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The Role of Reactive Oxygen Species in the Life Cycle of the Mitochondrion. Int J Mol Sci 2020; 21:ijms21062173. [PMID: 32245255 PMCID: PMC7139706 DOI: 10.3390/ijms21062173] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/12/2020] [Accepted: 03/19/2020] [Indexed: 02/07/2023] Open
Abstract
Currently, it is known that, in living systems, free radicals and other reactive oxygen and nitrogen species play a double role, because they can cause oxidative damage and tissue dysfunction and serve as molecular signals activating stress responses that are beneficial to the organism. It is also known that mitochondria, because of their capacity to produce free radicals, play a major role in tissue oxidative damage and dysfunction and provide protection against excessive tissue dysfunction through several mechanisms, including the stimulation of permeability transition pore opening. This process leads to mitoptosis and mitophagy, two sequential processes that are a universal route of elimination of dysfunctional mitochondria and is essential to protect cells from the harm due to mitochondrial disordered metabolism. To date, there is significant evidence not only that the above processes are induced by enhanced reactive oxygen species (ROS) production, but also that such production is involved in the other phases of the mitochondrial life cycle. Accumulating evidence also suggests that these effects are mediated through the regulation of the expression and the activity of proteins that are engaged in processes such as genesis, fission, fusion, and removal of mitochondria. This review provides an account of the developments of the knowledge on the dynamics of the mitochondrial population, examining the mechanisms governing their genesis, life, and death, and elucidating the role played by free radicals in such processes.
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102
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Biswas AK, Acharyya S. Cancer-Associated Cachexia: A Systemic Consequence of Cancer Progression. ANNUAL REVIEW OF CANCER BIOLOGY 2020. [DOI: 10.1146/annurev-cancerbio-030419-033642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cancer is a life-threatening disease that has plagued humans for centuries. The vast majority of cancer-related mortality results from metastasis. Indeed, the invasive growth of metastatic cancer cells in vital organs causes fatal organ dysfunction, but metastasis-related deaths also result from cachexia, a debilitating wasting syndrome characterized by an involuntary loss of skeletal muscle mass and function. In fact, about 80% of metastatic cancer patients suffer from cachexia, which often renders them too weak to tolerate standard doses of anticancer therapies and makes them susceptible to death from cardiac and respiratory failure. The goals of this review are to highlight important findings that help explain how cancer-induced systemic changes drive the development of cachexia and to discuss unmet challenges and potential therapeutic strategies targeting cachexia to improve the quality of life and survival of cancer patients.
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Affiliation(s)
- Anup K. Biswas
- Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Swarnali Acharyya
- Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Pathology and Cell Biology and Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA
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103
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Phillips CA, Reading BJ, Livingston M, Livingston K, Ashwell CM. Evaluation via Supervised Machine Learning of the Broiler Pectoralis Major and Liver Transcriptome in Association With the Muscle Myopathy Wooden Breast. Front Physiol 2020; 11:101. [PMID: 32158398 PMCID: PMC7052112 DOI: 10.3389/fphys.2020.00101] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/27/2020] [Indexed: 01/07/2023] Open
Abstract
The muscle myopathy wooden breast (WB) has recently appeared in broiler production and has a negative impact on meat quality. WB is described as hard/firm consistency found within the pectoralis major (PM). In the present study, we use machine learning from our PM and liver transcriptome dataset to capture the complex relationships that are not typically revealed by traditional statistical methods. Gene expression data was evaluated between the PM and liver of birds with WB and those that were normal. Two separate machine learning algorithms were performed to analyze the data set including the sequential minimal optimization (SMO) of support vector machines (SVMs) and Multilayer Perceptron (MLP) Artificial Neural Network (ANN). Machine learning algorithms were compared to identify genes within a gene expression data set of approximately 16,000 genes for both liver and PM, which can be correctly classified from birds with or without WB. The performance of both machine learning algorithms SMO and MLP was determined using percent correct classification during the cross-validations. By evaluating the WB transcriptome datasets by 5× cross-validation using ANNs, the expression of nine genes ranked based on Shannon Entropy (Information Gain) from PM were able to correctly classify if the individual bird was normal or exhibited WB 100% of the time. These top nine genes were all protein coding and potential biomarkers. When PM gene expression data were evaluated between normal birds and those with WB using SVMs they were correctly classified 95% of the time using 450 of the top genes sorted ranked based on Shannon Entropy (Information Gain) as a preprocessing step. When evaluating the 450 attributes that were 95% correctly classified using SVMs through Ingenuity Pathway Analysis (IPA) there was an overlap in top genes identified through MLP. This analysis allowed the identification of critical transcriptional responses for the first time in both liver and muscle during the onset of WB. The information provided has revealed many molecules and pathways making up a complex molecular mechanism involved with the progression of wooden breast and suggests that the etiology of the myopathy is not limited to activity in the muscle alone, but is an altered systemic pathology.
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Affiliation(s)
- Chelsea A. Phillips
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
| | - Benjamin J. Reading
- Department of Applied Ecology, North Carolina State University, Raleigh, NC, United States
| | - Matthew Livingston
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
| | - Kimberly Livingston
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
| | - Chris M. Ashwell
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, United States
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104
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Howard EE, Pasiakos SM, Blesso CN, Fussell MA, Rodriguez NR. Divergent Roles of Inflammation in Skeletal Muscle Recovery From Injury. Front Physiol 2020; 11:87. [PMID: 32116792 PMCID: PMC7031348 DOI: 10.3389/fphys.2020.00087] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/27/2020] [Indexed: 12/23/2022] Open
Abstract
A transient increase in local pro-inflammatory cytokine expression following skeletal muscle injury mediates the repair and regeneration of damaged myofibers through myogenesis. Regenerative capacity is diminished and muscle wasting occurs, however, when intramuscular inflammatory signaling is exceedingly high or persists chronically. An excessive and persistent inflammatory response to muscle injury may therefore impair recovery by limiting the repair of damaged tissue and triggering muscle atrophy. The concentration-dependent activation of different downstream signaling pathways by several pro-inflammatory cytokines in cell and animal models support these opposing roles of post-injury inflammation. Understanding these molecular pathways is essential in developing therapeutic strategies to attenuate excessive inflammation and accelerate functional recovery and muscle mass accretion following muscle damage. This is especially relevant given the observation that basal levels of intramuscular inflammation and the inflammatory response to muscle damage are not uniform across all populations, suggesting certain individuals may be more susceptible to an excessive inflammatory response to injury that limits recovery. This narrative review explores the opposing roles of intramuscular inflammation in muscle regeneration and muscle protein turnover. Factors contributing to an exceedingly high inflammatory response to damage and age-related impairments in regenerative capacity are also considered.
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Affiliation(s)
- Emily E Howard
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT, United States.,Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA, United States.,Oak Ridge Institute for Science and Education, Oak Ridge, TN, United States
| | - Stefan M Pasiakos
- Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA, United States
| | - Christopher N Blesso
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT, United States
| | - Maya A Fussell
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT, United States
| | - Nancy R Rodriguez
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT, United States
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105
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Townsend JR, Morimune JE, Jones MD, Beuning CN, Haase AA, Boot CM, Heffington SH, Littlefield LA, Henry RN, Marshall AC, VanDusseldorp TA, Feito Y, Mangine GT. The Effect of ProHydrolase ® on the Amino Acid and Intramuscular Anabolic Signaling Response to Resistance Exercise in Trained Males. Sports (Basel) 2020; 8:sports8020013. [PMID: 31978998 PMCID: PMC7077235 DOI: 10.3390/sports8020013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/16/2020] [Accepted: 01/18/2020] [Indexed: 11/16/2022] Open
Abstract
This double-blind study examined effects of a protease enzyme blend (Prohydrolase®) added to whey protein on post-resistance exercise aminoacidemia and intramuscular anabolic signaling were investigated in ten resistance-trained males. Participants completed 4 sets of 8-10 repetitions in the leg press and leg extension exercises at 75% of 1-repetition maximum. Participants then consumed either 250 mg of Prohydrolase® + 26 g of whey protein (PW), 26 g whey alone (W), or non-nutritive control (CON) in counterbalanced order. Blood samples were obtained prior to exercise (baseline) and then immediately-post (IP), 30-, 60-, 90-, 120-, and 180-min post-exercise. Muscle biopsies were taken at baseline, 1-h (1H), and 3-h (3H) post-exercise. Phosphorylation of AKTSer437 was decreased (3H only: p < 0.001), mTORSer2448 was increased (1H: p = 0.025; 3H: p = 0.009), and p70S6KThr412 remained unchanged similarly for each condition. Plasma leucine, branch-chained amino acids, and essential amino acid concentrations for PW were significantly higher than CON (p < 0.05) at 30 min and similar to W. Compared to IP, PW was the only treatment with elevated plasma leucine levels at 30 min (p = 0.007; ∆ = 57.8 mmol/L, 95% Confidence Interval (CI): 20.0, 95.6) and EAA levels at 180 min (p = 0.003; ∆ = 179.1 mmol/L, 95% CI: 77.5, 280.7). Area under the curve amino acid analysis revealed no differences between PW and W. While no different than W, these data indicate that PW was the only group to produce elevated amino acid concentrations 30-min and 180-min post-ingestion.
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Affiliation(s)
- Jeremy R. Townsend
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
- Correspondence:
| | - Jaclyn E. Morimune
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
| | - Megan D. Jones
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
| | - Cheryle N. Beuning
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA; (C.N.B.); (A.A.H.); (C.M.B.)
| | - Allison A. Haase
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA; (C.N.B.); (A.A.H.); (C.M.B.)
| | - Claudia M. Boot
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA; (C.N.B.); (A.A.H.); (C.M.B.)
| | - Stephen H. Heffington
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
| | - Laurel A. Littlefield
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
| | - Ruth N. Henry
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
| | - Autumn C. Marshall
- Exercise and Nutrition Science Graduate Program, Lipscomb University, Nashville, TN 37204, USA; (J.E.M.); (M.D.J.); (S.H.H.); (L.A.L.); (R.N.H.); (A.C.M.)
| | - Trisha A. VanDusseldorp
- Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA 30144, USA; (T.A.V.); (Y.F.); (G.T.M.)
| | - Yuri Feito
- Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA 30144, USA; (T.A.V.); (Y.F.); (G.T.M.)
| | - Gerald T. Mangine
- Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA 30144, USA; (T.A.V.); (Y.F.); (G.T.M.)
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106
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Ono Y, Maejima Y, Saito M, Sakamoto K, Horita S, Shimomura K, Inoue S, Kotani J. TAK-242, a specific inhibitor of Toll-like receptor 4 signalling, prevents endotoxemia-induced skeletal muscle wasting in mice. Sci Rep 2020; 10:694. [PMID: 31959927 PMCID: PMC6970997 DOI: 10.1038/s41598-020-57714-3] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 01/07/2020] [Indexed: 02/07/2023] Open
Abstract
Circulating lipopolysaccharide (LPS) concentrations are often elevated in patients with sepsis or various endogenous diseases related to bacterial translocation from the gut. Systemic inflammatory responses induced by endotoxemia induce severe involuntary loss of skeletal muscle, termed muscle wasting, which adversely affects the survival and functional outcomes of these patients. Currently, no drugs are available for the treatment of endotoxemia-induced skeletal muscle wasting. Here, we tested the effects of TAK-242, a Toll-like receptor 4 (TLR4)-specific signalling inhibitor, on myotube atrophy in vitro and muscle wasting in vivo induced by endotoxin. LPS treatment of murine C2C12 myotubes induced an inflammatory response (increased nuclear factor-κB activity and interleukin-6 and tumour necrosis factor-α expression) and activated the ubiquitin-proteasome and autophagy proteolytic pathways (increased atrogin-1/MAFbx, MuRF1, and LC-II expression), resulting in myotube atrophy. In mice, LPS injection increased the same inflammatory and proteolytic pathways in skeletal muscle and induced atrophy, resulting in reduced grip strength. Notably, pretreatment of cells or mice with TAK-242 reduced or reversed all the detrimental effects of LPS in vitro and in vivo. Collectively, our results indicate that pharmacological inhibition of TLR4 signalling may be a novel therapeutic intervention for endotoxemia-induced muscle wasting.
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Affiliation(s)
- Yuko Ono
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, 650-0017, Japan. .,Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, 960-1295, Japan.
| | - Yuko Maejima
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, 960-1295, Japan
| | - Masafumi Saito
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, 650-0017, Japan
| | - Kazuho Sakamoto
- Department of Bio-Informational Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Shoichiro Horita
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, 960-1295, Japan
| | - Kenju Shimomura
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, 960-1295, Japan
| | - Shigeaki Inoue
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, 650-0017, Japan
| | - Joji Kotani
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, 650-0017, Japan
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107
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Mukund K, Subramaniam S. Skeletal muscle: A review of molecular structure and function, in health and disease. WILEY INTERDISCIPLINARY REVIEWS. SYSTEMS BIOLOGY AND MEDICINE 2020; 12:e1462. [PMID: 31407867 PMCID: PMC6916202 DOI: 10.1002/wsbm.1462] [Citation(s) in RCA: 216] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/03/2019] [Accepted: 07/03/2019] [Indexed: 12/11/2022]
Abstract
Decades of research in skeletal muscle physiology have provided multiscale insights into the structural and functional complexity of this important anatomical tissue, designed to accomplish the task of generating contraction, force and movement. Skeletal muscle can be viewed as a biomechanical device with various interacting components including the autonomic nerves for impulse transmission, vasculature for efficient oxygenation, and embedded regulatory and metabolic machinery for maintaining cellular homeostasis. The "omics" revolution has propelled a new era in muscle research, allowing us to discern minute details of molecular cross-talk required for effective coordination between the myriad interacting components for efficient muscle function. The objective of this review is to provide a systems-level, comprehensive mapping the molecular mechanisms underlying skeletal muscle structure and function, in health and disease. We begin this review with a focus on molecular mechanisms underlying muscle tissue development (myogenesis), with an emphasis on satellite cells and muscle regeneration. We next review the molecular structure and mechanisms underlying the many structural components of the muscle: neuromuscular junction, sarcomere, cytoskeleton, extracellular matrix, and vasculature surrounding muscle. We highlight aberrant molecular mechanisms and their possible clinical or pathophysiological relevance. We particularly emphasize the impact of environmental stressors (inflammation and oxidative stress) in contributing to muscle pathophysiology including atrophy, hypertrophy, and fibrosis. This article is categorized under: Physiology > Mammalian Physiology in Health and Disease Developmental Biology > Developmental Processes in Health and Disease Models of Systems Properties and Processes > Cellular Models.
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Affiliation(s)
- Kavitha Mukund
- Department of BioengineeringUniversity of CaliforniaSan DiegoCalifornia
| | - Shankar Subramaniam
- Department of Bioengineering, Bioinformatics & Systems BiologyUniversity of CaliforniaSan DiegoCalifornia
- Department of Computer Science and EngineeringUniversity of CaliforniaSan DiegoCalifornia
- Department of Cellular and Molecular Medicine and NanoengineeringUniversity of CaliforniaSan DiegoCalifornia
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108
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Yu XH, Wu JX, Chen L, Gu YD. Inflammation and apoptosis accelerate progression to irreversible atrophy in denervated intrinsic muscles of the hand compared with biceps: proteomic analysis of a rat model of obstetric brachial plexus palsy. Neural Regen Res 2020; 15:1326-1332. [PMID: 31960820 PMCID: PMC7047792 DOI: 10.4103/1673-5374.272619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In treating patients with obstetric brachial plexus palsy, we noticed that denervated intrinsic muscles of the hand become irreversibly atrophic at a faster than denervated biceps. In a rat model of obstetric brachial plexus palsy, denervated intrinsic musculature of the forepaw entered the irreversible atrophy far earlier than denervated biceps. In this study, isobaric tags for relative and absolute quantitation were examined in the intrinsic musculature of forepaw and biceps on denervated and normal sides at 3 and 5 weeks to identify dysregulated proteins. Enrichment of pathways mapped by those proteins was analyzed by Kyoto Encyclopedia of Genes and Genomes analysis. At 3 weeks, 119 dysregulated proteins in denervated intrinsic musculature of the forepaw were mapped to nine pathways for muscle regulation, while 67 dysregulated proteins were mapped to three such pathways at 5 weeks. At 3 weeks, 27 upregulated proteins were mapped to five pathways involving inflammation and apoptosis, while two upregulated proteins were mapped to one such pathway at 5 weeks. At 3 and 5 weeks, 53 proteins from pathways involving regrowth and differentiation were downregulated. At 3 weeks, 64 dysregulated proteins in denervated biceps were mapped to five pathways involving muscle regulation, while, five dysregulated proteins were mapped to three such pathways at 5 weeks. One protein mapped to inflammation and apoptotic pathways was upregulated from one pathway at 3 weeks, while three proteins were downregulated from two other pathways at 5 weeks. Four proteins mapped to regrowth and differentiation pathways were upregulated from three pathways at 3 weeks, while two proteins were downregulated in another pathway at 5 weeks. These results implicated inflammation and apoptosis as critical factors aggravating atrophy of denervated intrinsic muscles of the hand during obstetric brachial plexus palsy. All experimental procedures and protocols were approved by the Experimental Animal Ethics Committee of Fudan University, China (approval No. DF-325) in January 2015.
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Affiliation(s)
- Xiao-Heng Yu
- Department of Hand Surgery, Huashan Hospital and Institutes of Biomedical Sciences, Fudan University; Shanghai Key Laboratory of Peripheral Nerve and Microsurgery, Shanghai, China
| | - Ji-Xin Wu
- Department of Hand Surgery, Huashan Hospital and Institutes of Biomedical Sciences, Fudan University; Shanghai Key Laboratory of Peripheral Nerve and Microsurgery, Shanghai, China
| | - Liang Chen
- Department of Hand Surgery, Huashan Hospital and Institutes of Biomedical Sciences, Fudan University; Shanghai Key Laboratory of Peripheral Nerve and Microsurgery, Shanghai, China
| | - Yu-Dong Gu
- Department of Hand Surgery, Huashan Hospital and Institutes of Biomedical Sciences, Fudan University; Shanghai Key Laboratory of Peripheral Nerve and Microsurgery, Shanghai, China
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109
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Herremans KM, Riner AN, Cameron ME, Trevino JG. The Microbiota and Cancer Cachexia. Int J Mol Sci 2019; 20:ijms20246267. [PMID: 31842339 PMCID: PMC6940781 DOI: 10.3390/ijms20246267] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 12/05/2019] [Accepted: 12/10/2019] [Indexed: 12/12/2022] Open
Abstract
Cancer cachexia is a multifactorial syndrome defined by weight loss, muscle wasting, and systemic inflammation. It affects the majority of patients with advanced cancer and is associated with poor treatment response, early mortality and decreased quality of life. The microbiota has been implicated in cancer cachexia through pathways of systemic inflammation, gut barrier dysfunction and muscle wasting. The imbalance of the microbiota, known as dysbiosis, has been shown to influence cancer cachexia. Bacteria that play beneficial and detrimental roles in the disease pathogenesis have been identified. The phenotype of cancer cachexia is associated with decreased levels of Lactobacillales and increased levels of Enterobacteriaceae and Parabacteroides. Currently, there are no treatment options that demonstrate increased survival or the quality of life in patients suffering from cancer cachexia. Through the manipulation of beneficial bacteria in the gut microbiota, different treatment options have been explored. Prebiotics and probiotics have been shown to improve outcomes in animal models of cachexia. Expounding on this mechanism, fecal microbiota transplant (FMT) holds promise for a future treatment of cancer cachexia. Further research is necessary to address this detrimental disease process and improve the lives of patients suffering from cancer cachexia.
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110
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Alanyl-glutamine Heals Indomethacin-induced Gastric Ulceration in Rats Via Antisecretory and Anti-apoptotic Mechanisms. J Pediatr Gastroenterol Nutr 2019; 69:710-718. [PMID: 31764439 DOI: 10.1097/mpg.0000000000002474] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Alanylglutamine (AG) is a dipeptide that fuels enterocytes and has a coadjuvant role during gut healing. The current study aimed to investigate the potential ulcer-healing effect of AG in indomethacin-induced gastropathy. METHODS Animals (n = 10 rats/group) were randomly allocated into 5 groups. Gastric ulcerated rats were administered AG, AG + dexamethasone, or pantoprazole after indomethacin exposure. RESULTS Comparable to pantoprazole, AG inhibited H-KATPase pump, and elevated the pH of gastric juice. Moreover, the dipeptide increased the serum/mucosal contents of glucagon-like peptide-1 (GLP-1), pS473-Akt, and cyclin-D1. On the contrary, AG abated serum tumor necrosis factor-α and gastric mucosal content of pS45-β catenin, pS9-GSK3β, pS133-CREB, pS536-NF-κB, H2O2, claudin-1, and caspase-3. The administration of dexamethasone before AG hampered its effect on almost all the measured parameters. CONCLUSIONS AG confers its antiulcerogenic/antisecretory potentials by repressing the proton pump to increase the gastric juice pH via boosting p-CREB, p-Akt, p-GSK-3β, and GLP-1. Also, it inhibits apoptosis through suppressing nuclear factor-kappa B/tumor necrosis factor-α/H2O2/claudin-1 cue. This trajectory contributes to loosen the tight junction priming AG-mediated GLP-1/β-catenin/cyclin-D1 that results in pronounced increase in gastric mucosa proliferation. Therefore, the crosstalk between multiple pathways orchestrates the action of AG against gastric ulceration.
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111
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Exploring the Interface between Inflammatory and Therapeutic Glucocorticoid Induced Bone and Muscle Loss. Int J Mol Sci 2019; 20:ijms20225768. [PMID: 31744114 PMCID: PMC6888251 DOI: 10.3390/ijms20225768] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 02/02/2023] Open
Abstract
Due to their potent immunomodulatory anti-inflammatory properties, synthetic glucocorticoids (GCs) are widely utilized in the treatment of chronic inflammatory disease. In this review, we examine our current understanding of how chronic inflammation and commonly used therapeutic GCs interact to regulate bone and muscle metabolism. Whilst both inflammation and therapeutic GCs directly promote systemic osteoporosis and muscle wasting, the mechanisms whereby they achieve this are distinct. Importantly, their interactions in vivo are greatly complicated secondary to the directly opposing actions of GCs on a wide array of pro-inflammatory signalling pathways that underpin catabolic and anti-anabolic metabolism. Several clinical studies have attempted to address the net effects of therapeutic glucocorticoids on inflammatory bone loss and muscle wasting using a range of approaches. These have yielded a wide array of results further complicated by the nature of inflammatory disease, underlying the disease management and regimen of GC therapy. Here, we report the latest findings related to these pathway interactions and explore the latest insights from murine models of disease aimed at modelling these processes and delineating the contribution of pre-receptor steroid metabolism. Understanding these processes remains paramount in the effective management of patients with chronic inflammatory disease.
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112
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Li Y, Zhang F, Modrak S, Little A, Zhang H. Chronic Alcohol Consumption Enhances Skeletal Muscle Wasting in Mice Bearing Cachectic Cancers: The Role of TNFα/Myostatin Axis. Alcohol Clin Exp Res 2019; 44:66-77. [PMID: 31657476 DOI: 10.1111/acer.14221] [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: 07/23/2019] [Revised: 10/03/2019] [Accepted: 10/23/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Chronic alcohol consumption enhances cancer-associated cachexia, which is one of the major causes of decreased survival. The precise molecular mechanism of how alcohol consumption enhances cancer-associated cachexia, especially skeletal muscle loss, remains to be elucidated. METHODS We used a mouse model of chronic alcohol consumption, in which 20% (w/v) alcohol was provided as sole drinking fluid, and Lewis lung carcinoma to study the underlying mechanisms. RESULTS We found that alcohol consumption up-regulated the expression of MAFbx, MuRF-1, and LC3 in skeletal muscle, suggesting that alcohol enhanced ubiquitin-mediated proteolysis and LC3-mediated autophagy. Alcohol consumption enhanced phosphorylation of Smad2/3, p38, and ERK and decreased the phosphorylation of FOXO1. These are the signaling molecules governing protein degradation pathways. Moreover, alcohol consumption slightly up-regulated the expression of insulin receptor substrate-1, did not affect phosphatidylinositol-3 kinase, but decreased the phosphorylation of Akt and mammalian target of rapamycin (mTOR), and down-regulated the expression of Raptor and p70 ribosomal kinase S6 kinase, suggesting that alcohol impaired protein synthesis signaling pathway in skeletal muscle of tumor-bearing mice. Alcohol consumption enhanced the expression of myostatin in skeletal muscle, plasma, and tumor, but did not affect the expression of myostatin in non-tumor-bearing mice. In TNFα knockout mice, the effects of alcohol-enhanced expression of myostatin and protein degradation-related signaling molecules, and decreased protein synthesis signaling in skeletal muscle were abolished. Consequently, alcohol consumption neither affected cancer-associated cachexia nor decreased the survival of TNFα KO mice bearing cachectic cancer. CONCLUSIONS Chronic alcohol consumption enhances cancer-associated skeletal muscle loss through suppressing Akt/mTOR-mediated protein synthesis pathway and enhancing protein degradation pathways. This process is initiated by TNFα and mediated by myostatin.
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Affiliation(s)
- Yuanfei Li
- From the Department of Pharmaceutical Sciences (YL, FZ, SM, AL, HZ) College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington.,Department of Oncology, (YL), The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Faya Zhang
- From the Department of Pharmaceutical Sciences (YL, FZ, SM, AL, HZ) College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington
| | - Samantha Modrak
- From the Department of Pharmaceutical Sciences (YL, FZ, SM, AL, HZ) College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington
| | - Alex Little
- From the Department of Pharmaceutical Sciences (YL, FZ, SM, AL, HZ) College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington
| | - Hui Zhang
- From the Department of Pharmaceutical Sciences (YL, FZ, SM, AL, HZ) College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington
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113
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Vasilyeva LI, Egudina ED, Kalashnikova OS, Zhivilo IA, Sapozhnichenko LV. [Physical rehabilitation of patients with pulmonary hypertension]. VOPROSY KURORTOLOGII, FIZIOTERAPII, I LECHEBNOĬ FIZICHESKOĬ KULTURY 2019; 96:51-60. [PMID: 31626160 DOI: 10.17116/kurort20199605151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Pulmonary arterial hypertension (PAH) is characterized by characterized by a continuous increase in precapillary pulmonary vascular resistance with a progressive decrease in cardiac output, which leads to progressive dyspnea, fatigue, and deterioration of exercise capacity. Traditionally, the patients have been advised to limit physical exercises. Recent studies suggest that there are improvements in exercise capacity, quality of life, muscle function, and pulmonary circulation when cardiovascular and pulmonary rehabilitation programs are implemented. According to the 2015 European Society of Cardiology guidelines for the management of patients with PAH, physical rehabilitation is indicated for clinically stable patients who receive drug therapy for this disease. There are various physical rehabilitation programs, but there is no generally accepted protocol for physical exercises in patients with PAH. The review highlights the pathophysiological mechanisms for reducing exercise capacity in patients with PAH; methods for assessing the right ventricular contractile reserve, the effect of physical stress on the cardiovascular system, lungs, and muscles; the existing physical rehabilitation programs, complications and ways to overcome them are considered. Clinical trials studies are also briefly analyzed; promising areas for further development and improvement of rehabilitation programs are considered.
