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Endurance training facilitates myoglobin desaturation during muscle contraction in rat skeletal muscle
http://hdl.handle.net/2297/42207
http://hdl.handle.net/2297/422073906c9ce-2905-4541-a9a8-4c4443b2e0ee
名前 / ファイル | ライセンス | アクション |
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HU-MAUSUDA-K-09403.pdf (667.7 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-02 | |||||
タイトル | ||||||
タイトル | Endurance training facilitates myoglobin desaturation during muscle contraction in rat skeletal muscle | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Takakura, Hisashi
× Takakura, Hisashi× Furuichi, Yasuro× Yamada, Tatsuya× Jue, Thomas× Ojino, Minoru× Hashimoto, Takeshi× Iwase, Satoshi× Hojo, Tatsuya× Izawa, Tetsuya× Masuda, Kazumi |
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書誌情報 |
Scientific Reports 巻 5, p. 09403, 発行日 2015-03-24 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2045-2322 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1038/srep09403 | |||||
出版者 | ||||||
出版者 | Nature Publishing Group | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | At onset of muscle contraction, myoglobin (Mb) immediately releases its bound O2 to the mitochondria. Accordingly, intracellular O2 tension (PmbO2) markedly declines in order to increase muscle O2 uptake (mVO2). However, whether the change in PmbO2 during muscle contraction modulates mVO2 and whether the O2 release rate from Mb increases in endurance-trained muscles remain unclear. The purpose of this study was, therefore, to determine the effect of endurance training on O2 saturation of Mb (SmbO2) and PmbO2 kinetics during muscle contraction. Male Wistar rats were subjected to a 4-week swimming training (Tr group; 6 days per week, 30 min x 4 sets per day) with a weight load of 2% body mass. After the training period, deoxygenated Mb kinetics during muscle contraction were measured using near-infrared spectroscopy under hemoglobin-free medium perfusion. In the Tr group, the mVO2peak significantly increased by 32%. Although the PmbO2 during muscle contraction did not affect the increased mVO2 in endurance-trained muscle, the O2 release rate from Mb increased because of the increased Mb concentration and faster decremental rate in SmbO2 at the maximal twitch tension. These results suggest that the Mb dynamics during muscle contraction are contributing factors to faster VO2 kinetics in endurance-trained muscle. © 2015, Nature Publishing Group. All rights reserved. | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |