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Hahm JH, Nirmala FS, Ha TY, Ahn J. Nutritional approaches targeting mitochondria for the prevention of sarcopenia. Nutr Rev 2024; 82:676-694. [PMID: 37475189 DOI: 10.1093/nutrit/nuad084] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023] Open
Abstract
A decline in function and loss of mass, a condition known as sarcopenia, is observed in the skeletal muscles with aging. Sarcopenia has a negative effect on the quality of life of elderly. Individuals with sarcopenia are at particular risk for adverse outcomes, such as reduced mobility, fall-related injuries, and type 2 diabetes mellitus. Although the pathogenesis of sarcopenia is multifaceted, mitochondrial dysfunction is regarded as a major contributor for muscle aging. Hence, the development of preventive and therapeutic strategies to improve mitochondrial function during aging is imperative for sarcopenia treatment. However, effective and specific drugs that can be used for the treatment are not yet approved. Instead studies on the relationship between food intake and muscle aging have suggested that nutritional intake or dietary control could be an alternative approach for the amelioration of muscle aging. This narrative review approaches various nutritional components and diets as a treatment for sarcopenia by modulating mitochondrial homeostasis and improving mitochondria. Age-related changes in mitochondrial function and the molecular mechanisms that help improve mitochondrial homeostasis are discussed, and the nutritional components and diet that modulate these molecular mechanisms are addressed.
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Affiliation(s)
- Jeong-Hoon Hahm
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
| | - Farida S Nirmala
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon-si, South Korea
| | - Tae Youl Ha
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon-si, South Korea
| | - Jiyun Ahn
- Research Group of Aging and Metabolism, Korea Food Research Institute, Wanju-gun, South Korea
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon-si, South Korea
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Du J, Yun H, Wang H, Bai X, Su Y, Ge X, Wang Y, Gu B, Zhao L, Yu JG, Song Y. Proteomic Profiling of Muscular Adaptations to Short-Term Concentric Versus Eccentric Exercise Training in Humans. Mol Cell Proteomics 2024; 23:100748. [PMID: 38493954 PMCID: PMC11017286 DOI: 10.1016/j.mcpro.2024.100748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 02/16/2024] [Accepted: 03/13/2024] [Indexed: 03/19/2024] Open
Abstract
The molecular mechanisms underlying muscular adaptations to concentric (CON) and eccentric (ECC) exercise training have been extensively explored. However, most previous studies have focused on specifically selected proteins, thus, unable to provide a comprehensive protein profile and potentially missing the crucial mechanisms underlying muscular adaptation to exercise training. We herein aimed to investigate proteomic profiles of human skeletal muscle in response to short-term resistance training. Twenty young males were randomly and evenly assigned to two groups to complete a 4-week either ECC or CON training program. Measurements of body composition and physiological function of the quadriceps femoris were conducted both before and after the training. Muscle biopsies from the vastus lateralis of randomly selected participants (five in ECC and four in CON) of both before and after the training were analyzed using the liquid-chromatography tandem mass spectrometry in combination with bioinformatics analysis. Neither group presented a significant difference in body composition or leg muscle mass; however, muscle peak torque, total work, and maximal voluntary contraction were significantly increased after the training in both groups. Proteomics analysis revealed 122 differentially abundant proteins (DAPs; p value < 0.05 & fold change >1.5 or <0.67) in ECC, of which the increased DAPs were mainly related to skeletal muscle contraction and cytoskeleton and enriched specifically in the pentose phosphate pathway, extracellular matrix-receptor interaction, and PI3K-Akt signaling pathway, whereas the decreased DAPs were associated with the mitochondrial respiratory chain. One hundred one DAPs were identified in CON, of which the increased DAPs were primarily involved in translation/protein synthesis and the mitochondria respiratory, whereas the decreased DAPs were related to metabolic processes, cytoskeleton, and de-ubiquitination. In conclusion, the 4-week CON and ECC training resulted in distinctly different proteomic profiles, especially in proteins related to muscular structure and metabolism.
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Affiliation(s)
- Jiawei Du
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Department of Exercise Physiology, Beijing Sport University, Beijing, China
| | - Hezhang Yun
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Department of Exercise Physiology, Beijing Sport University, Beijing, China
| | - Hongsheng Wang
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Department of Exercise Physiology, Beijing Sport University, Beijing, China
| | - Xin Bai
- Beijing Sports University Community Health Service Center, Beijing Sport University, Beijing, China
| | - Yuhui Su
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Department of Exercise Physiology, Beijing Sport University, Beijing, China
| | - Xiaochuan Ge
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Department of Exercise Physiology, Beijing Sport University, Beijing, China
| | - Yang Wang
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Institute of Sports and Health, Beijing Sport University, Beijing, China
| | - Boya Gu
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Institute of Sports and Health, Beijing Sport University, Beijing, China
| | - Li Zhao
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Department of Exercise Physiology, Beijing Sport University, Beijing, China
| | - Ji-Guo Yu
- Sports Medicine Unit, Department of Community Medicine and Rehabilitation, Umea University, Umeå, Sweden.
| | - Yafeng Song
- Key Laboratory of Sports and Physical Fitness of the Ministry of Education, Beijing Sport University, Beijing, China; Institute of Sports and Health, Beijing Sport University, Beijing, China; Academy of Plateau Science and Sustainability, Qinghai Normal University, Xining, China.
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Yi D, Sugimoto T, Matsumura T, Yokoyama S, Fujisato T, Nakamura T, Hashimoto T. Investigating the Combined Effects of Mechanical Stress and Nutrition on Muscle Hypertrophic Signals Using Contractile 3D-Engineered Muscle (3D-EM). Nutrients 2023; 15:4083. [PMID: 37764867 PMCID: PMC10536268 DOI: 10.3390/nu15184083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/17/2023] [Accepted: 09/19/2023] [Indexed: 09/29/2023] Open
Abstract
Since 3D-EM closely resembles in vivo muscles, the aim of this study was to investigate the effects of exercise (electrical pulse stimulation (EPS)) and nutrition (maca), which contains triterpenes, on muscle hypertrophy by using 3D-EM for the first time. The 3D-EM was composed of C2C12 cells and type 1 collagen gel, was differentiated for 14 days, and was divided into four groups: control, maca, EPS, and maca + EPS. The medium was replaced every two days before each EPS intervention, and the concentration of maca in the culture solution was 1 mg/mL. The intervention conditions of the EPS were 30 V, 1 Hz, and 2 ms (24 h on, 24 h off, for one week). The expression levels of proteins were examined by Western blotting. The intervention of maca and EPS upregulated the expression of MHC-fast/slow (both p < 0.05) compared with the control group, and the addition of maca had no effect on the phosphorylation of mTOR (p = 0.287) but increased the AMPK phosphorylation (p = 0.001). These findings suggest that intervention with maca and EPS has a positive effect on muscle hypertrophy, which has a positive impact on sarcopenia. However, the underlying mechanisms remain to be further explored.
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Affiliation(s)
- Dong Yi
- Faculty of Sport and Health Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu 525-8577, Shiga, Japan; (D.Y.); (T.S.); (T.M.)
| | - Takeshi Sugimoto
- Faculty of Sport and Health Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu 525-8577, Shiga, Japan; (D.Y.); (T.S.); (T.M.)
| | - Teppei Matsumura
- Faculty of Sport and Health Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu 525-8577, Shiga, Japan; (D.Y.); (T.S.); (T.M.)
| | - Sho Yokoyama
- Department of Mechanical Engineering, School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Osaka 535-8585, Osaka, Japan;
| | - Toshia Fujisato
- Graduate Course in Applied Chemistry, Environmental and Biomedical Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Osaka 535-8585, Osaka, Japan;
| | - Tomohiro Nakamura
- Division of Human Sciences, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Osaka 535-8585, Osaka, Japan;
| | - Takeshi Hashimoto
- Faculty of Sport and Health Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu 525-8577, Shiga, Japan; (D.Y.); (T.S.); (T.M.)
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Calvani R, Picca A, Coelho-Júnior HJ, Tosato M, Marzetti E, Landi F. "Diet for the prevention and management of sarcopenia". Metabolism 2023:155637. [PMID: 37352971 DOI: 10.1016/j.metabol.2023.155637] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 06/25/2023]
Abstract
Sarcopenia is a geriatric condition characterized by a progressive loss of skeletal muscle mass and strength, with an increased risk of adverse health outcomes (e.g., falls, disability, institutionalization, reduced quality of life, mortality). Pharmacological remedies are currently unavailable for preventing the development of sarcopenia, halting its progression, or impeding its negative health outcomes. The most effective strategies to contrast sarcopenia rely on the adoption of healthier lifestyle behaviors, including adherence to high-quality diets and regular physical activity. In this review, the role of nutrition in the prevention and management of sarcopenia is summarized. Special attention is given to current "blockbuster" dietary regimes and agents used to counteract age-related muscle wasting, together with their putative mechanisms of action. Issues related to the design and implementation of effective nutritional strategies are discussed, with a focus on unanswered questions on the most appropriate timing of nutritional interventions to preserve muscle health and function into old age. A brief description is also provided on new technologies that can facilitate the development and implementation of personalized nutrition plans to contrast sarcopenia.
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Affiliation(s)
- Riccardo Calvani
- Department of Geriatrics, Orthopedics and Rheumatology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, 00168 Rome, Italy.
| | - Anna Picca
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, 00168 Rome, Italy; Department of Medicine and Surgery, LUM University, 70100 Casamassima, Italy.
| | - Hélio José Coelho-Júnior
- Department of Geriatrics, Orthopedics and Rheumatology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Matteo Tosato
- Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, 00168 Rome, Italy.
| | - Emanuele Marzetti
- Department of Geriatrics, Orthopedics and Rheumatology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, 00168 Rome, Italy.
| | - Francesco Landi
- Department of Geriatrics, Orthopedics and Rheumatology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, 00168 Rome, Italy.
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Zolfaghari M, Faramarzi M, Hedayati M, Ghaffari M. The effect of resistance and endurance training with ursolic acid on atrophy-related biomarkers in muscle tissue of diabetic male rats induced by streptozotocin and a high-fat diet. J Food Biochem 2022; 46:e14202. [PMID: 35593021 DOI: 10.1111/jfbc.14202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 04/05/2022] [Accepted: 04/11/2022] [Indexed: 12/22/2022]
Abstract
In this study, the effect of resistance and endurance training with/without ursolic acid supplementation was evaluated to identify atrophy-related biomarkers in elderly rats induced by diabetes and a high-fat diet (HFD) based on in silico analysis algorithms and pharmaceutical methods. The visualizer software found differential gene expression levels in skeletal muscle atrophy via computed hub gene network parameters. Also, the impact of ursolic acid, as a potent inducer of the Trp53 protein in ameliorating decreased muscle mass, was analyzed in diabetic rats. Fifty-six-old male Wistar rats were randomly assigned into seven groups, including healthy control (Control), diabetic control (DM), Ursolic acid supplementation (UA), resistance training (RT), endurance training (ET), resistance training+ Ursolic acid supplementation (RT + U), and endurance training in combination with Ursolic acid supplementation (ET + U). Exercise intervention included 8 weeks of resistance or endurance training programs. Biomedical informatic outputs determined the P53 signaling pathway as a remarkable causative factor in the pathomechanism of atrophy. In addition, the results demonstrated that exercise and supplementation of UA impeded the interactions among p53/ATF4/p21. Moreover, ET and ursolic acid had a synergetic effect on the signaling pathway of p53/ATF4/p21 and probably could inhibit the aging process and modulate the p53/ATF4/p21 molecular pathway. The interaction between UA and endurance exercise significantly modified the activity of the p53/ATF4/p21 signaling pathway. Based on in silico studies, the p53/ATF4/p21 pathway plays an essential role in aging, and the inhibition of this pathway would be beneficial in decelerating the aging process. PRACTICAL APPLICATIONS: Ursolic acid (UA) is a natural pentacyclic triterpenoid carboxylic acid found in apples (a major compound of apple wax) and other fruits; it is known to improve skeletal muscle function and reduce the muscular atrophy pathways. We indicated that p53/ATF4/p21 signaling is an essential factor in aging, and the suppression of this pathway could be beneficial in the deceleration of the aging process. Therefore, this work would shed light on understanding the effect of exercise and nutrition interventions on preventing atrophy markers of skeletal muscle in diabetic rats. Further studies are needed to seek the precise mechanism of the synergism between UA and exercise in ameliorating atrophy markers.
