Soleus Muscle

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Yoshinobu Ohira - One of the best experts on this subject based on the ideXlab platform.

  • Essential role of satellite cells in the growth of rat Soleus Muscle fibers.
    American Journal of Physiology-cell Physiology, 2008
    Co-Authors: Fuminori Kawano, Yoshiaki Takeno, Naoya Nakai, Yoko Higo, Masahiro Terada, Takashi Ohira, Ikuya Nonaka, Yoshinobu Ohira
    Abstract:

    Effects of gravitational loading or unloading on the growth-associated increase in the cross-sectional area and length of fibers, as well as the total fiber number, in Soleus Muscle were studied in...

  • mechanical load dependent regulation of satellite cell and fiber size in rat Soleus Muscle
    American Journal of Physiology-cell Physiology, 2006
    Co-Authors: Xiao Dong Wang, Akihiko Ishihara, Fuminori Kawano, Masahiro Terada, Yoshikazu Matsuoka, Kenji Fukunaga, Masamichi Sudoh, Yoshinobu Ohira
    Abstract:

    The effects of mechanical unloading and reloading on the properties of rat Soleus Muscle fibers were investigated in male Wistar Hannover rats. Satellite cells in the fibers of control rats were di...

  • Role of gravitational loading in the development of rat Soleus Muscle fibers.
    Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology, 2002
    Co-Authors: Fuminori Kawano, Akihiko Ishihara, Takeshi Nomura, Yoshiaki Takeno, Naoko Nakano, Yoshinobu Ohira
    Abstract:

    : Effects of hindlimb unloading during the first 3 months after birth on the development of Soleus Muscle fibers were studied in rats. The mean absolute weigh and cross-sectional area of whole Soleus Muscle in the unloaded rats were -1/3 and 1/4 of those in the controls, respectively. But the unloading did not affect the lengths of Muscle, at 90 degrees of ankle joint angle, and of Muscle fibers sampled from tendon to tendon, and the total sarcomere number. Since the total number of fibers in Soleus was not affected either, the inhibited increase of Muscle mass following unloading was mainly due to the smaller CSA of individual fibers. Numbers of both myonuclei and satellite cells were significantly less in unloaded than control rats. The % distribution of fibers expressing pure type I myosin heavy chain was significantly less in unloaded than controls (-23 %). Further, Muscle fibers with multiple innervation were noted in the unloaded rats. It is suggested that the development and/or differentiation of Soleus Muscle fibers are closely associated with gravitational loading and that the growth-associated increase in fiber number may be genetically programmed.

Akihiko Ishihara - One of the best experts on this subject based on the ideXlab platform.

  • mechanical load dependent regulation of satellite cell and fiber size in rat Soleus Muscle
    American Journal of Physiology-cell Physiology, 2006
    Co-Authors: Xiao Dong Wang, Akihiko Ishihara, Fuminori Kawano, Masahiro Terada, Yoshikazu Matsuoka, Kenji Fukunaga, Masamichi Sudoh, Yoshinobu Ohira
    Abstract:

    The effects of mechanical unloading and reloading on the properties of rat Soleus Muscle fibers were investigated in male Wistar Hannover rats. Satellite cells in the fibers of control rats were di...

  • Role of gravitational loading in the development of rat Soleus Muscle fibers.
    Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology, 2002
    Co-Authors: Fuminori Kawano, Akihiko Ishihara, Takeshi Nomura, Yoshiaki Takeno, Naoko Nakano, Yoshinobu Ohira
    Abstract:

    : Effects of hindlimb unloading during the first 3 months after birth on the development of Soleus Muscle fibers were studied in rats. The mean absolute weigh and cross-sectional area of whole Soleus Muscle in the unloaded rats were -1/3 and 1/4 of those in the controls, respectively. But the unloading did not affect the lengths of Muscle, at 90 degrees of ankle joint angle, and of Muscle fibers sampled from tendon to tendon, and the total sarcomere number. Since the total number of fibers in Soleus was not affected either, the inhibited increase of Muscle mass following unloading was mainly due to the smaller CSA of individual fibers. Numbers of both myonuclei and satellite cells were significantly less in unloaded than control rats. The % distribution of fibers expressing pure type I myosin heavy chain was significantly less in unloaded than controls (-23 %). Further, Muscle fibers with multiple innervation were noted in the unloaded rats. It is suggested that the development and/or differentiation of Soleus Muscle fibers are closely associated with gravitational loading and that the growth-associated increase in fiber number may be genetically programmed.