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Affiliation(s)
- L I Vasilyeva
- Dnipropetrovsk Medical Academy, Ministry of Health of Ukraine, Dnipro, Ukraine
| | - E D Egudina
- Dnipropetrovsk Medical Academy, Ministry of Health of Ukraine, Dnipro, Ukraine
| | - O S Kalashnikova
- Dnipropetrovsk Medical Academy, Ministry of Health of Ukraine, Dnipro, Ukraine
| | - I A Zhivilo
- Academician M.D. Strazhesko National Research Center 'Institute of Cardiology', Kiev, Ukraine
| | - L V Sapozhnichenko
- Dnipropetrovsk Medical Academy, Ministry of Health of Ukraine, Dnipro, Ukraine
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114
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Resistance Training, Antioxidant Status, and Antioxidant Supplementation. Int J Sport Nutr Exerc Metab 2019; 29:539-547. [PMID: 30859847 DOI: 10.1123/ijsnem.2018-0339] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 02/08/2019] [Accepted: 02/21/2019] [Indexed: 11/18/2022]
Abstract
Resistance training is known to promote the generation of reactive oxygen species. Although this can likely upregulate the natural, endogenous antioxidant defense systems, high amounts of reactive oxygen species can cause skeletal muscle damage, fatigue, and impair recovery. To prevent these, antioxidant supplements are commonly consumed along with exercise. Recently, it has been shown that these reactive oxygen species are important for the cellular adaptation process, acting as redox signaling molecules. However, most of the research regarding antioxidant status and antioxidant supplementation with exercise has focused on endurance training. In this review, the authors discuss the evidence for resistance training modulating the antioxidant status. They also highlight the effects of combining antioxidant supplementation with resistance training on training-induced skeletal muscle adaptations.
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115
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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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116
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Sin TK, Zhang G, Zhang Z, Gao S, Li M, Li YP. Cancer Takes a Toll on Skeletal Muscle by Releasing Heat Shock Proteins-An Emerging Mechanism of Cancer-Induced Cachexia. Cancers (Basel) 2019; 11:cancers11091272. [PMID: 31480237 PMCID: PMC6770863 DOI: 10.3390/cancers11091272] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 08/21/2019] [Accepted: 08/27/2019] [Indexed: 01/03/2023] Open
Abstract
Cancer-associated cachexia (cancer cachexia) is a major contributor to the modality and mortality of a wide variety of solid tumors. It is estimated that cachexia inflicts approximately ~60% of all cancer patients and is the immediate cause of ~30% of all cancer-related death. However, there is no established treatment of this disorder due to the poor understanding of its underlying etiology. The key manifestations of cancer cachexia are systemic inflammation and progressive loss of skeletal muscle mass and function (muscle wasting). A number of inflammatory cytokines and members of the TGFβ superfamily that promote muscle protein degradation have been implicated as mediators of muscle wasting. However, clinical trials targeting some of the identified mediators have not yielded satisfactory results. Thus, the root cause of the muscle wasting associated with cancer cachexia remains to be identified. This review focuses on recent progress of laboratory studies in the understanding of the molecular mechanisms of cancer cachexia that centers on the role of systemic activation of Toll-like receptor 4 (TLR4) by cancer-released Hsp70 and Hsp90 in the development and progression of muscle wasting, and the downstream signaling pathways that activate muscle protein degradation through the ubiquitin-proteasome and the autophagy-lysosome pathways in response to TLR4 activation. Verification of these findings in humans could lead to etiology-based therapies of cancer cachexia by targeting multiple steps in this signaling cascade.
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Affiliation(s)
- Thomas K Sin
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Guohua Zhang
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Zicheng Zhang
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Song Gao
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Min Li
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
- The Vivian L. Smith Department of Neurosurgery, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Yi-Ping Li
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA.
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117
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Cui X, Zhang Y, Wang Z, Yu J, Kong Z, Ružić L. High-intensity interval training changes the expression of muscle RING-finger protein-1 and muscle atrophy F-box proteins and proteins involved in the mechanistic target of rapamycin pathway and autophagy in rat skeletal muscle. Exp Physiol 2019; 104:1505-1517. [PMID: 31357248 DOI: 10.1113/ep087601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 07/17/2019] [Indexed: 12/18/2022]
Abstract
NEW FINDINGS What is the central question of this study? What are the adaptations of protein synthesis and degradation that occur in skeletal muscle in response to high-intensity interval training (HIIT), and what are the magnitudes of the changes in response to HIIT, compared to moderate-intensity continuous training (MICT), and the mechanisms underlying these changes? What is the main finding and its importance? HIIT is more effective than MICT in altering the expression of muscle RING-finger protein-1 and muscle atrophy F-box, and enhancing the autophagic flux in rat soleus muscle. In addition, HIIT could activate the mechanistic target of rapamycin pathway. These findings suggest that HIIT might be an effective exercise strategy for health promotion in skeletal muscle. ABSTRACT This study aimed to investigate the impact of high-intensity interval training (HIIT) on the proteins involved in protein synthesis, the ubiquitin-proteasome system (UPS) and autophagy in skeletal muscle of middle-aged rats. Nine-month-old male Wistar rats (n = 56) were randomly divided into three groups: a control (C) group, a moderate-intensity continuous training (MICT) group and a HIIT group. Rats in the training groups ran on treadmills 5 days per week for 8 weeks. The MICT group ran for 50 min at 60% V ̇ O 2 max , while the HIIT group ran for 3 min at 80% of V ̇ O 2 max six times separated by 3-min periods at 40% V ̇ O 2 max . Aerobic endurance, number of autophagosomes and expression of proteins involved in protein synthesis and degradation in the soleus muscle were measured at three time points: before training, after 4 weeks and after 8 weeks of training. Compared to the C group, HIIT and MICT increased the expression of phosphorylated mechanistic target of rapamycin (mTOR) after 8 weeks (P < 0.05 and P < 0.01, respectively). HIIT increased the expression of muscle RING-finger protein-1 (MuRF-1) after 4 weeks (P < 0.01), and decreased its expression after 8 weeks (P < 0.01). Both HIIT and MICT decreased the expression of muscle atrophy F-box (MAFbx) after 4 weeks (P < 0.05). HIIT improved the expression of microtubule-associated protein 1A/1B-light chain 3 (LC3)-II (P < 0.05), and decreased the P62 content (P < 0.01) after 4 weeks. The LC3II/LC3I ratio was increased after 8 weeks (P < 0.01). This study demonstrated that HIIT could activate the mTOR pathway, alter the expression of MuRF-1 and MAFbx proteins, and enhance autophagic flux in soleus muscle of middle-aged rats.
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Affiliation(s)
- Xinwen Cui
- China Institute of Sport Science, Dongcheng District, Beijing, China.,Beijing Sport University, Haidian District, Beijing, China
| | - Yimin Zhang
- Beijing Sport University, Haidian District, Beijing, China
| | - Zan Wang
- Beijing Sport University, Haidian District, Beijing, China
| | - Jingjing Yu
- Beijing Sport University, Haidian District, Beijing, China
| | - Zhenxing Kong
- Beijing Sport University, Haidian District, Beijing, China
| | - Lana Ružić
- Faculty of Kinesiology, University of Zagreb, Department of Sport and Exercise Medicine, Zagreb, Croatia
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118
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Nicoll JX, Fry AC, Mosier EM, Olsen LA, Sontag SA. MAPK, androgen, and glucocorticoid receptor phosphorylation following high-frequency resistance exercise non-functional overreaching. Eur J Appl Physiol 2019; 119:2237-2253. [DOI: 10.1007/s00421-019-04200-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 07/29/2019] [Indexed: 12/26/2022]
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119
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An JM, Kang EA, Han YM, Oh JY, Lee DY, Choi SH, Kim DH, Hahm KB. Dietary intake of probiotic kimchi ameliorated IL-6-driven cancer cachexia. J Clin Biochem Nutr 2019; 65:109-117. [PMID: 31592205 DOI: 10.3164/jcbn.19-10] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 02/16/2019] [Indexed: 01/01/2023] Open
Abstract
Cancer cachexia is a syndrome accompanying weight loss, skeletal muscle atrophy, and loss of adipose tissue in patients with advanced cancer. Since interleukin-6 (IL-6) is one of core mediators causing cancer cachexia and kimchi can modulate IL-6 response, we hypothesized dietary intake of kimchi can ameliorate cancer cachexia. In this study, we studied preemptive administration of kimchi can ameliorate mouse colon carcinoma cells colon (C26) adenocarcinoma-induced cancer cachexia and explored anti-cachexic mechanisms of kimchi focused on the changes of muscle atrophy, cachexic inflammation, and catabolic catastrophe. As results, dietary intake of kimchi significantly attenuated the development of cancer cachexia, presented with lesser weight loss, higher muscle preservation as well as higher survival from cancer cachexia in mice. Starting from significant inhibition of IL-6 and its signaling, kimchi afforded significant inhibition of muscle specific ubiquitin-proteasome system including inhibition of atrogin-1 and muscle ring finger protein-1 (MuRF-1) with other muscle related genes including mitofusin-2 (Mfn-2) and PGC-1α. Significant inhibition of lipolysis gene such as adipose triglyceride lipase (ATGL) and hormone-sensitive ligase (HSL) accompanied with significant induction of fatty acid synthase (FAS) and sterol response element binding protein 1 (SREBP1) was achieved with kimchi. As gene regulation, IL-6 and their receptor as well as Janus kinase 2 (JAK2) and signal transducer and activator of transcription 3 (STAT3) were significantly attenuated with kimchi. In conclusion, dietary intake of cancer preventive kimchi can be an anticipating option to ameliorate cancer cachexia via suppressive action of IL-6 accompanied with decreased muscle atrophy and lipolysis.
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Affiliation(s)
- Jeong Min An
- CHA Cancer Prevention Research Center, CHA Bio Complex, 335 Pangyo-ro, Bundang-gu, Seongnam, Korea
| | - Eun A Kang
- CHA Cancer Prevention Research Center, CHA Bio Complex, 335 Pangyo-ro, Bundang-gu, Seongnam, Korea
| | - Young-Min Han
- CHA Cancer Prevention Research Center, CHA Bio Complex, 335 Pangyo-ro, Bundang-gu, Seongnam, Korea
| | - Ji Young Oh
- CJ Food, Gwanggyo-ro, Yeongtong-gu, Suwon 16495, Korea
| | - Dong Yoon Lee
- CJ Food, Gwanggyo-ro, Yeongtong-gu, Suwon 16495, Korea
| | | | - Duk Hwan Kim
- Digestive Disease Center, CHA University Bundang Medical Center, 59 Yatap-ro, Bundang-gu, Seognam 13496, Korea
| | - Ki Baik Hahm
- CHA Cancer Prevention Research Center, CHA Bio Complex, 335 Pangyo-ro, Bundang-gu, Seongnam, Korea.,Digestive Disease Center, CHA University Bundang Medical Center, 59 Yatap-ro, Bundang-gu, Seognam 13496, Korea
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120
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Abstract
Skeletal muscle atrophy is a common side effect of most human diseases. Muscle loss is not only detrimental for the quality of life but it also dramatically impairs physiological processes of the organism and decreases the efficiency of medical treatments. While hypothesized for years, the existence of an atrophying programme common to all pathologies is still incompletely solved despite the discovery of several actors and key regulators of muscle atrophy. More than a decade ago, the discovery of a set of genes, whose expression at the mRNA levels were similarly altered in different catabolic situations, opened the way of a new concept: the presence of atrogenes, i.e. atrophy-related genes. Importantly, the atrogenes are referred as such on the basis of their mRNA content in atrophying muscles, the regulation at the protein level being sometimes more complicate to elucidate. It should be noticed that the atrogenes are markers of atrophy and that their implication as active inducers of atrophy is still an open question for most of them. While the atrogene family has grown over the years, it has mostly been incremented based on data coming from rodent models. Whether the rodent atrogenes are valid for humans still remain to be established. An "atrogene" was originally defined as a gene systematically up- or down-regulated in several catabolic situations. Even if recent works often restrict this notion to the up-regulation of a limited number of proteolytic enzymes, it is important to keep in mind the big picture view. In this review, we provide an update of the validated and potential rodent atrogenes and the metabolic pathways they belong, and based on recent work, their relevance in human physio-pathological situations. We also propose a more precise definition of the atrogenes that integrates rapid recovery when catabolic stimuli are stopped or replaced by anabolic ones.
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Affiliation(s)
- Daniel Taillandier
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, F-63000, Clermont-Ferrand, France.
| | - Cécile Polge
- Université Clermont Auvergne, INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, F-63000, Clermont-Ferrand, France
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121
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Di Meo S, Napolitano G, Venditti P. Mediators of Physical Activity Protection against ROS-Linked Skeletal Muscle Damage. Int J Mol Sci 2019; 20:E3024. [PMID: 31226872 PMCID: PMC6627449 DOI: 10.3390/ijms20123024] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/12/2019] [Accepted: 06/17/2019] [Indexed: 12/24/2022] Open
Abstract
Unaccustomed and/or exhaustive exercise generates excessive free radicals and reactive oxygen and nitrogen species leading to muscle oxidative stress-related damage and impaired contractility. Conversely, a moderate level of free radicals induces the body's adaptive responses. Thus, a low oxidant level in resting muscle is essential for normal force production, and the production of oxidants during each session of physical training increases the body's antioxidant defenses. Mitochondria, NADPH oxidases and xanthine oxidases have been identified as sources of free radicals during muscle contraction, but the exact mechanisms underlying exercise-induced harmful or beneficial effects yet remain elusive. However, it is clear that redox signaling influences numerous transcriptional activators, which regulate the expression of genes involved in changes in muscle phenotype. The mitogen-activated protein kinase family is one of the main links between cellular oxidant levels and skeletal muscle adaptation. The family components phosphorylate and modulate the activities of hundreds of substrates, including transcription factors involved in cell response to oxidative stress elicited by exercise in skeletal muscle. To elucidate the complex role of ROS in exercise, here we reviewed the literature dealing on sources of ROS production and concerning the most important redox signaling pathways, including MAPKs that are involved in the responses to acute and chronic exercise in the muscle, particularly those involved in the induction of antioxidant enzymes.