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Affiliation(s)
- Maryam Zolfaghari
- Department of Sport Sciences, Shahrekord University, Shahrekord, Iran
| | - Mohammad Faramarzi
- Faculty of Sport Sciences, Department of Exercise Physiology, University of Isfahan, Isfahan, Iran
| | - Mehdi Hedayati
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Ghaffari
- Department of Sport Sciences, Shahrekord University, Shahrekord, Iran
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Loquat Leaf Extract Enhances Muscle Contraction-Induced Activation of Protein Synthesis Signaling in Rat Skeletal Muscle. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:2234118. [PMID: 35783523 PMCID: PMC9249488 DOI: 10.1155/2022/2234118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 04/22/2022] [Accepted: 06/13/2022] [Indexed: 11/19/2022]
Abstract
Loquat (Eriobotrya japonica (Thunb.) Lindl.) leaves are traditionally used to improve muscle weakness, but their effects on muscle protein synthesis require further research. Therefore, we aimed to investigate whether loquat leaf extract (LLE) enhances muscle contraction-induced activation of muscle protein synthesis signaling. Male Wistar rats (12 weeks old, n = 6/group) were categorized into water treatment (CON) and LLE treatment (LLE) groups. The rats were administered distilled water or LLE (1.5 g/kg/day) once a day by oral gavage for 7 days. On day 7, at 3 h post-LLE administration, the gastrocnemius muscle in the right leg of each rat was stimulated by electrical muscle stimulation (EMS) (100 Hz, 30 V) through five sets of 10 isometric contractions (7 s contraction, 3 s rest) with 3 min interset intervals. The rats were then sacrificed, and the gastrocnemius muscles of both legs were excised at 3 h post-EMS. The phosphorylation levels of mammalian target of rapamycin complex 1 (mTORC1) signaling pathway molecules (Akt, mTOR, and p70S6K) were determined by Western blotting. Regarding the muscle contraction-induced protein synthesis signaling pathway, Akt phosphorylation at Ser473 was not significantly different between the CON and LLE groups. mTOR phosphorylation at Ser2448 was increased by EMS but did not show a significant difference between the CON and LLE groups. p70S6K phosphorylation at Thr389 was significantly increased in response to EMS, whereas the LLE group showed significantly higher p70S6K phosphorylation at Thr389 than that in the CON group. This suggests that LLE enhances muscle contraction-induced activation of p70S6K phosphorylation in rat skeletal muscles.
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Yadav A, Yadav SS, Singh S, Dabur R. Natural products: Potential therapeutic agents to prevent skeletal muscle atrophy. Eur J Pharmacol 2022; 925:174995. [PMID: 35523319 DOI: 10.1016/j.ejphar.2022.174995] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 04/19/2022] [Accepted: 04/28/2022] [Indexed: 12/16/2022]
Abstract
The skeletal muscle (SkM) is the largest organ, which plays a vital role in controlling musculature, locomotion, body heat regulation, physical strength, and metabolism of the body. A sedentary lifestyle, aging, cachexia, denervation, immobilization, etc. Can lead to an imbalance between protein synthesis and degradation, which is further responsible for SkM atrophy (SmA). To date, the understanding of the mechanism of SkM mass loss is limited which also restricted the number of drugs to treat SmA. Thus, there is an urgent need to develop novel approaches to regulate muscle homeostasis. Presently, some natural products attained immense attraction to regulate SkM homeostasis. The natural products, i.e., polyphenols (resveratrol, curcumin), terpenoids (ursolic acid, tanshinone IIA, celastrol), flavonoids, alkaloids (tomatidine, magnoflorine), vitamin D, etc. exhibit strong potential against SmA. Some of these natural products have been reported to have equivalent potential to standard treatments to prevent body lean mass loss. Indeed, owing to the large complexity, diversity, and slow absorption rate of bioactive compounds made their usage quite challenging. Moreover, the use of natural products is controversial due to their partially known or elusive mechanism of action. Therefore, the present review summarizes various experimental and clinical evidence of some important bioactive compounds that shall help in the development of novel strategies to counteract SmA elicited by various causes.
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Affiliation(s)
- Aarti Yadav
- Clinical Biochemistry Laboratory, Department of Biochemistry, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Surender Singh Yadav
- Department of Botany, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Sandeep Singh
- Department of Biochemistry, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Rajesh Dabur
- Clinical Biochemistry Laboratory, Department of Biochemistry, Maharshi Dayanand University, Rohtak, 124001, Haryana, India.
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Li W, Swiderski K, Murphy KT, Lynch GS. Role for Plant-Derived Antioxidants in Attenuating Cancer Cachexia. Antioxidants (Basel) 2022; 11:antiox11020183. [PMID: 35204066 PMCID: PMC8868096 DOI: 10.3390/antiox11020183] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 12/24/2022] Open
Abstract
Cancer cachexia is the progressive muscle wasting and weakness experienced by many cancer patients. It can compromise the response to gold standard cancer therapies, impair functional capacity and reduce overall quality of life. Cancer cachexia accounts for nearly one-third of all cancer-related deaths and has no effective treatment. The pathogenesis of cancer cachexia and its progression is multifactorial and includes increased oxidative stress derived from both the tumor and the host immune response. Antioxidants have therapeutic potential to attenuate cancer-related muscle loss, with polyphenols, a group of plant-derived antioxidants, being the most widely investigated. This review describes the potential of these plant-derived antioxidants for treating cancer cachexia.
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Affiliation(s)
- Wenlan Li
- Centre for Muscle Research, Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Kristy Swiderski
- Centre for Muscle Research, Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Kate T Murphy
- Centre for Muscle Research, Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Gordon S Lynch
- Centre for Muscle Research, Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia
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Shirai T, Uemichi K, Kubota K, Yamauchi Y, Takemasa T. Maslinic Acid Promotes Hypertrophy Induced by Functional Overload in Mouse Skeletal Muscle. J Nutr Sci Vitaminol (Tokyo) 2021; 67:317-322. [PMID: 34719617 DOI: 10.3177/jnsv.67.317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Nutritional supplements are sometimes important for athletes to improve their sports performance and maintain their condition. Maslinic acid (MA) is a type of compound with a pentacyclic triterpene structure extracted from olives, and has a strong anti-inflammatory effect and improves metabolic function. This study aimed to investigate the effects of MA on muscle hypertrophy by functional overload using an animal model. Mice plantaris muscles were overloaded by synergist ablation surgery with/without MA and they were sampled at 4, 7, and 14 d after the operation. We demonstrated that MA significantly increased plantaris' cross-sectional area and activated the mechanistic target of rapamycin (mTOR) signaling compared with the non-supplemented group (main effect of MA, p<0.05). In addition, MA also significantly reduced catabolic proteins compared with the non-supplemented group. MA supplementation increased muscle fiber size and promoted muscle hypertrophy via mTOR signaling. Our results indicate that MA supplementation may be useful for promoting hypertrophy of skeletal muscle.
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Affiliation(s)
- Takanaga Shirai
- Graduate School of Comprehensive Human Sciences, University of Tsukuba.,Reserch Fellow in Japan Society for Promotion Science
| | - Kazuki Uemichi
- Graduate School of Comprehensive Human Sciences, University of Tsukuba
| | - Kakeru Kubota
- School of Physical Education, Health and Sport Sciences, University of Tsukuba
| | - Yuki Yamauchi
- Tsukuba Life Science Innovation Program (T-LSI), University of Tsukuba
| | - Tohru Takemasa
- Faculty of Health and Sport Sciences, University of Tsukuba
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Yin L, Li N, Jia W, Wang N, Liang M, Yang X, Du G. Skeletal muscle atrophy: From mechanisms to treatments. Pharmacol Res 2021; 172:105807. [PMID: 34389456 DOI: 10.1016/j.phrs.2021.105807] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/03/2021] [Accepted: 08/07/2021] [Indexed: 02/07/2023]
Abstract
Skeletal muscle is a crucial tissue for movement, gestural assistance, metabolic homeostasis, and thermogenesis. It makes up approximately 40% of the total body weight and 50% of total protein. However, several pathological abnormalities (e.g., chronic diseases, cancer, long-term infection, aging) can induce an imbalance in skeletal muscle protein synthesis and degradation, which triggers muscle wasting and even leads to atrophy. Skeletal muscle atrophy is characterized by weakening, shrinking, and decreasing muscle mass and fiber cross-sectional area at the histological level. It manifests as a reduction in force production, easy fatigue and decreased exercise capability, along with a lower quality of life. Mechanistically, there are several pathophysiological processes involved in skeletal muscle atrophy, including oxidative stress and inflammation, which then activate signal transduction, such as the ubiquitin proteasome system, autophagy lysosome system, and mTOR. Considering the great economic and social burden that muscle atrophy can inflict, effective prevention and treatment strategies are essential but still limited. Exercise is widely acknowledged as the most effective therapy for skeletal muscle atrophy; unfortunately, it is not applicable for all patients. Several active substances for skeletal muscle atrophy have been discovered and evaluated in clinical trials, however, they have not been marketed to date. Knowledge is being gained on the underlying mechanisms, highlighting more promising treatment strategies in the future. In this paper, the mechanisms and treatment strategies for skeletal muscle atrophy are briefly reviewed.
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Affiliation(s)
- Lin Yin
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Na Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Weihua Jia
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Nuoqi Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Meidai Liang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China
| | - Xiuying Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China.
| | - Guanhua Du
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China.
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Ursolic Acid and Related Analogues: Triterpenoids with Broad Health Benefits. Antioxidants (Basel) 2021; 10:antiox10081161. [PMID: 34439409 PMCID: PMC8388988 DOI: 10.3390/antiox10081161] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/04/2021] [Accepted: 06/22/2021] [Indexed: 12/14/2022] Open
Abstract
Ursolic acid (UA) is a well-studied natural pentacyclic triterpenoid found in herbs, fruit and a number of traditional Chinese medicinal plants. UA has a broad range of biological activities and numerous potential health benefits. In this review, we summarize the current data on the bioavailability and pharmacokinetics of UA and review the literature on the biological activities of UA and its closest analogues in the context of inflammation, metabolic diseases, including liver and kidney diseases, obesity and diabetes, cardiovascular diseases, cancer, and neurological disorders. We end with a brief overview of UA’s main analogues with a special focus on a newly discovered naturally occurring analogue with intriguing biological properties and potential health benefits, 23-hydroxy ursolic acid.
