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Rahmati M, Shariatzadeh Joneydi M, Koyanagi A, Yang G, Ji B, Won Lee S, Keon Yon D, Smith L, Il Shin J, Li Y. Resistance training restores skeletal muscle atrophy and satellite cell content in an animal model of Alzheimer's disease. Sci Rep 2023; 13:2535. [PMID: 36781881 PMCID: PMC9925431 DOI: 10.1038/s41598-023-29406-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/03/2023] [Indexed: 02/15/2023] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease, and numerous recent findings suggest that several pathologic signs, including loss of muscle strength and mass, are also detected in these patients. In the present study, we evaluated muscle cross-sectional area (CSA), myonuclear number, satellite cell (SC) content, and myosin heavy chain (MyHC) types in an animal model of AD and examined the possible role of resistance training in controlling skeletal muscle size in this disease. Fifty-eight male rats were randomly divided into four groups: healthy-control (H-C), healthy-exercise (H-Ex), Alzheimer-control (A-C), and Alzheimer-exercise (A-Ex). AD was induced by the single injection of 1-42 amyloid into the CA1 region of the hippocampus (1 μl/site). The rats in H-Ex and A-Ex groups performed a 5-week resistance training period (17 sessions). The results indicated that AD induces significant skeletal muscle atrophy and reduces the myonuclear number and SC content in gastrocnemius muscle in both whole muscle cross-sections and isolated myofibers. Interestingly, we did not find any significant differences in the different MyHC distributions of AD animals compared with controls, while resistance training significantly increased the CSA of MyHC IIb fibers in both AD and healthy animals. Altogether, these observations suggest that the skeletal muscle of AD animals are more prone to atrophy and loss of myonuclear number and satellite cell content, while resistance training successfully restores these impairments.
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Affiliation(s)
- Masoud Rahmati
- Department of Physical Education and Sport Sciences, Faculty of Literature and Human Sciences, Lorestan University, Khorramabad, Iran.
| | | | - Ai Koyanagi
- Parc Sanitari Sant Joan de Deu/CIBERSAM, ISCIII, Universitat de Barcelona, Fundacio Sant Joan de Deu, Sant Boi de Llobregat, Barcelona, Spain
- ICREA (Catalan Institution for Research and Advanced Studies), Barcelona, Spain
| | - Guang Yang
- Deparment of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Bingzhou Ji
- Deparment of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Seung Won Lee
- Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Dong Keon Yon
- Medical Science Research Institute, Kyung Hee University College of Medicine, Seoul, Republic of Korea
- Department of Pediatrics, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea
| | - Lee Smith
- Centre for Health, Performance, and Wellbeing, Anglia Ruskin University, Cambridge, UK
| | - Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yusheng Li
- Deparment of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China.
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Qatamish MA, Al-Nassan SM, Kondo H, Fujino H. Protective effects of low-intensity exercise on metabolic oxidative capacity and capillarization in skeletal muscle of non-obese diabetic rats. Biomed Res 2021; 41:227-236. [PMID: 33071258 DOI: 10.2220/biomedres.41.227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Diabetes mellitus induces skeletal muscle dysfunction, such as decreased metabolic activity and capillarization. This study aimed to investigate the effects of aerobic low intensity exercise training on metabolic oxidative capacity and capillarization in skeletal muscle of non-obese diabetic rats. Eleven to twenty-five week-old male non-obese Spontaneous Diabetic Torii (SDT) rats (n = 11) and age-matched healthy male Sprague-Dawley SD rats (n = 11) were randomly assigned to either exercise or sedentary groups. The exercise training was performed on a low-speed motorized treadmill (15 m min-1) for 60 min per session, 5 sessions per week for 14 weeks in exercised groups. Sedentary SDT rats resulted in hyperglycemia, reduction of metabolic oxidative enzyme, and low percentage of oxidative fibers in the skeletal muscles. The low-intensity exercise training inhibited the growth-related increase in glucose level, and increased the muscle oxidative enzyme in exercised SDT rats compared with sedentary SDT rats. In addition, the exercise program prevented capillary regression in the skeletal muscle of diabetic rats. These results suggest that low-intensity exercise training may be an effective treatment to counter the detrimental effects of type 2 diabetes mellitus on the oxidative capacity and the capillary network of skeletal muscles.
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Affiliation(s)
| | - Saad M Al-Nassan
- Department of Physical and Occupational Therapy, The Hashemite University
| | - Hiroyo Kondo
- Rehabilitation Science, Graduate School of Health Sciences, Kobe University
| | - Hidemi Fujino
- Rehabilitation Science, Graduate School of Health Sciences, Kobe University
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NAKAMOTO I, ISHIHARA A. Effects of Voluntary Running Exercise on Skeletal Muscle Properties in Nonobese Rats with Type 2 Diabetes. Physiol Res 2020; 69:73-84. [DOI: 10.33549/physiolres.934178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The skeletal muscles of animals and humans with type 2 diabetes have decreased oxidative capacity. Aerobic exercise can improve muscle oxidative capacity, but no data are available on the amount of exercise required. We investigated the effects of voluntary running exercise and running distance on the skeletal muscle properties of nonobese rats with type 2 diabetes. Six-week-old male diabetic Goto-Kakizaki rats were divided into nonexercised (GK) and exercised (GK-Ex) groups. The rats in the GK-Ex group were permitted voluntary running exercise on wheels for 6 weeks. Age-matched male Wistar rats (WR) were used as nondiabetic controls. Fasting blood glucose and HbA1c levels were higher in the GK and GK-Ex groups than in the WR group and lower in the GK-Ex group than in the GK group. Succinate dehydrogenase (SDH) activity and peroxisome proliferator-activated receptor γ coactivator-1α (Pgc-1α) mRNA levels in the soleus and plantaris muscles were higher in the WR and GK-Ex groups than in the GK group. HbA1c and total cholesterol levels were negatively correlated with running distance and SDH activity and Pgc-1α mRNA levels in the soleus muscle were positively correlated with running distance. The onset and progression of diabetes in nonobese diabetic rats were effectively inhibited by running longer distances.
