Phenotypical features of long Q-T syndrome in transgenic mice expressing human Na-K-ATPase alpha(3)-isoform in hearts.

Phenotypical features of long Q-T syndrome in transgenic mice expressing human Na-K-ATPase alpha(3)-isoform in hearts.
复制标题

心脏表达人Na-K-ATP酶α(3)亚型的转基因小鼠中长Q-T综合征的表型特征。

DOI:
10.1152/ajpheart.2000.279.5.h2133
复制
发表时间:
2000
期刊:
American journal of physiology. Heart and circulatory physiology
影响因子:
--
通讯作者:
Zahler,R
Zahler,R
中科院分区:
--
文献类型:
--
作者:
O'Brien,SE;Apkon,M;Berul,CI;Patel,HT;Saupe,K;Spindler,M;Ingwall,JS;Zahler,R

文献摘要

参考文献

相似文献

为了理解为什么成人心脏表达钠泵的三种亚型,我们产生了心脏中Na-K-ATP酶的人α3亚型过表达2.3至5.5倍的转基因小鼠(TGM)。与对照组相比,TGM的心脏具有增加的最大Na-K-ATP酶活性和哇巴因亲和力,即使Na-K-ATP酶泵位点(所有亚型)的密度与对照组小鼠相似。在灌注的心脏,收缩性在基线和哇巴因的存在下,往往是更大的TGM比对照组。麻醉TGM的体表心电图Q-T对窦性周期长度的依赖性更陡,心房起搏期间测量的Q-T间期在TGM中显著延长。窦性心律时TGM的Q-T离散度也有延长的趋势。因此,过表达人α3-亚型的TGM具有人长Q-T综合征的几个表型特征,尽管在Na+或K+通道中不存在先前描述的突变。
To understand why the adult human heart expresses three isoforms of the sodium pump, we generated transgenic mice (TGM) with 2.3- to 5.5-fold overexpression of the human α3-isoform of Na-K-ATPase in the heart. Hearts from the TGM had increased maximal Na-K-ATPase activity and ouabain affinity compared with control hearts, even though the density of Na-K-ATPase pump sites (of all isoforms) was similar to that of control mice. In perfused hearts, contractility both at baseline and in the presence of ouabain tended to be greater in TGM than in controls. Surface electrocardiograms in anesthetized TGM had a steeper dependence of Q-T on sinus cycle length, and Q-T intervals measured during atrial pacing were significantly longer in TGM. Q-T dispersion during sinus rhythm also tended to be longer in TGM. Thus TGM overexpressing human α3-isoform have several of the phenotypical features of human long Q-T syndrome, despite the absence of previously described mutations in Na+or K+channels.
DOI: 10.1016/s1097-2765(00)80349-4
发表时间: 1999-05-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
James, PF;Grupp, IL;Lingrel, JB
通讯作者: Lingrel, JB
HeLa 细胞中表达的大鼠 Na,K-ATP 酶 α 1、α 2 和 α 3 亚型的底物依赖性特性的比较。
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Jewell,EA;Lingrel,JB
通讯作者: Lingrel,JB
DOI: 10.1073/pnas.90.5.1824
发表时间: 1993-03-01
影响因子: 11.1
作者:
BLANCO, G;XIE, ZJ;MERCER, RW
通讯作者: MERCER, RW
心律失常的遗传和分子基础:对临床管理的影响第三部分。
DOI: --
发表时间: 1999
期刊: Circulation
影响因子: 37.8
作者:
S. Priori;J. Barhanin;R. Hauer;W. Haverkamp;H. Jongsma;A. Kleber;W. McKenna;D. Roden;Y. Rudy;K. Schwartz;P. Schwartz;J. Towbin;A. Wilde
通讯作者: A. Wilde
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Lucchesi,PA;Sweadner,KJ
通讯作者: Sweadner,KJ