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哺乳动物快肌的发育:动态特性与生化特性的相关性

Development of a mammalian fast muscle: dynamic and biochemical properties correlated.

作者信息

Drachman D B, Johnston D M

出版信息

J Physiol. 1973 Oct;234(1):29-42. doi: 10.1113/jphysiol.1973.sp010332.

Abstract
  1. The isometric properties and related biochemical properties of a developing rat fast muscle (extensor digitorum longus, EDL) have been determined during the 21 days after birth.2. At birth the maximum rate of rise of tension in a tetanus, a measure of speed of contraction, is slow; it begins to increase only after the 5th day and reaches adult values by 21 days.3. The increase in actomyosin ATPase activity of the rat EDL correlates closely (P << 0.001) with the changes in the maximum rate of rise during the same period of development.4. The relaxation phase of a tetanic response begins to increase in speed promptly after birth, and reaches adult values by the 21st day. The rate of calcium accumulation by the isolated sarcoplasmic reticulum (SR) increases with a similar time course.5. The separate contributions of contraction and relaxation mechanisms to the changes in the more conventional isometric properties of maturing muscles have been analysed.
摘要
  1. 在出生后的21天内,测定了发育中的大鼠快肌(趾长伸肌,EDL)的等长特性及相关生化特性。

  2. 出生时,强直收缩中张力的最大上升速率(一种收缩速度的度量)较慢;它仅在第5天后开始增加,并在21天时达到成年值。

  3. 大鼠EDL的肌动球蛋白ATP酶活性的增加与同一发育时期最大上升速率的变化密切相关(P << 0.001)。

  4. 强直反应的舒张期在出生后迅速开始加快,并在第21天时达到成年值。分离的肌浆网(SR)的钙积累速率以相似的时间进程增加。

  5. 分析了收缩和舒张机制对成熟肌肉更传统等长特性变化的单独贡献。

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本文引用的文献

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Calcium ion and muscle contraction.钙离子与肌肉收缩。
Prog Biophys Mol Biol. 1968;18:123-83. doi: 10.1016/0079-6107(68)90023-0.
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Dynamic properties of mammalian skeletal muscles.哺乳动物骨骼肌的动态特性。
Physiol Rev. 1972 Jan;52(1):129-97. doi: 10.1152/physrev.1972.52.1.129.

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