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Affiliation(s)
- I. NAKAMOTO
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - A. ISHIHARA
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
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Abstract
Adequate oxygen supply by exposure to mild hyperbaric oxygen at appropriately high atmospheric pressure (1266-1317 hPa) and increased oxygen concentration (35-40% oxygen) has a possibility of improving the oxidative metabolism in cells and tissues without barotrauma and excessive production of reactive oxygen species. Therefore, metabolic syndrome and lifestyle-related diseases, including type 2 diabetes and hypertension, in rats were inhibited and/or improved by exposure to mild hyperbaric oxygen. It accelerated the growth-induced increase in oxidative capacity of the skeletal muscle in rats and inhibited the age-related decrease in oxidative capacity of the skeletal muscle in mice. A decrease in dopaminergic neurons in the substantia nigra of mice with Parkinson's disease was inhibited by exposure to mild hyperbaric oxygen. This review describes the beneficial effects of exposure to mild hyperbaric oxygen on some metabolic diseases and their perspectives.
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Affiliation(s)
- Akihiko Ishihara
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
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Nagatomo F, Takemura A, Roy RR, Fujino H, Kondo H, Ishihara A. Mild hyperbaric oxygen inhibits the growth-related decline in skeletal muscle oxidative capacity and prevents hyperglycemia in rats with type 2 diabetes mellitus. J Diabetes 2018; 10:753-763. [PMID: 29633563 DOI: 10.1111/1753-0407.12666] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Humans and animals with type 2 diabetes mellitus (T2DM) exhibit low skeletal muscle oxidative capacity and impaired glucose metabolism. The aim of the present study was to investigate the effects of exposure to mild hyperbaric oxygen on these changes in obese rats with T2DM. METHODS Five-week-old non-diabetic Long-Evans Tokushima Otsuka (LETO) and diabetic Otsuka Long-Evans Tokushima Fatty (OLETF) rats were divided into normobaric (LETO-NB and OLETF-NB) and mild hyperbaric oxygen (LETO-MHO and OLETF-MHO) groups. The LETO-MHO and OLETF-MHO groups received 1266 hPa with 36% oxygen for 3 h daily for 22 weeks. RESULTS Fasting and non-fasting blood glucose, HbA1c, and triglyceride levels were lower in the OLETF-MHO group than in the OLETF-NB group (P < 0.05). In the soleus muscle, peroxisome proliferator-activated receptor δ/β (Pparδ/β), Pparγ, and PPARγ coactivator-1α (Pgc-1α) mRNA levels were lower in the OLETF-NB group than in all other groups (P < 0.05), whereas myogenin (Myog) and myogenic factor 5 (Myf5) mRNA levels were higher in the OLETF-MHO group than in the LETO-NB and OLETF-NB groups (P < 0.05). The soleus muscles in the OLETF-NB group contained only low-oxidative Type I fibers, whereas those in all other groups contained high-oxidative Type IIA and Type IIC fibers in addition to Type I fibers. CONCLUSIONS Exposure to mild hyperbaric oxygen inhibits the decline in skeletal muscle oxidative capacity and prevents the hyperglycemia associated with T2DM. Pgc-1α, Myog, and Myf5 mRNA levels appear to be closely associated with skeletal muscle oxidative capacity in rats with T2DM.
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Affiliation(s)
- Fumiko Nagatomo
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Ai Takemura
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Roland R Roy
- Department of Integrative Biology and Physiology and Brain Research Institute, University of California, Los Angeles, California, USA
| | - Hidemi Fujino
- Division of Rehabilitation Sciences, Graduate School of Health Sciences, Kobe University, Kobe, Japan
| | - Hiroyo Kondo
- Department of Food Sciences and Nutrition, Nagoya Women's University, Nagoya, Japan
| | - Akihiko Ishihara
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
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Takemura A, Ishihara A. Mild Hyperbaric Oxygen Inhibits Growth-related Decrease in Muscle Oxidative Capacity of Rats with Metabolic Syndrome. J Atheroscler Thromb 2016; 24:26-38. [PMID: 27237220 PMCID: PMC5225130 DOI: 10.5551/jat.34686] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Aim: We examined the effects of mild hyperbaric oxygen on the properties of the soleus muscle in rats with metabolic syndrome. Methods: Five-week-old metabolic syndrome (SHR/NDmcr-cp, cp/cp) rats were divided into normobaric (CP) and mild hyperbaric oxygen (CP-H) groups (n = 5/group). In addition, 5-week-old Wistar rats were assigned as the normobaric control (WR) group (n = 5). The CP-H group was exposed to 1.25 atmospheres absolute with 36% oxygen for 3 h daily for 16 weeks. Succinate dehydrogenase (SDH) activity and mRNA levels of peroxisome proliferator-activated receptor γ coactivator-1α (Pgc-1α) in the soleus muscle were examined. The fiber type composition, cross-sectional areas, and SDH staining intensity in the soleus muscle were also examined. Results: The CP-H group showed lower fasting and nonfasting blood glucose, glycated hemoglobin, total cholesterol, triglyceride, insulin, and systolic blood pressure levels; higher adiponectin levels; and higher SDH activity and mRNA levels of Pgc-1α in the muscle than the CP group. Compared with the CP group, the CP-H group had a lower percentage of type I fibers and observed type IIA fibers in the muscle. The CP-H group also had higher SDH staining intensity of type I and type IIC fibers in the muscle than the CP group. No differences in these values were observed in the muscles of the WR and CP-H groups. Conclusion: Mild hyperbaric oxygen inhibited growth-related increase in blood glucose levels and decrease in muscle oxidative capacity of rats with metabolic syndrome because of improved oxidative metabolism.
