Role(s) of Mechanical Load and Satellite Cells in The Regulation of The Size of Soleus Muscle Fiber in Rats
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- Ohira Yoshinobu
- Graduate School of Medicine, Osaka University, Toyonaka City, Osaka 560-0043, Japan Graduate School of Frontier Biosciences, Osaka University, Toyonaka City, Osaka 560-0043, Japan
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- Kawano Fuminori
- Graduate School of Medicine, Osaka University, Toyonaka City, Osaka 560-0043, Japan
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- Dong Wang Xiao
- Graduate School of Medicine, Osaka University, Toyonaka City, Osaka 560-0043, Japan
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- Nakai Naoya
- Graduate School of Medicine, Osaka University, Toyonaka City, Osaka 560-0043, Japan
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- Ohira Takashi
- Graduate School of Frontier Biosciences, Osaka University, Toyonaka City, Osaka 560-0043, Japan
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- Okabe Hirooki
- Faculty of Letters, Kokushikan University, Setagaya-ku, Tokyo 154-0017, Japan
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- Naito Hisashi
- School of Health and Sports Science, Juntendo University, Inzai City, Chiba 270-1695, Japan
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- Goto Katsumasa
- Graduate School of Health Sciences, Toyohashi SOZO University, Toyohashi City, Aichi 440-8511, Japan
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Roles of mechanical load and satellite cells in the regulation of morphological properties of soleus muscle fibers were reviewed. Gravitational unloading by exposure to microgravity and/or by hindlimb suspension causes passive plantarflexion of ankle joints, which then shortens the length of muscle fibers and sarcomeres. Such phenomena cause the decrease of tension development. Atrophy of muscle fibers caused by inhibited protein synthesis is induced in association with decreased number and increased size of myonuclei. Distribution of satellite cells, which serve as a source of new myonuclei during regeneration after a muscle injury and/or atrophy, also decreases in response to lowered mechanical load. However, these responses are generally reversible, when the mechanical load applied to muscle fibers is increased, suggesting that satellite cells play important role(s) in the regulation of muscle fiber properties. The data also indicated that one of the satellite cell-related regulations of muscle fiber was mechanical load-dependent, which was influenced by the sarcomere length.
収録刊行物
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- Biological Sciences in Space
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Biological Sciences in Space 24 (3_4), 135-144, 2010
日本宇宙生物科学会
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詳細情報 詳細情報について
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- CRID
- 1390282679409767040
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- NII論文ID
- 130004450616
- 10029277900
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- NII書誌ID
- AN10164806
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- ISSN
- 1349967X
- 09149201
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- NDL書誌ID
- 11177609
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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