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Affiliation(s)
- Sergio Di Meo
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cinthia, I-80126 Napoli, Italy.
| | - Gaetana Napolitano
- Dipartimento di Scienze e Tecnologie, Università degli Studi di Napoli Parthenope, via Acton n. 38-I-80133 Napoli, Italy.
| | - Paola Venditti
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cinthia, I-80126 Napoli, Italy.
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122
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McMahon G, Morse CI, Winwood K, Burden A, Onambélé GL. Circulating Tumor Necrosis Factor Alpha May Modulate the Short-Term Detraining Induced Muscle Mass Loss Following Prolonged Resistance Training. Front Physiol 2019; 10:527. [PMID: 31130871 PMCID: PMC6509206 DOI: 10.3389/fphys.2019.00527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/12/2019] [Indexed: 12/25/2022] Open
Abstract
Introduction Tumor necrosis factor alpha (TNFα) is a pro-inflammatory cytokine that has been shown to modulate muscle mass, and is responsive to exercise training. The effects of resistance training (RT) followed by a short period of detraining on muscle size, architecture and function in combination with circulating TNFα levels have not been previously investigated in a young, healthy population. Methods Sixteen participants (8 males and 8 females) were randomly assigned to a training group (TRA; age 20 ± 3 years, mass 76 ± 7 kg), whilst fourteen participants (7 males and 7 females) age 22 ± 2 years, mass 77 ± 6 kg were assigned to a control group (CON). Measures of vastus lateralis (VL) muscle size (normalized physiological cross-sectional area allometrically scaled to body mass; npCSA), architecture (fascicle length; LF, pennation angle Pθ), strength (knee extensor maximal voluntary contraction; KE MVC), specific force, subcutaneous fat (SF) and circulating TNFα were assessed at baseline (BL), post 8 weeks RT (PT), and at two (DT1) and four (DT2) weeks of detraining. Results Pooled BL TNFα was 0.87 ± 0.28 pg/mL with no differences between groups. BL TNFα tended to be correlated with npCSA (p = 0.055) and KEMVC (p = 0.085) but not specific force (p = 0.671) or SF (p = 0.995). There were significant (p < 0.05) increases in npCSA compared to BL and CON in TRA at PT, DT1, and DT2, despite significant (p < 0.05) decreases in npCSA compared to PT at DT1 and DT2. There were significant (p < 0.05) increases in LF, Pθ and KE MVC at PT but only LF and torque at DT1. There were no significant (p > 0.05) changes in SF, specific force or TNFα at any time points. There was a significant correlation (p = 0.022, r = 0.57) between the relative changes in TNFα and npCSA at DT2 compared to PT. Discussion Neither RT nor a period of short term detraining altered the quality of muscle (i.e., specific force) despite changes in morphology and function. TNFα does not appear to have any impact on RT-induced gains in muscle size or function, however, TNFα may play a role in inflammatory-status mediated muscle mass loss during subsequent detraining in healthy adults.
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Affiliation(s)
- Gerard McMahon
- Sport and Exercise Sciences Research Institute, Ulster University, Belfast, United Kingdom.,Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Crewe, United Kingdom
| | - Christopher I Morse
- Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Crewe, United Kingdom
| | - Keith Winwood
- Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Crewe, United Kingdom
| | - Adrian Burden
- Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Crewe, United Kingdom
| | - Gladys L Onambélé
- Musculoskeletal Science and Sports Medicine Research Centre, Manchester Metropolitan University, Crewe, United Kingdom
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123
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Influence of skeletal muscle mass and fat mass on the metabolic and inflammatory profile in sarcopenic and non-sarcopenic overfat elderly. Aging Clin Exp Res 2019; 31:629-635. [PMID: 30178443 DOI: 10.1007/s40520-018-1029-3] [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: 06/26/2018] [Accepted: 08/18/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Sarcopenic elderly present low muscle mass and strength, however, it is not clear if the inflammatory and metabolic profile is more related to low lean mass or high fat mass in sarcopenic and non-sarcopenic overfat elderly. AIM To verify the difference in inflammatory and metabolic responses in sarcopenic and non-sarcopenic overfat elderly and the relationship between these markers, body composition, and strength in this population. METHODS Fifty-seven elderly were divided into two groups: sarcopenic (n = 30) and non-sarcopenic (n = 27). Body composition was evaluated with octopolar bioimpedance. Total cholesterol, high-density lipoprotein cholesterol, triacylglycerol, glucose, cortisol, leptin, adiponectin, Plasminogen activator inhibitor-1 (PAI-1), TNF-α, IL-6, IL-8, and IL-10 were assessed. The handgrip test was used to evaluate strength. RESULTS When comparing the inflammatory profile, sarcopenic individuals showed greater adiponectin concentration (p = 0.019), adiponectin/fat mass ratio (p < 0.001), adiponectin/visceral fat (p < 0.001), and higher PAI-1 (p = 0.019) than non-sarcopenic overfat elderly. After adjusting the inflammatory profile by skeletal muscle mass the significant differences between groups were maintained (p < 0.05) but no significant differences between groups were observed when adjusting by fat mass, despite a tendency to a significant difference for adiponectin concentration (p = 0.06). In addition, after adjusting leptin by fat mass there was a statistically significant lower concentration in the sarcopenic compared to non-sarcopenic overfat elderly. CONCLUSION Non-sarcopenic overfat elderly presented lower anti-inflammatory and anti-atherogenic responses than sarcopenic elderly. Furthermore, fat mass but not skeletal muscle mass seem to change these responses.
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Takisawa S, Funakoshi T, Yatsu T, Nagata K, Aigaki T, Machida S, Ishigami A. Vitamin C deficiency causes muscle atrophy and a deterioration in physical performance. Sci Rep 2019; 9:4702. [PMID: 30894591 PMCID: PMC6426981 DOI: 10.1038/s41598-019-41229-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/26/2019] [Indexed: 11/29/2022] Open
Abstract
L-Ascorbic acid (AsA) is a water-soluble antioxidant. We examined the effect of AsA deficiency on skeletal muscle using senescence marker protein-30 (SMP30)-knockout (KO) mice that are defective in AsA biosynthesis, which makes this mouse model similar to humans, to clarify the function of AsA in skeletal muscle. Eight-week-old female SMP30-KO mice were divided into the following two groups: an AsA-sufficient group [AsA(+)] that was administered 1.5 g/L AsA and an AsA-deficient group [AsA(-)] that was administered tap (AsA-free) water. At 4 weeks, the AsA content in the gastrocnemius muscle of AsA(-) mice was 0.7% compared to that in the gastrocnemius muscle of AsA(+) mice. Significantly lower weights of all muscles were observed in AsA(-) mice than those in AsA(+) mice at 12 and 16 weeks. The cross-sectional area of the soleus was significantly smaller in AsA(-) mice at 16 weeks than that in AsA(+) mice. The physical performance of AsA(-) mice was significantly less than that of AsA(+) mice at 12 weeks. Following AsA deficiency for 12 weeks, the expression of ubiquitin ligases, such as atrogin1/muscle atrophy F-box (MAFbx) and muscle RING-finger protein 1 (MuRF1), was upregulated. Furthermore, all detected effects of AsA deficiency on muscles of the AsA(-) group at 12 weeks were restored following AsA supplementation for 12 weeks. Thus, longer-term AsA deficiency is associated with muscle wasting, that this can be reversed by restoring AsA levels.
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Affiliation(s)
- Shoko Takisawa
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
- Cellular Genetics, Graduate School of Science and Engineering, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
- Department of Biomolecular Science, Faculty of Science, Toho University, Chiba, 274-8510, Japan
| | - Tomoko Funakoshi
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
| | - Tomofumi Yatsu
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
| | - Kisaburo Nagata
- Department of Biomolecular Science, Faculty of Science, Toho University, Chiba, 274-8510, Japan
| | - Toshiro Aigaki
- Cellular Genetics, Graduate School of Science and Engineering, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Shuichi Machida
- Graduate School of Health and Sports Science, Juntendo University, Chiba, 270-1695, Japan
| | - Akihito Ishigami
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan.
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125
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The role of omega 3 fatty acids in suppressing muscle protein catabolism: A possible therapeutic strategy to reverse cancer cachexia? J Funct Foods 2019. [DOI: 10.1016/j.jff.2018.12.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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126
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Yoshioka Y, Kubota Y, Samukawa Y, Yamashita Y, Ashida H. Glabridin inhibits dexamethasone-induced muscle atrophy. Arch Biochem Biophys 2019; 664:157-166. [DOI: 10.1016/j.abb.2019.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 02/07/2019] [Accepted: 02/12/2019] [Indexed: 01/01/2023]
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Larsson L, Degens H, Li M, Salviati L, Lee YI, Thompson W, Kirkland JL, Sandri M. Sarcopenia: Aging-Related Loss of Muscle Mass and Function. Physiol Rev 2019; 99:427-511. [PMID: 30427277 DOI: 10.1152/physrev.00061.2017] [Citation(s) in RCA: 734] [Impact Index Per Article: 146.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Sarcopenia is a loss of muscle mass and function in the elderly that reduces mobility, diminishes quality of life, and can lead to fall-related injuries, which require costly hospitalization and extended rehabilitation. This review focuses on the aging-related structural changes and mechanisms at cellular and subcellular levels underlying changes in the individual motor unit: specifically, the perikaryon of the α-motoneuron, its neuromuscular junction(s), and the muscle fibers that it innervates. Loss of muscle mass with aging, which is largely due to the progressive loss of motoneurons, is associated with reduced muscle fiber number and size. Muscle function progressively declines because motoneuron loss is not adequately compensated by reinnervation of muscle fibers by the remaining motoneurons. At the intracellular level, key factors are qualitative changes in posttranslational modifications of muscle proteins and the loss of coordinated control between contractile, mitochondrial, and sarcoplasmic reticulum protein expression. Quantitative and qualitative changes in skeletal muscle during the process of aging also have been implicated in the pathogenesis of acquired and hereditary neuromuscular disorders. In experimental models, specific intervention strategies have shown encouraging results on limiting deterioration of motor unit structure and function under conditions of impaired innervation. Translated to the clinic, if these or similar interventions, by saving muscle and improving mobility, could help alleviate sarcopenia in the elderly, there would be both great humanitarian benefits and large cost savings for health care systems.
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Affiliation(s)
- Lars Larsson
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - Hans Degens
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - Meishan Li
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - Leonardo Salviati
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - Young Il Lee
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - Wesley Thompson
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - James L Kirkland
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
| | - Marco Sandri
- Department of Physiology and Pharmacology, Basic and Clinical Muscle Biology Group, 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, Pennsylvania ; School of Healthcare Science, Metropolitan University , Manchester , United Kingdom ; Institute of Sport Science and Innovations, Lithuanian Sports University , Kaunas , Lithuania ; Clinical Genetics Unit, Department of Woman and Child Health, University of Padova , Padova , Italy ; IRP Città della Speranza, Padova , Italy ; Department of Biology, Texas A&M University , College Station, Texas ; Robert and Arlene Kogod Center on Aging, Mayo Clinic , Rochester, Minnesota ; Department of Biomedical Science, Venetian Institute of Molecular Medicine, University of Padova , Padova , Italy
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van Dijk DP, Krill M, Farshidfar F, Li T, Rensen SS, Olde Damink SW, Dixon E, Sutherland FR, Ball CG, Mazurak VC, Baracos VE, Bathe OF. Host phenotype is associated with reduced survival independent of tumour biology in patients with colorectal liver metastases. J Cachexia Sarcopenia Muscle 2019; 10:123-130. [PMID: 30378742 PMCID: PMC6438330 DOI: 10.1002/jcsm.12358] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/24/2018] [Accepted: 09/13/2018] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Most prognostic scoring systems for colorectal liver metastases (CRLMs) account for factors related to tumour biology. Little is known about the effects of the host phenotype to the tumour. Our objective was to delineate the relationship of systemic inflammation and body composition features [i.e. low skeletal muscle mass (sarcopenia) and low visceral adipose tissue (VAT)], two well-described host phenotypes in cancer. METHODS Clinical data and pre-operative blood samples were collected from 99 patients who underwent resection of CRLM. Pre-operative computed tomography scans were available for 97 patients; body composition was analysed at the L3 level, stratified for sex and age. Clinicopathological variables, serum C-reactive protein (CRP), and various body composition variables were evaluated. Overall survival was evaluated as a function of these same variables in multivariate Cox regression analysis. RESULTS Skeletal muscle was significantly correlated with VAT (r = 0.46, P < 0.001). Of patients with sarcopenia, 35 (65%) also had low VAT. C-reactive protein was elevated (≥5 mg/mL) in 42 patients (43.3%). Elevated CRP was more common in patients with sarcopenia (73.8% vs. 51.1%, P = 0.029). The most significant prognostic factors were the coincidence of elevated CRP and adverse body composition features (sarcopenia and/or low VAT; hazard ratio 4.3, 95% confidence interval 1.5-13.0, P = 0.008), as well as Fong clinical prognostic score (hazard ratio 2.9, 95% confidence interval 1.5-5.5, P = 0.002). CONCLUSIONS Body composition in patients with CRLM is not directly linked to the presence of systemic inflammation. However, when systemic inflammation coincides with sarcopenia and/or low VAT, prognosis is adversely affected, independent of the Fong clinical prognostic score.
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Affiliation(s)
- David P.J. van Dijk
- Department of SurgeryMaastricht University Medical CentreMaastrichtThe Netherlands
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht UniversityMaastrichtThe Netherlands
| | - Matthew Krill
- Department of Surgery and Oncology, Tom Baker Cancer CentreUniversity of CalgaryCalgaryCanada
| | | | - Ting Li
- Department of Surgery and Oncology, Tom Baker Cancer CentreUniversity of CalgaryCalgaryCanada
| | - Sander S. Rensen
- Department of SurgeryMaastricht University Medical CentreMaastrichtThe Netherlands
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht UniversityMaastrichtThe Netherlands
| | - Steven W.M. Olde Damink
- Department of SurgeryMaastricht University Medical CentreMaastrichtThe Netherlands
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht UniversityMaastrichtThe Netherlands
- Department of General, Visceral and Transplantation SurgeryRWTH University Hospital AachenAachenGermany
- Institute for Liver and Digestive HealthUniversity College LondonLondonUK
| | - Elijah Dixon
- Department of Surgery and Oncology, Tom Baker Cancer CentreUniversity of CalgaryCalgaryCanada
| | - Francis R. Sutherland
- Department of Surgery and Oncology, Tom Baker Cancer CentreUniversity of CalgaryCalgaryCanada
| | - Chad G. Ball
- Department of Surgery and Oncology, Tom Baker Cancer CentreUniversity of CalgaryCalgaryCanada
| | - Vera C. Mazurak
- Division of Human Nutrition, Department of Agricultural, Food and Nutritional ScienceUniversity of AlbertaEdmontonCanada
| | | | - Oliver F. Bathe
- Department of Surgery and Oncology, Tom Baker Cancer CentreUniversity of CalgaryCalgaryCanada
- Arnie Charbonneau Cancer InstituteCalgaryCanada
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Yang J, Zhang Z, Zhang Y, Ni X, Zhang G, Cui X, Liu M, Xu C, Zhang Q, Zhu H, Yan J, Zhu VF, Luo Y, Hagan JP, Li Z, Fang J, Jatoi A, Fernandez-Zapico ME, Zheng L, Edil BH, Bronze MS, Houchen CW, Li YP, Li M. ZIP4 Promotes Muscle Wasting and Cachexia in Mice With Orthotopic Pancreatic Tumors by Stimulating RAB27B-Regulated Release of Extracellular Vesicles From Cancer Cells. Gastroenterology 2019; 156:722-734.e6. [PMID: 30342032 PMCID: PMC6878980 DOI: 10.1053/j.gastro.2018.10.026] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 09/13/2018] [Accepted: 10/09/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND & AIMS Cachexia, which includes muscle wasting, is a frequent complication of pancreatic cancer. There are no therapies that reduce cachexia and increase patient survival, so it is important to learn more about its mechanisms. The zinc transporter ZIP4 promotes growth and metastasis of pancreatic tumors. We investigated its effects on muscle catabolism via extracellular vesicle (EV)-mediated stimulation of mitogen-activated protein kinase 14 (p38 MAPK). METHODS We studied nude mice with orthotopic tumors grown from human pancreatic cancer cell lines (AsPC-1 and BxPC-3); tumors were removed 8 days after cell injection and analyzed by histology. Mouse survival was analyzed by Kaplan-Meier curves. ZIP4 was knocked down in AsPC-1 and BxPC-3 cells with small hairpin RNAs; cells with empty vectors were used as controls. Muscle tissues were collected from mice and analyzed by histology and immunohistochemistry. Conditioned media from cell lines and 3-dimensional spheroid/organoid cultures of cancer cells were applied to C2C12 myotubes. The myotubes and the media were analyzed by immunoblots, enzyme-linked immunosorbent assays, and immunofluorescence microscopy. EVs were isolated from conditioned media and analyzed by immunoblots. RESULTS Mice with orthotopic tumors grown from pancreatic cancer cells with knockdown of ZIP4 survived longer and lost less body weight and muscle mass than mice with control tumors. Conditioned media from cancer cells activated p38 MAPK, induced expression of F-box protein 32 and UBR2 in C2C12 myotubes, and also led to loss of myofibrillar protein myosin heavy chain and myotube thinning. Knockdown of ZIP4 in cancer cells reduced these effects. ZIP4 knockdown also reduced pancreatic cancer cell release of heat shock protein (HSP) 70 and HSP90, which are associated with EVs, by decreasing CREB-regulated expression of RAB27B. CONCLUSIONS ZIP4 promotes growth of orthotopic pancreatic tumors in mice and loss of muscle mass by activating CREB-regulated expression of RAB27B, required for release of EVs from pancreatic cancer cells. These EVs activate p38 MAPK and induce expression of F-box protein 32 and UBR2 in myotubes, leading to loss of myofibrillar myosin heavy chain and myotube thinning. Strategies to disrupt these pathways might be developed to reduce pancreatic cancer progression and accompanying cachexia.
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Affiliation(s)
- Jingxuan Yang
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Zicheng Zhang
- Department of Integrative Biology & Pharmacology, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Yuqing Zhang
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Xiaoling Ni
- The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA,Department of General Surgery, Zhongshan Hospital, Shanghai Medical College, Fudan University, 180 Fenglin Road, Shanghai, 200032, China
| | - Guohua Zhang
- Department of Integrative Biology & Pharmacology, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Xiaobo Cui
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Mingyang Liu
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Can Xu
- The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA,Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Qiang Zhang
- The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Huiyun Zhu
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Jie Yan
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA,Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Vivian F. Zhu
- The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Yusheng Luo
- The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - John P. Hagan
- The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
| | - Zhaoshen Li
- Department of Gastroenterology, Changhai Hospital, Shanghai, China
| | - Jing Fang
- The Key Lab of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China,Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao, 266061, China
| | - Aminah Jatoi
- Department of Oncology, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Lei Zheng
- The Sidney Kimmel Comprehensive Cancer Center and Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Barish H. Edil
- Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Michael S. Bronze
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Courtney W. Houchen
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Yi-Ping Li
- Department of Integrative Biology and Pharmacology, the University of Texas Health Science Center at Houston, Houston, Texas.
| | - Min Li
- Department of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; Department of Surgery, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma; The Vivian L. Smith Department of Neurosurgery, the University of Texas Health Science Center at Houston, Houston, Texas; Department of Integrative Biology and Pharmacology, the University of Texas Health Science Center at Houston, Houston, Texas.
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Zhou G, Gui X, Chen R, Fu X, Ji X, Ding H. Elevated serum Activin A in chronic obstructive pulmonary disease with skeletal muscle wasting. Clinics (Sao Paulo) 2019; 74:e981. [PMID: 31271588 PMCID: PMC6585865 DOI: 10.6061/clinics/2019/e981] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 03/19/2019] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Muscle wasting contributes to the reduced quality of life and increased mortality in chronic obstructive pulmonary disease (COPD). Muscle atrophy in mice with cachexia was caused by Activin A binding to ActRIIB. The role of circulating Activin A leading to muscle atrophy in COPD remains elusive. METHODS In the present study, we evaluated the relationship between serum levels of Activin A and skeletal muscle wasting in COPD patients. The expression levels of serum Activin A were measured in 78 stable COPD patients and in 60 healthy controls via ELISA, which was also used to determine the expression of circulating TNF-α levels. Total skeletal muscle mass (SMM) was calculated according to a validated formula by age and anthropometric measurements. The fat-free mass index (FFMI) was determined as the fat-free mass (FFM) corrected for body surface area. RESULTS Compared to the healthy controls, COPD patients had upregulated Activin A expression. The elevated levels of Activin A were correlated with TNF-α expression, while total SMM and FFMI were significantly decreased in COPD patients. Furthermore, serum Activin A expression in COPD patients was negatively associated with both FFMI and BMI. CONCLUSION The above results showed an association between increased circulating Activin A in COPD patients and the presence of muscle atrophy. Given our previous knowledge, we speculate that Activin A contributes to skeletal muscle wasting in COPD.
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Affiliation(s)
- Guanghui Zhou
- Department of Respiratory Medicine, Yixing People Hospital, Affiliated Jiangsu University, 214200, China
- Corresponding authors. E-mails: /
| | - Xianhua Gui
- Department of Respiratory Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, 210008, China
- Corresponding authors. E-mails: /
| | - Ruhua Chen
- Department of Respiratory Medicine, Yixing People Hospital, Affiliated Jiangsu University, 214200, China
- Corresponding authors. E-mails: /
| | - Xingli Fu
- Jiangsu University Health Science Center, Yizheng Road, Zhenjiang, Jiangsu, 212001, China
| | - Xiuhai Ji
- Department of Oncology, Affiliated Taicang Hospital of Traditional Chinese Medicine, Suzhou, 215400, China
- Corresponding authors. E-mails: /
| | - Hui Ding
- Department of Respiratory Medicine, Yixing People Hospital, Affiliated Jiangsu University, 214200, China
- Corresponding authors. E-mails: /
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Native and Polyubiquitinated Forms of Dihydroceramide Desaturase Are Differentially Linked to Human Embryonic Kidney Cell Survival. Mol Cell Biol 2018; 38:MCB.00222-18. [PMID: 30224516 DOI: 10.1128/mcb.00222-18] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 09/06/2018] [Indexed: 12/16/2022] Open
Abstract
There is controversy concerning the role of dihydroceramide desaturase (Degs1) in regulating cell survival, with studies showing that it can both promote and protect against apoptosis. We have therefore investigated the molecular basis for these opposing roles of Degs1. Treatment of HEK293T cells with the sphingosine kinase inhibitor SKi [2-(p-hydroxyanilino)-4-(p-chlorophenyl)thiazole] or fenretinide, but not the Degs1 inhibitor GT11 {N-[(1R,2S)-2-hydroxy-1-hydroxymethyl-2-(2-tridecyl-1-cyclopropenyl)ethyl]octan-amide}, induced the polyubiquitination of Degs1 (M r = 40 to 140 kDa) via a mechanism involving oxidative stress, p38 mitogen-activated protein kinase (MAPK), and Mdm2 (E3 ligase). The polyubiquitinated forms of Degs1 exhibit "gain of function" and activate prosurvival pathways, p38 MAPK, c-Jun N-terminal kinase (JNK), and X-box protein 1s (XBP-1s). In contrast, another sphingosine kinase inhibitor, ABC294640 [3-(4-chlorophenyl)-adamantane-1-carboxylic acid (pyridin-4-ylmethyl)amide], at concentrations of 25 to 50 μM failed to induce formation of the polyubiquitinated forms of Degs1. In contrast to SKi, ABC294640 (25 μM) promotes apoptosis of HEK293T cells via a Degs1-dependent mechanism that is associated with increased de novo synthesis of ceramide. These findings are the first to demonstrate that the polyubiquitination of Degs1 appears to change its function from proapoptotic to prosurvival. Thus, polyubiquitination of Degs1 might provide an explanation for the reported opposing functions of this enzyme in cell survival/apoptosis.
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Liu Z, Sin KWT, Ding H, Doan HA, Gao S, Miao H, Wei Y, Wang Y, Zhang G, Li YP. p38β MAPK mediates ULK1-dependent induction of autophagy in skeletal muscle of tumor-bearing mice. Cell Stress 2018; 2:311-324. [PMID: 31225455 PMCID: PMC6551802 DOI: 10.15698/cst2018.11.163] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Muscle wasting is the key manifestation of cancer-associated cachexia, a lethal metabolic disorder seen in over 50% of cancer patients. Autophagy is activated in cachectic muscle of cancer hosts along with the ubiquitin-proteasome pathway (UPP), contributing to accelerated protein degradation and muscle wasting. However, established signaling mechanism that activates autophagy in response to fasting or denervation does not seem to mediate cancer-provoked autophagy in skeletal myocytes. Here, we show that p38β MAPK mediates autophagy activation in cachectic muscle of tumor-bearing mice via novel mechanisms. Complementary genetic and pharmacological manipulations reveal that activation of p38β MAPK, but not p38α MAPK, is necessary and sufficient for Lewis lung carcinoma (LLC)-induced autophagy activation in skeletal muscle cells. Particularly, muscle-specific knockout of p38β MAPK abrogates LLC tumor-induced activation of autophagy and UPP, sparing tumor-bearing mice from muscle wasting. Mechanistically, p38β MAPK-mediated activation of transcription factor C/EBPβ is required for LLC-induced autophagy activation, and upregulation of autophagy-related genes LC3b and Gabarapl1. Surprisingly, ULK1 activation (phosphorylation at S555) by cancer requires p38β MAPK, rather than AMPK. Activated ULK1 forms a complex with p38β MAPK in myocytes, which is markedly increased by a tumor burden. Overexpression of a constitutively active p38Tbeta; MAPK in HEK293 cells increases phosphorylation at S555 and other amino acid residues of ULK1, but not several of AMPK-mediated sites. Finally, ULK1 activation is abrogated in tumor-bearing mice with muscle-specific knockout of p38β MAPK. Thus, p38β MAPK appears a key mediator of cancer-provoked autophagy activation, and a therapeutic target of cancer-induced muscle wasting.
