that CKD upregulated the expression of myostatin, TNF-α, and p-IkBa and downregulated the phosphorylation of PI3K, Akt, and FoxO3a, which were also associated with protein degradation and muscle atrophy. The autophagosome formation and protein expression of autophagy-related genes were increased in muscle of CKD rats. The mRNA level and protein expression of MAFbx and MuRF-1 were also upregulated in CKD rats, as well as proteasome activity of 26S. Moreover, activation of myostatin elicited by TNF-α induces C2C12 myotube atrophy via upregulating the expression of autophagy-related genes, including MAFbx and MuRF1 and proteasome subunits. Inactivation of FoxO3a triggered by PI3K inhibitor LY294002 prevented the myostatin-induced increase of expression of MuRF1, MAFbx, and LC3-II protein in C2C12 myotubes. The findings were further consolidated by using siRNA interference and overexpression of myostatin. Additionally, expression of myostatin was activated by TNF-α via a NF-κB dependent pathway in C2C12 myotubes, while inhibition of NF-κB activity suppressed myostatin and improved myotube atrophy. Collectively, myostatin mediated CKD-induced muscle catabolism via coordinate activation of the autophagy and the ubiquitin-proteasome systems.
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48
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Lee YH, Kim WJ, Lee MH, Kim SY, Seo DH, Kim HS, Gelinsky M, Kim TJ. Anti-skeletal muscle atrophy effect of Oenothera odorata root extract via reactive oxygen species-dependent signaling pathways in cellular and mouse model. Biosci Biotechnol Biochem 2015; 80:80-8. [PMID: 26613402 DOI: 10.1080/09168451.2015.1075861] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Skeletal muscle atrophy can be defined as a decrease of muscle volume caused by injury or lack of use. This condition is associated with reactive oxygen species (ROS), resulting in various muscular disorders. We acquired 2D and 3D images using micro-computed tomography in gastrocnemius and soleus muscles of sciatic-denervated mice. We confirmed that sciatic denervation-small animal model reduced muscle volume. However, the intraperitoneal injection of Oenothera odorata root extract (EVP) delayed muscle atrophy compared to a control group. We also investigated the mechanism of muscle atrophy's relationship with ROS. EVP suppressed expression of SOD1, and increased expression of HSP70, in both H2O2-treated C2C12 myoblasts and sciatic-denervated mice. Moreover, EVP regulated apoptotic signals, including caspase-3, Bax, Bcl-2, and ceramide. These results indicate that EVP has a positive effect on reducing the effect of ROS on muscle atrophy.
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Affiliation(s)
- Yong-Hyeon Lee
- a Division of Biological Science and Technology, Yonsei-Fraunhofer Medical Device Lab , College of Science and Technology, Yonsei University , Wonju , Korea
| | - Wan-Joong Kim
- a Division of Biological Science and Technology, Yonsei-Fraunhofer Medical Device Lab , College of Science and Technology, Yonsei University , Wonju , Korea
| | - Myung-Hun Lee
- a Division of Biological Science and Technology, Yonsei-Fraunhofer Medical Device Lab , College of Science and Technology, Yonsei University , Wonju , Korea
| | - Sun-Young Kim
- a Division of Biological Science and Technology, Yonsei-Fraunhofer Medical Device Lab , College of Science and Technology, Yonsei University , Wonju , Korea
| | - Dong-Hyun Seo
- b Department of Biomedical Engineering, Yonsei-Fraunhofer Medical Device Lab , College of Health Science, Yonsei University , Wonju , Korea
| | - Han-Sung Kim
- b Department of Biomedical Engineering, Yonsei-Fraunhofer Medical Device Lab , College of Health Science, Yonsei University , Wonju , Korea
| | - Michael Gelinsky
- c Center for Translational Bone, Joint and Soft Tissue Research, Medical Faculty and University Hospital, Technische Universität Dresden , Dresden , Germany
| | - Tack-Joong Kim
- a Division of Biological Science and Technology, Yonsei-Fraunhofer Medical Device Lab , College of Science and Technology, Yonsei University , Wonju , Korea
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Tryon LD, Crilly MJ, Hood DA. Effect of denervation on the regulation of mitochondrial transcription factor A expression in skeletal muscle. Am J Physiol Cell Physiol 2015; 309:C228-38. [PMID: 26063705 DOI: 10.1152/ajpcell.00266.2014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 06/03/2015] [Indexed: 11/22/2022]
Abstract
The purpose of this study was to determine how the expression of mitochondrial transcription factor A (Tfam), a protein that governs mitochondrial DNA (mtDNA) transcription and replication, is regulated during a state of reduced organelle content imposed by muscle disuse. We measured Tfam expression at 8 h, 16 h, 24 h, 3 days, or 7 days following denervation and hypothesized that decreases in Tfam expression would precede mitochondrial loss. Muscle mass was lowered by 13% and 38% at 3 and 7 days postdenervation, while cytochrome c oxidase activity fell by 33% and 39% at the same time points. Tfam promoter activation in vivo was reduced by 30-65% between 8 h and 3 days of denervation, while Tfam transcript half-life was increased following 8-24 h of denervation. Protein expression of RNA-binding proteins that promote mRNA degradation (CUG repeat-binding protein and K homology splicing regulator protein) was elevated at 3 and 7 days of denervation. Tfam localization within subsarcolemmal mitochondria was reduced after 3 and 7 days of denervation and was associated with suppression of the cytochrome c oxidase type I transcript at 3 days, indicating that denervation impairs both mitochondrial Tfam import and mtDNA transcription during an early period following denervation. These data suggest that putative signals downregulate Tfam transcription during the earliest stages following denervation but are counteracted by increases in Tfam mRNA stability. Import of Tfam into the mitochondrion seems to be the most critical point of regulation of this protein during the early onset of denervation, an impairment of which is coincident with the loss of mitochondria during muscle disuse.
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Affiliation(s)
- Liam D Tryon
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada; and School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Matthew J Crilly
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada; and School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - David A Hood
- Muscle Health Research Centre, York University, Toronto, Ontario, Canada; and School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
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50
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Wilson WN, Baumgarner BL, Watanabe WO, Alam MS, Kinsey ST. Effects of resveratrol on growth and skeletal muscle physiology of juvenile southern flounder. Comp Biochem Physiol A Mol Integr Physiol 2015; 183:27-35. [DOI: 10.1016/j.cbpa.2014.12.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/09/2014] [Accepted: 12/09/2014] [Indexed: 01/28/2023]
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