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Affiliation(s)
- Ai Takemura
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University
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Takemura A, Ishihara A. Mild Hyperbaric Oxygen Improves Decreased Oxidative Capacity of Spinal Motoneurons Innervating the Soleus Muscle of Rats with Type 2 Diabetes. Neurochem Res 2016; 41:2336-44. [PMID: 27220333 DOI: 10.1007/s11064-016-1947-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 04/23/2016] [Accepted: 05/04/2016] [Indexed: 11/30/2022]
Abstract
Rats with type 2 diabetes exhibit decreased oxidative capacity, such as reduced oxidative enzyme activity, low-intensity staining for oxidative enzymes in fibers, and no high-oxidative type IIA fibers, in the skeletal muscle, especially in the soleus muscle. In contrast, there are no data available concerning the oxidative capacity of spinal motoneurons innervating skeletal muscle of rats with type 2 diabetes. This study examined the oxidative capacity of motoneurons innervating the soleus muscle of non-obese rats with type 2 diabetes. In addition, this study examined the effects of mild hyperbaric oxygen at 1.25 atmospheres absolute with 36 % oxygen for 10 weeks on the oxidative capacity of motoneurons innervating the soleus muscle because mild hyperbaric oxygen improves the decreased oxidative capacity of the soleus muscle in non-obese rats with type 2 diabetes. Spinal motoneurons innervating the soleus muscle were identified using nuclear yellow, a retrograde fluorescent neuronal tracer. Thereafter, the cell body sizes and succinate dehydrogenase activity of identified motoneurons were analyzed. Decreased succinate dehydrogenase activity of small-sized alpha motoneurons innervating the soleus muscle was observed in rats with type 2 diabetes. The decreased succinate dehydrogenase activity of these motoneurons was improved by mild hyperbaric oxygen. Therefore, we concluded that rats with type 2 diabetes have decreased oxidative capacity in motoneurons innervating the soleus muscle and this decreased oxidative capacity is improved by mild hyperbaric oxygen.
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Affiliation(s)
- Ai Takemura
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Akihiko Ishihara
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
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da Silva Aragão R, Guzmán-Quevedo O, Pérez-García G, Toscano AE, Gois Leandro C, Manhães-de-Castro R, Bolaños-Jiménez F. Differential developmental programming by early protein restriction of rat skeletal muscle according to its fibre-type composition. Acta Physiol (Oxf) 2014; 210:70-83. [PMID: 23362831 DOI: 10.1111/apha.12073] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 11/13/2012] [Accepted: 01/25/2013] [Indexed: 12/29/2022]
Abstract
AIMS Differences in fibre-type composition of skeletal muscle have been associated with obesity and insulin resistance. As a poor nutrient environment early in life is a predisposing factor for the development of obesity and related metabolic diseases at adulthood, this study aimed at determining the long-term consequences of maternal undernutrition on the structural and metabolic properties of two skeletal muscles characterized by their different fibre-type composition and metabolic properties. METHODS The fibre-type composition and enzymatic activities of hexokinase (HK), beta-hydroxyacyl-CoA dehydrogenase (β-HAD) and citrate synthase (CS) were measured in soleus and extensor digitorum longus (EDL) muscles from adult rats born to dams fed a control (17% protein) or a low-protein [8% protein (PR)] diet throughout pregnancy and lactation. In addition, the expression levels of several genes regulating glycolysis, fatty acid oxidation and mitochondrial biogenesis were determined by real-time PCR. RESULTS Protein rats exhibited enhanced density of type II fibres along with decreased rate of fatty acid oxidation and glycolysis in soleus but not EDL. Malnourished rats exhibited also a different gene expression profile in soleus and EDL. Altogether, these alterations correspond to a state of energy deficiency and are present in animals which do not show yet any sign of obesity or glucose intolerance. CONCLUSION We conclude that maternal protein restriction alters in the long term the structural and enzymatic properties of offspring skeletal muscle in a fibre-type-dependent manner. These alterations might have a causative role in the development of obesity and related metabolic disorders later in life.
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Affiliation(s)
- R. da Silva Aragão
- INRA; UMR1280 Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; Nantes Atlantique Université; Nantes France
- Departamento de Nutrição; Centro de Ciências da Saúde; Universidade Federal de Pernambuco; Recife Brazil
| | - O. Guzmán-Quevedo
- INRA; UMR1280 Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; Nantes Atlantique Université; Nantes France
| | - G. Pérez-García
- INRA; UMR1280 Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; Nantes Atlantique Université; Nantes France
| | - A. E. Toscano
- Núcleo de Enfermagem; CAV; Universidade Federal de Pernambuco; Vitória de Santo Antão Brazil
| | - C. Gois Leandro
- Núcleo de Educação Física e Ciências do Esporte; CAV; Universidade Federal de Pernambuco; Vitória de Santo Antão Brazil
| | - R. Manhães-de-Castro
- Departamento de Nutrição; Centro de Ciências da Saúde; Universidade Federal de Pernambuco; Recife Brazil
| | - F. Bolaños-Jiménez
- INRA; UMR1280 Physiologie des Adaptations Nutritionnelles; Nantes France
- Université de Nantes; Nantes Atlantique Université; Nantes France
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Nagatomo F, Fujino H, Kondo H, Takeda I, Tsuda K, Ishihara A. High-fat diet-induced reduction of peroxisome proliferator-activated receptor-γ coactivator-1α messenger RNA levels and oxidative capacity in the soleus muscle of rats with metabolic syndrome. Nutr Res 2012; 32:144-51. [PMID: 22348463 DOI: 10.1016/j.nutres.2011.12.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 12/24/2011] [Accepted: 12/30/2011] [Indexed: 01/21/2023]
Abstract
Animal models of type 2 diabetes exhibit reduced peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) messenger RNA (mRNA) levels, which are associated with decreased oxidative capacity, in skeletal muscles. In contrast, animal models with metabolic syndrome show normal PGC-1α mRNA levels. We hypothesized that a high-fat diet decreases PGC-1α mRNA levels in skeletal muscles of rats with metabolic syndrome, reducing muscle oxidative capacity and accelerating metabolic syndrome or inducing type 2 diabetes. We examined mRNA levels and fiber profiles in the soleus muscles of rats with metabolic syndrome (SHR/NDmcr-cp [cp/cp]; CP) fed a high-fat diet. Five-week-old CP rats were assigned to a sedentary group (CP-N) that was fed a standard diet (15.1 kJ/g, 23.6% protein, 5.3% fat, and 54.4% carbohydrates) or a sedentary group (CP-H) that was fed a high-fat diet (21.6 kJ/g, 23.6% protein, 34.9% fat, and 25.9% carbohydrates) and were housed for 10 weeks. Body weight, energy intake, and systolic blood pressure were higher in the CP-H group than in the CP-N group. Nonfasting glucose, triglyceride, total cholesterol, and leptin levels were higher in the CP-H group than in the CP-N group. There was no difference in insulin levels between the CP-N and CP-H groups. Muscle PGC-1α mRNA levels and succinate dehydrogenase activity were lower in the CP-H group than in the CP-N group. We concluded that a high-fat diet reduces PGC-1α mRNA levels and oxidative capacity in skeletal muscles and accelerates metabolic syndrome.
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Affiliation(s)
- Fumiko Nagatomo
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
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Nagatomo F, Fujino H, Kondo H, Kouzaki M, Gu N, Takeda I, Tsuda K, Ishihara A. The effects of running exercise on oxidative capacity and PGC-1α mRNA levels in the soleus muscle of rats with metabolic syndrome. J Physiol Sci 2012; 62:105-14. [PMID: 22234788 PMCID: PMC10717813 DOI: 10.1007/s12576-011-0188-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Accepted: 12/09/2011] [Indexed: 12/16/2022]
Abstract
Skeletal muscles in animals with metabolic syndrome exhibit reduced oxidative capacity. We investigated the effects of running exercise on fiber characteristics, oxidative capacity, and mRNA levels in the soleus muscles of rats with metabolic syndrome [SHR/NDmcr-cp (cp/cp); CP]. We divided 5-week-old CP rats into non-exercise (CP) and exercise (CP-Ex) groups. Wistar-Kyoto rats (WKY) were used as the control group. CP-Ex rats were permitted voluntary exercise on running wheels for 10 weeks. Triglyceride levels were higher and adiponectin levels lower in the CP and CP-Ex groups than in the WKY group. However, triglyceride levels were lower and adiponectin levels higher in the CP-Ex group than in the CP group. The soleus muscles in CP-Ex rats contained only high-oxidative type I fibers, whereas those in WKY and CP rats contained type I, IIA, and IIC fibers. Muscle succinate dehydrogenase (SDH) activity was higher in the CP-Ex group than in the CP group; there was no difference in SDH activity between the WKY and CP-Ex groups. Muscle proliferator-activated receptor γ coactivator-1α (PGC-1α) mRNA levels were higher in the CP-Ex group than in the CP group; there was no difference in PGC-1α mRNA levels between the WKY and CP-Ex groups. In CP-Ex rats, longer running distance was associated with increased muscle SDH activity and PGC-1α mRNA levels. We concluded that running exercise restored decreased muscle oxidative capacity and PGC-1α mRNA levels and improved hypertriglyceridemia in rats with metabolic syndrome.
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Affiliation(s)
- Fumiko Nagatomo
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501 Japan
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, 654-0142 Japan
| | - Hiroyo Kondo
- Department of Food Sciences and Nutrition, Nagoya Women’s University, Nagoya, 467-8610 Japan
| | - Motoki Kouzaki
- Laboratory of Neurophysiology, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501 Japan
| | - Ning Gu
- Department of Life Science and Engineering, Harbin Institute of Technology, Harbin, 15001 China
| | - Isao Takeda
- Department of Physical Therapy, Takarazuka University of Medical and Health Care, Takarazuka, 666-0162 Japan
| | - Kinsuke Tsuda
- Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501 Japan
| | - Akihiko Ishihara
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501 Japan
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Nagatomo F, Roy RR, Takahashi H, Edgerton VR, Ishihara A. Effect of exposure to hyperbaric oxygen on diabetes-induced cataracts in mice. J Diabetes 2011; 3:301-8. [PMID: 21801331 DOI: 10.1111/j.1753-0407.2011.00150.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The growth-associated increase in the blood glucose level of animals with Type 2 diabetes is inhibited by moderate hyperbaric exposure at 1.25 atmospheres absolute (ata) with 36% oxygen, presumably due to an increase in oxidative metabolism. However, there are no data available regarding the effect of moderate hyperbaric oxygen (HBO) on diabetes-induced cataracts. METHODS Four-week-old mice with Type 2 diabetes and cataracts were exposed to 1.25 ata with 36% oxygen, 6 h daily, for 12 weeks, followed by normal conditions at 1 ata with 21% oxygen for 16 weeks (cataract + hyperbaric group). Levels of blood glucose and derivatives of reactive oxygen metabolites (dROMs), used as an index of oxidative stress, and the turbidities of the lenses from these mice at 4, 8, 12, 16, and 32 weeks of age were compared with those of control and diabetic (cataract group) mice not exposed to HBO. RESULTS Non-fasting and fasting blood glucose levels were lower in the cataract + hyperbaric group at 12, 16, and 32 weeks of age than in the age-matched cataract group. The levels of dROMs were lower in the cataract + hyperbaric group at 16 and 32 weeks of age than in the age-matched cataract group. The turbidities of the peripheral and central regions of the lenses were lower in the cataract + hyperbaric group at 12, 16, and 32 weeks of age than in the age-matched cataract group. CONCLUSIONS Hyperbaric exposure at 1.25 ata with 36% oxygen delays cataract development and progression in mice with Type 2 diabetes.
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Affiliation(s)
- Fumiko Nagatomo
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
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Nagatomo F, Fujino H, Kondo H, Gu N, Takeda I, Ishioka N, Tsuda K, Ishihara A. PGC-1α mRNA level and oxidative capacity of the plantaris muscle in rats with metabolic syndrome, hypertension, and type 2 diabetes. Acta Histochem Cytochem 2011; 44:73-80. [PMID: 21614168 PMCID: PMC3096084 DOI: 10.1267/ahc.10041] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 03/02/2011] [Indexed: 11/22/2022] Open
Abstract
We examined the fiber profiles and the mRNA levels of peroxisome proliferator-activated receptors (PPARα and PPARδ/β) and of the PPARγ coactivator-1α (PGC-1α) in the plantaris muscles of 15-week-old control (WR), metabolic syndrome (CP), hypertensive (SHR), and type 2 diabetic (GK) rats. The deep regions in the muscles of SHR and GK rats exhibited lower percentages of high-oxidative type I and IIA fibers and higher percentages of low-oxidative type IIB fibers compared with WR and CP rats. The surface regions in the muscles of CP, SHR, and GK rats exhibited lower percentages of high-oxidative type IIA fibers and higher percentages of low-oxidative type IIB fibers compared with WR rats. The muscles of SHR and GK rats had lower oxidative enzyme activity compared with WR rats. The muscles of SHR rats had the lowest PPARδ/β mRNA level. In addition, the muscles of SHR and GK rats had lower PGC-1α mRNA level compared with WR and CP rats. We concluded that the plantaris muscles of rats with hypertension and type 2 diabetes have lower oxidative capacity, which is associated with the decreased level of PGC-1α mRNA.
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Affiliation(s)
- Fumiko Nagatomo
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences
| | - Hiroyo Kondo
- Department of Food Sciences and Nutrition, Nagoya Women’s University
| | - Ning Gu
- Department of Life Science and Engineering, Harbin Institute of Technology
| | - Isao Takeda
- Department of Physical Therapy, Kinjo University
| | - Noriaki Ishioka
- Department of Space Biology and Microgravity Sciences, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
| | - Kinsuke Tsuda
- Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University
| | - Akihiko Ishihara
- Laboratory of Cell Biology and Life Science, Graduate School of Human and Environmental Studies, Kyoto University
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Nagatomo F, Fujino H, Takeda I, Ishihara A. Effects of Hyperbaric Oxygenation on Blood Pressure Levels of Spontaneously Hypertensive Rats. Clin Exp Hypertens 2010; 32:193-7. [DOI: 10.3109/10641960903254521] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Gu N, Nagatomo F, Fujino H, Takeda I, Tsuda K, Ishihara A. Hyperbaric oxygen exposure improves blood glucose level and muscle oxidative capacity in rats with type 2 diabetes. Diabetes Technol Ther 2010; 12:125-33. [PMID: 20105042 DOI: 10.1089/dia.2009.0104] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The effects of exposure to hyperbaric oxygen on blood glucose level and muscle oxidative capacity in rats with type 2 diabetes were investigated. METHODS Five-week-old male Goto-Kakizaki rats were divided into four groups: normobaric (NN; exposed to 21% oxygen at 760 mm Hg for 8 weeks), hyperbaric to normobaric (HN; exposed to 36% oxygen at 950 mm Hg for 4 weeks, followed by 21% oxygen at 760 mm Hg for 4 weeks), normobaric to hyperbaric (NH; exposed to 21% oxygen at 760 mm Hg for 4 weeks, followed by 36% oxygen at 950 mm Hg for 4 weeks), and hyperbaric (HH; exposed to 36% oxygen at 950 mm Hg for 8 weeks). RESULTS Blood glucose levels were lower in the HN, NH, and HH groups than in the NN group. Up-regulated mRNA expression levels of peroxisome proliferator-activated receptor-gamma co-activator-1alpha were observed in the soleus muscles of the HN, NH, and HH groups and in the plantaris muscles of the HN and HH groups. The soleus muscles of the NN group contained only type I fibers, whereas those of the HN, NH, and HH groups contained type I, type IIA, and type IIC fibers. An increased percentage of type I fibers and a decreased percentage of type IIB fibers were observed in the plantaris muscles of the NH, HN, and HH groups. CONCLUSIONS Exposure to hyperbaric oxygen reduces high blood glucose levels and improves oxidative capacities in the skeletal muscles of rats with diabetes, and these effects are maintained under normobaric conditions even after exposure to hyperbaric oxygen.
