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
复制标题
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
复制
发表时间:
2000
期刊:
影响因子:
--
通讯作者:
J. Henriksson
中科院分区:
文献类型:
--
作者:
U. Widegren;C. Wretman;A. Lionikas;G. Hedin;J. Henriksson
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.
登录
查看更多内容
DOI:
10.1152/ajpendo.1996.271.2.e403
发表时间:
1996-08-01
影响因子:
5.1
作者:
Goodyear, LJ;Chang, PY;Moller, DE
通讯作者:
Moller, DE
DOI:
10.1152/ajpcell.1999.277.4.c701
发表时间:
1999
期刊:
The American journal of physiology
影响因子:
--
作者:
Hayashi,T;Hirshman,MF;Dufresne,SD;Goodyear,LJ
通讯作者:
Goodyear,LJ
DOI:
10.1152/ajpendo.1999.277.4.e724
发表时间:
1999-10-01
影响因子:
5.1
作者:
Wojtaszewski, JFP;Lynge, J;Richter, EA
通讯作者:
Richter, EA
DOI:
10.1006/bbrc.1998.8540
发表时间:
1998
期刊:
Biochemical and biophysical research communications.
影响因子:
--
作者:
Wang,PH;Schaaf,GJ;Chen,WH;Feng,J;Prins,BA;Levin,ER;Bahl,JJ
通讯作者:
Bahl,JJ
DOI:
10.1152/ajpcell.1996.271.1.c362
发表时间:
1996
期刊:
The American journal of physiology
影响因子:
--
作者:
Chin,JH;Okazaki,M;Frazier,JS;Hu,ZW;Hoffman,BB
通讯作者:
Hoffman,BB