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Usuki F, Fujimura M, Nakamura A, Nakano J, Okita M, Higuchi I. Local Vibration Stimuli Induce Mechanical Stress-Induced Factors and Facilitate Recovery From Immobilization-Induced Oxidative Myofiber Atrophy in Rats. Front Physiol 2019; 10:759. [PMID: 31281262 PMCID: PMC6595229 DOI: 10.3389/fphys.2019.00759] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 05/31/2019] [Indexed: 01/22/2023] Open
Abstract
Muscle atrophy can be caused by unloading stress such as microgravity environments or cast immobilization. Therapies for such disuse muscle atrophy and their underlying mechanisms are incompletely understood. Here, we investigated the therapeutic effects of local vibration stimulation on immobilization-induced skeletal muscle atrophy. A rat model was made by placing the left hindlimb in a cast for 1 week, leading to oxidative myofiber atrophy without myopathic changes in soleus skeletal muscle. Vibration stimulus (90 Hz, 15 min) to the plantar fascia of the atrophic hindlimb was performed once a day using a hand-held vibration massager after removal of a cast at the end of the immobilization period. After 2 weeks, rats were dissected, and quantitative analysis of the cross-sectional areas of soleus myofibers was performed. The results revealed that vibration induced significant recovery from disuse muscle atrophy, compared with untreated immobilized samples. Furthermore, vibration treatment suppressed the fiber transition from slow to fast fiber types compared with vibration-untreated immobilized samples. Western blotting analyses of mechanical stress-induced factors revealed that the expression of mechano-growth factor (MGF), systemic insulin-like growth factor I, and the mechanotransduction protein, Yes-associated protein 1 (YAP1), was decreased in untreated immobilized soleus muscle, whereas vibration stimulation restored their expression. No change in the level of phosphorylation of YAP1Ser127 was observed, leading to no change in p-YAP1/YAP1 ratio in vibration-treated immobilized soleus muscle. The results indicate that vibration stimulus is effective to restore immobilization-induced inactivation of YAP1 pathway. Phosphorylation of ERK 1/2, but not AKT, was enhanced in vibration-treated immobilized soleus muscle. Furthermore, vibration stimuli restored immobilization-induced downregulation of the paired box transcription factor, PAX7, a critical factor for regenerative myogenesis in muscle satellite cells. Our results indicate that cyclic vibration stimuli are effective in activating satellite cells and facilitate recovery from immobilization-induced oxidative myofiber atrophy through upregulation of MGF and YAP1.
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Affiliation(s)
- Fusako Usuki
- Department of Clinical Medicine, National Institute for Minamata Disease, Kumamoto, Japan
| | - Masatake Fujimura
- Basic Medical Sciences, National Institute for Minamata Disease, Kumamoto, Japan
| | - Atsushi Nakamura
- Department of Clinical Medicine, National Institute for Minamata Disease, Kumamoto, Japan
| | - Jiro Nakano
- Department of Physical Therapy Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Minoru Okita
- Department of Physical Therapy Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Itsuro Higuchi
- Department of Physical Therapy, Faculty of Medicine, School of Health Sciences, Kagoshima University, Kagoshima, Japan
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Canu MH, Fourneau J, Coq JO, Dannhoffer L, Cieniewski-Bernard C, Stevens L, Bastide B, Dupont E. Interplay between hypoactivity, muscle properties and motor command: How to escape the vicious deconditioning circle? Ann Phys Rehabil Med 2018; 62:122-127. [PMID: 30394346 DOI: 10.1016/j.rehab.2018.09.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 09/24/2018] [Accepted: 09/30/2018] [Indexed: 10/28/2022]
Abstract
Activity-dependent processes addressing the central nervous system (CNS) and musculoskeletal structures are critical for maintaining motor performance. Chronic reduction in activity, whether due to a sedentary lifestyle or extended bed rest, results in impaired performance in motor tasks and thus decreased quality of life. In the first part of this paper, we give a narrative review of the effects of hypoactivity on the neuromuscular system and behavioral outcomes. Motor impairments arise from a combination of factors including altered muscle properties, impaired afferent input, and plastic changes in neural structure and function throughout the nervous system. There is a reciprocal interplay between the CNS and muscle properties, and these sensorimotor loops are essential for controlling posture and movement. As a result, patients under hypoactivity experience a self-perpetuating cycle, in with sedentarity leading to decreased motor activity and thus a progressive worsening of a situation, and finally deconditioning. Various rehabilitation strategies have been studied to slow down or reverse muscle alteration and altered motor performance. In the second part of the paper, we review representative protocols directed toward the muscle, the sensory input and/or the cerebral cortex. Improving an understanding of the loss of motor function under conditions of disuse (such as extended bed rest) as well as identifying means to slow this decline may lead to therapeutic strategies to preserve quality of life for a range of individuals. The most efficient strategies seem multifactorial, using a combination of approaches targeting different levels of the neuromuscular system.
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Affiliation(s)
- Marie-Hélène Canu
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France.
| | - Julie Fourneau
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France
| | - Jacques-Olivier Coq
- UMR 7289, CNRS, institut de neurosciences de la Timone, Aix-Marseille université, 13385 Marseille, France
| | - Luc Dannhoffer
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France
| | - Caroline Cieniewski-Bernard
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France
| | - Laurence Stevens
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France
| | - Bruno Bastide
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France
| | - Erwan Dupont
- EA 7369 "activité physique, muscle et santé", unité de recherche pluridisciplinaire sport santé société (URePSSS), université de Lille, 59000 Lille, France
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