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Qu Z, Zhou S, Li P, Liu C, Yuan B, Zhang S, Liu A. Natural products and skeletal muscle health. J Nutr Biochem 2021; 93:108619. [DOI: 10.1016/j.jnutbio.2021.108619] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 11/26/2020] [Accepted: 02/01/2021] [Indexed: 12/17/2022]
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Geerlofs L, He Z, Xiao S, Xiao ZC. 15-Day subchronic developmental toxicity studies of ursolic acid in rats. Food Chem Toxicol 2020; 144:111537. [PMID: 32649969 DOI: 10.1016/j.fct.2020.111537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/14/2020] [Accepted: 06/17/2020] [Indexed: 11/22/2022]
Abstract
Ursolic acid (UA) is a pentacyclic triterpenoid and has the characteristics to serve as a potential therapeutic agent for a range of disorders. However, detailed studies of the toxicity of UA, especially developmental toxicity of UA, are non-existing. The objective of this study was to determine the potential effects of UA on fetal development, adult reproductive system, and major organs. UA was dissolved in a 0.5% hydroxypropyl methylcellulose, 0.1% Tween 80 in Milli-Q Water solution. A 100, 300 or 1000 mg/kg/day dose of UA or a control vehicle was administered orally for 15 days to adults (Han Wistar) and pregnant females (Sprague-Dawley). The administration of UA in adults did not cause deaths or resulted in abnormal (reproductive) organ or body weights at the dose up to 1000 mg/kg/day. The administration of UA resulted in no significant toxicological changes in either maternal nor fetal subjects in terms of body weight, organ weights, food consumption, gross pathology, sex organs, maternal performances, and fetal performances. Together, this study indicates that oral dosing with UA is safe for adult rats and their offspring and the no observed adverse effect level for UA is likely higher than 1000 mg/kg/day.
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Affiliation(s)
- Lotte Geerlofs
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, Australia, 3168; iRiccorgpharm Health Pty Ltd, Melbourne, Australia, 3168
| | - Zhiyong He
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, Australia, 3168; iRiccorgpharm Health Pty Ltd, Melbourne, Australia, 3168.
| | - Sa Xiao
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, Australia, 3168; iRiccorgpharm Health Pty Ltd, Melbourne, Australia, 3168
| | - Zhi-Cheng Xiao
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, Australia, 3168; iRiccorgpharm Health Pty Ltd, Melbourne, Australia, 3168.
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14
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Enhanced skeletal muscle insulin sensitivity after acute resistance-type exercise is upregulated by rapamycin-sensitive mTOR complex 1 inhibition. Sci Rep 2020; 10:8509. [PMID: 32444657 PMCID: PMC7244536 DOI: 10.1038/s41598-020-65397-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/13/2020] [Indexed: 01/07/2023] Open
Abstract
Acute aerobic exercise (AE) increases skeletal muscle insulin sensitivity for several hours, caused by acute activation of AMP-activated protein kinase (AMPK). Acute resistance exercise (RE) also activates AMPK, possibly improving insulin-stimulated glucose uptake. However, RE-induced rapamycin-sensitive mechanistic target of rapamycin complex 1 (mTORC1) activation is higher and has a longer duration than after AE. In molecular studies, mTORC1 was shown to be upstream of insulin receptor substrate 1 (IRS-1) Ser phosphorylation residue, inducing insulin resistance. Therefore, we hypothesised that although RE increases insulin sensitivity through AMPK activation, prolonged mTORC1 activation after RE reduces RE-induced insulin sensitising effect. In this study, we used an electrical stimulation-induced RE model in rats, with rapamycin as an inhibitor of mTORC1 activation. Our results showed that RE increased insulin-stimulated glucose uptake following AMPK signal activation. However, mTORC1 activation and IRS-1 Ser632/635 and Ser612 phosphorylation were elevated 6 h after RE, with concomitant impairment of insulin-stimulated Akt signal activation. By contrast, rapamycin inhibited these prior exercise responses. Furthermore, increases in insulin-stimulated skeletal muscle glucose uptake 6 h after RE were higher in rats with rapamycin treatment than with placebo treatment. Our data suggest that mTORC1/IRS-1 signaling inhibition enhances skeletal muscle insulin-sensitising effect of RE.
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15
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Maruyama Y, Ikeda C, Wakabayashi K, Ato S, Ogasawara R. High-intensity muscle contraction-mediated increases in Akt1 and Akt2 phosphorylation do not contribute to mTORC1 activation and muscle protein synthesis. J Appl Physiol (1985) 2020; 128:830-837. [DOI: 10.1152/japplphysiol.00578.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
High-intensity muscle contraction (HiMC) is known to induce muscle protein synthesis, a process in which mechanistic target of rapamycin (mTOR) is reported to play a critical role. However, the mechanistic details have not been completely elucidated. Here, we investigated whether Akt plays a role in regulating HiMC-induced mTORC1 activation and muscle protein synthesis using a rodent model of resistance exercise and MK2206 (an Akt kinase inhibitor). The right gastrocnemius muscle of male C57BL/6J mice aged 10 wk was isometrically contracted via percutaneous electrical stimulation (100 Hz, 5 sets of 10 3-s contractions, 7-s rest between contractions, and 3-min rest between sets), while the left gastrocnemius muscle served as a control. Vehicle or MK2206 was injected intraperitoneally 6 h before contraction. MK2206 inhibited both resting and HiMC-induced phosphorylation of Akt1 Ser-473 and Akt2 Ser-474. MK2206 also inhibited the resting phosphorylation of p70S6K and 4E-BP1, which are downstream targets of mTORC1; however, it did not inhibit the HiMC-induced increase in phosphorylation of these targets. Similarly, MK2206 inhibited the resting muscle protein synthesis, but not the resistance exercise-induced muscle protein synthesis. On the basis of these observations, we conclude that although Akt2 regulates resting mTORC1 activity and muscle protein synthesis, HiMC-induced increases in mTORC1 activity and muscle protein synthesis are Akt-independent processes. NEW & NOTEWORTHY Akt is well known to be an upstream regulator of mechanistic target of rapamycin (mTOR) and has three isoforms in mammals, namely, Akt1, Akt2, and Akt3. We found that high-intensity muscle contraction (HiMC) increases Akt1 and Akt2 phosphorylation; however, HiMC-induced increases in mTORC1 activity and muscle protein synthesis are Akt-independent processes.
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Affiliation(s)
- Yuki Maruyama
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
| | - Chisaki Ikeda
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
| | - Koki Wakabayashi
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
| | - Satoru Ato
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
| | - Riki Ogasawara
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
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16
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Asghari E, Rashidlamir A, Hosseini SRA, Moazzami M, Samarghandian S, Farkhondeh T. Synergism Effects of Ursolic Acid Supplementation on the Levels of Irisin, C-reactive Protein, IL-6, and TNF-α During High-intensity Resistance Training in Low Activity Men. Cardiovasc Hematol Disord Drug Targets 2020; 20:138-144. [PMID: 31533605 DOI: 10.2174/1871529x19666190918144727] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 07/04/2019] [Accepted: 07/31/2019] [Indexed: 05/21/2023]
Abstract
BACKGROUND Ursolic Acid (UA) is a pentacyclic triterpenoid carboxylic acid which is extracted from plants. UA may enhance the effect of Resistance Training (RT) in human. OBJECTIVE Current research was designed to show the effect of High-Intensity Resistance Training (HIRT) in the presence or absence of UA on the serum levels of irisin, CRP, IL-6 and TNF-α in the low activity men. METHODS The study included twenty-two healthy male HIRT with placebo, supplementation, and HIRT in the presence of UA supplementation. The two groups received eight-week intervention including 2 sets of 8 exercises, with 8~10 repetitions at 70~75% of 1 repetition maximum and a 2 min rest interval between sets, performed 3 times/week. Placebo or UA orally was evaluated as 1 capsule 3 times/day during 8 weeks. The subsequent factors were measured post- and preintervention: C-Reactive Protein (CRP), Irisin, Tumor Necrotic Factor (TNF-α) and Interleukin-6 (IL-6). RESULTS UA supplementation significantly increased the plasma levels of irisin in the HIRT+UA group versus the HIRT+P group (p<0.05). UA treatment also dramatically decreased the plasma levels of CRP, IL-6, and TNF-α in the HIRT+UA group versus the HIRT+P group (p<0.05). CONCLUSION The current data showed that UA-induced an increase in serum irisin and reduction of CRP, IL-6, and TNF-α may have beneficial effects as a chemical for increasing of the effects of HIRT in low activity men.
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Affiliation(s)
- Ehsan Asghari
- Department of Physical Education and Sport Sciences, Faculty of Sport Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Amir Rashidlamir
- Department of Physical Education and Sport Sciences, Faculty of Sport Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Seyyed R A Hosseini
- Department of Physical Education and Sport Sciences, Faculty of Sport Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mahtab Moazzami
- Department of Physical Education and Sport Sciences, Faculty of Sport Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Saeed Samarghandian
- Department of Basic Medical Sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Tahereh Farkhondeh
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
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17
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Gharahdaghi N, Phillips BE, Szewczyk NJ, Smith K, Wilkinson DJ, Atherton PJ. Links Between Testosterone, Oestrogen, and the Growth Hormone/Insulin-Like Growth Factor Axis and Resistance Exercise Muscle Adaptations. Front Physiol 2020; 11:621226. [PMID: 33519525 PMCID: PMC7844366 DOI: 10.3389/fphys.2020.621226] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 12/18/2020] [Indexed: 12/13/2022] Open
Abstract
Maintenance of skeletal muscle mass throughout the life course is key for the regulation of health, with physical activity a critical component of this, in part, due to its influence upon key hormones such as testosterone, estrogen, growth hormone (GH), and insulin-like growth factor (IGF). Despite the importance of these hormones for the regulation of skeletal muscle mass in response to different types of exercise, their interaction with the processes controlling muscle mass remain unclear. This review presents evidence on the importance of these hormones in the regulation of skeletal muscle mass and their responses, and involvement in muscle adaptation to resistance exercise. Highlighting the key role testosterone plays as a primary anabolic hormone in muscle adaptation following exercise training, through its interaction with anabolic signaling pathways and other hormones via the androgen receptor (AR), this review also describes the potential importance of fluctuations in other hormones such as GH and IGF-1 in concert with dietary amino acid availability; and the role of estrogen, under the influence of the menstrual cycle and menopause, being especially important in adaptive exercise responses in women. Finally, the downstream mechanisms by which these hormones impact regulation of muscle protein turnover (synthesis and breakdown), and thus muscle mass are discussed. Advances in our understanding of hormones that impact protein turnover throughout life offers great relevance, not just for athletes, but also for the general and clinical populations alike.
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18
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Sumi K, Ashida K, Nakazato K. Resistance exercise with anti-inflammatory foods attenuates skeletal muscle atrophy induced by chronic inflammation. J Appl Physiol (1985) 2020; 128:197-211. [DOI: 10.1152/japplphysiol.00585.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Chronic inflammation (CI) can contribute to muscle atrophy and sarcopenia. Resistance exercise (RE) promotes increased and/or maintenance of skeletal muscle mass, but the effects of RE in the presence of CI are unclear. In this study, we developed a novel animal model of CI-induced muscle atrophy and examined the effect of acute or chronic RE by electrical stimulation. CI was induced in young female Lewis rats by injection with peptidoglycan-polysaccharide (PG-PS). Extracellular signal-regulated kinase (ERK), p70S6 kinase (p70S6K), 4E binding protein 1 (4E-BP1), Akt, and Forkhead box O1 (FOXO1) phosphorylation levels increased in gastrocnemius (Gas) muscle from normal rats subjected to acute RE. After acute RE in CI rats, increased levels of phosphorylated ERK, p70S6K, and 4E-BP1, but not Akt or FOXO1, were observed. Chronic RE significantly increased the Gas weight in the exercised limb relative to the nontrained opposing limb in CI rats. Dietary supplementation with anti-inflammatory agents, eicosapentaenoic/docosahexaenoic acid and α-lactalbumin attenuated CI-induced muscle atrophy in the untrained Gas and could promote RE-induced inhibition of atrophy in the trained Gas. In the trained leg, significant negative correlations ( r ≤ −0.80) were seen between Gas weights and CI indices, including proinflammatory cytokines and white blood cell count. These results indicated that the anabolic effects of RE are effective for preventing CI-induced muscle atrophy but are partially attenuated by inflammatory molecules. The findings also suggested that anti-inflammatory treatment together with RE is an effective intervention for muscle atrophy induced by CI. Taken together, we conclude that systemic inflammation levels are associated with skeletal muscle protein metabolism and plasticity. NEW & NOTEWORTHY This study developed a novel chronic inflammation (CI) model rat demonstrating that resistance exercise (RE) induced activation of protein synthesis signaling pathways and mitigated skeletal muscle atrophy. These anabolic effects were partially abrogated likely through attenuation of Akt/Forkhead box O1 axis activity. The degree of skeletal muscle atrophy was related to inflammatory responses. Dietary supplementation with anti-inflammatory agents could enhance the anabolic effect of RE. Our findings provide insight for development of countermeasures for CI-related muscle atrophy, especially secondary sarcopenia.
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Affiliation(s)
- Koichiro Sumi
- Food Microbiology and Function Research Laboratories, R&D Division, Meiji Co., Ltd., Hachiouji, Tokyo, Japan
| | - Kinya Ashida
- Food Microbiology and Function Research Laboratories, R&D Division, Meiji Co., Ltd., Hachiouji, Tokyo, Japan
| | - Koichi Nakazato
- Department of Exercise Physiology, Nippon Sports Science University, Setagaya-ku, Tokyo, Japan
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19
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Makanae Y, Ato S, Kido K, Fujita S. Dietary Aronia melanocarpa extract enhances mTORC1 signaling, but has no effect on protein synthesis and protein breakdown-related signaling, in response to resistance exercise in rat skeletal muscle. J Int Soc Sports Nutr 2019; 16:60. [PMID: 31829236 PMCID: PMC6907222 DOI: 10.1186/s12970-019-0328-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 11/29/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ursolic acid altered muscle protein metabolism in normal and resting conditions after acute resistance exercise, suggesting that eating fruits rich in ursolic acid could enhance muscle protein synthesis and decrease muscle degradation. Aronia melanocarpa, a member of the family Rosaceae and native to North America and Eastern Canada, is rich in ursolic acid. In this study, we examined the effects of A. melanocarpa extract (AME) supplementation on the mTORC1 signaling pathway and muscle degradation-related factors in rats, both alone and in combination with resistance exercise. METHODS Male Sprague-Dawley rats were divided into AME and normal chow (NOR) groups. AME group was fed chow providing a dose of 3 g/kg of AME and 115 mg/kg of ursolic acid for 7 days, whereas NOR rats were fed normal powder chow. The right gastrocnemius muscle of each animal was isometrically exercised (5 sets of ten 3-s contractions, with a 7-s interval between contractions and 3-min rest intervals between sets), while the left gastrocnemius muscle served as an internal control. Western blotting and real-time polymerase chain reaction were used to assess expression of factors involved in the mTORC1 signaling pathway and muscle degradation. RESULTS At 1 h after resistance exercise, phosphorylation of ERK1/2 was significantly increased by AME consumption. At 6 h after resistance exercise, AME consumption significantly increased the phosphorylation of Akt, p70S6K, rpS6, and AMPK. It also increased MAFbx expression. Furthermore, AME significantly increased the phosphorylation of p70S6K and rpS6 in response to resistance exercise. However, AME did not increase muscle protein synthesis (MPS) after resistance exercise. AME did not affect the expression of any of the mediators of protein degradation, with the exception of MAFbx. CONCLUSIONS Dietary AME enhanced mTORC1 activation in response to resistance exercise without increasing MPS. Moreover, it neither accelerated muscle protein degradation nor otherwise negatively affected protein metabolism. Further study is needed to clarify the effect of the combination of AME and chronic resistance training on muscle hypertrophy.
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Affiliation(s)
- Yuhei Makanae
- Department of Physical Education, National Defense Academy, Yokosuka, Kanagawa Japan
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga Japan
- Faculty of Sports and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan
| | - Satoru Ato
- Faculty of Sports and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
| | - Kohei Kido
- Faculty of Sports and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Envionmental Studies, Kyoto University, Kyoto, Japan
| | - Satoshi Fujita
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga Japan
- Faculty of Sports and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan
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20
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Bigford GE, Darr AJ, Bracchi-Ricard VC, Gao H, Nash MS, Bethea JR. Effects of ursolic acid on sub-lesional muscle pathology in a contusion model of spinal cord injury. PLoS One 2018; 13:e0203042. [PMID: 30157245 PMCID: PMC6114926 DOI: 10.1371/journal.pone.0203042] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 08/14/2018] [Indexed: 12/25/2022] Open
Abstract
Spinal Cord Injury (SCI) results in severe sub-lesional muscle atrophy and fiber type transformation from slow oxidative to fast glycolytic, both contributing to functional deficits and maladaptive metabolic profiles. Therapeutic countermeasures have had limited success and muscle-related pathology remains a clinical priority. mTOR signaling is known to play a critical role in skeletal muscle growth and metabolism, and signal integration of anabolic and catabolic pathways. Recent studies show that the natural compound ursolic acid (UA) enhances mTOR signaling intermediates, independently inhibiting atrophy and inducing hypertrophy. Here, we examine the effects of UA treatment on sub-lesional muscle mTOR signaling, catabolic genes, and functional deficits following severe SCI in mice. We observe that UA treatment significantly attenuates SCI induced decreases in activated forms of mTOR, and signaling intermediates PI3K, AKT, and S6K, and the upregulation of catabolic genes including FOXO1, MAFbx, MURF-1, and PSMD11. In addition, UA treatment improves SCI induced deficits in body and sub-lesional muscle mass, as well as functional outcomes related to muscle function, motor coordination, and strength. These findings provide evidence that UA treatment may be a potential therapeutic strategy to improve muscle-specific pathological consequences of SCI.
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Affiliation(s)
- Gregory E. Bigford
- The Miami Project to Cure Paralysis, Miami, Florida, United States of America
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Andrew J. Darr
- Department of Health Sciences Education, University of Illinois College of Medicine at Peoria, Peoria, Illinois, United States of America
| | | | - Han Gao
- The Miami Project to Cure Paralysis, Miami, Florida, United States of America
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Mark S. Nash
- The Miami Project to Cure Paralysis, Miami, Florida, United States of America
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- Department of Rehabilitation Medicine, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - John R. Bethea
- Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America
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21
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Takamura Y, Nomura M, Uchiyama A, Fujita S. Effects of Aerobic Exercise Combined with Panaxatriol Derived from Ginseng on Insulin Resistance and Skeletal Muscle Mass in Type 2 Diabetic Mice. J Nutr Sci Vitaminol (Tokyo) 2018; 63:339-348. [PMID: 29225319 DOI: 10.3177/jnsv.63.339] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Insulin resistance reduces insulin-induced muscle protein synthesis and accelerates muscle protein degradation. Ginseng ingestion has been reported to improve insulin resistance through the phosphoinositide 3-kinase (PI3K)/Akt signaling pathway. We hypothesized that panaxatriol (PT) derived from ginseng in combination with aerobic exercise (EX) may further promote protein synthesis and suppress protein degradation, and subsequently maintain muscle mass through the amelioration of insulin resistance. KKAy insulin-resistant mice were divided into control, panaxatriol only (PT), exercise only (EX), and EX+PT groups. EX and EX+PT ran on the treadmill for 45 min at 15 m/min 5 d/wk for 6 wk. PT and EX+PT groups were fed a standard diet containing 0.2% PT for 6 wk. Homeostasis model assessment for insulin resistance (HOMA-R) values was significantly improved after exercise for 6 wk. Moreover, EX+PT mice showed improved HOMA-R as compared to EX mice. p70S6K phosphorylation after a 4 h fast was significantly higher in EX than in the non-exercise control, and it was higher in EX+PT mice than in EX mice. Atrogin1 mRNA expression was significantly lower in EX than in the non-exercise control, and was significantly lowered further by PT treatment. EX and EX+PT mice showed higher soleus muscle mass and cross-sectional area (CSA) of the soleus myofibers than control animals, with higher values noted for both parameters in EX+PT than in EX. These results suggest that aerobic exercise and PT ingestion may contribute to maintain skeletal muscle mass through the amelioration of insulin resistance.
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Affiliation(s)
- Yusuke Takamura
- Research and Development Headquarters, Lion Corporation.,Faculty of Sport and Health Science, Ritsumeikan University
| | | | | | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University
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22
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Kim JC, Kang YS, Noh EB, Seo BW, Seo DY, Park GD, Kim SH. Concurrent treatment with ursolic acid and low-intensity treadmill exercise improves muscle atrophy and related outcomes in rats. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 22:427-436. [PMID: 29962857 PMCID: PMC6019874 DOI: 10.4196/kjpp.2018.22.4.427] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 05/27/2018] [Accepted: 06/08/2018] [Indexed: 02/06/2023]
Abstract
The objective of this study was to analyze the concurrent treatment effects of ursolic acid (UA) and low-intensity treadmill exercise and to confirm the effectiveness of UA as an exercise mimetic to safely improve muscle atrophy-related diseases using Sprague-Dawley (SD) rats with skeletal muscle atrophy. Significant muscle atrophy was induced in male SD rats through hind limb immobilization using casting for 10 days. The muscle atrophy-induced SD rats were group into four: SED, sedentary; UA, daily intraperitoneal UA injection, 5 mg/kg; EX, low-intensity (10–12 m/min, 0° grade) treadmill exercise; and UEX, daily intraperitoneal UA injection, 5 mg/kg, and low-intensity (10–12 m/min, 0° grade) treadmill exercise. After 8 weeks of treatment, endurance capacity was analyzed using a treadmill, and tissues were extracted for analysis of visceral fat mass, body weight, muscle mass, expression of muscle atrophy- and hypertrophy-related genes, and endurance capacity. Although the effects of body weight gain control, muscle mass increase, and endurance capacity improvement were inadequate in the UA group, significant results were confirmed in the UEX group. The UEX group had significantly reduced body weight and visceral fat, significantly improved mass of tibialis anterior and gastrocnemius muscles, and significantly decreased atrophy-related gene expression of MuRF1 and atrogin-1, but did not have significant change in hypertrophy-related gene expression of Akt and mTOR. The endurance capacity was significantly improved in the EX and UEX groups. These data suggest that concurrent treatment with low-intensity exercise and UA is effective for atrophy-related physical dysfunctions.
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Affiliation(s)
- Jae Cheol Kim
- Department of Sports Science, College of Natural Science, Chonbuk National University, Jeonju 54896, Korea
| | - Yun Seok Kang
- Department of Sports Science, College of Natural Science, Chonbuk National University, Jeonju 54896, Korea
| | - Eun Bi Noh
- Department of Sports Science, College of Natural Science, Chonbuk National University, Jeonju 54896, Korea
| | - Baek Woon Seo
- Department of Sports Science, College of Natural Science, Chonbuk National University, Jeonju 54896, Korea
| | - Dae Yun Seo
- Department of Physiology, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Gi Duck Park
- Department of Leisure Sport, Kyungpook National University, Sangju 37224, Korea
| | - Sang Hyun Kim
- Department of Sports Science, College of Natural Science, Chonbuk National University, Jeonju 54896, Korea
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23
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Seo DY, Lee SR, Heo JW, No MH, Rhee BD, Ko KS, Kwak HB, Han J. Ursolic acid in health and disease. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 22:235-248. [PMID: 29719446 PMCID: PMC5928337 DOI: 10.4196/kjpp.2018.22.3.235] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/16/2018] [Accepted: 03/19/2018] [Indexed: 12/22/2022]
Abstract
Ursolic acid (UA) is a natural triterpene compound found in various fruits and vegetables. There is a growing interest in UA because of its beneficial effects, which include anti-inflammatory, anti-oxidant, anti-apoptotic, and anti-carcinogenic effects. It exerts these effects in various tissues and organs: by suppressing nuclear factor-kappa B signaling in cancer cells, improving insulin signaling in adipose tissues, reducing the expression of markers of cardiac damage in the heart, decreasing inflammation and increasing the level of anti-oxidants in the brain, reducing apoptotic signaling and the level of oxidants in the liver, and reducing atrophy and increasing the expression levels of adenosine monophosphate-activated protein kinase and irisin in skeletal muscles. Moreover, UA can be used as an alternative medicine for the treatment and prevention of cancer, obesity/diabetes, cardiovascular disease, brain disease, liver disease, and muscle wasting (sarcopenia). In this review, we have summarized recent data on the beneficial effects and possible uses of UA in health and disease managements.
