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
复制
发表时间:
2002
期刊:
American journal of physiology. Heart and circulatory physiology
影响因子:
--
通讯作者:
Sturek,M
Sturek,M
中科院分区:
--
文献类型:
--
作者:
Wamhoff,BR;Bowles,DK;Dietz,NJ;Hu,Q;Sturek,M

文献摘要

参考文献

被引文献

相似文献

缺乏身体活动是冠心病的独立危险因素,但运动相关的心脏保护机制仍不清楚。我们测试了这样的假设:运动训练后冠状动脉平滑肌会减少有丝分裂原诱导的表型调节并增强核 Ca2+ 的调节。尤卡坦半岛的猪在跑步机上接受了为期 16-20 周的耐力运动训练 (EX)。与久坐 (SED) 猪相比,EX 使内皮素 1 诱导的 DNA 含量降低了 40%(P<0.01)。通过共聚焦显微镜测定,与 SED 相比,EX 将单细胞峰值内皮素 1 诱导的胞质 Ca2+ 反应降低了 16%,将峰值核 Ca2+ 反应降低了 33%(P<0.05)。基于这些结果,我们假设天然平滑肌中的肌(内)质网Ca2+-ATP酶(SERCA)和细胞内Ca2+储存在空间上定位于解离胞质Ca2+和核Ca2+。 SERCA 在活细胞和固定细胞中的亚细胞定位揭示了 SERCA 在肌膜附近和核膜上的分布。这些结果表明,EX 可能通过 SERCA 增强核 Ca2+ 调节,这可能是来自 EX 的冠状平滑肌细胞对丝裂原诱导的表型调节反应较弱的一种机制。
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.
DOI: 10.1152/physrev.1995.75.3.487
发表时间: 1995-07
影响因子: 33.6
作者:
G. Owens
通讯作者: G. Owens
DOI: 10.1054/ceca.2000.0180
发表时间: 2001-01-01
期刊: CELL CALCIUM
影响因子: 4
作者:
Gordienko, DV;Greenwood, IA;Bolton, TB
通讯作者: Bolton, TB
从经过运动训练的猪身上分离出的冠状动脉阻力动脉中一氧化氮合酶 mRNA 的诱导。
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