Influence of exercise intensity on ERK/MAP kinase signalling in human skeletal muscle

Influence of exercise intensity on ERK/MAP kinase signalling in human skeletal muscle
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运动强度对人体骨骼肌ERK/MAP激酶信号传导的影响

DOI:
10.1007/s004240000417
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发表时间:
2000
期刊:
Pflügers Archiv
影响因子:
--
通讯作者:
J. Henriksson
J. Henriksson
中科院分区:
--
文献类型:
--
作者:
U. Widegren;C. Wretman;A. Lionikas;G. Hedin;J. Henriksson

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抽象的。丝裂原激活蛋白(MAP)激酶通路已被强调为运动和骨骼肌适应性变化之间的可能联系。在本研究中,研究了运动强度对人类骨骼肌中 ERK/MAP 激酶通路激活的影响。低(40% 最大耗氧量,VO2max,持续 30 分钟)和高(75% VO2max,持续 30 分钟)强度的单腿运动分别导致 ERK1/2 磷酸化增加 11.5±8.1 倍和 39.7±6.3 倍(平均值±SEM)(P<0.001)。 MEK1/2(ERK1/2 的上游激酶)的磷酸化随着运动强度的增加而增加 (P<0.05),在低强度和高强度下分别达到基础水平的 2.5±0.9 和 4.8±1.1 倍。统计分析揭示了两种激酶的基础、低强度和高强度运动水平之间的系统差异。在未运动的腿中,这两种激酶的磷酸化没有变化。转录因子环 AMP 反应元件结合蛋白 (CREB) 的磷酸化(ERK/MAP 激酶信号通路的可能下游靶标)不受运动影响。与运动后的粗湿肌肉相比,纯化的冻干肌肉中 ERK1/2 的磷酸化显着升高,而 CREB ​​则观察到相反的模式。总之,人类骨骼肌中 ERK1/2 和 MEK1/2 的磷酸化以运动强度依赖性方式增加,这似乎起源于肌纤维本身。
Abstract. The mitogen-activated protein (MAP) kinase pathways have been highlighted as a possible link between exercise and adaptive changes in skeletal muscle. In this study, the effect of exercise intensity on the activation of the ERK/MAP kinase pathway was investigated in human skeletal muscle. One-leg exercise at low (40% maximal oxygen consumption, VO2max, for 30 min) and high (75% VO2max for 30 min) intensity resulted in 11.5±8.1-fold and 39.7±6.3-fold (mean ±SEM) increases in ERK1/2 phosphorylation (P<0.001), respectively. The phosphorylation of MEK1/2, the upstream kinase of ERK1/2, increased with exercise intensity (P<0.05) to 2.5±0.9 and 4.8±1.1 times the basal level at the low and high intensity, respectively. The statistical analysis revealed a systematic difference between basal, low and high intensity exercise levels for both kinases. There was no change in the phosphorylation of either kinase in the non-exercised leg. The phosphorylation of the transcription factor cyclic AMP response element binding protein (CREB), a possible downstream target of the ERK/MAP kinase signalling pathway, was unaffected by exercise. The phosphorylation of ERK1/2 was significantly higher in purified freeze-dried compared to crude wet muscle after exercise, whereas the opposite pattern was observed for CREB. In conclusion, phosphorylation of ERK1/2 and MEK1/2 increases in an exercise intensity-dependent manner in human skeletal muscle and this seems to originate in the muscle fibres themselves.
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发表时间: 1996-08-01
影响因子: 5.1
作者:
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期刊: The American journal of physiology
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期刊: Biochemical and biophysical research communications.
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DOI: 10.1152/ajpcell.1996.271.1.c362
发表时间: 1996
期刊: The American journal of physiology
影响因子: --
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