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Affiliation(s)
- Dae Yun Seo
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, BK21 Plus Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Sung Ryul Lee
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, BK21 Plus Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea.,Department of Convergence Biomedical Science, Inje University, Busan 47392, Korea
| | - Jun-Won Heo
- Department of Kinesiology, Inha University, Incheon 22212, Korea
| | - Mi-Hyun No
- Department of Kinesiology, Inha University, Incheon 22212, Korea
| | - Byoung Doo Rhee
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, BK21 Plus Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Kyung Soo Ko
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, BK21 Plus Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea
| | - Hyo-Bum Kwak
- Department of Kinesiology, Inha University, Incheon 22212, Korea
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, BK21 Plus Team, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea.,Department of Health Science and Technology, Graduate School, Inje University, Busan 47392, Korea
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24
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Sakuma K, Yamaguchi A. Drugs of Muscle Wasting and Their Therapeutic Targets. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1088:463-481. [PMID: 30390265 DOI: 10.1007/978-981-13-1435-3_21] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Muscle wasting and weakness such as cachexia, atrophy, and sarcopenia are characterized by marked decreases in the protein content, myonuclear number, muscle fiber size, and muscle strength. This chapter focuses on the recent advances of pharmacological approach for attenuating muscle wasting.A myostatin-inhibiting approach is very intriguing to prevent sarcopenia but not muscular dystrophy in humans. Supplementation with ghrelin is also an important candidate to combat sarcopenia as well as cachexia. Treatment with soy isoflavone, trichostatin A (TSA), and cyclooxygenase 2 (Cox2) inhibitors seems to be effective modulators attenuating muscle wasting, although further systematic research is needed on this treatment in particular concerning side effects.
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Affiliation(s)
- Kunihiro Sakuma
- Institute for Liberal Arts, Environment and Society, Tokyo Institute of Technology, Tokyo, Japan.
| | - Akihiko Yamaguchi
- Department of Physical Therapy, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
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Ato S, Makanae Y, Kido K, Fujita S. Contraction mode itself does not determine the level of mTORC1 activity in rat skeletal muscle. Physiol Rep 2017; 4:4/19/e12976. [PMID: 27688433 PMCID: PMC5064134 DOI: 10.14814/phy2.12976] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 08/19/2016] [Indexed: 11/24/2022] Open
Abstract
Resistance training with eccentric contraction has been shown to augment muscle hypertrophy more than other contraction modes do (i.e., concentric and isometric contraction). However, the molecular mechanisms involved remain unclear. The purpose of this study was to investigate the effect of muscle contraction mode on mammalian target of rapamycin complex 1 (mTORC1) signaling using a standardized force‐time integral (load (weight) × contraction time). Male Sprague–Dawley rats were randomly assigned to three groups: eccentric contraction, concentric contraction, and isometric contraction. The right gastrocnemius muscle was exercised via percutaneous electrical stimulation‐induced maximal contraction. In experiment 1, different modes of muscle contraction were exerted using the same number of reps in all groups, while in experiment 2, muscle contractions were exerted using a standardized force‐time integral. Muscle samples were obtained immediately and 3 h after exercise. Phosphorylation of molecules associated with mTORC1 activity was assessed using western blot analysis. In experiment 1, the force‐time integral was significantly different among contraction modes with a higher force‐time integral for eccentric contraction compared to that for other contraction modes (P < 0.05). In addition, the force‐time integral was higher for concentric contraction compared to that for isometric contraction (P < 0.05). Similarly, p70S6K phosphorylation level was higher for eccentric contraction than for other modes of contraction (P < 0.05), and concentric contraction was higher than isometric contraction (P < 0.05) 3 h after exercise. In experiment 2, under the same force‐time integral, p70S6K (Thr389) and 4E‐BP1 phosphorylation levels were similar among contraction modes 3 h after exercise. Our results suggest that mTORC1 activity is not determined by differences in muscle contraction mode itself. Instead, mTORC1 activity is determined by differences in the force‐time integral during muscle contraction.
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Affiliation(s)
- Satoru Ato
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Yuhei Makanae
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Kohei Kido
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
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Kido K, Ato S, Yokokawa T, Makanae Y, Sato K, Fujita S. Acute resistance exercise-induced IGF1 expression and subsequent GLUT4 translocation. Physiol Rep 2017; 4:4/16/e12907. [PMID: 27550988 PMCID: PMC5002915 DOI: 10.14814/phy2.12907] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 07/21/2016] [Indexed: 11/29/2022] Open
Abstract
Acute aerobic exercise (AE) is a major physiological stimulus for skeletal muscle glucose uptake through activation of 5′ AMP‐activated protein kinase (AMPK). However, the regulation of glucose uptake by acute resistance exercise (RE) remains unclear. To investigate the intracellular regulation of glucose uptake after acute RE versus acute AE, male Sprague–Dawley rats were divided into three groups: RE, AE, or nonexercise control. After fasting for 12 h overnight, the right gastrocnemius muscle in the RE group was exercised at maximum isometric contraction via percutaneous electrical stimulation (3 × 10 sec, 5 sets). The AE group ran on a treadmill (25 m/min, 60 min). Muscle samples were taken 0, 1, and 3 h after completion of the exercises. AMPK, Ca2+/calmodulin‐dependent protein kinase II, and TBC1D1 phosphorylation were increased immediately after both forms of exercise and returned to baseline levels by 3 h. Muscle IGF1 expression was increased by RE but not AE, and maintained until 3 h after RE. Additionally, Akt and AS160 phosphorylation were sustained for 3 h after RE, whereas they returned to baseline levels by 3 h after AE. Similarly, GLUT4 translocation remained elevated 3 h after RE, although it returned to the baseline level by 3 h after AE. Overall, this study showed that AMPK/TBC1D1 and IGF1/Akt/AS160 signaling were enhanced by acute RE, and that GLUT4 translocation after acute RE was more prolonged than after acute AE. These results suggest that acute RE‐induced increases in intramuscular IGF1 expression might be a distinct regulator of GLUT4 translocation.
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Affiliation(s)
- Kohei Kido
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Satoru Ato
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Takumi Yokokawa
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Yuhei Makanae
- Department of Physical Education, National Defense Academy, Yokosuka, Japan
| | - Koji Sato
- Graduate School of Human Development and Environment, Kobe University, Kobe, Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
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Nakai N, Kawano F, Murakami T, Nakata K, Higashida K. Leucine supplementation after mechanical stimulation activates protein synthesis via L-type amino acid transporter 1 in vitro. J Cell Biochem 2017; 119:2094-2101. [PMID: 28856713 DOI: 10.1002/jcb.26371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 08/23/2017] [Indexed: 11/11/2022]
Abstract
Branched-chain amino acid supplements consumed following exercise are widely used to increase muscle mass. Although both exercise (ie, mechanical stimulation) and branched-chain amino acid leucine supplementation have been reported to stimulate muscle protein synthesis by activating the mammalian target of rapamycin (mTOR) signaling pathway independently, the mechanisms underlying their synergistic effects are largely unknown. Utilizing cultured differentiated C2C12 myotubes, we established a combination treatment model in which the cells were subjected to cyclic uniaxial mechanical stretching (4 h, 15%, 1 Hz) followed by stimulation with 2 mM leucine for 45 min. Phosphorylation of p70 S6 kinase (p70S6K), an mTOR-regulated marker of protein translation initiation, was significantly increased following mechanical stretching alone but returned to the baseline after 4 h. Leucine supplementation further increased p70S6K phosphorylation, with a greater increase observed in the stretched cells than in the non-stretched cells. Notably, the expression of L-type amino acid transporter 1 (LAT1), a stimulator of the mTOR pathway, was also increased by mechanical stretching, and siRNA-mediated knockdown partially attenuated leucine-induced p70S6K phosphorylation. These results suggest that mechanical stretching promotes LAT1 expression and, consequently, amino acid uptake, leading to enhanced leucine-induced activation of protein synthesis. LAT1 has been demonstrated to be a point of crosstalk between exercise- and nutrition-induced skeletal muscle growth.
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Affiliation(s)
- Naoya Nakai
- Department of Nutrition, University of Shiga Prefecture, Hikone, Shiga, Japan
| | - Fuminori Kawano
- Graduate School of Health Sciences, Matsumoto University, Matsumoto, Nagano, Japan
| | - Taro Murakami
- Department of Nutrition, Shigakkan University, Ohbu, Aichi, Japan
| | - Ken Nakata
- Medicine for Sports and Performing Arts, Graduate School of Medicine, Osaka University, Toyonaka, Osaka, Japan
| | - Kazuhiko Higashida
- Department of Nutrition, University of Shiga Prefecture, Hikone, Shiga, Japan
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Rezaei R, Nourshahi M, Khodagholi F, Haghparast A, Nasoohi S, Bigdeli M, Ashabi G. Differential impact of treadmill training on stroke-induced neurological disorders. Brain Inj 2017; 31:1910-1917. [DOI: 10.1080/02699052.2017.1346287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Rasoul Rezaei
- Department of Sport Physiology, Faculty of Physical Education and Sport Sciences, Shahid Beheshti University, G.C., Evin 198396113, Tehran, Iran
| | - Maryam Nourshahi
- Department of Sport Physiology, Faculty of Physical Education and Sport Sciences, Shahid Beheshti University, G.C., Evin 198396113, Tehran, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Haghparast
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sanaz Nasoohi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Ghorbangol Ashabi
- Department of Physiology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Katashima CK, Silva VR, Gomes TL, Pichard C, Pimentel GD. Ursolic acid and mechanisms of actions on adipose and muscle tissue: a systematic review. Obes Rev 2017; 18:700-711. [PMID: 28335087 DOI: 10.1111/obr.12523] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 01/21/2017] [Accepted: 01/22/2017] [Indexed: 12/28/2022]
Abstract
This systematic review aimed at addressing the ursolic acid actions as an adjunctive treatment of the obesity-mediated metabolic abnormalities. To explore our aims, we used the literature search including clinical and animal studies using the Medline and Google Scholar (up to December 2015). Out of 63 screened studies, 17 presented eligibility criteria, such as the use of ursolic acid on adiposity, energy expenditure and skeletal muscle mass in mice and humans. In the literature, we found that several physiological and molecular mechanisms are implicated in the effects of ursolic acid on obesity, energy expenditure, hepatic steatosis, skeletal muscle mass loss and physical fitness, such as (1) increase of thermogenesis by modulation adipocyte transcription factors, activation of 5' adenosine monophosphate-activated protein kinase and overexpression of the uncoupling protein 1 thermogenic marker; (2) enhancement of skeletal muscle mass by activation in bloodstream growth hormone and insulin-like growth factor-1 concentrations secretion, as well as in the activation of mammalian target of rapamycin and inhibition of ring-finger protein-1; and (3) improvement of physical fitness by skeletal muscle proliferator-activated receptor gamma co-activator alpha and sirtuin 1 expression. Therefore, supplementation with ursolic acid may be an adjunctive therapy for prevention and treatment of obesity-mediated and muscle mass-mediated metabolic consequences.
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Affiliation(s)
| | | | - Tatyanne L Gomes
- Clinical and Sports Nutrition Research Laboratory (Labince), School of Nutrition (FANUT), Federal University of Goias (UFG), Goiânia, GO, Brazil
| | - Claude Pichard
- Nutrition Unit, Geneva University Hospital, Geneva, Switzerland
| | - Gustavo D Pimentel
- Clinical and Sports Nutrition Research Laboratory (Labince), School of Nutrition (FANUT), Federal University of Goias (UFG), Goiânia, GO, Brazil
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Kido K, Yokokawa T, Ato S, Sato K, Fujita S. Effect of resistance exercise under conditions of reduced blood insulin on AMPKα Ser485/491 inhibitory phosphorylation and AMPK pathway activation. Am J Physiol Regul Integr Comp Physiol 2017; 313:R110-R119. [PMID: 28515080 DOI: 10.1152/ajpregu.00063.2017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 05/02/2017] [Accepted: 05/15/2017] [Indexed: 11/22/2022]
Abstract
Insulin stimulates skeletal muscle glucose uptake via activation of the protein kinase B/Akt (Akt) pathway. Recent studies suggest that insulin downregulates AMP-activated protein kinase (AMPK) activity via Ser485/491 phosphorylation of the AMPK α-subunit. Thus lower blood insulin concentrations may induce AMPK signal activation. Acute exercise is one method to stimulate AMPK activation; however, no study has examined the relationship between blood insulin levels and acute resistance exercise-induced AMPK pathway activation. Based on previous findings, we hypothesized that the acute resistance exercise-induced AMPK pathway activation would be augmented by disruptions in insulin secretion through a decrease in AMPKα Ser485/491 inhibitory phosphorylation. To test the hypothesis, 10-wk-old male Sprague-Dawley rats were administered the toxin streptozotocin (STZ; 55 mg/kg) to destroy the insulin secreting β-cells. Three days postinjection, the right gastrocnemius muscle from STZ and control rats was subjected to resistance exercise by percutaneous electrical stimulation. Animals were killed 0, 1, or 3 h later; activation of the Akt/AMPK and downstream pathways in the muscle tissue was analyzed by Western blotting and real-time PCR. Notably, STZ rats showed a significant decrease in basal Akt and AMPKα Ser485/491 phosphorylation, but substantial exercise-induced increases in both AMPKα Thr172 and acetyl-CoA carboxylase (ACC) Ser79 phosphorylation were observed. Although no significant impact on resistance exercise-induced Akt pathway activation or glucose uptake was found, resistance exercise-induced peroxisome proliferator-activated receptor (PPAR)-γ coactivator-1 α (PGC-1α) gene expression was augmented by STZ treatment. Collectively, these data suggest that circulating insulin levels may regulate acute resistance exercise-induced AMPK pathway activation and AMPK-dependent gene expression relating to basal AMPKα Ser485/491 phosphorylation.
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Affiliation(s)
- Kohei Kido
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Takumi Yokokawa
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan; and
| | - Satoru Ato
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Koji Sato
- Graduate School of Human Development and Environment, Kobe University, Kobe, Hyogo, Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan;
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Deane CS, Wilkinson DJ, Phillips BE, Smith K, Etheridge T, Atherton PJ. "Nutraceuticals" in relation to human skeletal muscle and exercise. Am J Physiol Endocrinol Metab 2017; 312:E282-E299. [PMID: 28143855 PMCID: PMC5406990 DOI: 10.1152/ajpendo.00230.2016] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 01/25/2017] [Accepted: 01/25/2017] [Indexed: 12/16/2022]
Abstract
Skeletal muscles have a fundamental role in locomotion and whole body metabolism, with muscle mass and quality being linked to improved health and even lifespan. Optimizing nutrition in combination with exercise is considered an established, effective ergogenic practice for athletic performance. Importantly, exercise and nutritional approaches also remain arguably the most effective countermeasure for muscle dysfunction associated with aging and numerous clinical conditions, e.g., cancer cachexia, COPD, and organ failure, via engendering favorable adaptations such as increased muscle mass and oxidative capacity. Therefore, it is important to consider the effects of established and novel effectors of muscle mass, function, and metabolism in relation to nutrition and exercise. To address this gap, in this review, we detail existing evidence surrounding the efficacy of a nonexhaustive list of macronutrient, micronutrient, and "nutraceutical" compounds alone and in combination with exercise in relation to skeletal muscle mass, metabolism (protein and fuel), and exercise performance (i.e., strength and endurance capacity). It has long been established that macronutrients have specific roles and impact upon protein metabolism and exercise performance, (i.e., protein positively influences muscle mass and protein metabolism), whereas carbohydrate and fat intakes can influence fuel metabolism and exercise performance. Regarding novel nutraceuticals, we show that the following ones in particular may have effects in relation to 1) muscle mass/protein metabolism: leucine, hydroxyl β-methylbutyrate, creatine, vitamin-D, ursolic acid, and phosphatidic acid; and 2) exercise performance: (i.e., strength or endurance capacity): hydroxyl β-methylbutyrate, carnitine, creatine, nitrates, and β-alanine.
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Affiliation(s)
- Colleen S Deane
- Medical Research Council-Arthritis Research UK Centre of Excellence for Musculoskeletal Ageing Research and Clinical, Metabolic, and Molecular Physiology, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
- Faculty of Health and Social Science, Bournemouth University, Bournemouth, United Kingdom; and
- Department of Sport and Health Science, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Daniel J Wilkinson
- Medical Research Council-Arthritis Research UK Centre of Excellence for Musculoskeletal Ageing Research and Clinical, Metabolic, and Molecular Physiology, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
| | - Bethan E Phillips
- Medical Research Council-Arthritis Research UK Centre of Excellence for Musculoskeletal Ageing Research and Clinical, Metabolic, and Molecular Physiology, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
| | - Kenneth Smith
- Medical Research Council-Arthritis Research UK Centre of Excellence for Musculoskeletal Ageing Research and Clinical, Metabolic, and Molecular Physiology, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
| | - Timothy Etheridge
- Department of Sport and Health Science, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Philip J Atherton
- Medical Research Council-Arthritis Research UK Centre of Excellence for Musculoskeletal Ageing Research and Clinical, Metabolic, and Molecular Physiology, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom;
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Panaxatriol derived from ginseng augments resistance exercised-induced protein synthesis via mTORC1 signaling in rat skeletal muscle. Nutr Res 2016; 36:1193-1201. [PMID: 27865617 DOI: 10.1016/j.nutres.2016.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 08/19/2016] [Accepted: 09/08/2016] [Indexed: 12/28/2022]
Abstract
Resistance exercise activates muscle protein synthesis via the mammalian target of rapamycin complex 1 (mTORC1) pathway and subsequent muscle hypertrophy. Upstream components of the mTORC1 pathway are widely known to be involved in Akt and extracellular signal-regulated kinase 1/2 (ERK1/2) signaling. Previous studies have shown that ginseng stimulated Akt and ERK1/2 signaling. Therefore, we hypothesized that panaxatriol (PT) derived from ginseng triggers mTORC1 signaling and muscle protein synthesis by activating both the Akt and ERK1/2 signaling pathways, and that PT additively stimulates muscle protein synthesis when combined with resistance exercise. The study included male Sprague-Dawley rats. The legs of the rats were divided into control, PT-only, exercise-only, and exercise + PT groups. The right legs were subjected to isometric resistance exercise using percutaneous electrical stimulation, whereas the left legs were used as controls. PT (0.2 g/kg) was administered immediately after exercise. The Akt and ERK1/2 phosphorylation levels were significantly higher in the exercise + PT group than in the exercise-only group 0.5 hour after exercise. The phosphorylation of p70S6K was significantly increased at both 0.5 and 3 hours after exercise, and it was higher in the exercise + PT group than in the exercise-only group at both 0.5 and 3 hours after exercise. Muscle protein synthesis was significantly increased 3 hours after exercise, and it was higher in the exercise + PT group than in the exercise-only group 3 hours after exercise. Our results suggest that PT derived from ginseng enhances resistance exercise-induced protein synthesis via mTORC1 signaling in rat skeletal muscle.
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Church DD, Schwarz NA, Spillane MB, McKinley-Barnard SK, Andre TL, Ramirez AJ, Willoughby DS. l-Leucine Increases Skeletal Muscle IGF-1 but Does Not Differentially Increase Akt/mTORC1 Signaling and Serum IGF-1 Compared to Ursolic Acid in Response to Resistance Exercise in Resistance-Trained Men. J Am Coll Nutr 2016; 35:627-638. [PMID: 27331824 DOI: 10.1080/07315724.2015.1132019] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Ursolic acid administration following resistance exercise increases mammalian target of rapamycin complex 1 (mTORC1) activity and skeletal muscle IGF-1 concentration in murines in a manner similar to l-leucine yet remains unexamined in humans. This study examined serum and skeletal muscle insulin-like growth factor-1 (IGF-1) and Akt/mTORC1 signaling activity following ingestion of either ursolic acid or l-leucine immediately after resistance exercise. METHODS Nine resistance-trained men performed 3 lower-body resistance exercise sessions involving 4 sets of 8-10 repetitions at 75%-80% one repetition maximum (1-RM) on the angled leg press and knee extension exercises. Immediately following each session, participants orally ingested 3 g cellulose placebo (PLC), l-leucine (LEU), or ursolic acid (UA). Blood samples were obtained pre-exercise and at 0.5, 2, and 6 hours postexercise. Muscle biopsies were obtained pre-exercise and at 2 and 6 hours postexercise. RESULTS Plasma leucine increased in LEU at 2 hours postexercise compared to PLC (p = 0.04). Plasma ursolic acid increased in UA at 2 h and 6 hours postexercise compared to PLC and LEU (p < 0.003). No significant differences were observed for serum insulin (p = 0.98) and IGF-1 (p = 0.99) or skeletal muscle IGF-1 receptor (IGF-1R; p = 0.84), Akt (p = 0.55), mTOR (p = 0.09), and p70S6K (p = 0.98). Skeletal muscle IGF-1 was significantly increased in LEU at 2 hours postexercise (p = 0.03) and 6 hours postexercise (p = 0.04) compared to PLC and UA. CONCLUSION Three grams of l-leucine and ursolic acid had no effect on Akt/mTORC1 signaling or serum insulin or IGF-1; however, l-leucine increased skeletal muscle IGF-1 concentration in resistance-trained men.
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Affiliation(s)
- David D Church
- a Exercise and Biochemical Nutrition Lab, Department of Health , Human Performance, and Recreation, College of Arts and Sciences, Baylor University , Waco , Texas
| | - Neil A Schwarz
- a Exercise and Biochemical Nutrition Lab, Department of Health , Human Performance, and Recreation, College of Arts and Sciences, Baylor University , Waco , Texas
| | - Mike B Spillane
- a Exercise and Biochemical Nutrition Lab, Department of Health , Human Performance, and Recreation, College of Arts and Sciences, Baylor University , Waco , Texas
| | - Sarah K McKinley-Barnard
- a Exercise and Biochemical Nutrition Lab, Department of Health , Human Performance, and Recreation, College of Arts and Sciences, Baylor University , Waco , Texas
| | - Tom L Andre
- a Exercise and Biochemical Nutrition Lab, Department of Health , Human Performance, and Recreation, College of Arts and Sciences, Baylor University , Waco , Texas
| | - Alejandro J Ramirez
- b Mass Spectrometry Center , College of Arts and Sciences, Baylor University , Waco , Texas
| | - Darryn S Willoughby
- a Exercise and Biochemical Nutrition Lab, Department of Health , Human Performance, and Recreation, College of Arts and Sciences, Baylor University , Waco , Texas
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Close GL, Hamilton DL, Philp A, Burke LM, Morton JP. New strategies in sport nutrition to increase exercise performance. Free Radic Biol Med 2016; 98:144-158. [PMID: 26855422 DOI: 10.1016/j.freeradbiomed.2016.01.016] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/19/2016] [Accepted: 01/21/2016] [Indexed: 02/03/2023]
Abstract
Despite over 50 years of research, the field of sports nutrition continues to grow at a rapid rate. Whilst the traditional research focus was one that centred on strategies to maximise competition performance, emerging data in the last decade has demonstrated how both macronutrient and micronutrient availability can play a prominent role in regulating those cell signalling pathways that modulate skeletal muscle adaptations to endurance and resistance training. Nonetheless, in the context of exercise performance, it is clear that carbohydrate (but not fat) still remains king and that carefully chosen ergogenic aids (e.g. caffeine, creatine, sodium bicarbonate, beta-alanine, nitrates) can all promote performance in the correct exercise setting. In relation to exercise training, however, it is now thought that strategic periods of reduced carbohydrate and elevated dietary protein intake may enhance training adaptations whereas high carbohydrate availability and antioxidant supplementation may actually attenuate training adaptation. Emerging evidence also suggests that vitamin D may play a regulatory role in muscle regeneration and subsequent hypertrophy following damaging forms of exercise. Finally, novel compounds (albeit largely examined in rodent models) such as epicatechins, nicotinamide riboside, resveratrol, β-hydroxy β-methylbutyrate, phosphatidic acid and ursolic acid may also promote or attenuate skeletal muscle adaptations to endurance and strength training. When taken together, it is clear that sports nutrition is very much at the heart of the Olympic motto, Citius, Altius, Fortius (faster, higher, stronger).
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Affiliation(s)
- G L Close
- Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores University, Tom Reilly Building, Byrom Street, Liverpool L3 3AF, United Kingdom.
| | - D L Hamilton
- Health and Exercise Sciences Research Group, University of Stirling, Stirling, United Kingdom
| | - A Philp
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - L M Burke
- Sports Nutrition, Australian Institute of Sport, Canberra, ACT, Australia; Mary Mackillop Institute for Health Research, Melbourne, Australia
| | - J P Morton
- Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores University, Tom Reilly Building, Byrom Street, Liverpool L3 3AF, United Kingdom
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Ogasawara R, Fujita S, Hornberger TA, Kitaoka Y, Makanae Y, Nakazato K, Naokata I. The role of mTOR signalling in the regulation of skeletal muscle mass in a rodent model of resistance exercise. Sci Rep 2016; 6:31142. [PMID: 27502839 PMCID: PMC4977552 DOI: 10.1038/srep31142] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 07/14/2016] [Indexed: 12/13/2022] Open
Abstract
Resistance exercise (RE) activates signalling by the mammalian target of rapamycin (mTOR), and it has been suggested that rapamycin-sensitive mTOR signalling controls RE-induced changes in protein synthesis, ribosome biogenesis, autophagy, and the expression of peroxisome proliferator gamma coactivator 1 alpha (PGC-1α). However, direct evidence to support the aforementioned relationships is lacking. Therefore, in this study, we investigated the role of rapamycin-sensitive mTOR in the RE-induced activation of muscle protein synthesis, ribosome biogenesis, PGC-1α expression and hypertrophy. The results indicated that the inhibition of rapamycin-sensitive mTOR could prevent the induction of ribosome biogenesis by RE, but it only partially inhibited the activation of muscle protein synthesis. Likewise, the inhibition of rapamycin-sensitive mTOR only partially blocked the hypertrophic effects of chronic RE. Furthermore, both acute and chronic RE promoted an increase in PGC-1α expression and these alterations were not affected by the inhibition of rapamycin-sensitive mTOR. Combined, the results from this study not only establish that rapamycin-sensitive mTOR plays an important role in the RE-induced activation of protein synthesis and the induction of hypertrophy, but they also demonstrate that additional (rapamycin-sensitive mTOR-independent) mechanisms contribute to these fundamentally important events.
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Affiliation(s)
- Riki Ogasawara
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
- Department of Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Satoshi Fujita
- Department of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Troy A. Hornberger
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Yu Kitaoka
- Department of Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yuhei Makanae
- Department of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
| | - Koichi Nakazato
- Department of exercise physiology, Nippon Sport Science University, Tokyo, Japan
| | - Ishii Naokata
- Department of Life Sciences, The University of Tokyo, Tokyo, Japan
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Triterpenes in cancer: significance and their influence. Mol Biol Rep 2016; 43:881-96. [PMID: 27344437 DOI: 10.1007/s11033-016-4032-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 06/20/2016] [Indexed: 01/11/2023]
Abstract
Natural products are enriched with numerous compounds with a broad spectrum of therapeutics indication suggesting the role of functional moieties as a core pharmacophore. This review highlights the role of triterpene in targeting signaling pathways in cancer. Advancement in cellular, biochemical, experimental, and computational approaches provides new insights into various pathways in cancer. In signaling network, triterpenes primarily target membrane receptors which control and modulates expression level of the biological responses. Triterpenes are immunomodulatory targeting nuclear factor kappa B, toll-like receptors, signal transducer and activator of transcription 3, and PI3K/Akt/mTOR. Triterpenes isolated from plants and fungus mainly focus on the process of apoptosis while other signaling areas in the cancer are still shrouded. Some of the triterpenes have already passed the clinical trial, whereas many more have been proven to yield effective results. This review would help the researchers to study the role of triterpenes in cancer, thus, helping them to discover and design efficacious therapeutics agents.
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Bond P. Regulation of mTORC1 by growth factors, energy status, amino acids and mechanical stimuli at a glance. J Int Soc Sports Nutr 2016; 13:8. [PMID: 26937223 PMCID: PMC4774173 DOI: 10.1186/s12970-016-0118-y] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 02/18/2016] [Indexed: 12/05/2022] Open
Abstract
The mechanistic/mammalian target of rapamycin complex 1 (mTORC1) plays a pivotal role in the regulation of skeletal muscle protein synthesis. Activation of the complex leads to phosphorylation of two important sets of substrates, namely eIF4E binding proteins and ribosomal S6 kinases. Phosphorylation of these substrates then leads to an increase in protein synthesis, mainly by enhancing translation initiation. mTORC1 activity is regulated by several inputs, such as growth factors, energy status, amino acids and mechanical stimuli. Research in this field is rapidly evolving and unraveling how these inputs regulate the complex. Therefore this review attempts to provide a brief and up-to-date narrative on the regulation of this marvelous protein complex. Additionally, some sports supplements which have been shown to regulate mTORC1 activity are discussed.
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Affiliation(s)
- Peter Bond
- PeterBond.nl, Waterhoenlaan 25, Zeist, Netherlands
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Kashyap D, Tuli HS, Sharma AK. Ursolic acid (UA): A metabolite with promising therapeutic potential. Life Sci 2016; 146:201-13. [PMID: 26775565 DOI: 10.1016/j.lfs.2016.01.017] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 01/11/2016] [Accepted: 01/12/2016] [Indexed: 12/12/2022]
Abstract
Plants are known to produce a variety of bioactive metabolites which are being used to cure various life threatening and chronic diseases. The molecular mechanism of action of such bioactive molecules, may open up new avenues for the scientific community to develop or improve novel therapeutic approaches to tackle dreadful diseases such as cancer and cardiovascular and neurodegenerative disorders. Ursolic acid (UA) is one among the categories of such plant-based therapeutic metabolites having multiple intracellular and extracellular targets that play role in apoptosis, metastasis, angiogenesis and inflammatory processes. Moreover, the synthetic derivatives of UA have also been seen to be involved in a range of pharmacological applications, which are associated with prevention of diseases. Evidences suggest that UA could be used as a potential candidate to develop a comprehensive competent strategy towards the treatment and prevention of health disorders. The review article herein describes the possible therapeutic effects of UA along with putative mechanism of action.
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Affiliation(s)
- Dharambir Kashyap
- Department of Medical Microbiology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, Punjab 160012, India
| | - Hardeep Singh Tuli
- Department of Biotechnology, Maharishi Markandeshwar University, Mullana, Ambala, Haryana 133207, India.
| | - Anil K Sharma
- Department of Biotechnology, Maharishi Markandeshwar University, Mullana, Ambala, Haryana 133207, India
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Makanae Y, Ogasawara R, Sato K, Takamura Y, Matsutani K, Kido K, Shiozawa N, Nakazato K, Fujita S. Acute bout of resistance exercise increases vitamin D receptor protein expression in rat skeletal muscle. Exp Physiol 2015; 100:1168-76. [DOI: 10.1113/ep085207] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 08/14/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Yuhei Makanae
- Ritsumeikan Global Innovation Research Organization; Ritsumeikan University; Kusatsu Shiga Japan
| | - Riki Ogasawara
- Department of Life Sciences; Graduate School of Arts and Sciences; The University of Tokyo; Tokyo Japan
| | - Koji Sato
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Shiga Japan
| | - Yusuke Takamura
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Shiga Japan
| | - Kenji Matsutani
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Shiga Japan
| | - Kohei Kido
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Shiga Japan
| | - Naruhiro Shiozawa
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Shiga Japan
| | - Koichi Nakazato
- Graduate School of Health and Sport Science; Nippon Sport Science University; Tokyo Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science; Ritsumeikan University; Kusatsu Shiga Japan
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Kido K, Sato K, Makanae Y, Ato S, Hayashi T, Fujita S. Herbal supplement Kamishimotsuto augments resistance exercise-induced mTORC1 signaling in rat skeletal muscle. Nutrition 2015; 32:108-13. [PMID: 26423232 DOI: 10.1016/j.nut.2015.06.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 05/12/2015] [Accepted: 06/30/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Kamishimotsuto (KST) is a supplement containing 13 different herbs including Phellodendron bark, Anemarrhena rhizome and ginseng that have been shown to activate mammalian target of rapamycin complex 1 (mTORC1) and thereby increase muscle protein synthesis in vitro. However, the combined effect of KST and resistance exercise on muscle protein anabolism has not been investigated in vivo. Therefore, the purpose of this study was to investigate the effect of KST supplementation, resistance exercise on (mTORC1) signaling and subsequent muscle protein synthesis. METHODS Male Sprague-Dawley rats were divided into two groups: one group received KST (500 mg/kg/d in water) and the other group received placebo (PLA) for 7 d. After 12 h of fasting, the right gastrocnemius muscle was isometrically exercised via percutaneous electrical stimulation. Muscle samples were analyzed for muscle protein synthesis (MPS) and by western blotting analysis to assess the phosphorylation of p70S6K (Thr389), rpS6 (Ser240/244), and Akt (Ser473 and Thr308). RESULTS KST supplementation for 7 d significantly increased basal p-Akt (Ser473) levels compared with PLA, phosphorylation of the signaling proteins and MPS at baseline were otherwise unaffected. p-p70S6K and p-rpS6 levels significantly increased 1 h and 3 h after exercise in the PLA group, and these elevations were augmented in the KST group (P < 0.05). Furthermore, MPS at 6 h after resistance exercise was greater in the KST group than in the PLA group (P < 0.05). CONCLUSIONS While resistance exercise alone was able to increase p70S6K and rpS6 phosphorylation, Kamishimotsuto supplementation further augmented resistance exercise-induced muscle protein synthesis through mTORC1 signaling.