  • Effect of hypobaric hypoxia on rat Soleus Muscle fibers and their innervating motoneurons: a review.
    Japanese Journal of Physiology, 2000
    Co-Authors: Akihiko Ishihara, Kazuo Itoh, Minoru Itoh, Chiyoko Hirofuji
    Abstract:

    Mammalian skeletal Muscle fibers are classified into three basic types based on their enzyme histochemical profiles: fast-twitch glycolytic (FG), fast-twitch oxidative glycolytic (FOG), and slow-twitch oxidative (SO) types. The type-shift of fibers from FOG to SO in the slow Soleus Muscle of rats occurs during postnatal growth. Our previous studies have demonstrated that hypoxic exposure inhibits a growth-related type-shift of fibers from FOG to SO in the rat Soleus Muscle, irrespective of the duration and age at which the animals are exposed to hypoxia. Our previous studies have also revealed that a high percentage of FOG fibers in the Soleus Muscle of the hypoxia-adapted rats is found only under hypoxic conditions. Furthermore, we have found that these adaptations in fibers of the rat Soleus Muscle correspond well with those in motoneurons at the ventral horn of the spinal cord that innervate the Muscle fibers.

  • Effects of hypophysectomy on Soleus Muscle fibers and spinal motoneurons in rats.
    Acta Neuropathologica, 1995
    Co-Authors: Akihiko Ishihara, Kazuo Itoh, Minoru Itoh, Chiyoko Hirofuji, Hitomi Hayashi
    Abstract:

    The fiber type distribution of the Soleus Muscle in male and female rats was investigated 4 weeks after hypophysectomy. Oxidative enzyme activity of the Soleus motoneurons in the spinal cord was also examined by enzyme histochemical assay. In male rats, the total number of fibers in the Soleus Muscle was not changed after hypophysectomy, but the percentage of intermediate (INT) fibers (with intermediate adenosine triphosphatase activity following alkaline preincubation, and high succinate dehydrogenase and α-glycerophosphate dehydrogenase activities) was increased. All types of fibers in the Soleus Muscle of hypophysectomized rats showed high adenosine triphosphatase activity following acid preincubation. Oxidative enzyme activity of the motoneurons innervating the Soleus Muscle was not changed after hypophysectomy. Similar results were obtained in female rats. It is suggested that the increased percentage of INT fibers in the rat Soleus Muscle after hypophysectomy is due to a lack or reduced levels of growth hormones, and that the metabolic capacities of the Muscle fibers and of the innervating motoneurons are affected independently by hypophysectomy.

Fuminori Kawano - One of the best experts on this subject based on the ideXlab platform.

  • Essential role of satellite cells in the growth of rat Soleus Muscle fibers.
    American Journal of Physiology-cell Physiology, 2008
    Co-Authors: Fuminori Kawano, Yoshiaki Takeno, Naoya Nakai, Yoko Higo, Masahiro Terada, Takashi Ohira, Ikuya Nonaka, Yoshinobu Ohira
    Abstract:

    Effects of gravitational loading or unloading on the growth-associated increase in the cross-sectional area and length of fibers, as well as the total fiber number, in Soleus Muscle were studied in...

  • mechanical load dependent regulation of satellite cell and fiber size in rat Soleus Muscle
    American Journal of Physiology-cell Physiology, 2006
    Co-Authors: Xiao Dong Wang, Akihiko Ishihara, Fuminori Kawano, Masahiro Terada, Yoshikazu Matsuoka, Kenji Fukunaga, Masamichi Sudoh, Yoshinobu Ohira
    Abstract:

    The effects of mechanical unloading and reloading on the properties of rat Soleus Muscle fibers were investigated in male Wistar Hannover rats. Satellite cells in the fibers of control rats were di...

  • Role of gravitational loading in the development of rat Soleus Muscle fibers.
    Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology, 2002
    Co-Authors: Fuminori Kawano, Akihiko Ishihara, Takeshi Nomura, Yoshiaki Takeno, Naoko Nakano, Yoshinobu Ohira
    Abstract:

    : Effects of hindlimb unloading during the first 3 months after birth on the development of Soleus Muscle fibers were studied in rats. The mean absolute weigh and cross-sectional area of whole Soleus Muscle in the unloaded rats were -1/3 and 1/4 of those in the controls, respectively. But the unloading did not affect the lengths of Muscle, at 90 degrees of ankle joint angle, and of Muscle fibers sampled from tendon to tendon, and the total sarcomere number. Since the total number of fibers in Soleus was not affected either, the inhibited increase of Muscle mass following unloading was mainly due to the smaller CSA of individual fibers. Numbers of both myonuclei and satellite cells were significantly less in unloaded than control rats. The % distribution of fibers expressing pure type I myosin heavy chain was significantly less in unloaded than controls (-23 %). Further, Muscle fibers with multiple innervation were noted in the unloaded rats. It is suggested that the development and/or differentiation of Soleus Muscle fibers are closely associated with gravitational loading and that the growth-associated increase in fiber number may be genetically programmed.

James G Tidball - One of the best experts on this subject based on the ideXlab platform.

Xiao Dong Wang - One of the best experts on this subject based on the ideXlab platform.

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