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哺乳动物快、慢肌骨骼肌中肌浆网的相对功能

Relative capabilities of sarcoplasmic reticulum in fast and slow mammalian skeletal muscles.

作者信息

Briggs F N, Poland J L, Solaro R J

出版信息

J Physiol. 1977 Apr;266(3):587-94. doi: 10.1113/jphysiol.1977.sp011783.

Abstract
  1. The calcium uptake capabilities of the sarcoplasmic reticulum (SR) of the fat-twitch muscles extensor digitorum longus (EDL) and tibialis anterior (TA) of the rat and the extensor digitorum longus of the cat have been compared with the same capabilities of the slow-twitch soleus muscles of the rat and cat. 2. For the ra the Vmax values of sarcoplasmic reticulum from tibialis anterior, extensor digitorum longus and from soleus muscles were 50, 51, and 10 micronmole Ca2+/g per minute, respectively. 3. For the extensor digitorum longus and soleus muscles of the cat the Vmax values were 34 and 5-6 micronmole Ca2+/g per minute, respectively. 4. These data were compared with mechanical data as reported in the literature for the same muscles. The relative calcium uptake capabilities of sarcoplasmic reticulum from slow and fast muscles corresponded closely to the relative rates of relaxation of these muscles.
摘要
  1. 已将大鼠趾长伸肌(EDL)和胫骨前肌(TA)以及猫的趾长伸肌等快肌的肌浆网(SR)摄取钙的能力,与大鼠和猫的慢肌比目鱼肌的相同能力进行了比较。2. 对于大鼠,胫骨前肌、趾长伸肌和比目鱼肌的肌浆网Vmax值分别为每分钟50、51和10微摩尔Ca2+/克。3. 对于猫的趾长伸肌和比目鱼肌,Vmax值分别为每分钟34和5 - 6微摩尔Ca2+/克。4. 将这些数据与文献中报道的相同肌肉的力学数据进行了比较。慢肌和快肌的肌浆网相对摄取钙的能力与这些肌肉的相对松弛速率密切对应。

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