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Affiliation(s)
- Zhelong Liu
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA.,Division of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ka Wai Thomas Sin
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Hui Ding
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA.,Department of Respiratory Medicine, Yixing Hospital affiliated to Jiangsu University, Yixing, China
| | - HoangAnh Amy Doan
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Song Gao
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Hongyu Miao
- School of Public Health, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Yahui Wei
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Yiman Wang
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Guohua Zhang
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
| | - Yi-Ping Li
- Department of Integrative Biology and Pharmacology, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030, USA
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133
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Brown JL, Lee DE, Rosa-Caldwell ME, Brown LA, Perry RA, Haynie WS, Huseman K, Sataranatarajan K, Van Remmen H, Washington TA, Wiggs MP, Greene NP. Protein imbalance in the development of skeletal muscle wasting in tumour-bearing mice. J Cachexia Sarcopenia Muscle 2018; 9:987-1002. [PMID: 30328290 PMCID: PMC6204589 DOI: 10.1002/jcsm.12354] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 08/28/2018] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Cancer cachexia occurs in approximately 80% of cancer patients and is a key contributor to cancer-related death. The mechanisms controlling development of tumour-induced muscle wasting are not fully elucidated. Specifically, the progression and development of cancer cachexia are underexplored. Therefore, we examined skeletal muscle protein turnover throughout the development of cancer cachexia in tumour-bearing mice. METHODS Lewis lung carcinoma (LLC) was injected into the hind flank of C57BL6/J mice at 8 weeks age with tumour allowed to develop for 1, 2, 3, or 4 weeks and compared with PBS injected control. Muscle size was measured by cross-sectional area analysis of haematoxylin and eosin stained tibialis anterior muscle. 2 H2 O was used to assess protein synthesis throughout the development of cancer cachexia. Immunoblot and RT-qPCR were used to measure regulators of protein turnover. TUNEL staining was utilized to measure apoptotic nuclei. LLC conditioned media (LCM) treatment of C2C12 myotubes was used to analyse cancer cachexia in vitro. RESULTS Muscle cross-sectional area decreased ~40% 4 weeks following tumour implantation. Myogenic signalling was suppressed in tumour-bearing mice as soon as 1 week following tumour implantation, including lower mRNA contents of Pax7, MyoD, CyclinD1, and Myogenin, when compared with control animals. AchRδ and AchRε mRNA contents were down-regulated by ~50% 3 weeks following tumour implantation. Mixed fractional synthesis rate protein synthesis was ~40% lower in 4 week tumour-bearing mice when compared with PBS controls. Protein ubiquitination was elevated by ~50% 4 weeks after tumour implantation. Moreover, there was an increase in autophagy machinery after 4 weeks of tumour growth. Finally, ERK and p38 MAPK phosphorylations were fourfold and threefold greater than control muscle 4 weeks following tumour implantation, respectively. Inhibition of p38 MAPK, but not ERK MAPK, in vitro partially rescued LCM-induced loss of myotube diameter. CONCLUSIONS Our findings work towards understanding the pathophysiological signalling in skeletal muscle in the initial development of cancer cachexia. Shortly following the onset of the tumour-bearing state alterations in myogenic regulatory factors are apparent, suggesting early onset alterations in the capacity for myogenic induction. Cancer cachexia presents with a combination of a loss of protein synthesis and increased markers of protein breakdown, specifically in the ubiquitin-proteasome system. Also, p38 MAPK may be a potential therapeutic target to combat cancer cachexia via a p38-FOX01-atrogene-ubiquitin-proteasome mechanism.
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Affiliation(s)
- Jacob L Brown
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
| | - David E Lee
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Megan E Rosa-Caldwell
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Lemuel A Brown
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA.,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Richard A Perry
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Wesley S Haynie
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Kendra Huseman
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 N.E. 13th Street, Oklahoma City, OK, 73104, USA
| | - Kavithalakshmi Sataranatarajan
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 N.E. 13th Street, Oklahoma City, OK, 73104, USA
| | - Holly Van Remmen
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 N.E. 13th Street, Oklahoma City, OK, 73104, USA.,Oklahoma City VA Medical Center, Oklahoma City, OK, USA
| | - Tyrone A Washington
- Exercise Muscle Biology Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Michael P Wiggs
- Integrated Physiology and Nutrition Laboratory, Department of Health and Kinesiology, University of Texas at Tyler, Tyler, TX, 75799, USA
| | - Nicholas P Greene
- Integrative Muscle Metabolism Laboratory, Exercise Science Research Center, Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA
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134
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Activin A induces leiomyoma cell proliferation, extracellular matrix (ECM) accumulation and myofibroblastic transformation of myometrial cells via p38 MAPK. Biochem Biophys Res Commun 2018; 504:447-453. [DOI: 10.1016/j.bbrc.2018.08.171] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 08/27/2018] [Indexed: 02/06/2023]
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135
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Yamada T, Himori K, Tatebayashi D, Yamada R, Ashida Y, Imai T, Akatsuka M, Masuda Y, Kanzaki K, Watanabe D, Wada M, Westerblad H, Lanner JT. Electrical Stimulation Prevents Preferential Skeletal Muscle Myosin Loss in Steroid-Denervation Rats. Front Physiol 2018; 9:1111. [PMID: 30147660 PMCID: PMC6097132 DOI: 10.3389/fphys.2018.01111] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 07/24/2018] [Indexed: 12/16/2022] Open
Abstract
Severe muscle weakness concomitant with preferential depletion of myosin has been observed in several pathological conditions. Here, we used the steroid-denervation (S-D) rat model, which shows dramatic decrease in myosin content and force production, to test whether electrical stimulation (ES) treatment can prevent these deleterious changes. S-D was induced by cutting the sciatic nerve and subsequent daily injection of dexamethasone for 7 days. For ES treatment, plantarflexor muscles were electrically stimulated to produce four sets of five isometric contractions each day. Plantarflexor in situ isometric torque, muscle weight, skinned muscle fiber force, and protein and mRNA expression were measured after the intervention period. ES treatment partly prevented the S-D-induced decreases in plantarflexor in situ isometric torque and muscle weight. ES treatment fully prevented S-D-induced decreases in skinned fiber force and ratio of myosin heavy chain (MyHC) to actin, as well as increases in the reactive oxygen/nitrogen species-generating enzymes NADPH oxidase (NOX) 2 and 4, phosphorylation of p38 MAPK, mRNA expression of the muscle-specific ubiquitin ligases muscle ring finger-1 (MuRF-1) and atrogin-1, and autolyzed active calpain-1. Thus, ES treatment is an effective way to prevent muscle impairments associated with loss of myosin.
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Affiliation(s)
- Takashi Yamada
- Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Koichi Himori
- Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Daisuke Tatebayashi
- Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Ryotaro Yamada
- Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Yuki Ashida
- Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Tomihiro Imai
- Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan
| | - Masayuki Akatsuka
- Department of Intensive Care Medicine, Sapporo Medical University, Sapporo, Japan
| | - Yoshiki Masuda
- Department of Intensive Care Medicine, Sapporo Medical University, Sapporo, Japan
| | - Keita Kanzaki
- Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, Kurashiki, Japan
| | - Daiki Watanabe
- School of Life Sciences, La Trobe University, Melbourne, VIC, Australia
| | - Masanobu Wada
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashihiroshima, Japan
| | - Håkan Westerblad
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Johanna T Lanner
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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136
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Le Dinh M, Carreira S, Obert J, Gayan-Ramirez G, Riou B, Beuvin M, Similowski T, Coirault C, Demoule A. Prolonged mechanical ventilation worsens sepsis-induced diaphragmatic dysfunction in the rat. PLoS One 2018; 13:e0200429. [PMID: 30067847 PMCID: PMC6070213 DOI: 10.1371/journal.pone.0200429] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 06/26/2018] [Indexed: 12/17/2022] Open
Abstract
Background Short-term mechanical ventilation (MV) protects against sepsis-induced diaphragmatic dysfunction. Prolonged MV induces diaphragmatic dysfunction in non-septic animals, but few reports describe the effects of prolonged MV in sepsis. We hypothesized that prolonged MV is not protective but worsens the diaphragmatic dysfunction induced by a mild sepsis, because MV and sepsis share key signaling mechanisms, such as cytokine upregulation. Method We studied the impact of prolonged MV (12 h) in four groups (n = 8) of male Wistar rats: 1) endotoxemia induced by intraperitoneal injection of Escherichia coli lipopolysaccharide, 2) MV without endotoxemia, 3) combination of endotoxemia and MV and 4) sham control. Diaphragm mechanical performance, pro-inflammatory cytokine concentrations (Tumor Necrosis Factor-α, Interleukin-1β, Interleukin-6) in plasma were measured. Results Prolonged MV and sepsis independtly reduced maximum diaphragm force (-27%, P = 0.003; -37%, P<0.001; respectively). MV and sepsis acted additively to further decrease diaphragm force (-62%, P<0.001). Similar results were observed for diaphragm kinetics (maximum lengthening velocity -47%, P<0.001). Sepsis and MV reduced diaphragm cross sectional area of type I and IIx fibers, which was further increased by the combination of sepsis and MV (all P<0.05). Sepsis and MV were individually associated with the presence of a robust perimysial inflammatory infiltrate, which was more marked when sepsis and MV were both present (all P<0.05). Sepsis and, to a lesser extent, MV increased proinflammatory cytokine production in plasma and diaphragm (all P<0.05); proinflammatory cytokine expression in plasma was increased further by the combination of sepsis and MV (all P<0.05). Maximum diaphragm force correlated negatively with plasma and diaphragmatic cytokine production (all p<0.05). Conclusions Prolonged (12 h) MV exacerbated sepsis-induced decrease in diaphragm performance. Systemic and diaphragmatic overproduction of pro-inflammatory cytokines may contribute to diaphragm weakness.
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Grants
- Alexandre Demoule reports personal fees from Maquet, grants, personal fees and non-financial support from Covidien, personal fees from MSD, grants and non-financial support from Philips, non-financial support from Drager, grants and personal fees from Resmed, personal fees from fisher & Paykel, all outside the submitted work. The funder provided support in the form of salaries for AD, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of this author is articulated in the ‘author contributions’ section.
- Chancellerie des Universités de Paris
- Institut Fédératif de Recherche 14-INSERM
- APHP
- Société de Réanimation de Langue Française (FR)
- CARDIF – L’Assistance Respiratoire
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Affiliation(s)
- Matthieu Le Dinh
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 1158, Paris, France
| | - Serge Carreira
- Department of Anesthesiology and Critical Care Groupe hospitalier Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 1166, IHU ICAN, Paris, France
| | - Julie Obert
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 974, Institut de Myologie, Paris, France
| | - Ghislaine Gayan-Ramirez
- Respiratory Muscle Research Unit, Laboratory of Pneumology and Respiratory Division, Katholieke Universiteit, Leuven, Belgium
| | - Bruno Riou
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 1166, IHU ICAN, Paris, France
- Department of Emergency Medicine and Surgery Groupe hospitalier Pitié-Salpêtrière, APHP, Paris, France
| | - Maud Beuvin
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 974, Institut de Myologie, Paris, France
| | - Thomas Similowski
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 1158, Paris, France
- Department of Pneumology and Medical Intensive Care Groupe hospitalier Pitié-Salpêtrière, APHP, Paris France
| | - Catherine Coirault
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 974, Institut de Myologie, Paris, France
| | - Alexandre Demoule
- Sorbonnes Universités UPMC Univ Paris 06, UMRS INSERM 1158, Paris, France
- Department of Pneumology and Medical Intensive Care Groupe hospitalier Pitié-Salpêtrière, APHP, Paris France
- * E-mail:
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137
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Yuasa K, Okubo K, Yoda M, Otsu K, Ishii Y, Nakamura M, Itoh Y, Horiuchi K. Targeted ablation of p38α MAPK suppresses denervation-induced muscle atrophy. Sci Rep 2018; 8:9037. [PMID: 29899565 PMCID: PMC5998077 DOI: 10.1038/s41598-018-26632-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 05/16/2018] [Indexed: 12/20/2022] Open
Abstract
The loss of skeletal muscle mass is a major cause of falls and fractures in the elderly, leading to compromised independence and a decrease in the quality of life. However, only a few therapeutic interventions leading to marginal clinical benefits in patients with this condition are currently available. Therefore, the demand to further understand the pathology of muscle atrophy and establish a treatment modality for patients with muscle atrophy is significant. p38α mitogen-activated protein kinase (p38α MAPK) is a ubiquitous signaling molecule that is implicated in various cellular functions, including cell proliferation, differentiation, and senescence. In the present study, we generated a mutant line in which p38α MAPK is specifically abrogated in muscle tissues. Compared with the control mice, these mutant mice are significantly resistant to denervation-induced muscle atrophy, suggesting that p38α MAPK positively regulates muscle atrophy. We also identified CAMK2B as a potential downstream target of p38α MAPK and found that the pharmacological inhibition of CAMK2B activity suppresses denervation-induced muscle atrophy. Altogether, our findings identify p38α MAPK as a novel regulator of muscle atrophy and suggest that the suppression of intracellular signaling mediated by p38α MAPK serves as a potential target for the treatment of muscle atrophy.
