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.
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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
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
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
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.
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影响因子:
16
作者:
James, PF;Grupp, IL;Lingrel, JB
通讯作者:
Lingrel, JB
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
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