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Affiliation(s)
- Ning Gu
- Laboratory of Neurochemistry, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
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15
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Nagatomo F, Gu N, Fujino H, Takeda I, Tsuda K, Ishihara A. Skeletal muscle characteristics of rats with obesity, diabetes, hypertension, and hyperlipidemia. J Atheroscler Thromb 2009; 16:576-85. [PMID: 19763017 DOI: 10.5551/jat.1065] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM Data on the skeletal muscle characteristics of patients and animals with lifestyle-related diseases are limited. We investigated mRNA expression levels and fiber profiles in the skeletal muscles of rats with obesity, diabetes, hypertension, and/or hyperlipidemia. METHODS The mRNA expression levels of peroxisome proliferator-activated receptors (PPARalpha and PPARdelta/beta), PPARgamma coactivator-1alpha (PGC-1alpha), stearoyl-CoA desaturase-1 (SCD-1), carnitine palmi-toyl-transferase I (CPT I), medium-chain acyl-CoA dehydrogenase (MCAD), and mitochondrial transcriptional factor A (TFAM) in the soleus muscles were compared among 15-week-old control (WR), type 2 diabetic (GK), hypertensive (SHR), and hyperlipidemic (CP) rats. The fiber profiles in the soleus muscles of these rats were also determined. RESULTS GK rats showed lower PPARdelta/beta, PGC-1alpha, and MCAD expression levels than WR rats. SHR rats showed higher PPARalpha and MCAD and lower PPARdelta/beta expression levels than WR rats. CP rats showed lower PPARdelta/beta and higher SCD-1 expression levels than WR rats. The muscles of WR, SHR, and CP rats had low-oxidative type I and high-oxidative type IIA and type IIC fibers, whereas the muscle of GK rats had only low-oxidative type I fibers. CONCLUSIONS The skeletal muscles of rats with lifestyle-related diseases have unique mRNA expres-sion patterns and fiber profiles depending on the type of disease. For example, the lower PGC-1alpha and MCAD mRNA expression levels in the soleus muscles of type 2 diabetic rats are associated with the presence of only low-oxidative type I fibers in the muscle.
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Affiliation(s)
- Fumiko Nagatomo
- Laboratory of Neurochemistry, Graduate School of Human and Environmental Studies, Kyoto University, Japan
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16
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Yasuda K, Adachi T, Gu N, Matsumoto A, Matsunaga T, Tsujimoto G, Tsuda K, Ishihara A. Effects of hyperbaric exposure with high oxygen concentration on glucose and insulin levels and skeletal muscle-fiber properties in diabetic rats. Muscle Nerve 2007; 35:337-43. [PMID: 17094100 DOI: 10.1002/mus.20692] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The effects of hyperbaric exposure with high oxygen concentration on glucose and insulin levels and skeletal muscle-fiber properties were investigated in type 2 diabetic Goto-Kakizaki rats. Five-week-old rats were exposed to a hyperbaric environment (1.25 atmospheric pressure) with a high oxygen concentration (36%) for 6 h daily. Glucose and insulin levels and properties including fiber-type distribution, cross-sectional area, and oxidative enzyme activity in the soleus muscle were examined after hyperbaric exposure for 4 weeks. The growth-related increase in glucose level was inhibited by hyperbaric exposure, and insulin also showed lower levels compared with control rats. The percentage of low-oxidative type I fibers in the muscle decreased and high-oxidative type IIA and type IIC fibers, which were not detected in the muscle of control rats, were observed after hyperbaric exposure. The oxidative enzyme activity of type I fibers in the muscle increased after hyperbaric exposure. Hyperbaric exposure with high oxygen concentration might therefore provide a new approach to improve the glucose tolerance, insulin resistance, and altered skeletal muscle metabolism that are caused by diabetes mellitus. Muscle Nerve, 2006.
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MESH Headings
- Adipose Tissue, White/pathology
- Animals
- Blood Glucose/analysis
- Blood Glucose/drug effects
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/therapy
- Energy Metabolism
- Hyperbaric Oxygenation/methods
- Hyperglycemia/prevention & control
- Insulin/blood
- Insulin Resistance
- Male
- Muscle Fibers, Skeletal/drug effects
- Muscle Fibers, Skeletal/enzymology
- Muscle Fibers, Skeletal/pathology
- Muscle, Skeletal/enzymology
- Muscle, Skeletal/pathology
- Muscular Diseases/enzymology
- Muscular Diseases/etiology
- Muscular Diseases/pathology
- Oxidative Phosphorylation
- Oxygen/administration & dosage
- Oxygen/metabolism
- Oxygen Consumption
- Rats
- Rats, Mutant Strains
- Rats, Wistar
- Succinate Dehydrogenase/metabolism
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Affiliation(s)
- Koichiro Yasuda
- Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
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17
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Matsumoto A, Nagatomo F, Yasuda K, Tsuda K, Ishihara A. Hyperbaric Exposure with High Oxygen Concentration Improves Altered Fiber Types in the Plantaris Muscle of Diabetic Goto-Kakizaki Rats. J Physiol Sci 2007; 57:133-6. [PMID: 17349108 DOI: 10.2170/physiolsci.sc000707] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Accepted: 03/09/2007] [Indexed: 11/05/2022]
Abstract
Hyperbaric exposure with high oxygen concentration inhibits a growth-related increase in the glucose and insulin of diabetic rats. In this study, 5-week-old diabetic Goto-Kakizaki rats were exposed to a hyperbaric environment (1.25 atmospheric pressure) with a high oxygen concentration (36%) for 6 h daily. Fiber type distributions and oxidative enzyme activities in the fast-twitch plantaris muscle of Goto-Kakizaki rats were examined after hyperbaric exposure for 4 weeks. The percentages of high-oxidative type I and type IIA fibers increased and that of low-oxidative type IIB fibers decreased after hyperbaric exposure. Furthermore, the fiber oxidative enzyme activity increased after hyperbaric exposure, regardless of fiber type. It is concluded that altered patterns of fiber types in the plantaris muscle of diabetic rats shift toward normal, which is observed in nondiabetic rats, following hyperbaric exposure with high oxygen concentration.
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MESH Headings
- Animals
- Cell Count
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/therapy
- Hyperbaric Oxygenation
- Insulin/blood
- Male
- Muscle Fibers, Fast-Twitch/cytology
- Muscle Fibers, Fast-Twitch/metabolism
- Muscle Fibers, Slow-Twitch/cytology
- Muscle Fibers, Slow-Twitch/metabolism
- Muscle, Skeletal/cytology
- Muscle, Skeletal/enzymology
- Rats
- Rats, Mutant Strains
- Rats, Wistar
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Affiliation(s)
- A Matsumoto
- Laboratory of Neurochemistry, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501 Japan
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18
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Matsumoto A, Nagatomo F, Mori A, Ohira Y, Ishihara A. Cell Size and Oxidative Enzyme Activity of Rat Biceps Brachii and Triceps Brachii Muscles. J Physiol Sci 2007; 57:311-6. [DOI: 10.2170/physiolsci.rp008907] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2007] [Accepted: 10/29/2007] [Indexed: 11/05/2022]
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19
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Adachi T, Kikuchi N, Yasuda K, Anahara R, Gu N, Matsunaga T, Yamamura T, Mori C, Tsujimoto G, Tsuda K, Ishihara A. Fibre type distribution and gene expression levels of both succinate dehydrogenase and peroxisome proliferator-activated receptor-gamma coactivator-1alpha of fibres in the soleus muscle of Zucker diabetic fatty rats. Exp Physiol 2006; 92:449-55. [PMID: 17158179 DOI: 10.1113/expphysiol.2006.035451] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We have reported that a change in muscle fibre type distribution is present in two strains of diabetic rats (Otsuka Long-Evans Tokushima Fatty and Goto-Kakizaki rats). In this study, we determined whether the change in soleus muscle fibre type distribution was caused by diabetes, using obese, diabetic (Zucker diabetic fatty, ZDF), obese, non-diabetic (Zucker fatty, ZF) and non-diabetic, non-obese rats (Zucker lean, ZL). Moreover, we investigated whether the gene expression levels of metabolic key molecules, namely the transcriptional factors of metabolic genes, exemplified by peroxisome proliferator-activated receptor-gamma coactivator-1alpha (PGC-1alpha), and the oxidative enzymes in mitochondria, exemplified by succinate dehydrogenase (SDH), were changed in type I and II muscle fibres in each type of rat, using the new technique of laser capture microdissection (LCM). Both plasma glucose and glucosylated haemoglobin levels were significantly higher in ZDF than in ZL and ZF rats. A lower percentage of type IIA fibres was observed in the muscles of ZDF rats than in those of ZL and ZF rats. The mRNA expression levels of SDH in type II fibres and of PGC-1alpha in type I fibres were significantly lower in ZDF than in ZL and ZF rats as assessed by LCM and real-time PCR analysis. We have shown, for the first time, that a lower percentage of type IIA fibres was observed in ZDF rats. We have also discovered that the expression levels of the oxidative metabolism-related genes, PGC-1alpha and SDH, decreased in type I and type II fibres, respectively, of ZDF rats.
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MESH Headings
- Adipose Tissue/pathology
- Animals
- Blood Glucose/metabolism
- Body Weight
- Diabetes Mellitus/enzymology
- Diabetes Mellitus/genetics
- Diabetes Mellitus/metabolism
- Diabetes Mellitus/pathology
- Disease Models, Animal
- Gene Expression
- Glycated Hemoglobin/metabolism
- Insulin/blood
- Lasers
- Male
- Microdissection/methods
- Muscle Fibers, Fast-Twitch/chemistry
- Muscle Fibers, Fast-Twitch/enzymology
- Muscle Fibers, Skeletal/chemistry
- Muscle Fibers, Skeletal/enzymology
- Muscle Fibers, Skeletal/pathology
- Muscle Fibers, Slow-Twitch/chemistry
- Muscle Fibers, Slow-Twitch/enzymology
- Muscle, Skeletal/chemistry
- Muscle, Skeletal/enzymology
- Muscle, Skeletal/pathology
- Obesity/enzymology
- Obesity/genetics
- Obesity/metabolism
- Obesity/pathology
- Organ Size
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha
- RNA, Messenger/analysis
- RNA-Binding Proteins/analysis
- RNA-Binding Proteins/genetics
- Rats
- Rats, Zucker
- Reverse Transcriptase Polymerase Chain Reaction
- Succinate Dehydrogenase/analysis
- Succinate Dehydrogenase/genetics
- Succinate Dehydrogenase/metabolism
- Transcription Factors/analysis
- Transcription Factors/genetics
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Affiliation(s)
- Tetsuya Adachi
- Department of Genomic Drug Discovery Science, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan.