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Affiliation(s)
- Kazuki Yuasa
- Pharmacological R&D Section, Pharmaceutical Research Department, Sato Pharmaceutical Co., Ltd., 6-8-5 Higashi-ohi, Shinagawa, Tokyo, 140-0011, Japan
| | - Kazumasa Okubo
- Pharmacological R&D Section, Pharmaceutical Research Department, Sato Pharmaceutical Co., Ltd., 6-8-5 Higashi-ohi, Shinagawa, Tokyo, 140-0011, Japan
| | - Masaki Yoda
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku, Tokyo, 160-8582, Japan.,Laboratory of Cell and Tissue Biology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku, Tokyo, 160-8582, Japan
| | - Kinya Otsu
- The School of Cardiovascular Medicine and Sciences, King's College London, Strand, London, WC2R 2LS, UK
| | - Yasuyuki Ishii
- Pharmacological R&D Section, Pharmaceutical Research Department, Sato Pharmaceutical Co., Ltd., 6-8-5 Higashi-ohi, Shinagawa, Tokyo, 140-0011, Japan
| | - Masaya Nakamura
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku, Tokyo, 160-8582, Japan
| | - Yoshiki Itoh
- Drug Discovery Research Department, Sato Pharmaceutical Co., Ltd., 6-8-5 Higashi-ohi, Shinagawa, Tokyo, 140-0011, Japan.
| | - Keisuke Horiuchi
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku, Tokyo, 160-8582, Japan. .,Department of Orthopedic Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan.
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138
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Acute extracellular matrix, inflammatory and MAPK response to lengthening contractions in elderly human skeletal muscle. Exp Gerontol 2018; 106:28-38. [DOI: 10.1016/j.exger.2018.02.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/12/2018] [Accepted: 02/12/2018] [Indexed: 12/31/2022]
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139
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Kadoguchi T, Shimada K, Koide H, Miyazaki T, Shiozawa T, Takahashi S, Aikawa T, Ouchi S, Kitamura K, Sugita Y, Hamad AS, Kunimoto M, Sato-Okabayashi Y, Akita K, Isoda K, Daida H. Possible Role of NADPH Oxidase 4 in Angiotensin II-Induced Muscle Wasting in Mice. Front Physiol 2018; 9:340. [PMID: 29674975 PMCID: PMC5895660 DOI: 10.3389/fphys.2018.00340] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 03/20/2018] [Indexed: 12/25/2022] Open
Abstract
Background: Muscle wasting is a debilitating phenotype associated with chronic heart failure (CHF). We have previously demonstrated that angiotensin II (AII) directly induces muscle wasting in mice through the activation of NADPH oxidase (Nox). In this study, we tested the hypothesis that deficiency of NADPH oxidase 4 (Nox4), a major source of oxidative stress, ameliorates AII-induced muscle wasting through the regulation of redox balance. Methods and Results: Nox4 knockout (KO) and wild-type (WT) mice were used. At baseline, there were no differences in physical characteristics between the WT and KO mice. Saline (vehicle, V) or AII was infused via osmotic minipumps for 4 weeks, after which, the WT + AII mice showed significant increases in Nox activity and NOX4 protein compared with the WT + V mice, as well as decreases in body weight, gastrocnemius muscle weight, and myocyte cross-sectional area. These changes were significantly attenuated in the KO + AII mice (27 ± 1 vs. 31 ± 1 g, 385 ± 3 vs. 438 ± 13 mg, and 1,330 ± 30 vs. 2281 ± 150 μm2, respectively, all P < 0.05). The expression levels of phospho-Akt decreased, whereas those of muscle RING Finger-1 (MuRF-1) and MAFbx/atrogin-1 significantly increased in the WT + AII mice compared with the WT + V mice. Furthermore, nuclear factor erythroid-derived 2-like 2 (Nrf2) and the expression levels of Nrf2-regulated genes significantly decreased in the WT + AII mice compared with the WT + V mice. These changes were significantly attenuated in the KO + AII mice (P < 0.05). Conclusion: Nox4 deficiency attenuated AII-induced muscle wasting, partially through the regulation of Nrf2. The Nox4-Nrf2 axis may play an important role in the development of AII-induced muscle wasting.
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Affiliation(s)
- Tomoyasu Kadoguchi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Kazunori Shimada
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Hiroshi Koide
- Laboratory of Molecular and Biochemical Research (Kyodo-ken), Research Support Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Tetsuro Miyazaki
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Tomoyuki Shiozawa
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Shuhei Takahashi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Tatsuro Aikawa
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Shohei Ouchi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Kenichi Kitamura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Yurina Sugita
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Al Shahi Hamad
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Mitsuhiro Kunimoto
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Yayoi Sato-Okabayashi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Koji Akita
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Kikuo Isoda
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Hiroyuki Daida
- Department of Cardiovascular Medicine, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo, Japan
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140
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Grosicki GJ, Fielding RA, Lustgarten MS. Gut Microbiota Contribute to Age-Related Changes in Skeletal Muscle Size, Composition, and Function: Biological Basis for a Gut-Muscle Axis. Calcif Tissue Int 2018; 102:433-442. [PMID: 29058056 PMCID: PMC5858871 DOI: 10.1007/s00223-017-0345-5] [Citation(s) in RCA: 186] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 10/13/2017] [Indexed: 12/12/2022]
Abstract
Skeletal muscle is a highly plastic tissue that plays a central role in human health and disease. Aging is associated with a decrease in muscle mass and function (sarcopenia) that is associated with a loss of independence and reduced quality of life. Gut microbiota, the bacteria, archaea, viruses, and eukaryotic microbes residing in the gastrointestinal tract are emerging as a potential contributor to age-associated muscle decline. Specifically, advancing age is characterized by a dysbiosis of gut microbiota that is associated with increased intestinal permeability, facilitating the passage of endotoxin and other microbial products (e.g., indoxyl sulfate) into the circulation. Upon entering the circulation, LPS and other microbial factors promote inflammatory signaling and skeletal muscle changes that are hallmarks of the aging muscle phenotype. This review will summarize existing literature suggesting cross-talk between gut microbiota and skeletal muscle health, with emphasis on the significance of this axis for mediating changes in aging skeletal muscle size, composition, and function.
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Affiliation(s)
- Gregory J Grosicki
- Nutrition, Exercise Physiology, and Sarcopenia Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
| | - Roger A Fielding
- Nutrition, Exercise Physiology, and Sarcopenia Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
| | - Michael S Lustgarten
- Nutrition, Exercise Physiology, and Sarcopenia Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA.
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141
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S-allyl cysteine inhibits TNFα-induced skeletal muscle wasting through suppressing proteolysis and expression of inflammatory molecules. Biochim Biophys Acta Gen Subj 2018; 1862:895-906. [DOI: 10.1016/j.bbagen.2017.12.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 12/15/2017] [Accepted: 12/26/2017] [Indexed: 12/20/2022]
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142
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Collins KH, Hart DA, Smith IC, Issler AM, Reimer RA, Seerattan RA, Rios JL, Herzog W. Acute and chronic changes in rat soleus muscle after high-fat high-sucrose diet. Physiol Rep 2018; 5:e13270. [PMID: 28533262 PMCID: PMC5449557 DOI: 10.14814/phy2.13270] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 04/04/2017] [Indexed: 12/13/2022] Open
Abstract
The effects of obesity on different musculoskeletal tissues are not well understood. The glycolytic quadriceps muscles are compromised with obesity, but due to its high oxidative capacity, the soleus muscle may be protected against obesity‐induced muscle damage. To determine the time–course relationship between a high‐fat/high‐sucrose (HFS) metabolic challenge and soleus muscle integrity, defined as intramuscular fat invasion, fibrosis and molecular alterations over six time points. Male Sprague‐Dawley rats were fed a HFS diet (n = 64) and killed at serial short‐term (3 days, 1 week, 2 weeks, 4 weeks) and long‐term (12 weeks, 28 weeks) time points. Chow‐fed controls (n = 21) were killed at 4, 12, and 28 weeks. At sacrifice, animals were weighed, body composition was calculated (DXA), and soleus muscles were harvested and flash‐frozen. Cytokine and adipokine mRNA levels for soleus muscles were assessed, using RT‐qPCR. Histological assessment of muscle fibrosis and intramuscular fat was conducted, CD68+ cell number was determined using immunohistochemistry, and fiber typing was assessed using myosin heavy chain protein analysis. HFS animals demonstrated significant increases in body fat by 1 week, and this increase in body fat was sustained through 28 weeks on the HFS diet. Short‐term time‐point soleus muscles demonstrated up‐regulated mRNA levels for inflammation, atrophy, and oxidative stress molecules. However, intramuscular fat, fibrosis, and CD68+ cell number were similar to their respective control group at all time points evaluated. Therefore, the oxidative capacity of the soleus may be protective against diet‐induced alterations to muscle integrity. Increasing oxidative capacity of muscles using aerobic exercise may be a beneficial strategy for mitigating obesity‐induced muscle damage, and its consequences.
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Affiliation(s)
- Kelsey H Collins
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada.,McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada
| | - David A Hart
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada.,McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada.,The Centre for Hip Health & Mobility, Department of Family Practice, University of British Columbia, Vancouver, British Columbia, Canada.,Alberta Health Services Bone & Joint Health Strategic Clinical Network, Calgary, Alberta, Canada
| | - Ian C Smith
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada
| | - Anthony M Issler
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada.,Department of Mechanical Engineering, University of Calgary, Calgary, Alberta, Canada
| | - Raylene A Reimer
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada.,Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
| | - Ruth A Seerattan
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada
| | - Jaqueline L Rios
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada.,McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada.,CAPES Foundation, Brasilia, Brazil
| | - Walter Herzog
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada.,McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada
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143
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Capel F, Geloen A, Vaysse C, Pineau G, Demaison L, Chardigny JM, Michalski MC, Malpuech-Brugère C. Rapeseed oil fortified with micronutrients can reduce glucose intolerance during a high fat challenge in rats. Nutr Metab (Lond) 2018; 15:22. [PMID: 29568317 PMCID: PMC5859643 DOI: 10.1186/s12986-018-0259-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 03/12/2018] [Indexed: 12/13/2022] Open
Abstract
Background Better choices of dietary lipid sources and substitution of refined by fortified oils could reduce the intake of saturated fatty acids (FA) and increase the intake of omega 3 FA concomitantly to healthy bioactive compounds. Methods The development of obesity and metabolic disturbances was explored in rats fed during 11 weeks with a high fat diet (HFD) in which the amount of saturated and polyunsaturated FA was respectively reduced and increased, using rapeseed oil as lipid source. This oil was used in a refined form (R) or fortified (10 fold increase in concentration) with endogenous micronutrients (coenzyme Q10 + tocopherol only (RF) only and also with canolol (RFC)). The effect of substituting palm by rapeseed oil was analysed using a student t test, oil fortification was analysed using ANOVA statistical test. Results Despite a similar weight gain, diets R, RF and RFC improved glucose tolerance (+ 10%) of the rats compared to a standard HFD with palm and sunflower oils as lipid source. Plasma glucose was lowered in RF and RFC groups (- 15 and 23% respectively), although triacylglycerol level was only reduced in group RFC (- 33%) compared to R. The fortification with canolol promoted the activation of Akt and AMP-activated protein kinase (AMPK) in skeletal muscle and subcutaneous adipose tissue respectively. Canolol supplementation also led to reduce p38 MAPK activation in skeletal muscle. Conclusions This study suggests that the presence of endogenous micronutrients in rapeseed oil promotes cellular adaptations to reverse glucose intolerance and improve the metabolism of insulin sensitive tissues.
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Affiliation(s)
- Frederic Capel
- 1INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, Université Clermont Auvergne, 58 rue Montalembert - BP 321, F-63000 Clermont-Ferrand, France
| | - Alain Geloen
- 2Laboratoire CarMeN, INRA UMR1397, INSERM U1060, Univ-Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, IMBL, F-69621 Villeurbanne, France
| | - Carole Vaysse
- 3ITERG-ENMS, Université de Bordeaux, rue Léo Saignat, 33076 Bordeaux Cedex, France
| | - Gaelle Pineau
- 2Laboratoire CarMeN, INRA UMR1397, INSERM U1060, Univ-Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, IMBL, F-69621 Villeurbanne, France
| | - Luc Demaison
- 1INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, Université Clermont Auvergne, 58 rue Montalembert - BP 321, F-63000 Clermont-Ferrand, France
| | - Jean-Michel Chardigny
- 1INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, Université Clermont Auvergne, 58 rue Montalembert - BP 321, F-63000 Clermont-Ferrand, France.,Present address : Centre de Recherche INRA Bourgogne Franche Comté Bâtiment Le Magnen, 17 rue Sully BP 86510, 21065 DIJON Cedex, France
| | - Marie-Caroline Michalski
- 2Laboratoire CarMeN, INRA UMR1397, INSERM U1060, Univ-Lyon, Université Claude Bernard Lyon 1, INSA-Lyon, IMBL, F-69621 Villeurbanne, France
| | - Corinne Malpuech-Brugère
- 1INRA, UNH, Unité de Nutrition Humaine, CRNH Auvergne, Université Clermont Auvergne, 58 rue Montalembert - BP 321, F-63000 Clermont-Ferrand, France
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144
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Perandini LA, Chimin P, Lutkemeyer DDS, Câmara NOS. Chronic inflammation in skeletal muscle impairs satellite cells function during regeneration: can physical exercise restore the satellite cell niche? FEBS J 2018; 285:1973-1984. [PMID: 29473995 DOI: 10.1111/febs.14417] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/27/2018] [Accepted: 02/19/2018] [Indexed: 12/23/2022]
Abstract
Chronic inflammation impairs skeletal muscle regeneration. Although many cells are involved in chronic inflammation, macrophages seem to play an important role in impaired muscle regeneration since these cells are associated with skeletal muscle stem cell (namely, satellite cells) activation and fibro-adipogenic progenitor cell (FAP) survival. Specifically, an imbalance of M1 and M2 macrophages seems to lead to impaired satellite cell activation, and these are the main cells that function during skeletal muscle regeneration, after muscle damage. Additionally, this imbalance leads to the accumulation of FAPs in skeletal muscle, with aberrant production of pro-fibrotic factors (e.g., extracellular matrix components), impairing the niche for proper satellite cell activation and differentiation. Treatments aiming to block the inflammatory pro-fibrotic response are partially effective due to their side effects. Therefore, strategies reverting chronic inflammation into a pro-regenerative pattern are required. In this review, we first describe skeletal muscle resident macrophage ontogeny and homeostasis, and explain how macrophages are replenished after muscle injury. We next discuss the potential role of chronic physical activity and exercise in restoring the M1 and M2 macrophage balance and consequently, the satellite cell niche to improve skeletal muscle regeneration after injury.