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Affiliation(s)
- Kohei Kido
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Koji Sato
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Yuhei Makanae
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Satoru Ato
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Tadahiro Hayashi
- R&D Center, Kobayashi Pharmaceutical Co., Ltd., Ibaraki, Osaka, Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan.
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Zhou Z, Tong HHY, Li L, Shek FLY, Lv Y, Zheng Y. Synthesis, characterization and thermal analysis of ursolic acid solid forms. CRYSTAL RESEARCH AND TECHNOLOGY 2015. [DOI: 10.1002/crat.201500034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhengzheng Zhou
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences, University of Macau, Macao SAR; China
| | - Henry H. Y. Tong
- School of Health Sciences; Macao Polytechnic Institute, Macao SAR; China
| | - Liang Li
- Department of Forensic Medicine, Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou China
| | - Fanny L. Y. Shek
- Material Characterization and Preparation Facility; Hong Kong Uni versity of Science and Technology, Hong Kong SAR; China
| | - Yang Lv
- Beijing Key Laboratory of Polymorphic Drugs, Institute of Materia Medica; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
| | - Ying Zheng
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences, University of Macau, Macao SAR; China
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Adams CM, Ebert SM, Dyle MC. Use of mRNA expression signatures to discover small molecule inhibitors of skeletal muscle atrophy. Curr Opin Clin Nutr Metab Care 2015; 18:263-8. [PMID: 25807353 PMCID: PMC5512448 DOI: 10.1097/mco.0000000000000159] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
PURPOSE OF REVIEW Here, we discuss a recently developed experimental strategy for discovering small molecules with potential to prevent and treat skeletal muscle atrophy. RECENT FINDINGS Muscle atrophy involves and requires widespread changes in skeletal muscle gene expression, which generate complex but measurable patterns of positive and negative changes in skeletal muscle mRNA levels (a.k.a. mRNA expression signatures of muscle atrophy). Many bioactive small molecules generate their own characteristic mRNA expression signatures, and by identifying small molecules whose signatures approximate mirror images of muscle atrophy signatures, one may identify small molecules with potential to prevent and/or reverse muscle atrophy. Unlike a conventional drug discovery approach, this strategy does not rely on a predefined molecular target but rather exploits the complexity of muscle atrophy to identify small molecules that counter the entire spectrum of pathological changes in atrophic muscle. We discuss how this strategy has been used to identify two natural compounds, ursolic acid and tomatidine, that reduce muscle atrophy and improve skeletal muscle function. SUMMARY Discovery strategies based on mRNA expression signatures can elucidate new approaches for preserving and restoring muscle mass and function.
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Affiliation(s)
- Christopher M. Adams
- Department of Internal Medicine, Department of Molecular Physiology and Biophysics, and the Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, The University of Iowa, Iowa City
- Iowa City Veterans Affairs Medical Center, Iowa City
- Emmyon, Inc., Coralville, Iowa, USA
| | - Scott M. Ebert
- Department of Internal Medicine, Department of Molecular Physiology and Biophysics, and the Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, The University of Iowa, Iowa City
- Emmyon, Inc., Coralville, Iowa, USA
| | - Michael C. Dyle
- Department of Internal Medicine, Department of Molecular Physiology and Biophysics, and the Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, The University of Iowa, Iowa City
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Kim M, Sung B, Kang YJ, Kim DH, Lee Y, Hwang SY, Yoon JH, Yoo MA, Kim CM, Chung HY, Kim ND. The combination of ursolic acid and leucine potentiates the differentiation of C2C12 murine myoblasts through the mTOR signaling pathway. Int J Mol Med 2015; 35:755-62. [PMID: 25529824 DOI: 10.3892/ijmm.2014.2046] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 12/08/2014] [Indexed: 11/06/2022] Open
Abstract
Aging causes phenotypic changes in skeletal muscle progenitor cells that lead to the progressive loss of myogenic differentiation and thus a decrease in muscle mass. The naturally occurring triterpene, ursolic acid, has been reported to be an effective agent for the prevention of muscle loss by suppressing degenerative muscular dystrophy. Leucine, a branched-chain amino acid, and its metabolite, β-hydroxy-β-methylbutyric acid, have been reported to enhance protein synthesis in skeletal muscle. Therefore, the aim of the present study was to investigate whether the combination of ursolic acid and leucine promotes greater myogenic differentiation compared to either agent alone in C2C12 murine myoblasts. Morphological changes were observed and creatine kinase (CK) activity analysis was performed to determine the conditions through which the combination of ursolic acid and leucine would exert the most prominent effects on muscle cell differentiation. The effect of the combination of ursolic acid and leucine on the expression of myogenic differentiation marker genes was examined by RT-PCR and western blot analysis. The combination of ursolic acid (0.5 µM) and leucine (10 µM) proved to be the most effective in promoting myogenic differentiation. The combination of ursolic acid and leucine significantly increased CK activity than treatment with either agent alone. The level of myosin heavy chain, a myogenic differentiation marker protein, was also enhanced by the combination of ursolic acid and leucine. The combination of ursolic acid and leucine significantly induced the expression of myogenic differentiation marker genes, such as myogenic differentiation 1 (MyoD) and myogenin, at both the mRNA and protein level. In addition, the number of myotubes and the fusion index were increased. These findings indicate that the combination of ursolic acid and leucine promotes muscle cell differentiation, thus suggesting that this combination of agents may prove to be beneficial in increasing muscle mass.
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Affiliation(s)
- Minjung Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Bokyung Sung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Yong Jung Kang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Dong Hwan Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Yujin Lee
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Seong Yeon Hwang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Jeong-Hyun Yoon
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Mi-Ae Yoo
- Department of Molecular Biology, Pusan National University, Busan 609‑735, Republic of Korea
| | - Cheol Min Kim
- Research Center for Anti‑Aging Technology Development, Pusan National University, Busan 609‑735, Republic of Korea
| | - Hae Young Chung
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
| | - Nam Deuk Kim
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 609‑735, Republic of Korea
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Bang HS, Seo DY, Chung YM, Oh KM, Park JJ, Arturo F, Jeong SH, Kim N, Han J. Ursolic Acid-induced elevation of serum irisin augments muscle strength during resistance training in men. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2014; 18:441-6. [PMID: 25352765 PMCID: PMC4211129 DOI: 10.4196/kjpp.2014.18.5.441] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 09/19/2014] [Accepted: 09/25/2014] [Indexed: 12/29/2022]
Abstract
Ursolic acid (UA), a type of pentacyclic triterpenoid carboxylic acid purified from natural plants, can promote skeletal muscle development. We measured the effect of resistance training (RT) with/without UA on skeletal muscle development and related factors in men. Sixteen healthy male participants (age, 29.37±5.14 years; body mass index=27.13±2.16 kg/m2) were randomly assigned to RT (n=7) or RT with UA (RT+UA, n=9) groups. Both groups completed 8 weeks of intervention consisting of 5 sets of 26 exercises, with 10~15 repetitions at 60~80% of 1 repetition maximum and a 60~90-s rest interval between sets, performed 6 times/week. UA or placebo was orally ingested as 1 capsule 3 times/day for 8 weeks. The following factors were measured pre-and post-intervention: body composition, insulin, insulin-like growth factor-1 (IGF-1), irisin, and skeletal muscle strength. Body fat percentage was significantly decreased (p<0.001) in the RT+UA group, despite body weight, body mass index, lean body mass, glucose, and insulin levels remaining unchanged. IGF-1 and irisin were significantly increased compared with baseline levels in the RT+UA group (p<0.05). Maximal right and left extension (p<0.01), right flexion (p<0.05), and left flexion (p<0.001) were significantly increased compared with baseline levels in the RT+UA group. These findings suggest that UA-induced elevation of serum irisin may be useful as an agent for the enhancement of skeletal muscle strength during RT.
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Affiliation(s)
- Hyun Seok Bang
- Division of Humanities and Social Science, POSTECH, Pohang 790-784, Korea
| | - Dae Yun Seo
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 614-735, Korea
| | - Yong Min Chung
- Department of Physical Education, Tongmyong University, Busan 608-711, Korea
| | - Kyoung-Mo Oh
- Department of Physical Education, Pukyong University, Busan 608-737, Korea
| | - Jung Jun Park
- Division of Sport Science, Pusan National University, Busan 609-735, Korea
| | - Figueroa Arturo
- Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee FL 32306, USA
| | - Seung-Hun Jeong
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 614-735, Korea
| | - Nari Kim
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 614-735, Korea
| | - Jin Han
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 614-735, Korea
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Ogasawara R, Sato K, Matsutani K, Nakazato K, Fujita S. The order of concurrent endurance and resistance exercise modifies mTOR signaling and protein synthesis in rat skeletal muscle. Am J Physiol Endocrinol Metab 2014; 306:E1155-62. [PMID: 24691029 DOI: 10.1152/ajpendo.00647.2013] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Concurrent training, a combination of endurance (EE) and resistance exercise (RE) performed in succession, may compromise the muscle hypertrophic adaptations induced by RE alone. However, little is known about the molecular signaling interactions underlying the changes in skeletal muscle adaptation during concurrent training. Here, we used an animal model to investigate whether EE before or after RE affects the molecular signaling associated with muscle protein synthesis, specifically the interaction between RE-induced mammalian target of rapamycin complex 1 (mTORC1) signaling and EE-induced AMP-activated protein kinase (AMPK) signaling. Male Sprague-Dawley rats were divided into five groups: an EE group (treadmill, 25 m/min, 60 min), an RE group (maximum isometric contraction via percutaneous electrical stimulation for 3 × 10 s, 5 sets), an EE before RE group, an EE after RE group, and a nonexercise control group. Phosphorylation of p70S6K, a marker of mTORC1 activity, was significantly increased 3 h after RE in both the EE before RE and EE after RE groups, but the increase was smaller in latter. Furthermore, protein synthesis was greatly increased 6 h after RE in the EE before RE group. Increases in the phosphorylation of AMPK and Raptor were observed only in the EE after RE group. Akt and mTOR phosphorylation were increased in both groups, with no between-group differences. Our results suggest that the last bout of exercise dictates the molecular responses and that mTORC1 signaling induced by any prior bout of RE may be downregulated by a subsequent bout of EE.
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Affiliation(s)
- Riki Ogasawara
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan; The Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga, Japan;
| | - Koji Sato
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan; Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, Shiga, Japan; and
| | - Kenji Matsutani
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Koichi Nakazato
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Satoshi Fujita
- Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan
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The role of mTORC1 in regulating protein synthesis and skeletal muscle mass in response to various mechanical stimuli. Rev Physiol Biochem Pharmacol 2013; 166:43-95. [PMID: 24442322 DOI: 10.1007/112_2013_17] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Skeletal muscle plays a fundamental role in mobility, disease prevention, and quality of life. Skeletal muscle mass is, in part, determined by the rates of protein synthesis, and mechanical loading is a major regulator of protein synthesis and skeletal muscle mass. The mammalian/mechanistic target of rapamycin (mTOR), found in the multi-protein complex, mTORC1, is proposed to play an essential role in the regulation of protein synthesis and skeletal muscle mass. The purpose of this review is to examine the function of mTORC1 in relation to protein synthesis and cell growth, the current evidence from rodent and human studies for the activation of mTORC1 signaling by different types of mechanical stimuli, whether mTORC1 signaling is necessary for changes in protein synthesis and skeletal muscle mass that occur in response to different types of mechanical stimuli, and the proposed molecular signaling mechanisms that may be responsible for the mechanical activation of mTORC1 signaling.
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