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20
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Yasuda K, Aoki N, Adachi T, Tsujimoto G, Gu N, Matsunaga T, Kikuchi N, Tsuda K, Ishihara A. Hyperbaric exposure with high oxygen concentration inhibits growth-associated increase in the glucose level of diabetic Goto-Kakizaki rats. Diabetes Obes Metab 2006; 8:714-5. [PMID: 17026499 DOI: 10.1111/j.1463-1326.2005.00555.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Yasuda K, Adachi T, Kikuchi N, Tsujimoto G, Aoki N, Tsuda K, Ishihara A. Effects of running exercise on fibre-type distribution of soleus and plantaris muscles in diabetic Otsuka Long-Evans Tokushima fatty rats. Diabetes Obes Metab 2006; 8:311-21. [PMID: 16634991 DOI: 10.1111/j.1463-1326.2005.00507.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM Effect of running exercise on fibre-type distributions of the slow soleus and fast plantaris muscles was investigated in male Otsuka Long-Evans Tokushima fatty rats (OLETF) as an animal model of spontaneous type 2 diabetes mellitus. METHODS Five-week-old OLETF rats were allowed to exercise voluntarily in running wheels for 32 days and the data were compared with those of age-matched non-exercised OLETF and non-diabetic Long-Evans Tokushima Otsuka rats (LETO). RESULTS In the soleus muscle, a higher percentage of type I fibres was observed in non-exercised OLETF rats compared with LETO rats, and there were no type IIA fibres in non-exercised OLETF rats. In the plantaris muscle, a higher percentage of type IIB fibres and a lower percentage of type I and type IIA fibres were observed in non-exercised OLETF rats compared with LETO rats. In contrast, there were no differences in the fibre-type distribution of soleus and plantaris muscles between exercised OLETF and LETO rats. The body weight and type I fibre percentage of the soleus muscle were related to the running distance in exercised OLETF rats. White adipose tissue weight, HbA(1c) and blood insulin and glucose concentrations were lower in exercised OLETF rats than in non-exercised OLETF rats, irrespective of the running distance. There was a difference in the gene-expression pattern of the soleus muscle among LETO rats, non-exercised OLETF and exercised OLETF rats. CONCLUSION Running exercise can inhibit diabetes-associated type shifting of fibres, which is more apparent with postnatal growth, in skeletal muscles of diabetic OLETF rats, as a result of mRNA expression change in muscle.
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MESH Headings
- Adipose Tissue/pathology
- Animals
- Blood Glucose/metabolism
- Body Weight
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Experimental/physiopathology
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/pathology
- Diabetes Mellitus, Type 2/physiopathology
- Eating
- Glycated Hemoglobin/metabolism
- Insulin/blood
- Male
- Motor Activity
- Muscle Fibers, Skeletal/enzymology
- Muscle Fibers, Skeletal/pathology
- Muscle, Skeletal/enzymology
- Muscle, Skeletal/pathology
- Organ Size
- Rats
- Rats, Inbred OLETF
- Succinate Dehydrogenase/metabolism
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Affiliation(s)
- K Yasuda
- Department of Endocrinology, Metabolism and Diabetes Mellitus, Kinki University School of Medicine, Osaka-Sayama, Japan.
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22
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Yasuda K, Nishikawa W, Iwanaka N, Nakamura E, Seino Y, Tsuda K, Ishihara A. Abnormality in fibre type distribution of soleus and plantaris muscles in non-obese diabetic Goto-Kakizaki rats. Clin Exp Pharmacol Physiol 2002; 29:1001-8. [PMID: 12366392 DOI: 10.1046/j.1440-1681.2002.03757.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
1. Fibre type distributions of the slow soleus and fast plantaris muscles were investigated in 5-, 9- and 20-week-old male Goto-Kakizaki (GK) rats, as an animal model of non-obese diabetes, and were compared with those of age-matched non-diabetic Wistar rats. 2. Bodyweight and both soleus and plantaris muscle weights were lower in GK rats than in Wistar rats, regardless of age. In addition, both relative soleus and plantaris muscle weights per bodyweight were lower in GK rats than in Wistar rats, regardless of age. 3. In the soleus muscle, a higher percentage of type I fibres and a lower percentage of type IIA fibres were observed in 5- and 9-week-old GK rats. In addition, there were no type IIA fibres in 20-week-old GK rats. 4. In the plantaris muscle, there were no differences in fibre type distribution of 5-week-old GK rats. However, a higher percentage of type IIB fibres and a lower percentage of type I and type IIA fibres were observed in 9- and 20-week-old GK rats. In addition, there were no type I fibres in 20-week-old GK rats. 5. These results indicate that the decreased percentage of high-oxidative fibres (e.g. type IIA fibres in the soleus muscle and type I and type IIA fibres in the plantaris muscle) of the diabetic animals is concerned with an impairment in insulin sensitivity and glucose metabolism and is not related to bodyweight.
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Affiliation(s)
- Koichiro Yasuda
- Laboratory of Metabolism, Faculty of Integrated Human Studies, Kyoto University, Kyoto, Japan.
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23
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Kitagawa Y, Hashimoto K, Enomoto S, Shioda S, Nojyo Y, Sano K. Maxillofacial Deformity and Change in the Histochemical Characteristics of the Masseter Muscle after Unilateral Sectioning of the Facial Nerve in Growing Rabbits. Acta Histochem Cytochem 2002. [DOI: 10.1267/ahc.35.305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
| | - Kenji Hashimoto
- Department of Dentistry and Oral and Maxillofacial Surgery, Hamamatsu University School of Medicine
| | | | - Shigetoshi Shioda
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Tokyo Medical and Dental University
| | | | - Kazuo Sano
- Department of Dentistry and Oral Surgery, Fukui Medical University
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24
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Nakatani T, Nakashima T, Kita T, Hirofuji C, Itoh K, Itoh M, Ishihara A. Fiber Type Distribution, Cross-Sectional Area, and Succinate Dehydrogenase Activity of Soleus and Extensor Digitorum Longus Muscles in Spontaneously Hypertensive Rats. Acta Histochem Cytochem 2002. [DOI: 10.1267/ahc.35.315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Toshiaki Nakatani
- Department of Pharmacology, Nara Medical University
- Human Performance and Exercise Prescription Laboratory, Tenri University
| | | | - Taizo Kita
- Department of Pharmacology, Nara Medical University
- Department of Pharmacology, Daiichi College of Pharmaceutical Sciences
| | | | - Kazuo Itoh
- Graduate School of Integrated Science and Art, University of East Asia
| | - Minoru Itoh
- Laboratory of Neurochemistry, Faculty of Integrated Human Studies, Kyoto University
| | - Akihiko Ishihara
- Laboratory of Neurochemistry, Faculty of Integrated Human Studies, Kyoto University
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