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阻力訓練造成肌肉生長效應:mTOR所扮演的角色

摘要


骨骼肌蛋白的合成是呈現一種動態的(dynamic)平衡狀態,它受到外在的刺激,如:運動、神經的活性、賀爾蒙或生長因子(growth factors)所影響。目前已知mTOR (mammalian target of rapamycin)蛋白能整合細胞外的刺激,來調節蛋白質的合成與細胞的生長。近年來的研究發現,mTOR蛋白會因受到胰島素而活化,其中是透過活化PI3K/PKB路徑所達成。目前了解mTOR蛋白活化後會明顯增加其下游標的因子的活性,以達成細胞內蛋白質的合成。除此之外,在一些阻力運動研究中,發現AMPK蛋白與抑制mTOR蛋白的活化有關連。然而,到目前為止,有關於運動導致mTOR蛋白活化的研究,還有部分機轉仍需進一步的探索與釐清。因此,希冀藉由本文的陳述,能提供給先進們未來在研究運動、mTOR與肌肉生長有關之相關資訊。

參考文獻


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