Contractile properties, fatiguability and glycolytic metabolism in fast- and slow-twitch rat skeletal muscles of various temperatures.
Contractile properties, fatiguability and glycolytic metabolism in fast- and slow-twitch rat skeletal muscles of various temperatures.
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不同温度下快肌和慢肌大鼠骨骼肌的收缩特性、疲劳性和糖酵解代谢。
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
L. Edström
中科院分区：
文献类型：
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作者：
E. Blomstrand;L. Larsson;L. Edström
在100 Hz （200 ms / s）间歇刺激大鼠胫骨前肌、指长伸肌（快抽动）和比目鱼肌（慢抽动）运动神经5 min时，研究了肌肉温度（28℃和36℃）对疲劳和糖代谢的影响。不管是快肌还是慢肌，等长张力的下降都不受肌肉温度的影响。28℃和36℃刺激时，快速收缩肌的糖原利用率相同，而比目鱼肌的糖原利用率在28℃时较低。28℃刺激后立即产生的葡萄糖-6-磷酸浓度高于36℃，而两个温度组之间的乳酸浓度没有差异。这些观察结果表明，与36℃时的速率相比，28℃时的糖原溶解速率在快肌中没有变化，但在慢肌中有所下降。这可能意味着在28℃时比目鱼肌收缩时ATP转换的经济性增加。
The influence of muscle temperature (28 and 36 degrees C) on fatiguability and glycolytic metabolism was studied during 5 min of intermittent stimulation of motor nerves of the tibialis anterior, extensor digitorum longus (fast-twitch) and soleus (slow-twitch) muscles in the rat at 100 Hz (200 ms per s). The decline in isometric tension was not affected by muscle temperature either in fast- or in slow-twitch muscles. In fast-twitch muscles the utilization of glycogen during stimulation was the same at 28 and 36 degrees C, while in the soleus muscle it was lower at 28 degrees C. The concentration of glucose-6-phosphate immediately after stimulation was higher in the muscles at 28 degrees C than in those at 36 degrees C, whereas no difference in lactate concentration was found between the two temperature groups. These observations indicate that compared with the rate at 36 degrees C, the rate of glycogenolysis at 28 degrees C is unchanged in fast-twitch, but decreased in slow-twitch muscle. This might imply increased economy of ATP turnover during contraction in the soleus muscle at 28 degrees C.
DOI：
10.1152/ajpcell.1982.242.3.c218
发表时间：
1982
期刊：
The American journal of physiology
影响因子：
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作者：
Hintz,CS;Chi,MM;Fell,RD;Ivy,JL;Kaiser,KK;Lowry,CV;Lowry,OH
通讯作者：
Lowry,OH