Exercise training attenuates coronary smooth muscle phenotypic modulation and nuclear Ca2+ signaling.
Exercise training attenuates coronary smooth muscle phenotypic modulation and nuclear Ca2+ signaling.
复制标题
运动训练会减弱冠状动脉平滑肌表型调节和核 Ca2 信号传导。
DOI:
10.1152/ajpheart.00371.2001
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
Sturek,M
中科院分区:
文献类型:
--
作者:
Wamhoff,BR;Bowles,DK;Dietz,NJ;Hu,Q;Sturek,M
Physical inactivity is an independent risk factor for coronary heart disease, yet the mechanism(s) of exercise-related cardioprotection remains unknown. We tested the hypothesis that coronary smooth muscle after exercise training would have decreased mitogen-induced phenotypic modulation and enhanced regulation of nuclear Ca2+. Yucatan swine were endurance exercise trained (EX) on a treadmill for 16–20 wk. EX reduced endothelin-1-induced DNA content by 40% compared with sedentary (SED) swine (P< 0.01). EX decreased single cell peak endothelin-1-induced cytosolic Ca2+responses compared with SED by 16% and peak nuclear Ca2+responses by 33% (P< 0.05), as determined by confocal microscopy. On the basis of these results, we hypothesized that sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA) and intracellular Ca2+stores in native smooth muscle are spatially localized to dissociate cytosolic Ca2+and nuclear Ca2+. Subcellular localization of SERCA in living and fixed cells revealed a distribution of SERCA near the sarcolemma and on the nuclear envelope. These results show that EX enhances nuclear Ca2+regulation, possibly via SERCA, which may be one mechanism by which coronary smooth muscle cells from EX are less responsive to mitogen-induced phenotypic modulation.
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影响因子:
33.6
作者:
G. Owens
通讯作者:
G. Owens
影响因子:
4.8
作者:
Humbert, JP;Matter, N;Malviya, AN
通讯作者:
Malviya, AN
影响因子:
4
作者:
Gordienko, DV;Greenwood, IA;Bolton, TB
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Bolton, TB
DOI:
10.1152/ajpheart.1997.273.6.h2575
发表时间:
1997
期刊:
The American journal of physiology
影响因子:
--
作者:
Woodman,CR;Muller,JM;Laughlin,MH;Price,EM
通讯作者:
Price,EM
DOI:
10.1006/bbrc.1997.7037
发表时间:
1997-07-30
影响因子:
3.1
作者:
Bading, H;Hardingham, GE;Chawla, S
通讯作者:
Chawla, S