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Affiliation(s)
- Luiz Augusto Perandini
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | - Patricia Chimin
- Department of Physical Education, Physical Education and Sports Center, Londrina State University, Brazil
| | - Diego da Silva Lutkemeyer
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | - Niels Olsen Saraiva Câmara
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil.,Laboratory of Clinical and Experimental Immunology, Division of Nephrology, Department of Medicine, Federal University of Sao Paulo, Brazil
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145
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Sawicka AK, Hartmane D, Lipinska P, Wojtowicz E, Lysiak-Szydlowska W, Olek RA. l-Carnitine Supplementation in Older Women. A Pilot Study on Aging Skeletal Muscle Mass and Function. Nutrients 2018; 10:nu10020255. [PMID: 29473908 PMCID: PMC5852831 DOI: 10.3390/nu10020255] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 02/02/2018] [Accepted: 02/17/2018] [Indexed: 12/21/2022] Open
Abstract
Skeletal muscle wasting, associated with aging, may be regulated by the inflammatory cytokines as well as by insulin-like growth factor 1 (IGF-1). l-carnitine possesses anti-inflammatory properties and increases plasma IGF-1 concentration, leading to the regulation of the genes responsible for protein catabolism and anabolism. The purpose of the present study was to evaluate the effect of a 24-week l-carnitine supplementation on serum inflammatory markers, IGF-1, body composition and skeletal muscle strength in healthy human subjects over 65 years of age. Women between 65 and 70 years of age were supplemented for 24 weeks with either 1500 mg l-carnitine-l-tartrate or an isonitrogenous placebo per day in a double-blind fashion. Before and after the supplementation protocol, body mass and composition, as well as knee extensor and flexor muscle strength were determined. In the blood samples, free carnitine, interleukin-6, tumor necrosis factor-α, C-reactive protein and IGF-1 were determined. A marked increase in free plasma carnitine concentration was observed due to l-carnitine supplementation. No substantial changes in other parameters were noted. In the current study, supplementation for 24 weeks affected neither the skeletal muscle strength nor circulating markers in healthy women over 65 years of age. Positive and negative aspects of l-carnitine supplementation need to be clarified.
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Affiliation(s)
- Angelika K Sawicka
- Department of Bioenergetics and Nutrition, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland.
| | - Dace Hartmane
- Latvian Institute of Organic Synthesis, LV-1006 Riga, Latvia.
| | - Patrycja Lipinska
- Institute of Physical Culture, Kazimierz Wielki University, 85-091 Bydgoszcz, Poland.
| | - Ewa Wojtowicz
- Department of Anatomy and Anthropology, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland.
| | | | - Robert A Olek
- Department of Bioenergetics and Nutrition, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland.
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146
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Seaborne RA, Strauss J, Cocks M, Shepherd S, O'Brien TD, van Someren KA, Bell PG, Murgatroyd C, Morton JP, Stewart CE, Sharples AP. Human Skeletal Muscle Possesses an Epigenetic Memory of Hypertrophy. Sci Rep 2018; 8:1898. [PMID: 29382913 PMCID: PMC5789890 DOI: 10.1038/s41598-018-20287-3] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/16/2018] [Indexed: 12/25/2022] Open
Abstract
It is unknown if adult human skeletal muscle has an epigenetic memory of earlier encounters with growth. We report, for the first time in humans, genome-wide DNA methylation (850,000 CpGs) and gene expression analysis after muscle hypertrophy (loading), return of muscle mass to baseline (unloading), followed by later hypertrophy (reloading). We discovered increased frequency of hypomethylation across the genome after reloading (18,816 CpGs) versus earlier loading (9,153 CpG sites). We also identified AXIN1, GRIK2, CAMK4, TRAF1 as hypomethylated genes with enhanced expression after loading that maintained their hypomethylated status even during unloading where muscle mass returned to control levels, indicating a memory of these genes methylation signatures following earlier hypertrophy. Further, UBR5, RPL35a, HEG1, PLA2G16, SETD3 displayed hypomethylation and enhanced gene expression following loading, and demonstrated the largest increases in hypomethylation, gene expression and muscle mass after later reloading, indicating an epigenetic memory in these genes. Finally, genes; GRIK2, TRAF1, BICC1, STAG1 were epigenetically sensitive to acute exercise demonstrating hypomethylation after a single bout of resistance exercise that was maintained 22 weeks later with the largest increase in gene expression and muscle mass after reloading. Overall, we identify an important epigenetic role for a number of largely unstudied genes in muscle hypertrophy/memory.
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Affiliation(s)
- Robert A Seaborne
- Institute for Science and Technology in Medicine (ISTM), School of Medicine, Keele University, Staffordshire, United Kingdom.,Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Juliette Strauss
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Matthew Cocks
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Sam Shepherd
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Thomas D O'Brien
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Ken A van Someren
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle upon Tyne, United Kingdom
| | - Phillip G Bell
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle upon Tyne, United Kingdom
| | - Christopher Murgatroyd
- School of Healthcare Science, Manchester Metropolitan University, Manchester, United Kingdom
| | - James P Morton
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Claire E Stewart
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Adam P Sharples
- Institute for Science and Technology in Medicine (ISTM), School of Medicine, Keele University, Staffordshire, United Kingdom. .,Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom.
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147
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Deletion of NAD(P)H Oxidase 2 Prevents Angiotensin II-Induced Skeletal Muscle Atrophy. BIOMED RESEARCH INTERNATIONAL 2018; 2018:3194917. [PMID: 29487866 PMCID: PMC5816890 DOI: 10.1155/2018/3194917] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/01/2017] [Accepted: 12/12/2017] [Indexed: 12/20/2022]
Abstract
Skeletal muscle atrophy is induced by an imbalance between protein synthesis and degradation. Our previous studies reported that angiotensin II (AII) directly induced muscle atrophy in mice. This study investigated the role of NAD(P)H oxidase 2 (Nox2) activation by AII in the induction of skeletal muscle atrophy. For 4 weeks, either saline (vehicle: V) or AII (1000 ng kg−1 min−1) was infused into male wild-type (WT) and Nox2 knockout (KO) mice via osmotic minipumps. Experiments were performed in the following 4 groups: WT + V, KO + V, WT + AII, and KO + AII. Body weight, muscle weight, and myocyte cross-sectional area were significantly decreased in WT + AII compared to WT + V mice, and these changes were not observed in KO + AII mice. Akt phosphorylation of Ser473 and p70S6K of Thr389 was decreased, gene expression levels of MuRF-1 and atrogin-1 were increased in WT + AII compared to WT + V, and these changes were significantly attenuated in KO + AII mice. The deletion of Nox2 prevented AII-induced skeletal muscle atrophy via improving the balance between protein synthesis and degradation. Therefore, Nox2 may be a therapeutic target for AII-induced skeletal muscle atrophy.
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148
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Ábrigo J, Elorza AA, Riedel CA, Vilos C, Simon F, Cabrera D, Estrada L, Cabello-Verrugio C. Role of Oxidative Stress as Key Regulator of Muscle Wasting during Cachexia. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:2063179. [PMID: 29785242 PMCID: PMC5896211 DOI: 10.1155/2018/2063179] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 02/07/2018] [Indexed: 12/11/2022]
Abstract
Skeletal muscle atrophy is a pathological condition mainly characterized by a loss of muscular mass and the contractile capacity of the skeletal muscle as a consequence of muscular weakness and decreased force generation. Cachexia is defined as a pathological condition secondary to illness characterized by the progressive loss of muscle mass with or without loss of fat mass and with concomitant diminution of muscle strength. The molecular mechanisms involved in cachexia include oxidative stress, protein synthesis/degradation imbalance, autophagy deregulation, increased myonuclear apoptosis, and mitochondrial dysfunction. Oxidative stress is one of the most common mechanisms of cachexia caused by different factors. It results in increased ROS levels, increased oxidation-dependent protein modification, and decreased antioxidant system functions. In this review, we will describe the importance of oxidative stress in skeletal muscles, its sources, and how it can regulate protein synthesis/degradation imbalance, autophagy deregulation, increased myonuclear apoptosis, and mitochondrial dysfunction involved in cachexia.
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Affiliation(s)
- Johanna Ábrigo
- 1Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
- 2Millennium Institute of Immunology and Immunotherapy, Santiago, Chile
| | - Alvaro A. Elorza
- 2Millennium Institute of Immunology and Immunotherapy, Santiago, Chile
- 3Centro de Investigaciones Biomédicas, Facultad de Ciencias Biológicas & Facultad de Medicina, Universidad Andres Bello, Santiago, Chile
| | - Claudia A. Riedel
- 1Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
- 2Millennium Institute of Immunology and Immunotherapy, Santiago, Chile
| | - Cristian Vilos
- 4Laboratory of Nanomedicine and Targeted Delivery, Center for Integrative Medicine and Innovative Science, Faculty of Medicine, and Center for Bioinformatics and Integrative Biology, Faculty of Biological Sciences, Universidad Andres Bello, Santiago, Chile
- 5Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Universidad de Santiago de Chile, Santiago, Chile
| | - Felipe Simon
- 1Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
- 2Millennium Institute of Immunology and Immunotherapy, Santiago, Chile
| | - Daniel Cabrera
- 6Departamento de Gastroenterología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- 7Departamento de Ciencias Químicas y Biológicas, Facultad de Salud, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Lisbell Estrada
- 8Centro Integrativo de Biología y Química Aplicada, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Claudio Cabello-Verrugio
- 1Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
- 2Millennium Institute of Immunology and Immunotherapy, Santiago, Chile
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149
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Abstract
Pulmonary arterial hypertension (PAH) is characterized by a continuous increase in pre-capillary pulmonary vascular resistance (PVR) with a progressive reduction of cardiac output (CO). Similar to what occurs in left heart failure (HF), this represents the initial phase of a syndrome characterized by the progressive development of dyspnea and fatigue with increasing deterioration of exercise tolerance. Although the therapies introduced in the last two decades have determined a significant improvement of the clinical conditions of PAH patients, they have a little impact on exercise capacity and prognosis. However, as previously demonstrated for HF, recent pilot studies have reported that physical and respiratory rehabilitation may have a specific role in the management of PAH. Despite potential risks, so far all studies agree that exercise training (ET) improves exercise capacity, quality of life (QoL), muscle function and pulmonary circulation. We will review the pathophysiological mechanisms underlying the functional incompetence of PAH patients, the effects of ET on clinical and functional parameters, the selection criteria for inclusion of patients in a training program, the suggested monitoring of beneficial effects or possible side effects induced by ET. Finally, we discuss of the possible exercise induced amelioration of prognosis in PAH.
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Affiliation(s)
| | - Maurizio Bussotti
- Department of Cardiology, Istituti Clinici Scientifici Maugeri SpA SB, Istituto di Milano-IRCCS, Milan, Italy
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150
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Miao C, Lv Y, Zhang W, Chai X, Feng L, Fang Y, Liu X, Zhang X. Pyrrolidine Dithiocarbamate (PDTC) Attenuates Cancer Cachexia by Affecting Muscle Atrophy and Fat Lipolysis. Front Pharmacol 2017; 8:915. [PMID: 29311924 PMCID: PMC5733020 DOI: 10.3389/fphar.2017.00915] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 11/30/2017] [Indexed: 12/18/2022] Open
Abstract
Cancer cachexia is a kind of whole body metabolic disorder syndrome accompanied with severe wasting of muscle and adipose tissue. NF-κB signaling plays an important role during skeletal muscle atrophy and fat lipolysis. As an inhibitor of NF-κB signaling, Pyrrolidine dithiocarbamate (PDTC) was reported to relieve cancer cachexia; however, its mechanism remains largely unknown. In our study, we showed that PDTC attenuated cancer cachexia symptom in C26 tumor bearing mice models in vivo without influencing tumor volume. What’s more, PDTC inhibited muscle atrophy and lipolysis in cells models in vitro induced by TNFα and C26 tumor medium. PDTC suppressed atrophy of myotubes differentiated from C2C12 by reducing MyoD and upregulating MuRF1, and preserving the expression of perilipin as well as blocking the activation of HSL in 3T3-L1 mature adipocytes. Meaningfully, we observed that PDTC also inhibited p38 MAPK signaling besides the NF-κB signaling in cancer cachexia in vitro models. In addition, PDTC also influenced the protein synthesis of skeletal muscle by activating AKT signaling and regulated fat energy metabolism by inhibiting AMPK signaling. Therefore, PDTC primarily influenced different pathways in different tissues. The study not only established a simple and reliable screening drugs model of cancer cachexia in vitro but also provided new theoretical basis for future treatment of cancer cachexia.
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Affiliation(s)
- Chunxiao Miao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Yuanyuan Lv
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Wanli Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Xiaoping Chai
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Lixing Feng
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China.,Institute of Interdisciplinary Integrative Biomedical Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yanfen Fang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China.,Division of Anti-tumor Pharmacology, Shanghai Institute of Materia Medica (CAS), Chinese Academy of Sciences, Shanghai, China
| | - Xuan Liu
- Institute of Interdisciplinary Integrative Biomedical Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiongwen Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
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